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An Instant Messaging Framework for Flexible Interaction with Rich Clients

An Instant Messaging Framework for Flexible Interaction with...

引用

IEEE Annual International computer Software and Applications conference (COMPSAC)

作者： Matthias Book Volker Gruhn Chair of Applied Telematics/e-Business Department of Computer Science University of Leipzig Leipzig Germany

Today, we are seeing an increasing number of software applications that users want to use anywhere, anytime. Such mobile applications often deliver their user interfaces (UIs) to client devices over the World Wide Web. However, Web-based UIs cannot provide the same level of usability as window-based UIs on mobile devices with their small screens and occasional network dropouts. To address this challenge, we present a UI framework that combines the usability of a full-featured UI with the flexibility of a thin presentation logic: We exchange interface specifications and events between the application logic on the server and a generic UI rendering engine on the client device using an instant messaging infrastructure. The paper gives an overview of the framework architecture and the features of the communication protocol, and discusses performance measurements obtained on a public network.

关键词： Application software Usability Logic devices User interfaces Web sites Network servers Rendering (computer graphics) Engines Protocols Measurement

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Potholes in the information highway: the Internet and plagiarism

Potholes in the information highway: the Internet and plagia...

引用

Frontiers in Education (FIE) conference

作者： I.st. Omer College of Engineering & Technology Department of Electrical Engineering Northern Arizona University Flagstaff AZ USA

The Internet is an appealing medium for its potential to improve the educational experience for both traditional and distance learning students. A wealth of information on a wide variety of topics offers assistance, and apparently, temptation. Although the student handbook at every institution contains some language defining plagiarism, I am unaware of any definitions that include mention of the Internet and digital media. This has blurred the line for many students and created additional burdens for the academic community. This paper reviews my experience with Internet plagiarism and discusses two possible solutions.

关键词： Road transportation Internet Plagiarism Seminars Fuzzy logic computer aided instruction Writing Information resources graphics Educational institutions

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Terrain rendering algorithm performance analysis

Terrain rendering algorithm performance analysis

引用

conference on Digital Avionics Systems (DASC)

作者： Lukas Polok Radek Barton Peter Chudy Premysl Krsek Pavel Smrz Dittirch Petr Faculty of Information Technology IT4Innovations Centre of Excellence Brno University of Technology Brno Czech Republic

Nowadays, the flight guidance equipment supplies practically all the information, required for aircraft navigation. Pseudo-realistic terrain visualization is undoubtedly an important part of this information. Although modern graphics processors are able to render realistic terrain at interactive frame rates, in some applications, it is beneficial to use low-power graphics hardware, perhaps from weight or power supply capacity restrictions. These low-power graphics processors typically manifest much lower computational power than conventional hardware, severely limiting the capability of terrain visualization. A novel method for caching terrain tiles is presented in this paper, enabling faster and more detailed terrain rendering, using lighter devices that consume less power. The main focus was on memory and time efficiency on common low-power graphics hardware. The terrain rendering algorithm being employed in our implementation is derived from the seamless patches algorithm. Different aspects of terrain tile swapping were examined in order to devise a simple hardware metric. An efficient tile caching approach was developed, based on this hardware metric, and its performance was evaluated.

关键词： Tiles Rendering (computer graphics) Hardware graphics processing units Measurement Indexes

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Practical people counting algorithm 31

Practical people counting algorithm

引用

31st International conference on computer graphics and Vision, GraphiCon 2021

作者： Mamedov, Timur Kuplyakov, Denis Konushin, Anton Lomonosov Moscow State University 1 Leninskie Gory Moscow Moscow119991 Russia Video Analysis Technologies 7 Sculptora Mukhina Moscow119634 Russia NRU Higher School of Economics 11 Pokrovsky Bulvar Moscow109028 Russia

In this paper, we consider the problem of people counting in video surveillance. This is an important task in video analysis, because this data can be used for predictive analytics and improvement of customer services, traffic control, etc. The proposed methods are based on object tracking and are able to work on sparse frames, which allows them to work faster and requires minimum computing resources. We use the algorithm from [1] as a baseline, which based on object tracking by head detections. Head tracking in baseline is proved to be more robust and accurate as the heads are less susceptible to occlusions. But this approach has two disadvantages: the height of people is different, which means that people’s heads are in different planes, so the raised signal line doesn’t look so clear, and also because of this, the accuracy of people counting may decrease. In baseline, this problems were solved using head-to-body linear regression, which had to be retrained for each scene, but this complicates the use of the algorithm for practical purposes. In this paper, we propose a new neural network head-to-body regressor, which allows us to solve the mentioned problems at once. Also in this paper, we use a new visual tracking algorithm that allowed us to speed up our solution. In this work, we introduce two methods — distributed modified baseline algorithm with high people counting accuracy and a solution that can run on a single processor core. Our experimental evaluation showed that the proposed modifications are consistent. © 2021 Copyright for this paper by its authors.

关键词： computer vision

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A global router on GPU architecture

A global router on GPU architecture

引用

IEEE International conference on computer Design: VLSI in computers and Processors, (ICCD)

作者： Yiding Han Koushik Chakraborty Sanghamitra Roy Electrical and Computer Engineering Utah State University

In the modern VLSI design flow, global router is often utilized to provide fast and accurate congestion analysis for upstream processes to improve the design routability. Global routing parallelization is a good candidate to speedup its runtime performance while delivering very competitive solution quality. In this paper, we first study the cause of insufficient exploitable concurrency of the existing net level concurrency model, which has become a major bottleneck for parallelizing the emerging design problems. Then, we mitigate this limitation with a novel fine grain parallel model, with which a GPU based multi-agent global router is designed. Our experimental results indicate that the parallel model can effectively support the GPU based global router, and deliver stable solutions. The runtime comparison with NCTUgr2 has shown that upto 3.9× speedup is achieved by the GPU based router.

关键词： Routing graphics processing units Concurrent computing Topology Benchmark testing Memory management Degradation

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Robust Feature Spaces from Pre-Trained Deep Network Layers for Skin Lesion Classification

Robust Feature Spaces from Pre-Trained Deep Network Layers f...

引用

Brazilian Symposium on computer graphics and Image Processing (SIBGRAPI)

作者： Fernando Pereira dos Santos Moacir Antonelli Ponti Institute of Mathematical and Computer Sciences (ICMC) University of São Paulo (USP) São Carlos SP Brazil

The incidence of skin cancer in the world population is a public health concern, and the first diagnosis takes into account the appearance of lesions on skin. In this context, automated methods to aid the screening for malign lesions can be an important tool. However, the efficiency of developed methods depends directly on the quality of the generated feature space which may vary when considering different image datasets and sources. We present a detailed study of feature spaces obtained from deep convolutional networks (CNNs), using the benchmark PH2 dataset, considering three CNN architectures, as well as investigating different layers, impact of dimensionality reduction, use of colour quantisation and noise addition. Our results show that, features have discriminative capability comparable to competing methods with balanced accuracy 94%, and 95% with noise injection. Additionally, we present a study of fine-tuning and generalisation across image quantisation and noise levels, contributing to the discussion of learning features from deep networks and offering a guideline for future works.

关键词： Feature extraction Lesions Skin Image color analysis Skin cancer Radio frequency

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An application-centered course on data-driven web sites

An application-centered course on data-driven web sites

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Frontiers in Education (FIE) conference

作者： D.R. Jacobs B.A. Malloy Department of Computer Science Clemson University Clemson SC USA

In this paper, we describe our experience with an application-centered approach in teaching a course on web technology. The purpose of the course was to teach the principles of data-base driven web sites, their design and the integration of the underlying components. The class was partitioned into small teams, where each team had their own dedicated server. Each team was responsible for achieving certain milestones that culminated in the implementation of a data-base driven web site. Lectures and demonstrations were used to provide information on a need-to-know basis. Our experience was highly positive. Synergy and student motivation grew as the course progressed. By the end of the semester teams had developed near-professional quality web sites. We describe course details including syllabus, lecture topics, and milestone objectives.

关键词： Jacobian matrices Web page design Programming profession Databases computer science education computer science computer graphics computer languages Technological innovation Software engineering

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HyperXRC: Hybrid In-Person + Remote Extended Reality Classroom - A Design study 31

HyperXRC: Hybrid In-Person + Remote Extended Reality Classro...

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31st IEEE conference on Virtual Reality and 3D User Interfaces, VR 2024

作者： Huang, Siyu Popescu, Voicu Purdue University United States

ISBN: (纸本)9798350374025

This paper investigates HyperXRC, a hybrid classroom design that accommodates both local and remote students. The instructor wears an extended reality (XR) headset that shows the local classroom and the local students, as well as remote students modeled with video sprites. The remote students are displayed either on virtual banners hanging off the classroom ceiling, or on virtual billboards placed in empty classroom seats. Thereby, the remote students are integrated into the field of view of the instructor, who remains aware of the remote students while teaching. A controlled user study with two experiments evaluated the HyperXRC design from the instructor and from the local students perspective. In the first experiment (N = 15) participants served as instructors to a hybrid classroom of 14 local and 15 remote students. Participants were more likely to detect hand-raising and head-on-desk remote student actions in the HyperXRC conditions (59%) than in a conventional videoconferencing condition (36%). This advantage did not come at the cost of decreasing the detection rate of local student actions. Furthermore, instructor participants preferred the HyperXRC to the videoconferencing approach. In the second experiment (N = 16) participants served as local students. The participants preferred the lecture when the instructor used videoconferencing to the one when the instructor used HyperXRC, wearing the XR headset. © 2024 IEEE.

关键词： Human computer interaction

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Deep Transfer Learning for Segmentation of Anatomical structures in Chest Radiographs

Deep Transfer Learning for Segmentation of Anatomical Struct...

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Brazilian Symposium on computer graphics and Image Processing (SIBGRAPI)

作者： Hugo Oliveira Jefersson dos Santos Department of Computer Science Universidade Federal de Minas Gerais Minas Gerais

Segmentation of anatomical structures in Chest Posterior-Anterior Radiographs is a classical task on biomedical image analysis. Deep Learning has been widely used for detection and diagnosis of illnesses in several medical image modalities over the last years, but the portability of deep methods is still limited, hampering the reusability of pre-trained models in new data. We address this problem by proposing a novel method for Cross-Dataset Transfer Learning in Chest X-Ray images based on Unsupervised Image Translation architectures. Our Transfer Learning approach achieved Jaccard values of 88.20% on lung field segmentation in the Montgomery Set by using a pre-trained model on the JSRT dataset and no labeled data from the target dataset. Several experiments in unsupervised and semi-supervised transfer were performed and our method consistently outperformed simple fine-tuning when a limited amount of labels is used. Qualitative analysis on the tasks of clavicle and heart segmentation are also performed on Montgomery samples and pre-trained models from JSRT dataset. Our secondary contributions encompass several experiments in anatomical structure segmentation on JSRT, achieving state-of-the-art results in lung field (96.02%), heart (89.64%) and clavicle segmentation (87.30%).

关键词： Image segmentation Task analysis Lung computer architecture Heart Biomedical imaging Semantics

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Multi-level configuration management with fine-grained logical units

Multi-level configuration management with fine-grained logic...

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Euromicro conference on Software Engineering and Advanced Applications (SEAA)

作者： T.N. Nguyen E.V. Munson J.T. Boyland Cheng Thao Computer Science Department University of Wisconsin Milwaukee USA

The ability to manage the evolution of logical structures in software artifacts is crucial to the success in developing software systems. However, many existing version control systems often manage artifacts as files and have little or no knowledge of their logical structures. Therefore, the development and maintenance process of a system becomes less efficient. We have developed an object-oriented configuration management (SCM) infrastructure that can be used to build SCM services in any development environment. This paper describes the application of that infrastructure to construct a multi-level SCM system for source code and structured documents. The key contribution is the structure-oriented product versioning model that enables flexible management of the evolution of fine-grained logical units at any structural level in a software artifact.

关键词： Software systems Application software Object oriented modeling computer science Software development management Control systems Knowledge management Environmental management computer architecture graphics

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