scholarly journals Variations in Types of First-Cousin Marriages over a Two-Generation Period among Arabs in Israel

2015 ◽  
Vol 05 (04) ◽  
pp. 171-176
Author(s):  
Rajech Sharkia ◽  
Muhammad Mahajnah ◽  
Muhammad Athamna ◽  
Ahmad Sheikh-Muhammad ◽  
Abdelnaser Zalan
Keyword(s):  
Generation Period

Beyond millennials v baby boomers: Using kindness to assess generationalism across four age cohorts in Australia

2021 ◽  
pp. 003802612110162
Author(s):  
Nicholas Hookway ◽  
Dan Woodman
Keyword(s):  
Young People ◽  
Strong Support ◽  
Social Attitudes ◽  
Growing Up ◽  
Longitudinal Methods ◽  
Age Cohorts ◽  
The Social ◽  
Youth And Young Adults ◽  
Generation Period ◽  
Life Cycle Effects

Today’s young people (youth and young adults) are routinely understood in generational terms, constructed as narcissistic and selfish in comparison with their predecessors. Despite announcements of a weakening commitment to values of kindness and generosity, there is little empirical research that examines these trends. The Australian Survey of Social Attitudes shows that young people are more likely to be kind but are less likely to think most Australians are kind. This article investigates this tension using focus groups with Australians of different ages (corresponding to major generational groupings) and drawing on the sociology of generations. To differentiate between generation, period and age/life-cycle effects requires longitudinal methods. However, these qualitative data suggest that a ‘generationalist’ discourse of young people as narcissistic is powerful in Australia and that young people are both internalising and challenging this framing. They appear to be responding to common experiences of growing up with the social and economic uncertainties of an ‘until-further-notice’ world and express strong support for values of kindness and openness to difference.

scholarly journals Response to selection for increased pupa weight in Tribolium castaneum as related to population structure

1977 ◽  
Vol 30 (3) ◽  
pp. 237-246 ◽  
Author(s):  
Alan J. Katz ◽  
Franklin D. Enfield
Keyword(s):  
Random Mating ◽  
Selection Response ◽  
Response To Selection ◽  
Short Term ◽  
Selection Systems ◽  
Line Selection ◽  
Selection For ◽  
Seven Generations ◽  
Generation Period ◽  
Term Response

SUMMARYThe effectiveness of selection for increased pupa weight in Tribolium was compared for three different selection systems. In all three systems the same number of breeding individuals was used each generation. Population L was a large random mating population with 24 males and 48 females selected each generation. The C4 and C8 populations were each divided into 6 subpopulations (lines) consisting of 4 males and 8 fem ales. Each of the three populations was replicated. In C4, selection for pupa weight was within lines for three generations, followed by a generation of among-line selection when the best two out of six lines were selected. These lines were then crossed to produce 6 new subpopulations, and the cycle was repeated. The C8 population was handled in exactly the same manner except that seven generations of selection within lines were practised before each generation of among-line selection. Selection response for the 42-generation period was significantly greater in the L population than in either subdivided population. No consistent differences among the selection systems were apparent when evaluating short-term response for the first 12 generations of the experiment. The results were interpreted as indicating that the influence of multiple-peak epistasis was not of major importance for this trait in determining ultimate response to selection when starting from a base population of previously unselected lines and utilizing a within- and among-line selection regime.

Population dynamics of the coconut caterpillar, Opisina arenosella Walker (Lepidoptera: Xyloryctidae), in Sri Lanka

1988 ◽  
Vol 78 (3) ◽  
pp. 479-492 ◽  
Author(s):  
P. A. C. R. Perera ◽  
M. P. Hassell ◽  
H. C. J. Godfray
Keyword(s):  
Population Dynamics ◽  
Sri Lanka ◽  
Dynamics Analysis ◽  
Triggering Mechanism ◽  
Working Hypothesis ◽  
Opisina Arenosella ◽  
Population Outbreaks ◽  
Pupal Parasitism ◽  
Generation Period

AbstractOpisina arenosella Walker is a defoliating pest of coconut in Sri Lanka. A first attempt was made to understand its population dynamics. Analysis of records of population outbreaks throughout the country from 1965 to 1985 revealed cycles in the population of approximately one generation period, giving the population the appearance of partially discrete generations. There was also evidence for longer cycles of six-month period. Outbreaks occurred throughout the coconut-growing regions of Sri Lanka, and the numbers of outbreaks per year in different provinces were sometimes correlated, indicating a common, probably climatic, triggering mechanism. Parasitism remained high throughout the outbreaks and there was some evidence that pupal parasitism increased towards the end of an outbreak. A working hypothesis that explains the population dynamics of O. arenosella and the origin of outbreaks is presented.

Chemical Kinetics Application of Hydrocarbon Generation of Shuang Yang Stratum in well Chang 27

2013 ◽  
Vol 807-809 ◽  
pp. 2133-2138
Author(s):  
Gui Lei Wang ◽  
Hai Tao Xue ◽  
Shuang Fang Lu ◽  
Wei Ming Wang
Keyword(s):  
Activation Energy ◽  
Kinetic Model ◽  
Chemical Kinetics ◽  
Thermal Simulation ◽  
Hydrocarbon Generation ◽  
Late Period ◽  
Simulation Data ◽  
Generation Stage ◽  
Rock Eval ◽  
Generation Period

To determine the hydrocarbon - generating characteristics of Shuangyang Formation in Well Chang 27.We selected dark mudstone in Shuangyang Formation to launch Rock-Eval (open system) thermal simulation. Through thermal simulation data to demarcate a kinetic model,the Shuangyang Stratum mudstone samples reveal the gas intensity is mainly distributed in (210~230) kJ/mol),the average activation energy is 223kJ/mol. The hydrocarbon - generating characteristics of Shuangyang Formation in Well Chang 27 whose hydrocarbon generation stage mainly in the period (37~24) Ma, corresponding the late period of the Yongji Formation deposition to the late period of the Qijia Formation deposition. In Chang 27 Well area,the average generating strength of gas in Shuangyang Formation is (21~37×108) m3·km2. The hydrocarbon generation stage of Shuangyang Formation in Chang 27 Well area is mainly in (37~24) Ma, corresponding to the late deposition period of the Yongji Formation and Qijia Formation. Both the shorter periods of hydrocarbon generation and late hydrocarbon generation period made great contributions to accumulation, in which Shuang_1 formation played a bigger role.

scholarly journals Generation of solitary waves by forward- and backward-step bottom forcing

2001 ◽  
Vol 432 ◽  
pp. 341-350 ◽  
Author(s):  
DAO-HUA ZHANG ◽  
ALLEN T. CHWANG
Keyword(s):  
Solitary Waves ◽  
Water Surface ◽  
Bottom Topography ◽  
Surface Region ◽  
Resistance Coefficient ◽  
Wave Resistance ◽  
Wave System ◽  
Two Dimensional ◽  
Wave Emission ◽  
Generation Period

A finite difference method based on the Euler equations is developed for computing waves and wave resistance due to different bottom topographies moving steadily at the critical velocity in shallow water. A two-dimensional symmetric and slowly varying bottom topography, as a forcing for wave generation, can be viewed as a combination of fore and aft parts. For a positive topography (a bump), the fore part is a forward-step forcing, which contributes to the generation of upstream-advancing solitary waves, whereas the aft part is a backward-step forcing to which a depressed water surface region and a trailing wavetrain are attributed. These two wave systems respectively radiate upstream and downstream without mutual interaction.For a negative topography (a hollow), the fore part is a backward step and the aft part is a forward step. The downstream-radiating waves generated by the backward-step forcing at the fore part will interact with the upstream-running waves generated by the forward-step forcing at the aft. Therefore, the wave system generated by a negative topography is quite different from that by a positive topography. The generation period of solitary waves is slightly longer and the instantaneous drag fluctuation is skewed for a negative topography. When the length of the negative topography increases, the oscillation of the wave-resistance coefficient with time does not coincide with the period of solitary wave emission.

Homogeneous generation period method for the analysis of wind generation variation

2014 ◽  
Vol 86 ◽  
pp. 165-174
Author(s):  
Arturas Klementavicius ◽  
Virginijus Radziukynas ◽  
Neringa Radziukyniene ◽  
Gediminas Pukys
Keyword(s):  
Wind Generation ◽  
Generation Period

Mutant Alleles of Small Effect Are Primarily Responsible for the Loss of Fitness With Slow Inbreeding in Drosophila melanogaster

Genetics ◽  
1998 ◽  
Vol 148 (3) ◽  
pp. 1143-1158 ◽  
Author(s):  
B D H Latter
Keyword(s):  
Drosophila Melanogaster ◽  
Population Size ◽  
Effective Population ◽  
Gene Frequencies ◽  
Marker Loci ◽  
Laboratory Populations ◽  
Neutral Marker ◽  
The Mean ◽  
The Stability ◽  
Generation Period

AbstractMultilocus simulation is used to identify genetic models that can account for the observed rates of inbreeding and fitness decline in laboratory populations of Drosophila melanogaster. The experimental populations were maintained under crowded conditions for ~200 generations at a harmonic mean population size of Nh ~65–70. With a simulated population size of N = 50, and a mean selective disadvantage of homozygotes at individual loci ~1–2% or less, it is demonstrated that the mean effective population size over a 200-generation period may be considerably greater than N, with a ratio matching the experimental estimate of Ne/Nh ~1.4. The buildup of associative overdominance at electrophoretic marker loci is largely responsible for the stability of gene frequencies and the observed reduction in the rate of inbreeding, with apparent selection coefficients in favor of the heterozygote at neutral marker loci increasing rapidly over the first N generations of inbreeding to values ~5–10%. The observed decline in fitness under competitive conditions in populations of size ~50 in D. melanogaster therefore primarily results from mutant alleles with mean effects on fitness as homozygotes of sm ≤ 0.02. Models with deleterious recessive mutants at the background loci require that the mean selection coefficient against heterozygotes is at most hsm ~0.002, with a minimum mutation rate for a single Drosophila autosome 100 cM in length estimated to be in the range 0.05–0.25, assuming an exponential distribution of s. A typical chromosome would be expected to carry at least 100–200 such mutant alleles contributing to the decline in competitive fitness with slow inbreeding.

scholarly journals DAMPAK KEBIJAKAN MORATORIUM PEGAWAI NEGERI SIPIL TERHADAP PENEMPATAN PEGAWAI DI PEMERINTAH DAERAH DAERAH ISTIMEWA YOGYAKARTA

2017 ◽  
Vol 4 (2) ◽  
pp. 143-157
Author(s):  
Ahmad Harimurti Nugroho ◽  
Nur Widiastuti
Keyword(s):  
Research Method ◽  
Secondary Data ◽  
Qualitative Approach ◽  
Civil Servants ◽  
Lost Generation ◽  
Response Strategies ◽  
Descriptive Research ◽  
Depth Interviews ◽  
Generation Period ◽  
Personnel Expenditure

One important issue in the management of civil servants are Moratorium Acceptance CPNS. Since the 2011-2014 and 2015-2019 reign of discretionary moratorium CPNS caused by various things, impact of the moratorium on the placement of employees in local government and polemics consequences and need for a solution and response strategies in the redistribution of personnel and employee planning.This research uses descriptive research method with qualitative approach gained popularity depth interviews with informants, observations and secondary data analysis. Impact, occurrence Lost Generation that cause within a certain time difficult to regenerate for their miss a link on the generation / period. The addition of the workload of employees as a result of shortage of supply of labor civil servants, retired employee were not replaced, Minus growth means if in compare between employees incoming and outgoing, more employees are out of personnel expenditure would be reduced. So that in the possible procure Non civil servants without violating the moratorium policy is still valid.

Challenging Traditions

2014 ◽  
pp. 258-286
Author(s):  
Magdalena De Stefani
Keyword(s):  
Professional Development ◽  
Emergent Literacy ◽  
Change Agent ◽  
Research Process ◽  
Data Generation ◽  
New Approach ◽  
Cooperative Development ◽  
Development Processes ◽  
Awareness Raising ◽  
Generation Period

In this chapter, the author presents the case of Mariana, a Uruguayan non-native speaking teacher of English working at Lake Primary School in Uruguay. This chapter describes an action research process during which the author and a colleague reconstructed the experience of introducing a new approach to the teaching of emergent literacy with six-year-olds. In order to generate data, apart from holding a series of interviews and class observations, they engaged in Cooperative Development sessions (Edge, 2002, p. 18) using the framework to engage in “a mixture of awareness-raising and disciplined discourse” as a further means of facilitating the understanding of professional development processes. During and after the data generation period, the author analysed the data and shared the interpretations with her colleague, who examined them critically, adding her own views and clarifying as necessary. In the midst of the explorations of pedagogical experiences, the author and her colleague allowed other discourses to emerge, and were thus able to draw conclusions regarding Mariana's identity as a non-native speaking teacher, her ability to deal with change and innovation, her relationship with peers, as well as her newly-discovered roles as researcher, leader, and change agent.

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