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A dynamic spectrum management algorithm in VDSL systems

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES 2016年第5期24卷 3483-3491页

作者： Sharma, Sunil Sahu, Om Parkash Natl Inst Technol Dept Elect & Commun Engn Kurukshetra Haryana India

A modified iterative water-filling algorithm is proposed in which power from only those subcarriers of the near end user are reduced, which has the worst effect on bit rates of far end users. The power back off from these subcarriers is done by reducing power spectral masks at respective subcarriers. The results after simulating the proposed algorithm give significant performance advantages in terms of data rate over the traditional iterative water-filling algorithm. These results approach the performance of highly complex optimal spectrum management algorithms while maintaining the complexity of the traditional iterative water-filling algorithm.

关键词： Digital subscriber line dynamic spectrum management iterative water-filling optimal spectrum balancing coding scheme

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The Research on coding scheme of Binary-Tree for XML

The Research on Coding Scheme of Binary-Tree for XML

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International Conference on Power Electronics and Engineering Application (PEEA)

作者： Ke, Xiao Hunan Univ Sci & Engn Comp & Commun Engn Dept Yongzhou 425100 Hunan Peoples R China

Usually, there are four different options when store and query the XML data: Firstly, use the file system;secondly, use relational database system;thirdly, use object-oriented database system;fourthly, establish a special database system known as the native XML database system, such as Tamino, TextML. In order to effectively support the query, for the query in the structure of the XML, one method is establishing the path index of the XML documents tree, and speeding up the calculation capability to the query in the structure of the XML by the path index;another method is encoding the XML document tree nodes, that is, giving a unique code to each node of the XML document tree in order to directly identify the structural relationship in the nodes using the codes, rather than traverse the original XML documents. In other words, it is through coding to change calculations of the query in the structure of XML into calculations of the connection in it. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [name organizer]

关键词： XML coding scheme file system 1.Introduction

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A Half-Duplex Relay coding scheme Optimized for Energy Efficiency

A Half-Duplex Relay Coding Scheme Optimized for Energy Effic...

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IEEE Information Theory Workshop (ITW)

作者： Parzysz, Fanny Vu, Mai H. Gagnon, Francois Ecole Technol Super Montreal PQ Canada McGill Univ Montreal PQ Canada

ISBN: (纸本)9781457704376

We explore the issue of the network energy efficiency in relay channels. We first propose a half-duplex decode-forward coding scheme. We then optimize the power allocation to minimize the total power consumption while maintaining a desired source rate. We show that this scheme significantly outperforms direct and two-hop transmissions. Moreover, it reduces the relay energy consumption by up to 7dB, which is beneficial for shared relay stations, and smooths out transmit power peaks, which simplifies interference management.

关键词： Relay channel Half-duplex coding scheme Achievable rate Energy efficiency

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Identifying Flow in Video Games: Towards a New Observation-Based Method

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INTERNATIONAL JOURNAL OF GAMING AND COMPUTER-MEDIATED SIMULATIONS 2016年第3期8卷 19-38页

作者： Borderie, Joceran Michinov, Nicolas Univ Rennes 2 Rennes France Univ Rennes 2 Social Psychol Rennes France

The flow, or optimal experience, is a highly focused mental state leading to immersion and high performance. Although flow theory has been widely applied to research on videogames, methods based on behavior observation to identify flow states are limited in this domain. The aim of the present study was to develop a new method to detect flow episodes occurring during a gaming session from observation of players' behaviors and analysis of game replays. The authors developed an optimal experience behavior pattern and a related coding scheme. In-depth interviews were then conducted to determine whether episodes coded as flow by researchers were also described as such by the players themselves. Findings showed that intense concentration followed by an expression of satisfaction could be a useful pattern to detect flow. Unexpectedly, the interviews suggested that frustration, as well as joy, may also be an emotional signature of flow. This study shed new light on the relationship between gameplay and flow.

关键词： coding scheme Combo Concentration Emotional Signature Flow Game Replay Gameplay In-Depth Interviews Observation Method Player Behavior

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The Communicative Work of Biology-Journal Captions: Lessons for Technical and Professional Communication

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TECHNICAL COMMUNICATION QUARTERLY 2016年第4期25卷 260-277页

作者： Smith, Jordan Mackiewicz, Jo Hanson, Derek Fanning, Shannon N. Doan, Sara Iowa State Univ Rhetor & Profess Commun Program Ames IA USA Iowa State Univ Appl Linguist & Technol Program Ames IA USA Iowa State Univ Rhetor & Profess Commun Ames IA USA Iowa State Univ Rhetor & Profess Commun Program Digital Rhetor Content Management & Multimedia Pr Ames IA USA Iowa State Univ Rhetor & Profess Commun Program Data Visualizat & Rhetor Sci Ames IA USA Univ Wisconsin Profess Writing Program Rhetor Technol Milwaukee WI 53201 USA

The authors examined a corpus of figure captions from technical and professional communication (TPC)-journal articles to test their sense that TPC captions do not fulfill their communicative potential as well as, they sensed, journals in science often do. The authors performed a content analysis on captions from biology-journal articles and iteratively tested a coding scheme of caption content. The resulting scheme can help in analyzing caption content, developing captions, and imparting a variety of TPC-related skills to students.

关键词： Biology journals captions coding scheme content analysis figures technical and professional communication journals visuals

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coding schemes for Observational Studies of Usability in Collaborative Tangible User Interfaces 17th

Coding Schemes for Observational Studies of Usability in Col...

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2nd International Conference on Learning and Collaboration Technologies / 17th International Conference on Human-Computer Interaction

作者： Alrashed, Tarfah Almalki, Almaha Aldawood, Salma Alfaris, Anas Al-Wabil, Areej King Abdulaziz City Sci & Technol Ctr Complex Engn Syst Riyadh Saudi Arabia MIT Cambridge MA 02139 USA Prince Sultan Univ Coll Comp & Informat Sci Riyadh Saudi Arabia

ISBN: (纸本)9783319213804;9783319213798

With the growing complexity in Tangible User Interfaces (TUIs) and their integration in the decision-making process, user acceptance of these TUI systems continues to be an important issue. Drawing upon recent findings in computer-mediated communication, human computer interaction, computer-supported-cooperative work, and social psychology, the present research extends the coding schemes for observational video analysis by incorporating the variables of communication and collaboration in the context of systems designed for urban planning and modeling.

关键词： coding scheme TUI HCI User experience Complex systems Urban planning

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BORIS: a free, versatile open-source event-logging software for video/audio coding and live observations

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METHODS IN ECOLOGY AND EVOLUTION 2016年第11期7卷 1325-1330页

作者： Friard, Olivier Gamba, Marco Univ Torino Dept Life Sci & Syst Biol Via Accademia Albertina 13 I-10123 Turin Italy

Quantitative aspects of the study of animal and human behaviour are increasingly relevant to test hypotheses and find empirical support for them. At the same time, photo and video cameras can store a large number of video recordings and are often used to monitor the subjects remotely. Researchers frequently face the need to code considerable quantities of video recordings with relatively flexible software, often constrained by species-specific options or exact settings. BORIS is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations. Being open to user-specific settings, the program allows a project-based ethogram to be defined that can then be shared with collaborators, or can be imported or modified. Projects created in BORIS can include a list of observations, and each observation may include one or two videos (e.g. simultaneous screening of visual stimuli and the subject being tested;recordings from different sides of an aquarium). Once the user has set an ethogram, including state or point events or both, coding can be performed using previously assigned keys on the computer keyboard. BORIS allows definition of an unlimited number of events (states/point events) and subjects. Once the coding process is completed, the program can extract a time-budget or single or grouped observations automatically and present an at-a-glance summary of the main behavioural features. The observation data and time-budget analysis can be exported in many common formats (TSV, CSV, ODF, XLS, SQL and JSON). The observed events can be plotted and exported in various graphic formats (SVG, PNG, JPG, TIFF, EPS and PDF).

关键词： behavioural analysis behaviour coding coding scheme ethology observational data ttime-budget

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Exploring Representations of Student Time-Use 9th

Exploring Representations of Student Time-Use

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9th International Conference on the Theory and Applications of Diagrams (Diagrams)

作者： Fox, Amy Rae de Vries, Erica Lima, Laurent Loker, Savannah Calif State Univ Chico Chico CA 95929 USA Univ Grenoble Alpes Lab Educ Sci Grenoble France

ISBN: (纸本)9783319423333;9783319423326

How does one visually represent the use of time? We explored students' use of graphical metaphors by asking undergraduates at a public French university to generate representations of their personal time-use including: activities, sequence, duration, timing, and frequency. The resulting use of space and form was analyzed by way of an iteratively developed coding scheme. We discuss how the analyses of the spontaneous productions support previous research on spatial representations of time, and the implications for the design of time management tools for students.

关键词： Spontaneous representation Diagrams Visualization Student time-use coding scheme Visual content analysis

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Where Do Experts Look While Doing 3D Image Segmentation 16

Where Do Experts Look While Doing 3D Image Segmentation

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9th Biennial ACM Symposium on Eye Tracking Research and Applications (ETRA)

作者： Sanandaji, Anahita Grimm, Cindy West, Ruth Parola, Max Kajihara, Meghan Deutsch, Jeremy Carlew, Anne Yates, Deniece Oregon State Univ Corvallis OR 97331 USA Univ North Texas Denton TX 76203 USA

ISBN: (纸本)9781450341257

3D image segmentation is a fundamental process in many scientific and medical applications. Automatic algorithms do exist, but there are many use cases where these algorithms fail. The gold standard is still manual segmentation or review. Unfortunately, even for an expert this is laborious, time consuming, and prone to errors. Existing 3D segmentation tools do not currently take into account human mental models and low-level perception tasks. Our goal is to improve the quality and efficiency of manual segmentation and review by analyzing how experts perform segmentation. As a preliminary step we conducted a field study with 8 segmentation experts, recording video and eye tracking data. We developed a novel coding scheme to analyze this data and verified that it successfully covers and quantifies the low-level actions, tasks and behaviors of experts during 3D image segmentation.

关键词： 3D image segmentation perception coding scheme

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A Design Space for Engineering Graphical Adaptive Menus 16

A Design Space for Engineering Graphical Adaptive Menus

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8th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS)

作者： Bouzit, Sara Calvary, Gaelle Chene, Denis Vanderdonckt, Jean Orange Labs 28 Chemin Vieux Chene F-38240 Meylan France Univ Grenoble Alpes LIG DNRS F-38000 Grenoble France Catholic Univ Louvain Louvain Sch Management Louvain Interact Lab B-1348 Louvain La Neuve Belgium

ISBN: (纸本)9781450343220

This paper presents a design space for exploring design options of adaptive graphical menus based on Bertin's eight visual variables: position, size, shape, value, color, orientation, texture, and motion. In order to transfoun a traditional (static) menu into an adaptive one, at least one visual variable should be exploited to convey which menu items have been promoted or demoted depending on five characteristics: select, associative, quantitative, order, and length. The paper reviews selected adaptive menu interaction techniques belonging to each of these variables, classifies them according to the variables and characteristics and suggests not yet explored adaptive menu designs. It then defines four stability properties depending on which variables remain constant after adaptivity. A supporting software for prototyping the rendering of graphical adaptive menus is then introduced.

关键词： Adaptation adaptive menu coding scheme prediction window stability property visual variable

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