• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • 2
  • 1
  • Tagged with
  • 5
  • 5
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 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.
1

Fatores operacionais na manutenção da eficiência de um reator UASB compartimentado tratando esgoto sanitário / Operational factors in the efficiency maintenance of a compartmentalized UASB reactor treating sewage

Prampero, Julio Cesar 02 March 2017 (has links)
Submitted by Julio Cesar Prampero (julioprampero@gmail.com) on 2018-01-03T12:22:46Z No. of bitstreams: 1 Prampero Final.docx: 3342948 bytes, checksum: 0c54b7943bcafe48a5c9f4e8ebd1e22b (MD5) / Approved for entry into archive by Cristina Alexandra de Godoy null (cristina@adm.feis.unesp.br) on 2018-01-03T16:12:35Z (GMT) No. of bitstreams: 1 prampero_jc_me_ilha.pdf: 2633899 bytes, checksum: a73c895b49de1331ba315bc5da611a42 (MD5) / Made available in DSpace on 2018-01-03T16:12:35Z (GMT). No. of bitstreams: 1 prampero_jc_me_ilha.pdf: 2633899 bytes, checksum: a73c895b49de1331ba315bc5da611a42 (MD5) Previous issue date: 2017-03-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O uso de inovações estruturais em reatores UASB (Upflow Anaerobic Sludge Blanket) para sua utilização no tratamento de esgoto doméstico, como a compartimentação, é uma alternativa para aprimorar um sistema de tratamento simples e eficiente. Projetado com configuração estrutural inovadora o Reator UASB Compartimentado (RUC) utilizado foi operado em fluxo contínuo com esgoto sanitário do município de Ilha Solteira- SP. Objetivando a avaliação da eficiência do RUC quanto a seus fatores operacionais, a pesquisa foi dividida em quatro etapas. O RUC foi submetido e operado a uma carga orgânica de 1,21kgDQO/d e temperatura ambiente média de 22,47°C, alcançando médias de 74% de remoção de DQO e até 87%. Para remoção de nutrientes foram atingidas médias de 36% para Nitrogênio Total e 44% para Fósforo Total, com máximas de 63 e 64%, respectivamente. Demandou pouca operação de manutenção e baixa produção de lodo. Durante todo período de atividade deparou-se com diversos problemas operacionais, tais como: acúmulo de gordura, tanto na câmara de gases quanto aderida ao lodo, os quais levaram a obstrução do sistema de saída e equipamento de monitoramento dos gases, resultando na perda de eficiência e consequentemente, necessitando de descarga completa e reinoculação do RUC. / The use of structural innovations in UASB (Upflow Anaerobic Sludge Blanket) reactors for use in the sewage treatment, such as compartmentation, is an alternative to improve a simple and efficient treatment system. In an innovative structural configuration, the Compartmented UASB Reactor (CUR) used was run in continuous, using Ilha Solteira - SP municipal sewage. To evaluate the CUR efficiency as for operational factors, this research was divided in four steps. The CUR was submitted to an organic load of 1.21kgCOD/day, operated at average temperature of 22.47°C, showed average COD removal of 74%, reaching up to 87%. The nutrient removal average were 36% for Total Nitrogen and 44% for Total Phosphorus reached maximums of 63 and 64%, respectively. The reactor presented low maintenance and sludge production. During all time CUR come across operational troubles such as: fat accumulation in gas chamber and adhered to the sludge, which causing the obstruction of the exhaust system and monitoring device, resulted in efficiency loss and the needed to sludge discard and re-inoculation to restart.
2

Fatores operacionais na manutenção da eficiência de um reator UASB compartimentado tratando esgoto sanitário /

Prampero, Julio Cesar January 2017 (has links)
Orientador: Tsunao Matsumoto / Resumo: O uso de inovações estruturais em reatores UASB (Upflow Anaerobic Sludge Blanket) para sua utilização no tratamento de esgoto doméstico, como a compartimentação, é uma alternativa para aprimorar um sistema de tratamento simples e eficiente. Projetado com configuração estrutural inovadora o Reator UASB Compartimentado (RUC) utilizado foi operado em fluxo contínuo com esgoto sanitário do município de Ilha Solteira- SP. Objetivando a avaliação da eficiência do RUC quanto a seus fatores operacionais, a pesquisa foi dividida em quatro etapas. O RUC foi submetido e operado a uma carga orgânica de 1,21kgDQO/d e temperatura ambiente média de 22,47°C, alcançando médias de 74% de remoção de DQO e até 87%. Para remoção de nutrientes foram atingidas médias de 36% para Nitrogênio Total e 44% para Fósforo Total, com máximas de 63 e 64%, respectivamente. Demandou pouca operação de manutenção e baixa produção de lodo. Durante todo período de atividade deparou-se com diversos problemas operacionais, tais como: acúmulo de gordura, tanto na câmara de gases quanto aderida ao lodo, os quais levaram a obstrução do sistema de saída e equipamento de monitoramento dos gases, resultando na perda de eficiência e consequentemente, necessitando de descarga completa e reinoculação do RUC. / Abstract: The use of structural innovations in UASB (Upflow Anaerobic Sludge Blanket) reactors for use in the sewage treatment, such as compartmentation, is an alternative to improve a simple and efficient treatment system. In an innovative structural configuration, the Compartmented UASB Reactor (CUR) used was run in continuous, using Ilha Solteira - SP municipal sewage. To evaluate the CUR efficiency as for operational factors, this research was divided in four steps. The CUR was submitted to an organic load of 1.21kgCOD/day, operated at average temperature of 22.47°C, showed average COD removal of 74%, reaching up to 87%. The nutrient removal average were 36% for Total Nitrogen and 44% for Total Phosphorus reached maximums of 63 and 64%, respectively. The reactor presented low maintenance and sludge production. During all time CUR come across operational troubles such as: fat accumulation in gas chamber and adhered to the sludge, which causing the obstruction of the exhaust system and monitoring device, resulted in efficiency loss and the needed to sludge discard and re-inoculation to restart. / Mestre
3

Unveiling the Digital Shift: Exploring the Changing Landscape of Work in Banking

Memedovski, Elmas, Keryakos, Ninos January 2023 (has links)
Background: The advent of digitalization has significantly impacted various aspects of society. Digitalization has aided in the growth of more ecologically friendly practices, and remote work hasreduced the usage of cars and lowered carbon emissions. However, existing literature has indicated that it also has resulted in new challenges such as privacy concerns, cybersecurity threats, and the need fordigital skills. The Covid-19 pandemic acted as a catalyst for digitalization, leading to an accelerated trend towards remote and flexible work. The financial sector has also undergone significant changes with the adoption of new technologies. Research on how digital transformation has changed the structural configuration in the banking industry is heavily undeveloped. Notwithstanding, digitalization continues to shape how society lives and interacts with each other. Purpose: The purpose of this thesis is to examine the influence of digitalization in banking and to comprehend the alterations that have transpired in the structural configuration due to the growing utilization of technology. An evaluation from the standpoint of employees can provide valuable insights into how digitalization has influenced work in the banking industry. This research can offer significant assistance to decision-makers in the banking industry as they devise strategies to adapt to the digital ageand foster a favorable work atmosphere for their employees. Method: This qualitative, exploratory thesis, which was guided by an abductive approach, made use of amore comprehensive understanding of the topic at hand. A thematic analysis was utilized as a guide wheninterpreting and analyzing the data from 10 semi-structured interviews. Conclusion: Digitalization has revolutionized employees’ work, demanding more collaboration and knowledge sharing. The effect of Covid-19 as the driving catalyst toward digitalization accelerated thischange and urged adaptation to external events. To meet evolving customer behavior, investing in digitalsolutions with a human touch is crucial. Ongoing education is vital for enhancing digital skills. Job losses are a concern due to increased digital efficiency. The banking industry must invest in employees andembrace adaptability. The future holds both challenges and opportunities as technology continues toadvance.
4

L'impact d'un changement de structure organisationnelle sur la prise de décision : le cas de l'introduction des pôles à l'hôpital public / The impact of a change in organizational structure on decision-making : the case of the introduction of cluster in the public hospital

Vallejo, Jimmy 18 June 2018 (has links)
Depuis les années 1990, le Nouveau Management Public a transformé l’hôpital public, on parle d’un tournant gestionnaire. L’apparition des pôles d’activité médicale en 2005, consiste en une nouvelle gouvernance hospitalière. Nous avons cherché comprendre comment les pôles d’activité médicale font-ils évoluer les processus de décisions ? Nous avons choisi de mobiliser le concept de configuration structurelle (Mintzberg, 1982) et la théorie de l’anarchie organisée (Cohen, March et Olsen, 1972). La question est désormais de savoir si le changement de configuration structurelle va accroître ou réduire l’anarchie organisée ? Pour y répondre nous avons réalisé deux phases de récolte de données dans un CHU : l’analyse de la gestion quotidienne de trois pôles et de deux projets de pôle. Notre étude de cas a permis de mettre en évidence que l’hôpital n’est pas devenu une structure divisionnalisée mais qu’il est en transition, dans une configuration structurelle hybride. Les pôles ont eu tendance à augmenter l’anarchie organisée et le slack organisationnel pour l’heure. Notamment à cause de l’influence du contexte économique, l’absence de contrats de pôle, le problème de formation des agents et une opposition constante entre gestionnaires et médicaux. Les pôles se présentent comme de nouvelles unités qui ont rendu plus complexe l’organisation interne. Cependant, l’arrivée des pôles s’est accompagnée d’une redistribution des rôles, de nouveaux outils de gestion et de nouveaux processus de gestion. Ainsi, le changement de configuration structurelle a impacté le processus de décision de l’hôpital, en modifiant les pratiques et les cadres de ces processus de décision. / Since the 1990s, the New Public Management has transformed the public hospital, we talk about a turning management. The emergence of medical activity centers in 2005, consists of a new hospital governance. We sought to understand how the poles of medical activity are changing decision-making processes? We have chosen to mobilize the concept of structural configuration (Mintzberg, 1982) and the theory of organized anarchy (Cohen, March and Olsen, 1972). The question now is whether the change in structural configuration will increase or reduce organized anarchy? To answer this question, we conducted two data collection phases in a CHU: the analysis of the daily management of three clusters and two cluster projects. Our case study revealed that the hospital has not become a divisionalized structure but is in transition, in a hybrid structural configuration. The poles tended to increase organized anarchy and organizational slack for the time being. Notably because of the influence of the economic context, the absence of pole contracts, the problem of training agents and a constant opposition between managers and medical staff. The poles are new units that have made the internal organization more complex. However, the arrival of the clusters has been accompanied by a redistribution of roles, new management tools and new management processes. Thus, the change in structural configuration has impacted the hospital's decision-making process by changing the practices and frameworks of these decision-making processes.
5

Méthodologies de conception préliminaire de machines-outils : application à l'usinage des pièces aéronautiques en titane / Preliminary design methodologies for machine tools : application for the machining of titanium aeronautical parts

Lajili, Montassar 11 January 2019 (has links)
Les exigences de productivité et de qualité dans l’industrie aéronautique imposent d’avoir des machines-outils optimisées en termes de précision, de cinématique et de dynamique. L’objectif des travaux de recherche menés est de proposer de nouvelles méthodologies de conception de machines-outils à haute rigidité pour l’usinage des pièces aéronautique en titane. Dans un premiers temps, la problématique du choix de la configuration structurale la plus adéquate au procédé d’usinage envisagé est traitée en proposant une méthode de synthèse et de sélection basée sur des critères qualitatifs. L’analyse des performances des différentes configurations structurales relatives aux critères qualitatifs adoptés permet de les classer. Les résultats obtenus ont permis d’aboutir à un ensemble restreint de configurations structurales de machines-outils adéquates au procédé d’usinage des pièces aéronautiques en titane. Pour compléter cette méthode, il est alors nécessaire de développer une approche d’analyse quantitative des arrangements structuraux relatifs à chaque configuration structurale. Dans un second temps, une nouvelle approche de sélection des arrangements structuraux de machines-outils est développée. Cette approche consiste tout d’abord à élaborer des modèles réduits des structures de machines-outils considérées. Ensuite, nous mettons en œuvre une optimisation paramétrique en vue de minimiser la masse totale des structures mécaniques de ces machines tout en respectant une contrainte de rigidité cible. Cette optimisation est réalisée par un couplage entre MATLAB et ANSYS APDL. Enfin, le classement des arrangements structuraux selon leurs performances met en évidence ceux les plus appropriés au procédé d’usinage des pièces aéronautiques en titane. Alors ces travaux participent à l'évolution des méthodologies de conception des nouvelles machines d'usinage. / Productivity and quality requirements in the aerospace industry require optimized machine tools in terms of precision, kinematics and dynamics. The objective of this thesis is to propose new methodologies for the design of highly stiffened machine tools for machining titanium aeronautical parts. First, the issue of choosing the most appropriate structural configuration for the machining process is handled by proposing a synthesis and selection method based on qualitative criteria. The performance analysis of the different structural configurations relative to the adopted qualitative criteria makes it possible to classify them. The results obtained have led to a limited set of structural configurations of machine tools suitable for the process of machining titanium aeronautical parts. To complete this method, it is then necessary to develop an approach for quantitative analysis of the structural arrangements corresponding for each structural configuration. In a second step, a new approach for the selection of structural arrangements of machine tools is developed. This approach consists firstly in developing reduced models of considered machine tool structures. Then, we implement a parametric optimization in order to minimize the total mass of the mechanical structures of these machines while under the constraint of a target stiffness. This optimization is achieved by coupling MATLAB and ANSYS APDL. Finally, the classification of structural arrangements according to their performance highlights those most appropriate for the process of machining titanium aeronautical parts. This work contributes to the evolution of design methodologies for new machining machines.

Page generated in 0.1287 seconds