Mapa conceitual (MC) é uma técnica de organização e representação do conhecimento através de uma rede proposicional. Ainda que utilizado no âmbito da educação formal poucos trabalhos mencionam a importância e necessidade da capacitação na técnica para que se possa desfrutar de seus benefícios. Este estudo desenvolveu um instrumento para avaliar o nível de conhecimento de mapeadores após o processo de capacitação em MCs. A tabela de clareza proposicional, o MC semiestruturado e a aprendizagem colaborativa expandida foram três estratégias instrucionais desenvolvidas a fim de permitir que os alunos compreendessem os quatro conceitos centrais do mapeamento conceitual: proposição, questão focal, recursividade e hierarquia. Um questionário (escala Likert 5-níveis) contendo cinco afirmações foi desenvolvido, validado (? de Cronbach 0,902) e aplicado para medir a compreensão dos alunos sobre os MCs. Os questionários (n = 232) foram coletados na última aula da disciplina Ciências da Natureza, oferecida aos alunos ingressantes da Escola de Artes, Ciências e Humanidades (EACH/USP Leste) em 2009 e 2010. Quatro turmas receberam treinamento sistemático em MCs (grupo experimental) enquanto uma turma não recebeu o mesmo treinamento (grupo controle). A análise dos dados envolveu o tratamento estatístico de comparação entre médias por teste-t de Student e a estatística multivariada exploratória com métodos de reconhecimento de padrões através das análises hierárquica de agrupamentos (HCA) e de componentes principais (PCA). O resultado do teste-t confirmou que o questionário foi capaz de diferenciar alunos do grupo experimental em relação ao grupo controle. A HCA agrupou os alunos de acordo com seu nível de entendimento em mapeamento conceitual e a PCA, além de corroborar com os resultados da HCA, indicou que o entendimento da clareza semântica de proposições e da importância da pergunta focal são críticos para se tornar proficiente na técnica. / Concept Map (Cmap) is a technique to organize and represent knowledge through a propositional net. Although the fact that concept maps are used in formal education context few papers has mentioned the importance and necessity of a straight-forward training session on the technique, which allow to enjoy its benefits. This study develops an instrument to assess the level of knowledge of mappers after the straight-forward training session. The propositional clarity table, the half structured Cmap and the expanded collaborative learning were the three strategies responsible to guarantee the understanding of four central concepts in conceptual mapping: proposition, focal question, recursivity revision and hierarchy. Five statements\' questionnaire (five-level Likert\'s scale) was developed, validated (Cronbach\'s alpha 0.902) and tested to assess the students\' understanding about Cmaps. Those questionnaires (n = 232) was collected on the last class of Natural Science course offered to first year\'s students of the Escola de Artes, Ciências e Humanidades (School of Arts, Science and Humanities - University of São Paulo) in 2009 and 2010. Four classes was systematic trained (experimental group) and one class does not received the same training (control group). The data analysis involved the statistical treatment to comparison between the means by Student\'s t-test and non-supervised exploratory multivariate analysis for pattern recognition by Hierarchical Cluster Analysis (HCA) and Principal Component Analysis (PCA). The results of t-test confirmed the questionnaire capability to distinguish the students of experimental from control group. HCA clustered the students according to their knowlodge level in concept mapping. PCA not only agree with the HCA results but also demonstrated that the understanding of propositional clarity semantic and the importance of focal question are critical to students that desire to be proficiencies in Cmaps.

O Sistema Multidimensional de Categorização de Comportamentos na Interação Terapêutica (SiMCCIT) desenvolvido por Zamignani e Meyer em 2007 pretende descrever o que ocorre em sessões de psicoterapias por meio de categorias de comportamentos de terapeutas e clientes. A pergunta que o presente estudo pretendeu responder é se o eixo correspondente ao comportamento verbal vocal desse sistema é capaz de identificar diferenças entre terapias bem e mal sucedidas quando aplicado às quartas sessões. A avaliação das terapias foi feita com um critério misto definido por: a) os resultados do Inventário de Aliança Terapêutica (WAI), b) presença de comportamentos de melhoras e de análise e c) relato de outras mudanças de comportamentos do cliente. De um total de 25 terapias com as quatro primeiras sessões gravadas em áudio, seis foram consideradas bem sucedidas, seis mal sucedidas e 13 foram consideradas terapias com resultados intermediários. Foi realizada a categorização da quarta sessão das terapias bem sucedidas e das terapias mal sucedidas. Os dados sugerem a existência de algumas diferenças entre as sessões das terapias bem e mal sucedidas, embora não significativas estatisticamente. Nas sessões das terapias bem sucedidas observou-se que: a categoria Solicitação de Relato tendeu a ser um pouco mais frequente em todos os casos; a categoria Solicitação apresentou uma porcentagem discretamente maior e ocorreu uma correlação positiva entre facilitação e empatia. Nas sessões das terapias mal sucedidas constatou-se que: a categoria relato ou foi menos frequente ou mais frequente que nas sessões das Terapias Bem Sucedidas; quanto mais os clientes relatavam mais os terapeutas facilitavam seus relatos e que quanto mais os terapeutas solicitavam reflexões, mais metas os clientes se propunham a realizar. Como as diferenças da categorização não foram estatisticamente significativas em casos julgados diferentes concluiu-se que o eixo de comportamento verbal vocal do SiMCCIT diferenciou pouco as terapias bem e mal sucedidas. Algumas variáveis dificultaram a observação da capacidade do sistema de diferenciar as sessões das terapias bem e mal sucedidas: o número reduzido da amostra e o uso de apenas um dos eixos do sistema. Discutiu-se assim a necessidade de ampliar a amostra e utilizar outros eixos do sistema, como o de temas / The Multidimensional System for coding Behaviors in Therapist-Client Interaction (SiMCCIT), developed by Zamignani and Meyer, intend to describe what happens in psychotherapy sessions using behavioral categories of therapists and clients. The question that this study intended to answer was if this system is able to identify differences between successful and unsuccessful therapies. The assessment of therapy success was made with a mixed criterion defined by: (a) the results of the Working Alliance Inventory (WAI); (b) presence of improved behavior and analysis and (c) report of other changes in client behavior. In the total of 25 therapies with the first four sessions audio recorded, six were considered successful, six unsuccessful and 13 intermediate. The fourth sessions of successful and unsuccessful therapies were categorized. The data suggest some differences between the successful and unsuccessful therapy sessions, although not statistically significant. In the successful therapy sessions it was noted that: the category Request Report tended to be slightly more frequent in all sessions, the category Request showed a slightly higher percentage, and there was a positive correlation between Facilitation and Empathy. In the sessions of unsuccessful therapies it was found that: clients reported more or less than in successful therapies, the more clients reported more therapists facilitated their reports and that the more therapist asked reflections, the more goals clients proposed to undertake. Because the differences in categorization were not statistically significant in cases considered different it was concluded that the axis of vocal verbal behavior of SiMCCIT did not differentiate the successful from unsuccessful therapies. Some variables hampered the ability of the system to differentiate between sessions of successful and unsuccessful therapies: the reduced number of the sample and the use of only one of the axes of the system. It was discussed the need to expand the sample and use other axes of the system, such as themes

Research studies indicate that, by determining the physiological load placed on athletes during competitions, it can aid in the development of strength and conditioning programmes, according to the specific demands placed on athletes (Deutch et al., 1998; Kay&Gill, 2004). Physiological data, specifically on rugby union players, are furthermore limited and more information is needed (Banfi et al., 2006; Deutch et al., 2007). The aim of the study was to investigate the physiological demands of South African male U/21 club rugby players and to establish the correlation between physiological demands experienced during rugby games and practice sessions. Scientific methods to describe physiological demands in sport that are used are heart-rates and blood-lactate measurements (Eniseler, 2005). A group of U/21 rugby players (n=15) of the University of Pretoria (Tuks) rugby club participated in this study. Components that were tested included blood-lactate concentrations and heart-rates during rugby match and practice sessions. The data of the Tuks U/21 team was statistically analysed with descriptive statistics (means and standard deviations). Significant differences between match and practice sessions, at a p-value of P < 0.05, were determined by a dependent t-test. An independent t-test was used to determine significant differences between the forward and backs group (Thomas&Nelson, 2005). The results showed that statistically significant differences (p<0.05) were found between mean heart-rate in the rugby match (154.40 ±13.53) and practice sessions (138.33±4.81). No significant differences were found between peak lactate measurements in the match (5.39 ±2.44) and practice sessions (4.93±1.83). Between the forward and backs group no statistical significance could be found for average heart-rate and blood-lactate levels in practice sessions and the match. The findings of the present study indicate that rugby union matches for club level U/21 players are an intermittent type of activity, with both the use of aerobic and anaerobic energy systems. Additional research on more amateur rugby clubs is needed to extend the knowledge of club level coaches. / Dissertation (MA)--University of Pretoria, 2012. / Biokinetics, Sport and Leisure Sciences / unrestricted

Students’ interactions can be an influential component of students’ success in an interactive learning environment. From a participation perspective, learning is viewed in terms of how students transform their participation. However, many of the seminal papers discussing the participationist framework are vague on specific details about what student participation really looks like on a fine-grained scale. As part of a large project to understand the role of student participation in learning, this study gathered data that quantified students’ participation in three broad areas of two student-centered introductory calculus-based physics classes structured around the Investigative Science Learning Environment (ISLE) philosophy. These three broad areas of classes were in-class learning activities, class review sessions that happened at the beginning of every class, and the informal learning community that formed outside of class time. Using video data, classroom observations, and students’ self-reported social network data, this study quantified students’ participation in these three aspects of the class throughout two semesters. The relationship between behaviors of students’ engagement in various settings of an active learning environment and (a) their conceptual understanding (measured by FCI gain) and (b) academic success in the courses as measured by exam scores and scores on out-of-class assignments were investigated. The results from the analysis of the student interaction in the learning process show that three class components, viz. the Review Session, Learning Activities, and Informal Learning Community, play distinct roles in learning. Students who come in the class with better content knowledge do not necessarily participate more in the learning activities of active learning classrooms. Learning Communities serve as a “support network” for students to finish assignments and help students to pass the course. Group discussions, which are facilitated by students themselves, better help students in gaining conceptual understanding. Since patterns of students’ participation do not change significantly over time, instructors should try to ensure greater participation by incorporating different learning activities in the active learning classroom.

Este trabalho propõe políticas para servidores Web baseados em sessões, visando ao oferecimento de garantias de qualidade de serviço (Quality of Service - QoS) a seus usuários. Para o fornecimento de QoS, dois tipos de políticas são consideradas: as responsáveis pela diferenciação de serviços e as responsáveis pelo controle de admissão. Alguns algoritmos de escalonamento foram desenvolvidos com o objetivo de oferecer melhores serviços para as sessões prioritárias: o algoritmo de escalonamento baseado em sessão (SBSA) e o algoritmo de escalonamento baseado em sessão com diferenciação de serviços (SBSA-DS). Quanto ao controle de admissão, foram consideradas duas novas políticas, as quais utilizam diferentes parâmetros para a tomada de decisão e têm como objetivo garantir a finalização do maior número de sessões prioritárias. A partir dos resultados obtidos nos experimentos realizados por meio de simulação, constatou-se que o emprego dos algoritmos e das políticas desenvolvidos melhora o atendimento das sessões para as quais deve ser oferecido um serviço preferencial. Portanto, em servidores Web preocupados com a garantia de QoS para seus usuários, os quais interagem com o sistema por meio de sessões, o uso dessas novas técnicas se mostra adequado / This work considers policies for Web servers based on sessions, aiming at the guarantees of Quality of Service (QoS) to the systems users. Two types of policies are considered: the responsible for the differentiation of services and the responsible for the admission control. Some scheduling algorithms had been developed to offer better services for the priority sessions: the Session Based Scheduling Algorithm (SBSA) and the Session Based Scheduling Algorithm with Differentiation of Services (SBSA-DS). In relation to the admission control, two new policies had been considered, which use different parameters to help the decisions and have as objective guarantee the finalization of as many priority sessions as possible. From the obtained results of the experiments realized by mean of simulation, it is evidenced that the use of the developed algorithms and policies improves the attendance of the sessions that deserve preferential service. Therefore, in Web servers worried in the guarantee the QoS for their users, which interact with the system by sessions, the use of these new techniques reveals adequate

This Master’s thesis deals with IMS architecture problems. This thesis describes its creation and progress, also structure of this architecture is mentioned. Text of this thesis describes function of the most important parts of the architecture, such as Proxy-CSCF, Interrogating-CSCF, Serving-CSCF and HSS. IMS architecture uses SIP protocol for establishment, maintenance and closing session and Diameter protocol for network management functions. That is why this thesis also describes characteristics of these two protocols. Next part of the thesis is focused on Open-source platform Open IMS Core and its installation. Open IMS Core platform was developed for testing IMS technologies within an internal project at the Fraunhofer Institute FOKUS in Berlin. Nowadays it is used by major part of vendors and providers for testing their products and services. As a main theme of this thesis, there was made a simple network, which consists of three users. This network is established on fundamentals of IMS and it was made in Open IMS Core. So in one chapter is outlined a process of its creation. There is described a process of adding a user list to database server HSS. In the next part there are mentioned some information about setup of virtual IMS terminal. Eventually there are shown some possibilities of how to catch traffic in the network. In this chapter there are also state diagrams, which describe a process of registration of IMS terminal and also a process of establishment, maintenance and closing session.

Modern technologies are growing and Voice over Internet Protocol (VoIP) technology is able to function in heterogeneous networks. VoIP gained wide popularity because it offers cheap calling rates compared to traditional telephone system and the number of VoIP subscribers has increased significantly in recent years. End users need reliable and acceptable call quality in real time communication with best Quality of Service (QoS). Server complexity is increasing to handle all client requests simultaneously and needs huge processing power. VoIP Servers will increase processing power but the engineering tradeoff needs to be considered e.g. increasing hardware will increase hardware complexity, energy consumption, network management, space requirement and overall system complexity. Modern System-on-Chip (SoC) uses multiple core technology to resolve the complexity of hardware computation. With enterprises needing to reduce overall costs while simultaneously improving call setup time, the amalgamation of VoIP with SoC can play a major role in the business market. The proposed VoIP Server model with multiple processing capabilities embedded in it is tailored for multicore hardware to achieve the required result. The model uses SystemC-2.2.0 and TLM-2.0 as a platform and consists of three main modules. TLM is built on top of SystemC in an overlay architectural fashion. SystemC provides a bridge between software and hardware co-design and increases HW &amp; SW productivity, driven by fast concurrent programming in real time. The proposed multicore VoIP Server model implements a round robin algorithm to distribute transactions between cores and clients via Load Balancer. Primary focus of the multicore model is the processing of call setup time delays on a VoIP Server. Experiments were performed using OpenSIP Server to measure Session Initiation Protocol (SIP) messages and call setup time processing delays. Simulations were performed at the KTH Ferlin system and based on the theoretical measurements from the OpenSIP Server experiments. Results of the proposed multicore VoIP Server model shows improvement in the processing of call setup time delays.

Introduction: Monitoring football players training load is important, lack of recovery and high training load can result in injury or illness.Aim: Describe internal training load, acute chronic workload ratio (ACWR) and wellness of female elite football players. Investigate the relationship between daily training load and wellness.  Method: Seventeen players estimated session ratings of perceived exertion (sRPE) after each football session and muscle soreness, sleep quality and mental stress before every session during twelve weeks of pre-season training. Internal training load and ACWR were calculat- ed using sRPE multiplied by training minutes.  Results: Weekly training load for outfield players was 1697,22±632,07AU, for goalkeepers 1570,69±580,50AU. Outfield players total wellness score was 23,58±2,62, goalkeepers score was 21,2±3,35. ACWR was between 0,31-1,30 for outfield players, 0,36-1,35 for goalkeep- ers. Week correlations were seen between internal training load and muscle soreness (r=- 0,24, p&lt;0,001) and mental stress (r=-0,18, p&lt;0,001) in outfield players.  Conclusion: The study describes internal training load, ACWR and wellness of a female elite football team. Large variations were seen weekly training load, which could be an increased risk of injury. ACWR can be a guide when planning training load. Internal training load doesn't seem to have a big impact on the players wellbeing. / Bakgrund: Monitorering av fotbollsspelares träningsbelastning har en betydande roll då bris- tande återhämtning och hög träningsbelastning kan resultera i skada, sjukdom eller överträ- ningssyndrom.Syfte: Kartlägga intern träningsbelastning, acute chronic workload ratio (ACWR) och well- ness hos kvinnliga elitfotbollsspelare. Undersöka samband mellan daglig träningsbelastning och wellness.  Metod: Sjutton spelare från ett lag skattade ratings of percived exertion efter varje tränings- pass (sRPE) samt sleep quality, mental stress och muscle soreness inför varje träning under tolv veckors försäsongsträning. Intern träningsbelastning och ACWR beräknades genom att multiplicera sRPE med träningstid. Data analyserades separat för fjorton utespelare och tre målvakter.  Resultat: Veckovis träningsbelastning 1697,22 (±632,07)AU för utespelare, 1570,69 (±580,50)AU för målvakter. Total wellness score var 23,58±2,62 för utespelare, 21,2±3,35 för målvakter. ACWR låg mellan 0,31-1,30 för utespelare och 0,36-1,35 för målvakter. Svaga samband sågs mellan intern träningsbelastning och muscle soreness (r=-0,24, p&lt;0,001) samt mental stress hos utespelarna (r=-0,18, p&lt;0,001). Inga signifikanta samband sågs vid bräk- ningar av målvakternas data.  Slutsats: Studien beskriver intern träningsbelastning, ACWR och wellness hos ett kvinnligt elitfotbollslag. Stora variationer sågs i träningsbelastning mellan veckorna vilket kan utgöra ökad risk för skada. ACWR kan vara till stöd i planering av träning och återhämtning. Intern träningsbelastning verkar inte ha någon större påverkan på spelarnas välmående.

In this dissertation, new approaches that utilize the one-way cryptographic hash functions in designing improved network security protocols are investigated. The proposed approaches are designed to be scalable and easy to implement in modern technology. The first contribution explores session cookies with emphasis on the threat of session hijacking attacks resulting from session cookie theft or sniffing. In the proposed scheme, these cookies are replaced by easily computed authentication credentials using Lamport's well-known one-time passwords. The basic idea in this scheme revolves around utilizing sparse caching units, where authentication credentials pertaining to cookies are stored and fetched once needed, thereby, mitigating computational overhead generally associated with one-way hash constructions. The second and third proposed schemes rely on dividing the one-way hash construction into a hierarchical two-tier construction. Each tier component is responsible for some aspect of authentication generated by using two different hash functions. By utilizing different cryptographic hash functions arranged in two tiers, the hierarchical two-tier protocol (our second contribution) gives significant performance improvement over previously proposed solutions for securing Internet cookies. Through indexing authentication credentials by their position within the hash chain in a multi-dimensional chain, the third contribution achieves improved performance. In the fourth proposed scheme, an attempt is made to apply the one-way hash construction to achieve user and broadcast authentication in wireless sensor networks. Due to known energy and memory constraints, the one-way hash scheme is modified to mitigate computational overhead so it can be easily applied in this particular setting. The fifth scheme tries to reap the benefits of the sparse cache-supported scheme and the hierarchical scheme. The resulting hybrid approach achieves efficient performance at the lowest cost of caching possible. In the sixth proposal, an authentication scheme tailored for the multi-server single sign-on (SSO) environment is presented. The scheme utilizes the one-way hash construction in a Merkle Hash Tree and a hash calendar to avoid impersonation and session hijacking attacks. The scheme also explores the optimal configuration of the one-way hash chain in this particular environment. All the proposed protocols are validated by extensive experimental analyses. These analyses are obtained by running simulations depicting the many scenarios envisioned. Additionally, these simulations are supported by relevant analytical models derived by mathematical formulas taking into consideration the environment under investigation.

Studien syftar till att besvara frågeställningarna: Hur och varför används läxor i matematikundervisningen på det sätt som det görs idag? Hur uppfattar svenska lärare internationell forskning kring läxor i matematikämnet? Detta görs genom en kvalitativ forskningsmetod där verksamma matematiklärare i årskurserna 4-6 intervjuats gällande deras uppfattningar och erfarenheter kring läxor i matematik och internationell forskning. Resultatet är tolkat utifrån den fenomenologiska tolkningsprocessen och analyserat med hjälp av en tematisk analysmetod. Resultatet av studien visar att väldigt få läxor används i svenska skolan, där mängdträning är det som står i fokus. Detta för att det anses att läxor ska användas för att befästa befintlig kunskap och inte skapa ny kunskap. Lärarna visade delade åsikter gällande den internationella forskning som presenterades under intervjuerna. Den internationella forskningen som presenterades tog upp problematiken gällande läxläsning i olika länder och en forskning skapade en lösning på problematiken. Majoriteten av de svenska lärarna tyckte att lösningen som forskning föreslog lät bra i teorin men fann flera problematiska punkter för att det skulle kunna appliceras i praktiken. De punkter de svenska lärarna tar upp blir en fråga för skolorganisationen och blir därför grunden i den forskning som behöver göras inom forskningsområdet.