Pcst 2011-2024 Form

Kindly read and provide your opinions.I am an Indian girl. I got placed in one of the marketing companies during my last of year of btech in banglore and moved there. I was in a relationship with a boy from past 4 years. During my stay in Bangalore, my boyfriend visited me from Delhi. Eventually we had a great time together. We decided to have sex but couldn't be successful as we both were virgins, however in that failure attempt I conceived ( don't know how). And after few days he left to his home.I was not happy with the job and also didn't want to stay away from my family who was in Delhi. So I worked for around 5 months, resigned and moved back to Delhi to prepare for government services.The moment I signNowed my home in Delhi, I was so much overwhelmed to meet my mother that I ignored the fact I missed my periods. My boyfriend reminded me many times to keep a check on my periods and go for the home kit pregnancy test. As I had a very unhealthy lifestyle in Bangalore, so I thought my periods delayed due to excessive weight gain. I ignored again.Gradually, I started feeling morning sickness, nauseousness, and a back pain. And finally I took a pregnancy test at home hiding from everybody at home. It came positive and shook my world.I contacted my boyfriend. And we both knew we wanted to abort as firstly I just completed my studies, my whole career was before me and secondly, our families didn't know about our affair so it will be a shock to both the families and thirdly I were not mentally ready to take the responsibility of a child, any boyfriend is always ready.In the name of jogging, meeting my friends, I used to meet my boyfriend to visit gynaecologist. I was advised to go for ultrasound. During the process of ultrasound, I thought it would be a peanut size, however we saw our baby, little fingers and developing. I was 2.5 months pregnant then. It again shook us. And now we both started to have feelings for the baby. My boyfriend warned me to not have motherly feelings as it will make abortion difficult. We took an appointment for abortion and left the hospital.On the day of abortion, again I lied to my mother that I am going to meet my female friend and left the house completely broken. We both went to hospital, I was taken inside a room adjacent to labour room. There I saw women in labour and waiting for their child to arrive. And I was there to kill my child. I broke out. I started crying and ran away from the room to meet my boyfriend waiting outside in the lobby. I hugged him. He collected my belongings and we sat outside the hospital crying. One nurse came out to ask us if we wanted to continue, I refused to go inside. We thought we will go for the baby.Then and there, my boyfriend called his mother and told in one straight line that my girlfriend is pregnant. We took an auto and directly went to meet his family. That was the first time, I met his family and his family came to know about me. His mother assured me that she would talk to my family and to get married. His father was standing there for whole time. His mother ordered spicy food for me and hugged me. My mind was blank.That day late Evening, I signNowed home and my mother was watching TV. She had no clue what is happening to her daughter. At that time she was alone at home as my father was working outside Delhi and used to come in 3–4 months. Anyhow, I gathered courage to tell my mother the truth that I have a boyfriend and that too I am pregnant. She started crying and cursing her own life to have a daughter like me. We both started crying. We both didn't have the courage to tell this news to my father as he was anyway from his home.The only thing was to get rid off this baby. And again I became blank. Everything was destroyed in these days. She called my boyfriend to go for abortion. My boyfriend came next day morning. And I went again to same hospital with numb mind. I went to the same room from where I ran out the previous day. The same doctor and the same nurse. This time I was numb.During the medical termination of pregnancy, I was given some injections which I don't know what were they. But after one injection, I felt labour pain for few time and another injection to eliminate that pain. Then finally I was shifted to OT and anaesthesia was administered. After that I slept and woke up with no child inside me and my boyfriend sitting beside me. He dropped me home and left. .Still I don't know what was right and what was wrong. But when I came back home after abortion, I slept that night with so much relief and felt as if my mother removed a big rock from my head and I felt so light and free.But after few days, I went into depression and started feeling guilty and missed something inside me. I felt incomplete.Gradually with time, I got the hold of my life and accepting it as a part of my life. It's been 3 years now. And still it is buried in some part of my mind which I don't discuss with anyone. This secret is among me, my boyfriend, his family and my mother. My father and my siblings have no idea of anything.Right now, I am happy. My boyfriend is well settled with a nice job. I told my father about him, and everything went well. Both families have met and soon we will get married.I always think to myself what would have happened of I would not have gone for abortion??I would have a child but how would my life be, Will my family be able to forgive me? Will I be respected in my husband's home?What would have happened to my career?Am I weak that I could not save my child from so called societal norm? Or have I taken a right decision to be financially independent before having a child?To make peace with myself, I talk to my child that i have not rejected you but postponed your time of arrival in my life so I can be psychologically and financially ready to accept you and take care of you whole heatedly. So you get the love from your maternal and paternal grandparents. So you will have a good life. The moment you come back, that would be the happiest moment in my life. Waiting for you.

PAN card applications have been made easier when the Indian Government introduced an online application portal. You will either have to fill out Form 49A or Form 49AA. Persons holding an Indian Citizenship need to fill out Form 49A. If you hold a foreign passport, you will have to fill out Form 49AA. Thus, OCI Cardholders, PIO cardholders are all eligible to fill out Form 49AA, while NRIs holding an Indian passport can fill out Form 49A.Here are 12 simple steps for you to apply for an Indian PAN Card from abroadLog in to the PAN Card Website online here nsdl.comScroll down the page and click on the link that says “Apply for a new PAN card”Depending on your status, fill out either Form 49A or Form 49AARead the guidelines carefully before filling in your details. Make sure that your overseas address matches the one in your proof of address document.Remember do not fill in an Indian address if you are an NRI, PIO or OCI cardholder.Once the form is filled, cross-check all your information and verify that it is correct before clicking the “Submit” button.If your form was filled out correctly, an acknowledgement page should appear on your screen.Print out a minimum of two copies of this acknowledgement slip. Ensure that you keep one with yourself for future reference.Paste your photos wherever it is required. You will need to place your signature wherever required in black ink only.Self-attest all copies you have made of your passport and the document proving your residential address.You will need to send these documents by mail to NSDL, PAN Unit. The address is as follows:NSDL at 'Income Tax PAN Services Unit, National Securities Depository Limited, 3rd floor, Sapphire Chambers, Near Baner Telephone Exchange, Baner, Pune – 411045On the envelope, you will need to mention that it is a PAN card application, and also mention your acknowledgement number. Write this in the format “PAN Card Application – Your Acknowledgement Number”Once you have mailed your documents within 15 days of completing your on-line application form, then you can track your application using your acknowledgement number.

I raised $500,000 at 19. I was on my way to change the world. Three years later everything burned down.This post is not about how to shoot for the stars or run a company. Others are better at that.This is about what not to do.I’ve made every mistake possible. But ironically, I’m constantly meeting teams doing the exact same things that caused my first startup to implode. Everything I’m writing about I’ve experienced first hand through my own startups as well as various businesses I’ve been involved in. It’s been all my fault and this is my story.Some of you will disagree with me. Others will have things to add. I’m happy to discuss in the comments.Here’s my attempt.ZUCKERBERG SYNDROMMy girlfriend didn’t know what I was working on for nine months. I slept with a chair blocking the front door. My phone was tapped. Corporate America and Uncle Sam were listening. Someone was going to kill me to steal the idea.I really believed this. So I did everything possible (literally) to avoid getting feedback out of the fear of having our idea stolen.Ultimately, secrecy and stupidity killed us. Three years and hundreds of thousands later, we released an alpha version to a modest 30 people for the first time. Everyone hated it. Our capital was gone. Our morale: zero.I see this all the time. Startup founders hiding their ideas because of the fear that someone will steal it. Remember: no one cares about you. Your biggest issue is getting discovered. If someone steals your idea, that means you’re doing something right.Because of this syndrome, most startups are wasting their time and money building products no one wants. Why? Lack of testing. The biggest mistake a company can make (product wise) is to avoid talking to and testing with potential and current users. Every day. It’s also one of the main reasons startup’s fail.If you’re not constantly releasing and looking for feedback you’re either a) delusional (me) thinking too many people will sign up/buy your product and you won’t be able to scale b) scared that it’s not good enough (me) or c) someone will steal your idea (as I was).A. SCALING“Your priority, in short, is proving that people will use your product at all. If they won’t, then it won’t matter if you can’t scale. If they will, then you will figure out a way to scale. I’ve never seen a startup die because it couldn’t scale fast enough. I’ve seen hundreds of startups die because people refused to embrace their product.” — Guy Kawasaki [Emphasis mine]I’ve done this and I’ve experienced this in the past three startups I’ve worked in. It’s completely delusional. If five out of five people tell you that they wouldn’t use your product (before you build), quit. If eight out of ten people tell you that they hate this feature and you empirically see that they’re not using it, kill it. Don’t assume. Always be testing.More on feedback below.b. TESTINGSee point A.C. STEALING(!)No one will steal your idea. It takes time, money, skills and immorality to steal. Not everyone is born that lucky.Most importantly, no one cares about your idea.They’ll only start caring when there’s a massive amount of initial traction (50,000+ users). By then, you’ve already established a strong user/customer base and it’s too late for the others.HIRING FOR WEAKNESSOnly hire for a strength that needs to be filled in your company. Never for a weakness.Not once did any of the startups I worked in hire for a strength. I repetitively recommended hiring people purely out of loneliness, fear and scarcity repetitively. Each time it sunk us deeper.But what does that mean?Hiring for a weakness means that you attempt to fill a weakness in the fundamenetals in your company by hiring for a weakness. Example: If you’re building a product and it’s not gaining traction and your company doesn’t have inherent fundamentals, hiring Ryan Holiday to sell your product won’t help. You can’t fight weakness with weakness.However, if you have a rockstar engineering team and you want to add a marketing person to help take the product get to another level, then you’re adding a strength.Hiring for weakness also means:a. You hire a B+ player instead of a A+ player.b. You hire people so that they go through the struggle with you, so that they share your fears and paranoia. Not so they execute on what’s needed.c. Hiring someone to fill a position. Not to compliment the rest of the company.d. Hiring someone and not having any idea of what the hell you want them to do.e. It means hiring someone because you think there’s no one else. Scarcity.f. Hiring a client’s friend. Because you’re scared.It’s ultimately about the fundamentals. If the fundamentals of the product and the team aren’t there, adding someone is just adding a weakness. It won’t help, because it’s not a strength.PAINTER’S DILEMMAApproving emails? One week treks. Our first wireframes? $40K and four months. Did we have a working product after all this? No. We failed.The Painter’s Dilemma is when you’re so deep in the details of your project that you don’t even know what the idea is anymore. You’re blind. When you’re too deep you need help.How to solve it? Stop. Talk to people. Get feedback. Iterate and build. Release. Breathe.Repeat the loop.The more feedback you get the healthier you and your product are.FEEDBACK*I can’t emphasize this enough. If you don’t get feedback (everyday) you will die. I never got feedback. EVER. Well, until the cash ran out. Oops.If you’re not getting qualitiative and quantitive feedback/data everyday, the cancer will start.It’s easy: speak to people, Google Analytics, send surveys. Just don’t hide from it.*This is the crucial and worth a dedicated blog post in the future.COMMUNICATE“Don’t talk to him, he doesn’t understand. He’s out of the picture next funding round anyways.” I hid everything internally. It was easy, we were in 5 different countries! Our developers were remote (I’ll get to that) and Basecamp was our only means of communication. In other startups, I wouldn’t included people from discussions because “it isn’t necessary. That isn’t their job”New features, awful designs, conniving plans were all pushed through a funnel. I was the leader of the deceiving. Architecting a blue print to push my own delusional “never test and succeed” agenda. My style? The longer the email the less likely someone important will read it. What a strategy. As always, the CEO is the biggest idiot.I don’t care if you’re a church, a tech startup or a non-profit. If you don’t have a system of communication in place that keeps everyone aware of what everyone is doing in the company, in real-time, for every milestone, everyday, you will die very soon.Lesson: Live and breath Scrum.SCREW LAWYERSLawyers are criminals.I spent $15,000 on legal documents/fees we never used. Every entrepreneur/startup I’m involved with thinks lawyers are the first step to success. Bullshit.DOCSAll the legal documents you ever need are available online. If you’re B2B, all companies that you’ll work with have their own standard LOEs, NDAs, etc., that they anyways steal from Fortune 500 companies. Request it. Then use it. B2C? Here.BUT I NEED A TRADEMARK!Unless you have 10,000 clients you don’t need to think about copyright or even the name. Prove the concept first. Worry later. If you do have to worry, those are very nice worries to have.PATENT IT!Patenting something that isn’t validated with at least 10,000 clients is moronic. Ironically, this is the only mistake my first startup didn’t follow through with (fully, at least).DECISION MAKINGI was traumatized from taking decisions. Most startups never take decisions. In other statups I work in, decisions took weeks. People join startups for the reason of avoiding bureaucracy but everyone still does it. Why? Lack of trust and overview of the team, so they choke the process (have I suggested Scrum?).The board should decide on the vision and the group should decide what to execute on by creating a backlog for the week. The team should then have the power to execute it. With a great communication process in place, teammates should be able to take decisions without reporting to anyone while keeping everyone updated with everything’s that going on, live. Have a flat structure to achieve this by using Scrum.Let people do their jobs. Trust them. Don’t have a tedious review process as most startups do. Don’t suffocate the system. Empower your people.Read Scrum by Jeff Sutherland on how to manage your team. Then read Team of Teams by General Stanley McChrystal for how to organize the information flow. Both books compliment each other perfectly.THE BOARDThe ideal board is 3–5 people maximum if you’re a startup. Anything above that means that either no decisions will ever be taken (my first company) or someone has a hidden agenda and profits from a discombobulated board.A business is not a democracy. Unanimous decisions don’t work and will never work.Who’s should I put on the Board?Only investors/shareholders who hold a large stake and are extremely active in the success of your venture.INVESTORSSmart Money vs Still MoneyJust because someone is offering you cash almost always means you shouldn’t accept it.Your investor can have the greatest contacts in the pharmecutical industry. She can be CEO of Merck. If she doesn’t have a massive network in whatever industry you’re in, it’s worthless. The money will be worth nothing. This is true 100% of the time.Always onboard investors that can help you in your niche industry.MEETINGSThis is my top 3 favorites. Most won’t agree with me on this.I’ve never been to a meeting that has made me money/funded my venture. I don’t think anyone has. Has anyone ever handed you a check at a meeting? I doubt it. Today, it usually happens by wire-transfer.Meetings are pointless. Every team I meet, consult for/work with all think that going to meetings is the most crucial part of business. Most importantly, the whole team should be there. Pick up the fucking phone. Travel is time and money expensive. Even if you’re taking a cab.I would fly 10,000 miles for a 3 hour meeting and then fly back to Europe that same day. $30K. Gone.“If you had to identify, in one word, the reason why the human race has not achieved, and never will achieve, its full potential, that word would be: ‘meetings.’” - Dave BarryMost of the discussion can be ironed out over email and FaceTime.Ok yes, I agree. Meeting in person is important. But not until it’s necessary. Most of the time, it’s unecessary. And even when it is, it shouldn’t always be an excuse to leave work for a business lunch or to Shanghai for the day.Avoid meetings. Get more done.It’s a waste of time 99% of the time.FOUNDING PARTNERS = YOUR SPOUSEYou will be married to your partners and investors for the next 7–10 years. Choose wisely.Know your team. Speak to your investor’s enemies. Get references for everyone.Don’t be a deceiver. Use Scrum.WORKING HOURSWe worked 16 hour days. Yey! Startup life!No. Work 8–10 hours and you’ll get more done than working 18 hours a day. Don’t believe me. It’s proven.Working 18 hour days leads to a burn out, which leads to painter’s dilemma, then delusion, then deceiving others around you, then depression. Then it’s too late.Ultimately, the more you work the more mistakes you’re prone to make. Mistakes made are mistakes that need to be corrected. Mistakes that aren’t correct can take up to 24x longer to correct than if they were corrected immediately.But you can’t see that. You’re burned out. You’re in Painter.PRODUCT / MARKET VALIDATIONAnother reason I refused to test in the three product startups I was involved in was because “the ideas work successfully elsewhere. They will also work here.” Doesn’t work like that.Just because you’re making a mishmash of several products that have product/market validation elsewhere doesn’t mean people are willing to use your product. I have yet to meet a new founder who hasn’t claimed this.In order for someone to switch to your product, your product needs to be at least 8x better.*Is your product really 8x better than your biggest competitor? If the answer isn’t a clear yes, quit.*Read Hooked by Nir Eyal and Ryan Hoover for how to build habit forming products.RECREATING THE WHEEL“God gave you eyes, so plagarize.” -Michael LewisNo need to re-create the wheel. Everything is out there already for a reason. Use APIs, read books (many books), steal functions, designs, ideas, marketing slogans, branding, on boarding processes, software, colors, clients, everything from other people/companies who are successful.This doesn’t mean that you shouldn’t test it in your own environment. You must validate every single function that you put out there. Use the Lean Startup KanBan by Ash Maurya for this.DILUTIONWe gave away 51% for our first funding round. How much did we plan to keep when we “exited?” Think about that. It doesn’t make sense.Startups do this all the time. If you retain 51% after the seed round, how much does the founding team plan to keep by Series B? 20%? If you take the average of what you got paid for equity after the exit + your salary you’ll be paying more in taxes with a minimum wage paycheck for the past 8 years it took you to exit. Might as well work in a shoe store.If you don’t have the bargaining power (a validated product) to raise money with, quit.GUYS IN SUITSOur tech partners wore suits. That made us comfortable. They ended up quoting $100k. We ended up with nothing.If you see tech people in suits, run.OUTSOURCINGI lost well over $100,000 for our first version that was outsourced. We were smart enough to not learn from our mistakes so we found another team to outsource with. Another hefty sum gone. Only myself to blame.I’ve had terrible experiences with outsourcing and great experiences with in-house development.However, many products (we all use everyday) have found great success in outsourcing. I also know many entrepreneurs who outsource and are extremely succesful. While there are massive benefits, there are also downfalls. If you plan to, find a free consulting company that has pre-screened teams.Either way, using Scrum increases your chances of success in-house or out.YOUR TEAMEntrepreneurs read about Steve Jobs’ management style and think he was a tyrant. So they curse at their employees and tell everyone that they are “shit.” They think that’s how a company should be run and that’s how teammates should be treated. Wrong. Treat your team like shit and you’ll get shit.Either way, that’s not how Steve Jobs did it. Steve Jobs empowered his team. He told them that what they’re outputting is shit because he knew that they could do better. Because they are the best in the industry. He made them feel good. He challenged them and today Apple is Apple because of that.On the other hand, I lied. Didn’t speak about the hard things and repressed whatever fear or worry we had. We were scared that someone would quit or that we would look bad if we showed our emotions in front of our investors.You should always be able to tell your teammates all the fears and worries you have. Chances are, if you’re worried about something, everyone is worried about the same thing. Bring it up. Talk about it. I keep mentioning Scrum* because it encourages team members telling each other what’s bothering them and what’s impending the growth progress. This is key to not failing.Not once, in any of the startups I was in, did I or others get credit for great work or for their ideas that ended up being implemented. Not once did anyone congratualte a teammate on a engineering triumph, a beautiful design or a new lead. Startups think “business is business. This isn’t a cute place to pat each other on the backs.”BUT THAT’S EXACTLY WHAT A BUSINESS SHOULD BE. You should be holding each other up, helping one another and listening to the problems in the team. Because ultimately, you’re on the same mission.The second the negativity flows in people become scared. They stop raising issues, telling you how they feel and how to improve the business. When that happens you start to slowly die because you’ve fell into dillusion that everything is working. Six months later, you’re on the street.Empower your team. Congratulate people. Love each other. When someone screws up, tell them that. But also tell them how to improve and ask them why they think they screwed up and how to make their job easier.You’re a team. Be one.*Believe it or not, I’m not affiliated with Scrum in anyway. I’m not even a Scrum Master.—When I reflect on all the stupidity I’ve personally done and the startups I’ve been involved in, I realize that the only thing I ever followed up through and executed with absolute perfection, were the things that eventually ended up killing us: not telling a soul what our idea was. Talking to lawyers. Partnering with bad teams. Hiring out of weakness. Going to too many meetings. No decision making system. Not using Scrum. Hiring people out of fear. Hiding from reality.Mistakes are simple to make but hard to correct. They’re usually the first option that pops up. But as entrepreneurs we do thing because they’re hard, not because they’re easy.Hard choices take a long time to get right. It takes guts, intuition, experience and lots of luck. But never settle. Never accept your situation.Life can always be better.…..This was originally posted on the NY Observer and our blog on Penta.Follow me @lukaivicev or contact me directly at luka@getpenta.com.

You arrive at lecture and sit perched on the edge of your seat, notebook open to a clean page and freshly-sharpened pencil in hand. You follow every word the professor says. Well, maybe you zone out a few times in the middle, but who doesn't? Besides, you're copying everything down and can review it later.That weekend, you diligently read the textbook. Maybe you skip a few parts since it's a busy week, but you definitely study the chapter summary and read all the examples. You do the homework problems, even starting three days early. When you're stuck, you go to office hours and ask the TA for help until they show you how to do it.Before the exam, you study your notes and the published homework solutions. You try the practice exam, and it seems the pieces are finally falling into place. You can solve most of the problems and remember most of the formulas and derivations! At last you take the final, referencing the single allowed sheet of notes you prepared at length the night before. You get almost every question right, or at least partial credit, and take home a well-deserved A.Three months later, you can hardly remember what the class was all about. What's going on? Why did you forget so much? Are you the only one? Should you have memorized more and worked even harder?The answer is no. A student who memorizes the entire physics curriculum is no more a physicist than one who memorizes the dictionary is a writer. Studying physics is about building skills, specifically the skills of modeling novel situations and solving difficult problems. The results in your textbook are just the raw material. You're a builder. Don't spend all your time collecting more materials. Collect a few, then build things. Here's how.The Cathedral and the StonesWhile delivering his famous set of freshman lectures on physics, Richard Feynman held a few special review sessions. In the first of these, he discussed the problem of trying to memorize all the physics you've learned:It will not do to memorize the formulas, and to say to yourself, "I know all the formulas; all I gotta do is figure out how to put 'em in the problem!"Now, you may succeed with this for a while, and the more you work on memorizing the formulas, the longer you'll go on with this method - but it doesn't work in the end.You might say, "I'm not gonna believe him, because I've always been successful: that's the way I've always done it; I'm always gonna do it that way."You are not always going to do it that way: you're going to flunk - not this year, not next year, but eventually, when you get your job, or something - you're going to lose along the line somewhere, because physics is an enormously extended thing: there are millions of formulas! It's impossible to remember all the formulas - it's impossible!And the great thing that you're ignoring, the powerful machine that you're not using, is this: suppose Figure 1 - 19 is a map of all the physics formulas, all the relations in physics. (It should have more than two dimensions, but let's suppose it's like that.)Now, suppose that something happened to your mind, that somehow all the material in some region was erased, and there was a little spot of missing goo in there. The relations of nature are so nice that it is possible, by logic, to "triangulate" from what is known to what's in the hole. (See Fig. 1-20.)And you can re-create the things that you've forgotten perpetually - if you don't forget too much, and if you know enough. In other words, there comes a time - which you haven't quite got to, yet - where you'll know so many things that as you forget them, you can reconstruct them from the pieces that you can still remember. It is therefore of first-rate importance that you know how to "triangulate" - that is, to know how to figure something out from what you already know. It is absolutely necessary. You might say, "Ah, I don't care; I'm a good memorizer! In fact, I took a course in memory!"That still doesn't work! Because the real utility of physicists - both to discover new laws of nature, and to develop new things in industry, and so on - is not to talk about what's already known, but to do something new - and so they triangulate out from the known things: they make a "triangulation" that no one has ever made before. (See Fig. 1-21.)In order to learn how to do that, you've got to forget the memorizing of formulas, and to try to learn to understand the interrelationships of nature. That's very much more difficult at the beginning, but it's the only successful way.Feynman's advice is a common theme in learning. Beginners want to memorize the details, while experts want to communicate a gestalt.Foreign language students talk about how many words they've memorized, but teachers see this as the most trivial component of fluency. Novice musicians try to get the notes and rhythms right, while experts want to find their own interpretation of the piece's aesthetic. Math students want to memorize theorems while mathematicians seek a way of thinking instead. History students see lists of dates and facts while professors see personality, context, and narrative. In each case, the beginner is too overwhelmed by details to see the whole. They look at a cathedral and see a pile of 100,000 stones.One particularly clear description of the difference between the experts' and beginners' minds comes from George Miller's 1956 study "The magical number seven, plus or minus two." Miller presented chess boards to both master-level chess players and to novices. He found that the masters could memorize an entire board in just five seconds, whereas the novices were hopeless, getting just a few pieces. However, this was only true when the participants were memorizing positions from real chess games. When Miller instead scattered the pieces at random, he found the masters' advantage disappeared. They, like the novices, could only remember a small portion of what they'd seen.The reason is that master-level chess players have "chunked" chess information. They no longer have to remember where each pawn is; they can instead remember where the weak point in the structure lies. Once they know that, the rest is inevitable and easily reconstructed.I played some chess in high school, never making it to a high level. At a tournament, I met a master who told me about how every square on the chess board was meaningful to him. Whereas, when writing down my move, I would have to count the rows and columns to figure out where I had put my knight ("A-B-C, 1-2-3-4, knight to C4") he would know instantaneously because the target square felt like C4, with all the attendant chess knowledge about control of the center or protection of the king that a knight on C4 entails.To see this same principle working in yourself right now, memorize the following. You have two seconds:首先放花生酱，然后果冻Easy, right? Well, it would be if you were literate in Chinese. Then you’d know it’s the important maxim, “first the peanut butter, then the jelly”.You can remember the equivalent English phrase no problem, but probably don't remember the Chinese characters at all (unless you know Chinese, of course). This is because you automatically process English to an extreme level. Your brain transforms the various loops and lines and spaces displayed on your screen into letters, then words, then a familiar sandwich-related maxim, all without any effort. It's only this highest-level abstraction that you remember. Using it, you could reproduce the detail of the phrase "first the peanut butter, then the jelly" fairly accurately, but you would likely forget something like whether I capitalized the first letter or whether the font had serifs.Remembering an equally-long list of randomly-chosen English words would be harder, a random list of letters harder still, and the seemingly-random characters of Chinese almost impossible without great effort. At each step, we lose more and more ability to abstract the raw data with our installed cognitive firmware, and this makes it harder and harder to extract meaning.That is why you have such a hard time memorizing equations and derivations from your physics classes. They aren't yet meaningful to you. They don't fit into a grand framework you've constructed. So after you turn in the final, they all start slipping away.Don't worry. Those details will become more memorable with time. In tutoring beginning students, I used to be surprised at how bad their memories were. We would work a problem in basic physics over the course of 20 minutes. The next time we met, I'd ask them about it as review. Personally, I could remember what the problem was, what the answer was, how to solve it, and even details such as the minor mistakes the student made along the way and the similar problems to which we'd compared it last week. Often, I found that the student remembered none of this - not even what the problem was asking! What had happened was, while I had been thinking about how this problem fit into their understanding of physics and wondering what their mistakes told me about which concepts they were still shaky on, they had been stressed out by what the sine of thirty degrees is and the difference between "centrifugal" and "centripetal".Imagine an athlete trying to play soccer, but just yesterday they learned about things like "running" and "kicking". They'd be so distracted by making sure they moved their legs in the right order that they'd have no concept of making a feint, much less things like how the movement pattern of their midfielder was opening a hole in the opponent's defense. The result is that the player does poorly and the coach gets frustrated.Much of a technical education works this way. You are trying to understand continuum mechanics when Newton's Laws are still not cemented in your mind, or quantum mechanics when you still haven't grasped linear algebra. Inevitably, you'll need to learn subjects more than once - the first time to grapple with the details, the second to see through to what's going on beyond.Once you start to see the big picture, you'll find the details become meaningful and you'll manipulate and remember them more easily. Randall Knight's Five Easy Lessons describes research on expert vs. novice problem solvers. Both groups were given the same physics problems and asked to narrate their thoughts aloud in stream-of-consciousness while they solved them (or failed to do so). Knight cites the following summary from Reif and Heller (1982)Observations by Larkin and Reif and ourselves indicate that experts rapidly redescribe the problems presented to them, often use qualitative arguments to plan solutions before elaborating them in greater mathematical detail, and make many decisions by first exploring their consequences. Furthermore, the underlying knowledge of such experts appears to be tightly structured in hierarchical fashion.By contrast, novice students commonly encounter difficulties because they fail to describe problems adequately. They usually do little prior planning or qualitative description. Instead of proceeding by successive refinements, they try to assemble solutions by stringing together miscellaneous mathematical formulas from their repertoire. Furthermore, their underlying knowledge consists largely of a loosely connected collection of such formulas.Experts see the cathedral first, then the stones. Novices grab desperately at every stone in sight and hope one of them is worth at least partial credit.In another experiment, subjects were given a bunch of physics problems and asked to invent categories for the problems, then put the problems in whatever category they belonged. Knight writes:Experts sort the problems into relatively few categories, such as "Problems that can be solved by using Newton's second law" or "Problems that can be solved using conservation of energy." Novices, on the other hand, make a much larger number of categories, such as "inclined plane problems" and "pulley problems" and "collision problems." That is, novices see primarily surface features of a problem, not the underlying physical principles.The "Aha!" FeelingIt is clear that your job as a student is to slowly build up the mental structures that experts have. As you do, details will get easier. Eventually, many details will become effortless. But how do you get there?In the Mathoverflow question I linked about memorizing theorems, Timothy Gowers wroteAs far as possible, you should turn yourself into the kind of person who does not have to remember the theorem in question. To get to that stage, the best way I know is simply to attempt to prove the theorem yourself. If you've tried sufficiently hard at that and got stuck, then have a quick look at the proof -- just enough to find out what the point is that you are missing. That should give you an Aha! feeling that will make the step far easier to remember in the future than if you had just passively read it.Feynman approached the same questionThe problem of how to deduce new things from old, and how to solve problems, is really very difficult to teach, and I don't really know how to do it. I don't know how to tell you something that will transform you from a person who can't analyze new situations or solve problems, to a person who can. In the case of the mathematics, I can transform you from somebody who can't differentiate to somebody who can, by giving you all the rules. But in the case of the physics, I can't transform you from somebody who can't to somebody who can, so I don't know what to do.Because I intuitively understand what's going on physically, I find it difficult to communicate: I can only do it by showing you examples. Therefore, the rest of this lecture, as well as the next one, will consist of doing a whole lot of little examples - of applications, of phenomena in the physical world or in the industrial world, of applications of physics in different places - to show you how what you already know will permit you to understand or to analyze what's going on. Only from examples will you be able to catch on.This sounds horribly inefficient to me. Feynman and Gowers both signNowed the highest level of achievement in their domains, and both are renowned as superb communicators. Despite this, neither has any better advice than "do it a lot and eventually expertise will just sort of happen." Mathematicians and physicists talk about the qualities of "mathematical maturity" and "physical insight". They're essential to moving past the most basic level, but it seems that no one knows quite where they come from.Circular ReasoningThere are certainly attempts to be more systematic than Feynman or Gowers, but before we get to that, let's take a case study. I recall that as a college freshman, I knew that the formula for the acceleration of a ball orbiting in a circle was [math]a = v^2/r[/math]. I wanted to know why, so I drew a picture:I imagined a small ball starting on the right side of the circle, heading upwards where the blue velocity vector [math]v_1[/math] is drawn. The ball moves around the circle, goes counter-clockwise over the top and then heads downwards on the left hand side, where the red velocity [math]v_2[/math] is. The ball's velocity changed, which means it accelerated. The acceleration is[math]a = \frac{\Delta v}{\Delta t}[/math][math]\Delta v[/math] is clearly [math]2v[/math], and [math]\Delta t[/math] is the time it takes to go half way around the circle, which is [math]\frac{\text{distance}}{\text{speed}} = \frac{\pi r}{v}[/math]. Hence, the acceleration is[math]a = \frac{2v}{\pi r/v} = \frac{2 v^2}{\pi r} \approx 0.64 \frac{v^2}{r}[/math]This isn't quite right. The answer is supposed to be [math]v^2/r[/math]. Somehow there is an extra factor of [math]2/\pi[/math] floating around.If you already understand calculus, this is a silly and obvious mistake. But for me it took quite some time - weeks, I think - until I understood that I had found the average acceleration, but the formula I was trying to derive was the instantaneous acceleration.The way I broke out of this mental rut was to think about the case where the ball has gone one quarter of the way around, like this:Then the same approach gives[math] a = \frac{\Delta v}{\Delta t} = \frac{2\sqrt{2}v^2}{\pi r} \approx 0.90 \frac{v^2}{r}[/math],which is closer to the right value. If you try it when the ball goes 1/8 the way around, you get[math]a = \frac{4 \sqrt{2 - \sqrt{2}}v^2}{\pi r} \approx 0.97 \frac{v^2}{r}[/math]and you're getting the idea that what you have to do is take the limit as the ball goes an infinitesimal fraction of the way around. (By the way, if I had been clever, maybe I'd have discovered Viète's formula this way, or something like it. I only recognized this now because I remembered encountering Viete's formula. So memory certainly has its place in allowing you to make connections. It's just not as central as beginners typically believe.)How do you do that "infinitesimal fraction of the way around" thing? Well, if the ball travels an angle [math]\theta[/math] around the circle, we can draw the before and after velocities asand[math] \Delta v = 2 \sin (\theta/2) v[/math]which in the limit [math]\theta \to 0[/math] becomes[math] \Delta v = \theta v[/math]and[math] a = \frac{\Delta v}{\Delta t} = \frac{\theta v}{\theta r/v} = \frac{v^2}{r}[/math]But all of this took a long time to come together in my mind, assembling gradually, but in discrete chunks with each small epiphany. As I walk through it now, I can see there are many concepts involved, and in fact if you're a beginning student it's likely that the argument isn't clear because I skipped some steps.The main idea in that argument is calculus - we're looking at an infinitesimal displacement of the ball. To understand the entire argument, though, we also need to do a fair amount of geometry, develop the idea of sliding velocity vectors around in space so they originate at the same point, introduce the concept of an arbitrary angle of rotation [math]\theta[/math], find the time it takes to rotate by that angle for a given [math]r[/math] and [math]v[/math], use the small-angle approximation of the sine function, and maybe a couple other things I'm not seeing.That's a lot of mental exercise. It's no wonder that working all this out for yourself is both harder and more effective than reading it in the book. Just reading it, you'll skip over or fail to appreciate how much goes into the derivation. The next time you try to understand something, you want those previously-mastered ideas about geometry and calculus already there in your mind, ready to be called up. They won't be if you let a book do all the work.Today, I can solve this problem in other ways. For example, I could write down the rectangular coordinates and differentiate, describe the motion in the complex plane as [math]r e^{i\omega t}[/math] and differentiate that, or transform to a rotating reference frame and note the centrifugal force on the stationary ball and conclude it must be accelerating in an inertial frame. A cute one is to write down the position and velocity vectors by intuition, and notice that going from position to velocity you rotate 90 degrees and multiply the length by [math]v/r[/math]. To go from velocity to acceleration is mathematically identical, so rotating another 90 degrees and multiply by [math]v/r[/math] again we obtain the answer.I can argue from dimensional analysis that the only way to get something with units of acceleration is [math]v^2/r[/math], or heuristically point out that if you increase the velocity, the velocity vectors get bigger, but we also go from one to the next in less time, so the acceleration ought to scale with [math]v^2[/math], etc.I also see aspects of the problem that I didn't back then, such as that this isn't really a physics problem. There are no physical laws involved. It would become a physics problem if we included that the ball is circling due to gravitational forces and used Newton's gravitational law, for example, but as it stands this problem is just a little math.So yes, I can easily memorize this result and provide a derivation for it. I can do that for most of the undergrad physics curriculum, including the pendulum and Doppler formulas you mentioned, and I think I could ace, or at least beat the class average, on the final in any undergraduate physics course at my university without extra preparation. But I can do that because I built up a general understanding of physics, not because I remember huge lists of equations and techniques.How to Chunk ItI can do these things now because of years' of accumulated experience. Somehow, my mind built chunks for thinking about elementary physics the same way chess players do for chess. I've taught classes, worked advanced problems, listened to people, discussed with people, tutored, written about physics on the internet, etc. It's a hodgepodge of activities and approaches, and there's no way for me to tease from my own experience what was most important to the learning process. Fortunately, people from various fields have made contributions to understanding how we create the cognitive machinery of expertise. Here is a quick hit list.George Pólya's How to Solve It examines the problem-solving process as a series of stages, and suggests the student ask themselves specific questions like, "Is it clear that there enough information to solve the problem?"Scott H Young, Cal Newport, and many others give specific advice on study skills: how to take notes, how to diagram out the connections between ideas, how to test your knowledge, how to fit what you're learning into the larger scheme of things, etc.When you do need to memorize things, spaced repetition software like Anki takes an algorithmic, research-backed approach to helping you remember facts with the minimum of time and effort.K. Anders Ericsson has tried to find the key factors that make some forms of practice better than others - things like getting feedback as you go and having clear goals. He refined these into the concept of Deliberate Practice. He also believes there is no shortcut. Even if you practice effectively, it usually takes around 10,000 hours of hard work to signNow the highest levels in complex fields like physics or music.Chunking and assigning meaning are your mind's ways of dealing with the information overload of the minutiae that inevitably pop up in any field. Another approach, though, is to try to expand your mind's ability to handle those minutiae. If you can push your "magical number" from seven to ten, you'll be able to remember and understand more of your physics work because it takes a bit longer to fill your cognitive buffer. Dual N-Back exercises are the most popular method of working on this. Nootropic drugs may also provide benefits to some people. Low-hanging fruit first, though. If you aren't sleeping 8-9 hours a day, getting a few hours of exercise a week, and eating healthy food for most meals, you're probably giving up some of your mind's potential power already. (There is individual variation, though.)Howard Gardner is one champion of the idea of multiple intelligences, or different learning types. When working on electric fields, for example, Gardner might advise you to study Maxwell's equations, draw pictures of vector fields and intuit their curls, get up and use your body, pointing your arms around to indicate electric field vectors, write or speak about what you're studying, learn with a friend or tutor, or maybe even create musical mnemonics to help you study, depending on where your personal strengths lie. Certainly, all students should build facility with drawing sketches, plotting functions, manipulating equations, visualizing dynamics, and writing and speaking about the material.Psychologist Carol Dweck's research studies the effect of your attitude towards learning on how much you learn, finding, for example, that children praised for their hard work are likely to press on further and learn more when given tough problems, whereas children praised for their intelligence are more likely to give up.Productivity guru David Allen helps people organize their lives and defeat procrastination with specific techniques, such as dividing complicated tasks into small, specific "next actions" and deciding when to do them, then organizing them in a planner system.Mihály Csíkszentmihályi believes that people operate best in a state of "flow", where they are so focused on the task they find it enjoyable and engrossing to the point they're innately motivated to continue. He emphasizes, for example, that the task needs to be the right level of difficulty - not too hard and not too easy - to find the flow state. (Some people think this state doesn't jibe with deliberate practice; others contend it's possible to achieve both simultaneously.)Taken together, this yields enough practical advice to chew on for months or years. To summarize, when you are learning something new:Try to figure it out for yourselfIf you get stuck, take a peek at your textbook to get the main ideaTeach the idea to someone elseOnce you've learned something, repeat the entire reasoning behind it for yourself, working through each detailAsk yourself Pólya's questions when you're stuckUse Young and Newport's techniques to map out the ideas of your class and relate them to your prior knowledgeMake Anki decks and review them a few minutes a day to retain what you've learnedMake sure your study sessions include all the principles of deliberate practice, especially feedback, challenge, and attentionBuild an image of yourself as someone motivated by learning and proud of having worked hard and effectively rather than as someone proud of being smart or renowned.Find a organizational system that lets you handle all the details of life smoothly and efficiently.Search for the flow state, notice when you enter it, and put yourself in position to find flow more and more often.Work on different subjects, reviewing both advanced and basic material. They will eventually all form together in your mind, and you're likely to have to take at least two passes at any subject before you understand it well.Take care of your physical health.This list does not include reading every page of the textbook or solving every problem at the end of the chapter. Those things aren't necessarily bad, but they can easily become rote. Building the material up for yourself while dipping into reference materials for hints is likely to be more effective and more engaging, once you learn to do it. It is a slow, difficult process. It can be frustrating, sitting there wracking your brain and feeling incredibly stupid for not understanding something you know you're supposed to have down. And strangely, once you have it figured out, it will probably seem completely obvious! That's your reward. Once the thing is obvious, you've chunked it, and you can move on. (Though you still need to review with spaced repetition.) This is the opposite of the usual pattern of sitting in lectures and feeling you understand everything quite clearly, only to find it all evaporated the next day, or acing a final only to find your knowledge is all gone the next month.That, I believe, summarizes the practical knowledge and advice about the learning process. Memorizing equations and derivations is difficult and ineffective because they are just the details. You can only handle a few details before your mind gets swamped. To cope, train yourself to the point where you process equations and physical reasoning automatically. This will free your conscious effort up to take in the big picture and see what the subject is all about.It Just Gets In The Way, You SeeSomehow, I've developed a "this is calculus" instinct, so that if I see the problem about acceleration in circular motion, or any other problem about rates of change, I know that it's talking about a limit of some kind. Where does this instinct exist in my brain? What form does it take? How does it get called up at the right time?George Lakoff believes that almost everything we understand is via metaphor. Any sort of abstract concept is understood by linking it to concrete concepts we've previously understood. For example, in Where Mathematics Comes From, Lakoff and coauthor Rafael Nuñez argue that we think of the mathematical concept of a "set" as a sort of box or container with things stacked in it. We reason about sets using our intuition about boxes, then later go back and support our conclusions with the technical details. Learning to reason about sets, then, is learning to think about the box metaphor and translate it back and forth into the formal language of axioms and theorems. This seems to fit with the introspective reports of many mathematicians, who say they build intuitive or visual models of their mathematics when finding results, then add in the deltas and epsilons at the end.This may be why we so often see beginning students asking things like, "but what is the electron, really?" If they were told it is just a tiny little ball, that would work, because it's a very easy metaphor. But instead, they're told it's not a ball, not a particle, not a wave, not spinning even though it has spin, etc. In fact, they're told to dismiss all prior concepts entirely! This is something Lakoff believes is simply impossible. No wonder students are bobbing in an ocean of confused thought bubbles, with nothing but mixed metaphors to grasp at until the last straw evaporates, across the board.Linguists like Steven Pinker believe that the language we use tells us how our mind works. Physicists certainly do have a specialized lexicon, and the ability to use it correctly correlates pretty well to general physics intuition, in my experience. In his review of Pinker's The Stuff of Thought, Douglas Hofstadter summarizes:Pinker shows, for example, how subtle features of English verbs reveal hidden operations of the human mind. Consider such contrasting sentences as "The farmer loaded hay into the wagon" and "The farmer loaded the wagon with hay." In this pair, the verb "load" has two different kinds of objects: the stuff that gets moved and the place it goes. Also, in the first sentence, the destination is the object of one preposition; in the second, the stuff is the object of another. Pinker sees these "alternations" as constituting a "microclass" of verbs acting this way, such as "spray" ("spray water on the roses" versus "spray the roses with water"). Where does this observation lead him? To the idea that we sometimes frame events in terms of motion in physical space (moving hay; moving water) and sometimes in terms of motion in state-space (wagon becoming full; roses becoming wet).Moreover, there are verbs that refuse such alternations: for instance, "pour." We can say "I poured water into the glass" but not "I poured the glass with water." What accounts for this curious difference between "load" and "pour"? Pinker claims that pouring merely lets a liquid move under gravity's influence, whereas loading is motion determined by the human agent. "Pour" and "load" thus belong to different microclasses, and these microclasses reveal how we construe events. "[W]e have discovered a new layer of concepts that the mind uses to organize mundane experience: concepts about substance, space, time, and force," Pinker writes. " . . . [S]ome philosophers consider [these concepts] to be the very scaffolding that organizes mental life. . . . But we've stumbled upon these great categories of cognition . . . by trying to make sense of a small phenomenon in language acquisition."If correct, then in order to think about physics the way an expert does, we should learn to speak the way experts do. If we try to solve physics problems using the words "load" and "pour", we may be carrying around a bunch of distracting anthropocentric baggage. If we don't recognize that, we'll get stuck, saying the problem "doesn't make sense", when really it's our linguistically-instilled expectations that are wrong. To combat this, it may be just as helpful to gain facility with the language of physics as with its equations.Five Easy Lessons provides a clear example of such difficulties: the case study of "force". As I type this, my laptop is sitting on a desk which exerts an upward force on it. Few beginning students believe this is really a force, even after they've been browbeaten into drawing arrows for the "normal force" on exam diagrams.The problem is in the way we use "force":"The robber forced the door open." "Your apology sounded forced.""...the force of the explosion..." "...the force of righteousness...""I'm being forced to take physics even though I'll never use it."Literally or figuratively, we think of "force" as implying not only motion, but intent or purpose, and also control. Force is for people pushing on things, or maybe for cars and projectiles. These things are using energy and will run down if left alone. But the desk under my laptop? It's just sitting there, totally passive. How could it be "exerting a force" when it doesn't even get tired? Needing some sort of rationalization for why the laptop doesn't fall, beginners say that it's not that the desk exerts a force on the laptop, the desk just provides something for the laptop to sit on. Or if something falls on the desk, the desk didn't exert a force to stop it. It just got in the way is all. Why doesn't the professor understand this obvious difference? A desk exerting a force? Come on...Five Easy Lessons describes how students only overcome this difficulty after seeing a classroom demonstration where, using a laser pointer and a mirror laid on the desk top, the professor demonstrates how when a heavy cinder block is laid on the desk, the surface responds by bending out of its natural shape, exerting force on the cinder block like a compressed spring would.You may need to find many such visualizations before you can reconcile your colloquial use of words with their use in physics. But this might also be dangerous, because although finding a way to make physics obey your idea about what a word means works decently in this case, in other instances it's your expectations for the word that ought to change. (Relativity, with words like "contraction", "slowing down", etc. is a good example.)Mythologist Joseph Campbell believes that we understand the world primarily through story. Perhaps we understand derivations, experimental evidence, and the logic behind physical conclusions as a sort of story, and it's in building this story that our cognitive chunks are formed.Mind The Neural Gap JunctionsYou are the pattern of neural activity in your brain. When a part of you changes, building a new memory, installing a new habit, or constructing a tool to approach a class of problems, that change must be reflected somewhere in your brain.Lesswrong user kalla724 describes this process in "Attention control is critical for changing/increasing/altering motivation"First thing to keep in mind is the plasticity of cortical maps. In essence, particular functional areas of our brain can expand or shrink based on how often (and how intensely) they are used. A small amount of this growth is physical, as new axons grow, expanding the white matter; most of it happens by repurposing any less-used circuitry in the vicinity of the active area. For example, our sense of sight is processed by our visual cortex, which turns signals from our eyes into lines, shapes, colors and movement. In blind people, however, this part of the brain becomes invaded by other senses, and begins to process sensations like touch and hearing, such that they become signNowly more sensitive than in sighted people. Similarly, in deaf people, auditory cortex (part of the brain that processes sounds) becomes adapted to process visual information and gather language clues by sight.But, they caution, these neural changes occur primarily to those parts of our minds to which we pay conscious attention:A man is sitting in his living room, in front of a chessboard. Classical music plays in the background. The man is focused, thinking about the next move, about his chess strategy, and about the future possibilities of the game. His neural networks are optimizing, making him a better chess player.A man is sitting in his living room, in front of a chessboard. Classical music plays in the background. The man is focused, thinking about the music he hears, listening to the chords and anticipating the sounds still to come. His neural networks are optimizing, making him better at understanding music and hearing subtleties within a melody.A man is sitting in his living room, in front of a chessboard. Classical music plays in the background. The man is focused, gritting his teeth as another flash of pain comes from his bad back. His neural networks are optimizing, making the pain more intense, easier to feel, harder to ignore.You need to pay attention not just to doing physics, but to the right parts of doing physics - the parts most related to intuition.James Nearing gave his advice on how to do this in Mathematical Tools for PhysicistsHow do you learn intuition?When you've finished a problem and your answer agrees with the back of the book or with your friends or even a teacher, you're not done. The way do get an intuitive understanding of the mathematics and of the physics is to analyze your solution thoroughly. Does it make sense? There are almost always several parameters that enter the problem, so what happens to your solution when you push these parameters to their limits? In a mechanics problem, what if one mass is much larger than another? Does your solution do the right thing? In electromagnetism, if you make a couple of parameters equal to each other does it reduce everything to a simple, special case? When you're doing a surface integral should the answer be positive or negative and does your answer agree?When you address these questions to every problem you ever solve, you do several things. First, you'll find your own mistakes before someone else does. Second, you acquire an intuition about how the equations ought to behave and how the world that they describe ought to behave. Third, It makes all your later efforts easier because you will then have some clue about why the equations work the way they do. It reifies the algebra.Does it take extra time? Of course. It will however be some of the most valuable extra time you can spend.Is it only the students in my classes, or is it a widespread phenomenon that no one is willing to sketch a graph? (\Pulling teeth" is the cliche that comes to mind.) Maybe you've never been taught that there are a few basic methods that work, so look at section 1.8. And keep referring to it. This is one of those basic tools that is far more important than you've ever been told. It is astounding how many problems become simpler after you've sketched a graph. Also, until you've sketched some graphsof functions you really don't know how they behave.(To see the advice on graphs, along with a detailed step-by-step example, see his book, free online)Brown Big SpidersOne of the difficulties with chunks is that they're mostly subconscious. We may ultimately know of their existence, as did the chess master who told me he knew how each square of the chess board felt, but their precise nature and the process of their creation are almost immune to introspection. The study methods I've talked about above are empirically useful in creating chunks, so we have guidelines for how to make new chunks in general, but we usually don't know which ones we are creating.Lesswrong user Yvain comments on the essay Being a teacherI used to teach English as a second language. It was a mind trip.I remember one of my students saying something like "I saw a brown big spider". I responded "No, it should be 'big brown spider'". He asked why. Not only did I not know the rule involved, I had never even imagined that anyone would ever say it the other way until that moment.Such experiences were pretty much daily occurrences.In other words, the chunkiest cognitive process we have - language - develops largely without our awareness. (In retelling this story, I've met a surprising number of people who actually did know about adjective order in English, but most of them either learned English as a second language or had studied it in psychology or linguistics course.)This makes it incredibly difficult for physics teachers or textbook writers to communicate with beginners. It's inevitable that beginners will say that a certain lecturer or book just doesn't explain it clearly enough, or needs to give more examples. Meanwhile, the lecturer has no idea why what they said wasn't already perfectly clear and thinks the example was completely explicit. Neither party can articulate the problem, the student because they can't see the incorrect assumption they're making, the professor because they don't realize they've already made such an assumption.For example, once I was proctoring a test in a physics class for biology majors. A question on the test described a certain situation with light going through a prism and asked, "What is the sign of the phase shift?" A student came up to ask for clarification, and it wasn't until they'd asked their question three times that I finally got it. They thought they were supposed to find the "sign" as in a signpost, or marker. There would be some sort of observable behavior that would indicate that a phase shift had occurred, and that was the "sign of the phase shift." Until then, I was only able to think of "sign" as meaning positive or negative - did the wave get advanced or retarded?If you want to learn a language with all those rules you don't even know about, you need to immerse yourself. Endless drills and exercises from a book won't be enough, as millions of Americans a decade out of high school straining to remember, "Dondé esta el baño?" can attest. You need to read, speak, see, and hear that language all around you before it takes.To learn physics, then, read, speak, and hear it all around you. Attend colloquia. Read papers. Solve problems. Read books. Talk to professors and TA's, and expose yourself to all the patterns of thought that are the native language of the field.As you learn, you will build the right chunks to think about physics without realizing what they are. But there's a flip side to this problem, which is that when you're not doing physics, you can build the wrong chunks. They can get in the way, and again you don't realize it.In Drawing on the Right Side of the Brain, Betty Edwards discusses an exercise she gave her art students:One day, on impulse, I asked the students to copy a Picasso drawing upside down. That small experiment, more than anything else I had tried, showed that something very different is going on during the act of drawing. To my surprise, and to the students' surprise, the finished drawings were so extremely well done that I asked the class, "How come you can draw upside down when you can't draw right-side up?" The students responded, "Upside down, we didn't know what we were drawing."When we see a recognizable image, unconscious chunking immediately gets to work, interpreting, imparting meaning, and inevitably distorting. Learning to draw, according to Edwards, involves circumventing harmful chunks as much as building helpful ones.So it is with physics. The ideas about force, animation, and intent discussed in the laptop-and-desk example seem to illustrate just this problem. Five Easy Lessons lists many of the known misconceptions that students have somehow taught themselves in each topic of introductory physics - for example that electric current gets used up as it goes around a circuit. But I think it's likely that there are many more such obstructive thought patterns that we don't yet know exist. These might be more general notions about such things as cause and effect, what nature "wants" to accomplish, etc.I Feel DumbEducators are perpetually frustrated by what seems like an outrageous pattern. They explain something clearly. The students all claim to understand perfectly, and can even solve quantitative problems. Still, when you ask the students to answer basic conceptual questions, they get it all wrong. How is this possible?In this YouTube video, Veritasium explores what happens when you explain something clearly:Amazingly, the clearer the explanation, the less students learn. Humans have a huge array of cognitive biases. In general, these various biases work so that we'll keep believing whatever it was we believed to begin with, unless there's a really good reason not to. Someone giving a clear, authoritative physics lecture does not register in your mind as a good reason to check your beliefs, so you listen happily and rave about what a great lecture it was, all while maintaining your wrong ideas.However, with the right stimulus you can get your brain to throw out the old, wrong ideas. Entering such a state is a prerequisite to true learning, and fortunately we can detect it in ourselves. We call it confusion.Confusion is a message from your emotional mind (the part that tells your analytical mind what decisions to start justifying). It's saying, "Hey, something about our beliefs is very wrong, and this is actually important. Pay attention and figure it out."A great lecturer, instead of being clear, will confuse students by asking them to predict ahead of time what a demonstration will show, then do it, and the opposite actually occurs. Or they will ask students to solve questions that sound straightforward, but in fact the students can't figure out. Only after confusion sets in will the teacher reveal the trick.You want to defeat your biases, toss out your wrong beliefs, and learn physics to the Feynman level - the level where you create the knowledge as you go along. Even many specialists never fully get there, instead rising to increasingly-sophisticated levels of rehashing the same memorized arguments in a way that can carry them quite far and trick most people. The only way to avoid this is to spend many, many hours thoroughly confused.Have you ever lost an argument, only to think of the perfect retort two days later when stopped at a traffic light? This shows how your mind will continue working on hard problems in the background. It eventually comes up with a great answer, but only if you first prime it with what to chew on. This works for physics problems just as well as for clever comebacks, once you find good problems to grapple with. I conjecture that engaging this subconscious system requires a strong emotional connection to the problem, such as the frustration or embarrassment of being dumbstruck in an argument or the confusion of being stumped by a hard problem.Confusion is essential, but often also unpleasant. When you repeatedly feel frustrated or upset by your confusion, your mind unconsciously learns to shy away from hard thinking. You develop an ugh field.This could happen for different reasons. A common one arises in people who judge themselves by their intellect. Confusion for such people is a harsh reminder of just how limited they are; it's a challenge to their very identity. Whether for this reason or some other, it's common for students and academics to fall into patterns of procrastination and impostor syndrome when navigating the maze of confusion that come with their chosen path.I don't have the answer for this. I have heard many people tell their stories, but I have yet to figure out my own. Sometimes confusion feels awful, and my story in physics is a jerky, convoluted one because of how I've dealt with that. But once in a while a problem is so good that none of that matters. When I find one of these problems, it hijacks my mind like Cordyceps in a bullet ant, jerking me back to a fresh piece of scratch paper again and again, sometimes for days. If you signNow this state over and over, you'll know Feynman meant by, "What I cannot create I do not understand"Get confused. Solve problems. Repeat. The universe is waiting for you.ReferencesIn order of appearance in this answerFeynman's Tips on Physics: Richard P. Feynman, Michael A. Gottlieb, Ralph Leighton: 9780465027972: Amazon.com: Bookssoft question - Memorizing theorems - MathOverflowThe Magical Number Seven, Plus or Minus Two (wikipedia)The Magical Number Seven (original paper)Google Translate (Chinese phrase)Knight, Randall. Five Easy Lessons pp 37Reif and Heller, 1982 Viète's formulaHow To Solve It: A New Aspect of Mathematical Method (Amazon)How To Solve It (summary)How to Solve It (Wikipedia)Learn Faster with the Feynman Technique (Scott Young. His page is start to get spammy.)Study Hacks " About (Cal Newport)Anki - powerful, intelligent flashcardsSpaced repetition (review by Gwern)K. Anders Ericsson (Wikipedia)The Role of Deliberate Practice in the Acquisition of Expert PerformanceDual N-Back FAQ (gwern)Food Rules An Eater`s Manual (Amazon, how to eat)Core Performance Essentials (Amazon, exercise) Exercise is an interesting case because not everyone responds very well. For the majority of people it's worth the time.Howard Gardner (wikipedia)The Unschooled Mind: How Children Think And How Schools Should Teach: Howard E. Gardner (Amazon)The Perils and Promises of Praise (article by Dweck)Mindset, Dweck's book.Flow (psychology) (Wikipedia)Flow: The Psychology of Optimal Experience: Mihaly Csikszentmihalyi: 9780061339202: Amazon.com: Books David Allen, Getting Things Done® and GTD® Online to-do list and task management (One possible GTD software)How to Setup Remember The Milk for GTD George Lakoff (professional site)George Lakoff (Wikipedia)Where Mathematics Come From: How The Embodied Mind Brings Mathematics Into Being: George Lakoff, Rafael Nuñez: 9780465037711: Amazon.com: BooksLoaded sentences (Hofstadter reviews Pinker)The Stuff of Thought: Language as a Window into Human Nature: Steven Pinker: 9780143114246: Amazon.com: Books The Power of Myth: Joseph Campbell, Bill Moyers: 9780385418867: Amazon.com: BooksAttention control is critical for changing/increasing/altering motivationMathematical Tools for Physics (Nearing)Being a teacher - Less WrongDrawing on the Right Side of the Brain: The Definitive, 4th Edition: Betty Edwards: 9781585429202: Amazon.com: BooksVeritasium (channel)List of cognitive biases (wikipedia)Dunning–Kruger effect (wikipedia) Ugh fields - Less WrongUseful Quora AnswersAnonymous's answer to What is it like to understand advanced mathematics? Does it feel analogous to having mastery of another language like in programming or linguistics?Satvik Beri's answer to How do math geniuses understand extremely hard math concepts so quickly?Qiaochu Yuan's answer to Why is it almost impossible to learn a mathematical concept on Wikipedia? They are very difficult to follow, especially if one doesn't have a solid background in the subject.Christopher VanLang's answer to What should I do if my PhD advisor and lab colleagues think I'm stupid?What did Richard Feynman mean when he said, "What I cannot create, I do not understand"?Debo Olaosebikan's answer to What are some words, phrases, or expressions that physicists frequently use in ordinary conversation?Paul King's answer to How does the arbitrary become meaningful? How does the human mind convert things like art into emotion and experience?What are some English language rules that native speakers don't know, but still follow?User's answer to What's an efficient way to overcome procrastination?Further ReadingI feel a little sleazy writing this answer because when I mention, for example, Carol Dweck doing research on the psychology of mindsets or K. Anders Ericsson studying deliberate practice, in fact there are thousands of people working in those fields. The ones I've mentioned are simply the most public figures or those I've come across by chance. I haven't even read the original research in most of these cases, relying on summaries instead.The answer is also preliminary and incomplete. There's lots of research left to be done, and I'm not an expert in what's out there. Still, here is a guide to some further resources that have informed this answer.For an overview of the psychology of learning, I like Monisha Pasupathi's audio course How We Learn from The Teaching Company. It covers many clever experiments designed to help you build a model of what happens in your mind as you learn.Bret Victor explores software solutions to visualizing the connection between physical world, mathematical representation, and mental models. Check outThe Ladder of AbstractionExplorable ExplanationsI think it's helpful to build an innate impression of your mind as not perceiving the world directly, but as concocting its own, tailored interpretation from sense data. All your consciousness ever gets to experience is the highly-censored version. The books of Oliver Sacks are great for making this clear by illustrating what happens with people for whom some of the processing machinery breaks down.The LessWrong Sequences were, for me, a powerful introduction to the quirks of human thought, preliminary steps towards how to work best with the firmware we've got, and what it means to seek truth.Selected BibliographyThese are some physics books to which have helped me so far. I'm not choosing them for clear exposition or specialty knowledge in a certain subject, but for how I think they helped me understand the way to think about physics generally.Blandford and Thorne, Applications of Classical PhysicsEpstein, Thinking PhysicsFeynman, Lectures on Physics------------ The Character of Physical Law------------ QED: The Strange Theory of Light and Matter------------ Tips on PhysicsGeroch, General Relativity from A to BLevi, The Mathematical MechanicLewin, Walter "Classical Mechanics", "Electricity and Magnetism" (video lectures with demonstrations on MIT OpenCourseWare)Mahajan, Street-Fighting MathematicsMorin, Introduction to Classical MechanicsNearing, Mathematical Tools for PhysicsPurcell, Electricity and Magnetism----------, Back of the Envelope ProblemsSchey, Div, Grad, Curl, and All ThatThomas and Raine, Physics to a DegreeThompson, Thinking Like a PhysicistWeisskopf, "The Search for Simplicity" (articles in Am. J. Physics)ImagesFeynman's Tips on Physics, Feynman, Gottlieb, LeightonArchitectural detail- cut stone wallFile:NotreDameI.jpg

NOOOOOOO. You are talking to a military romance scammer. I received an email from the US Army that directly answers your question that is pasted below please keep reading.I believe you are the victim of a military Romance Scam whereas the person you are talking to is a foreign national posing as an American Soldier claiming to be stationed overseas on a peacekeeping mission. That's the key to the scam they always claim to be on a peacekeeping mission.Part of their scam is saying that they have no access to their money that their mission is highly dangerous.If your boyfriend girlfriend/future husband/wife is asking you to do the following or has exhibited this behavior, it is a most likely a scam:Moves to private messaging site immediately after meeting you on Facebook or SnapChat or Instagram or some dating or social media site. Often times they delete the site you met them on right after they asked you to move to a more private messaging siteProfesses love to you very quickly & seems to quote poems and song lyrics along with using their own sort of broken language, as they profess their love and devotion quickly. They also showed concern for your health and love for your family.Promises marriage as soon as he/she gets to state for leave that they asked you to pay for.They Requests money (wire transfers) and Amazon, iTune ,Verizon, etc gift cards, for medicine, religious practices, and leaves to come home, internet access, complete job assignments, help sick friend, get him out of trouble, or anything that sounds fishy.The military does provide all the soldier needs including food medical Care and transportation for leave. Trust me, I lived it, you are probably being scammed. I am just trying to show you examples that you are most likely being connned.Below is an email response I received after I sent an inquiry to the US government when I discovered I was scammed. I received this wonderful response back with lots of useful links on how to find and report your scammer. And how to learn more about Romance Scams.Right now you can also copy the picture he gave you and do a google image search and you will hopefully see the pictures of the real person he is impersonating. this doesn't always work and take some digging. if you find the real person you can direct message them and alert them that their image is being used for scamming.Good Luck to you and I'm sorry this may be happening to you. please continue reading the government response I received below it's very informative.   You have contacted an email that is monitored by the U.S. Army Criminal Investigation Command. Unfortunately, this is a common concern. We assure you there is never any reason to send money to anyone claiming to be a Soldier online. If you have only spoken with this person online, it is likely they are not a U.S. Soldier at all. If this is a suspected imposter social media profile, we urge you to report it to that platform as soon as possible. Please continue reading for more resources and answers to other frequently asked questions:  How to report an imposter Facebook profile: Caution-https://www.facebook.com/help/16... < Caution-https://www.facebook.com/help/16... >   Answers to frequently asked questions:  - Soldiers and their loved ones are not charged money so that the Soldier can go on leave.  - Soldiers are not charged money for secure communications or leave.  - Soldiers do not need permission to get married.  - Soldiers emails are in this format: john.doe.mil@mail.mil < Caution-mailto: john.doe.mil@mail.mil > anything ending in .us or .com is not an official email account.  - Soldiers have medical insurance, which pays for their medical costs when treated at civilian health care facilities worldwide – family and friends do not need to pay their medical expenses.  - Military aircraft are not used to transport Privately Owned Vehicles.  - Army financial offices are not used to help Soldiers buy or sell items of any kind.  - Soldiers deployed to Combat Zones do not need to solicit money from the public to feed or house themselves or their troops.  - Deployed Soldiers do not find large unclaimed sums of money and need your help to get that money out of the country.  Anyone who tells you one of the above-listed conditions/circumstances is true is likely posing as a Soldier and trying to steal money from you.  We would urge you to immediately cease all contact with this individual.  For more information on avoiding online scams and to report this crime, please see the following sites and articles:   This article may help clarify some of the tricks social media scammers try to use to take advantage of people: Caution-https://www.army.mil/article/61432/< Caution-https://www.army.mil/article/61432/>   CID advises vigilance against 'romance scams,' scammers impersonating Soldiers  Caution-https://www.army.mil/article/180749 < Caution-https://www.army.mil/article/180749 >   FBI Internet Crime Complaint Center: Caution-http://www.ic3.gov/default.aspx< Caution-http://www.ic3.gov/default.aspx>   U.S. Army investigators warn public against romance scams: Caution-https://www.army.mil/article/130...< Caution-https://www.army.mil/article/130...>   DOD warns troops, families to be cybercrime smart -Caution-http://www.army.mil/article/1450...< Caution-http://www.army.mil/article/1450...>   Use caution with social networking  Caution-https://www.army.mil/article/146...< Caution-https://www.army.mil/article/146...>    Please see our frequently asked questions section under scams and legal issues. Caution-http://www.army.mil/faq/ < Caution-http://www.army.mil/faq/ > or visit Caution-http://www.cid.army.mil/ < Caution-http://www.cid.army.mil/ >.  The challenge with most scams is determining if an individual is a legitimate member of the US Army. Based on the Privacy Act of 1974, we cannot provide this information. If concerned about a scam you may contact the Better Business Bureau (if it involves a solicitation for money), or local law enforcement. If you're involved in a Facebook or dating site scam, you are free to contact us direct; (571) 305-4056.   If you have a social security number, you can find information about Soldiers online at Caution-https://www.dmdc.osd.mil/appj/sc... < Caution-https://www.dmdc.osd.mil/appj/sc... > . While this is a free search, it does not help you locate a retiree, but it can tell you if the Soldier is active duty or not.  If more information is needed such as current duty station or location, you can contact the Commander Soldier's Records Data Center (SRDC) by phone or mail and they will help you locate individuals on active duty only, not retirees. There is a fee of $3.50 for businesses to use this service. The check or money order must be made out to the U.S. Treasury. It is not refundable. The address is:  Commander Soldier's Records Data Center (SRDC) 8899 East 56th Street Indianapolis, IN 46249-5301 Phone: 1-866-771-6357  In addition, it is not possible to remove social networking site profiles without legitimate proof of identity theft or a scam. If you suspect fraud on this site, take a screenshot of any advances for money or impersonations and report the account on the social networking platform immediately.  Please submit all information you have on this incident to Caution-www.ic3.gov < Caution-http://www.ic3.gov > (FBI website, Internet Criminal Complaint Center), immediately stop contact with the scammer (you are potentially providing them more information which can be used to scam you), and learn how to protect yourself against these scams at Caution-http://www.ftc.gov < Caution-http://www.ftc.gov > (Federal Trade Commission's website)