# The Angelus

Members

11

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• Gender
Male
• Exams
May 2016
• Country
Sierra Leone

## Recent Profile Visitors

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1. ## Anyone applied to Cardiff for Medicine?

Hey guys, I would like to ask if any of you applied to Cardiff for medicine. Are you aware that academic entry requirements for IB students is 776 (equivalent of A*A*A) and 38 (without ToK). This will also be the conditional offer. However for A-level students, the entry requirement is AAA. Cardiff Medical school seems to be the only UK university that equates an A-level "A" to be equivalent to an IB score of "7". All other universities equate an A to be equal to a 6. Based on this, it seems clear that Cardiff is disadvantaging IB students. Let me know if you are aware of this.
2. ## EE - t-test question: use equation or t-test calculator

HI guys, for my statistical analysis, I will be using the t-test. However, I am not sure if I should use the t-test equation to find the critical t value: or, use this online t-test calculator. The online t-test calculator would make things easier, and would also save word space, as I could just reference the calculator. But I am afraid that I will not get points for my understanding and the holistic judgement mark, since I just used a third-party resource. What do you guys think? Currently I am writing it down with the equations and comparing it to the t distribution table, but explaining this method might take up valuable word space, rather than a report from the website, which states the p value and tells me if it is extremely significant, or just barely significant, depending on the magnitude of p. Thanks, Atham EDIT: Or I can use excel, which utilizes a similar method to the online t test calculator
3. ## Differentiation challenge/problem

Yeah, I just look at the numerator. I also wanted to study physics, since many medicine applications require physics. I should have gotten that too, now I am stuck with history (although not that bad).
4. ## Differentiation challenge/problem

That was the next step in the book I was looking at. They got the second derivative to try and get the point of inflection when x''(t) = 0. I was trying to find out how they got their with the algebra and calculus. BTW, how are you doing 3 sciences? I am so envious, since in our school you can only have 2 sciences and have to have one humanity.
5. ## Differentiation challenge/problem

Yeah I did that. When I have it equal zero to find the point of inflection, I get e^-rt = (c-1). I must have done something wrong, but it is quite close. EDIT: WAIT. I think I know what I did wrong.
6. ## Differentiation challenge/problem

Hello, I am stuck on this problem right here: Find the first and second derivative of: x(t) = KC/(C + e-rt), where K, C and r are constants. Any idea on how you would do this? Is there some trick that I need to learn to be able to do this, or am I just looking at it the wrong way. Thanks in advance, Atham EDIT: Apparently the second deriv. simplifies down to -rt = ln C. I am not so sure though.
7. ## Written Task English A IA - Written Task in the format of a play/script

But since it is a written task, I do not need to perform it. I am thinking of doing a story and cutting down certain parts of it if needed. I emailed my teacher, hopefully she will answer soon. I just want to see your input.
8. ## Written Task English A IA - Written Task in the format of a play/script

Hi, I was thinking if the written task can be in the format of a play. I am planning on doing an alternative Macbeth, which takes place in modern day with the twist that it is not a kingdom but the stock market of Wall Street. I initially wanted to do a short story of Macbeth's accession to power (becoming major shareholder), but my planning was already about 800 words. Which is why I was thinking if I could do a play or a script for this. Do let me know if this is done and if it is marked well. I guess I could get the points for the format and explain it in the rationale. I want to see your thoughts on this. Thanks, Atham
9. ## IA (HL) Maths IA HL - Is the SIR model and disease spread a good topic?

Well this pretty much sets me back to square one. I was considering the SEIR model, as having the SIR as a first model, and then the SEIR model as a second model in the exploration. I was thinking of taking it the route of modelling the spread of "zombie apocalypse" but that has no practical use or anyway to prove or disprove a model. For the Hardy Weinberg principle, was that a HL IA? I am looking at the growth of tumours as well. There seem to be different types of models there. I would have to somehow derive these models for a good exploration, correct? I may need to find some patient data to justify a model. EDIT: I was looking at this article: http://ddd.uab.cat/pub/matmat/matmat_a2013/matmat_a2013a3.pdf and I thought that if I talked about vaccination and immunity that it may get a bit more complicated. However, I think I will just abandon the idea.
10. ## IA (HL) Maths IA HL - Is the SIR model and disease spread a good topic?

Since I will be using a model, I would have to somehow equate it to some real life example, right? I am unsure where to get this information however, since not all the variables I need will be available. For example, for a particular outbreak, it will be very difficult to find the statistics for the number of people that are immune, since vaccinated does not equate immune. EDIT: I found some data on ebola, but even before that I realized that the SIR is way too simplistic to be used to compare with actual data.
11. ## IA (HL) Maths IA HL - Is the SIR model and disease spread a good topic?

Hello I have been looking for topics for my Maths IA, and I plan on doing it during the Easter holidays to get it over with. I want to study medicine, and thus I wanted to choose a topic that would somehow be part of that, to show personal engagement. I looked at disease spread and found the SIR model. It involves calculus, but I am afraid that it is not indepth enough. What I was looking to do is to try to show how I derived the SIR model, then to use real data and try to create a model and compare with the real life data (although I am not sure where I could find the data for a particular disease). I also wanted to include herd immunity and how changing certain factors can change the spread of disease, such as vaccinations. I would also include the Kermack-McKendrick theory, and perhaps try to prove it to make the maths more sophisticated. I would like to ask if I am going in the right direction or what changes you would suggest to my approach. I do want to get a 7 from this, so that I can comfortably get a 7 on the exams from maths HL. I am having doubts as to where this topic is leading. Thanks, Atham
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