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Color and Shape efficiency for outlier detection from automated to User evaluation

Visual Informatics 2022年第2期6卷 25-40页

作者： Loann Giovannangeli Romain Bourqui Romain Giot David Auber Univ.Bordeaux CNRSBordeaux INPINRIALaBRIUMR 5800F-33400 TalenceFrance

The design of efficient representations is well established as a fruitful way to explore and analyze complex or large data.In these representations,data are encoded with various visual attributes depending on the needs of the representation itself.To make coherent design choices about visual attributes,the visual search field proposes guidelines based on the human brain’s perception of features.However,information visualization representations frequently need to depict more data than the amount these guidelines have been validated on.Since,the information visualization community has extended these guidelines to a wider parameter space.This paper contributes to this theme by extending visual search theories to an information visualization context.We consider a visual search task where subjects are asked to find an unknown outlier in a grid of randomly laid out distractors.Stimuli are defined by color and shape features for the purpose of visually encoding categorical data.The experimental protocol is made of a parameters space reduction step(i.e.,sub-sampling)based on a machine learning model,and a User evaluation to validate hypotheses and measure capacity limits.The results show that the major difficulty factor is the number of visual attributes that are used to encode the outlier.When redundantly encoded,the display heterogeneity has no effect on the task.When encoded with one attribute,the difficulty depends on that attribute heterogeneity until its capacity limit(7 for color,5 for shape)is reached.Finally,when encoded with two attributes simultaneously,performances drop drastically even with minor heterogeneity.

关键词： Visual search Outlier detection User evaluation Deep learning Automated evaluation

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Designing generation Y interactions:The case of YPhone

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Virtual Reality & Intelligent Hardware 2022年第2期4卷 132-152页

作者： Wei LIU Faculty of Psychology Beijing Normal UniversityBeijing 100875China

Background With an increasing number of products becoming digital,mobile,and networked,paying attention to the quality of interactions with such products is also becoming more relevant.Although the quality of such interactions has been addressed in several scientific studies,little attention has been paid to their implementation in real life and everyday contexts.Methods This paper describes the development of a novel office phone prototype,called YPhone,which demonstrates the application of a specific set of Generation Y interaction qualities(instantaneous,playful,collaborative,expressive,responsive,and flexible)in the context of office work.The working prototype supports office workers in experiencing new types of interactions.It was set out in practice through a series of evaluations.Results We found that the playful,expressive,responsive,and flexible qualities incur greater trust than the instantaneous and collaborative qualities.Such qualities can be grouped,although this may differ for different evaluated products,and researchers must be cautious about generalizations.Conclusions The overall evaluation was deemed positive,with some valuable suggestions provided regarding its user interactions and features.

关键词： Generation Y office workers Interaction qualities Interactive prototyping User evaluation

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网络环境下高校图书馆用户满意度的综合测评

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情报理论与实践 2002年第5期25卷 363-365页

作者：陆伟华广西大学图书馆广西530004

The paper intends to discuss the user’s satisfaction rate in university libraries,and sets up a compound evaluation index system and a mathematic model by which we can describe and explain the user’s expectation rate and satisfaction rate.According to the result of the research,we can analyze the focus of the service and improve the integral service quality of the network library.

关键词： network libraries User evaluation

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On visualization techniques comparison for large social networks overview:A user experiment

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Visual Informatics 2020年第4期4卷 23-34页

作者： Bruno Pinaud Jason Vallet Guy Melancn University of Bordeaux CNRS UMR 5800 LaBRIFrance

Visualizing social networks,especially an overview emphasizing their structure,i.e.,communities and their interconnections,is known to be a challenging problem.In this paper,we present a set of design rationales to build such overview visualizations of social networks and our solution called Jasper.We evaluate its performances against two of the most wide-spread visualization techniques(matrix and node-link diagram)in a human–computer controlled experiment based on community-related tasks.While none of the techniques emerge as the overwhelming winner,Jasper appears to be one of the best methods for each task;a fact sustained by the marks given by the users.Overall,Jasper can be seen as an all-encompassing solution for quickly producing legible and compact overviews of large social networks on a single modern computer.

关键词： Overview visualization User evaluation Graphs andnetworks Social networks

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A user-Centered Multi-space Collaborative Visual Analysis for Cyber Security

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Chinese Journal of Electronics 2018年第5期27卷 910-919页

作者： ZHONG Zengsheng ZHAO Ying SHI Ronghua SHENG Yingshuai LIU Junrong MENG Hua LIN Dan School of Information Science and Engineering Central South University Information Office Chongqing Technology and Business University Key Laboratory of Network Assessment Technology Institute of Information EngineeringChinese Academy of Sciences

Based on a university’s practice in upgrading its network management platform, presents a visual analytic system which integrates network topological space,IP space and network geographical space into a collaborative solution to help network administrators address difficulties in locating end user and troubleshooting. Throughout the development cycle, we worked alongside with users to clarify their actual demands and habitual operations through scenario application, interviews and a variety of evaluation. This user-centered approach guides us step by step to apply cyber security visualization and visual analytic technology to actual use.

关键词： Cyber security Campus network management Visual analytics User evaluation

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evaluation of Urban Park Landscape in Ma’anshan Based on Analytic Hierarchy Process(AHP)

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Journal of Landscape Research 2020年第5期12卷 94-96,102页

作者： REN Yao ZHUANG Dehong WANG Zhenting YANG Huihui Academy of Art and Design Anhui University of TechnologyMa’anshanAnhui 243032China Nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjingJiangsu 210008China Funan Jinyuan Liumu Handicraft Co. Ltd.FuyangAnhui 236300China

In order to further develop the urban park landscape,the representative urban park landscape in Ma’anshan City is first evaluated and analyzed from the aspects of humanistic artistic value,social historical value and user experience value.Afterwards,the weight of each park landscape is judged by analytic hierarchy process(AHP),and it is found that the indexes in the criterion layer successively are user experience value>humanistic artistic value>social historical value;in the factor layer,excellent user experience,universal design,reasonable and perfect public services and layout suitable for urban planning are more important factors,while artistic conception creation has the lowest weight.Finally,based on the results obtained by AHP,the improvement and optimization strategy for urban park landscape in Ma’anshan City is proposed to further strengthen the development of urban parks in Ma’anshan City.

关键词： AHP Ma’anshan City Urban park landscape User evaluation

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