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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
691

Contribution à l'étude phytochimique d'orchidées tropicales : identification des constituants d'Aerides rosea et d'Acampe rigida : techniques analytiques et préparatives appliquées à Vanda coerulea et Vanda teres

Čáková, Veronika 16 December 2013 (has links) (PDF)
L'analyse de la composition chimique de deux orchidées de la sous-tribu des Aeridinae, Aerides rosea Lodd. ex. Lindl. & Paxton et Acampe rigida (Buch.-Ham. ex Sm.) P. F. Hunt, a été menée en ayant recours à des techniques de couplages et grâce à une stratégie de déréplication. Dix dérivés phénanthréniques ont ainsi été identifiés dans les tiges d'A. rosea, dont deux nouvellement décrits. Quatre stilbénoïdes, trois dérivés d'acides phénoliques et quatre esters d'acide cinnamique ont été identifiés dans les tiges d'A. rigida. Nous avons également effectué des dosages de traceurs dans différents échantillons de deux représentants de la tribu des Vandeae : Vanda teres (Roxb.) Lindl. et Vanda coerulea Griff. ex. Lindl., afin de mettre en évidence d'éventuelles variations de composition en fonction des facteurs environnementaux et du stade de croissance végétative. Enfin, nous avons mis au point des conditions d'isolement préparatif par chromatographie de partage centrifuge afin de purifier des marqueurs biologiques préalablement identifiés dans les tiges de Vanda teres : trois glucospyranosyloxybenzyl - malates ainsi que leur précurseur biosynthétique.
692

La gestione del capitale intellettuale per ottenere un vantaggio competitivo sostenibile / MANAGING INTELLECTUAL CAPITAL TO OBTAIN A SUSTAINABLE COMPETITIVE ADVANTAGE

UGLIETTI, GUIDO 25 March 2013 (has links)
Questo lavoro di ricerca poggia sulla solida convinzione che sia necessario un salto di qualità sia negli investimenti in capitale intellettuale che nelle pratiche di gestione manageriale, al fine di attivare un processo di crescita di lungo corso che duri nel tempo. Dal momento che l'economia della conoscenza riveste una sempre maggiore importanza, questo studio ha verificato gli effetti che le pratiche HR e le capacità di rinnovamento possono esercitare sul capitale intellettuale al fine di creare un vantaggio competitivo sostenibile. Il modello adottato ha considerato il capitale intellettuale come la somma di tre componenti: capitale umano, capitale relazionale e capitale strutturale. In un ambiente dinamico, come l'attuale, il capitale intellettuale può essere il fattore chiave per ottenere un vantaggio competitivo sostenibile, dal momento che è raro, di valore e difficile da imitare o sostituire. Per questa ragione, il presente studio ha esaminato gli elementi decisivi per la gestione del capitale intellettuale in un ambiente competitivo turbolento valutando l'impatto delle componenti del capitale intellettuale sulla soddisfazione dei dipendenti e la qualità del servizio. I dati analizzati nell'ambito di questa ricerca sono stati raccolti attraverso questionari a cui hanno risposto varie realtà operanti nel settore finanziario in Italia e alcuni dei loro partner, operanti nel settore ICT, specializzati in attività ad alta intensità di capitale umano come lo sviluppo di applicazioni informatiche. Sono state individuati alcuni importanti risultati. In primo luogo, le capacità di rinnovamento mediano la relazione tra le pratiche HR e le componenti del capitale intellettuale. In secondo luogo, il capitale umano ha un impatto positivo diretto sulla qualità del servizio. In terzo luogo, il capitale strutturale influenza positivamente la soddisfazione dei collaboratori. Quindi, la soddisfazione dei collaboratori e la qualità del servizio sono alimentati e sostenuti da differenti fattori chiave: il capitale strutturale e il capitale umano rispettivamente. Da una prospettiva pratica e manageriale questi risultati sono molto interessanti al fine di deliberare l'allocazione delle risorse aziendali per ottenere delle configurazioni di capitale intellettuale efficaci. Le ricerche future potrebbero indagare i contribuiti dei differenti portatori d'interesse sugli antecedenti e conseguenti del capitale intellettuale valutando la capacità di produrre valore e, come conseguenza, la soddisfazione dei portatori d'interesse adottando un approccio di tipo managing-for-stakeholders. I fornitori e i clienti rivestono un ruolo centrale nelle dinamiche aziendali e per questo meritano particolare attenzione negli studi che saranno svolti nel prossimo futuro. / This work is rooted in the conviction that our economies need both better investments in intellectual capital and better management practices in order to achieve higher long-term growth. Starting acknowledging the increasing importance of the knowledge economy phenomenon, this study assessed the effects that HR practices and renewal capability can exert on firm’s intellectual capital in order to create a sustainable competitive advantage. The adopted model has considered intellectual capital as the sum of three components: human capital, relational capital and structural capital. In a dynamic environment, such as today’s competitive arena, intellectual capital can be the key factor to obtain a sustainable competitive advantage, because it is rare, valuable and difficult to imitate or substitute. For this reason, the present study has examined the key drivers to manage intellectual capital in a turbulent environment evaluating the impact of firm’s intellectual capital components on employees’ satisfaction and service quality. This research has gathered data through surveys of various Italian business units operating in the financial sector and some of their ICT partners specialised in human capital-intensive activities such as software development. A set of findings has been generated. First, renewal capability mediates the relationships between HR practices and all intellectual capital components. Second, human capital has a direct positive relationship with service quality. Third, structural capital has a direct positive relationship with employees’ satisfaction. Hence, employees’ satisfaction and service quality are nurtured and fostered by different crucial drivers: structural capital and human capital respectively. From a managerial and practical perspective these findings are very interesting in order to deliberating the allocation of firms’ resources to obtain effective intellectual capital configurations. Future researches may investigate the contributions of different stakeholders to the antecedents of intellectual capital as well as the contributions to its consequences in order to produce value and, in turn, stakeholders’ satisfaction adopting a managing-for-stakeholders approach. Suppliers and customers play a central role and for this reason they deserve particular attention in future studies.
693

Costing conflict : a multiple case study approach to quantifying conflict in the mining industry in South Africa

Burger, Dore Gertel 03 1900 (has links)
Thesis (MComm)--Stellenbosch University, 2013. / This study will focus on conflict within organisations in the attempt to gain clarity on this very common phenomenon and to link conflict to financial cost. By gaining a financial grip on conflict this study attempts to give the reader the tools with which to estimate parameters and calculate financial costs within their own conflict situations. The reader will also be able to motivate the need for management to invest in pre-emptive conflict resolution structures. The study will focus on a sample population from the mining sector in South Africa. A multiple case study approach is used in order to understand the intricacies that make conflict a variable, situation-dependant occurrence after which data is collected to calculate a preliminary estimate of the financial costs incurred by the organisation due to hostilities within the sample population. The results of the study indicate that the samples chosen experience different types of conflict and also manage the conflict in different ways. The calculations reflect that conflict impacts on the organisation in a fiscally prominent way. Each case has its own unique major contributors to monetary costs incurred due to conflict depending on case specific attributes. The results clearly show that the financial cost of conflict has a severe impact on an organisation. The structured analysis provided by the study gives the reader a method with which to calculate the costs of conflict within other cases where conflict is assumed to have a negative impact on performance. In this way it becomes easier for the practitioner to effectively motivate for preventative action.
694

Estratégias analíticas para determinação de espécies inorgânicas em medicamentos utilizados no tratamento de anemia ferropriva

Barbosa, Uenderson Araújo 28 September 2015 (has links)
Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2016-02-25T13:31:28Z No. of bitstreams: 1 Tese Uenderson Araujo Barbosa -final.pdf: 2006362 bytes, checksum: 7f8502d02bb06b7f75032fb7a79d79bc (MD5) / Approved for entry into archive by Ana Hilda Fonseca (anahilda@ufba.br) on 2016-05-10T17:54:24Z (GMT) No. of bitstreams: 1 Tese Uenderson Araujo Barbosa -final.pdf: 2006362 bytes, checksum: 7f8502d02bb06b7f75032fb7a79d79bc (MD5) / Made available in DSpace on 2016-05-10T17:54:24Z (GMT). No. of bitstreams: 1 Tese Uenderson Araujo Barbosa -final.pdf: 2006362 bytes, checksum: 7f8502d02bb06b7f75032fb7a79d79bc (MD5) / CAPES e CNPq / Neste trabalho foram propostas estratégias analíticas visando à avaliação toxicológica de metais e metaloides em medicamentos utilizados no tratamento da anemia ferropriva, empregando técnicas cromatográficas e não cromatográficas. Na primeira parte desta tese determinou-se chumbo nos medicamentos aplicando espectrometria de absorção atômica com atomização eletrotérmica (ETAAS). O preparo da amostra foi realizado fazendo uso de digestão ácida em bloco digestor com sistema de refluxo “dedo frio” usando 3 mL de HNO3 (69% v/v) e 1 mL de H2O2 (30% v/v). Foram otimizadas as temperaturas de pirólise e atomização usando uma mistura de paládio e magnésio como modificador químico convencional, obtendo-se 1100ºC e 2000ºC para pirólise e atomização, respectivamente. Com uma massa característica de 21,3 pg e 0,25 e 0,82 µg L-1, para os limites de detecção (LD) e de quantificação (LQ), respectivamente. A precisão, expressa pelo desvio padrão relativo de 5.92% para uma amostra com concentração de chumbo igual a 2,98 µg g-1. A exatidão foi estimada por comparação entre os resultados obtidos por ETAAS e espectrometria de massas com plasma indutivamente acoplado (ICP-MS). As concentrações de chumbo nas amostras variaram entre 0,096 e 7,068 µg g-1. Na segunda parte deste trabalho, foi efetuada a determinação de mercúrio através de amostragem em suspensão e espectrometria de absorção atômica com alta resolução e fonte contínua com geração de vapor frio (HR-CS CVAAS). As condições ótimas de preparo das suspensões (1,5 mol L-1 de HCl, 1,25% (m/v) de tioureia e 15 minutos de sonicação) foram otimizadas por planejamento fatorial completo. Os limites de detecção e quantificação foram 0,63 ng g-1 e 2,11 ng g-1, respectivamente. O desvio padrão relativo para avaliação da precisão foi calculado usando duas amostras com concentrações 4,82 e 9,61 ng g-1 com resultados 10,89 e 6,84%, respectivamente. Foi estimada a possível perda de mercúrio durante o procedimento proposto e a exatidão, mediante testes de adição e recuperação, variando entre 85,0 e 106,0%. As concentrações de mercúrio ficaram entre 3,17 e 34,86 ng g-1. A terceira parte deste trabalho descreve a determinação de macro e microelementos e o estudo in vitro da bioacessibilidade de ferro em medicamentos usados no tratamento da anemia ferropriva. Foi escolhida a espectrometria de emissão ótica com plasma indutivamente acoplado (ICP OES) como técnica analítica de medida. Foi efetuada digestão ácida para tratamento das amostras e o método foi validado, demonstrando boa sensibilidade, com limites de quantificação (mg L-1) 0,52 para Ca, 0,14 para K, 0,03 para Mg, 0,07 para Mn, 0,40 para Na, 0,36 para P e 0,24 para Zn. A precisão do método foi reconhecida mediante experimentos repetitivos intradia e interdia com resultados abaixo de 20%. Durante estudo da exatidão, testes de adição e recuperação foram executados em diferentes concentrações com resultados entre 81,85 e 114,97%. A robustez do plasma foi calculada mediante uma razão entre as linhas iônica e atômica de magnésio, Mg(II)/Mg(I) e os resultados, mediante análise componentes principais (PCA) e análise por agrupamentos hierárquicos (HCA). O estudo de bioacessibilidade in vitro de Fe demonstrou que alguns medicamentos são melhores bioacessíveis, sendo portanto, mais recomendados para o tratamento da anemia, comprovando dados da literatura farmacológica. Na quarta parte deste trabalho descreve-se o estudo da determinação e especiação simultânea de arsênio e cromo por 11 cromatografia líquida de alta eficiência acoplada à ICP-MS (HPLC-ICP-MS). A determinação total de arsênio e cromo foi realizada usando uma digestão ácida em forno de micro-ondas, uma mistura de 4 mL HNO3 (69% v/v) e 1 mL de H2O2 (30% v/v) e análise por ICP-MS. Para o estudo de especiação foi elaborado um estudo com três possíveis procedimentos para extração das espécies, sendo selecionado um procedimento com água a 80ºC por 30 minutos em energia de micro-ondas. Usando uma fase móvel contendo 1,0 mM de hidróxido de tetrabutilamônio (TBAH), 0,7 mM de ácido etilenodiaminotetracético (EDTA) e 5% de metanol (v/v) em pH 7,2 foi possível separar as espécies presentes com tempo de retenção de 5 minutos com separação de As(III), As(V), Cr(III) e Cr(VI), com limites de detecção de 0,002, 0,003, 0,140 e 0,042 µg g-1, respectivamente. A exatidão do método foi avaliada conforme testes de adição e recuperação, entre 80,64 e 109,36%. O método foi aplicado em amostras do Brasil e Espanha, com concentrações entre 0,1-1,3 e 0,18-62,27 µg g-1 para As e Cr, respectivamente. / In this thesis work analytical strategies have been proposed for toxicological assessment of metals and metalloids in medicines used to treat iron deficiency anemia, using chromatographic and non-chromatographic techniques. In the first part of this thesis, lead was determined in drugs using electrothermal atomic absorption spectrometry (ETAAS). Sample preparation was performed using acid digestion in digester block with reflux system "cold finger" using 3 mL of HNO3 (69% v / v) and 1 mL of H2O2 (30% v / v). Pyrolysis and atomization temperatures were optimized using a mixture of palladium and magnesium as conventional chemical modifier, yielding 1100°C and 2000°C for pyrolysis and atomization, respectively. With a characteristic mass of 21.3 pg and 0.25 and 0.82 µg g-1, for limit of detection (LOD) and limit of quantification (LOQ), respectively. The accuracy, expressed as relative standard deviation was 5.92% for a sample with lead concentration of 2.98 µg g-1. The accuracy was evaluated by comparing the results obtained by ETAAS and inductively coupled plasma mass spectrometry (ICP-MS). Lead concentrations found in samples ranged between 0.096 and 7.068 µg g-1. In the second part of this work, the determination of mercury using slurry sampling and high resolution continuous source cold vapor atomic absorption spectroscopy (HR-CS CVAAS) was performed. The optimum conditions for preparation of slurries (1.5 mol L-1 HCl, 1.25% (w / v) thiourea and 15 minutes sonication) were optimized using a two level full factorial design. The limits of detection and quantification were 0.63 ng g-1 and 2.11 ng g-1, respectively. The relative standard deviation for accuracy evaluation was calculated using two samples with concentrations 4.82 and 9.61 ng g-1 from which was obtained as results 10.89 and 6.84%, respectively. The possible loss of mercury was evaluated for the proposed procedure and the accuracy was studied by addition/recovery test, with recoveries ranging from 85.0 to 106.0%. Mercury concentrations ranged between 3.17 and 34.86 ng g-1. The third part of this work describes the determination of macro and micro elements and the in vitro study of iron bioaccessibility in medicines used to treat iron deficiency anemia. It was used inductively coupled plasma optical emission spectrometry (ICP OES) measured as an analytical technique. Acid digestion treatment was conducted to the samples and the method was fully validated by demonstrating good sensitivity with quantification limits (mg L-1) 0.52 for Ca, 0.14 for K, 0.03 for Mg, 0.07 for Mn, 0.40 for Na, 0.36 for P and 0.24 for Zn. The precision of the method was evaluated by intraday and interday repetitive experiments with results below 20%. During accuracy evaluation, addition/recovery tests were performed at different concentrations with results between 81.85 and 114.97%. The robustness of plasma was evaluated by a ratio between magnesium atomic and ionic lines, Mg(II)/Mg(I). The results were evaluated by multivariate analysis tools, principal component analysis (PCA) and hierarchical cluster analysis (HCA). The study of in vitro bioaccessibility of Fe showed that some drugs are better bioaccessible, being therefore more recommended for anemia treatment, confirming data of pharmacological literature. The fourth part of this work describes the simultaneous determination of arsenic and chromium speciation using high-performance liquid chromatography coupled to ICP-MS (HPLC-ICP- MS). The total arsenic and chromium determination was carried out using an acid digestion in microwave oven, using a mixture of 4 mL HNO3 (69% v / v) 9 and 1 mL of H2O2 (30% v / v) and analyzed by ICP-MS. For speciation, a study was performed with three possible procedures for extraction of species, being employed a procedure with water at 80 °C for 30 minutes in microwave energy. Using a mobile phase containing 1.0 mM tetrabutylammonium hydroxide (TBAH), 0.7 mM ethylenediaminetetraacetic acid (EDTA) and 5% methanol (v / v) under pH 7.2 was possible the separation of the species present with retention time of 5 minutes with separation of As(III) As(V), Cr(III) and Cr(VI), with a LOD of 0.002, 0.003, 0.140 and 0.042 µg g-1, respectively. The accuracy was assessed using addition/recovery tests, ranging between 80.64 and 109.36%. The method was applied in samples from Brazil and Spain.
695

Planejamento de experimento empregado na otimização de métodos analíticos para a determinação de macronutrientes, micronutrientes e elementos traço em fertilizantes minerais por espectometria atômica

Souza, Sidnei de Oliveira 24 July 2014 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In this work were applied experimental designs to the optimization of analytical methods using atomic spectrometry. Firstly, simultaneous experimental designs were applied to the optimization of two analytical methods, being the first analytical method for the simultaneous determination of macronutrients (Ca, Mg, Na and P), micronutrients (Cu, Fe, Mn and Zn) and trace elements (Al, As, Cd, Pb and V) and other for the simultaneous determination of Th and U in mineral fertilizers, both employing inductively coupled plasma optical emission spectrometry (ICP OES). The results of the analysis of mineral fertilizers showed that the elements regulated by Ministry of Agriculture, Livestock and Food Supply (Ministério da Agricultura, Pecuária e Abastecimento MAPA) were in agreement with the same, and that the high resolution ICP OES allowed to selectivity possible interfering Ca, Fe and Th in the determination of U, indicating that can be performed simultaneous determination of Th and U by technique. In the second part, univariate designs were applied to the optimization of two analytical methods using direct solid sampling (SS) and detection by high resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS), one for the determination of Cu and other for Hg in phosphate fertilizers. The results showed that simple superphosphate and triple superphosphate 2 fertilizers samples obtained concentrations of Hg above the maximum limit established by MAPA, as well showed the highest concentrations of Cu, however this is not regulated. The analytical methods proposed in this work were simple, efficient, fast, accurate and reliable for the determination of macronutrients, micronutrients and trace elements in mineral fertilizers by atomic spectrometry. / Neste trabalho foram aplicados planejamentos de experimentos para a otimização de métodos analíticos utilizando a espectrometria atômica. Primeiramente, foram aplicados planejamentos simultâneos para a otimização de dois métodos analíticos, sendo o primeiro método analítico para a determinação simultânea de macronutrientes (Ca, Mg, Na e P), micronutrientes (Cu, Fe, Mn e Zn) e elementos traço (Al, As, Cd, Pb e V), e outro para a determinação simultânea de Th e U em fertilizantes minerais, ambos empregando espectrometria de emissão óptica com plasma acoplado indutivamente (ICP OES). Os resultados das análises de fertilizantes minerais demonstraram que os elementos regulamentados pelo Ministério da Agricultura, Pecuária e Abastecimento (MAPA) estavam de acordo com a mesma, e que a alta resolução do ICP OES permitiu a seletividade dos possíveis interferentes Ca, Fe e Th na determinação do U, indicando que pode ser realizada a determinação simultânea de Th e U pela técnica óptica. Na segunda parte, foram aplicados planejamentos univariados para a otimização de dois métodos analíticos utilizando análise direta de sólidos (SS) e detecção por espectrometria de absorção atômica de alta resolução com fonte contínua e atomização em forno de grafite (HR-CS GF AAS), um para a determinação de Cu e o outro para Hg em fertilizantes fosfatados. Os resultados mostraram que as amostras de fertilizantes superfosfato simples e superfosfato triplo 2 obtiveram concentrações de Hg acima dos limites máximo estabelecidos pelo MAPA, bem como apresentaram as maiores concentrações de Cu, porém este não é regulamentado. Os métodos analíticos propostos neste trabalho foram simples, eficientes, rápidos, exatos e confiáveis para a determinação de macronutrientes, micronutrientes e elementos traço em fertilizantes minerais por espectrometria atômica.
696

Etude in situ par RMN HRMAS sur des épidermes reconstruits du métabolisme et de la réactivité de xénobiotiques allergisants / In situ study of metabolism and reactivity of allergenic molecules on reconstructed human epidermis by HR-MAS NMR

Moss, Éric 16 January 2015 (has links)
L’allergie de contact est une pathologie de la peau particulièrement répandue dans les pays industrialisés. Aucune thérapie ne permet actuellement de la soigner et seule l’éviction de l’allergène permet de la prévenir. Historiquement, l’évaluation du potentiel sensibilisant des molécules mises sur le marché a toujours été réalisée au moyen de tests sur l’animal. Cependant, le champ d’action de ces tests est aujourd’hui limité en raison de la nouvelle législation européenne sur les cosmétiques. Dans ce contexte, le développement de méthodes alternatives ne reposant pas sur l’utilisation d’animaux devient capital. L’allergie de contact repose sur une étape chimique clé : la formation d’un complexe antigénique allergène-protéine capable d’activer le système immunitaire cutané. Le but de ce travail de thèse a été d’étudier le comportement in situ d’allergènes au sein d’épidermes reconstruits de type SkinEthic®. A l’aide d’une technique d’analyse non invasive, la spectroscopie RMN HRMAS, il a été possible de suivre le devenir de différents allergènes, de leur éventuelle activation par voie métabolique, jusqu’à leur fixation sur les protéines épidermiques. / Contact dermatitis is a skin pathology particularly prevalent in industrialized countries. No therapy currently exists and only complete avoidance of the particular allergen can prevent an allergic reaction. Historically, the assessment of skin sensitisation potential of molecules placed on the market was always carried out by animal testing. However, the scope of this testing method is now limited by the new European cosmetics legislation. In this way, the development of alternative methods, not based on animal experimentation, become an important issue. Contact dermatitis results of a chemical key step: the formation of an antigenic complex allergen-protein complexe able to activate the cutaneous immune system. The aim of this PhD work was to study the in situ behaviour of allergens in reconstructed human epidermis (SkinEthic® model). By using an appropriate non-invasive analysis technique, HR-MAS NMR spectroscopy, it has been possible to study the mode of action of different allergens, from their possible activation through the metabolic pathway to the binding with epidermal proteins.
697

Dépasser la norme sexuée des politiques d'équilibre vie professionnelle - vie personnelle en entreprise pour construire l'égalité professionnelle femmes-hommes : analyse de deux contextes contrastés : la France et l'Espagne / Going beyond the gendered norm of the worklife balance policies to build real gender equality in the workplace : analysis of two contrasted contexts : France and Spain

Tanquerel, Sabrina 12 November 2014 (has links)
Ce travail de recherche doctorale a pour objectif de mieux comprendre le lien entre politiques d’équilibre vie professionnelle- vie personnelle et égalité femmes-hommes en entreprise. Il s’attache à comprendre comment ces dispositifs influencent la norme sexuée.En mobilisant le cadre théorique des représentations sociales, notre investigation s’appuie sur deux études de cas approfondies, avec 44 entretiens semi-directifs « outil majeur de repérage des représentations » (Abric, 2011), comme méthode principale de collecte de données. Nous avons choisi de mener ces études dans deux pays différents : la France et l’Espagne, en raison de leur approche contrastée de la question de la conciliation : plutôt traditionnelle pour la France, plutôt intrusive et individualisée pour l’Espagne.Les résultats mettent en lumière l’hétérogénéité et le caractère sexué des représentations des salariés vis-à-vis des politiques d’équilibre, celles-ci apparaissent aussi fortement liées à la figure du manager et à son style de management. La catégorisation des représentations (progressistes/ traditionnalistes/ neutres et hostiles) contribue à comprendre leur influence sur l’égalité, et fait apparaître que la prise de conscience des inégalités –plus forte chez les salariés espagnols- est une condition préalable vers une conciliation égalitaire. / This PhD research aims at better understanding the link between work life balance policies and gender equality in the workplace. The objective is to understand how these measures can influence sexual roles division at work.By referring to the theoretical framework of social perceptions, our work is based on two main case studies, with 44 semi-oriented interviews “major tool to identify perceptions”, as the main method to collect data. We chose to conduct the two case studies in two different countries: France and Spain, because of their contrasted approach towards work life balance topic: rather traditional for France, more intrusive and individualized for Spain.The results highlight the heterogeneity and the gendered character of the employees’ perceptions of work life balance policies; those ones also appear to be strongly connected to the manager behavior and its management style. The categorization of perceptions (progressist/ traditionalist/ neutral/ hostile) contributes to a better understanding of their influence on gender equality, and reveals that inequalities awareness –stronger amongst Spanish employees- is a prior condition for a more equal work life balance.
698

Performance Analysis Of MAC Layer Of High Rate Wireless Personal Area Network (HR WPAN)

Mishra, Rajan 07 1900 (has links) (PDF)
No description available.
699

NEW TRENDS IN DEVELOPING MANAGERIAL COMPETENCIES FOR MODERN COMPANIES: APPLICABILITY OF MUSIC IN IMPROVING BUSINESS EFFICIENCY AND WORKING ENVIRONMENT

Smiljanić, Dušan January 2009 (has links)
Practical approach to the issue of music applicability is a multi-disciplinary taking into account the complexity of working environment, personality of modern managers and the sole human nature. Musical map could serve to HR experts in building innovative programs of staff training in accordance with organization' preferences and individuals uniqueness. Recent investigations of the connection between music and motivation, music and team work, music and creativity, music and learning process, are opening numerous options for practical applicability of music in working environment aimed at increasing existing competencies and developing the new ones. The need for an increase in staff performances has imposed a need to explore how musical practice can support creation and implementation of realistic organizational goals in intercultural environment. The main goal of this doctoral thesis is to examine musical preferences and applicability of music with its positive effects on different aspects of working environment, creating thus, via empirical research, a musical map of geographical region that could be employed to increase working performance and efficiency. In order to achieve the goals defined, a field research has been conducted via structured questionnaire including 6 socio-demographic variables (gender, age, educational degree, position in the organization, sector and working experience) and 6 dependant variables (working atmosphere, efficiency in accomplishing tasks at work, motivation, learning, team work and stress reduction). The research was conducted in Serbia, on a random sample of 126 managers and employees in Belgrade, Novi Sad and Novi Pazar. The main hypothesis was that applicative music positively affects creation of proper corporative ambient and improvement of employees' competences, and was tested via 13 auxiliary hypotheses. Main empirical outcome of the Ph.D. thesis research is the determination of Serbian working population Musical Map and results of influence of certain socio-demographic and professional factors on the Musical Map Method implementation. HR staff would subsequently implement the "concept of musical map method" within its own company that is expected to increase motivation, learning and creativity as shown empirically in the study conducted. Also team work and working efficiency are expected to increase and stress at work to decrease under the proper musical exposition and all of these are explicitly shown in the thesis research results. In addition, influence of the degree of education on musical preference at work place and in general are the most surprising data, as revealed by chi square test if independence. Although general statistics of total sample on participant's opinion, speaks in favour of hypotheses confirmation expressing positive effects of music on 6 dependent variables, there are some fine differences, influenced by cardinal and derived variables, as shown by one way ANOVA test (e.g. influence of gender on opinion of positive music effects on stress reduction etc.). The final result of the thesis is the creation of the Musical Map Method that contains original approach toward creation of musical map and determination of the necessary factors that could substantially influence its implementation. Method could be applied anywhere in the Globe to produce other unique music maps as per sponsor request.
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Study of evolution in human resources management programs in organizations. Application of "Path Dependence" and "Cladistics"

Perelló Marín, María Rosario 01 September 2015 (has links)
[EN] This doctoral thesis analyses human resources management evolution in organizations. That is, changes introduced throughout people management. The key objective is to analyze how organizations evolve and change over time by means of human capital. Recent years have demonstrated that levels of adjustment and change required by organizations in order to adapt to a changing environment, are increasingly high. One of the main drivers behind this organizational change, is the introduction of new programs and tools that help organizations to improve their business performance. This work is focused on the identification and analysis of such programs in the field of human resources management. In particular: what sort of HRM practices are implemented, in what sort of organization, at which point in time, and finally, in which order. Although there are numerous studies to date analyzing HRM practices, none of them introduce methodologies that consider order or time factor within the management process of HR. This is the reason why 'path dependence' and 'cladistics' approaches are introduced in this doctoral thesis. 'Path dependence' approach shows how certain management decision taken at a certain point of time, influence future decisions. This makes it all the more essential to press ahead with analysis of where we come from and which path we have followed before being designed the future strategy of the organization. According to this approach, throughout this doctoral thesis, cladistics is used as methodology for analyzing organizations from a different perspective of people management compared to the habitual viewpoints. Cladistics is a methodology that can be used in the decision-making process; moreover, it allows identifying the expected result of implementing certain bundles of HRM practices, taking also into account HRM practices already implemented. It considers therefore, also prior organization history. This methodology, for the analysis and classification, has been commonly used in the field of biology for many years. Throughout this doctoral thesis, the transference of this methodology to HRM is shown. Biologist use Cladistics in order to build evolutionary maps termed as cladograms. Cladograms are graphic representations of animal species evolution. This methodology has already been used in fields other than biology, such as linguistics or astronomy among others. In management, it has not yet been developed sufficiently; in particular, the most relevant examples in this field are in operations management area. The purpose of this work is to extrapolate the basics of Cladistics to HRM field. In doing so, HRM practices have been analyzed, such as personnel selection, rewards systems, appraisal systems, training, etc¿ The bundle of HRM practices that certain organization has been implemented at certain point of time will determine what kind of organization is. Thus, a evolutionary map is built. It can be use as a benchmarking tool in order to analyze what sort of HRM practices has been implemented by competitors, haw far they have gone, and in what sort of organization have become. In this work, a simple example of evolution in time of Spanish manufacturing companies is shown. The organization growth in size (number of employees) has been considered as evolutionary factor. This is due to the fact that, as number of employees increase, HRM programs have to be different. Furthermore, a preliminary application of Cladistics is offered in hospitality sector. / [ES] La presente tesis estudia la evolución del sistema de gestión de recursos humanos en las organizaciones. Es decir, cambios introducidos a través de la gestión de personas. El objetivo principal de la tesis es analizar cómo las empresas van evolucionando y cambiando en el tiempo a través del capital humano. En los últimos años se ha demostrado que los niveles de adaptación y cambio que requieren las organizaciones para adaptarse a su entorno cambiante, son cada vez más elevados. Uno de los motores que facilitan este cambio organizacional, es la introducción de nuevos programas de gestión y herramientas que ayuden a las organizaciones a mejorar sus resultados empresariales. Este trabajo se centra en la identificación y análisis de estos programas en el ámbito de la gestión de RRHH. En particular: qué prácticas de RRHH se implementan, en qué tipo de empresas, en qué momento y, por último, en qué orden. Aunque ya existen numerosos estudios que analizan las prácticas de RRHH, hasta el momento, no existen herramientas que introduzcan el factor orden o tiempo en este proceso gestión de RRHH. Ésta es la causa por en esta tesis se utilizan los enfoques de 'path dependence' y 'cladistics'. El concepto de 'Path dependence', muestra cómo las decisiones de gestión que son tomadas en un momento determinado, influyen en las decisiones futuras. Este hecho hace que, antes de diseñar la estrategia a seguir en el futuro, se haya de analizar de dónde venimos y que camino se ha seguido para llegar hasta aquí. Bajo este enfoque, a lo largo de esta tesis, se utiliza la cladística como metodología de análisis de las organizaciones desde una perspectiva de gestión de personas diferente a las habituales en este ámbito. La Cladistica es una metodología que puede ser empleada como herramienta de toma de decisiones, y que permite identificar qué resultado se obtendría tras implantar un conjunto determinado de prácticas de gestión de RRHH, en función de las que ya se han implantado previamente (y por tanto de la historia previa de la organización). Esta metodología de análisis y clasificación ha sido comúnmente empleada en el ámbito de la biología y a lo largo de la presente tesis, se muestra cómo puede transferirse a la gestión de RRHH. Los biólogos, emplean la Cladística para la construcción de mapas evolutivos denominados cladogramas. Éstos son representaciones gráficas de la evolución de las especies animales. Si bien esta metodología se ha empleado ya en otros ámbitos diferentes a la biología, tales como la lingüística o la astronomía entre otros; en el área de management se ha desarrollado poco aún estando enmarcados los ejemplos más relevantes en el área de la gestión de operaciones. En este trabajo se extrapolan los conceptos básicos de la Cladistica al área de la gestión de recursos humanos. Para ello se estudian las prácticas de recursos humanos, tales como la selección de personal, sistemas de retribución, sistemas de evaluación, formación, etc¿ El tipo de prácticas de RRHH que ha seguido una determinada organización a lo largo del tiempo, es lo que determinará a qué tipo de organización pertenecen. Así, se construye un mapa evolutivo que puede emplearse como herramienta de benchmarking para ver qué practicas han implementado otros, dónde han llegado con ello y en qué tipo de organización se han convertido. En esta tesis se muestra un ejemplo sencillo de evolución en el tiempo de empresas en el sector manufacturero español, considerando como factor evolutivo el crecimiento en tamaño de organización (número de empleados). Entendiendo que, a medida que se incrementa el número de empleados, los programas de gestión de personas han de ser diferentes. Así mismo, se presenta una aplicación preliminar de la Cladistica al sector hospitality. / [CAT] Aquesta tesi estudia l'evolució del sistema de gestió de recursos humans a les organitzacions. És a dir, els canvis realitzats a través de la gestió de persones. L'objectiu principal de la tesi és analitzar com les empreses estan evolucionant i canviant en el temps a través de la capital humà. En els darrers anys s'ha demostrat que els nivells d'adaptació i canvi que requereixen les organitzacions a adaptar-se al seu entorn canviant, són cada cop més elevats. Un dels motors que facilita aquest canvi organitzacional és la introducció de nous programes de gestió i ferramentes que ajuden les organitzacions a millorar els seus resultats de negoci. Aquest treball es centra en la identificació i anàlisi d'aquests programes en l'àmbit de gestió de recursos humans. En particular: quines pràctiques RRHH estan implementades, a quin tipus d'empreses, quan i, finalment, en quin ordre. Encara que hi ha nombrosos estudis que analitzen les pràctiques RRHH, fins ara, no hi ha cap ferramenta que introdueixen el factor ordre o temps en aquest procés de gestió de recursos humans. Aquesta és la raó per la cual s'utilitzen en aquesta tesi els enfocaments de "dependència del camí' i 'cladística'. El concepte de "Path dependence", mostra com les decisions de gestió que es prenen en un moment donat, influencien les decisions futures. Això significa que, abans de dissenyar l'estratègia a seguir en el futur, cal analitzar d'on venim així com el camí que s'ha seguit per arribar fins ací. Davall este enfocament, al llarg d'esta tesi, s'utilitza la cladística com a metodologia d'anàlisi de les organitzacions des d'una perspectiva de gestió de persones diferent de les habituals en este àmbit. La Cladistica és una metodologia que pot ser empleada com a ferramenta de presa de decisions, i que permet identificar què resultat s'obtindria després d'implantar un conjunt determinat de pràctiques de gestió de RRHH, en funció de què ja s'han implantat prèviament (i per tant de la història prèvia de l'organització). Esta metodologia d'anàlisi i classificació ha sigut comunament empleada en l'àmbit de la biologia i al llarg de la present tesi, es mostra com pot transferir-se a la gestió de RRHH. Els biòlegs, usen la Cladística per a la construcció de mapes evolutius denominats cladogramas. Aquests són representacions gràfiques de l'evolució d'spècies animals. Si bé esta metodologia s'ha utilitzat ja en altres àmbits diferents de la biologia, com ara la lingüística o l'astronomia entre altres; en l'àrea de management s'ha desenvolupat poc encara, estant emmarcats els exemples més rellevants en l'àrea de la gestió d'operacions. En aquest treball s'extrapolen els conceptes bàsics de la Cladistica a l'àrea de la gestió de recursos humans. Per a això s'estudien les pràctiques de recursos humans, com ara la selecció de personal, sistemes de retribució, sistemes d'avaluació, formació, etc... Les pràctiques de recursos humans que ha seguit una organització particular al llarg del temps, és el que determinarà a quin tipus d'organització pertanyen. Així, es construïx un mapa evolutiu que es pot utilitzar com a ferramenta de benchmarking per a veure què practiques ha implementat la competnecia, a on han arribat amb això, i en quin tipus d'organització s'han convertit. A aquesta tesi es mostra un exemple senzill d'evolució en el temps d'empreses en el sector manufacturer espanyol, considerant com a factor evolutiu el creixement en grandària de l'organització (nombre d'empleats) . Entenent que, a mesura que s'incrementa el nombre d'empleats, els programes de gestió de persones han de ser diferents. Així mateix, es presenta una aplicació preliminar de la Cladistica al sector hospitality. / Perelló Marín, MR. (2015). Study of evolution in human resources management programs in organizations. Application of "Path Dependence" and "Cladistics" [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/54110 / TESIS

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