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Internetbaserad rekrytering: mål, möjligheter och praktiker : En fallstudie av urvalet vid rekryteringen av sommarvikarier i Luleå kommunChertova, Evgeniya January 2012 (has links)
The purpose of this study is to examine web-based recruitment to short term summer jobs at the SocialServices Department in Luleå municipality in Sweden. Recruitment goals, selection options on therecruitment homepage Offentliga Jobb and recruitment practices were analysed in order to reach a deeperunderstanding of the interactions between these three levels in the selection process. Pre-selection throughOffentliga Jobb was a special concern of the study. Different consciousness levels in the selection process areemphasised according to Anthony Giddens' structuration theory. Ten recruiters from different parts of thedepartment were interviewed. Due to the qualitative nature of the study the conclusions concern only theactual respondents and can not be generalised to the whole population of recruiters. Selection options andselection practices at the Social Services Department were found to mostly correspond with the municipalityguidelines for recruitment as well as with policy documents such as shared values. There are however someconcerns about the Offentliga Jobb homepage not being user friendly. There is room for improvement insome rooted selection practices such as using age to measure social skills of the applicants and applying aslightly different skill-set profile to applicants with perceived international background. The importance ofmaking a universal skill-set profile for all applicants and of reflexions on the selection criteria at discursivelevel of consciousness is emphasised.
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Analýza získávání a výběru pracovníků v podniku JF Dřevovýroba, Chrudim / Analysis of staff recruitment and selection in JF Dřevovýroba, ChrudimHlavatá, Daniela January 2009 (has links)
Master's thesis is doing research in the theoretical part in staff recruitment, factors of recruitment, sources and methods of recruitment, pre-selection and methods of staff selection, adaptation of new staff. The practical part includes analyses of these personal activities used in JF Dřevovýroba company by using methods of questionnaire research, at first. Further information is detected considering structured interviews with managers, other staff of this company, and internal documents. The goal of this thesis is to compare personal activities used in practice with findings of HR specialists. In case of finding some deficiencies in personal activities listed above, I propose their solution to improve these processes
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Caracterização físico-química e culinária na predição da qualidade de grãos de arroz de terras altas / Physicochemical and cooking characterization on the prediction the grain quality of upland riceMoreira, Adriane Maranho 28 August 2012 (has links)
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Previous issue date: 2012-08-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The evaluation of cooking and sensory characteristics of a particular cultivar is an important
attribute for rice grain quality, in order to direct the decisions by the breeding programs and to
allow the prediction of its market acceptance. The target population of this study was
originated from a cross between two upland rice cultivars, BRS Primavera and Douradão,
chosen in order to add to descendent genotypes the desirable grain quality of the first with the
favorable agronomic profile of the second. The objective of this research was to propose a
methodology for evaluating the quality of grain from that upland rice segregating population
under different storage conditions, to optimize line selection in rice breeding programs
focused on rice table. The grains were harvested in 2010 in Santo Antonio de Goiás, milled
and analyzed for apparent amylose content, gelatinization temperature, rice flour paste
viscosity and cooking test. The results were used to calculate the Pearson correlation
coefficient (r). The ANOVA was performed by applying the "F" distribution of Fischer-
Snedecor, adopting a significance level of 5%. The physicochemical characterization
performed showed the existence of heterogeneous families. The observed changes in the
physicochemical and cooking characteristics prove that time and temperature of storage
promote modifications on chemical and physical properties of the grain, being the grain
cohesiveness reduction the most pronounced change. From the use of the proposed
methodology, it was possible to perform the pre-selection of accesses in the target population,
by reducing at least 76% the number of resulting samples for final selection. Only 5% of the
progeny were pre-selected for the five treatments simultaneously. Indirect analysis
recommended for the characterization of rice cooking quality for direct consumption did not
provide the desired setting with the cooking test, showing the need for greater integration of
generated results and the application of more refined sensory test; on the other hand, they
present themselves as appropriate to allow the pre-selection of accesses by this methodology.
The methodology proposed in this study showed to be a useful tool in the pre-selection of
individuals, and may also be adapted in the pre-selection of lines for other purposes in
breeding programs of rice culture and even for other cultures. / A avaliação de características culinárias e sensoriais de determinada cultivar é atributo
importante para qualidade de grãos em arroz, direcionando decisões para os programas de
melhoramento e permitindo predizer sua aceitação no mercado. A população alvo deste
estudo originou-se do cruzamento entre duas cultivares de arroz de terras altas, BRS
Primavera e Douradão, escolhidas com o propósito de agregar nos genótipos descendentes as
características de qualidade de grãos da primeira com o perfil agronômico favorável da
segunda. O objetivo desta pesquisa foi propor uma metodologia de avaliação da qualidade de
grãos, a partir dessa população segregante sob diferentes condições de armazenamento, para
otimizar a seleção de linhagens em programas de melhoramento com foco em arroz de mesa.
Os grãos foram provenientes da safra/2010 em Santo Antonio de Goiás, beneficiados e
analisados quanto ao teor de amilose aparente, temperatura de gelatinização, perfil
viscoamilográfico e teste de cocção. Os resultados foram utilizados para calcular o coeficiente
de correlação de Pearson (r). Na análise de variância foi empregada a distribuição "F" de
Fischer-Snedecor, adotando-se nível de significância de 5%. A caracterização físico-química
realizada mostrou a existência de heterogeneidade nas famílias. As mudanças observadas nas
características físico-químicas e culinárias comprovam que o tempo e a temperatura de
armazenamento promovem alterações na estrutura físico-química do grão, sendo a redução na
pegajosidade a alteração mais pronunciada. A partir do uso da metodologia proposta, foi
possível realizar a pré-seleção de famílias da população em estudo, reduzindo pelo menos
76% o número de amostras resultantes para a seleção final. Somente 5% da progênie foram
pré-selecionadas simultaneamente nos cinco tratamentos. As análises indiretas recomendadas
para a caracterização da qualidade culinária de arroz para mesa não apresentaram o ajuste
desejado com o teste de panela, mostrando a necessidade de maior integração dos resultados
gerados e da aplicação de teste sensorial mais refinado; por outro lado, apresentam-se como
adequadas para possibilitar a pré-seleção de linhagens por essa metodologia. A metodologia
proposta neste estudo mostrou-se como ferramenta útil na pré-seleção de famílias, podendo
ainda ser adaptada na pré-seleção de genótipos para outros fins em programas de
melhoramento da cultura de arroz e, até mesmo, de outras culturas.
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Kriging-assisted evolution strategy for optimization and application in material parameters identification / Contribution à l’optimisation évolutionnaire assistée par modèle de Krigeage : application à l’identification des paramètres en mécaniqueHuang, Changwu 06 April 2017 (has links)
Afin de réduire le coût de calcul pour des problèmes d'optimisation coûteuse, cette thèse a été consacrée à la Stratégie d'Evolution avec Adaptation de Matrice de Covariance assistée par modèle de Krigeage (KA-CMA-ES). Plusieurs algorithmes de KA-CMA-ES ont été développés et étudiés. Une application de ces algorithmes KA-CMA-ES développés est réalisée par l'identification des paramètres matériels avec un modèle constitutif d'endommagement élastoplastique. Les résultats expérimentaux démontrent que les algorithmes KA-CMA-ES développés sont plus efficaces que le CMA-ES standard. Ils justifient autant que le KA-CMA-ES couplé avec ARP-EI est le plus performant par rapport aux autres algorithmes étudiés dans ce travail. Les résultats obtenus par l'algorithme ARP-EI dans l'identification des paramètres matériels montrent que le modèle d'endommagement élastoplastique utilisé est suffisant pour décrire le comportement d'endommage plastique et ductile. Ils prouvent également que la KA-CMA-ES proposée améliore l'efficace de la CMA-ES. Par conséquent, le KA-CMA-ES est plus puissant et efficace que CMA-ES pour des problèmes d'optimisation coûteuse. / In order to reduce the cost of solving expensive optimization problems, this thesis devoted to Kriging-Assisted Covariance Matrix Adaptation Evolution Strategy (KA-CMA-ES). Several algorithms of KA-CMA-ES were developed and a comprehensive investigation on KA-CMA-ES was performed. Then applications of the developed KA-CMA-ES algorithm were carried out in material parameter identification of an elastic-plastic damage constitutive model. The results of experimental studies demonstrated that the developed KA-CMA-ES algorithms generally are more efficient than the standard CMA-ES and that the KA-CMA-ES using ARP-EI has the best performance among all the investigated KA-CMA-ES algorithms in this work. The results of engineering applications of the algorithm ARP-EI in material parameter identification show that the presented elastic-plastic damage model is adequate to describe the plastic and ductile damage behavior and also prove that the proposed KA-CMA-ES algorithm apparently improve the efficiency of the standard CMA-ES. Therefore, the KA-CMA-ES is more powerful and efficient than CMA-ES for expensive optimization problems.
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Amélioration d'un programme de sélection massale sur la croissance chez la truite arc-en-ciel par introduction d'une sélection BLUP pour des caractères de qualités grâce aux empreintes génétiques / Introduction of BLUP assisted sib-selection for quality traits in a mass selection program on growth in rainbow trout (Oncorhynchus mykiss)Haffray, Pierrick 09 November 2018 (has links)
Cette thèse précise les conditions pour introduire une sélection sur apparentés de caractères de qualité assistée par empreintes génétiques dans un programme de sélection massale sur la croissance chez la truite arc-enciel. Ce travail confirme l’intérêt à maîtriser l’effet maternel avec une doublement de l’héritabilité du poids à 70 g (0,36 vs 0,16), des estimations d’héritabilités des caractères mesurés de valeurs intermédiaires (0,37-0,54), l’intérêt d’utiliser la résiduelle des parties mesurées régressées linéairement au poids vif pour une sélection indépendante du poids pour les rendements, l’intérêt à remplacer la mesure du rendement au filetage par celle du rendement en carcasse éviscérée-étêtée plus héritable et très corrélé au rendement au filetage (0,97),la corrélation génétique élevée entre les rendements avec le ratio échographique e8/e23 (0,72-0,85) permettant une sélection sur candidats plus efficace qu’une sélection sur apparenté sur le rendement lui-même, des précisions élevées des valeurs génétiques (0.63–0.82) malgré très peu d’individus par famille (3,5-4) et une efficacité surestimée d’une sélection sur apparentés pré-sélectionnés (de 14 % à 62 %). Les conclusions sont qu’il est possible d’introduire une sélection sur apparentés dans un programme de sélection massale avec des gains génétiques au moins équivalents à ceux attendus en sélection familiale classique avec familles élevées initialement de façon séparées / The thesis aims at describing conditions to improve mass selection on growth by sib-selection on quality traits assisted by DNA parentage assignment in rainbow trout. Main results are that the control and management of differences in egg size between dams doubles heritability of body weight at 70 g (0.36 vs 0.16), heritabilities of quality traits are intermediates (0.37-0.54), the opportunity to use the residual of the body part (e.g. fillet weight) regressed to the whole body weight to select independently of body weight for ratios, the higher efficiency to replace fillet yield by deheaded and gutted carcass weight more heritable and highly genetically correlated to fillet yield (0.97), the possibility to use e8/e23ultrasound measures to predict genetically yields (0.72-0.85) allowing a direct selection on breeding candidates more efficient than in using sib information, a surprising intermediate to high accuracy of EBV even with a very low mean number of sib per full-sib family (3.5-4) and the medium to high overestimation of EBV when using pre- selected sibs (14 % to 62 %). The general conclusion are that sib-selection on quality traits can be introduced in mass selection with at least similar expected genetic gains than in traditional breeding design based on families reared initially separated
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