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Topic: Gompertz


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In the News (Sun 3 Jun 12)

  
  Document
The most important difference between the Gompertz and Weibull models is that the increase in mortality that resuits from senescence is a multiple of the initial mortality rate in the first case and is independent of the initial mortality rate in the second case.
Suppose that the aging parameters gamma (Gompertz) and alpha and beta (Weibull) represent intrinsic physiological changes in the organism that presumably are independent of most extrinsic causes of mortality in the environment.
Accordingly, the Gompertz model predicts that the increase in mortality rate as a function of age should diminish in proportion to the decrease in m^sub 0^.
www.umsl.edu /~ricklefs/Reprints/RS2002.htm   (3125 words)

  
 benjamin gompertz
The Gompertz family were merchants who – like many others in the late 1700s – left Holland to try their luck in a London booming with trade.
Gompertz himself joined the stock exchange in 1810 and became a Fellow of the Royal Society in 1819.
Gompertz was now marrying his mathematical brilliance to the cold science of insurance, and in 1824 he was appointed as actuary and head clerk of the Alliance Assurance Company.
www.eastlondonhistory.com /gompertz.htm   (992 words)

  
 Benjamin Gompertz - Wikipedia, the free encyclopedia
Gompertz is today mostly known for his Gompertz's law of mortality, a demographic model published in 1825.
It was used by insurance companies to calculate the cost of life insurance.
Gompertz's descendent Simon Gompertz is an economics presenter for the BBC.
en.wikipedia.org /wiki/Gompertz   (195 words)

  
 Guest Features - GantsehMegillah.com
For now, the events of Sept. 11 — which came as Gompertz was sitting at his kitchen table, reading the newspaper — remain a whirl of disconnected, nightmarish fragments.
Gompertz remained in his apartment for almost two days, until his son — who first was told that Gompertz had been evacuated to a New Jersey shelter — came in to rescue him.
The experience "brings me back to November 9," Gompertz says several weeks later in an interview with JTA at the Tribeca hotel where he is staying temporarily.
www.pass.to /tgmegillah/zoomfeatures.asp?id=34   (637 words)

  
 Belle 8.3   (Site not responding. Last check: 2007-10-13)
The use of Gompertz age-specific mortality rate analyses can be used in phenomenological mathematical models to separate out the contributions of CR and hormesis on the lifetime mortality of a group of animals.
Since CR and chronic toxicity displace the linear Gompertz function in opposite directions (CR decreases the slope; chronic toxicity increases the slope), laboratory animals experiencing inanition from chronic exposure to a toxic substance may benefit from the health effects of the CR ­ thus clouding the interpretation of the study.
A Gompertz age-specific mortality rate model of toxicity from short term neutron whole-body exposure to fission neutrons in rats.
www.belleonline.com /n8v83.html   (1369 words)

  
 Gompertz   (Site not responding. Last check: 2007-10-13)
Gompertz applied the calculus to actuarial questions and he is best remembered for Gompertz's Law of Mortality.
[Gompertz's] rigid adherence to Newton's fluxional notation prevented wide recognition of his accomplishment, but he must be rated as a pioneer in actuarial science and one of the great amateur scholars of his day.
Gompertz assisted Baily in calculating positions of stars which was eventually published as Baily's Catalogue giving the constants for 3000 fixed stars.
www-history.mcs.st-andrews.ac.uk /history/Mathematicians/Gompertz.html   (859 words)

  
 Chrismukkah News   (Site not responding. Last check: 2007-10-13)
Gompertz, who is Jewish, and his wife, Michelle, who is the daughter of a Protestant minister, were inspired by an episode of Fox's "The OC" in which Seth Cohen coins the phrase describing his interfaith family's Christmas and Hanukkah traditions.
Gompertz, who is Jewish and married to the daughter of a Protestant minister, says he thinks some of "The OC's" Chrismukkah new merchandise looks a little too much like his own designs, such as the matzo ball snowman and a candy-cane menorah.
Gompertz says that he and his wife have tried to be low key so as not to offend those who take their holidays seriously.
www.chrismukkah.com /misc/news.tpl   (8806 words)

  
 Longevity First: June 2005 Archives   (Site not responding. Last check: 2007-10-13)
Gompertz Law is a formulation of an interesting fact about aging and death.
The standard definition of the rate of aging of a population is the slope of its Gompertz regression.
This means that in order to add 7–8 years to someone’s lifespan, the Gompertz Curve must be shifted down by lowering one’s mortality rate at all ages by at least 50% (in practice, it must be lowered even further, depending on the age of the person).
www.longevityfirst.org /archives/2005/06   (1359 words)

  
 The Hutton Inquiry: reformatted transcripts
MR GOMPERTZ: Would you look, please, at MoD/1/25, which is the second page of your note of the interview of 4th July.
MR GOMPERTZ: Indeed, when Dr Kelly wrote his letter Dr Wells thought that it should be sent on or thought that it should be considered for sending on in relation to that leak inquiry.
MR GOMPERTZ: Going back to MoD/1/50, please, is this accurate as to what he was told: "Hatfield said that although Kelly was not named in the press release his identity may become known in due course." Is that an accurate account of what was said to Dr Kelly at the end of that interview?
www.hutton.softblade.com /transcripts.php?action=transcript&session=37   (9576 words)

  
 CRYONICS Gompertz and Fruit Flies
One is the slope of the other, and to get at one from the other, you need a bit of math, and the two functions should be clearly kept separate when talking about aging, so as not to confuse.
Benjamin Gompertz was an insurance actuary who in 1825 noticed that your risk of dying in any given year increased exponentially with time.
If other non-time dependent stuff is left out (getting bombed in a war, or starving, or dying of plague, or getting eaten by wild animals), this equation should (when integrated and graphed) produce a pretty good look at what aging in the absence of external causes looks like, in terms of population survival.
www.cryonet.org /cgi-bin/dsp.cgi?msg=1450   (549 words)

  
 Dr. John Gompertz -- avid Cal booster   (Site not responding. Last check: 2007-10-13)
Gompertz was a leader in medical societies and an avid booster of the Cal Bears as well as an important financial contributor to the campus.
Gompertz served as a president of the American Lung Association at several levels: Alameda County, the state and the nation.
He is survived by his son, the Rev. Charles Gompertz of Nicasio; two daughters, Jody Cooper of Nicasio and Peggy Huntington Merritts of Piedmont; 11 grandchildren; and seven great-grandchildren.
www.sfgate.com /cgi-bin/article.cgi?f=/c/a/2004/11/23/BAGM9A005N1.DTL   (544 words)

  
 Rolf Gompertz   (Site not responding. Last check: 2007-10-13)
Rolf Gompertz has written a number of books, short stories and articles dealing with Jewish themes in particular and spiritual themes in general.
Gompertz and his wife, Carol, live in North Hollywood, Calif. and are the parents of three adult children.
Gompertz was profoundly affected by his return and wrote a series of articles dealing with these experiences.
www.net101.com /worddoctor/religion/rolf.html   (397 words)

  
 Benjamin Gompertz -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-13)
Gompertz is today mostly known for his Gompertz's law of mortality, a (A statistic characterizing human populations (or segments of human populations broken down by age or sex or income etc.)) demographic model published in 1825.
It was used by insurance companies to calculate the cost of (Insurance paid to named beneficiaries when the insured person dies) life insurance.
Gompertz's descendent Simon Gompertz is an (The branch of social science that deals with the production and distribution and consumption of goods and services and their management) economics (An advocate who presents a person (as for an award or a degree or an introduction etc.)) presenter for the BBC.
www.absoluteastronomy.com /encyclopedia/B/Be/Benjamin_Gompertz.htm   (246 words)

  
 BBC NEWS | Politics | Key points: Kelly family's QC
Mr Gompertz said the Kelly family was "deeply hurt and angered" by evidence given by Richard Hatfield, the MoD director of personnel.
Mr Gompertz pointed to the "contribution of the culture of the media" to Dr Kelly's death.
Mr Gompertz pointed to the conduct of "some of the photographers" for their part in the "harassment of Dr Kelly before his death and the family after it".
news.bbc.co.uk /1/hi/uk_politics/3138334.stm   (1737 words)

  
 David Herrle reviews A JEWISH NOVEL ABOUT JESUS by Rolf Gompertz
For instance, Gompertz introduces the Sadducees and the Pharisees, their leadership roles, their differences, their approaches to the Torah, and so on.
Gompertz minces no words about Pilate, though he also admits Caiaphas' faults.
My three favorite subjects in AJNAJ are the history of the Temple (from Moses’ tabernacle to the Maccabees' restoration after Epiphanes), Jesus' showdown with the Pharisees (when he calls them "blind guides"), and the Passover procedure (the Seder, Jesus sitting in the cup of Elijah's stead, etc.).
www.subtletea.com /ajewishnovelaboutjesusreview.htm   (1479 words)

  
 Guardian Unlimited Politics | Special Reports | Hoon accused of hypocrisy as family reacts to MoD claims
Mr Gompertz said Mr Hatfield's remarks were seen by the family "as the arrogant dismissal of Dr Kelly as the author of his own misfortune".
Mr Gompertz said: "The family invite the inquiry to find that the government made a deliberate decision to use Dr Kelly as part of its strategy in its battle with the BBC." This involved a strategy of putting him in front of two committees of MPs in order to undermine Gilligan's reporting.
In his conclusion, Mr Gompertz said: "The government and the nation have lost their greatest expert in biological weapons of mass destruction, yet he was characterised by his employers to suit their needs of the hour as a middle ranking official and used as a pawn in their political battle with the BBC."
politics.guardian.co.uk /kelly/story/0,13747,1049991,00.html   (1098 words)

  
 GROWTH CURVE MODELLING - Smart Module
The Gompertz curve is a limiting case of the generalised logistic as T becomes very small or very large.
The Gompertz curve can be thought of as a limiting version of the generalized logistic (i.e.
The data and the Genstat code, which fits growth curves for each experimental unit and forms a table of the medians for each of the five parameters of the Gompertz curve, is provided here.
www.bioss.sari.ac.uk /smart/unix/mgrow/slides/frames.htm   (770 words)

  
 TEMI March 2001 Newsletter   (Site not responding. Last check: 2007-10-13)
We spoke about when to use each curve, noting that the Gompertz curve is typically applied to forecasts of absolute technical performance while the Pearl-Reed formulation is often more appropriate when one can make the case that the progress already achieved stimulates further advance.
We work with the Pearl-Reed and Gompertz curves because we make the case that their parameters adequately model the process of technological advance.
For the Gompertz curve, we would need to take the logs of both sides of the equation twice.
www.temi.com /Newsletter/Mar01/TechTrends3.html   (873 words)

  
 Rolf Gompertz   (Site not responding. Last check: 2007-10-13)
Rolf Gompertz is a seasoned professional, with more than 35 years as a reporter, editor, writer and public relations practitioner to his credit.
Prior to starting his own company in 1987, Gompertz was on staff with the National Broadcasting Company (NBC) for 30 years, first as a publicist and then, from 1983-1987, as a publicity director in the company's West Coast Press & Publicity Department.
Gompertz is a senior instructor at UCLA Extension, where he has taught since 1974.
www.net101.com /worddoctor/pr/rolf.html   (284 words)

  
 Rolf Gompertz Author of the Month, MyShelf.com
Rolf Gompertz manages to examine the doubts and questions we have all felt when reading the story of Abraham and the near sacrifice of his son, Isaac.
Gompertz uses time-honored midrash-- the telling or retelling of a legend-- to achieve that end.
As Gompertz examines the possible motivations for the actions of the characters, the Biblical tale comes to life for even a casual reader looking for a good read.
www.myshelf.com /aom/02/gompertz.htm   (3503 words)

  
 Olshansky and Carnes, Ever Since Gompertz   (Site not responding. Last check: 2007-10-13)
Gompertz: derived a formula (in 1825) describing the exponential rise in death rates between sexual maturity and old age.
Gompertz and Makeham set the stage for improved methods…for example, radiation exposure to test “accelerated senescence” (6) --> significant because it was a physiologically based level of analysis…led to the lethality function calculated for species exposed
Gompertz equation/distribution one of the major quantitative tools used in analyzing failure times for living and mechanical organisms…his law of mortality and biological roots verified
ssr1.uchicago.edu /NEWPRE/Pop2/OlshanskyCarnes.html   (444 words)

  
 Longevity First: Cashing in on Protandim   (Site not responding. Last check: 2007-10-13)
Another factor in regards to the Gompertz curve is to ask, "When does aging begin?" My current thinking is that while birthdays mount up, aging doesn't begin till the growth years are over, at about 18 years for humans.
Apparently, some long-lived human populations, being oblivious of the Gompertz curve, have proceeded to achieve near-super longevity without the aid of science.
It is assumed that the only affect is to shift the Gompertz curve, and not change it's slope.
longevityfirst.org /archives/2005/06/cashing_in_on_p_1.html   (2655 words)

  
 Oy Joy! Merry Chrismukkah
Then Ron and Michelle Gompertz watched the 2003 episode of the hip teen soap "The O.C." in which anti-hero Seth Cohen explained the holiday ground rules in his interfaith family.
The Gompertz clan made some cards for family and friends and claimed the rights to the www.Chrismukkah.com domain.
The problem for mixed-marriage families such as his, said Rod Gompertz, is that "The Holidays" have already been sliced, diced and secularized in the public square.
tmatt.gospelcom.net /column/2004/12/01   (673 words)

  
 The Gompertz equation
However we chose to approach this model from a differential equation of the form (25) since we can a priori determine information about the constant parameters according to how the curve behaves for large values of t.
Since real-world populations do not fit a particular curve in an exact manner, to derive a Gompertz curve from such a small number of data points that correspond to such a population will yield a curve that holds a greater potential for error for values of t that are large in magnitude.
To determine a Gompertz equation from these points, we must derive the values of A and B that are defined by the two equations
www.mathcs.emory.edu /ccs/ccs215/model/node8.html   (1211 words)

  
 Programming Fundamentals   (Site not responding. Last check: 2007-10-13)
You are to write a Java class gompertz.java and accompanying documentation file lab02.txt to allow the calculation of the size of a population at a particular time.
The Gompertz Growth Function comes from the biological sciences area and is a formulation that describes the growth of a population across time in an environment where there are limits to the size the population can reach.
The following figure shows a typical Gompertz growth function (note the characteristic inflection point), for a fixed value of b and c and varying time.
www.cs.adfa.edu.au /~pf/labs/assignment02.html   (724 words)

  
 Biomathematics 301 Study Questions
Here, r for the logistic equation was chosen to have the same expected time until 50 individuals were present in the population (19 generations).
Challenge: A global solution to the Gompertz equation can be found by making a substitution of variables from n to y, using y=ln(n/K).
Make these substitutions into the Gompertz equation, simplify, and integrate the resulting equation to obtain the general solution for the population size at all future times.
www.zoology.ubc.ca /~bio301/Bio301/Review/FinalReview/Question4.html   (170 words)

  
 Cumulative Reliability for the Gompertz Model   (Site not responding. Last check: 2007-10-13)
Find the Gompertz reliability growth curve using the results of the first 15 launches.
Table 4 (Gompertz Model)- Comparison of the predicted reliabilities with the actual data.
Table 5 (Gompertz Model)- Missile launch data and their analysis for determining the parameters of the Gompertz reliability growth curve.
www.weibull.com /RelGrowthWeb/cumulative_reliability.htm   (299 words)

  
 Gompertz, 80, furrier to the stars and B.P.C. resident
A furrier for many years, he was renowned in the fashion world in the 1960s for creating “fun furs” that appealed to youth and celebrities, counting among his customers the international model Twiggy, Barbra Streisand and Lauren Bacall and prominent political women including Ethel Kennedy and the wife of Mayor John Lindsay.
Leo Gompertz rejoined the family in the Netherlands in 1939 and came with them to New York, where he established a fur business, first in Washington Heights and then in the fur district in Midtown, said Ron.
Fred Gompertz graduated from Fashion Institute of Technology around 1960 and began making rabbit and fox fur coats and jackets dyed in non-traditional colors, attracting the attention of Twiggy and other fashion world figures.
www.downtownexpress.com /de_52/gompertz80furrier.html   (822 words)

  
 The Influence of Genes on the Aging Process of Mice: A Statistical Assessment of the Genetics of Aging -- de ...
The Gompertz equation was used to model the aging process: R
Gompertz curves obtained using an MLE approach were also less
Lines represent estimated adult mortality trajectories based on Gompertz parameters for wild-type (straight lines) and experimental (dashed lines) conditions.
www.genetics.org /cgi/content/full/169/1/265   (5190 words)

  
 RedNova News - Oddities - Merry Chrismukkah: Cards Combine Holidays   (Site not responding. Last check: 2007-10-13)
Ron Gompertz founded the company this year with his wife, inspired by an episode of the popular Fox series "The O.C." in which Seth Cohen, a character whose mother is Protestant and father is Jewish, coins the term.
Gompertz is Jewish and from New York City.
Cardmakers say similarities between the two holidays, and the strong secular side of each is what makes combining them possible, something not necessarily true of any other season.
www.rednova.com /news/display?id=106524   (840 words)

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