던바의 수(Dunbar’s number)

당신의 우주기지(starbase)는 거의 완성되었고, 이제 광석(ore) 몇 톤만 있으면 된다. 당신은 오후에 소행성 광산(asteroid field)에서 광석을 캐낼 수도 있지만, 누군가가 광석을 싸게 판매한다는 소식을 들었다. 그래서 당신은 동맹군에게 메시지를 보내고, 당신의 인맥을 이용하여 모임을 주선한다. 이처럼 가상공간에서도 친구를 가진다는 것은 좋은 일이다.  온라인 SF 게임은 인간의 행동을 연구하는 데 이상적인 수단은 아니지만, 물리학자인 스테판 서너는 “가상세계에서…

행성 발견에 도움이 된 티티우스 수열

국제천문연맹(IAU)은 2006년 8월 24일 IAU 총회에서 태양계 안에 있는 천체에 한하여 행성을 다음과 같이 정의하였다. 1. 태양 주위를 돈다. 2. 충분한 질량을 가져서 정역학적 평형을 이루며, 구형에 가까운 형태를 가지고 있다. 3. 주변 궤도의 천체에서 지배적인 위치를 차지한다. 이 조건을 모두 만족시키는 태양계의 행성은 수성, 금성, 지구, 화성, 목성, 토성, 천왕성, 해왕성의 여덟 개이다. 그러나…

How to Study Mathematics

Before I get into the tips for how to study math let me first say that everyone studies differently and there is no one right way to study for a math class.  There are a lot of tips in this document and there is a pretty good chance that you will not agree with all…

Learn From Your Errors

This is probably one of the more important sections here and also one of the most over looked.  Learning from your mistakes can only help you. Review Homework.  When you get your homework back review it looking for errors that you made. Review Exams.  Do the same thing with exams. Understand the Error.  When you…

Taking an Exam

Taking exams is probably one of the most important things that you’ll do in a math class and so it’s important to do the best that you can.  Here are some ideas that will help you while you’re taking an exam. RELAX!!!  This is the first step to successfully taking an exam.  Unfortunately, it’s also…

Studying for Exams

Here are some tips on studying for exams. Start on Day One.  You should always be studying for the next exam.  Do a little each day, or at the very least start studying 2  3 days before the exam.  Do NOT start studying the night before the exam.  Cramming, while a time honored college tradition, just…

Problem Solving

In the previous section there were some general tips in regards to homework sets as a whole.  Here are some tips to help you actually work the problems.  Note that some of the ideas were important enough that they are actually in both sections. Read the Problem.  Read the problem to get an idea of…

Homework

Note that this section contains some general tips on making the most out of your homework.  The next section contains tips on actually working homework problems. Understand the Purpose of Homework.  Instructors do not give you homework assignments to make your life miserable (well some might, but most don’t!).  Homework assignments are given to help…

Getting Help

Getting help when you are in trouble is one of the most important things that you can do in a math class.  Here are a couple of things that you can do the get help. Get Help When You Need It.  Do not wait until the last minute to get help.  When you start running…