The purpose of this study was to determine the effects of physical exertion upon the heart rates and workload levels of five selected male freshman basketball players at Utah State University during actual game competition. One hour prior to each of the ten home basketball games, two E&M Surface Electrodes were mounted to the chest of the test subject with disposable double-sided adhesive washers. A biotelemetry transmitter, used for sending electrical signals from the player to a biotelemetry receive r and polygraph, was placed in a plastic sack and taped to the beltline of the subjects athletic supporter. The telemetry receiver and polygraph were located behind the Utah State University team bench. One subject was tested per game and each subject was tested twice throughout the study. The same subject was tested once every fifth home game. The data was collected with a polygraph, by means of radiotelemetry, and recorded according to mean heart (beats per minute), mean volume of oxygen (liters per minute), and mean workload (kilopondmeters per minute), which were the measurements used for the data in the statistical design. In each of these three categories, consideration and comparisons were made of: (A) offensive play, (B) ball handling, (C) defensive play, (D) defense on the ball, (E) fastbreak, (F) shooting, (G) scoring, and (H) rebounding. Data, concerning mean volume of oxygen and mean workload, were processed according to Astrand's Nomogram. A two way analysis of variance test was applied to the data to determine the significant difference between the variables. Another statistical analysis that was conducted on the data was a Newman Keuls Sequential Range Test for determining the significant difference between the eight different game situations studied throughout this study. The two way analysis of variance showed that there was a significant difference at the .05 level of confidence in the mean heart rate, mean volume of oxygen, and mean workload levels of the five subjects during the game situations mentioned above. The Newman Keuls Sequential Range Test indicated that a significant difference occurred at the .05 level between the ball handling activities (fastbreak, ball handling, and shooting) and the non-ball handling activities (rebounding, scoring, defense on the ball, defensive play, and offensive play). Also, this test showed that no significant difference occurred at the .05 level within the two groups of activities mentioned above.

A correlation between the USU stretch test and the pizza fork test would allow the stretch properties of Mozzarella cheese to be measured objectively. The Utah State University (USU) Stretch Test uses a modified texture-profile analyzer to pull strands of cheese from a melted reservoir, measuring the load exerted on the probe during stretching. Parameters measured by the USU stretch test include Melt Strength (FM), which is the maximum load exerted on the probe, Stretch Load (SL), which is the load exerted on the probe at any specified point following FM, and Stretch Extension (SE), which was defined as the extension of the probe at a selected load. To begin with, it was determined that the greatest repeatability and cheese performance was obtained by tempering 50 g of shredded cheese for 45 min at 65°C and using a three-pronged hook with a diameter of 25 mm as the probe. These conditions were then applied in a correlation study in which a low correlation was seen between the USU stretch test and the pizza fork test, with the greatest correlation being seen with FM (R2 = 0.22). A more extensive look at the effect of the tempering temperature used in the USU stretch test on the degree of correlation between the two tests was conducted by tempering cheeses at 65, 70, 75, 80, and 85 °C. In this experiment, the highest correlation between the two tests was seen at both 80 and 85°C. Values of R2 at 80°C for SL10-15 and SEF (Stretch Extension at FM) were 0.75 and 0.70, respectively. At 85°C, the highest degree of correlation was seen at SL10-15 (R2 = 0.72) and SE0.1 (R2 = 0.69). A multiple linear correlation study was also conducted. A high degree of correlation between the USU stretch test and the pizza fork test was seen at 80°C when two parameters were used (SEF and SL22, R2 = 0.85, Adj. R2 = 0.80) and when four parameters were used (FM, slope from 10 to 20 em, SE0.1, and SL22, R2 = 0.97, Adj. R2 = 0.93). A set of cheese was then analyzed by the USU stretch test and the pizza fork test at three different intervals of aging (21 , 40, and 60 days after manufacture). This data was combined with previously collected data to show that the USU stretch test can be used to characterize the functional properties of a cheese using the parameters of FM, SEF, as well as SE0.1. It was concluded that the USU stretch test can provide a better characterization of a pizza cheese than can the pizza fork test. Whereas the pizza fork test is only able to record the distance that the cheese can stretch, the USU stretch test is capable of measuring a variety of parameters, which provides not only an indication of how far the cheese will stretch, but also other important functional properties related to the cheese, such as viscosity, elasticity, and the thickness of the strands being stretched.

Made available in DSpace on 2016-04-04T18:31:39Z (GMT). No. of bitstreams: 1 Deivis Fernandes Pirani.pdf: 1504986 bytes, checksum: e4989c06d3fc9c76df085862e18609d0 (MD5) Previous issue date: 2014-02-07 / This paper shows a field-trial investigation comparing the use of IPv4 and IPv6 protocols on web pages access considering the real user perspective and the transition period from IPv4 to IPv6. To perform this study, it was developed a testbed in which three adressing configurations of Internet Protocol, IPv4, IPv6, and Duas Stack (IPv4+IPv6), were used to access the top 100 world most visited web pages with an IPv6 enabled address. In addiction, several software tools were developed, that enabled more than 600 simultaneous accesses between IPv4, IPv6 and Dual Stack, to each of these pages. Those accesses were performed every hour during the period of a month, enabling to obtain more than 20 GB of information on the web access. Results showed that lower loading times obtained by IPv6 and Dual Stack are related to the partial acquisition of the content. In fact, for IPv6, the number of web pages with faster loading times goes from 57 to 20% when the average number of bytes obtained by IPv6 and the IPv4 is similar. For Dual Stack the number goes from 25 to 5% given the same conditions. It was also noted that 18 of the 100 pages which were considered, no content would be presented to the user in more than 50% of the performed accesses. Regarding the preference for IPv6 instead of IPv4, on Dual Stack it was observed that 90% of the acquired content for 27 of 100 web pages was made by IPv6. / Este trabalho apresenta um estudo de campo, comparativo, sobre a utiliza??o dos protocolos IPv4 e IPv6 no acesso a p?ginas web. Foi considerada a perspectiva de um usu?rio real deste tipo de servi?o, no atual per?odo de transi??o do IPv4 para o IPv6. Para que tal estudo pudesse ser realizado, foi desenvolvido um arranjo no qual tr?s configura??es de endere?amento do Protocolo de Internet, IPv4, IPv6 e Pilha Dupla (IPv4+IPv6), foram utilizadas nos acessos ?s 100 p?ginas web, com suporte ao I v6, mundialmente mais visitadas. Al?m disso, foram desenvolvidas uma s?rie de shell scripts que possibilitaram mais de 600 acessos simult?neos do IPv4, IPv6 e Pilha Dupla, a cada uma dessas p?ginas. Tais acessos foram executados de hora em hora, durante o per?odo de um m?s, possibilitando a obten??o de mais de 20 GB de informa??es relativas ao acesso web. Os resultados do estudo mostraram que os tempos de carregamento menores obtidos pelo IPv6 e pela Pilha Dupla, est?o relacionados com a aquisi??o parcial do conte?do. De fato, para o IPv6, o n?mero de p?ginas web com tempos de carregamento menores diminui de 57 para 20% quando a m?dia do n?mero de bytes obtidos pelo IPv6 e pelo IPv4 ? similar. Para a Pilha Dupla, dadas as mesmas condi??es, o n?mero diminui de 25 para 5%. Tamb?m foi observado que para 18 das 100 p?ginas web consideradas, nenhum conte?do foi apresentado ao usu?rio em mais de 50% dos acessos efetuados. Com rela??o ? prefer?ncia pelo IPv6 ao IPv4, na Pilha Dupla, observou-se que 90% da aquisi??o do conte?do, de 27 das 100 p?ginas web, ocorreu pelo IPv6.

Made available in DSpace on 2014-12-17T15:48:13Z (GMT). No. of bitstreams: 1 LirisneiGS.pdf: 852828 bytes, checksum: d8e0d9662bced4742e1d852cf03d78a8 (MD5) Previous issue date: 2007-08-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work presents an User Interface (UI) prototypes generation process to the softwares that has a Web browser as a plataform. This process uses UI components more complex than HTML elements. To described this components more complex this work suggest to use the XICL (eXtensinble User Interface Components Language). XICL is a language, based on XML syntax, to describe UI Components and IUs. XICL promotes extensibility and reusability in the User Interface development process. We have developed two compiler. The first one compiles IMML (Interactive Message Modeling Language) code and generates XICL code. The second one compiles XICL code and generates DHTML code / Este trabalho apresenta um processo de gera??o de prot?tipos de Interfaces de Usu?rio (IU) para software que tem como plataforma operacional um navegador Web. Este processo faz o uso de componentes de interface de usu?rio mais complexos que os elementos HTML. Para descrever estes componentes mais complexos este trabalho sugere o uso da linguagem XICL (eXtensible User Interface Components Language). A XICL ? uma linguagem, baseada em XML, para a descri??o de componentes de IU e de IUs. A XICL permite reusabilidade e extensibilidade no desenvolvimento de interfaces de usu?rios. Foram desenvolvidos dois compiladores, um que gera c?digo XICL a partir de c?digo IMML (Interactive Message Modeling Language) e outro que a partir de XICL gera DHTML

Made available in DSpace on 2015-04-14T14:49:03Z (GMT). No. of bitstreams: 1 407757.pdf: 1892544 bytes, checksum: 1bac1747159590e341299a53c6807c04 (MD5) Previous issue date: 2008-12-17 / O teste de um sistema de gerenciamento de workflow se faz necess?rio no momento em que h? a necessidade de detec??o de erros na execu??o de sistemas que ap?iam processos de neg?cio. Como n?o ? vi?vel a realiza??o de testes exaustivos, esta pesquisa faz uso de teste estat?stico para que se tenha uma confiabilidade aceit?vel com um conjunto de testes menor. Sabe-se que as redes de Petri, al?m de possibilitarem a representa??o de informa??es estat?sticas, s?o um formalismo muito indicado para descrever processos de neg?cio. As informa??es relevantes ao teste estat?stico de workflow s?o representadas utilizando redes de Petri, para ent?o gerar casos de teste a partir de uma rede. Este trabalho tem o objetivo de apresentar uma solu??o para a gera??o de casos de teste para sistemas de gerenciamento de workflows. Estes casos de teste visam a intera??o com a interface de usu?rio. Assim, neste trabalho, ? apresentada uma descri??o referente ? automa??o de workflows e ao teste destes sistemas. A partir desta descri??o, s?o determinados os requisitos para a formaliza??o de um dialeto de redes de Petri, para ent?o ser apresentada a formaliza??o do dialeto utilizado na pesquisa. Al?m disso, ? ilustrada a aplica??o desta solu??o. Devido ?s similares necessidades verificadas no teste de desempenho em rela??o ao teste de sistemas de gerenciamento de workflows, um estudo da aplica??o da solu??o desta pesquisa ao teste de desempenho ? realizado

Made available in DSpace on 2015-04-14T14:49:31Z (GMT). No. of bitstreams: 1 431695.pdf: 3670835 bytes, checksum: ab721b997ac63b711c5cd44a0727fd1a (MD5) Previous issue date: 2009-12-18 / Atualmente, o principal problema de sistemas de ajuda on-line ? que eles, geralmente, n?o se direcionam ?s necessidades espec?ficas do usu?rio. Apesar do grande avan?o dos sistemas computacionais, ainda se encontram poucas alternativas para os sistemas de ajuda. Novas abordagens se fazem necess?rias visto que as possibilidades destes sistemas de ajuda continuam sendo pouco explorados tanto por usu?rios finais quanto pelos designers. A partir de an?lises sobre novas abordagens para sistemas de ajuda e de entrevistas e sess?es de testes com usu?rio, este trabalho apresenta uma forma de organiza??o para as informa??es de ajuda de uma destas abordagens, no intuito de minimizar as dificuldades de intera??o que o usu?rio encontra.

Made available in DSpace on 2015-04-14T14:50:03Z (GMT). No. of bitstreams: 1 449591.pdf: 2292581 bytes, checksum: 94a8fc883817aa00f265338ce6b39228 (MD5) Previous issue date: 2013-04-22 / The current diversity of mobile devices with multiple functions requires that the user's attention be increasingly divided between their daily activities and notifications triggered by these devices. Whereas these notifications can generate excessive interruptions and thus be detrimental to the user's activities, it is necessary to study how to send them to reduce the annoyance of interruption of an ongoing activity, and thus diverting user attention only to the activities of their interest. Focusing on health professionals (in this case, clinicians) - who also joined the new mobile technologies at work, as a way to save time, assist in making decisions and even perform diagnostics remotely - this master s thesis aims to identify notification of these professional goals and develop a model for notifications specifically for this area (known as Mobile Health, or mHealth). In this context we developed a model for mHealth notifications based on interrupt modes as parameters Interruption, Reaction and Comprehension, and personalization of content. The model was applied in a notification system prototype and presented to user s clinicians allowing its analysis and refinement as the adequacy of the presentation settings, information types, frequency and type of proposed interruption. / A atual diversidade de dispositivos m?veis com m?ltiplas fun??es requer que a aten??o do usu?rio seja cada vez mais dividida entre suas atividades di?rias e as notifica??es disparadas nestes dispositivos. Considerando que estas notifica??es podem gerar excesso de interrup??es e, desta forma, serem at? prejudiciais ?s atividades do usu?rio, torna-se necess?rio o estudo sobre como envi?-las visando reduzir o inc?modo da interrup??o de uma atividade em andamento, e, assim desviando a aten??o do usu?rio somente para as atividades de seu interesse. Com foco nos profissionais de sa?de (neste caso espec?fico, m?dicos) - que tamb?m aderiram ?s novas tecnologias m?veis no trabalho, como uma maneira de economizar tempo, auxiliar na tomada de decis?es e, at? mesmo, realizar diagn?sticos remotamente - esta disserta??o visa identificar os objetivos de notifica??o destes profissionais e desenvolver um modelo de notifica??es especificamente para esta ?rea (conhecida como Mobile Health, ou mHealth). Neste ?mbito foi desenvolvido um modelo de notifica??es para mHealth, com base em modos de interrup??o, conforme os par?metros de Interrup??o, Rea??o e Compreens?o, e na personaliza??o de conte?do. O modelo foi aplicado em um prot?tipo de sistema de notifica??o e apresentado a usu?rios m?dicos o que permitiu sua an?lise e refinamento quanto ? adequa??o das configura??es de apresenta??o, tipos de informa??es periodicidade e tipos de interrup??es propostos.

Made available in DSpace on 2015-04-14T14:50:04Z (GMT). No. of bitstreams: 1 450555.pdf: 3122283 bytes, checksum: 9eaeb2d71061a1937700024d7aad7dfc (MD5) Previous issue date: 2013-03-25 / Despite help systems have been considered a way to help users to better understand and use applications in general, users are still resistant in using them. Aiming to promote and encourage their use, peer help systems promote aid from applications users through the formation of pairs of users that will interact to complement the assistance provided by online help system. In this context, this study aims to support the process of users search and selection to form these pairs using recommender systems and, thus, try to qualify users understanding about the environment where they are inserted. In this regard, it was proposed a selection process of pairs that use similarity index and relevant criteria mentioned by users. This process was directed to a collaborative learning environment that was chosen because it is growing and has a wide range of user profiles and tasks making it a fertile environment for the implementation of a help system. The proposed process was implemented in a prototype of a peer help system, allowing the analysis of the pair formation that was made and thus getting information about the effectiveness of its use, and therefore making it possible to analyze the potential of the use of recommendation techniques with the process of forming pairs. / Apesar de serem uma forma de ajudar os usu?rios a entenderem melhor e, por consequ?ncia, fazerem um melhor uso das aplica??es que necessitam usar, os sistemas de ajuda ainda enfrentam a resist?ncia dos usu?rios. Visando promover melhorias e incentivar seu uso, os sistemas de ajuda em pares promovem ajuda proveniente dos pr?prios usu?rios da aplica??o atrav?s da forma??o de pares de usu?rios, que ir?o interagir, de forma a complementar a ajuda oferecida pelo sistema de ajuda on-line. Neste contexto, o objetivo do presente trabalho ? apoiar, com o uso de sistemas de recomenda??o, o processo de busca e sele??o de usu?rios para a forma??o destes pares e desta forma tentar qualificar a compreens?o dos usu?rios sobre o ambiente em que est?o inseridos. Para isto foi proposto um processo de sele??o de pares utilizando ?ndices de similaridade (provenientes de algoritmos de recomenda??o) e crit?rios de escolha apontados pelos usu?rios. Este processo foi direcionado para ambientes colaborativos de ensino, os quais foram escolhidos por estarem em expans?o e possu?rem uma variada gama de perfis de usu?rios e de tarefas, o que os torna um ambiente f?rtil para a aplica??o de um sistema de ajuda. O processo proposto foi implementado em um prot?tipo de sistema de ajuda em pares, permitindo analisar a forma??o de pares feitas e, assim obter informa??es a respeito da efetividade de seu uso, sendo poss?vel com isso analisar as potencialidades do uso de t?cnicas de recomenda??o agregadas ao processo de sele??o de pares.

Made available in DSpace on 2015-04-14T14:50:22Z (GMT). No. of bitstreams: 1 391791.pdf: 4045777 bytes, checksum: 2d61a9eb645dff9b320f696d6f6799c3 (MD5) Previous issue date: 2007-01-05 / A computa??o m?vel sugere novas formas de intera??o humano-computador, provendo ambientes com informa??es peculiares do usu?rio tais como: identifica??o, atividade atual, prefer?ncias e hist?rico de atividades, onde essas informa??es s?o monitoradas, processadas e armazenadas por diferentes dispositivos e aplica??es. Neste ?mbito, a depend?ncia de contexto ? uma das formas de intera??o que tem sido cada vez mais utilizada, a fim de tornar as aplica??es percept?veis ao contexto atual do usu?rio, de acordo com sua mobilidade. Quando a intera??o do usu?rio ? enriquecida com informa??es de contexto ? poss?vel tamb?m melhorar os servi?os oferecidos aos usu?rios. Neste sentido, este trabalho discute diferentes formas de apresenta??o de informa??es de contexto em interfaces com o usu?rio, a fim de melhorar a capacidade de comunica??o entre usu?rios e computadores

Made available in DSpace on 2015-04-14T14:52:33Z (GMT). No. of bitstreams: 1 456919.pdf: 1594074 bytes, checksum: be6f174f587aa5ab3eb11944de5f19a5 (MD5) Previous issue date: 2014-03-27 / The popularization of softwares intended to mitigate the threats to Information Security ended up producing an incorrect notion that such artifacts can protect organizations from attack and overcome any threat. This mistaken notion may be caused by obtaining partial information on the subject or the lack of adequate awareness, being a human factor that can cause increased vulnerability, because induce a reckless behavior of users in relation to Information Systems. However, only the misconception regarding the perception of the threat and its severity does not justify the in Information Security breaches caused by human factors. Another important insight is the perceived exertion of performing actions that lead to responsible behavior in relation to Information Security, which added to aspects such as indifference to the rules of information security and human error can also be inducing factors of vulnerability and breaches in Information Security. In the present study we opted for the grounding in theories on Information Security through a behavioral approach to the user. The combination of the key concepts of these theories, previously validated in their research and applied to the present study approach, was used in order to understand the extent to which human perception of threat, stress, and disgruntlement control can induce responsible behavior before the Information Security and how that human behavior can generate vulnerability and potential breaches in Information Security. The results showed that there is an influence of Information Security orientation, provided by organizations in the perception and severity of the threat. Furthermore, by applying the linear regression technique, it was verified the relationship between disgruntlement and in relation to Information Security Safe Behaviour. Based on these findings contributions to the academic and practioneer knowledge were developed / A populariza??o de softwares que visam mitigar as amea?as ? Seguran?a da Informa??o acabou produzindo uma no??o exacerbada nos usu?rios a respeito da plena efic?cia desses softwares na prote??o das organiza??es e na supress?o de qualquer amea?a. Essa no??o equivocada pode ser originada pela obten??o de informa??es parciais sobre o assunto, ou pela falta da conscientiza??o adequada, e ? um fator humano que pode provocar acr?scimo de vulnerabilidade, pois ocasiona um comportamento imprudente dos usu?rios em rela??o aos Sistemas de Informa??o. Entretanto, somente o equ?voco em rela??o ? percep??o da amea?a e a sua severidade n?o explica as brechas na Seguran?a da Informa??o provocadas por fatores humanos. Outra percep??o importante ? o esfor?o percebido no cumprimento de a??es que conduzem a um comportamento respons?vel em rela??o ? Seguran?a da Informa??o, que somados aos aspectos como a indiferen?a ?s orienta??es da Seguran?a da Informa??o e o erro humano, tamb?m podem ser fatores indutores de vulnerabilidade e brechas na Seguran?a da Informa??o. Na presente pesquisa optou-se pelo embasamento em teorias que tratam da Seguran?a da Informa??o atrav?s de uma abordagem comportamental do usu?rio. A combina??o dos principais conceitos dessas teorias, previamente validados em suas respectivas pesquisas e aplic?veis ? abordagem da presente pesquisa, foi utilizada buscando compreender at? que ponto a percep??o humana sobre amea?a, esfor?o, controle e o descontentamento podem induzir a um comportamento respons?vel perante a Seguran?a da Informa??o e como esse comportamento humano pode gerar vulnerabilidade e poss?veis viola??es na Seguran?a da Informa??o. Os resultados demonstraram que h? influ?ncia da orienta??o em Seguran?a da informa??o, fornecida pelas organiza??es, na percep??o e severidade da amea?a. Al?m disso, atrav?s da aplica??o da t?cnica de regress?o linear, foi verificada a rela??o entre o descontentamento e o Comportamento Seguro em rela??o ? Seguran?a da Informa??o. Com base nesses resultados foram elaboradas contribui??es para o conhecimento acad?mico e gerencial