Enhancing Agent Mediated Electronic Markets with Ontology Matching Services and Social Network Support

Os Mercados Eletrónicos atingiram uma complexidade e nível de sofisticação tão elevados, que tornaram inadequados os modelos de software convencionais. Estes mercados são caracterizados por serem abertos, dinâmicos e competitivos, e constituídos por várias entidades independentes e heterogéneas. Tais entidades desempenham os seus papéis de forma autónoma, seguindo os seus objetivos, reagindo às ocorrências do ambiente em que se inserem e interagindo umas com as outras. Esta realidade levou a que existisse por parte da comunidade científica um especial interesse no estudo da negociação automática executada por agentes de software [Zhang et al., 2011]. No entanto, a diversidade dos atores envolvidos pode levar à existência de diferentes conceptualizações das suas necessidades e capacidades dando origem a incompatibilidades semânticas, que podem prejudicar a negociação e impedir a ocorrência de transações que satisfaçam as partes envolvidas. Os novos mercados devem, assim, possuir mecanismos que lhes permitam exibir novas capacidades, nomeadamente a capacidade de auxiliar na comunicação entre os diferentes agentes. Pelo que, é defendido neste trabalho que os mercados devem oferecer serviços de ontologias que permitam facilitar a interoperabilidade entre os agentes. No entanto, os humanos tendem a ser relutantes em aceitar a conceptualização de outros, a não ser que sejam convencidos de que poderão conseguir um bom negócio. Neste contexto, a aplicação e exploração de relações capturadas em redes sociais pode resultar no estabelecimento de relações de confiança entre vendedores e consumidores, e ao mesmo tempo, conduzir a um aumento da eficiência da negociação e consequentemente na satisfação das partes envolvidas. O sistema AEMOS é uma plataforma de comércio eletrónico baseada em agentes que inclui serviços de ontologias, mais especificamente, serviços de alinhamento de ontologias, incluindo a recomendação de possíveis alinhamentos entre as ontologias dos parceiros de negociação. Este sistema inclui também uma componente baseada numa rede social, que é construída aplicando técnicas de análise de redes socias sobre informação recolhida pelo mercado, e que permite melhorar a recomendação de alinhamentos e auxiliar os agentes na sua escolha. Neste trabalho são apresentados o desenvolvimento e implementação do sistema AEMOS, mais concretamente: • É proposto um novo modelo para comércio eletrónico baseado em agentes que disponibiliza serviços de ontologias; • Adicionalmente propõem-se o uso de redes sociais emergentes para captar e explorar informação sobre relações entre os diferentes parceiros de negócio; • É definida e implementada uma componente de serviços de ontologias que é capaz de: • o Sugerir alinhamentos entre ontologias para pares de agentes; • o Traduzir mensagens escritas de acordo com uma ontologia em mensagens escritas de acordo com outra, utilizando alinhamentos previamente aprovados; • o Melhorar os seus próprios serviços recorrendo às funcionalidades disponibilizadas pela componente de redes sociais; • É definida e implementada uma componente de redes sociais que: • o É capaz de construir e gerir um grafo de relações de proximidade entre agentes, e de relações de adequação de alinhamentos a agentes, tendo em conta os perfis, comportamento e interação dos agentes, bem como a cobertura e utilização dos alinhamentos; • o Explora e adapta técnicas e algoritmos de análise de redes sociais às várias fases dos processos do mercado eletrónico. A implementação e experimentação do modelo proposto demonstra como a colaboração entre os diferentes agentes pode ser vantajosa na melhoria do desempenho do sistema e como a inclusão e combinação de serviços de ontologias e redes sociais se reflete na eficiência da negociação de transações e na dinâmica do mercado como um todo.

Detecting and sorting targeting peptides wtih neural networks and support vector machines

This paper presents a composite multi-layer classifier system for predicting the subcellular localization of proteins based on their amino acid sequence. The work is an extension of our previous predictor PProwler v1.1 which is itself built upon the series of predictors SignalP and TargetP. In this study we outline experiments conducted to improve the classifier design. The major improvement came from using Support Vector machines as a "smart gate" sorting the outputs of several different targeting peptide detection networks. Our final model (PProwler v1.2) gives MCC values of 0.873 for non-plant and 0.849 for plant proteins. The model improves upon the accuracy of our previous subcellular localization predictor (PProwler v1.1) by 2% for plant data (which represents 7.5% improvement upon TargetP).

Social support in cyberspace: A content analysis of communication within a Huntington’s Disease online support group

Objective: Huntington’s Disease (HD) is an inherited disorder, characterised by a progressive degeneration of the brain. Due to the nature of the symptoms, the genetic element of the disease and the fact that there is no cure, HD patients and those in their support network often experience considerable stress and anxiety. With an expansion in Internet access, individuals affected by HD have new opportunities for information retrieval and social support. The aim of this study is to examine the provision of social support in messages posted to a HD online support group bulletin board. Methods: In total, 1313 messages were content analysed using a modified version of the Social Support Behaviour Code developed by Cutrona & Suhr (1992). Results: The analysis indicates that group members most frequently offered informational (56.2%) and emotional support (51.9%) followed by network support (48.4%) with esteem support (21.7%) and tangible assistance (9.8%) least frequently offered. Conclusion: This study suggests that exchanging informational and emotional support represents a key function of this online group. Practice implications: Online support groups provide a unique opportunity for health professionals to learn about the experiences and views of individuals affected by HD and explore where and why gaps may exist between evidence-based medicine and consumer behaviour and expectations.

Pseudomonas fluorescens lipase immobilization on polysiloxane-polyvinyl alcohol composite chemically modified with epichlorohydrin

The technique based on sol-gel approach was used to generate silica matrices derivatives by hydrolysis of silane compounds. The present work evaluates a hybrid matrix obtained with tetraethoxysilane (TEOS) and polyvinyl alcohol (PVA) on the immobilization yield of lipase from Pseudomonas fluorescens. The resulting polysiloxane-polyvinyl alcohol (POS-PVA) matrix combines the property of PVA as a suitable polymer to retain proteins with an excellent optical, thermal and chemical stability of the host silicon oxide matrix. Aiming to render adequate functional groups to the covalent binding with the enzyme the POS-PVA matrix was chemically modified using epichlorohydrin. The results were compared with immobilized derivative on POS-PVA activated with glutaraldehyde. Immobilization yield based on the recovered lipase activity depended on the activating agent and the highest efficiency (32%) was attained when lipase was immobilized on POS-PVA activated with epichlorohydrin, which, probably, provided more linkage points for the covalent bind of the enzyme on the support. This was confirmed by determining the morphological properties using different techniques as X-ray diffraction and scanning electron microscopy (SEM). Comparative studies were carried out to attain optimal activities for free lipase and immobilized systems. For this purpose, a central composite experimental design with different combinations of pH and temperature was performed. Enzymatic hydrolysis with the immobilized enzyme in the framework of the Michaelis-Menten mechanism was also reported. Under optimum conditions, the immobilized derivative on POS-PVA activated with epichlorohydrin showed to have more affinity for the substrate in the hydrolysis of olive oil, with a Michaelis-Menten constant value (K-m) of 293 mM, compared to the value of 401 mM obtained for the immobilized lipase on support activated with glutaraldehyde. Data generated by DSC showed that both immobilized derivatives have similar thermal stabilities. (C) 2007 Elsevier B.V. All rights reserved.

The future of cognitive and behavioral therapies in the prevention and early management of psychosis: Opportunities and risks

Behavioral and cognitive interventions for people with psychosis have a long and distinguished history, although the evidence for their application to young people remains limited. We anticipate that the next decades will show substantial research into psychological intervention for this population. Important targets will include the management of environmental stressors, reduction of substance misuse, and promotion of early treatment. Psychological management of positive symptoms, depression, and suicidal behavior will continue to be critical objectives. Important secondary prevention goals will be the retention of cognitive functioning, vocational options, social skills, and social network support, including appropriate family support. We expect primary prevention to include both universal programs and interventions for adolescents at particularly high risk. Technical innovations will include increasing use of Internet-based intervention and behavior cueing devices. Pressures for intervention brevity will continue, as will problems with the systematic delivery of effective procedures.

Mulheres mães vítimas de violência : impactos, vivências e constituição da rede de apoio sócio afetiva

A violência está presente a nível nacional e mundial no cotidiano de muitas famílias e se configura como um fenômeno de múltiplas determinações, podendo estar presente no cenário público e privado. Diante dos diversos tipos de violência presentes no espaço social, encontra-se a violência praticada pelo homem contra sua companheira. O presente estudo, com enfoque qualitativo, objetivou de maneira geral investigar de que forma o Centro de Referência Especializado da Assistência Social – Proteção e Atendimento Especializado a Famílias e Indivíduos (CREAS PAEFI “Adulto”) do município de Colatina, compõe a rede de apoio social e afetiva de mulheres/mães vítimas de violência física e/ou psicológica por parte de seus maridos/companheiros na percepção dos profissionais atuantes no serviço e, também, na percepção das próprias mulheres vítimas de violência usuárias do serviço. Para tanto, participaram da pesquisa 10 mulheres/mães usuárias do CREAS PAEFI “Adulto” do município de Colatina/ES, com faixa etária variando de 34 a 45 anos, que sofreram violência física e/ou psicológica por parte de seus maridos/companheiros e que possuíam pelo menos um filho. Também participaram da pesquisa 6 profissionais, com faixa etária variando de 25 a 38 anos, que faziam parte da equipe técnica do serviço. Os dados foram coletados por meio de entrevistas semi estruturadas realizadas individualmente em sala cedida pelo CREAS PAEFI “Adulto”. Para a organização dos dados utilizou-se a Análise de Conteúdo, sendo estes organizados em eixos temáticos e discutidos com base na Teoria Bioecológica do Desenvolvimento Humano de Urie Bronfenbrenner. Como resultados principais, pode-se notar que as interações estabelecidas entre os profissionais e as mulheres vítimas de violência usuárias do CREAS favoreceram processos proximais que promoveram mudanças positivas nas características pessoais das mulheres e reforçaram as relações que elas possuíam com suas famílias, principalmente com os filhos. Também foi verificado no macrossistema, que os papéis sociais estabelecidos pela sociedade para o homem e para a mulher estavam presentes nos discursos das usuárias do serviço, os quais naturalizavam a mulher como responsável pelos filhos, casa e marido, e o homem como o provedor da casa. A maternidade foi considerada por todas as usuárias como um fator importante em suas vidas e causou mudanças na dinâmica familiar com o companheiro.Verificou-se o comprometimento e envolvimento dos profissionais no atendimento às mulheres que se mostraram interessadas e engajadas com o atendimento e que tinham o objetivo de reconstruir suas vidas. A articulação do CREAS com a rede de atendimento à mulher vítima de violência no município de Colatina foi considerada satisfatória, principalmente levando em consideração o fato de que a cidade é pequena, o que facilita o contato entre os serviços. Algumas mulheres expuseram outras fontes de apoio que atuaram concomitantemente ao CREAS como, os amigos e a religião (Deus). Conclui-se que o CREAS PAEFI foi um serviço integrante da rede de apoio sócio afetiva das mulheres vítimas de violência que participaram do estudo, atuando como um microssistema significativo que favoreceu o desenvolvimento das mulheres frente à situação de violência vivenciada

Estimativa dos parâmetros de compactação de solos usando técnicas de data mining

Dissertação de mestrado integrado em Engenharia Civil

Difficult-to-engage patients: a specific target for time-limited assertive outreach in a Swiss setting.

OBJECTIVE: Assertive community treatment (ACT) failed to develop in Europe, and its efficacy is debated. In Lausanne, Switzerland, ACT focuses on difficult-to-engage patients and aims to facilitate linkage with outpatient care through time-limited interventions. This study aimed to evaluate the applicability and efficiency of time-limited ACT. METHODS: We retrospectively assessed social, clinical, and functional outcomes and motivation for treatment in 75 consecutively seen subjects treated between 2000 and 2002. RESULTS: With 70% of the interventions lasting less than 6 months, we observed significant improvement in most clinical and social problems, in collaboration, in motivation for treatment, and in social network support, despite high baseline levels of clinical and social problems. The number of hospitalizations decreased significantly. CONCLUSIONS: Time-limited ACT is a useful treatment for difficult-to-engage patients with severe clinical and social problems, and it facilitates linkage to care. This narrower target for ACT may facilitate its implementation in Europe.

Epälineaaristen regressiomenetelmien vertaaminen robottikäden otemallinnuksessa

Tässä työssä verrattiin monikerrosperseptronin, radiaalikantafunktioverkon, tukivektoriregression ja relevanssivektoriregression soveltuvuutta robottikäden otemallinnukseen. Menetelmille ohjelmoitiin koeympäristö Matlabiin, jossa mallit koestettiin kolmiulotteisella kappaledatalla. Koejärjestely sisälsi kaksi vaihetta. Kokeiden ensimmäisessä vaiheessa menetelmille haettiin sopivat parametrit ja toisessa vaiheessa menetelmät koestettiin. Kokeilla kerättiin dataa menetelmien keskinäiseen vertailuun. Vertailussa huomioitiin laskentanopeus, koulutusaika ja tarkkuus. Tukivektoriregressio löydettiin potentiaaliseksi vaihtoehdoksi mallintamiseen. Tukivektoriregression koetuloksia analysoitiin muita menetelmiä enemmän hyvien koetulosten takia.

Tietojohtamista tukevan toiminnanohjausjärjestelmän vaatimuksia erityistoimialalla: tapaustutkimus eläinterveydenhuollon toimialalla

Veterinary Health Services are following in many areas the practices and medical direction of human medicine and health services. They are reaching for improved efficiency, quality and precision. Competitive position may be improved and productivity increased by specializing and focusing efforts at the practice. This thesis focuses in small animal practices and their needs for ERP (Enterprise Resource Planning) systems in Germany. As a result requirements for ERP solution supporting knowledge management in the small animal practice is presented. Veterinary Health Services is knowledge-intensive business, where written information and tacit knowledge is increasingly bound together with deepening expertise and specialization. Veterinarian is even legally obliged to develop and maintain her professional skills. The current ERP solutions concentrate in the treatment process of veterinary practice. Customer relationship management is left aside. As the competitive situation is getting tighter in veterinary services also the customer relationship management needs to get into the focus and interest to the wider network support in knowledge sharing should take steps forward. Taking into account the requirement of continuous development of professional skills ERP system at the veterinary practice should also be seen as knowledge management tool. It should provide the possibility to create, store, share and use knowledge. The study is conducted first by studying the AS-IS situation of ERP use and market in veterinary health services and then drawing the requirements of TO-BE situation by studying literature and the results of semi qualitative study conducted for German veterinary practices. A group of veterinarians were interviewed, market and network analysis was done and the understanding of market was deepened in two veterinary conferences in Germany. This theses work is requested by Finnish software company Finnish Net Solutions, which is the leading supplier of Veterinary Practice Management software in Finland. The company plans to expand to European market with Cloud based service. Target of the theses is to create understanding of the requirements of German veterinary market to develop ERP solution supporting Knowledge Management in Veterinary Practice.

Parallel and distributed computing with Java

The Java language first came to public attention in 1995. Within a year, it was being speculated that Java may be a good language for parallel and distributed computing. Its core features, including being objected oriented and platform independence, as well as having built-in network support and threads, has encouraged this view. Today, Java is being used in almost every type of computer-based system, ranging from sensor networks to high performance computing platforms, and from enterprise applications through to complex research-based.simulations. In this paper the key features that make Java a good language for parallel and distributed computing are first discussed. Two Java-based middleware systems, namely MPJ Express, an MPI-like Java messaging system, and Tycho, a wide-area asynchronous messaging framework with an integrated virtual registry are then discussed. The paper concludes by highlighting the advantages of using Java as middleware to support distributed applications.

Artificial immune systems for classification of petroleum well drilling operations

This paper presents two approaches of Artificial Immune System for Pattern Recognition (CLONALG and Parallel AIRS2) to classify automatically the well drilling operation stages. The classification is carried out through the analysis of some mud-logging parameters. In order to validate the performance of AIS techniques, the results were compared with others classification methods: neural network, support vector machine and lazy learning.

Desenvolvimento de um sistema para navegação de robôs móveis por caminhos em plantações

The use of mobile robots in the agriculture turns out to be interesting in tasks of cultivation and application of pesticides in minute quantities to reduce environmental pollution. In this paper we present the development of a system to control an autonomous mobile robot navigation through tracks in plantations. Track images are used to control robot direction by preprocessing them to extract image features, and then submitting such characteristic features to a support vector machine to find out the most appropriate route. As the overall goal of the project to which this work is connected is the robot control in real time, the system will be embedded onto a hardware platform. However, in this paper we report the software implementation of a support vector machine, which so far presented around 93% accuracy in predicting the appropriate route.

Práticas parentais maternas e a influência de variáveis familiares e do bebê

Parenting practices can be understood as the behaviors emitted by parents to educate and socialize their children. The present study investigates the influence of the parenting practices according to the baby sex and age, family configuration and number of children. For this, 50 adult mothers were questioned according to the Parental Styles Inventory for Mothers with Babies (IEPMB). An analysis with the results indicates that mothers with baby girls normally uses a more Positive Monitoring practice when compared with mothers with boy babies. A positive correlation (r = +0.54, p <0.001) was found, between the age of the baby and the practice of negligence, meaning that there is an increase of the usage in the practical as the baby age increases. Also a significant difference (p = 0.04) in the Inconsistent Punishment practice pointed out to the fact that mothers from nuclear families seem to use this practice more than mothers from other family configurations. And multiparous mothers use more Physical Abuse practical than primiparous mothers (p = 0.02). Concerning this analysis, we support a discussion in the present work about the importance of interventions that focus on the effect of specific positive practices, the reduction of negative practices and the role of the network support on the children development.