834 resultados para IT Security, Internet, Personal Firewall, Security Mechanism, Security System, Security Threat, Security Usability, Security Vulnerability
Resumo:
Shkiset palvelut ovat tulleet keskeiseksi osaksi Lappeenrannan seudun opiskelija-asuntostin (LOAS) sisist ja ulkoista tiedottamista. Tiedon nopea saatavuus ja yksinkertainen kytettvyys ovat avainasemassa kehitettess uusia jrjestelmi. Uuden sukupolven kyttjt ovat tottuneet tiedon saatavuuden helppouteen, joten tiedon tulee olla selkesti esill ja siihen on pstv ksiksi nopeasti. Diplomityn tavoitteena oli tutkia ja kehitt LOAS:n sisisi ja ulospin asiakkaille tarjottavia shkisi palveluita. Kehitettvt palvelut olivat intranet, Internet-sivut ja Maestro Opas-asiakashallinta. LOAS:n palvelut on hajautettu usean eri ohjelman vlille, joten se aiheuttaa ongelmia informaation siirrossa jrjestelmien vlill. Tyss shkisten palveluiden kytettvyytt parannettiin lyhentmll polkuja ja koostamalla palveluita kokonaisuuksiksi. Tyn lopputuloksena LOAS:ll on kytssn yksinkertaisemmat Internet-sivut ja selkempi intranet-nkym. Palveluiden kytettvyyden ja vaikuttavuuden arviointi suoritettiin itsenisen perehtymisen ongelmakohtiin ja henkilhaastatteluina. Haastatteluilla kartoitettiin kyttjien palvelun tarpeita, jonka avulla kehitettvt kohteet pystyttiin mrittelemn. Palveluiden kytettvyytt parantamalla asukkaita pyritn ohjaamaan tarjottavien palveluiden piiriin. Tllin asukkaille tarjottavien palveluiden laatua pystytn parantamaan. LOAS:n tulisi kuitenkin tarkastella erilaisia ratkaisuja toimintojen yhdistmiseen. Tmn avulla asukkaiden kaikki liikkuminen pystyttisiin ksittelemn yhden ohjelman avulla.
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The aim of this work is to evaluate the mechanism of stock removal and the ground surface quality of advanced ceramics machined by a surface grinding process using diamond grinding wheels. The analysis of the grinding performance was done regarding the cutting surface wear behavior of the grinding wheel for ceramic workpieces. The ground surface was evaluated using Scanning Electron Microscopy (SEM). As a result it can be said that the mechanism of material removal in the grinding of ceramic is largely one of brittle fracture. The increase of the h max can reduce the tangential force required by the process. Although, it results in an increase in the surface damage, reducing the mechanical properties of the ground component.
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Internet of Things or IoT is revolutionizing the world we are living in, similarly the way Internet and the web did few decades ago. It is changing how we interact with the things surrounding us. Electronic health and remote patient monitoring are the ways of utilizing these technological improvements towards the healthcare. There are many applications of IoT in eHealth such as, it will open the gate to provide healthcare to the remote areas of the world, where healthcare through traditional hospital systems cannot be provided. To connect these new eHealth IoT systems with the existing healthcare information systems, we can use the existing interoperability standards commonly used in healthcare information systems. In this thesis we implemented an eHealth IoT system based on Health Level 7 interoperability standard for continuous data transmission. There is not much previous work done in implementing the HL7 for continuous sensor data transmission. Some of the previous work was limited to sensors which are not continuous in nature and some of it is only theatrical architecture. This thesis aims to prove that it is possible to implement an eHealth IoT system by using sensors which require continues data transmission, such as respiratory sensors, and to connect it with the existing eHealth information system semantically by using HL7 interoperability standard. This system will be beneficial in implementing eHealth IoT systems for those patients, who requires continuous healthcare personal monitoring. This includes elderly people and patients, whose health need to be monitored constantly. To implement the architecture, HL7 v2.5 is selected due to its ease of implementation and low size. We selected some open source technologies because of their open licenses and large developer community. We will also review the most efficient technology available in every layer of eHealth IoT system and will propose an efficient system.
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Cette thse porte sur lappropriation dInternet par les visiteurs des centres daccs public cette technologie installs par le gouvernement et les ONG au Chili au dbut des annes 2000. Limplantation de ces centres sinsre dans une politique officielle daccs une technologie qui est considre comme un outil de dveloppement. Les autorits sappuient sur un discours plus large qui fait rfrence la Socit de linformation et au besoin de la population de participer adquatement celle-ci; laccs et la matrise des technologies de linformation et communication, et en particulier lInternet, permettrait aux personnes de bnficier des avantages de cette nouvelle socit. Conscients que ce nest pas toute la population qui peut sabonner un service dInternet domicile, les tlcentres aideraient les personnes faible revenu le faire. Au niveau thorique, nous avons mobilis certaines notions lies aux tudes sur les usages des technologies. Plus spcifiquement, nous nous sommes servis du modle de lappropriation qui se penche sur la construction des significations que font les personnes de lusage dune technologie. Ce modle montre la complexit du processus et les facteurs dordre personnel et social qui entrent en jeu. Selon ce modle, le contexte social est cl pour comprendre la construction de la signification sur lusage. Nous faisons aussi rfrence dautres tudes qui se penchent sur les diffrents moments de lappropriation : la domestication, les propos de Michel de Certeau et la sociopolitique des usages. Finalement, nous proposons de considrer certains facteurs qui peuvent avoir une influence dans le processus dappropriation, tels que les reprsentations des usagers, le contexte socio-conomique, le rseau dappui et le genre. Dun point de vue mthodologique, tant donn que nous voulions explorer un phnomne sans pour autant faire de gnralisations, nous avons utilis une dmarche qualitative et comme stratgie de recherche, lethnographie. Nous avons visit 5 tlcentres dans 4 villes ou villages de diffrentes rgions du Chili. Nous avons fait des observations et des entrevues semi-ouvertes avec des usagers, des responsables des tlcentres et les responsables des rseaux de tlcentres. La thse montre la complexit du processus dappropriation et la spcificit de lappropriation dInternet dans les centres daccs public. Nous avons constat comment les relations interpersonnelles le rseau dappui- jouent un des rles les plus importants dans le processus de rapprochement au centre et la technologie, ainsi que dans le processus dapprentissage et dusage mme. Nous avons constat galement que la construction de la signification de lusage est troitement lie au contexte et aux expriences de vie des personnes. Un mme usage na pas la mme signification pour tous nos interviews : pour certains, le clavardage peut tre seulement une activit de loisir et pour quelquun dautre, un outil de dveloppement personnel et motionnel. Les projections sur les usages futurs ne sont pas les mmes non plus chez les adultes et chez les plus jeunes, ces derniers tant davantage conscients de lInternet comme un outil de travail. Linterprtation de lusage diffre aussi entre les hommes et les femmes (plus que les usages mmes): certaines femmes voient dans lusage dInternet et dans la participation au tlcentre une activit qui les fait sortir de leur rle typique de femme au foyer. Finalement, nous avons observ que la signification de lusage nest pas seulement construite partir de lexprience personnelle immdiate; les usages des autres sont toujours valus par les visiteurs des tlcentres.
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El estudio se realiz en 2014 para establecer la prevalencia de los factores de riesgo psicosocial en el personal civil y militar en una unidad militar de Bogot D.C. De una poblacin universo de 632 funcionarios, se tom por muestreo probabilstico aleatorio a 264 funcionarios a quienes se les aplic los cuestionarios para la evaluacin de Factores de Riesgo Psicosocial Intralaboral, extralaboral, sntomas de estrs y la ficha de datos sociodemogrficos y ocupacionales, de la Batera de Instrumentos del Ministerio de Trabajo Colombia [1]. El estudio permiti establecer que los niveles de riesgo con sntomas de estrs son altos; el 61,74% presenta riesgo Muy alto y Alto, el 15,53% riesgo medio y 22.73% riesgo Bajo y Muy bajo. El riesgo ms alto lo presentan los oficiales, seguido del personal civil y suboficiales. De mantenerse las condiciones actuales sin intervencin fcilmente podran incrementarse y de acuerdo con el modelo sistmico expuesto por Villalobos 2005, se podran asociar a respuestas de estrs [2], por tanto se recomienda implementar un Sistema de Vigilancia Epidemiolgica para riesgo psicosocial con base en los diagnsticos y sistema de gestin en seguridad y salud en el trabajo, donde se involucre personal con diagnstico de patologa mental.
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La revolucin del internet ha llevado a muchos cambios. Con el paso del tiempo, dependemos menos de los papeles y ms de los archivos digitales. Los niveles de informacin han incrementado exponencialmente y la interconectividad que han brindado servicios como redes sociales se encuentra en niveles jams pensados hace media dcada. Sin embargo, el mercado laboral tradicional ha visto pocos cambios; a pesar de que han surgido numerosas ocupaciones y desaparecido puestos del mismo modo, la gran mayora de personas se ven obligadas a buscar el sustento propio y de sus familias dedicndole una cantidad considerable de tiempo a su trabajo y dejando de lado muchos otros asuntos pertinentes al hogar, a los negocios e incluso asuntos personales. El sistema de adquisicin de servicios se encuentra completamente estancado. En Colombia, segn cifras de 2011 del Departamento Administrativo Nacional de Estadistica (DANE), existen ms de 10 millones de viviendas y ms de 500.000 establecimientos de comercio, que por lo menos una vez por ao tienen un reparo para hacer, por esta razn, se genera una amplia demanda en la prestacin de este tipo de servicios. Miles de personas continan sin encontrar servicios especficos a sus necesidades en el momento adecuado, incluso cuando existe dinero destinado hacia los mismos, en gran parte debido a los esquemas tradicionales y la inhabilidad de conectar necesidades con servicios. Este emprendimiento busca cambiar ese esquema tradicional de las pginas amarillas, los clasificados y otras fuentes que se han quedado en el siglo XX como medio publicitario de trabajos realizados por independientes en temas relacionados con el hogar u oficina y abrir camino hacia una nueva forma de encontrar un apareamiento en tiempo real y enfocado en los consumidores, creando una sitio web y posteriormente aplicaciones mviles, en la que cada cliente puede comparar los precios estandarizados de cada servicio del hogar, pagar electrnicamente lo pactado y dejar calificaciones del servicio posteriormente; cambiando el estilo de negociacin de modo ms formal y bajo un esquema que logre acuerdos mutuamente beneficiales. En el corto plazo, se busca que las personas puedan considerar alternativas a los esquemas existentes para dar a satisfacer sus necesidades. En el mediano y largo plazo el objetivo del 4 proyecto es romper los paradigmas en los mismos que se han mantenido desde tanto tiempo y revolucionar su funcionamiento conforme a las herramientas existentes en la actualidad. El siguiente proyecto tiene como propuesta proveer una solucin completa para los hogares y establecimientos comerciales en trminos de adquisicin de servicios prestados por personas independientes y con poca o nula regulacin en el mercado actual. Es una propuesta que permite cambiar la logstica y el modelo de negociacin de mediante una herramienta virtual que adicionalmente brinde una respuesta ms rpida y facilidad de uso.
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Introduccin. En Colombia, el 80% de los pacientes con enfermedad renal crnica en hemodilisis tienen fstula arteriovenosa perifrica (FAV) que asegura el flujo de sangre durante la hemodilisis (1), la variabilidad en el flujo de sangre en el brazo de la FAV hacia la parte distal, puede afectar la lectura de la oximetra de pulso (SpO2) (2), llevando a la toma de decisiones equivocadas por el personal de salud. El objetivo de este estudio es aclarar si existe diferencia entre la SpO2 del brazo de la FAV y el brazo contralateral. Materiales y mtodos. Se realiz un estudio de correlacin entre los valores de SpO2 del brazo con FAV contra el brazo sin FAV, de 40 pacientes que asistieron a hemodilisis. La recoleccin de los datos se llev a cabo, con un formato que incluy el resultado de la pulsioximetria y variables asociadas, antes, durante y despus de la hemodilisis. Se compar la mediana de los deltas de las diferencias con pruebas estadsticas T Student Mann Whitney, aceptando un valor significativo de p < 0,05. Resultados. No se encontraron diferencias estadsticamente significativas de la SpO2 entre el brazo con FAV y el brazo sin FAV, antes, durante y despus de la dilisis, sin embargo si se apreci una correlacin positiva estadsticamente significativa. Conclusiones. Se encontr correlacin positiva estadsticamente significativa, donde no hubo diferencias en el resultado la pulsioximetra entre el brazo con FAV y brazo sin FAV, por lo tanto es vlido tomar la pulsioximetra en cualquiera de los brazos.
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Users are facing an increasing challenge of managing information and being available anytime anywhere, as the web exponentially grows. As a consequence, assisting them in their routine tasks has become a relevant issue to be addressed. In this paper, we introduce a software framework that supports the development of Personal Assistance Software (PAS). It relies on the idea of exposing a high level user model in order to increase user trust in the task delegation process as well as empowering them to manage it. The framework provides a synchronization mechanism that is responsible for dynamically adapting an underlying BDI agent-based running implementation in order to keep this high-level view of user customizations consistent with it.
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The new economy stimulated by the bigger Internet participation as an interaction mean between people and business has been changing the companies management routine. Nowadays, Internet access goes through telephones, in the houses and offices, or through nets of the Intranet kind, with the users in their working settings. The Internet personal access added, with mobility, surely will bring changes to our contacting form to the outside world as well as it will create a possibility of giving the customers a bigger variety of products and services. The present study aims are: (i) to verify the customers behaviours related to this new media, presented in the mobiles digital screens; (ii) to explore some of their main features, and (iii) to compare them with the other media features, as the radio and the TV ones. The applied research methodology was the data collecting through phone interviews. To obtain a Confidence Interval of 95%, 470 WAP, Internet, radio and TV current users answers were gotten. To compare the media, the Fishbein multi-attributes model was used what possibilities to form comparative scores of the attributes built for the research. To mark the discussion concerning the public behaviour related to the differentiated use of the mentioned media out, the study produced uses the McLuhan theoretical reference (1969), specially concerning to his theoretical building, denominated hot and cold means. But this referential theoretic mark could not be supported by the accomplished quantitative study result. The comparison of built attribute scores averages has differentiated the hot media WAP, like radio, as well as the cold media one, like TV. This way, showing that the access new technology appearance, WAP, not only enlarges the Internet use, but also appoints to a new theoretic classification possibility to this new media. The accomplished quantitative research revealed that, through the user point of view, the Contents category is considered as one of the most important WAP aspects. The TV and the radio received significantly lower grades in this subject. The public considers that is important that the WAP information is trustworthy, easy to find, available, sufficient and that attends the urgency expected by the user. It was observed that the WAP score emotion is inferior to the radio and TV and superior to the Internet ones. But, the differences found are not significant. Considering the low score of importance given to the attributes group emotion, is not recommended the WAP use as media when the emotional users aspects are wanted to be reached.
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In this paper, the dynamic behaviour of the "click" mechanism is analysed. A more accurate model is used than in the past, in which the limits of movement due to the geometry of the flight mechanism are imposed. Moreover, the effects of different damping models are investigated. In previous work, the damping model was assumed to be of the linear viscous type for simplicity, but it is likely that the damping due to drag forces is nonlinear. Accordingly, a model of damping in which the damping force is proportional to the square of the velocity is used, and the results are compared with the simpler model of linear viscous damping. Because of the complexity of the model an analytical approach is not possible so the problem has been cast in terms of non-dimensional variables and solved numerically. The peak kinetic energy of the wing root per energy input in one cycle is chosen to study the effectiveness of the "click" mechanism compared with a linear resonant mechanism. It is shown that, the "click" mechanism has distinct advantages when it is driven below its resonant frequency. When the damping is quadratic, there are some further advantages compared to when the damping is linear and viscous, provided that the amplitude of the excitation force is large enough to avoid the erratic behaviour of the mechanism that occurs for small forces. (C) 2011 Elsevier Ltd. All rights reserved.
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
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The aim of this work is to evaluate the mechanism of stock removal and the ground surface quality of advanced ceramics machined by a surface grinding process using diamond grinding wheels. The analysis of the grinding performance was done regarding the cutting surface wear behavior of the grinding wheel for ceramic workpieces. The ground surface was evaluated using Scanning Electron Microscopy (SEM). As a result it can be said that the mechanism of material removal in the grinding of ceramic is largely one of brittle fracture. The increase of the hmax can reduce the tangential force required by the process. Although, it results in an increase in the surface damage, reducing the mechanical properties of the ground component.
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Il mar Mediterraneo un bacino acquifero peculiare per la recente colonizzazione di specie aliene, per levento geologico legato alla Crisi di salinit del Messiniano e per lampio range di salinit. Lindividuazione dei meccanismi di colonizzazione si incentrata sullo studio morfologico, istologico e molecolare delle specie Asperarca nodulosa ed Anadara demiri (Arcidae-Bivalvia-Mollusca). La ricerca si basata sulla caratterizzazione morfologica, con utilizzo del microscopio elettronico a scansione, al fine di individuare il tipo di sviluppo larvale. Successivamente i dati rilevati al S.E.M. sono stati supportati dallindagine istologica che ha evidenziato la presenza di gonadi a sessi distinti e la non incubazione larvale. Lulteriore analisi filogenetica ha permesso di evidenziare la netta suddivisione tra le tre popolazioni studiate, indagine effettuata tramite marcatori arbitrari (RAPDs) e nucleari specifici (ITS). I risultati ottenuti trovano supporto da quanto noto su base morfologica. I dati, nel complesso, mostrano una perdita delle capacit di diffusione della specie tramite sviluppo larvale plantotrofico a favore di quello lecitotrofico o diretto; tale tesi ulteriormente supportata dai dati molecolari che mostrano una netta separazione delle popolazioni prese in esame ed un conseguente isolamento tra individui appartenenti a zone di profondit del Mediterraneo (sub-bacini abissali). La ricerca ha, inoltre,esaminato i meccanismi di introduzione attuali nel bacino acquifero che soggetto ad una nuova invasione da parte specie aliene dovuta allapertura del canale di Suez. Lanalisi si focalizzata sullo studio per l individuazione dellorigine della specie aliena A. demiri , di presunta derivazione Indo-Pacifica, ma rivelatasi, nei dati preliminari, di origine Atlantica.
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The Ph chromosome is the most frequent cytogenetic aberration associated with adult ALL and it represents the single most significant adverse prognostic marker. Despite imatinib has led to significant improvements in the treatment of patients with Ph+ ALL, in the majority of cases resistance developed quickly and disease progressed. Some mechanisms of resistance have been widely described but the full knowledge of contributing factors, driving both the disease and resistance, remains to be defined. The observation of rapid development of lymphoblastic leukemia in mice expressing altered Ikaros (Ik) isoforms represented the background of this study. Ikaros is a zinc finger transcription factor required for normal hemopoietic differentiation and proliferation, particularly in the lymphoid lineages. By means of alternative splicing, Ikaros encodes several proteins that differ in their abilities to bind to a consensus DNA-binding site. Shorter, DNA nonbinding isoforms exert a dominant negative effect, inhibiting the ability of longer heterodimer partners to bind DNA. The differential expression pattern of Ik isoforms in Ph+ ALL patients was analyzed in order to determine if molecular abnormalities involving the Ik gene could associate with resistance to imatinib and dasatinib. Bone marrow and peripheral blood samples from 46 adult patients (median age 55 yrs, 18-76) with Ph+ ALL at diagnosis and during treatment with imatinib (16 pts) or dasatinib (30 pts) were collected. We set up a fast, high-throughput method based on capillary electrophoresis technology to detect and quantify splice variants. 41% Ph+ ALL patients expressed high levels of the non DNA-binding dominant negative Ik6 isoform lacking critical N-terminal zinc-fingers which display abnormal subcellular compartmentalization pattern. Nuclear extracts from patients expressed Ik6 failed to bind DNA in mobility shift assay using a DNA probe containing an Ikaros-specific DNA binding sequence. In 59% Ph+ ALL patients there was the coexistence in the same PCR sample and at the same time of many splice variants corresponded to Ik1, Ik2, Ik4, Ik4A, Ik5A, Ik6, Ik6 and Ik8 isoforms. In these patients aberrant full-length Ikaros isoforms in Ph+ ALL characterized by a 60-bp insertion immediately downstream of exon 3 and a recurring 30-bp in-frame deletion at the end of exon 7 involving most frequently the Ik2, Ik4 isoforms were also identified. Both the insertion and deletion were due to the selection of alternative splice donor and acceptor sites. The molecular monitoring of minimal residual disease showed for the first time in vivo that the Ik6 expression strongly correlated with the BCR-ABL transcript levels suggesting that this alteration could depend on the Bcr-Abl activity. Patient-derived leukaemia cells expressed dominant-negative Ik6 at diagnosis and at the time of relapse, but never during remission. In order to mechanistically demonstrated whether in vitro the overexpression of Ik6 impairs the response to tyrosine kinase inhibitors (TKIs) and contributes to resistance, an imatinib-sensitive Ik6-negative Ph+ ALL cell line (SUP-B15) was transfected with the complete Ik6 DNA coding sequence. The expression of Ik6 strongly increased proliferation and inhibited apoptosis in TKI sensitive cells establishing a previously unknown link between specific molecular defects that involve the Ikaros gene and the resistance to TKIs in Ph+ ALL patients. Amplification and genomic sequence analysis of the exon splice junction regions showed the presence of 2 single nucleotide polymorphisms (SNPs): rs10251980 [A/G] in the exon2/3 splice junction and of rs10262731 [A/G] in the exon 7/8 splice junction in 50% and 36% of patients, respectively. A variant of the rs11329346 [-/C], in 16% of patients was also found. Other two different single nucleotide substitutions not recognized as SNP were observed. Some mutations were predicted by computational analyses (RESCUE approach) to alter cis-splicing elements. In conclusion, these findings demonstrated that the post-transcriptional regulation of alternative splicing of Ikaros gene is defective in the majority of Ph+ ALL patients treated with TKIs. The overexpression of Ik6 blocking B-cell differentiation could contribute to resistance opening a time frame, during which leukaemia cells acquire secondary transforming events that confer definitive resistance to imatinib and dasatinib.
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This paper examines the adaptations of the writing system in Internet language in mainland China from a sociolinguistic perspective. A comparison is also made of the adaptations in mainland China with those that Su (2003) found in Taiwan. In Computer-Mediated Communication (CMC), writing systems are often adapted to compensate for their inherent inadequacies (such as difficulty in input). Su (2003) investigates the creative uses of the writing system on the electronic bulletin boards (BBS) of two college student organizations in Taipei, Taiwan, and identifies four popular and creative uses of the Chinese writing system: stylized English, stylized Taiwanese-accented Mandarin, stylized Taiwanese, and the recycling of a transliteration alphabet used in elementary education. According to Coupland (2001; cited in Su 2003), stylization is the knowing deployment of culturally familiar styles and identities that are marked as deviating from those predictably associated with the current speaking context. Within this framework and drawing on the data in previous publications on Internet language and online sources, this study identifies five types of adaptations in mainland Chinas Internet language: stylized Mandarin (e.g., piopio for beautiful), stylized dialect-accented Mandarin (e.g., huchng for very much), stylized English (e.g., ymier for email), stylized initials (e.g., bt binti for abnormal; pk, short form for player kill), and stylized numbers (e.g., 9494 jishi jishi that is it). The Internet community is composed of highly mobile individuals and thus forms a weak-tie social network. According to Milroy and Milroy (1992), a social network with weak ties is often where language innovation takes place. Adaptations of the Chinese writing system in Internet language provide interesting evidence for the innovations within a weak-tie social network. Our comparison of adaptations in mainland China and Taiwan shows that, in maximizing the effectiveness and functionality of their communication, participants of Internet communication are confronted with different language resources and situations, including differences in Romanization systems, English proficiency level, and attitudes towards English usage. As argued by Milroy and Milroy (1992), a weak-tie social network model can bridge the social class and social network. In the Internet community, the degree of diversity of the stylized linguistic varieties indexes the virtual and/or social status of its participants: the more diversified ones Internet language is, the higher is his/her virtual and/or social status.
