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    Assessing risk

  • Epidemiological Studies : We are constantly exposed to different risks that have become inherent in our socio-technical circumstances. These ongoing, unintentional experiments are exploited through epidemiological studies which are designed to measure the correlation between exposure to risk factors and the occurrence of harm. For example, are those living close to EMFs (electro-magnetic fields generated by technologies like electrical power lines) susceptible to certain harms like leukemia? An epidemiological study would compare incidents of this disease occurring in a population exposed to EMFs with incidents of this disease occurring in a population, unexposed to EMSs. If there were a significant risk ratio (usually set at three times the incidents of the harm in the unexposed, control group) then this provides evidence that exposure to EMFs somehow causes leukemia. (Further study would be required to confirm this hypothesis and uncover the causal mechanism by which exposure produces the harm.) Epidemiological studies are difficult to carry out and are always accompanied by uncertainty due to the limitations of the methods employed. Typically, the harm may take years to become manifest after exposure. Finding a population stable enough to determine the effects of long term exposure is difficult because individuals frequently move from place to place. Such natural experiments also bring with them a great deal of "noise"; factors other than EMFs could be causing leukemia or EMFs could be interacting with other elements in the environment to cause the harm. Finally, there is the Tuskegee factor. In the notorious Tuskegee experiment, doctors refused to treat African Americans for syphilis in order to study the long term progression of the disease. Exposing a population to a risk factor without informing them of the potential harm in order to gain scientific information violates the right of free and informed consent and the duty not to harm.
  • Animal Bioassays : Risk information can often be obtained by exposing animals to the risk factor and checking for emerging harms. While useful, animal bioassays are subject to several problems. Experimenting on animals raises many of the same ethical concerns as experimenting on humans. Utilitarians argue that animals merit moral consideration because they are sentient and can suffer. Animal experiments are thus subject to the three Rs: reduce, refine, and avoid replication. (See Bernard Rollins) Second, these experiments create two kinds of uncertainty. (a) Projections from animal to human physiology can lead researchers astray because of the differences between the two; for example, animals are more sensitive to certain harms than humans. (b) Projecting the results from intensive short term animal exposure into the long term can also introduce errors and uncertainty. Thus, as with epidemiological studies, there are uncertainties inherent in animal bioassays.
  • Risk assessment, while useful, is burdened with uncertainty due to the limits of what we know, what we can know, and what we are able to learn within the ethical parameters of human and animal experimentation. Crucial ethical issues arise as we decide how to distribute this uncertainty. Do we place its burden on the risk taker by continuing with a project until it is proven unsafe and harmful? Or do we suspend the activity until it is proven safe and harm-free. The first gives priority to advancing risky activities. The second gives priority to public safety and health, even to the point of suspending the new activities under question.

Questions & Answers

show that the set of all natural number form semi group under the composition of addition
Nikhil Reply
what is the meaning
Dominic
explain and give four Example hyperbolic function
Lukman Reply
_3_2_1
felecia
⅗ ⅔½
felecia
_½+⅔-¾
felecia
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
x*x=2
felecia
2+2x=
felecia
×/×+9+6/1
Debbie
Q2 x+(x+2)+(x+4)=60 3x+6=60 3x+6-6=60-6 3x=54 3x/3=54/3 x=18 :. The numbers are 18,20 and 22
Naagmenkoma
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
16
Makan
x=16
Makan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
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Source:  OpenStax, Civis project - uprm. OpenStax CNX. Nov 20, 2013 Download for free at http://cnx.org/content/col11359/1.4
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