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Ensino-aprendizagem em endodontia: aplicação da hipermídia e o uso da internet como facilitadores do processo; Teaching and learning in Endodontics: application of hypermedia and use of internet as facilitators of the process

Lemos, Érico de Mello
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/07/2010 PT
Relevância na Pesquisa
55.59%
No modelo tradicional de ensino, desenvolver os aspectos cognitivos, psicomotores e comportamentais inerentes ao diagnóstico e plano de tratamento em Endodontia, tornam-se um problema, devido ao número relativamente limitado de experiências clínicas vivenciadas pelos alunos na formulação do diagnóstico, bem como a disponibilidade do professor compatível ao número de alunos na clínica endodôntica e o número cada vez mais insuficiente de pacientes para atender a demanda. Neste sentido, o desenvolvimento de estratégias de ensino-aprendizagem eficientes e de avaliação das competências relacionadas ao diagnóstico, seria interessante para a educação em Endodontia. O objetivo deste trabalho foi verificar e comparar o desempenho de alunos de Endodontia, tendo como fonte de variação para a metodologia educacional, a utilização da tecnologia hipermídia e o uso da internet como facilitadores do processo de ensino-aprendizagem. Para isso, graduandos do terceiro ano de Odontologia de três Universidades foram divididos em três grupos, de acordo com a metodologia de ensino-aprendizagem utilizada: GI método tradicional centrado no professor - grupo controle (n = 23); GII método tradicional acrescendo uma revisão centrada no professor...

Autonomous robot systems and competitions : proceedings of the 12th International Conference

Bicho, E., ed. lit.; Ribeiro, Fernando, ed. lit.; Louro, Luis, ed. lit.; International Conference on Autonomous Robot Systems and Competitions, 12, Guimarães, 2012; Robotica’2012
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Conferência ou Objeto de Conferência
Publicado em 11/04/2012 ENG
Relevância na Pesquisa
55.4%
This is the 2012’s edition of the scientific meeting of the Portuguese Robotics Open (ROBOTICA’ 2012). It aims to disseminate scientific contributions and to promote discussion of theories, methods and experiences in areas of relevance to Autonomous Robotics and Robotic Competitions. All accepted contributions are included in this proceedings book. The conference program has also included an invited talk by Dr.ir. Raymond H. Cuijpers, from the Department of Human Technology Interaction of Eindhoven University of Technology, Netherlands.; The conference is kindly sponsored by the IEEE Portugal Section / IEEE RAS Chapter; SPR-Sociedade Portuguesa de Robótica

PBL methodologies in simulated environments in vocational higher education: professional competences and learning processes

Pinheiro, Margarida Maria Solteiro Martins
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
55.59%
This study reports a case study experience of a PBL (either as project-based learning or problem-based learning) methodology in simulated environments in vocational higher education. PBL was introduced to produce adaptable graduates whose professional competences are well attuned to the demands of a rapidly changing world. As main aspects of this development, we highlight the change from a teaching to a learning paradigm, the attention given to the social context of learning, the promotion of simulated environments of relevant real situations, the active responsibility of students for their own knowledge, and the global and interdisciplinary character of this knowledge. Given this outline, the empirical study assumes as its object the course of Projecto Profissional (Professional Project) in ISCA-UA (Higher Institute of Accounting and Administration of the University of Aveiro). It looks like that PBL-type methodologies in simulated environments add more value, essentially, at the beginning of the graduate’s professional career, but there were concerns about what it seems to be a gap between employers and other stakeholders regarding, especially, social, personal and learning competences. A key impediment to such engagement was the differences in perception of the type of competences truly valued by employers. We also found a difference in behavior between academics that do and do not have professional experience outside academia. Furthermore...

Accuracy and learning curves of inexperienced observers for manual segmentation of electromyograms

Ferreira,Arthur de Sá; Guimarães,Fernando Silva; Magalhães,Manuel Armando Ribeiro; Silva,Regina Coeli Souza e
Fonte: Pontifícia Universidade Católica do Paraná Publicador: Pontifícia Universidade Católica do Paraná
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2013 EN
Relevância na Pesquisa
55.56%
INTRODUCTION: The shape-varying format of surface electromyograms introduces errors in the detection of contraction events. OBJECTIVE: To investigate the accuracy and learning curves of inexperienced observers to detect the quantity of contraction events in surface electromyograms. MATERIALS AND METHODS: Six observers performed manual segmentation in 1200 shape-varying waveforms simulated using a phenomenological model with variable events, smooth changes in amplitude, marked on-off timing, and variable signal-to-noise ratio (0-39 dB). Segmentation was organized in four sessions with 15 blocks of 20 signals each. Accuracy and learning curves were modeled per block by linear and power regression models and tested for difference among sessions. Cut-off values of signal-to-noise ratio for optimal manual segmentation were also estimated. RESULTS: The accuracy curve showed no significant linear trend throughout blocks and no difference among sessions 1-2-3-4 (87% [85; 89], 87% [85; 89], 87% [85; 89], 87% [81; 88]; p = 0.691). Accuracy was low for detection of 1 event (AUC = 0.40; sensitivity = 44%; specificity = 43%; cut-off = 12.9 dB) but was high and affected by the signal-to-noise ratio for detection of two events (AUC = 0.82; sensitivity = 77%; specificity = 76%; cut-off = 7.0 dB). The learning curve showed a significant power regression (p < 0.001) with decreasing values of learning percentages (time duration to complete the task) among sessions 1-2-3-4 (86.5% [68; 94]...

Simulation-based learning: Just like the real thing

Lateef, Fatimah
Fonte: Medknow Publications Publicador: Medknow Publications
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
Relevância na Pesquisa
45.78%
Simulation is a technique for practice and learning that can be applied to many different disciplines and trainees. It is a technique (not a technology) to replace and amplify real experiences with guided ones, often “immersive” in nature, that evoke or replicate substantial aspects of the real world in a fully interactive fashion. Simulation-based learning can be the way to develop health professionals’ knowledge, skills, and attitudes, whilst protecting patients from unnecessary risks. Simulation-based medical education can be a platform which provides a valuable tool in learning to mitigate ethical tensions and resolve practical dilemmas. Simulation-based training techniques, tools, and strategies can be applied in designing structured learning experiences, as well as be used as a measurement tool linked to targeted teamwork competencies and learning objectives. It has been widely applied in fields such aviation and the military. In medicine, simulation offers good scope for training of interdisciplinary medical teams. The realistic scenarios and equipment allows for retraining and practice till one can master the procedure or skill. An increasing number of health care institutions and medical schools are now turning to simulation-based learning. Teamwork training conducted in the simulated environment may offer an additive benefit to the traditional didactic instruction...

Assessment of Human Patient Simulation-Based Learning

Bray, Brenda S.; Schwartz, Catrina R.; Odegard, Peggy Soule; Hammer, Dana P.; Seybert, Amy L.
Fonte: American Journal of Pharmaceutical Education Publicador: American Journal of Pharmaceutical Education
Tipo: Artigo de Revista Científica
Publicado em 15/12/2011 EN
Relevância na Pesquisa
55.73%
The most common types of assessment of human patient simulation are satisfaction and/or confidence surveys or tests of knowledge acquisition. There is an urgent need to develop valid, reliable assessment instruments related to simulation-based learning. Assessment practices for simulation-based activities in the pharmacy curricula are highlighted, with a focus on human patient simulation. Examples of simulation-based assessment activities are reviewed according to type of assessment or domain being assessed. Assessment strategies are suggested for faculty members and programs that use simulation-based learning.

Experiential learning environments for structural behavior

Viteri, Victor R. (Victor Raul)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 184 leaves; 16427226 bytes; 16427030 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
55.55%
Computers have dramatically changed the nature of structural engineering practice by shifting work from process-oriented tasks, such as performing hand calculations and drafting, to structural modeling and interpretation of computer results. To perform these new functions, engineers need to have a deep understanding of structural behavior. There exists, however, a strong sentiment that engineering education has not been able to effectively address these new needs. Through the Experiential Learning Cycle, this research identifies structural behavior as knowledge associated with conceptual understanding that is most effectively attained through reflective action. Within this context, an epistemological analysis reveals that the use of computer applications that integrate simulation and assessment capabilities would enhance the traditional framework of structural engineering education. The Tutorial Cycle provides the pedagogical foundation for the development of a methodology that leads to the creation of such environments. The principles proposed by this methodology were implemented in the building of an Experiential Learning Environment whose primary objective is to help develop a qualitative understanding for the structural behavior of beams. In order to address conceptual and developmental issues...

MIT integrated microelectronics device experimentation and simulation iLab; Massachusetts Institute of Technology integrated microelectronics device experimentation and simulation iLab

Cukalovic, Boris
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 58 p.
ENG
Relevância na Pesquisa
55.55%
We developed the MIT Integrated Microelectronics Device Experimentation and Simulation iLab, a new online laboratory that combines and significantly upgrades the capabilities of two existing online microelectronics labs: WebLab, a device characterization lab, and WebLabSim, a device simulation lab. The new integrated tool allows users to simultaneously run experiments on actual devices and simulations on the virtual ones, as well as to compare the results of the two. In order to achieve this, we considerably extended the capabilities of the original clients. We added the ability to graph the results of multiple experiments and simulations simultaneously, on top of each other, which allows for much easier comparison. We also added the ability to load, view and graph the results of experiments and simulations that were ran at any point in the past, even when the corresponding lab configurations are no longer available. Our hope is that this new integrated iLab will enrich microelectronics teaching and learning by allowing students to compare real life device behavior with theoretical expectations.; by Boris Cukalovic.; Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.; Includes bibliographical references (p. 57-58).

A simulation-based resource optimization and time reduction model using design structure matrix

Zhang, Yifeng, S.M. Massachusetts Institute of Technology
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 95 p.
ENG
Relevância na Pesquisa
55.55%
Project scheduling is an important research and application area in engineering management. Recent research in this area addresses resource constraints as well as stochastic durations. This thesis presents a simulation-based optimization model for solving resource-constrained product development project scheduling problems. The model uses design structure matrix (DSM) to represent the information exchange among various tasks of a project. Instead of a simple binary precedence relationship, DSM is able to quantify the extent of interactions as well. In particular, these interactions are characterized by rework probabilities, rework impacts and learning. As a result, modeling based on DSM allows iterations to take place. This stochastic characteristic is not well addressed in earlier literatures of project scheduling problems. Adding resource factors to DSM simulation is a relatively new topic. We not only model the constraints posed by resource requirements, but also explore the effect of allocating different amount of resources on iterations. Genetic algorithm (GA) is chosen to optimize the model over a weighted sum of a set of heuristics. GA is known for its robustness in solving many types of problems. While the normal branch-and-bound method depends on problem specific information to generate tight bounds...

L’impact d’une simulation sur des dispositifs mobiles et en situation de collaboration sur la compréhension de l’effet photoélectrique au niveau collégial

Droui, Mohamed
Fonte: Université de Montréal Publicador: Université de Montréal
Tipo: Thèse ou Mémoire numérique / Electronic Thesis or Dissertation
FR
Relevância na Pesquisa
45.84%
L’innovation pédagogique pour elle-même s’avère parfois discutable, mais elle se justifie quand les enseignants se heurtent aux difficultés d’apprentissage de leurs étudiants. En particulier, certaines notions de physique sont réputées difficiles à appréhender par les étudiants, comme c’est le cas pour l’effet photoélectrique qui n’est pas souvent compris par les étudiants au niveau collégial. Cette recherche tente de déterminer si, dans le cadre d’un cours de physique, la simulation de l’effet photoélectrique et l’utilisation des dispositifs mobiles et en situation de collaboration favorisent une évolution des conceptions des étudiants au sujet de la lumière. Nous avons ainsi procédé à l’élaboration d’un scénario d’apprentissage collaboratif intégrant une simulation de l’effet photoélectrique sur un ordinateur de poche. La conception du scénario a d’abord été influencée par notre vision socioconstructiviste de l’apprentissage. Nous avons effectué deux études préliminaires afin de compléter notre scénario d’apprentissage et valider la plateforme MobileSim et l’interface du simulateur, que nous avons utilisées dans notre expérimentation : la première avec des ordinateurs de bureau et la seconde avec des ordinateurs de poche. Nous avons fait suivre à deux groupes d’étudiants deux cours différents...

Virtual classroom simulation: design and trial in a preservice teacher education program.

Skrodal, Simon
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2010
Relevância na Pesquisa
45.81%
“The Virtual Classroom Simulation, Design and Trial in a Preservice Teacher Education Program” (VCS), is trans-disciplinary research study that aimed to design, embed, trial and evaluate a simulation system and its learning outcomes. This document encapsulates the motivation, conceptualisation, theory, development, trials and evaluation behind the study. Expert technology transfer, particularly from areas in education, psychology, social sciences, conceptual modelling, computer science and underlying mixed methods research design, has been instrumental in underpinning the research and development of the VCS. Prospective education students have preconceived ideas, or mental models, about teaching and learning that are often based on their own experiences as students. The School of Education at the University of Adelaide offers a number of courses that provide insights into both the theory and practice of education. The practicum component provides a valuable, real-life, experience that may improve education students’ understanding about teaching, learning and classroom interactions. It may also enable them to better understand and apply effective teaching strategies to enhance student learning outcome. Some research studies, however...

Entwicklung einer interaktiven und multimedialen Lernsoftware zu fallbasierten cholestatischen Erkrankungen der Leber, der Gallenwege und des Pankreas; Development of an interactive and multimedial learning-software of problem-based cholestatic liver, bile duct and pancreatic diseases

Ruess, Steffen
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
45.77%
Dok. 1: Textteil Dok. 2: Fallbilder Dok. 3: Einfuehrungstexte - Symptome - Differentialdiagnosen Dok. 4: Untersuchungsergebnisse Dok. 5: Bilanz - Prologe - Medien Dok. 6: Assistent Dok. 7: Synonyme Wortliste Dok. 8: Setup-Paket Lernprogramm ************************************************* Die Vermittlung der Lehrinhalte in der mediz. Ausbildung befindet sich in der Diskussion. Problemorientiertes Lernen war eine Antwort auf die Forderung nach einer Neuordnung. Der Unterricht am Krankenbett wurde betont, steht jedoch begrenzten Ressourcen gegenüber. Die multimediale Computertechnologie hat sich etabliert, ist dialogfähig und erscheint als ökonomische und flexible Alternative, die kognitiven Lernziele des POL abseits der Hochschule vermitteln zu können. Interaktive Computerprogramme haben der medizinischen Lehre Einzug gehalten, sie sind aber häufig didaktisch intuitiv gestaltet und können auf Grund schematisierender Einschränkungen keine authentische Lernsituation nachbilden. Ausgehend vom Lehrgespräch am Krankenbett war es Thema dieser Arbeit, diese Unterrichtsform zu analysieren und unter aktuellen mediendidaktischen Gesichtspunkten in ein Computerlernprogramm zu integrieren. Die technischen Möglichkeiten einer Simulation wurden dahingehend beleuchtet...

SimTeacher: Simulation-based learning in teacher education

Fischler, Robert B.
Fonte: [Bloomington, Ind.] : Indiana University Publicador: [Bloomington, Ind.] : Indiana University
Tipo: Doctoral Dissertation
EN
Relevância na Pesquisa
65.82%
Thesis (PhD) - Indiana University, School of Education, 2006; The use of educational simulations may help bridge the divide between contemporary learning theories and traditional practices of instruction. The research literature suggests that successful simulation-based learning largely depends on the instructional design principles behind the simulations. How instructors effectively use well-designed simulations with students, however, is less clear. An original simulation for teacher education (SimTeacher) was created based on contemporary learning theories. Three instructors at a major southwestern university used the simulation in their teacher education courses within a span of four semesters. Qualitative data was collected through interviews and observation. Instructors decided on their extent of involvement based on their teaching style, objectives, technology skills, and available time. The study provides a detailed look at the issues, concerns, failures, and triumphs of instructors using SimTeacher in their courses. In addition, a unique perspective was provided from student feedback after simulation use. The study results suggest that adding an advanced technological tool like an educational simulation will have little effect on learning unless it is integrated well into the curriculum. Specifically...

O ensino da avaliação clínica da oxigenação e circulação do bebê pré-termo: integração simulação virtual e simulação robótica; Teaching of clinical evaluation of oxygenation and circulation in preterm infants: integration between virtual and robotic simulation

Dias, Danielle Monteiro Vilela
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 29/06/2015 PT
Relevância na Pesquisa
45.81%
Na era digital, o processo ensino-aprendizagem em saúde e enfermagem tem se beneficiado da tecnologia da informação e da técnica da simulação realística e inovadora. Sendo assim, o desenvolvimento e uso de tecnologias educacionais pode contribuir com um ensino mais participativo, disponibilizando para os alunos conteúdos e simulações que poderão ser utilizados de acordo com a necessidade e ritmo de aprendizagem. Este estudo tem por objetivos construir e avaliar o cenário de simulação robótica junto a especialistas; descrever o processo de desenvolvimento do Curso de Difusão semipresencial Avaliação clínica da oxigenação e circulação do bebê pré-termo e avaliar o desempenho de aprendizagem cognitiva dos estudantes no curso semipresencial sobre a avaliação clínica da oxigenação e circulação do bebê pré-termo. Estudo de intervenção, quase experimental, com pré e pós-teste, sendo o grupo controle dele mesmo. Utilizamos como referencial teórico a aprendizagem significativa, para o desenvolvimento do cenário optamos pelo método proposto por Jeffries (2007), e para o planejamento e desenvolvimento do Curso de Difusão no Ambiente Virtual de Aprendizagem (AVA) utilizamos o modelo de Seixas (2012). Foram convidados a participar da intervenção educacional...

Estudio de los diferentes modelos didácticos en educación y propuesta de una secuencia didáctica para primaria basada en metodologías activas; A study of different teaching models in education and a proposal of a learning unit for primary based on active methodologies

Díaz Durán, Carla
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Trabalho de Conclusão de Curso
SPA
Relevância na Pesquisa
55.67%
RESUMEN Partimos de la necesidad de adaptar el modelo didáctico de cada docente a las características de la sociedad actual, una sociedad democrática, tecnológica y competitiva, entendiendo que el modelo constructivista es el que permite dicha adaptación. El objetivo de este trabajo es plasmar, teórica y prácticamente, un modelo didáctico propicio para garantizar el aprendizaje de los alumnos. Para ello, inicialmente se elabora una descripción de los diferentes modelos didácticos empleados en las diversas etapas educativas; tratando aspectos tales como las tipologías bajo los que se agrupan dichos modelos, las opiniones de docentes y alumnos ante unos y otros modelos, la posibilidad de cambio de modelo didáctico por parte de los docentes, etc. Ante la pregunta de cómo enseñar bajo el modelo constructivista, la respuesta se concreta en el empleo de metodologías activas. Teniendo en cuenta esta idea, se plantea una propuesta de actividades para la etapa de Educación Primaria que refleje un modelo didáctico constructivista, puesto en práctica a través de metodologías activas; empleando los siguientes métodos: Aprendizaje basado en problemas, aprendizaje cooperativo y simulación y juego. Además, este trabajo ofrece al maestro que decida llevar a cabo la secuencia didáctica propuesta...

Construction and constructivism: learning contract management and administration via simulated transactions

Agapiou, Andrew; Maharg, Paul; Nicol, Emma
Fonte: Higher Education Academy, Centre for Education in the Built Environment Publicador: Higher Education Academy, Centre for Education in the Built Environment
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
55.7%
The higher education sector is being confronted with a confluence of radical changes including rapidly evolving bodies of interdependent knowledge and skills, growing numbers of students, decreasing funding, and demand for flexible and individually tailored pedagogical frameworks. Some of these changes are antithetical with other changes whereas some call for radical rethinking of traditional teaching and learning strategies. To address the challenges of wider educational change and our local conditions, Strathclyde University has developed an approach to professional simulations called SIMPLE (SIMulated Professional Learning Environment). One aspect of the project focuses on developing an interactive digital learning environment to enable postgraduate Architecture students to learn some aspects of the Management, Practice and Law syllabus. This syllabus is arguably rather abstract in its content, and our hypothesis was that the development of a simulation environment could provide a more effective and engaging method for learning professional knowledge and skills. This paper describes the design, pedagogical structure, implementation and evaluation of the SIMPLE simulation within this module.

Developing a risk management "flight simulator" for manned space programs : a user interface to a system dynamic simulation of system safety at NASA

Friedenthal, Stephen R. (Stephen Roger)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 118 p.; 9351762 bytes; 9358928 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
55.59%
Simulators are a staple of any engineering project and manned space flight in particular. From pilot and crew training to maintenance and emergency repairs, very little is done without it first being thoroughly practiced and refined during advance simulation. Whether the simulation uses a computerized flight simulator that recreates the physics and experience of flight, or a simple mock-up with paper cutouts and hand tools, the end result is the same: people learn to make. better and safer decisions through advanced simulation and practice. However, there are no simulation tools in use to help NASA managers to understand the dynamics of systemic risk, or how to evaluate the inherent risk within an organization. This thesis describes the development of a risk management simulator that will enable NASA managers to explore the dynamics of risk using an advanced system dynamics simulation of the NASA safety culture prior to the Columbia Shuttle accident. This simulation model was developed by MIT Professor Nancy Leveson and her students as part of a NASA USRA research grant and has over 700 variables and several sub models.; (cont.) While the model is eminently useful to those familiar with system dynamics, the Vensim software application and the specific model structure...

Simulation-based medical teaching and learning

Al-Elq, Abdulmohsen H.
Fonte: Medknow Publications Pvt Ltd Publicador: Medknow Publications Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
Relevância na Pesquisa
45.79%
One of the most important steps in curriculum development is the introduction of simulation- based medical teaching and learning. Simulation is a generic term that refers to an artificial representation of a real world process to achieve educational goals through experiential learning. Simulation based medical education is defined as any educational activity that utilizes simulation aides to replicate clinical scenarios. Although medical simulation is relatively new, simulation has been used for a long time in other high risk professions such as aviation. Medical simulation allows the acquisition of clinical skills through deliberate practice rather than an apprentice style of learning. Simulation tools serve as an alternative to real patients. A trainee can make mistakes and learn from them without the fear of harming the patient. There are different types and classification of simulators and their cost vary according to the degree of their resemblance to the reality, or ‘fidelity’. Simulation- based learning is expensive. However, it is cost-effective if utilized properly. Medical simulation has been found to enhance clinical competence at the undergraduate and postgraduate levels. It has also been found to have many advantages that can improve patient safety and reduce health care costs through the improvement of the medical provider's competencies. The objective of this narrative review article is to highlight the importance of simulation as a new teaching method in undergraduate and postgraduate education.

Adaptive Execution: Exploration and Learning of Price Impact

Park, Beomsoo; Van Roy, Benjamin
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 26/07/2012
Relevância na Pesquisa
55.52%
We consider a model in which a trader aims to maximize expected risk-adjusted profit while trading a single security. In our model, each price change is a linear combination of observed factors, impact resulting from the trader's current and prior activity, and unpredictable random effects. The trader must learn coefficients of a price impact model while trading. We propose a new method for simultaneous execution and learning - the confidence-triggered regularized adaptive certainty equivalent (CTRACE) policy - and establish a poly-logarithmic finite-time expected regret bound. This bound implies that CTRACE is efficient in the sense that the ({\epsilon},{\delta})-convergence time is bounded by a polynomial function of 1/{\epsilon} and log(1/{\delta}) with high probability. In addition, we demonstrate via Monte Carlo simulation that CTRACE outperforms the certainty equivalent policy and a recently proposed reinforcement learning algorithm that is designed to explore efficiently in linear-quadratic control problems.; Comment: 31 pages, 4 figures

Mobile Network Anomaly Detection and Mitigation: The NEMESYS Approach

Abdelrahman, Omer H.; Gelenbe, Erol; Görbil, Gökçe; Oklander, Boris
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 17/05/2013
Relevância na Pesquisa
55.4%
Mobile malware and mobile network attacks are becoming a significant threat that accompanies the increasing popularity of smart phones and tablets. Thus in this paper we present our research vision that aims to develop a network-based security solution combining analytical modelling, simulation and learning, together with billing and control-plane data, to detect anomalies and attacks, and eliminate or mitigate their effects, as part of the EU FP7 NEMESYS project. These ideas are supplemented with a careful review of the state-of-the-art regarding anomaly detection techniques that mobile network operators may use to protect their infrastructure and secure users against malware.; Comment: To Appear in the Proceedings of the 28th International Symposium on Computer and Information Sciences (ISCIS 2013), Springer LNEE