1,720,966 research outputs found
Modelo para avaliar o comportamento dinâmico da agregação de serviços no contexto de PSS
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2013.Abstract : The Product-Service System (PSS) is characterized by adding value to the product by association services. In these dynamics systems acting feedback information structures, time lags and nonlinearities. So specific performance conditions this association cannot be addressed by the development process or the contemplation without the evaluating dynamic behavior can trigger unfavorable events in system behavior over time. Therefore, this research aimed to "establish guidelines for orientation of product development efforts by evaluation of the dynamic performance of the aggregation a service module to the product into PSS context." The survey data are secondary in nature and collected in specialized literature through a structured process. With this, the bibliographic reference portfolio has built seventeen articles. The intervention instrument "Dynamic Systems" was used for processing. Three main subsystems were comprised by study: production, service provision and consumption. In describing the system context were explained and associated the main factors and highlighted the feedback loops that give the nonlinearities of the system behavior. This feedback loops are: production control, service provision control, control of product quality, control of service quality, process losses and waiting losses. The system structure was defined in proposed model, as well as entered the variables and enabled the mathematically integrating of constants and variables. The impact of unfavorable conditions in model behavior was estimated with simulation process. Thus four basic guidelines for the development activity of the product were presented as a proposed for solving the research problem. These include: strengthening the integration of actions aimed at consumer satisfaction, strengthen the integration of actions directed to the ease of obtaining the value, strengthen the integration of actions aimed at ease of consumption value, and strengthen the integration of actions aimed at controlling and operation of production and value addition
Modelo de dinâmica de sistemas para avaliar capacidade na manufatura orientada a serviços
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2018.Com a redução da demanda na indústria da manufatura o gap resultante entre a capacidade utilizada e a capacidade instalada representa uma condição indesejável para o fabricante visto que corresponde a uma menor receita frente aos custos fixos. Essa pesquisa aborda esse problema utilizando como alternativa a oferta de serviços no contexto da Manufatura Orientada a Serviços (MOS) (Service Oriented-Manufacturing) em que estão envolvidas diferentes expectativas do consumidor. Então, o objetivo da pesquisa consistiu em qualificar o comportamento da utilização da capacidade sob a influência da expectativa do consumidor em um contexto de manufatura orientada a serviços. É usada a Dinâmica de Sistemas no processo interpretação e modelagem. Na construção do modelo, em um ponto de vista operacional, foram considerados três subsistemas: mercado, consumo e subsistema MOS. Os fatores específicos referentes ao consumidor no subsistema de consumo se referem a percepção do valor quanto ao preço, tempo de prestação, qualidade e confiabilidade. Nesse sentido, os cenários prospectados indicam que para a condição do problema a atuação no contexto da MOS é capaz de utilizar 100% da capacidade disponível do sistema ao longo de um horizonte de tempo. Porém, a expectativa do consumidor quanto ao tempo de prestação demonstrou um impacto maior no horizonte de tempo de utilização desse nível da capacidade, sendo esse horizonte reduzido em 8,47% em relação ao cenário de referência. A influência da expectativa quanto à qualidade, ao contrário, aumentou esse horizonte de utilização da capacidade em 8,23%, enquanto que a influência quanto confiabilidade o fez em 8,55%. Já a atuação em um mercado com influência da expectativa em relação ao preço ampliou esse horizonte em 19,5%. Por isso, se conclui que o gap de capacidade é anulado pela adoção da MOS, mas a sustentação desse resultado ao longo do tempo está sujeito a orientação do mercado, caracterizado pela expectativa do consumidor. Outra conclusão indica que a adoção da manufatura orientada a serviços é favorável, porém a extensão da oferta de serviços precisa considerar a persistência do problema ao longo do horizonte de tempo. O modelo construído pode ser utilizado por fabricantes da indústria da manufatura tanto para (i) a tomada de decisão para a adoção de serviços, quanto para (ii) a orientação de ações de controle do sistema.Abstract : With reduced demand in a manufacturing industry, the resulting gap between the utilized and the installed capacity is an undesirable condition for the manufacturer because it corresponds to lower revenue in relation to fixed costs. This study addresses this problem by using service-oriented manufacturing (SOM), which involves different consumer expectations, as an alternative service-offering context. The aim of this study was to qualify the capacity utilization behavior under the influence of consumer expectations in a SOM context. To do this, system dynamics was used in the context interpretation and modeling process. From an operational point of view, three subsystems were considered when developing the model: market, consumption and the SOM subsystem. Consumer-related factors in the consumption subsystem include the perception of value for the price, financing options (payment installments), quality and reliability. Prospective scenarios indicated that the performance problem condition in the SOM context could use 100% of the available capacity of the system over a time horizon. However, consumer-financing expectations had a great impact on the time horizon of this capacity level, reducing its horizon by 8.47% compared to the reference scenario. The influence of service quality expectations, on the other hand, increased the horizon by 8.23%, while the influence of reliability was 8.55%. On the other hand, market performance, influenced by price expectations, increased the horizon by 19.5%. It is thus concluded that the capacity gap is canceled by employing SOM, but the sustainability of this result over time is subject to market orientation, which is characterized by consumer expectations. Another conclusion is that although SOM is favorable, the extent of the service offer must consider the persistence of the problem over the time horizon. The model constructed in this study can be used in the manufacturing industry (i) for decision making with respect to services and (ii) to guide system control actions
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
GUIDELINES RELATED TO PERFORMANCE RESTRICTIONS IN THE PRODUCT-SERVICE SYSTEM: A SYSTEM DYNAMICS APPROACH
No full textThe dynamic behavior of a Product-Service System is influenced by the delays regarding customer decisions and nonlinearities of perceptions. These factors can generate performance restrictions when services are added to products without managerial review, since System Dynamics models that address the Product-Service System do not provide a detailed description of the operational dynamics of services or the relationship of the system with customer perception. Thus, in this article a model is proposed to represent graphically the dynamic behavior of the service aggregation to deliver value. Using the System Dynamics methodology, the results included a conceptual model showing the main dynamic factors, a structural model and its mathematical description. This enables the contribution: the establishment of guidelines for management and product development process. Four guidelines are detailed highlighting the importance of considering the satisfied condition, the ease of the obtainment and consumption of value and the operational and control issues
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
