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See the 'Forum help' thread entitled 'Using forums during exam period' for further information. You must not discuss any of the current exams until the last exam has been sat. Hi, I was hoping someone could shed some light on an issue I have regarding mortality options. I have searched the acted forums and though questions have been asked before regarding this issue I still can't seem to grasp the concept.

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For the North American method, if the average mortality of non-option takers and option takers after the option is ultimate we can take a shortcut and only consider the value of option itself. For example April , question 6. Firstly, is my understanding of this correct? If so, what I don't understand is why we can do this?

Why can't we use the full method? I tried using the full method for the past paper question and got a different answer. What does the difference in the cost from doing it the full way or the shortcut represent? Then the process looks like this:. I'll take a stab at it. The procedure of carrying can always be understood in the way I indicate here.

If we have to subtract too much from a particular digit then we can borrow from higher digits by taking one of the first larger digit and breaking it up for the smaller digits. Of course, there are more cases I have not discussed A second view: my wife had this comment.

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How to explain to children? My way is wrong. Perhaps we could think of this as a series of banks from which each level can only borrow from the level immediately above. Sign up to join this community. The best answers are voted up and rise to the top.

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Home Questions Tags Users Unanswered. How to explain - 1 using the american method Ask Question. Asked 5 years, 2 months ago.

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Active 5 years, 2 months ago. Viewed 1k times. I have learnt the Austrian method when I was little, Bavaria had switched to the American method something like 20 years ago. This was discussed here in Germany quite a bit. I didn't have an opinion until I made this App, but now I must say, the Austrian method is "better".

This recursive borrowing thing, regardless if it is a hidden repeat until, is quite hard to understand for kids. I will roll out an update soon. The number that comes just before is Sperm awareness got a boost in , when a meta-analysis showed that sperm counts of men from the U.

But what is Method Acting?

The study was widely framed as a potential crisis in male fertility, sparking some men to consider their sperm functionality more deeply—or just consider it at all. Recent population surveys have shown that many men do want more birth-control options.

Others sit in a hot tub every day. It seems to be working: A major clinical trial for a hormonal gel began late last year. It sounds woefully apropos that scientists and entrepreneurs are convincing guys to learn about reproductive responsibility by appealing to their sexual pleasure—particularly at a time when some U. Yet more options and knowledge for preventing pregnancy are good things for everyone.

After all, nearly half of all pregnancies in the U. Nearly 40 percent of women are not satisfied with the birth-control method they are currently using, according to the Guttmacher Institute.

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When people dislike their contraception for whatever reason—including health side effects from the pill or the tactile compromises of condoms— they are less likely to use it correctly and consistently. One day, if the pharmaceutical industry decides to reverse course and fund the development of innovative birth control, we could get genetic tests and other technologies to help people of both sexes figure out what kind of contraception might work best for our individual physiologies and ways of life.

With a personalized-medicine approach, imagine if birth control could be catered to the specific needs and priorities of an individual.

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In some cases, the task of preventing pregnancy could be truly shared between a couple. What if a man—my boyfriend, for instance—could undergo a preejaculate sperm evaluation? If so, my boyfriend and I might scientifically resolve the final variable in our birth-control efficacy. We use coitus interruptus 1 during my fertile window, the weeklong span during which his sperm can potentially fertilize my egg.

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An egg is only viable for fertilization for up to 24 hours per menstrual cycle, and sperm can survive in the female body for up to five days. I determine this window using a technique called the symptothermal method, a means of avoiding pregnancy that involves meticulously tracking changes in cervical fluid and basal-body temperature in order to predict, and then confirm, when ovulation occurs. We devised this contraception strategy based on our personal risk-benefit analysis and combined physiologies—and it has worked for us so far.

Frustrated by the paltry research, I decided to conduct an experiment myself.

Method acting

The Trak test, while approved by the Food and Drug Administration, is not designed for testing preejaculate. Nor is it intended to be used as form of pregnancy prevention. First, we did a control test to get a sense of his sperm baseline. After 48 hours of abstinence the minimum length of time for proper semen analysis, according to the WHO , he proffered a five-milliliter ejaculation sample.

My boyfriend stared down the engine until it beeped to signal its finish, recalling the way women glare at pregnancy tests while awaiting the results. The hallowed pages of Scientific American are not the place to describe how we collected a full milliliter of unadulterated preejaculate.

I will say that our methodology was informed by the science of arousal, a commitment to rigorous research standards and an abundance of humor. Per the discussions of methodology in the academic studies, we knew it was critical to collect only preejaculate. The authors of the Thai paper wrote that study volunteers might have smeared semen on the collection slides instead of preejaculate, which could mean the number of preejaculate samples that were found to contain sperm was artificially high.