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Desenvolvimento e fabricação de protótipo de impressão roll-to-roll para estudos de produção em série de dispositivos orgânicos; Development and fabrication of roll-to-roll prototype for series production study of organic devices

Cagnani, Leonardo Dias
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 21/02/2013 PT
Relevância na Pesquisa
36.4%
Para que a tecnologia de eletrônica orgânica alcance todo o seu potencial é primordial que o processo de fabricação seja rápido e barato, e uma das maneiras de alcançar isto é com a utilização de processos gráficos especialmente adaptados para a produção de eletrônica, processo esse conhecido por roll-to-roll. Uma grande carência mundial se encontra em equipamentos de produção roll-to-roll de porte laboratorial, que possam ser utilizados para estudos de construção dos dispositivos e, mais importante, a transferência das tecnologias desenvolvidas em laboratório para processos que possam ser facilmente expandidos para a indústria. Neste sentido, durante este trabalho foi desenvolvido um sistema roll-to-roll compacto para produção e estudo de dispositivos orgânicos que apresenta as técnicas de deposição por rotogravura, wire-bar e knife-over-edge comutáveis, sendo empregada uma técnica por vez. O equipamento foi projetado e fabricado de forma a permitir a maior quantidade possível de ajustes das variáveis, com um pequeno consumo de material polimérico e de substrato. Além disto, desenvolveu-se um software de controle operado empregando-se o programa LabVIEW para regulagem da temperatura de secagem, velocidades do substrato e impressão. Como primeiro dispositivo fabricado optou-se por células eletroquímicas emissoras de luz (PLEC) por estas apresentarem baixa tensão de operação e uma baixa influência da espessura e dos eletrodos em suas propriedades optoeletrônicas. Desta forma...

Uma análise nos principais aspectos da construção calçadista para o desenvolvimento de um solado-protótipo feito a partir de fibra de coco; An analysis in the main aspects of the footwear construction for development of a prototype soloed made from coconut fibers.

Costa, Célia Regina da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 02/04/2013 PT
Relevância na Pesquisa
36.58%
Os calçados são essenciais na vida humana, eles possuem a função primordial de proteger os pés e interagem constantemente com o indivíduo. Além do aspecto funcional, se exige qualidade, conforto e estética em sua confecção. Os fatores antropométricos e biomecânicos contribuem nessa interface ao oferecer parâmetros científicos na sua forma ergonômica. Confeccionar um calçado que garanta a saúde para os pés necessita conhecer os fatores que estão direta ou indiretamente relacionados à sua história, ao processo de produção, a matéria-prima entre outros itens relacionados ao calçado, assim com um embasamento científico pode dar um melhor suporte ao processo de desenvolvimento do produto. Neste contexto, a dissertação teve por objetivo organizar estes conceitos de maneira que forneça informações essenciais para a construção de um calçado confortável, pois há uma dificuldade em encontrar uma gama de conhecimentos reunidos sobre calçados para o desenvolvimento de novos projetos. Neste sentido, o estudo investigou também as características da fibra de coco verde, dos frutos descartados na cidade de Francisco Morato - São Paulo, para verificar a viabilidade de aplicação dessas fibras na construção de partes do calçado. Para a realização deste trabalho foi fundamentado uma revisão teórica que apontou a evolução do calçado na história da humanidade...

Design do vestuário : protótipo funcional para o encaixe de moldes no tecido; Garment design: functional prototype for pattern fitting along the fabric

Alves, Andressa Schneider
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
36.63%
Esta dissertação tem por objetivo tratar do problema de encaixe de moldes da indústria do vestuário. O problema consiste no encaixe bidimensional de itens pequenos (moldes), que possuem formas irregulares, dentro de um material que será cortado, que possui forma retangular com largura fixa e comprimento variável. O principal objetivo do encaixe é minimizar o desperdício do material que será cortado, neste caso, o tecido. Para tratar o problema do encaixe bidimensional de moldes propõe-se, a partir do desenvolvimento de uma técnica de encaixe, um protótipo funcional.A concepção da técnica foi realizada com as informações obtidas nas etapas de coleta de dados: dados indiretos (Fundamentação Teórica) e dados diretos (Observações Diretas e Entrevistas com especialistas no encaixe manual). Os dados obtidos nessas etapas e, principalmente, a triangulação dos mesmos, permitiram o desenvolvimento da técnica de encaixe de moldes, que consiste em três partes: representação gráfica do tecido e dos moldes, critérios de ordenamento e construção do layout. A técnica proposta está implementada no protótipo funcional Riscare através da linguagem Delphi. Para construir a interface do Riscare, realiza-se uma avaliação da usabilidade de um software comercial com a mesma função. Os conceitos avaliados auxiliaram no desenvolvimento da interface do Riscare. A criação do protótipo funcional possibilitou a comparação da técnica proposta para o encaixe de moldes com encaixes realizados manualmente...

GDP 4.0 transfer to SGP 3.0 for SCIAMACHY no2 column processing: Verification with SDOAS / GDOAS prototype algorithms and delta-validation with NDACC / UV-visible network data

Lambert, J. C.; Granville, J.; Lerot, C.; Hendrick, F.; Van Roozendael, M.; Andersen, S. B.; Dorokhov, V.; Gerard, P.; Gil, M.; Goutail, F.; Gruzdev, A. N.; Held, G.; Ionov, D. V.; Johnston, P. V.; Kostadinov, I.; Kreher, K.; Kyrö, E.; Leveau, J.; Navarr
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
36.51%
Until mid 2006, SCIAMACHY data processors for the operational retrieval of nitrogen dioxide (NO2) column data were based on the historical version 2 of the GOME Data Processor (GDP). On top of known problems inherent to GDP 2, ground-based validations of SCIAMACHY NO2 data revealed issues specific to SCIAMACHY, like a large cloud-dependent offset occurring at Northern latitudes. In 2006, the GDOAS prototype algorithm of the improved GDP version 4 was transferred to the off-line SCIAMACHY Ground Processor (SGP) version 3.0. In parallel, the calibration of SCIAMACHY radiometric data was upgraded. Before operational switch-on of SGP 3.0 and public release of upgraded SCIAMACHY NO2 data, we have investigated the accuracy of the algorithm transfer: (a) by checking the consistency of SGP 3.0 with prototype algorithms; and (b) by comparing SGP 3.0 NO2 data with ground-based observations reported by the WMO/GAW NDACC network of UV-visible DOAS/SAOZ spectrometers. This delta-validation study concludes that SGP 3.0 is a significant improvement with respect to the previous processor IPF 5.04. For three particular SCIAMACHY states, the study reveals unexplained features in the slant columns and air mass factors, although the quantitative impact on SGP 3.0 vertical columns is not significant.

Development of a Digital Repository Prototype applied to Faculty of Pharmacy, University of Lisbon

Lopes, Sílvia; Lopes, Pedro Faria; Campos, Fernanda
Fonte: Universidade de Lisboa Publicador: Universidade de Lisboa
Tipo: Artigo de Revista Científica
Publicado em //2010 ENG
Relevância na Pesquisa
36.4%
University libraries have played a key role in scientific research as well as in the support of education-related activities. Their main goal is to provide their users with immediate access to relevant information through updated information sources. Science evolves rapidly and so the daily information needs on health matters are large and require rapid access to the sources. One of the problems that currently exist in university libraries is the access and processing of information in digital format. Digital objects are technologically diverse and there is not enough technical information regarding its proper handling. In this paper we present the tools and methodologies that should be used to provide, in an organized and validated way, the wide range of existing information in a digital format. This work was done in the context of a Master of Science thesis in Information Studies and Digital Libraries. The aim was to find practical solutions for the processing and offering of information in digital format in the context of pharmaceutical sciences. Finally, the paper presents reliable benchmarking of best practices to implement and evaluate a prototype applied to the Pharmaceutical Sciences, in order to satisfy the user’s needs.

Uncovering the business opportunity prototype: Cognitive and learning aspects of entrepreneurial opportunity recognition in higher education

Costa, Sílvia Margarida dos Santos Fernandes
Fonte: Instituto Universitário de Lisboa Publicador: Instituto Universitário de Lisboa
Tipo: Tese de Doutorado
Publicado em //2015 ENG
Relevância na Pesquisa
36.58%
Degree of Doctor in Human Resources Management and Development / JEL Classification System: L260 Entrepreneurship; M130 New Firms; Startups; The research project underlying this thesis focuses on three main aspects of entrepreneurship. First, we focus on opportunity recognition as the point of departure for entrepreneurial thinking and entrepreneurial activity. Secondly, we propose that basic perceptive cognitive structures (such as prototypes) are fundamental to recognize opportunities at early stages of development of the entrepreneurial mindset. Third, we focus on cognitive and learning aspects of opportunity recognition with individuals in higher education. To explore these topics, the present thesis is divided in two parts. Part I focuses on the theoretical and empirical development of the topic on business opportunity prototype for opportunity recognition and includes three studies. Study 1 provides a systematic literature review of prototypes in entrepreneurship research. A theoretical model based on this analysis is presented and empirically tested on the remaining studies of the thesis. Study 2 explores the role of the context of business opportunity recognition on the identification of its prototypical features. Study 3 proposes a simplified business opportunity prototype to describe how individuals with no entrepreneurial experience perceive business opportunities from early stages of the entrepreneurial mindset. Part II focuses on the training and learning aspects of cognitive structures regarding opportunity recognition and includes one empirical study. Study 4 focuses on the effect of cognitive training and experiential learning on the development and accuracy of the business opportunity prototype. Moreover...

Preliminary study of the acoustic behavior concerning an innovative prototype for indoor modular partitioning

Simões, Gonçalo; Patrício, Jorge; Faria, Paulina
Fonte: Universidade Nova de Lisboa Publicador: Universidade Nova de Lisboa
Tipo: Artigo de Revista Científica
Publicado em /11/2014 ENG
Relevância na Pesquisa
36.58%
This paper presents a preliminary acoustic study concerning the development of the first prototype of a patented removable module for interior partitioning. It is a prefabricated, vertical element for division of interior spaces that does not require the use of gutters or technical support. A set of such modules, linearly disposed, will create a division, allowing the personalization of any indoor area, including open office spaces, rooms, among others. The main characteristic that distinguishes this element from the existing solutions available on the market is that its mobility relies exclusively on a set of integrated bearings at the base of each module. Through an incorporated elevation system, the user can lower the module, move it to the desired position and re-elevate it until pressed against the ledge of the ceiling, making it stable. In this sense, and taking into account its acoustic behavior, several tests were made in the LNEC acoustics lab. Airborne sound insulation tests for different typologies of the prototype were conducted, according to the applicable standards EN ISO 354:2003, EN ISO 717-1:2013 and EN ISO 10140-2:2010. Some important conclusions and analysis of the prototype viability were extracted.

Electroretinography in dogs using a fiber electrode prototype

Pereira,A.L.; Montiani-Ferreira,F.; Santos,V.R.; Salomao,S.R.; Souza,C.; Berezovsky,A.
Fonte: Associação Brasileira de Divulgação Científica Publicador: Associação Brasileira de Divulgação Científica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2013 EN
Relevância na Pesquisa
36.63%
We compared two electroretinography (ERG) electrodes in dogs using ERG standards of the International Society for Clinical Electrophysiology of Vision (ISCEV). Ten healthy Yorkshire terrier dogs (mean age, 2.80 ± 1.42 years; 6 females) weighing 5.20 ± 1.56 kg were evaluated using an ERG system for veterinary use. Dark- and light-adapted ERG responses were recorded using an ERG-Jet electrode and a fiber electrode prototype. The examinations were performed during 2 visits, 3 weeks apart. Both electrodes (ERG-Jet or fiber prototype) were used on each animal and the first eye to be recorded (OD × OS) was selected randomly. Three weeks later the examination was repeated on the same animal switching the type of electrode to be used that day and the first eye to be examined. The magnitude and waveform quality obtained with the two electrode types were similar for all ERG responses. ERG amplitudes and implicit times obtained from dogs using the fiber electrode prototype were comparable to those obtained with the ERG-Jet electrode for rod, maximal rod-cone summed, cone, and 30-Hz flicker responses. The fiber electrode prototype is a low-cost device...

Prototype diagnosis of psychiatric syndromes

WESTEN, DREW
Fonte: Elsevier Italy Publicador: Elsevier Italy
Tipo: Artigo de Revista Científica
Publicado em /02/2012 EN
Relevância na Pesquisa
36.51%
The method of diagnosing patients used since the early 1980s in psychiatry, which involves evaluating each of several hundred symptoms for their presence or absence and then applying idiosyncratic rules for combining them for each of several hundred disorders, has led to great advances in research over the last 30 years. However, its problems have become increasingly apparent, particularly for clinical practice. An alternative approach, designed to maximize clinical utility, is prototype matching. Instead of counting symptoms of a disorder and determining whether they cross an arbitrary cutoff, the task of the diagnostician is to gauge the extent to which a patient’s clinical presentation matches a paragraph-length description of the disorder using a simple 5-point scale, from 1 (“little or no match”) to 5 (“very good match”). The result is both a dimensional diagnosis that captures the extent to which the patient “has” the disorder and a categorical diagnosis, with ratings of 4 and 5 corresponding to presence of the disorder and a rating of 3 indicating “subthreshold” or “clinically significant features”. The disorders and criteria woven into the prototypes can be identified empirically, so that the prototypes are both scientifically grounded and clinically useful. Prototype diagnosis has a number of advantages: it better captures the way humans naturally classify novel and complex stimuli; is clinically helpful...

Development of prototype abstraction and exemplar memorization

Baetu, I.I.; Shultz, T.
Fonte: Cognitive Science Society; www Publicador: Cognitive Science Society; www
Tipo: Conference paper
Publicado em //2010 EN
Relevância na Pesquisa
36.58%
We present a connectionist model of concept learning that integrates prototype and exemplar effects and reconciles apparently conflicting findings on the development of these effects. Using sibling-descendant cascade-correlation networks, we found that prototype effects were more prominent at the beginning of training and decreased with further training. In contrast, exemplar effects steadily increased with learning. Both kinds of effects were also influenced by category structure. Well-differentiated categories encouraged prototype abstraction while poorly structured categories promoted example memorization.; Irina Baetu and Thomas R. Shultz

Local feature weighting in nearest prototype classification

Fernández, Fernando; Isasi, Pedro
Fonte: IEEE Publicador: IEEE
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em /01/2008 ENG
Relevância na Pesquisa
36.67%
The distance metric is the corner stone of nearest neighbor (NN)-based methods, and therefore, of nearest prototype (NP) algorithms. That is because they classify depending on the similarity of the data. When the data is characterized by a set of features which may contribute to the classification task in different levels, feature weighting or selection is required, sometimes in a local sense. However, local weighting is typically restricted to NN approaches. In this paper, we introduce local feature weighting (LFW) in NP classification. LFW provides each prototype its own weight vector, opposite to typical global weighting methods found in the NP literature, where all the prototypes share the same one. Providing each prototype its own weight vector has a novel effect in the borders of the Voronoi regions generated: They become nonlinear. We have integrated LFW with a previously developed evolutionary nearest prototype classifier (ENPC). The experiments performed both in artificial and real data sets demonstrate that the resulting algorithm that we call LFW in nearest prototype classification (LFW-NPC) avoids overfitting on training data in domains where the features may have different contribution to the classification task in different areas of the feature space. This generalization capability is also reflected in automatically obtaining an accurate and reduced set of prototypes.

Evolutionary design of nearest prototype classifiers

Fernández, Fernando; Isasi, Pedro
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em /07/2004 ENG
Relevância na Pesquisa
36.51%
In pattern classification problems, many works have been carried out with the aim of designing good classifiers from different perspectives. These works achieve very good results in many domains. However, in general they are very dependent on some crucial parameters involved in the design. These parameters have to be found by a trial and error process or by some automatic methods, like heuristic search and genetic algorithms, that strongly decrease the performance of the method. For instance, in nearest prototype approaches, main parameters are the number of prototypes to use, the initial set, and a smoothing parameter. In this work, an evolutionary approach based on Nearest Prototype Classifier (ENPC) is introduced where no parameters are involved, thus overcoming all the problems that classical methods have in tuning and searching for the appropiate values. The algorithm is based on the evolution of a set of prototypes that can execute several operators in order to increase their quality in a local sense, and with a high classification accuracy emerging for the whole classifier. This new approach has been tested using four different classical domains, including such artificial distributions as spiral and uniform distibuted data sets...

Nearest prototype classification of noisy data

Fernández, Fernando; Isasi, Pedro
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em /12/2008 ENG
Relevância na Pesquisa
36.51%
Nearest prototype approaches offer a common way to design classifiers. However, when data is noisy, the success of this sort of classifiers depends on some parameters that the designer needs to tune, as the number of prototypes. In this work, we have made a study of the ENPC technique, based on the nearest prototype approach, in noisy datasets. Previous experimentation of this algorithm had shown that it does not require any parameter tuning to obtain good solutions in problems where class limits are well defined, and data is not noisy. In this work, we show that the algorithm is able to obtain solutions with high classification success even when data is noisy. A comparison with optimal (hand made) solutions and other different classification algorithms demonstrates the good performance of the ENPC algorithm in accuracy and number of prototypes as the noise level increases. We have performed experiments in four different datasets, each of them with different characteristics.

Novel single-double-effect LiBr-H₂O absorption prototype with a highly efficient direct air-cooled adiabatic absorber: characterization, simulation and experimental results; Nuevo prototipo de máquina frigorífica de absorción de LiBr-H₂O de simple y doble efecto con absorbedor adiabático refrigerado por aire de alta eficiencia : descripción, simulación y resultados experimentales

González Gil, Arturo
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Tese de Doutorado Formato: application/pdf
ENG
Relevância na Pesquisa
36.73%
Due to unsustainable growth of air conditioning market, a great interest in solar cooling technologies has emerged. The coincidence between availability of solar irradiation and peaks of cooling demand makes solar cooling a very attractive option to replace conventional refrigeration machines based on electricity. What is more, solar cooling systems normally use natural refrigerants that are not harmful to the environment. However, an improvement of the current technology is needed for solar cooling systems to compete with electricity‐powered air conditioning systems. In this work, a novel air‐cooled single–double‐effect LiBr/H₂O absorption prototype is proposed as a solution to improve the viability of solar cooling systems. This prototype presents the following distinguishing features: firstly, it is directly air‐cooled, which means that no cooling tower is needed; secondly, it is made up by compact heat exchangers, which allows for a reduced size of about 1 m₃; thirdly, it incorporates an adiabatic absorber operating with flat‐fan solution sheets, which permits the working solution not to crystallize at high ambient temperatures; lastly, it can be powered by solar heat in its single‐effect mode (4.5 kW), or by an alternative source such as fuel or waste heat in its double‐effect stage (7 kW). In this way...

Linear IFMIF prototype accelerator (LIPAc) control system: design and development

Calvo Pinto, Julio
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
36.51%
Distributed real time control systems in scientific instruments, such as particle accelerators or telescopes, have emerged as a solution to control multiple interconnected devices, which required constant attention and observation, along with a complete integration of each of its parts. This enhancement is provided by the intense technological development that control devices have suffered in recent years. With respect to the control software, libraries and applications have also emerged in recent times. These sets of tools have been developed collaboratively in various laboratories and research centers worldwide. Experimental Physics and Industrial Control System (EPICS), a set of open source tools capable of controlling most of the devices necessary to operate a particle accelerator, can be pointed as a prime example of this progress. This thesis presents the design and development of the EPICS based control system for Linear IFMIF1 Prototype Accelerator (LIPAc), which construction involves several countries and it is currently being carried out in Rokkasho, Japan. LIPAc comprises a succession of devices and systems that focus and accelerate deuteron beam to an energy of 9 MeV with a current of 125mA, developing a previously unobtainable power of 1.125MW for that given energy. Therefore...

Virtual prototype simulation case study in mechatronic product development based on systems engineering approach

Carvajal Arango, Ricardo; Mej??a Guti??rrez, Ricardo
Fonte: Grupo de Investigaci??n en Ingenier??a de Dise??o - GRID; Design Engineering Research Group - GRID; Escuela de Ingenier??a Publicador: Grupo de Investigaci??n en Ingenier??a de Dise??o - GRID; Design Engineering Research Group - GRID; Escuela de Ingenier??a
Tipo: conferenceObject; Documento de conferencia; publishedVersion
ENG
Relevância na Pesquisa
36.63%
Nowadays consumers are demanding products richer in technologies and associated services -- That is why the link between disciplines, such as Engineering Design and Mechatronics, gets stronger each day, especially, due to the different functionalities and features that should be integrated in products in a more articulated manner -- In order to prepare the future generation of engineers, they should be aware and must know the supporting tools recently available in the market to support and automate these interactions among disciplines -- Regular engineering design approaches, start from requirements understanding and end with a physical prototype, passing by conceptual and detailed design -- Nevertheless, the product design process should allow engineering students to forecast product behaviour and its validation through simulation in early design phases, before physical prototyping -- In some cases, complexity increases as products require the integration of technical systems involving mechanics, electronics and control, among others -- Therefore, design concepts cannot be easily tested using a traditional CAD package that needs a physical prototype for validation purposes -- This article presents a case study using a Systems Engineering approach in academia (with RFLP Requirements/Functions/Logical/Physical) to develop a virtual prototype of a mechatronic product...

An academic design methodology for electrical mobility products - from necessity to functional prototype

Osorio G??mez, Gilberto; Mej??a Guti??rrez, Ricardo; Sierra Zuluaga, Luis Fernando
Fonte: Grupo de Investigaci??n en Ingenier??a de Dise??o - GRID; Design Engineering Research Group - GRID; Escuela de Ingenier??a Publicador: Grupo de Investigaci??n en Ingenier??a de Dise??o - GRID; Design Engineering Research Group - GRID; Escuela de Ingenier??a
Tipo: conferenceObject; Documento de conferencia; publishedVersion
ENG
Relevância na Pesquisa
36.51%
The undergraduate program in Product Design Engineering at EAFIT University-Colombia, includes an applied project course during eight semesters with different topics -- Students attend their last project course in seventh and eighth semester integrated into one year topic -- In this project, they have to design a new high-tech consumer product in electrical mobility for different types of transportation need and to construct a completely functional prototype -- The objectives of these courses are to focus on the triad of ???Product-User-Context??? as well as to foster design, engineering, manufacturing, management and entrepreneurship skills -- In order to offer a systematic way of working, and to obtain better results, a systematic design methodology has been adopted, adapted and applied during the whole product development process in order to facilitate representation, analysis, calculation, management and control of the information related to the product -- The methodology is broadly explained through activities, tools, information and results related to four main stages: 1) Need research & problem statement, 2) Conceptual design, 3) Detailed design and 4) Prototype construction & testing -- A successful case study is presented following all the stages of the presented methodology for the development of an Electric Power-Assisted Bicycle

Convergent validation of the narrative prototype of depression in one group of adolescents and one of intermediate and delayed adults in Bucaramanga; Validación convergente de la narrativa prototipo de la depresión en un grupo de adolescentes y uno de adultos intermedios y tardios en Bucaramanga; Avaliação convergente da narrativa protótipo da depressão num grupo de adolescentes e um de adultos intermédios e maiores na cidade de Bucaramanga

Leonardo Yovany, Álvarez Ramirez
Fonte: Pontificia Universidad Javeriana Cali Publicador: Pontificia Universidad Javeriana Cali
Tipo: info:eu-repo/semantics/article; "Artículo revisado por pares"; info:eu-repo/semantics/publishedVersion; Artículo Formato: application/pdf; application/pdf; application/pdf
POR; ENG; SPA
Relevância na Pesquisa
36.67%
The objective of this survey was to determine the identification by one group of adolescents, and another of middle-aged and older adults in the city of Bucaramanga, classified as depressives, with the narrative prototype of depression, in relation to their own life experience. Those taking part were 600 adolescents and 600 middle-aged and older adults, male and female, between 13 and 21 (adolescents) and 40 and 75 (middle-aged and older adults). They were selected using the SCID (Structured Clinical Interview for DSM Disorders), based on DSM-IV, and the Hamilton Depression Rating Scale (HDRS). The narrative prototype of depression was used as a reactive agent against which the participants had to identify themselves, or otherwise, according to their experience. A correlational case-control design was used to compare depressive adolescents with their non-depressive peers, and the same with the adults. The results show a value of Chisquared = 15.17 and 10.95 respectively for each group, which exceeded the expected rating, with Gl=4 and p<0.05, confirming the hypothesis that the depressive subjects in each group identify with the narrative prototype of depression, and that the non-depressives do not. The gama coefficient produced values J=-0.641 (adolescents) and J=-0.54 (middle-aged and older adults)...

Evaluative testing of a prototype barometer

HIDALGO,L. G.; HIDALGO,J. A.
Fonte: Centro de Ciencias de la Atmósfera, UNAM Publicador: Centro de Ciencias de la Atmósfera, UNAM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2011 EN
Relevância na Pesquisa
36.63%
The authors present the evaluative testing of a portable prototype of digital electronic barometer (UBII001). The prototype was developed in Venezuela although it includes low-cost multinational parts. The six year evaluation included response stability against atmospheric pressure variations. The UBII00 1 successfully passed a 550-1100 hPa test in the pressurization chamber of the Fondo de Metrología Legal (SENCAMER, Venezuela) and its responses remained within an acceptable ±0.1 hPa stability variation range. The prototype reached an absolute ±0.078 hPa exactitude better than that of ±0.1 hPa required by the World Meteorological Organization (WMO) and the International Civil Aviation Organization (ICAO) regulations for surface stations and airports. The information gathered here through the merging of measurement details with prototype characteristics represents a proven and replicable alternative of barometric development.

Prototype Selection Methods

Olvera López,José Arturo; Carrasco Ochoa,Jesús Ariel; Martínez Trinidad,José Francisco
Fonte: Centro de Investigación en computación, IPN Publicador: Centro de Investigación en computación, IPN
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2010 EN
Relevância na Pesquisa
36.58%
In pattern recognition, supervised classifiers assign a class to unseen objects or prototypes. For classifying new prototypes a training set is used which provides information to the classifiers during the training stage. In practice, not all information in a training set is useful therefore it is possible to discard some irrelevant prototypes. This process is known as prototype selection and it is the main topic of this thesis. Through prototype selection the training set size is reduced which allows reducing the runtimes in the classification and/or training stages of classifiers. Several methods have been proposed for selecting prototypes however their performance is strongly related to the use of a specific classifier and most of the methods spend long time for selecting prototypes when large datasets are processed. In this thesis, four methods for selecting prototypes, which solve drawbacks of some methods in the state of the art are proposed. The first two methods are based on the sequential floating search and the two remaining methods are based on clustering and prototype relevance respectively.