966 resultados para measurement systems
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In this work, the influence of both characteristics of the lens and misalignment of the incident beams on roughness measurement is presented. To investigate how the focal length and diameter affect the degree of correlation between the speckle patterns, a set of experiments with different lenses is performed. On the other hand, the roughness when the beams separated by an amount are non-coincident at the same point on the sample is measured. To conclude the study, the uncertainty of the method is calculated.
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As machine tools continue to become increasingly repeatable and accurate, high-precision manufacturers may be tempted to consider how they might utilise machine tools as measurement systems. In this paper, we have explored this paradigm by attempting to repurpose state-of-the-art coordinate measuring machine Uncertainty Evaluating Software (UES) for a machine tool application. We performed live measurements on all the systems in question. Our findings have highlighted some gaps with UES when applied to machine tools, and we have attempted to identify the sources of variation which have led to discrepancies. Implications of this research include requirements to evolve the algorithms within the UES if it is to be adapted for on-machine measurement, improve the robustness of the input parameters, and most importantly, clarify expectations.
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Incorporating Material Balance Principle (MBP) in industrial and agricultural performance measurement systems with pollutant factors has been on the rise in recent years. Many conventional methods of performance measurement have proven incompatible with the material flow conditions. This study will address the issue of eco-efficiency measurement adjusted for pollution, taking into account materials flow conditions and the MBP requirements, in order to provide ‘real’ measures of performance that can serve as guides when making policies. We develop a new approach by integrating slacks-based measure to enhance the Malmquist Luenberger Index by a material balance condition that reflects the conservation of matter. This model is compared with a similar model, which incorporates MBP using the trade-off approach to measure productivity and eco-efficiency trends of power plants. Results reveal similar findings for both models substantiating robustness and applicability of the proposed model in this paper.
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Integration of the measurement activity into the production process is an essential rule in digital enterprise technology, especially for large volume product manufacturing, such as aerospace, shipbuilding, power generation and automotive industries. Measurement resource planning is a structured method of selecting and deploying necessary measurement resources to implement quality aims of product development. In this research, a new mapping approach for measurement resource planning is proposed. Firstly, quality aims are identified in the form of a number of specifications and engineering requirements of one quality characteristics (QCs) at a specific stage of product life cycle, and also measurement systems are classified according to the attribute of QCs. Secondly, a matrix mapping approach for measurement resource planning is outlined together with an optimization algorithm for combination between quality aims and measurement systems. Finally, the proposed methodology has been studied in shipbuilding to solve the problem of measurement resource planning, by which the measurement resources are deployed to satisfy all the quality aims. © Springer-Verlag Berlin Heidelberg 2010.
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Part 16: Performance Measurement Systems
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Part 16: Performance Measurement Systems
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Nowadays, Power grids are critical infrastructures on which everything else relies, and their correct behavior is of the highest priority. New smart devices are being deployed to be able to manage and control power grids more efficiently and avoid instability. However, the deployment of such smart devices like Phasor Measurement Units (PMU) and Phasor Data Concentrators (PDC), open new opportunities for cyber attackers to exploit network vulnerabilities. If a PDC is compromised, all data coming from PMUs to that PDC is lost, reducing network observability. Our approach to solve this problem is to develop an Intrusion detection System (IDS) in a Software-defined network (SDN). allowing the IDS system to detect compromised devices and use that information as an input for a self-healing SDN controller, which redirects the data of the PMUs to a new, uncompromised PDC, maintaining the maximum possible network observability at every moment. During this research, we have successfully implemented Self-healing in an example network with an SDN controller based on Ryu controller. We have also assessed intrinsic vulnerabilities of Wide Area Management Systems (WAMS) and SCADA networks, and developed some rules for the Intrusion Detection system which specifically protect vulnerabilities of these networks. The integration of the IDS and the SDN controller was also successful. \\To achieve this goal, the first steps will be to implement an existing Self-healing SDN controller and assess intrinsic vulnerabilities of Wide Area Measurement Systems (WAMS) and SCADA networks. After that, we will integrate the Ryu controller with Snort, and create the Snort rules that are specific for SCADA or WAMS systems and protocols.
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Perante os contínuos desafios com que se defrontam as organizações, consequência dos elevados níveis de competitividade, é-lhes exigido uma nova dinâmica de gestão, onde os recursos humanos se assumem como o seu principal elemento diferenciador. Neste contexto, é fundamental a existência de uma gestão estratégica dos recursos humanos, a institucionalização de um conjunto de práticas que permitam transformar os recursos humanos num activo estratégico, que conduza à execução da estratégia organizacional. Essas práticas passam pela atracção e retenção de talentos, oportunidades de desenvolvimento, propiciar boas condições de trabalho quer a nível quantitativo quer a nível qualitativo. E como cada pessoa é um ser único, dotado de características próprias, impossíveis de imitar, deve ser reconhecida a capacidade de serem uma fonte de vantagem competitiva. Não é suficiente o estabelecimento de um conjunto de boas práticas para que se possuam recursos humanos estratégicos. É fundamental fazer o acompanhamento dessas práticas através da monitorização. Na gestão o que não pode ser medido não pode ser gerido. É fundamental sensibilizar os gestores, profissionais de recursos humanos, para a criação de sistemas de medida e métricas que possam aferir a contribuição do Capital Humano para a missão e estratégia das organizações. O Balanced Scorecard é uma ferramenta de gestão que possibilita, através da informação dos seus indicadores, a implementação das estratégias nas organizações. A finalidade é garantir que os indicadores definidos estejam coerentes com a estratégia global. Essa metodologia tem assim o mérito de compatibilizar (através de indicadores quantitativos) a gestão de recursos humanos com os objectivos a longo prazo da organização. A existência de indicadores qualitativos permite ainda às organizações mensurar o nível de desempenho e motivação, factores influentes no clima organizacional
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Trabalho Final de Mestrado elaborado no Laboratório Nacional de Engenharia Civil (LNEC) para a obtenção do grau de Mestre em Engenharia Civil pelo Instituto Superior de Engenharia de Lisboa no âmbito do protocolo de cooperação entre o ISEL e o LNEC
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Unilever Jerónimo Martins is a Portuguese joint-venture leading firm in what concerns the supply chain industry of fast-moving consumer goods in Portugal. The scope of analysis of this Work Project is focusing on Unilever-JM operations and services in the Portuguese market regarding quality, efficiency and effectiveness over B2B customers. It will be analysed the possibility of development and implementation of a performance measurement system, Tableau de Bord, which will be crucial for the identification of potential opportunities of improvement with impact in the supply chain processes. This will be completed through the establishment of KPI’s to monitor and manage periodically logistics, planning and customer service processes’ performance, which are the ones where the bottlenecks are impacting more in the supply chain. In this work project the nexus causality for the problems will also be discussed and some recommendations will be prepared to tackle the inefficiencies found through the monitoring of the previous core processes, in order to improve efficacy and quality service of the supply chain.
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O presente artigo resulta de um projeto de investigação que aborda a melhoria de um programa de controlo estatístico de um processo de injeção de plásticos, tendo por base a aplicação das ferramentas básicas da qualidade, nomeadamente a análise de Pareto, o diagrama de Ishikawa e os gráficos de controlo. Paralelamente às ferramentas básicas da qualidade, foi também utilizada a metodologia Análise ao Sistema de Medida (Measurement Systems Analysis), com recurso ao software Minitab. A metodologia empregue neste projeto foi o estudo de caso.
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In this bachelor's thesis a relay card for capacitance measurements was designed, built and tested. The study was made for the research and development laboratory of VTI Technologies, which manufactures capacitive silicon micro electro mechanical accelerometers and pressure sensors. As the size of the sensors is decreasing the capacitance value of the sensors also decreases. The decreased capacitance causes a need for new and more accurate measurement systems. The technology used in the instrument measuring the capacitance dictates a framework how the relay card should be designed, thus the operating principle of the instrument must be known. To achieve accurate results the measurement instrument and its functions needed to be used correctly. The relay card was designed using printed circuit board design methods that minimize interference coupling to the measurement. The relay card that was designed in this study is modular. It consists of a separate CPU card, which was used to control the add-on cards connected to it. The CPU card was controlled from a computer through a serial bus. Two add-on cards for the CPU card were designed in this study. The first one was the measurement card, which could be used to measure 32 capacitive sensors. The second add-on card was the MUX card, which could be used to switch between two measurement cards. The capacitance measurements carried out through the MUX card and the measurement cards were characterized with a series of test measurements. The test measurement data was then analysed. The relay card design was confirmed to work and offer accurate measurement results up to a measurement frequency of 10 MHz. The length of the measurement cables limited the measurement frequency.
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Presentemente, o controlo de gestão está vocacionado para agir antes de os factos indesejáveis ocorrerem, assegurando que os objectivos estabelecidos pela gestão são atingidos dentro do timing fixado. Além disso, o controlo de gestão deve ser o motor que permita alcançar as melhores performances nas áreas críticas da empresa, não só no domínio económico e financeiro, mas também nas áreas do crescimento, segurança e produtividade. Um dos mais importantes objectos das administrações actuais, é determinar se o desempenho da organização está de acordo com o que foi estabelecido previamente, ou seja, seus objectivos e metas. O meio através do qual se verificaria este desempenho seria a utilização de métodos e sistemas de avaliação de desempenho eficazes. Neste contexto, o presente estudo consiste em fazer um estudo exploratório descritivo identificando e averiguando de que forma as instituições bancárias de Cabo Verde efectuam a gestão de alguns aspectos, especialmente a avaliação de desempenho e o controlo estratégico, e que indicadores utilizam. Não obstante os objectivos específicos do trabalho serem outros, também damos especial atenção às características do mercado cabo-verdiano e à importância do sector bancário para a economia. Finalmente, apresentamos o Balanced Scorecard como uma ferramenta capaz de suprir as dificuldades da avaliação de desempenho e o conjunto de indicadores que vemos como o mais adequado. Neste ponto, concentramos nas quatro perspectivas básicas e no mapa estratégico, referindo o papel do Balanced Scorecard no alinhamento estratégico e na avaliação do desempenho organizacional. Para concluir, reforçamos o estudo, entrevistando um especialista (Director Financeiro) de um dos bancos da praça, cujo nome prometemos não publicar. Dessa forma, esperamos contribuir para uma melhor percepção da realidade em estudo, tanto do ponto de vista teórico, quanto da verificação das práticas no sector. Presently, the management control is oriented to act before the undesirable facts happen, assuring that the management established objectives are being achieved in the fixed timing. Besides, the management control must be an engine that permits to achieve the best performances at critical company areas, not only in the economic and financial areas, but at the growth, security and productivity areas too. One of the most important administration objects nowadays is to know if the organization performance is according to the fixed targets. The performance measurement could be done through effective methods and performance measurement systems. That’s why this assignment consists in doing an exploratory and descriptive study, identifying and investigating how the bank institutions of Cape Verde manage some things, particularly the performance measurement and the strategic control, and to know which indicators they use. Although the specific objectives of this assignment are others, we also give special attention to the Capeverdean market characteristics, and to the relevance of the banking industry to the economy of the country. Finally, we present the Balanced Scorecard as a competent tool to supply the measurement performance difficulties and a number of indicators that we find appropriate. In this point, we focus in the four basic perspectives and the strategic map, referring to the role of the Balanced Scorecard in the strategic alignment and organization performance measurement. We conclude this study with an interview to an expert (A Financial Manager) of a bank working in Cape Verde, whose name we promise to preserve. In this way, we hope to contribute to a better perception of this reality, in the theoretical point-of-view as much as in the practical check of this industry’s labour.
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Tämän tutkimuksen tavoitteena oli kehittää kohdeorganisaationa olevalle taloushallinnon palvelukeskukselle suorituskykymittaristo suorituskyvyn seurantaa ja toiminnan ohjaamista varten. Lähtökohtana oli, että mittaristo tulee johtaa strategisten tavoitteiden ja kriittisten menestystekijöiden kautta palvelukeskuksen visiosta, missiosta ja arvoista ja sen tulee kattaa koko palvelukeskuksen toiminta. Vastauksia etsittiin kysymyksiin: Mitkä ovat kohdeorganisaation visio, missio, arvot, strategiset tavoitteet ja kriittiset menestystekijät? Mitkä ovat kohdeorganisaation seurattavat ja toimintaa ohjaavat mittarit eri tasoilla (palvelukeskus- ja tiimitaso)? Mistä, millaisia raportteja käyttäen, kenen toimestaja kuinka usein kerätään seurantadataa valittujen mittareiden osalta? Tutkimus on pääosin luonteeltaan laadullinen toimintatutkimus, mutta sisältää myös konstruktiivisen tutkimusotteen piirteitä. Työn alkuosa, missä käsitellään strategiaan, asiantuntijatyöhön, palvelukeskusmalliin ja mittaristoihin liittyvää teoriaa, on luonteeltaan käsiteanalyyttinen. Tutkimuksen tuloksena täsmennettiin palvelukeskuksen visio, missio, arvot, strategiset tavoitteet, kriittiset menestystekijät sekä mittaristo ohjaustietoineen.
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Uudistunut ympäristölainsäädäntö vaatii energiantuotantolaitoksilta yhä enemmän järjestelmällistä ympäristötiedon hallintaa. LCP- ja jätteenpolttoasetuksen velvoitteet ovat asettaneet uusia vaatimuksia päästöjen valvontaan ja siihen käytettävien mittausjärjestelmien laadunvarmennukseen sekä päästötietojen raportointiin. Uudistukset ovat lisänneet huomattavasti laitoksilla ympäristötiedon käsittelyyn kuluvaa aikaa. Laitosten toimintaehdot määritellään ympäristöviranomaisen myöntämässä ympäristöluvassa, joka on tärkein yksittäinen laitoksen toimintaa ohjaava tekijä. Tämän lisäksi monet toimijat haluavat parantaa ympäristöasioiden tasoaan vapaaehtoisilla ympäristöjärjestelmillä. Tässä diplomityössä kuvataan energiantuotantolaitosten ympäristöasioiden tallentamiseen ja hallintaan kehitetty selainpohjainen Metso Automationin DNAecoDiary'sovellus. Työ on rajattu koskemaan Suomessa toimivia LCP- ja/tai jätteenpolttoasetuksen alaisia laitoksia. Sovelluksen avulla voidaan varmistaa energiantuotantolaitosten poikkeamien, häiriöilmoitusten, päästömittalaitteisiin liittyvien tapahtumien ja muun ympäristöasioiden valvontaan liittyvän informaation tehokas hallinta. Sovellukseen tallennetaan ympäristötapahtumiin liittyvät perustiedot sekä etenkin käyttäjien tapahtumiin liittyvä kokemustietämys. Valvontakirjaukseen voidaan liittää tapahtuman perustietojen lisäksi myös tiedostoja ja kuvia. Sovellusta ja sillä kerättyä tietoa voidaan hyödyntää laitoksella käsilläolevien ongelmien ratkaisuun, ympäristötapahtumien todentamiseen sekä ympäristöraporttien laadintaan. Kehitystyön tueksi järjestettiin asiakastarvekartoitus, jonka perusteella ideoitiin sovelluksen ominaisuuksia. Tässä työssä on esitetty ympäristötiedon hallinan perusteet, selvitetty DNAecoDiaryn toimintaperiaatteet ja annettu esimerkkejä sen hyödyntämisestä. Sovelluksen lopullinen sisältö määritellään kunkin asiakkaan ympäristöluvan ja oma-valvonnan tarpeiden mukaisesti. Sovellus toimii itsenäisesti tai osana laajempaa Metso Automationin päästöjenhallinta- ja raportointisovelluskokonaisuutta.