[1]
Interruption-Sensitive Empty Result Feedback: Rethinking the Visual Query
Feedback Paradigm for Semistructured Data
Session 4B: Query Explanation
/
Bhowmick, Sourav S.
/
Dyreson, Curtis
/
Choi, Byron
/
Ang, Min-Hwee
Proceedings of the 2015 ACM Conference on Information and Knowledge
Management
2015-10-19
p.723-732
© Copyright 2015 ACM
Summary: The usability of visual querying schemes for tree and graph-structured data
can be greatly enhanced by providing feedback during query construction, but
feedback at inopportune times can hamper query construction. In this paper, we
rethink the traditional way of providing feedback. We describe a novel vision
of interruption-sensitive query feedback where relevant notifications are
delivered quickly but at an appropriate moment when the mental workload of the
user is low. Though we focus on one class of query feedback, namely empty
result detection, where a user is notified when a partially constructed visual
query yields an empty result, our new paradigm is applicable to other kinds of
feedback. We present a framework called iSERF that bridges the classical
database problem of empty-result detection with intelligent notification
management from the domains of HCI and psychology. Instead of immediate
notification, iSERF considers the structure of query formulation tasks and
breakpoints when reasoning about when to notify the user. We present an
HCI-inspired model to quantify the performance bounds that iSERF must abide by
for checking for an empty result in order to ensure interruption-sensitive
notification at optimal breakpoints. We implement this framework in the context
of visual XML query formulation and highlight its effectiveness empirically.
[2]
Privacy by Design: Examining Two Key Aspects of Social Applications
Social Media for Business
/
Choi, Ben C. F.
/
Tam, Joseph
HCIB 2015: 2nd International Conference on HCI in Business
2015-08-02
p.41-52
Keywords: Social applications; Online social networks; Information privacy
© Copyright 2015 Springer International Publishing Switzerland
Summary: Social applications do not only acquire users' personal information but
potentially also collects the personal information of users' social networks.
Despite considerable discussion of privacy problems in prior work, questions
remain as to how to design privacy-preserving social applications and how to
evaluate its effect on privacy. Drawing on the justice framework, we identify
two key aspects of social, namely information acquisition and exposure control
and examine the effects on user evaluation of social applications. Furthermore,
we investigate the impact of this evaluation on usage intention. In doing so,
we provide new insight into embedding privacy in technology development.
[3]
A Study on Mobile Fitness Application Usage
Enterprise Systems, Business and Gamification
/
Choi, Ben C. F.
/
Lee, Nathaniel T.
HCIB 2015: 2nd International Conference on HCI in Business
2015-08-02
p.446-457
Keywords: Expectation-confirmation; Satisfaction; Perceived usefulness; Perceived
enjoyment; Continued usage; Mobile fitness applications
© Copyright 2015 Springer International Publishing Switzerland
Summary: Although the importance of physical activity in a healthy lifestyle is well
known, little attention has been paid thus far to systematically understand
users' continued usage of mobile fitness applications. The objective of this
paper is to understand the determinants of usage of mobile fitness applications
beyond initial adoption. The research model is tested with data collected from
fifty users of mobile fitness applications. The results indicate that
expectation confirmation is the key predicator of attitudes towards the
application, such as perceived usefulness, perceived enjoyment, and
satisfaction. Furthermore, users' attitudes are found to determine continued
usage intention. Overall, this paper contributes by integrating intrinsic
motivation into the expectation-confirmation model for mobile fitness
application usage.
[4]
An Investigation of Information Acquisition and Personal Network Exposure in
Social Recommendation Applications
/
Choi, Ben CF
/
Ramesh, Bharat
Proceedings of the 2014 AIS SIGHCI Workshop on HCI Research in MIS
2014-12-14
p.5
[5]
Social Applications: The Effects of Privacy Calculus on Usage Behavior
/
Ramesh, Bharat
/
Choi, Ben CF
Proceedings of the 2014 AIS SIGHCI Workshop on HCI Research in MIS
2014-12-14
p.4
[6]
A voice-controlled web browser to navigate hierarchical hidden menus of web
pages in a smart-tv environment
WWW 2014 developers' track
/
Han, Sungjae
/
Jung, Geunseong
/
Ryu, Minsoo
/
Choi, Byung-Uk
/
Cha, Jaehyuk
Companion Proceedings of the 2014 International Conference on the World Wide
Web
2014-04-07
v.2
p.587-590
© Copyright 2014 ACM
Summary: This paper proposes a new voice web browser that can be operated in smart TV
environments. Previous voice web browsers had the limitation of being run under
limited conditions; for example, a list of the specific contents of a page was
outputted by voice, or the user entered a search term by voice. In our method
proposed in this paper, all the hierarchical menu areas on a web page are
recognized and controlled with voice keywords so that page navigation according
to a menu can be conveniently done in a voice supported web browser. Although
many studies have been conducted on web page menu recognition, most of them
provide insufficient information to recognize the hierarchical menu structure.
In other words, most web pages in recent browsers showed submenus only as a
result of a specific user interaction, since these previous studies had no way
of recognizing or controlling the submenus. Therefore, in the web browser
proposed in this study, a hierarchical menu structure, which is inserted
dynamically via user interaction, is recognized and selected by voice, thus
making it possible to maneuver on the web page. Furthermore, the core code of
the browser is implemented in JavaScript, so it can be flexibly used not only
for a web browser on Smart TVs, but also as functional extensions of existing
web browsers in a PC environment.
[7]
Development of a scale for fantasy state in digital games
/
Choi, Beomkyu
/
Huang, Jie
/
Jeffrey, Annie
/
Baek, Youngkyun
Computers in Human Behavior
2013-09
v.29
n.5
p.1980-1986
Keywords: Digital game
Keywords: Fantasy
Keywords: Intrinsic motivation
Keywords: Exploratory factor analysis
Keywords: Confirmatory factor analysis
© Copyright 2013 Elsevier Ltd.
Summary: Digital games appear to motivate players intrinsically. Of various game
features, fantasy in particularly plays a crucial role in enhancing motivation
and is a key factor in immersion in gameplay. As with its inherent value,
fantasy also plays a vital role in distinguishing digital games itself from
other media. Despite its significance, fantasy has received little attention,
and this concept is still ambiguous to define with any certainty. This study
thus aims to create a framework to explore a dimension of fantasy and to
develop a scale to measure a state of fantasy in digital games. As a result,
four factors were extracted, which were 'identification', 'imagination',
'analogy', and 'satisfaction', to account for fantasy state in digital
gameplay. Based on these factors, a fantasy scale in digital games (FSDGs)
included 16 items was developed.
[8]
Analysis of Perceived Discomfort and EMG for Touch Locations of a Soft
Keyboard
Ergonomic and Human Modelling Issues
/
Choi, Bori
/
Park, Sukbong
/
Jung, Kihyo
HCI International 2013: 15th International Conference on HCI: Posters'
Extended Abstracts Part I
2013-07-21
v.6
p.518-522
Keywords: Soft Keyboard; Discomfort; EMG; Two-thumb Input; Smartphone
© Copyright 2013 Springer-Verlag
Summary: With diversity of mobile services (e.g., messenger, and social network
service) on smartphone, the demand of text input using a soft keyboard is
increasing. However, studies on subjective and physiological responses of users
for various touch locations are lacking. The present study investigated the
ergonomic responses according to touch locations of a soft keyboard on
smartphone. The experiment of the present study measured perceived discomfort
using Borg's CR-10 scale and electromyography on forearm (abductor pollicis
longus, and extensor digitorum communis) and thumb (abductor pollicis brevis,
and first dorsal interossei) muscles. Perceived discomfort was significantly
varied from 0.7 (extremely weak discomfort) to 2.5 (weak discomfort) depending
on touch locations. %MVC at abductor pollicis brevis was significantly
varied from 10% to 23% according to touch locations. The experimental results
of the present study can be utilized in the ergonomic design of a soft
keyboard.
[9]
The Effects of Social Structure Overlap and Profile Extensiveness on Online
Social Connectivity Regulation
/
Choi, Ben
/
Jiang, Zhenhui
Proceedings of the 2012 AIS SIGHCI Workshop on HCI Research in MIS
2012-12-16
p.1
Keywords: Online Social Network, Online Social Connectivity, Impression Formation,
Privacy Calculus, Intention to Accept
Session 3, Paper 3
Summary: In online social networks, new social connectivity is established when a
requestee accepts a friend request from an unfamiliar requestor. While users
are generally willing to establish online social connectivity, they are at
times reluctant in constructing profile connections with unfamiliar others.
Drawing on the interpersonal cognition literature and the privacy calculus
perspective, this paper examines the effects of social structure overlap and
profile extensiveness on privacy risks as well as social capital gains and how
the requestee responds to a friend request (i.e., intention to accept). The
results of a quasi-experiment involving 101 respondents provide strong evidence
that social structure overlap and profile extensiveness influence privacy risks
and social capital gains. In addition, while privacy risks reduce intention to
accept, social capital gains increase intention to accept online social
connectivity.
[10]
Spatial-aware interest group queries in location-based social networks
Databases poster session
/
Li, Yafei
/
Wu, Dingming
/
Xu, Jianliang
/
Choi, Byron
/
Su, Weifeng
Proceedings of the 2012 ACM Conference on Information and Knowledge
Management
2012-10-29
p.2643-2646
© Copyright 2012 ACM
Summary: Location-based social networks, such as Foursquare and Facebook Places, are
bridging the gap between the physical world and online social networking
services through acquired user locations. Some social networks released
check-in services that allow users to share their visiting locations with their
friends. In this paper, users' interests are modeled by check-in actions. We
propose a new spatial-aware interest group (SIG) query that retrieves a user
group of size k where every user is highly interested in the query keyword and
also spatially close to each other. An efficient algorithm AIR based on the
IR-tree is proposed for the processing of SIG queries. Furthermore, an
optimization is developed and achieves a much better performance than the
baseline algorithm.
[11]
Predicting the optimal ad-hoc index for reachability queries on graph
databases
Poster session: databases
/
Deng, Jintian
/
Liu, Fei
/
Peng, Yun
/
Choi, Byron
/
Xu, Jianliang
Proceedings of the 2011 ACM Conference on Information and Knowledge
Management
2011-10-24
p.2357-2360
© Copyright 2011 ACM
Summary: Due to the recent advances in graph databases, a large number of ad-hoc
indexes for a fundamental query, in particular, reachability query, have been
proposed. The performances of these indexes on different graphs have known to
be very different. Worst still, deriving an accurate cost model for selecting
the optimal index of a graph database appears to be a daunting task. In this
paper, we propose a hierarchical prediction framework, based on neural networks
and a set of graph features and a knowledge base on past predictions, to
determine the optimal index for a graph database. For ease of presentation, we
propose our framework with three structurally distinguishable indexes. Our
experiments show that our framework is accurate.
[12]
PCMLogging: reducing transaction logging overhead with PCM
Poster session: databases
/
Gao, Shen
/
Xu, Jianliang
/
He, Bingsheng
/
Choi, Byron
/
Hu, Haibo
Proceedings of the 2011 ACM Conference on Information and Knowledge
Management
2011-10-24
p.2401-2404
© Copyright 2011 ACM
Summary: Phase Changing Memory (PCM), as one of the most promising next-generation
memory technologies, offers various attractive properties such as
non-volatility, bit-alterability, and low idle energy consumption. In this
paper, we present PCMLogging, a novel logging scheme that exploits PCM devices
for both data buffering and transaction logging in disk-based databases.
Different from the traditional approach where buffered updates and transaction
logs are completely separated, they are integrated in the new logging scheme.
Our preliminary experiments show an up to 40% improvement of PCMLogging in disk
I/O performance in comparison with a basic buffering and logging scheme.
[13]
Measurement development for cultural characteristics of mobile Internet
users at the individual level
/
Lee, Inseong
/
Kim, Jinwoo
/
Choi, Boreum
/
Hong, Se-Joon
Computers in Human Behavior
2010-11
v.26
n.6
p.1355-1368
Keywords: Culture
Keywords: Mobile Internet
Keywords: Individualism
Keywords: Uncertainty avoidance
Keywords: Contextuality
Keywords: Time perception
© Copyright 2010 Elsevier Ltd.
Summary: Culture plays an important role in how an information technology is
developed and used. However, few studies attempt to identify the cultural
traits most relevant to the specific technology being examined. The main
purpose of this study is to develop measures for cultural characteristics of
individual users with a specific information technology, the mobile Internet.
We propose measures for four cultural characteristics important in the context
of the mobile Internet, which are expected to be widely used in the future. The
proposed measures were verified empirically through online surveys conducted in
seven countries. The results indicate that the measures have high validity and
reliability, as well as comparability among the seven countries. The paper ends
with a discussion of the study's limitations and implications.
[14]
StableBuffer: optimizing write performance for DBMS applications on flash
devices
DB track: mobile and distributed data management
/
Li, Yu
/
Xu, Jianliang
/
Choi, Byron
/
Hu, Haibo
Proceedings of the 2010 ACM Conference on Information and Knowledge
Management
2010-10-26
p.339-348
© Copyright 2010 ACM
Summary: Flash devices have been widely used in embedded systems, laptop computers,
and enterprise servers. However, the poor random writes have been an obstacle
to running write-intensive DBMS applications on flash devices. In this paper,
we exploit the recently discovered, efficient write patterns of flash devices
to optimize the performance of DBMS applications. Specifically, motivated by a
focused write pattern, we propose to write pages temporarily to a small,
pre-allocated storage space on the flash device, called StableBuffer, instead
of directly writing to their actual destinations. We then recognize and flush
efficient write patterns of the buffer to achieve a better write performance.
In contrast to prior log-based techniques, our StableBuffer solution does not
require modifying the driver of flash devices and hence works well for
commodity flash devices. We discuss the detailed design and implementation of
the StableBuffer solution. Performance evaluation based on a TPC-C benchmark
trace shows that StableBuffer improves the response time and throughput of
write operations by a factor of 1.5-12, in comparison with a direct
write-through strategy.
[15]
Socialization tactics in wikipedia and their effects
Wikipedia as a collaboration culture
/
Choi, Boreum
/
Alexander, Kira
/
Kraut, Robert E.
/
Levine, John M.
Proceedings of ACM CSCW'10 Conference on Computer-Supported Cooperative Work
2010-02-06
p.107-116
Keywords: socialization, wikipedia, wikiproject
© Copyright 2010 ACM
Summary: Socialization of newcomers is critical both for conventional groups. It
helps groups perform effectively and the newcomers develop commitment. However,
little empirical research has investigated the impact of specific socialization
tactics on newcomers' commitment to online groups. We examined WikiProjects,
subgroups in Wikipedia organized around working on common topics or tasks. In
study 1, we identified the seven socialization tactics used most frequently:
invitations to join, welcome messages, requests to work on project-related
tasks, offers of assistance, positive feedback on a new member's work,
constructive criticism, and personal-related comments. In study 2, we examined
their impact on newcomers' commitment to the project. Whereas most newcomers
contributed fewer edits over time, the declines were slowed or reversed for
those socialized with welcome messages, assistance, and constructive criticism.
In contrast, invitations led to steeper declines in edits. These results
suggest that different socialization tactics play different roles in
socializing new members in online groups compared to offline ones.
[16]
Matching People And Groups: Recruitment And Selection In Online Games
Posters
/
Choi, Bo Reum
/
Kraut, Robert E.
/
Fichman, Mark
Proceedings of the 2008 AIS SIGHCI Workshop on HCI Research in MIS
2008-12-13
p.88
Keywords: Fit, MMOGs, Guilds, Players, Selection, Retention
Summary: Massively multiplayer online games (MMOGs) have great potential as sites for
research within the social and behavioral sciences and human-computer
interaction. This is because "guilds" -- semi-persistent groups in online games
-- are much like groups in real organizations. In this paper, we examine how
groups and individuals find appropriate matches and whether appropriate matches
lead newcomers to stay longer in their groups in an online game environment.
Results from archival data, observation, and survey in the game World of
Warcraft (WoW) indicate that different selection methods lead to person-group
fit for social and task-oriented characteristics and good fit leads recruits to
stay longer in their group. In particular, recruitment of new members to
task-oriented guilds was most successful when brief interactions were used
whereas recruitment to social-oriented guilds was most successful when
probationary periods and referrals were used.
[17]
Online spam-blog detection through blog search
Poster session 1/information retrieval
/
Zhu, Linhong
/
Sun, Aixin
/
Choi, Byron
Proceedings of the 2008 ACM Conference on Information and Knowledge
Management
2008-10-26
p.1347-1348
© Copyright 2008 ACM
Summary: In this work, we propose a novel post-indexing spam-blog (or splog)
detection method, which capitalizes on the results returned by blog search
engines. More specifically, we analyze the search results of a sequence of
temporally-ordered queries returned by a blog search engine, and build and
maintain Blog profiles for those blogs whose posts frequently appear in the
top-ranked search results. With the blog profiles, 4 splog scoring functions
were evaluated using real data collected from a popular blog search engine. Our
experiments show that the proposed method could effectively detect splogs with
a high accuracy.
[18]
On incremental maintenance of 2-hop labeling of graphs
XML I
/
Bramandia, Ramadhana
/
Choi, Byron
/
Ng, Wee Keong
Proceedings of the 2008 International Conference on the World Wide Web
2008-04-21
p.845-854
Keywords: 2-hop, graph indexing, incremental maintenance, reachability test
© Copyright 2008 International World Wide Web Conference Committee (IW3C2)
Summary: Recent interests on XML, Semantic Web, and Web ontology, among other topics,
have sparked a renewed interest on graph-structured databases. A fundamental
query on graphs is the reachability test of nodes. Recently, 2-hop labeling has
been proposed to index large collections of XML and/or graphs for efficient
reachability tests. However, there has been few work on updates of 2-hop
labeling. This is compounded by the fact that Web data changes over time. In
response to these, this paper studies the incremental maintenance of 2-hop
labeling. We identify the main reason for the inefficiency of updates of
existing 2-hop labels. We propose two updatable 2-hop labelings, hybrids of
2-hop labeling, and their incremental maintenance algorithms. The proposed
2-hop labeling is derived from graph connectivities, as opposed to set cover
which is used by all previous work. Our experimental evaluation illustrates the
space efficiency and update performance of various kinds of 2-hop labeling. The
main conclusion is that there is a natural way to spare some index size for
update performance in 2-hop labeling.
[19]
Culturability in Mobile Data Services: A Qualitative Study of the
Relationship Between Cultural Characteristics and User-Experience Attributes
/
Choi, Boreum
/
Lee, Inseong
/
Kim, Jinwoo
International Journal of Human-Computer Interaction
2006
v.20
n.3
p.171-203
© Copyright 2006 Lawrence Erlbaum Associates
Summary: As the use of mobile data services has spread across the globe, the effect
of cultural differences on user requirements has become an important issue. To
date, however, little research has been conducted on the role cultural factors
play in the design of mobile data services. This article proposes a set of
critical design attributes for mobile data services that takes cross-cultural
differences into account. To determine these attributes, a qualitative method
was devised and in-depth interviews in Korea, Japan, and Finland were
conducted. Twenty-one critical user-experience attributes that showed a clear
correlation with characteristics of the user's culture were found. The article
ends with a discussion of limitations and of implications for developers of
mobile data services.
[20]
A qualitative cross-national study of cultural influences on mobile data
service design
Small devices 2
/
Choi, Boreum
/
Lee, Inseong
/
Kim, Jinwoo
/
Jeon, Yunsuk
Proceedings of ACM CHI 2005 Conference on Human Factors in Computing Systems
2005-04-02
v.1
p.661-670
Summary: As the use of mobile data services has spread across the globe, the effect
of cultural differences on user requirements has become important issue. To
date, however, little research has been conducted on the role cultural factors
play in the design of mobile data services. This paper proposes a set of
critical design attributes for mobile data services that takes cross-cultural
differences into account. To determine these attributes, we devised a
qualitative method and conducted in-depth long interviews in Korea, Japan, and
Finland. We found 52 attributes considered important by mobile data service
users, and 11 critical attributes that showed a clear correlation with
characteristics of the user's culture. The paper concludes with a discussion of
limitations and of implications for developers of mobile data services.
[21]
Addressing a standards creation process: a focus on ebXML
ARTICLE
/
Choi, Beomjin
/
Raghu, T. S.
/
Vinze, Ajay
International Journal of Human-Computer Studies
2004
v.61
n.5
p.627-648
Keywords: e-Business standards; Standardization process; Standards body; Industry
consortium
© Copyright 2004 Elsevier B.V.
Summary: Current trends in e-business are creating opportunities for automation of
business processes across business boundaries. However, lack of standards has
caused difficulties for industry players in exploiting resources and
coordinating activities in the context of e-business. ebXML -- an emerging
e-business standard framework to unite competing factions under a banner of
international trade -- has been developed within an industry consortium using
an open, collaborative process with no barriers to entry, whose approach is
very different from traditional approach to create standards. Drawing on
socio-technological perspective, this paper attempts to gain deeper
understanding of such phenomenon by using a case study methodology. This paper
uses data drawn mostly from email discussions and minutes of teleconference and
face-to-face meeting. Our exploration of the ebXML standardization process
generates specific propositions. In summary, our analysis found that the
'openness' of standardization process helps to create a more comprehensive
standard than proprietary standards -- effectively leading to convergence of
technologies, and that the unfolding dynamics of standardization process varies
depending on the characteristics of standards to be developed. We also discuss
user participation as an important factor that influences the dynamics of
standardization process in such an open, collaborative standardization process.
Surprisingly, user participation seems to be more effective in creating
technical infrastructure oriented standards rather than business process
oriented standards.
[22]
Dream3D: Design and Implementation of an Online 3D Game Engine
Human factors and ergonomics
/
Park, T.-J.
/
Pyo, S. H.
/
Chu, C. W.
/
Ryu, S. W.
/
Kim, D.
/
Shim, K. H.
/
Choi, B. T.
Proceedings of the Tenth International Conference on Human-Computer
Interaction
2003-06-22
v.1
p.1011-1015
© Copyright 2003 Lawrence Erlbaum Associates
[23]
Test Bed System of Image-Based Rendering as VRML Extension
/
Kim, H.
/
Kim, S.
/
Koo, B.
/
Choi, B.
/
Oh, W.
Proceedings of the Ninth International Conference on Human-Computer
Interaction
2001-08
v.1
p.1012-1016
