Η παρούσα εργασία ασχολείται με τη μελέτη των τεχνολογιών ανάπτυξης εφαρμογών σε περιβάλλον φορητών συσκευών και συγκεκριμένα σε Windows Phone 7.5 (ή Mango) συσκευές. Ιδιαίτερα δόθηκε έμφαση στη δημιουργία πολυμεσικών εφαρμογών πολιτισμικού περιεχομένου, οι οποίες θα είναι όχι μόνο λειτουργικές αλλά θα διαθέτουν επίσης ένα φιλικό περιβάλλον διεπαφής έτσι ώστε να αποτελούν μια ευχάριστη εμπειρία για τον τελικό χρήστη. Με αφορμή αυτό το ερέθισμα, σχεδιάσαμε και αναπτύξαμε το Museum Guide – ένα ολοκληρωμένο περιβάλλον διαχείρισης περιεχομένου που έχει σαν στόχο την ξενάγηση σε ένα χώρο πολιτισμού, όπως για παράδειγμα ένα μουσείο, εκμεταλλευόμενο τις πολλές δυνατότητες που προσφέρει μια Windows Phone 7.5 συσκευή. Έτσι χρησιμοποιώντας το Museum Guide ο επισκέπτης του μουσείου μπορεί να βλέπει τα εκθέματα καθώς και συνοδευτικό υλικό που περιλαμβάνει κείμενο, εικόνες, αρχεία ήχου και βίντεο. Επιπλέον μπορεί να επιλέγει κάποια από αυτά τα εκθέματα ως αγαπημένα και να μοιράζεται τις εμπειρίες του με τα υπόλοιπα μέλη της ομάδας του μέσω άμεσων μηνυμάτων. Για τη λειτουργία των άμεσων μηνυμάτων δημιουργήσαμε έναν ενσωματωμένο messenger που λειτουργεί πάνω από xmpp πρωτόκολλο με τη βοήθεια της βιβλιοθήκης Matrix. Εκτός από τα παραπάνω, το Museum Guide δίνει τη δυνατότητα στον χρήστη να λάβει πληροφορίες για ένα συγκεκριμένο έκθεμα, βγάζοντας απλά μια φωτογραφία τού εν λόγω εκθέματος με την κάμερα του κινητού. Την λειτουργία αυτή την ονομάζουμε on-demand ξενάγηση και δόθηκε ιδιαίτερη έμφαση στον αλγόριθμο με βάση τον οποίο γίνεται η αναγνώριση της φωτογραφίας που βγάζει ο χρήστης. Για το σκοπό αυτό μελετήσαμε και αξιολογήσαμε διάφορους αλγορίθμους αναγνώρισης εικόνας και καταλήξαμε στη χρήση hashing τεχνικών με τη βοήθεια της βιβλιοθήκης pHash. / The current thesis is on study of application development technologies in portable devices environment and namely in Windows Phone 7.5 (or Mango) devices. Especially emphasis was placed on creation of multimedia applications with cultural content which will not only be functional but also have a friendly interface in order to be a pleasant experience for the end user. In response to this stimulus, we designed and developed the Museum Guide – an integrated content management environment which aims at guidance in an area of culture, for example a museum, exploiting the capabilities of a Windows Phone 7.5 device. Thereby the visitor of the museum can use the Museum Guide to see the exhibits as well as accompanying material including text, photos, audios and videos. Additionally the visitor can mark any of these exhibits as favorites and share their experiences with the other members of their group through instant messages. For the operation of instant messaging, we have created an embedded messenger which works over the xmpp protocol using the Matrix library. Besides the above, the Museum Guide gives to the user the opportunity to receive information about a specific exhibit, just taking a photo of this exhibit with phone’s camera. We call this operation on-demand guidance and we emphasized especially on the algorithm of user’s photo recognition. For this purpose we studied and evaluated various image recognition algorithms and came to the conclusion to use hashing techniques with help of pHash library.

O incremento nos padrões de consumo de energia elétrica e o fácil acesso a diversas tecnologias eletroeletrônicas têm contribuído para a superação anual dos índices de consumo de eletricidade. Tendo em vista que esse insumo ainda não é economicamente armazenável em larga escala, se faz necessário manter o equilíbrio em tempo real entre a oferta/demanda mais perdas. Entretanto, a maioria dos consumidores brasileiros atendidos em baixa tensão paga tarifas baseadas nos custos médios, os quais ocultam os efeitos da alta concentração de consumo de eletricidade em determinados horários do dia. Nesse contexto, o presente estudo analisa o impacto que Programas de Resposta à Demanda (PRD), baseado em tarifas com diferenciação horária, exercem sobre o desempenho dos sistemas de distribuição. A metodologia proposta utiliza o conceito de elasticidade-preço da demanda de energia elétrica, por meio de uma abordagem matricial e permite representar diferentes tipos de consumidores. A partir de uma análise de sensibilidade dos estudos de casos, verificou-se a influência dos parâmetros que compõem as equações do PRD proposto. Para avaliar o desempenho do modelo, foram feitos estudos numéricos usando uma versão modificada do sistema teste IEEE de 34 nós. A análise de sensibilidade entre os estudos de caso apresentou uma avaliação do percentual de adesão dos consumidores, bem como o comportamento das perdas ativas mensais e do perfil de tensão. Os resultados obtidos no presente estudo evidenciam a validade da abordagem proposta, a partir de uma formulação simplificada, além de demonstrar a potencial aplicabilidade a casos reais. / Power consumption behavior increase and easy access to electroelectronics technologies had contributed to annual power consumption rates surpass. As there is not yet an economically sustainable way to store electric power it is necessary to maintain the balance between offer and power demand (considering losses). Brazilian customers majority supplied in low voltage are charged by its mean power consumption masking peak consumption in certain periods of the day. Within this reality the present work analysis the impact of Demand Response Programs (DRP) using Time-Of-Use tariff (TOU) over the power distribution system’s performance. The proposed methodology applies the concept of Price Elasticity demand and uses the representation of different consumers’ types in a matrix approach. The DRP parameters’ variation impact was checked using a sensitivity analysis. In order to evaluate the performance of the proposed model numerical studies were done using the IEEE 34 modified node test feeder. A sensitivity analysis among the case studies presents the customers adherence percentage and the monthly active power losses and voltage profile. The methodology's results besides supporting the proposal approach from a simplified formulation show the potential use on real cases.

The purpose of this study was to determine whether College of Education graduates who sought and secured employment as teachers differed on the academic variables of grade point average, student teaching evaluation, and professional recommendations from those who were not successful at securing such employment. A comprehensive review of related literature was conducted, focusing on three aspects of the employment situation: (1) teacher supply and demand, (2) the selection process, and (3) the role played by academic criteria in the selection process. A study was conducted in which students who were successful in finding teaching positions were compared with those who were not successful, on the academic variables of grade point average, student teaching evaluation, and professional recommendations. Demographic data were also collected and analyzed. The subjects were sixty-three randomly selected students from the May 19 80 graduating class of the College of Education, North Texas State University, Denton, Texas. For purposes of statistical analysis, the students were divided into the following three groups: Group A (those who successfully sought employment as teachers), Group B (those who sought such employment but were not successful), and Group C (those who did not seek employment as teachers).

Made available in DSpace on 2014-10-09T12:26:54Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:00:52Z (GMT). No. of bitstreams: 0 / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

Submitted by MARIO AUGUSTO MATOS SIMON ESTEVES (marioaugustoesteves@gmail.com) on 2016-12-21T01:17:05Z No. of bitstreams: 1 Dissertacao de Mestrado - Mario Esteves - Final.pdf: 3642994 bytes, checksum: 14617df83472dcb04e1f218abfd26cd4 (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-12-22T12:43:08Z (GMT) No. of bitstreams: 1 esteves_mams_me_guara.pdf: 3642994 bytes, checksum: 14617df83472dcb04e1f218abfd26cd4 (MD5) / Made available in DSpace on 2016-12-22T12:43:08Z (GMT). No. of bitstreams: 1 esteves_mams_me_guara.pdf: 3642994 bytes, checksum: 14617df83472dcb04e1f218abfd26cd4 (MD5) Previous issue date: 2016-10-21 / Com o contínuo crescimento da competitividade global, o grande desafio é trabalhar de forma enxuta, mas sem prejudicar o nível de serviço ao cliente. Para isso, busca-se uma rápida e adequada integração das necessidades do mercado na direção dos fornecedores, de modo a balancear e alinhar estrategicamente a demanda com a capacidade operacional ao longo de toda a cadeia de suprimentos. Para a presente pesquisa, utilizou-se levantamento do tipo survey, e o objetivo geral é verificar o panorama atual das práticas de Gestão de Demanda e Previsão de Demanda nas indústrias da Cadeia de Suprimentos Automotiva Brasileira, identificando as principais práticas utilizadas e as principais dificuldades relacionadas à execução dos processos de gestão e previsão de demanda, bem como as consequências causadas pelas variações e incertezas de demanda. Para tanto, com base na revisão da literatura e no método hipotético dedutivo de Popper, foi elaborado um questionário que foi respondido por 37 empresas da cadeia de suprimento automotiva dos mais diversos setores. Os resultados mostram que as empresas da cadeira de suprimento automotiva fazem uso com predominância de técnicas mais simples como opiniões de executivos e da equipe de vendas e utilização de médias móveis. A falta de disponibilidade de dados, a necessidade de capacitação e treinamento da equipe e a deficiencia no conhecimento dos modelos e ferramentas de previsão de demanda aparecem como as maiores barreiras para elaboração das previsões de demanda. / With the continued growth of global competitiveness, the challenge is to work lean way, but without affecting the level of customer service. As a result, a quick and proper integration of the market requirements towards suppliers should be sought, in order to balance and strategically align the demand with the operational capacity along the entire supply chain. This research use the survey method and the overall objective is to find what the current situation of Demand Management and Demand Forecasting practices in the industries of Brazilian Automotive Supply Chain, identifying the main practices and the difficulties related to the implementation of the management and demand forecasting processes, as well as those caused consequences as a result of variations and demand uncertainties. Therefore, based on the literature review and popper´s hypothetico-deductive method, it has been designed a questionnaire that was answered by 37 companies in the automotive supply chain in various sectors. The results show that companies in the automotive supply chair make use predominantly of the simplest techniques as executive and sales force opinion methods and use of moving averages. The lack of availability of data, the need of professional training and deficiency of knowledge of the models and demand forecasting tools appear as major barriers to development of demand forecasts.

A demand-driven growth model involving capital accumulation and the dynamics of greenhouse gas (GHG) concentration is set up to examine macroeconomic issues raised by global warming, e.g. effects on output and employment of rising levels of GHG; offsets by mitigation; relationships among energy use and labor productivity, income distribution, and growth; the economic significance of the Jevons and other paradoxes; sustainable consumption and possible reductions in employment; and sources of instability and cyclicality implicit in the twodimensional dynamical system. The emphasis is on the combination of biophysical limits and Post- Keynesian growth theory and the qualitative patterns of system adjustment and the dynamics that emerge. / Series: Ecological Economic Papers

Thesis submitted in fulfillment of the requirement for the degree Master of Education in the Faculty of Education and Social Science at the Cape Peninsula University of Technology, 2012 / Education has become an area of concern both in South Africa and the rest of the world. As a result there has been an increase of about one per cent on the average number of learners in South Africa schools (Collin, 2005), especially with the ‘education for all’ policy. Learner increase requires large numbers of teachers because they play a critical role in achieving the post-apartheid transformation and development agenda (Asmal, 1999). However, there are many disturbing reports that point towards large numbers of teachers leaving the education profession in both primary and secondary sectors. Many factors have rendered education an area of distress both in the Western Cape, South Africa and elsewhere in the world today. One of these factors is the mismatch between demand and supply of teachers which is arguably exacerbated by shortage of teachers. The aim of this study is to (i) uncover factors that influence demand, supply and shortages of teachers among a select Western Cape Secondary Schools in order to (ii) primarily explore mechanisms and strategies that the selected schools employ for combating teacher demands, supply and shortages. The question following from these aims is: “How do some secondary schools in the Western Cape manage the tensions created by demand, supply and shortages of teachers?” The study employs the qualitative research method that has utilised an exploratory research design to meet the research objectives. Secondary school teachers, principals, ex-secondary school teachers and deans/directors of schools/faculties of education make up the target population for this study. The sample constituted thirty participants that were purposefully and conveniently selected. The finding in the study reveals that teacher demand and supply in the Western Cape is influenced by similar factors that occur elsewhere in the world. However the schools employ many ways to deal with teacher shortages, some of which are preventative or curative of the problem of teacher shortages. What is worth-noting is that since public schools in Western Cape are owned and funded by the provincial government, principals are limited in what they can do as most of the strategies require a high level of monetary commitment.

O incremento nos padrões de consumo de energia elétrica e o fácil acesso a diversas tecnologias eletroeletrônicas têm contribuído para a superação anual dos índices de consumo de eletricidade. Tendo em vista que esse insumo ainda não é economicamente armazenável em larga escala, se faz necessário manter o equilíbrio em tempo real entre a oferta/demanda mais perdas. Entretanto, a maioria dos consumidores brasileiros atendidos em baixa tensão paga tarifas baseadas nos custos médios, os quais ocultam os efeitos da alta concentração de consumo de eletricidade em determinados horários do dia. Nesse contexto, o presente estudo analisa o impacto que Programas de Resposta à Demanda (PRD), baseado em tarifas com diferenciação horária, exercem sobre o desempenho dos sistemas de distribuição. A metodologia proposta utiliza o conceito de elasticidade-preço da demanda de energia elétrica, por meio de uma abordagem matricial e permite representar diferentes tipos de consumidores. A partir de uma análise de sensibilidade dos estudos de casos, verificou-se a influência dos parâmetros que compõem as equações do PRD proposto. Para avaliar o desempenho do modelo, foram feitos estudos numéricos usando uma versão modificada do sistema teste IEEE de 34 nós. A análise de sensibilidade entre os estudos de caso apresentou uma avaliação do percentual de adesão dos consumidores, bem como o comportamento das perdas ativas mensais e do perfil de tensão. Os resultados obtidos no presente estudo evidenciam a validade da abordagem proposta, a partir de uma formulação simplificada, além de demonstrar a potencial aplicabilidade a casos reais. / Power consumption behavior increase and easy access to electroelectronics technologies had contributed to annual power consumption rates surpass. As there is not yet an economically sustainable way to store electric power it is necessary to maintain the balance between offer and power demand (considering losses). Brazilian customers majority supplied in low voltage are charged by its mean power consumption masking peak consumption in certain periods of the day. Within this reality the present work analysis the impact of Demand Response Programs (DRP) using Time-Of-Use tariff (TOU) over the power distribution system’s performance. The proposed methodology applies the concept of Price Elasticity demand and uses the representation of different consumers’ types in a matrix approach. The DRP parameters’ variation impact was checked using a sensitivity analysis. In order to evaluate the performance of the proposed model numerical studies were done using the IEEE 34 modified node test feeder. A sensitivity analysis among the case studies presents the customers adherence percentage and the monthly active power losses and voltage profile. The methodology's results besides supporting the proposal approach from a simplified formulation show the potential use on real cases.

Orientador: Antonio Batocchio / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-16T07:48:35Z (GMT). No. of bitstreams: 1 Fragoso_BrunoBarreira_M.pdf: 3590640 bytes, checksum: 59c79674e5426e6915aac2c93e42eb4c (MD5) Previous issue date: 2010 / Resumo: Tendo em vista o cenário moderno globalizado, onde as organizações buscam um planejamento mais adequado de suas operações, torna-se importante realizar uma previsão da demanda dos produtos acabados, ou simplesmente demanda de vendas, que se aproxime dos números reais o máximo possível. Este trabalho tem como objetivo a proposição de um método para a criação de um processo de previsão de vendas, apoiado nas técnicas modernas de previsão de demanda, e nas ferramentas de gestão de processos. É feita uma discussão a respeito de como as técnicas de previsão de demanda podem ser analisadas, e até mesmo adaptadas, sob a ótica e conceitos de gestão de processos. Propõe-se então tal método, baseado em passos oriundos de boas práticas observadas, para o estabelecimento de um processo de previsão de vendas. Com a finalidade de verificar a potencialidade desta metodologia, apresenta-se um estudo de caso em uma empresa química da região de Campinas. Os passos para a criação deste processo foram cumpridos, desde a formação de um time de trabalho, passando pela análise do comportamento das demandas, escolha das técnicas de previsão e indicadores de desempenho, até a aplicação do piloto com proposição de melhorias e automatizações diversas. O método aplicado a este estudo de caso específico mostrou-se eficaz / Abstract: Based on the current modern and globalized scenario, within organizations look for a more adequate planning for its operations, it becomes important realizing a finished goods demand forecast, or simply sales forecast, which closes as possible to real sales numbers. This work objective is proposing a method for designing a sales forecast process, based on both modern demands forecast techniques and process management tools. A discussion was done regarding how demand forecast techniques can be analyzed, and even adapted under the process management concepts focus. This method, based on steps supported by good practices observed, is proposed for designing a sales forecast process. It is presented a case study at a Campinas region chemical industry with the objective of checking the potentially of this method. All steps for creating this process were completed, since the working team creation, passing through demand behavior analysis, forecast technique and performance indicator choosing, to the initial application with improvements and automations proposing. This method applied to this specific case study was considered efficient / Mestrado / Materiais e Processos de Fabricação / Mestre em Engenharia Mecânica

Made available in DSpace on 2014-10-09T12:26:54Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:00:52Z (GMT). No. of bitstreams: 0 / A cidade de Jundiaí está localizada a aproximadamente 60 Km de São Paulo e tem uma população de 342.983 mil habitantes sendo que 94,37% residem na zona urbana. A cidade está inserida na bacia hidrográfica do Rio Jundiaí, rio que é formado a partir da confluência do Rio Jundiaizinho com o Ribeirão das Taipas e possui uma extensão de 123 quilômetros e sua foz está situada em Salto, na confluência do Rio Jundiaí com o Rio Tietê. Está é menor bacia hidrográfica do estado de São Paulo e também uma das mais industrializadas. A cidade de Jundiaí conta com a Estação de Tratamento de Esgotos Novo Horizonte (ETE Jundiaí), que coleta 98% dos esgotos da cidade, trata 100% de todo esgoto coletado, com eficiência de remoção de 92% de carga orgânica, esgoto que depois do tratamento é lançado no Rio Jundiaí. O objetivo deste trabalho foi utilizar ensaios de toxicidade com organismos aquáticos para avaliar a carga tóxica que chega à ETE, bem como a eficiência do tratamento biológico e a influência da estação no seu entorno. Foram coletadas amostras em 6 pontos distintos; à montante da ETE (P1), na entrada da ETE (P2), na calha de distribuição das lagoas de aeração (P3), nas 2 saídas da ETE (P4 e P5) e à jusante da ETE (P6). As amostras de afluente da ETE foram mais tóxicas que os efluentes da ETE; já os resultados das amostras do rio não apresentaram diferença. Para Vibrio fischeri os valores de CE(i)50 variaram entre 2,23% e 9,39% para a calha de entrada das lagoas de aeração, enquanto que para Daphnia similis variaram entre 15,52% e 89,95%; para a entrada da ETE os valores variaram entre 4,63% e 8,31% para Vibrio fischeri , e 17,68% e não tóxico para Daphnia similis. Nas campanhas onde foram amostradas as saídas da ETE e águas do rio, os ensaios realizados com Vibrio fischeri apresentaram resultados entre 53,55% e não tóxico para águas do rio e 29,46% e não tóxico para o efluente da ETE, já para Daphnia similis, os resultados estão entre 55,92% e não tóxico para águas do rio e 70,97% e não tóxico para o efluente da ETE. Nos ensaios realizados com Ceriodaphnia dubia, a média de nascimentos para águas do rio esteve entre 4,60 e 15,00 enquanto que para o efluente da ETE esteve entre 4,50 e 10,35 para amostra bruta. Os resultados de toxicidade comprovam a eficiência da ETE na remoção de toxicidade porém outros parâmetros devem ser observados para se comprovar o impacto de seus efluentes sobre as águas do rio. / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP