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| Registros recuperados: 97 | |
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| Krupnick, Alan J.; Alberini, Anna; Cropper, Maureen L.; Simon, Nathalie B.; O'Brien, Bernie; Goeree, Ron; Heintzelman, Martin. |
| Much of the justification for environmental rulemaking rests on estimates of the benefits to society of reduced mortality rates. This research aims to fill gaps in the literature that estimates the value of a statistical life (VSL) by designing and implementing a contingent valuation study for persons 40 to 75 years of age, and eliciting WTP for reductions in current and future risks of death. Targeting this age range also allows us to examine the impact of age on WTP and, by asking respondents to complete a detailed health questionnaire, to examine the impact of health status on WTP. This survey was self-administered by computer to 930 persons in Hamilton, Ontario, in 1999. The survey uses audio and visual aids to communicate baseline risks of death and... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Mortality risk valuation; Canada; Contingent valuation; Age; Health status; Risk and Uncertainty; I1; Q20; Q26. |
| Ano: 2000 |
URL: http://purl.umn.edu/10888 |
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| Fried, Harold O.; Tauer, Loren W.. |
| This paper is about aging and the ability to perform under pressure on the PGA tour. Performance increases with golfing skill, but may first increase and then decrease with age as experience interacts with changes in physical condition. Similarly, mental fortitude or the ability of a golfer to perform under pressure may first increase and then decrease with age as experience interacts with changes in the ability to concentrate. Net performance on the tour is the result of both physical golfing skill and the ability to perform under pressure. We control for changes in physical skill and focus on the mental side of the game. The role of experience suggests an inverted U shaped relationship between age and mental performance that could vary significantly... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Age; Efficiency; Order-m FDH; Golf; Performance under pressure; Productivity Analysis. |
| Ano: 2009 |
URL: http://purl.umn.edu/51103 |
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| Lim, So Yeong; Chen, Susan E.; Waldorf, Brigitte S.. |
| This study examines Food Stamp Program (FSP) participation patterns with an emphasis on macroeconomic effects and age differences. Entry into and exit out of the program are examined with data from the Survey of Income and Program Participation 2004 panel using probit techniques. The results indicate that young adults easily enter the FSP but quickly move out. Older people are hesitant to enter the FSP but they stay on longer compared to their younger counterparts. The estimation results confirm the common belief that economic dynamics and FSP participation are negatively related. When the unemployment rates rise, the likelihood of entry and continuation on food stamps increases. This study also documents that the macroeconomic effects on FSP transitions... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Food stamps; Age; Macroeconomy; Transition; Agricultural and Food Policy; Food Security and Poverty; I38; J64. |
| Ano: 2011 |
URL: http://purl.umn.edu/108558 |
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| Itaoka, Kenshi; Krupnick, Alan J.; Akai, Makoto; Alberini, Anna; Cropper, Maureen L.; Simon, Nathalie B.. |
| A contingent valuation survey was conducted in Sizuoka, Japan, to estimate the willingness to pay (WTP) for reductions in the risk of dying and calculate the value of statistical life (VSL) for use in environmental policy in Japan. Special attention was devoted to the effects of age and health characteristics on WTP. We find that the VSLs are somewhat lower (103 to 344 million yen) than those found in the virtually identical survey applied in some developed countries. These values were subject to a variety of validity tests, which they generally passed. We find that the WTP for those over age 70 is lower than that for younger adults, but that this effect is eliminated in multiple regression. Rather, when accounting for other covariates, we find that WTP... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Willingness to pay; Value of statistical life; Mortality risk; Contingent valuation; Age; Risk and Uncertainty. |
| Ano: 2005 |
URL: http://purl.umn.edu/10829 |
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| Krás,RV; Kessler,A de M; Ribeiro,AML; Henn,JD; Bockor,L; Sbrissia,AF. |
| In this study, 360 male broilers, out of which 240 of a fast-growing strain (Cobb500), and 120 of a slow-growing strain (Label Rouge), were used to evaluate the effect of dietary fiber on digesta transit time and digestive metabolism during the period of 1 to 42 days of age. A completely randomized experimental design with a 3x2 factorial arrangement was applied, consisting of three groups of birds (slow-growing - SG; fast-growing fed ad libitum - FGAL; and fast-growing pair-fed with SG broilers - FGPF) and two iso-protein diets (a 3100 kcal ME/kg low-fiber diet - LFD- and a 2800 kcal ME/kg high-fiber diet - HFD- with 14% wheat bran and 4% oat hulls). HFD-fed birds presented lower ME retention (p < 0.001) and lower dry matter metabolizability (DMM) (p... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Fiber; Metabolism; Pair-fed; Strain. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200003 |
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| Ozenturk,U; Yildiz,A. |
| ABSTRACT This study aimed to compare the eggs of the native-Turkish Atak-S (A-S) hybrid and the foreign brown layer Isa Brown (IB) and white layer Novogen White (NW) hybrids reared in two different cage densities (468.75 cm2/hen and 312.50 cm2/hen) in terms of the internal and external quality parameters of the eggs. A total of 540 hens including 180 from each genotype were used. To determine the egg quality characteristics, one randomly selected egg was taken out of each cage every 4 weeks in the yield period of 24-68 weeks, and analysis were carried out. A total of 648 eggs were used. In the study, the effect of genotype on all parameters was found to be significant. The shell thickness, Haugh unit and albumen index were lower in the Atak-S hybrid. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Atak-S; Cage density; Egg quality; Laying hens. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000300313 |
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| Shahid,I; Sharif,M; Yousaf,M; Ahmad,F; Virk,MR; Bilal,MQ; Anwar,U; Ali,A; Hussain,M; Chishti,MFA; Rahman,MA. |
| ABSTRACT The objective of this experiment was to investigate the effect of supplementation of an exogenous emulsifier (lyso-phospholipid) in the diet of growing broilers on growth performance and digestibility. A total of 1224 Ross-308 ten day old broiler chicks were distributed into two experimental treatments in such a way that each treatment had twelve replicates with fifty-one birds per replicate. Two experimental diets were formulated with and without emulsifier supplementation according to the nutrition standards of Ross 308. Feed intake and body weight gain of the broilers were measured on a daily basis and feed conversion ratio was also calculated. Nutrient digestibility was determined on the 25th day of age. Analysis of variance under completely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Additivies; Broiler chicks; Carcass; Ross 308. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100307 |
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| Ozenturk,U; Yildiz,A. |
| ABSTRACT This study aimed to compare the eggs of the native-Turkish Atak-S (A-S) hybrid and the foreign brown layer Isa Brown (IB) and white layer Novogen White (NW) hybrids reared in two different cage densities (468.75 cm2/hen and 312.50 cm2/hen) in terms of the internal and external quality parameters of the eggs. A total of 540 hens including 180 from each genotype were used. To determine the egg quality characteristics, one randomly selected egg was taken out of each cage every 4 weeks in the yield period of 24-68 weeks, and analysis were carried out. A total of 648 eggs were used. In the study, the effect of genotype on all parameters was found to be significant. The shell thickness, Haugh unit and albumen index were lower in the Atak-S hybrid. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Atak-S; Cage density; Egg quality; Laying hens. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000400313 |
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| Morais,Rosana M. de; Redaelli,Luiza R.; Sant'Ana,Josué. |
| The reproductive success of the oriental peach moth was evaluated in four experiments: 1) assessment of the mating duration, fecundity, fertility and longevity of females paired with virgin and immediately mated males; 2) mating duration, spermatophore size, fecundity, fertility and longevity in females paired with virgin and up to four times mated males; 3) receptivity of females to additional copulations after mating with virgin or mated males, and the effects of this behavior in female fecundity, fertility and longevity; 4) influence of insects age in the reproductive output. Males (33%) could copulate immediately after a previous copula. They were fertile until the fourth mating, but only in the first copula they transferred the longest (1.43 ± 0.10... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Copulations; Fertility; Oriental fruit moth. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300009 |
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| Zita,Lukas; Ledvinka,Zdenek; Tumova,Eva; Klesalova,Ludmila. |
| This investigation was carried out to evaluate certain egg quality characteristics of ISA Brown laying hens and Japanese quails (Coturnix coturnix japonica) in relation to their age. One hundred forty-four brown-egg ISA Brown laying hens and one hundred female quails were used in the study. A total of 1,678 eggs of laying hens and 2,060 eggs of Japanese quails were used during the experiment. The eggs for technological values were collected during two consecutive days in a 4-week period when the laying hens were from 20 to 60 weeks of age and the quails were from nine to 49 weeks of age. The results show that egg weight was affected by the age of the hens and quails (overall means 61.13 g and 12.52 g, respectively). Despite frequens fluctuations, as the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age; Egg quality; ISA Brown; Layers; Quails. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900016 |
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| Orsi,Mário Luís; Shibatta,Oscar Akio. |
| This work consists of age, growth, and circuli formation period determination and the relation of reproduction, temperature, and pluviosity on the growth of S. intermedius Garavello & Britski, 1990. The growth curve was adjusted by the Bertalanfy's expression and the relationship between weight and size was made by the minimum square method to determine the conditioning factor. Gonadossomatic index (IGS) was used to study the reproduction. The assintotic values for length were 33,94 cm and 44,81 cm for males and females, respectively. The circulus were formed annually and the growth was slow and the maximum age was determined to be nine years. The formation of the circuli was influenced by the reproduction, probably allied to other abiotic factors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Schizodon intermedius; Age; Growth; Tibagi river. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300009 |
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| Araujo, Caroliny Costa; Rodrigues, Kênia Ferreira; Vaz, Roberta Gomes Marçal Vieira; Conti, Ana Carolina Muller; Amorim, Aline Ferreira; Campos, Carla Fonseca Alves. |
| The objective of this work was to identify, by means of different statistical criteria the ideal nonlinear regression model to describe the growth curve of three lineages of caipira broiler for meat production. A total of 90 birds were used, being 30 birds from each of the following lineages: Pescoço Pelado, Carijó and Pesadão Vermelho. The individual body weight of broilers (1, 7, 14, 21,28, 35, 42, 49, 56, 63, 70, 77, 84 and 91 days of age) was collected weekly for determination of growth curves by means of Models von Bertalanffy, Gompertz, Logistic, Richards and Brody. The parameters of Brody model did not converge to the weight of strains. The model that better adjusted to the data was Logistic. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zootecnia e Produção Animal statistical model; Birds; Weight; Age; Lineage.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/38806 |
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| Registros recuperados: 97 | |
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