Successful Ageing A Survey of the Most Important Theories

Human Affairs ◽  
2008 ◽  
Vol 18 (2) ◽  
Author(s):  
Peter Tavel
Keyword(s):  
Old Age ◽  
Interaction Model ◽  
Successful Ageing ◽  
Negative Effects ◽  
Short Term ◽  
Successful Development ◽  
The Subject ◽  
Static Versus Dynamic ◽  
Disengagement Theory

Successful Ageing A Survey of the Most Important TheoriesThe issues of good and successful ageing are the subject of scientific research. Successful ageing is the attempt to achieve a state of inner satisfaction and happiness in spite of the negative effects associated with old age: loss, external and internal destabilization, etc. Successful development in old age has many forms. It can generally be defined as an attempt to achieve the greatest profit with the smallest loss. The problem is establishing the universal criteria of successful ageing. It is possible to restrict the study to the observation of individual factors which are either objective or subjective, long-term or short-term, specific or universal or static versus dynamic. The problem is creating a theory that will explain all the processes and consequences of old age—none of the theories has so far succeeded in doing this. Life satisfaction as a subjective criterion of successful ageing has been most emphasized in two contradictory theories: activity theory and disengagement theory. Other theories are: growth theories, cognitive theories, dynamic theories, SOC model, cultural anthropological theories, the interaction model of longevity, etc.

scholarly journals Kontrowersje wokół długoterminowych badań Gillesa-Erica Séraliniego nad bezpieczeństwem zdrowotnym kukurydzy GMO

2014 ◽  
Vol 12 (3) ◽  
pp. 33-54
Author(s):  
Katarzyna Lisowska ◽  
Alexander Cortez
Keyword(s):  
Safety Evaluation ◽  
Negative Effects ◽  
Short Term ◽  
Term Study ◽  
Experimental Animals ◽  
Long Term Study ◽  
Chemical Toxicology ◽  
The Subject ◽  
One Year

At the end of the year 2012, Food and Chemical Toxicology published a long-term study by Seralini et al., describing the safety evaluation of genetically modified NK603 maize and Roundup herbicide. Contrary to previous, short-term studies, this experiment revealed some negative effects of these substances on the health of experimental animals. GM feeds and Roundup generate revenue worth millions of dollars. This may be the reason why Seralini’s paper has became the subject of much heated criticism, mainly from parties linked to business and agro-biotechnology. After one year of debate, the editors of Food Chem Toxicol. decided to retract the paper, an unprecedented event given that the published article was peer-reviewed and there was no evidence of plagiarism or fraud. Here, we stress the results of Seralini’s study, discuss the methodological hints of that work and cite the commentaries on the whole situation.

Do researchers impact their study populations? Assessing the effect of field procedures in a long term population monitoring of sea kraits

2012 ◽  
Vol 33 (3-4) ◽  
pp. 365-372 ◽  
Author(s):  
Thomas Fauvel ◽  
François Brischoux ◽  
Marine Jeanne Briand ◽  
Xavier Bonnet
Keyword(s):  
Body Condition ◽  
New Caledonia ◽  
Stress Hormones ◽  
Population Level ◽  
Population Monitoring ◽  
Long Term Effects ◽  
Negative Effects ◽  
Short Term ◽  
Head Morphology

Long term population monitoring is essential to ecological studies; however, field procedures may disturb individuals. Assessing this topic is important in worldwide declining taxa such as reptiles. Previous studies focussed on animal welfare issues and examined short-term effects (e.g. increase of stress hormones due to handling). Long-term effects with possible consequences at the population level remain poorly investigated. In the present study, we evaluated the effects of widely used field procedures (e.g. handling, marking, forced regurgitation) both on short-term (hormonal stress response) and on long-term (changes in body condition, survival) scales in two intensively monitored populations of sea kraits (Laticauda spp.) in New Caledonia. Focusing on the most intensively monitored sites, from 2002 to 2012, we gathered approximately 11 200 captures/recaptures on 4500 individuals. Each snake was individually marked (scale clipping + branding) and subjected to various measurements (e.g. body size, head morphology, palpation). In addition, a subsample of more than 500 snakes was forced to regurgitate their prey for dietary analyses. Handling caused a significant stress hormonal response, however we found no detrimental long-term effect on body condition. Forced regurgitation did not cause any significant effect on both body condition one year later and survival. These results suggest that the strong short-term stress provoked by field procedures did not translate into negative effects on the population. Although similar analyses are required to test the validity of our conclusions in other species, our results suggest distinguishing welfare and population issues to evaluate the potential impact of population surveys.

scholarly journals EFFECTS OF WELDING PARAMETERS, TIME INTERVAL AND PREHEATING ON RESIDUAL STRESS AND DISTORTION OF JOINING ST52 STIFFENER RING IN AN AISI 4130 TUBULAR SHELL

2020 ◽  
Vol 3 (1) ◽  
pp. 11-15
Author(s):  
Alireza M. Haghighi ◽  
Farhad S. Samani
Keyword(s):  
Residual Stress ◽  
Welding Current ◽  
Welding Parameters ◽  
Time Interval ◽  
Negative Effects ◽  
Short Term ◽  
Welding Line ◽  
Aisi 4130 ◽  
Comparison Of The Results

Stiffener rings and stringers are used commonly in offshore and aerospace structures. Welding the stiffener to the structure causes the appearance of residual stress and distortion that leads to short-term and long-term negative effects. Residual stress and distortion of welding have destructive effects such as deformation, brittle fracture, and fatigue of the welded structures. This paper aims to investigate the effects of preheating, time interval and welding parameters such as welding current and speed on residual stress and distortion of joining an ST52-3N (DIN 1.0570) T-shape stiffener ring to an AISI 4130 (DIN 1.7218) thin-walled tubular shell by eleven pairs of welding line in both sides of the ring by means of finite element method (FEM). Results in tangent (longitudinal), axial and radial directions have been compared and the best welding methods proposed. After the comparison of the results, simultaneous welding both sides of the ring with preheating presented as the best method with less distortion and residual stresses among the studied conditions. The correctness of the FEM confirmed by the validation of the results.

Low Mortality of Larval Lampreys from Electrofishing, Suction-pumping, Anesthesia, and Handling

2017 ◽  
Vol 8 (2) ◽  
pp. 640-647 ◽  
Author(s):  
Jeffrey C. Jolley ◽  
Christina T. Uh ◽  
Gregory S. Silver ◽  
Timothy A. Whitesel
Keyword(s):  
Pacific Northwest ◽  
Control Group ◽  
Long Term Effects ◽  
Negative Effects ◽  
Short Term ◽  
Important Species ◽  
Pacific Lamprey ◽  
The Pacific ◽  
Delayed Mortality

Abstract Native lamprey populations are declining worldwide. In the Pacific Northwest focus on conservation and management of these ecologically and culturally important species has increased. Concern has emerged regarding the effects of sampling and handling of lamprey, with little to no attention given to the larval lifestage. We monitored the survival of larval Pacific Lamprey Entosphenus tridentatus and Lampetra spp. after backpack electrofishing, deepwater electrofishing and suction-pumping, anesthesia, and handling. We performed survival trials on wild-caught lamprey (n = 15 larvae in each trial) collected from the Clackamas River drainage in Oregon, USA, coupled with control group trials from lamprey sourced from a hatchery (n = 10 larvae). Short-term (96 h) survival was >98% with only one observed mortality. Delayed mortality (1 wk) was observed for four individuals that had fungus; two of those were positive for the bacteria Aeromonas hyrdrophila. We recorded blood hematocrit as a secondary measure of stress. The baseline, nonstressed larvae hematocrit levels did not differ from those of fish that had undergone stress through electrofishing, suction-pumping, and handling without anesthesia. Electrofishing, suction-pumping, and anesthesia showed no short-term negative effects on larval lamprey although potential long-term effects remain unstudied. These techniques appear to provide efficient and relatively safe methods for collecting and surveying larval lamprey.

Retirement and Mortality

1980 ◽  
Vol 8 (1) ◽  
pp. 39-41 ◽  
Author(s):  
Timo Niemi
Keyword(s):  
Old Age ◽  
Short Term ◽  
Stress Situation ◽  
Short Term Effects

The present study investigated the effects of retirement on the mortality of the retired. The basis of retirement for the present subjects was in all cases age, not sickness. The subjects were 1 176 men retired on old age pension. In the present study, retirement could not be shown to have any long-term or short-term effects on mortality pointing to retirement not being such a stress situation as to result in an increase in mortality.

scholarly journals Prediction of Net Profit Growth of Pharmacy Companies on the Indonesian Stock Exchange

2019 ◽  
Author(s):  
Dhani Ichsanuddin Nur
Keyword(s):  
Stock Exchange ◽  
Funding Source ◽  
Negative Effects ◽  
Short Term ◽  
Applied Model ◽  
Positive Effects ◽  
Funding Sources ◽  
Net Profit ◽  
Auto Regressive

Background: The research purpose to analyzing impacts of funding source changes on pharmacy company profits that went public on Indonesian Stock Exchange, with analysis period of 2008 to 2013. Methods: The research applied analysis means in line with requirements of change variable measurements of funding sources in its interconnectedness with company profits; the applied model was Auto-regressive. Results: The research results indicated that changes of the last one-period short term debts had negative effects insignificantly on company profits, the last two-period short term debts had positive effects significantly on company profits, changes of the last one-period and two-period long term debts had negative effects insignificantly on company profits, equity changes of the last period had positive effects significantly on company profits, the last period profit changes had negative effects significantly on company profits. Conclusion: Last one-period short term, last one-period long term, last two-period long term debt changes, and last period profit have negative insignificant effect on company profit. Last two-period short term debt changes, last one-period equity changes, and last two-period equity changes have positive significant effect on company profit.

Social bonds, care, and successful ageing

2021 ◽  
pp. 51-58
Author(s):  
Clemens Tesch-Römer ◽  
Hans-Werner Wahl ◽  
Suresh I. S. Rattan ◽  
Liat Ayalon
Keyword(s):  
Social Support ◽  
Social Network ◽  
Old Age ◽  
Long Term Care ◽  
Social Bonds ◽  
Successful Ageing ◽  
Care Needs ◽  
Term Care ◽  
Self Development

Social bonds and care are important factors for successful ageing. Most people do not grow old in isolation, but together with other people, supporting them and being supported by them. While ageing, people are embedded into a social network formed by family, friends, and neighbours. These social bonds are a necessary precondition for successful self-development over the course of our lives. The process of growing very old is characterized by morbidity, functional loss, and care needs. Hence, it is important to account for factors that enable successful ageing even in a life phase when social support and long-term care are becoming more important for a good life. Therefore, successful ageing must be seen in the context of advanced old age.

Persistent, “Mysterious” Seismoacoustic Signals Reported in Oklahoma State during 2019

2021 ◽  
Author(s):  
Joshua D. Carmichael ◽  
Andrew D. Thiel ◽  
Phillip S. Blom ◽  
Jacob I. Walter ◽  
Fransiska K. Dannemann Dugick ◽  
...  
Keyword(s):  
Media Coverage ◽  
Seismic Network ◽  
Acoustic Energy ◽  
Short Term ◽  
Noise Abatement ◽  
National Media ◽  
The Subject ◽  
Seismic Networks ◽  
Dynamic Formation

ABSTRACT We report on the source of seismoacoustic pulses that were observed across the state of Oklahoma (OK) during summer of 2019, and the subject of national media coverage and speculation. Seismic network data collected across four U.S. states and interviews with witnesses to the pulse’s effect on residential structures demonstrate that they were triggered by routine ammunition disposal operations conducted by McAlester Army Ammunition Plant (McAAP). During these operations, conventional explosives destroy obsolete munitions stored in pits through a controlled sequence of electronically timed shots that occur over tens of minutes. Despite noise-abatement efforts that reduce coupling of acoustic energy with air, some lower frequency, subaudible (infrasonic) sound radiates from these shots as discrete pulses. We use nine months of blast log documents, seismic network records, analyst picks, and physical modeling to demonstrate that seismic stations as far as 640 km from McAAP sample these pulses, which record seasonal patterns in stratospheric and tropospheric winds, as well as the dynamic formation of waveguides and shadow zones. Digital short-term average to long-term average detectors that we augment with dynamic thresholds and time-binning operations identify these pulses with a fair probability, when compared with visual observations. Our analyses thereby provide estimates of observation rates for both partial and full sequences of these pulses, as well as single shots. We suggest that disposal operations can exploit existing, composite seismic networks to predict where residents are likely to witness blasting. Crucially, our data also show that dense seismic networks can record multiscale atmospheric processes in the absence of infrasound arrays.

Interaction Between Population Aging and Technological Innovation: A Chinese Case Study

2019 ◽  
Vol 23 (6) ◽  
pp. 971-979
Author(s):  
Xiang Li ◽  
Xindong Zhao ◽  
◽  
Keyword(s):  
Old Age ◽  
Technological Innovation ◽  
Population Aging ◽  
Causal Effect ◽  
The Elderly ◽  
Dependency Ratio ◽  
Age Dependency ◽  
Short Term ◽  
Age Dependency Ratio

Based on the method of unidirectional causality measure, this paper analyzes the long-term and short-term dynamic effects and causality between China’s population aging and technological innovation. According to the empirical results, first, the aging of the population will eventually have a continuous long-term impact, although it has little effect on the technology innovation in the short term. Second, when compared with the old-age dependency ratio, the child-raising ratio has a remarkable unidirectional causal effect on the technological innovation in the short term. Third, when compared with the old-age dependency ratio, the total dependency ratio has a stronger impact on the scientific and technological innovation ability, which is a long-term effect. The finding indicates that the elderly population and the children’s population have a continuous impact on China’s scientific and technological innovation, that is, the increase in social support burden affects the technological innovation for a long time.

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