Mapping online transportation service quality and multiclass classification problem solving priorities

Science.gov (United States)

Alamsyah, Andry; Rachmadiansyah, Imam

2018-03-01

Online transportation service is known for its accessibility, transparency, and tariff affordability. These points make online transportation have advantages over the existing conventional transportation service. Online transportation service is an example of disruptive technology that change the relationship between customers and companies. In Indonesia, there are high competition among online transportation provider, hence the companies must maintain and monitor their service level. To understand their position, we apply both sentiment analysis and multiclass classification to understand customer opinions. From negative sentiments, we can identify problems and establish problem-solving priorities. As a case study, we use the most popular online transportation provider in Indonesia: Gojek and Grab. Since many customers are actively give compliment and complain about company’s service level on Twitter, therefore we collect 61,721 tweets in Bahasa during one month observations. We apply Naive Bayes and Support Vector Machine methods to see which model perform best for our data. The result reveal Gojek has better service quality with 19.76% positive and 80.23% negative sentiments than Grab with 9.2% positive and 90.8% negative. The Gojek highest problem-solving priority is regarding application problems, while Grab is about unusable promos. The overall result shows general problems of both case study are related to accessibility dimension which indicate lack of capability to provide good digital access to the end users.

An examination of participation in online gambling activities and the relationship with problem gambling.

Science.gov (United States)

McCormack, Abby; Shorter, Gillian W; Griffiths, Mark D

2013-03-01

Background and aims Online gambling participation is increasing rapidly, with relatively little research about the possible effects of different gambling activities on problem gambling behaviour. The aim of this exploratory study was to examine the participation in online gambling activities and the relationship with problem gambling among an international sample of online gamblers. Methods An online gambling survey was posted on 32 international gambling websites and resulted in 1,119 respondents over a four-month period. Results Poker was the most popular gambling activity online. A number of online activities were associated with problem gambling, including: roulette, poker, horse race betting, sports betting, spread betting and fruit (slot) machines. Not surprisingly, those that gambled on these activities regularly (except poker) were more likely to be a problem gambler, however, what is interesting is that the reverse is true for poker players; those that gambled regularly on poker were less likely to be a problem gambler compared to the non-regular poker players. The majority of the players also gambled offline, but there was no relationship between problem gambling and whether or not a person also gambled offline. Discussion Problem gambling is associated more with certain online gambling activities than others, and those gambling on two or more activities online were more likely to be a problem gambler. Conclusion This paper can help explain the impact different online gambling activities may have on gambling behaviour. Consideration needs to be given to the gambling activity when developing and implementing treatment programmes.

The SAMPLE experience: The development of a rich media online mathematics learning environment

OpenAIRE

Chang, Jen

2006-01-01

This report documents the development of Sample Architecture for Mathematically Productive Learning Experiences (SAMPLE), a rich media, online, mathematics learning environment created to meet the needs of middle school educators. It explores some of the current pedagogical challenges in mathematics education, and their amplified impacts when coupled with under-prepared teachers, a decidedly wide-spread phenomenon. The SAMPLE publishing experience is discussed in terms of its instructional de...

Digital literacy and problem solving in technology-rich environments

Directory of Open Access Journals (Sweden)

Vesna Dolničar

2015-07-01

Full Text Available Rapid development and progress, as well as the growing presence of information and communications technologies dictate the need for more highly developed digital skills in individuals. The paper focuses on the concepts of digital skills and problem solving in technology-rich environments. It examines these on the basis of empirical data obtained in the international study PIAAC. The introductory part presents an overview of the literature and the results of previous research in the field of measurement of digital skills, and data on the use of information society services among the EU Member States. The second part of the article refers to the results obtained in the study PIAAC. The results, confirmed by the results of other studies, showed the impact of age and education level on the problem solving in technology-rich environments. Article concludes with suggestions for improving the current state of integration of all population groups in training programs in the field of digital skills.

An Examination of High School Students' Online Engagement in Mathematics Problems

Science.gov (United States)

Lim, Woong; Son, Ji-Won; Gregson, Susan; Kim, Jihye

2018-01-01

This article examines high school students' engagement in a set of trigonometry problems. Students completed this task independently in an online environment with access to Internet search engines, online textbooks, and YouTube videos. The findings imply that students have the resourcefulness to solve procedure-based mathematics problems in an…

Advice Complexity of the Online Search Problem

DEFF Research Database (Denmark)

Clemente, Jhoirene; Hromkovič, Juraj; Komm, Dennis

2016-01-01

the minimum amount of information needed in order to achieve a certain competitive ratio. We design an algorithm that reads $b$ bits of advice and achieves a competitive ratio of (M/m)^{1/(2^b+1)} where M and m are the maximum and minimum price in the input. We also give a matching lower bound. Furthermore......The online search problem is a fundamental problem in finance. The numerous direct applications include searching for optimal prices for commodity trading and trading foreign currencies. In this paper, we analyze the advice complexity of this problem. In particular, we are interested in identifying......, we compare the power of advice and randomization for this problem....

The on-line asymmetric traveling salesman problem

NARCIS (Netherlands)

Ausiello, G.; Bonifaci, V.; Laura, L.

2008-01-01

We consider two on-line versions of the asymmetric traveling salesman problem with triangle inequality. For the homing version, in which the salesman is required to return in the city where it started from, we give a -competitive algorithm and prove that this is best possible. For the nomadic

Heuristic for Stochastic Online Flowshop Problem with Preemption Penalties

Directory of Open Access Journals (Sweden)

Mohammad Bayat

2013-01-01

Full Text Available The deterministic flowshop model is one of the most widely studied problems; whereas its stochastic equivalent has remained a challenge. Furthermore, the preemptive online stochastic flowshop problem has received much less attention, and most of the previous researches have considered a nonpreemptive version. Moreover, little attention has been devoted to the problems where a certain time penalty is incurred when preemption is allowed. This paper examines the preemptive stochastic online flowshop with the objective of minimizing the expected makespan. All the jobs arrive overtime, which means that the existence and the parameters of each job are unknown until its release date. The processing time of the jobs is stochastic and actual processing time is unknown until completion of the job. A heuristic procedure for this problem is presented, which is applicable whenever the job processing times are characterized by their means and standard deviation. The performance of the proposed heuristic method is explored using some numerical examples.

Tracking online poker problem gamblers with player account-based gambling data only.

Science.gov (United States)

Luquiens, Amandine; Tanguy, Marie-Laure; Benyamina, Amine; Lagadec, Marthylle; Aubin, Henri-Jean; Reynaud, Michel

2016-12-01

The aim was to develop and validate an instrument to track online problem poker gamblers with player account-based gambling data (PABGD). We emailed an invitation to all active poker gamblers on the online gambling service provider Winamax. The 14,261 participants completed the Problem Gambling Severity Index (PGSI). PGSI served as a gold standard to track problem gamblers (i.e., PGSI ≥ 5). We used a stepwise logistic regression to build a predictive model of problem gambling with PABGD, and validated it. Of the sample 18% was composed of online poker problem gamblers. The risk factors of problem gambling included in the predictive model were being male, compulsive, younger than 28 years, making a total deposit > 0 euros, having a mean loss per gambling session > 1.7 euros, losing a total of > 45 euros in the last 30 days, having a total stake > 298 euros, having > 60 gambling sessions in the last 30 days, and multi-tabling. The tracking instrument had a sensitivity of 80%, and a specificity of 50%. The quality of the instrument was good. This study illustrates the feasibility of a method to develop and validate instruments to track online problem gamblers with PABGD only. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

Reconstruction and calibration strategies for the LHCb RICH detector

CERN Multimedia

2006-01-01

- LHCb particle identification - LHCb ring pattern recognition algorithm requirements - RICH pattern recognition - Cherenkov angle reconstruction online - Online PID - Hough transform - Metropolis- Hastings Markov chains - PID online: physics performances - Rich PID Callibration

Group Work Tests for Context-Rich Problems

Science.gov (United States)

Meyer, Chris

2016-05-01

The group work test is an assessment strategy that promotes higher-order thinking skills for solving context-rich problems. With this format, teachers are able to pose challenging, nuanced questions on a test, while providing the support weaker students need to get started and show their understanding. The test begins with a group discussion phase, when students are given a "number-free" version of the problem. This phase allows students to digest the story-like problem, explore solution ideas, and alleviate some test anxiety. After 10-15 minutes of discussion, students inform the instructor of their readiness for the individual part of the test. What follows next is a pedagogical phase change from lively group discussion to quiet individual work. The group work test is a natural continuation of the group work in our daily physics classes and helps reinforce the importance of collaboration. This method has met with success at York Mills Collegiate Institute, in Toronto, Ontario, where it has been used consistently for unit tests and the final exam of the grade 12 university preparation physics course.

Impact of Context-Rich, Multifaceted Problems on Students' Attitudes Towards Problem-Solving

Science.gov (United States)

Ogilvie, Craig

2008-04-01

Young scientists and engineers need strong problem-solving skills to enable them to address the broad challenges they will face in their careers. These challenges will likely be ill-defined and open-ended with either unclear goals, insufficient constraints, multiple possible solutions, and different criteria for evaluating solutions so that our young scientists and engineers must be able to make judgments and defend their proposed solutions. In contrast, many students believe that problem-solving is being able to apply set procedures or algorithms to tasks and that their job as students is to master an ever-increasing list of procedures. This gap between students' beliefs and the broader, deeper approaches of experts is a strong barrier to the educational challenge of preparing students to succeed in their future careers. To start to address this gap, we have used multi-faceted, context-rich problems in a sophomore calculus-based physics course. To assess whether there was any change in students' attitudes or beliefs towards problem-solving, students were asked to reflect on their problem-solving at the beginning and at the end of the semester. These reflections were coded as containing one or more problem-solving ideas. The change in students' beliefs will be shown in this talk.

VET workers problem-solving skills in technology-rich environments: European approach

OpenAIRE

Hämäläinen, Raija

2014-01-01

The European workplace is challenging VET adults problem-solving skills in technology-rich environments (TREs). So far, no international large-scale assessment data has been available for VET. The PIAAC data comprise the most comprehensive source of information on adults skills to date. The present study (N=50 369) focuses on gaining insight into the problem-solving skills in TREs of adults with a VET background. When examining the similarities and differences in VET adults problem-solving sk...

VET workers’ problem-solving skills in technology-rich environments: European approach

OpenAIRE

Hämäläinen, Raija; Cincinnato, Sebastiano; Malin, Antero; De Wever, Bram

2014-01-01

The European workplace is challenging VET adults’ problem-solving skills in technology-rich environments (TREs). So far, no international large-scale assessment data has been available for VET. The PIAAC data comprise the most comprehensive source of information on adults’ skills to date. The present study (N=50 369) focuses on gaining insight into the problem-solving skills in TREs of adults with a VET background. When examining the similarities and differences in VET adults’ problem-solving...

A Problem in Online Interpersonal Skills Training: Do Learners Practice Skills?

Science.gov (United States)

Doo, Min Young

2006-01-01

One problem found when teaching interpersonal skills online is learners' lack of opportunity for skill practice. The online learning environment is deficient in face-to-face interaction, and opportunities for self-regulation make it difficult to ensure learners practice skills despite the positive effects of such practice on skill improvement. The…

A Rich Vehicle Routing Problem with Multiple Trips and Driver Shifts

OpenAIRE

Arda, Yasemin; Crama, Yves; Kucukaydin, Hande; Talla Nobibon, Fabrice

2012-01-01

This study is concerned with a rich vehicle routing problem (RVRP) encountered at a Belgian transportation company in charge of servicing supermarkets and hypermarkets belonging to a franchise. The studied problem can be classified as a one-to-many-to-one pick-up and delivery problem, where there is a single depot from which all delivery customers are served and to which every pick-up demand must be carried back (Gutiérrez-Jarpa et al., 2010). The delivery and backhaul customers are considere...

Dimensions of Problem Based Learning--Dialogue and Online Collaboration in Projects

Science.gov (United States)

Andreasen,, Lars Birch; Nielsen, Jørgen Lerche

2013-01-01

The article contributes to the discussions on problem based learning and project work, building on and reflecting the experiences of the authors. Four perspectives are emphasized as central to a contemporary approach to problem- and project-based learning: the exploration of problems, projects as a method, online collaboration, and the dialogic…

An approach to enrich online medical Problem-Based Learning with tacit healthcare knowledge.

Science.gov (United States)

Cheah, Yu-N; Rashid, Faridah Abdul; Abidi, Syed Sibte Raza

2003-01-01

Existing Problem-Based Learning (PBL) problems, though suitable in their own right for teaching purposes, are limited in their potential to evolve by themselves and to create new knowledge. Presently, they are based on textbook examples of past cases and/or cases that have been transcribed by a clinician. In this paper, we present (a) a tacit healthcare knowledge representation formalism called Healthcare Scenarios, (b) the relevance of healthcare scenarios in PBL in healthcare and medicine, (c) a novel PBL-Scenario-based tacit knowledge explication strategy and (d) an online PBL Problem Composer and Presenter (PBL-Online) to facilitate the acquisition and utilisation of expert-quality tacit healthcare knowledge to enrich online PBL. We employ a confluence of healthcare knowledge management tools and Internet technologies to bring tacit healthcare knowledge-enriched PBL to a global and yet more accessible level.

How Does Early Feedback in an Online Programming Course Change Problem Solving?

Science.gov (United States)

Ebrahimi, Alireza

2012-01-01

How does early feedback change the programming problem solving in an online environment and help students choose correct approaches? This study was conducted in a sample of students learning programming in an online course entitled Introduction to C++ and OOP (Object Oriented Programming) using the ANGEL learning management system platform. My…

Effectiveness of an Online Social Constructivist Mathematical Problem Solving Course for Malaysian Pre-Service Teachers

Directory of Open Access Journals (Sweden)

Kim-Leong Lai

2009-07-01

Full Text Available This study assessed the effectiveness of an online mathematical problem solving course designed using a social constructivist approach for pre-service teachers. Thirty-seven pre-service teachers at the Batu Lintang Teacher Institute, Sarawak, Malaysia were randomly selected to participate in the study. The participants were required to complete the course online without the typical face-to-face classes and they were also required to solve authentic mathematical problems in small groups of 4-5 participants based on the Polya’s Problem Solving Model via asynchronous online discussions. Quantitative and qualitative methods such as questionnaires and interviews were used to evaluate the effects of the online learning course. Findings showed that a majority of the participants were satisfied with their learning experiences in the course. There were no significant changes in the participants’ attitudes toward mathematics, while the participants’ skills in problem solving for “understand the problem” and “devise a plan” steps based on the Polya Model were significantly enhanced, though no improvement was apparent for “carry out the plan” and “review”. The results also showed that there were significant improvements in the participants’ critical thinking skills. Furthermore, participants with higher initial computer skills were also found to show higher performance in mathematical problem solving as compared to those with lower computer skills. However, there were no significant differences in the participants’ achievements in the course based on gender. Generally, the online social constructivist mathematical problem solving course is beneficial to the participants and ought to be given the attention it deserves as an alternative to traditional classes. Nonetheless, careful considerations need to be made in the designing and implementing of online courses to minimize problems that participants might encounter while

VET Workers' Problem-Solving Skills in Technology-Rich Environments: European Approach

Science.gov (United States)

Hämäläinen, Raija; Cincinnato, Sebastiano; Malin, Antero; De Wever, Bram

2014-01-01

The European workplace is challenging VET adults' problem-solving skills in technology-rich environments (TREs). So far, no international large-scale assessment data has been available for VET. The PIAAC data comprise the most comprehensive source of information on adults' skills to date. The present study (N = 50 369) focuses on gaining insight…

Learner Perspectives of Online Problem-Based Learning and Applications from Cognitive Load Theory

Science.gov (United States)

Chen, Ruth

2016-01-01

Problem-based learning (PBL) courses have historically been situated in physical classrooms involving in-person interactions. As online learning is embraced in higher education, programs that use PBL can integrate online platforms to support curriculum delivery and facilitate student engagement. This report describes student perspectives of the…

Problem Based Learning Online

DEFF Research Database (Denmark)

Kolbæk, Ditte

2018-01-01

“How do two online learning designs affect student engagement in the PBL online modules?” The empirical data were collected and analyzed using a netnographic approach. The study finds that concepts such as self-directed learning and active involvement may be perceived very differently from the students...

Effect on behavior problems of teen online problem-solving for adolescent traumatic brain injury.

Science.gov (United States)

Wade, Shari L; Walz, Nicolay C; Carey, Joanne; McMullen, Kendra M; Cass, Jennifer; Mark, Erin; Yeates, Keith Owen

2011-10-01

To report the results of a randomized clinical trial of teen online problem-solving (TOPS) meant to improve behavioral outcomes of adolescents with traumatic brain injury (TBI). A randomized clinical trial was conducted to compare the efficacy of TOPS with access to Internet resources in teenagers with TBI in improving parent and self-reported behavior problems and parent-teen conflicts. Participants included 41 adolescents aged 11 to 18 years (range: 11.47-17.90 years) who had sustained a moderate-to-severe TBI between 3 and 19 months earlier. Teens in the TOPS group received 10 to 14 online sessions that provided training in problem-solving, communication skills, and self-regulation. Outcomes were assessed before treatment and at a follow-up assessment an average of 8 months later. Groups were compared on follow-up scores after we controlled for pretreatment levels. Injury severity and socioeconomic status were examined as potential moderators of treatment efficacy. Forty-one participants provided consent and completed baseline assessments, and follow-up assessments were completed for 35 participants (16 TOPS, 19 Internet resource comparison). The TOPS group reported significantly less parent-teen conflict at follow-up than did the Internet-resource-comparison group. Improvements in teen behavior after TOPS were moderated by injury severity; there were greater improvements in the teens' internalizing symptoms after TOPS among adolescents with severe TBI. Family socioeconomic status also moderated the efficacy of TOPS in improving behavior problems reported by both parents and teens, although the nature of the moderation effects varied. Our findings suggest that TOPS contributes to improvements in parent-teen conflict generally and parent and self-reported teen behavior problems for certain subsets of participants.

Middle-School Students' Online Information Problem Solving Behaviors on the Information Retrieval Interface

Science.gov (United States)

Yeh, Yi-Fen; Hsu, Ying-Shao; Chuang, Fu-Tai; Hwang, Fu-Kwun

2014-01-01

With the near-overload of online information, it is necessary to equip our students with the skills necessary to deal with Information Problem Solving (IPS). This study also intended to help students develop major IPS strategies with the assistance of an instructor's scaffolding in a designed IPS course as well as on an Online Information…

Effect on Behavior Problems of Teen Online Problem-Solving for Adolescent Traumatic Brain Injury

Science.gov (United States)

Walz, Nicolay C.; Carey, JoAnne; McMullen, Kendra M.; Cass, Jennifer; Mark, Erin; Yeates, Keith Owen

2011-01-01

PURPOSE: To report the results of a randomized clinical trial of teen online problem-solving (TOPS) meant to improve behavioral outcomes of adolescents with traumatic brain injury (TBI). METHODS: A randomized clinical trial was conducted to compare the efficacy of TOPS with access to Internet resources in teenagers with TBI in improving parent and self-reported behavior problems and parent-teen conflicts. Participants included 41 adolescents aged 11 to 18 years (range: 11.47–17.90 years) who had sustained a moderate-to-severe TBI between 3 and 19 months earlier. Teens in the TOPS group received 10 to 14 online sessions that provided training in problem-solving, communication skills, and self-regulation. Outcomes were assessed before treatment and at a follow-up assessment an average of 8 months later. Groups were compared on follow-up scores after we controlled for pretreatment levels. Injury severity and socioeconomic status were examined as potential moderators of treatment efficacy. RESULTS: Forty-one participants provided consent and completed baseline assessments, and follow-up assessments were completed for 35 participants (16 TOPS, 19 Internet resource comparison). The TOPS group reported significantly less parent-teen conflict at follow-up than did the Internet-resource-comparison group. Improvements in teen behavior after TOPS were moderated by injury severity; there were greater improvements in the teens' internalizing symptoms after TOPS among adolescents with severe TBI. Family socioeconomic status also moderated the efficacy of TOPS in improving behavior problems reported by both parents and teens, although the nature of the moderation effects varied. CONCLUSION: Our findings suggest that TOPS contributes to improvements in parent-teen conflict generally and parent and self-reported teen behavior problems for certain subsets of participants. PMID:21890828

Using Jigsaw-Style Spectroscopy Problem-Solving to Elucidate Molecular Structure through Online Cooperative Learning

Science.gov (United States)

Winschel, Grace A.; Everett, Renata K.; Coppola, Brian P.; Shultz, Ginger V.

2015-01-01

Cooperative learning was employed as an instructional approach to facilitate student development of spectroscopy problem solving skills. An interactive online environment was used as a framework to structure weekly discussions around spectroscopy problems outside of class. Weekly discussions consisted of modified jigsaw-style problem solving…

Adaptive Reactive Rich Internet Applications

Science.gov (United States)

Schmidt, Kay-Uwe; Stühmer, Roland; Dörflinger, Jörg; Rahmani, Tirdad; Thomas, Susan; Stojanovic, Ljiljana

Rich Internet Applications significantly raise the user experience compared with legacy page-based Web applications because of their highly responsive user interfaces. Although this is a tremendous advance, it does not solve the problem of the one-size-fits-all approach1 of current Web applications. So although Rich Internet Applications put the user in a position to interact seamlessly with the Web application, they do not adapt to the context in which the user is currently working. In this paper we address the on-the-fly personalization of Rich Internet Applications. We introduce the concept of ARRIAs: Adaptive Reactive Rich Internet Applications and elaborate on how they are able to adapt to the current working context the user is engaged in. An architecture for the ad hoc adaptation of Rich Internet Applications is presented as well as a holistic framework and tools for the realization of our on-the-fly personalization approach. We divided both the architecture and the framework into two levels: offline/design-time and online/run-time. For design-time we explain how to use ontologies in order to annotate Rich Internet Applications and how to use these annotations for conceptual Web usage mining. Furthermore, we describe how to create client-side executable rules from the semantic data mining results. We present our declarative lightweight rule language tailored to the needs of being executed directly on the client. Because of the event-driven nature of the user interfaces of Rich Internet Applications, we designed a lightweight rule language based on the event-condition-action paradigm.2 At run-time the interactions of a user are tracked directly on the client and in real-time a user model is built up. The user model then acts as input to and is evaluated by our client-side complex event processing and rule engine.

Internet skill-related problems in accessing online health information and services

NARCIS (Netherlands)

van Deursen, Alexander Johannes Aloysius Maria

2012-01-01

Purpose Despite the amount of health information available online, there are several barriers that limit the Internet from being adopted as a source of health information. The purpose of this study was to identify individual skill-related problems that users experience when accessing the Internet

Problem solving strategies used by RN-to-BSN students in an online problem-based learning course.

Science.gov (United States)

Oldenburg, Nancy L; Hung, Wei-Chen

2010-04-01

It is essential that nursing students develop the problem solving and critical thinking skills required in the current health care environment. Problem-based learning has been promoted as a way to help students acquire those skills; however, gaps exist in the knowledge base of the strategies used by learners. The purpose of this case study was to gain insight into the problem solving experience of a group of six RN-to-BSN students in an online problem-based learning course. Data, including discussion transcripts, reflective papers, and interview transcripts, were analyzed using a qualitative approach. Students expanded their use of resources and resolved the cases, identifying relevant facts and clinical applications. They had difficulty communicating their findings, establishing the credibility of sources, and offering challenging feedback. Increased support and direction are needed to facilitate the development of problem solving abilities of students in the problem-based learning environment.

Primary school students’ strategies in early algebra problem solving supported by an online game

NARCIS (Netherlands)

van den Heuvel-Panhuizen, M.H.A.M; Kolovou, A.; Robitzsch, A.

2013-01-01

In this study we investigated the role of a dynamic online game on students’ early algebra problem solving. In total 253 students from grades 4, 5, and 6 (10–12 years old) used the game at home to solve a sequence of early algebra problems consisting of contextual problems addressing covarying

Modelling human problem solving with data from an online game.

Science.gov (United States)

Rach, Tim; Kirsch, Alexandra

2016-11-01

Since the beginning of cognitive science, researchers have tried to understand human strategies in order to develop efficient and adequate computational methods. In the domain of problem solving, the travelling salesperson problem has been used for the investigation and modelling of human solutions. We propose to extend this effort with an online game, in which instances of the travelling salesperson problem have to be solved in the context of a game experience. We report on our effort to design and run such a game, present the data contained in the resulting openly available data set and provide an outlook on the use of games in general for cognitive science research. In addition, we present three geometrical models mapping the starting point preferences in the problems presented in the game as the result of an evaluation of the data set.

Randomized Clinical Trial of Online Parent Training for Behavior Problems After Early Brain Injury.

Science.gov (United States)

Wade, Shari L; Cassedy, Amy E; Shultz, Emily L; Zang, Huaiyu; Zhang, Nanhua; Kirkwood, Michael W; Stancin, Terry; Yeates, Keith O; Taylor, H Gerry

2017-11-01

To evaluate the effectiveness of Internet-based Interacting Together Everyday: Recovery After Childhood TBI (I-InTERACT) versus abbreviated parent training (Express) or access to online resources (internet resources comparison [IRC]) in improving parenting skills and decreasing behavior problems after early traumatic brain injury (TBI). In this randomized, controlled, clinical trial, 113 children 3 to 9 years old previously hospitalized for moderate to severe TBI were randomly assigned to receive Express (n = 36), I-InTERACT (n = 39), or IRC (n = 38). Express included 7 online parent skills sessions, and I-InTERACT delivered 10 to 14 sessions addressing parenting skills, TBI education, stress, and anger management. The 2 interventions coupled online modules with therapist coaching through a Health Insurance Portability and Accountability Act-compliant Skype link. The IRC group received access to online TBI and parent skills resources. Co-primary outcomes were blinded ratings of parenting skills and parent report of behavior problems and problem intensity on the Eyberg Child Behavior Inventory (ECBI). Outcomes were assessed before treatment and 3 and 6 months after treatment, with the latter constituting the primary endpoint. The Express and I-InTERACT groups displayed higher levels of positive parenting at follow-up. Only the I-InTERACT group had lower levels of negative parenting at 6 months. The Express group had lower ECBI intensity scores than the IRC group. Baseline symptom levels moderated improvements; children in the Express and I-InTERACT groups with higher baseline symptoms demonstrated greater improvements than those in the IRC group. Changes in parenting skills mediated improvements in behavior in those with higher baseline symptoms. Brief online parent skills training can effectively decrease behavior problems after early TBI in children with existing behavioral symptoms. Clinical trial registration information-Internet-based Interacting Together

VET workers’ problem-solving skills in technology-rich environments: European approach

Directory of Open Access Journals (Sweden)

Raija Hämäläinen

2014-08-01

Full Text Available The European workplace is challenging VET adults’ problem-solving skills in technology-rich environments (TREs. So far, no international large-scale assessment data has been available for VET. The PIAAC data comprise the most comprehensive source of information on adults’ skills to date. The present study (N=50 369 focuses on gaining insight into the problem-solving skills in TREs of adults with a VET background. When examining the similarities and differences in VET adults’ problem-solving skills in TREs across 11 European countries, two main trends can be observed. First, our results show that only a minority of VET adults perform at a high level. Second, there seems to be substantial variation between countries with respect to the proportion of VET adults that can be identified as “at-risk” or “weak” performers. For the future, our findings indicate the variations that can be used as a starting point to identify beneficial VET approaches.

A randomized trial of teen online problem solving: efficacy in improving caregiver outcomes after brain injury.

Science.gov (United States)

Wade, Shari L; Walz, Nicolay C; Carey, JoAnne; McMullen, Kendra M; Cass, Jennifer; Mark, Erin; Yeates, Keith Owen

2012-11-01

To examine the results of a randomized clinical trial (RCT) of Teen Online Problem Solving (TOPS), an online problem solving therapy model, in increasing problem-solving skills and decreasing depressive symptoms and global distress for caregivers of adolescents with traumatic brain injury (TBI). Families of adolescents aged 11-18 who sustained a moderate to severe TBI between 3 and 19 months earlier were recruited from hospital trauma registries. Participants were assigned to receive a web-based, problem-solving intervention (TOPS, n = 20), or access to online resources pertaining to TBI (Internet Resource Comparison; IRC; n = 21). Parent report of problem solving skills, depressive symptoms, global distress, utilization, and satisfaction were assessed pre- and posttreatment. Groups were compared on follow-up scores after controlling for pretreatment levels. Family income was examined as a potential moderator of treatment efficacy. Improvement in problem solving was examined as a mediator of reductions in depression and distress. Forty-one participants provided consent and completed baseline assessments, with follow-up assessments completed on 35 participants (16 TOPS and 19 IRC). Parents in both groups reported a high level of satisfaction with both interventions. Improvements in problem solving skills and depression were moderated by family income, with caregivers of lower income in TOPS reporting greater improvements. Increases in problem solving partially mediated reductions in global distress. Findings suggest that TOPS may be effective in improving problem solving skills and reducing depressive symptoms for certain subsets of caregivers in families of adolescents with TBI.

Problems about online shopping and strategies%网购存在的问题及其对策

Institute of Scientific and Technical Information of China (English)

赵晓妮

2011-01-01

通过对当前网购状况的分析，认为网购中卖家的诚信问题、网络支付存在安全隐患、售后服务和物流服务相对滞后是常见的3个问题；而网购的运营模式不够完善、网络安全问题突出和物流服务相对滞后是导致问题的主要原因，并指出买家培养良好的网购习惯、政府管理部门和网站联合加强网购交易的安保措施、制定专门的相关法律为网购提供法律保障是解决这些问题的有效措施。%How to avoid the risk of the online shopping problems are worth paying attention to. This paper argues the existing three problems on online shopping, such as the seller＇s problems about lack of honesty in the process of online shopping;online payment security risks; after-sales service and logistics services. The author finds that the main causes are the shopping model is not perfect, network security issues are not reliable and logistics services lags behind. After analyzing the reasons about the problems, the paper points out that there are three effective measures to solve these problems： buyers should have a good habits about online shopping; the administrative departments of government and the webs of should enhance online trade security, and the government developments should lay down the special laws for the online shopping.

A Meta-Analytic and Qualitative Review of Online versus Face-to-Face Problem-Based Learning

Science.gov (United States)

Jurewitsch, Brian

2012-01-01

Problem-based learning (PBL) is an instructional strategy that is poised for widespread application in the current, growing, on-line digital learning environment. While enjoying a track record as a defensible strategy in face-to-face learning settings, the research evidence is not clear regarding PBL in on-line environments. A review of the…

The Effects of Peer-Controlled or Moderated Online Collaboration on Group Problem Solving and Related Attitudes

Directory of Open Access Journals (Sweden)

Ke Zhang

2003-10-01

Full Text Available Abstract. This study investigated the relative benefits of peer-controlled and moderated online collaboration during group problem solving. Thirty-five self-selected groups of four or five students were randomly assigned to the two conditions, which used the same online collaborative tool to solve twelve problem scenarios in an undergraduate statistics course. A score for the correctness of the solutions and a reasoning score were analyzed. A survey was administered to reveal differences in students' related attitudes. Three conclusions were reached: 1. Groups assigned to moderated forums displayed significantly higher reasoning scores than those in the peer-controlled condition, but the moderation did not affect correctness of solutions. 2. Students in the moderated forums reported being more likely to choose to use an optional online forum for future collaborations. 3. Students who reported having no difficulty during collaboration reported being more likely to choose to use an optional online forum in the future.

Primary School Students' Strategies in Early Algebra Problem Solving Supported by an Online Game

Science.gov (United States)

van den Heuvel-Panhuizen, Marja; Kolovou, Angeliki; Robitzsch, Alexander

2013-01-01

In this study we investigated the role of a dynamic online game on students' early algebra problem solving. In total 253 students from grades 4, 5, and 6 (10-12 years old) used the game at home to solve a sequence of early algebra problems consisting of contextual problems addressing covarying quantities. Special software monitored the…

How Much is Location Information Worth? A Competitive Analysis of the Online Traveling Salesman Problem with Two Disclosure Dates

NARCIS (Netherlands)

F.J. Srour (Jordan); R.A. Zuidwijk (Rob)

2008-01-01

textabstractIn this paper we derive the worst-case ratio of an online algorithm for the Traveling Salesman Problem (TSP) with two disclosure dates. This problem, a variant of the online TSP with release dates, is characterized by the disclosure of a job’s location at one point in time followed by

Online and Mobile Interventions for Problem Gambling, Alcohol, and Drugs: A Systematic Review.

Science.gov (United States)

Giroux, Isabelle; Goulet, Annie; Mercier, Jonathan; Jacques, Christian; Bouchard, Stéphane

2017-01-01

Online interventions for gambling, alcohol, and illegal drug related problems have been developing at a fast pace over the past decade. Yet, little is known about the content and efficacy of interventions provided entirely online for reducing drug/alcohol use and gambling, or about the characteristics of those who use these interventions. This systematic review aims to describe the characteristics of online interventions, their efficacy, and the profile of their clientele. Documentation was mainly obtained through four scientific databases in psychology, technology, and medical research (PsychINFO, MedLine, Francis, and INSPEC) using three keywords (substances or gambling, intervention, Internet). Of the 4,708 documents initially identified, 18 studies meeting admissibility criteria were retained and analyzed after exclusion of duplicates and non-relevant documents. No study in the review related to problem gambling. The majority of interventions were based upon motivational or cognitive-behavioral theoretical approaches and called upon well-established therapeutic components in the field of addictions. The participants in these studies were generally adults between 30 and 46 years old with a high school education and presenting a high risk or problematic use. More than three quarters of the studies showed a short-term decrease in use that was maintained 6 months later, but only two studies included a 12 months follow-up. Online interventions seem promising and appear to meet the needs of participants who are in the workforce and seeking help for the first time. Long-term efficacy studies should nonetheless be conducted.

Preventing anxiety problems in children with Cool Little Kids Online: study protocol for a randomised controlled trial.

Science.gov (United States)

Morgan, Amy J; Rapee, Ronald M; Tamir, Elli; Goharpey, Nahal; Salim, Agus; McLellan, Lauren F; Bayer, Jordana K

2015-11-05

Anxiety disorders are the most common type of mental health problem and begin early in life. Early intervention to prevent anxiety problems in young children who are at risk has the potential for long-term impact. The 'Cool Little Kids' parenting group program was previously established to prevent anxiety disorders in young children at risk because of inhibited temperament. This group program was efficacious in two randomised controlled trials and has recently been adapted into an online format. 'Cool Little Kids Online' was developed to widen and facilitate access to the group program's preventive content. A pilot evaluation of the online program demonstrated its perceived utility and acceptability among parents. This study aims to evaluate the efficacy of Cool Little Kids Online in a large randomised controlled trial. Parents of young children who are 3-6 years old and who have an inhibited temperament will be recruited (n = 385) and randomly assigned to either immediate access to Cool Little Kids Online or delayed access after a waiting period of 24 weeks. The online program contains eight modules that help parents address key issues in the development of anxiety problems in inhibited children, including children's avoidant coping styles, overprotective parenting behaviours, and parents' own fears and worries. Intervention participants will be offered clinician support when requested. The primary outcome will be change in parent-reported child anxiety symptoms. Secondary outcomes will be child internalising symptoms, child and family life interference due to anxiety, over-involved/protective parenting, plus child anxiety diagnoses assessed by using a new online diagnostic tool. Assessments will take place at baseline and 12 and 24 weeks after baseline. This trial expands upon previous research on the Cool Little Kids parenting group program and will evaluate the efficacy of online delivery. Online delivery of the program could result in an easily accessible

Effects of Online Problem-Based Learning on Teachers' Technology Perceptions and Planning

Science.gov (United States)

Nelson, Erik T.

2007-01-01

The purpose of this qualitative study was to examine the ways in which the experience of learning through an online problem-based learning (PBL) model affect teachers' perceptions of integrating technology. Participant reflections were collected and analyzed to identify the pros, cons, and challenges of learning technology integration through this…

Competitive Analysis for Online Leasing Problem with Compound Interest Rate

OpenAIRE

Yang, Xingyu; Zhang, Weiguo; Xu, Weijun; Zhang, Yong

2011-01-01

We introduce the compound interest rate into the continuous version of the online leasing problem and discuss the generalized model by competitive analysis. On the one hand, the optimal deterministic strategy and its competitive ratio are obtained; on the other hand, a nearly optimal randomized strategy is constructed and a lower bound for the randomized competitive ratios is proved by Yao's principle. With the help of numerical examples, the theoretical results show that the interest rate pu...

Problems and Pitfalls in Setting Up and Operating an Online Information Service.

Science.gov (United States)

Moureau, Magdeleine L.

1978-01-01

Physical, economic, technical, and social constraints are analyzed in the case of the online vendor, and each component in the chain is considered separately. The user's problems are analyzed from the viewpoint of both the intermediary and the end user, and the effect of the changeover to a new system is considered. (Author)

Online and Mobile Interventions for Problem Gambling, Alcohol, and Drugs: A Systematic Review

Directory of Open Access Journals (Sweden)

Isabelle Giroux

2017-06-01

Full Text Available Online interventions for gambling, alcohol, and illegal drug related problems have been developing at a fast pace over the past decade. Yet, little is known about the content and efficacy of interventions provided entirely online for reducing drug/alcohol use and gambling, or about the characteristics of those who use these interventions. This systematic review aims to describe the characteristics of online interventions, their efficacy, and the profile of their clientele. Documentation was mainly obtained through four scientific databases in psychology, technology, and medical research (PsychINFO, MedLine, Francis, and INSPEC using three keywords (substances or gambling, intervention, Internet. Of the 4,708 documents initially identified, 18 studies meeting admissibility criteria were retained and analyzed after exclusion of duplicates and non-relevant documents. No study in the review related to problem gambling. The majority of interventions were based upon motivational or cognitive-behavioral theoretical approaches and called upon well-established therapeutic components in the field of addictions. The participants in these studies were generally adults between 30 and 46 years old with a high school education and presenting a high risk or problematic use. More than three quarters of the studies showed a short-term decrease in use that was maintained 6 months later, but only two studies included a 12 months follow-up. Online interventions seem promising and appear to meet the needs of participants who are in the workforce and seeking help for the first time. Long-term efficacy studies should nonetheless be conducted.

Counting to 20: Online Implementation of a Face-to-Face, Elementary Mathematics Methods Problem-Solving Activity

Science.gov (United States)

Schwartz, Catherine Stein

2012-01-01

This study describes implementation of the same problem-solving activity in both online and face-to-face environments. The activity, done in the first class period or first module of a K-2 mathematics methods course, was initially used in a face-to-face class and then adapted later for use in an online class. While the task was originally designed…

Technology Confidence, Competence and Problem Solving Strategies: Differences within Online and Face-to-Face Formats

Science.gov (United States)

Peterson, Sharon L.; Palmer, Louann Bierlein

2011-01-01

This study identified the problem solving strategies used by students within a university course designed to teach pre-service teachers educational technology, and whether those strategies were influenced by the format of the course (i.e., face-to-face computer lab vs. online). It also examined to what extent the type of problem solving strategies…

Online Peer-to-Peer Support for Young People With Mental Health Problems: A Systematic Review

OpenAIRE

Ali, Kathina; Farrer, Louise; Gulliver, Amelia; Griffiths, Kathleen M

2015-01-01

Background Adolescence and early adulthood are critical periods for the development of mental disorders. Online peer-to-peer communication is popular among young people and may improve mental health by providing social support. Previous systematic reviews have targeted Internet support groups for adults with mental health problems, including depression. However, there have been no systematic reviews examining the effectiveness of online peer-to-peer support in improving the mental health of a...

Online Peer-to-Peer Support for Young People With Mental Health Problems: A Systematic Review.

Science.gov (United States)

Ali, Kathina; Farrer, Louise; Gulliver, Amelia; Griffiths, Kathleen M

2015-01-01

Adolescence and early adulthood are critical periods for the development of mental disorders. Online peer-to-peer communication is popular among young people and may improve mental health by providing social support. Previous systematic reviews have targeted Internet support groups for adults with mental health problems, including depression. However, there have been no systematic reviews examining the effectiveness of online peer-to-peer support in improving the mental health of adolescents and young adults. The aim of this review was to systematically identify available evidence for the effectiveness of online peer-to peer support for young people with mental health problems. The PubMed, PsycInfo, and Cochrane databases were searched using keywords and Medical Subject Headings (MeSH) terms. Retrieved abstracts (n=3934) were double screened and coded. Studies were included if they (1) investigated an online peer-to-peer interaction, (2) the interaction discussed topics related to mental health, (3) the age range of the sample was between 12 to 25 years, and (4) the study evaluated the effectiveness of the peer-to-peer interaction. Six studies satisfied the inclusion criteria for the current review. The studies targeted a range of mental health problems including depression and anxiety (n=2), general psychological problems (n=1), eating disorders (n=1), and substance use (tobacco) (n=2). The majority of studies investigated Internet support groups (n=4), and the remaining studies focused on virtual reality chat sessions (n=2). In almost all studies (n=5), the peer support intervention was moderated by health professionals, researchers or consumers. Studies employed a range of study designs including randomized controlled trials (n=3), pre-post studies (n=2) and one randomized trial. Overall, two of the randomized controlled trials were associated with a significant positive outcome in comparison to the control group at post-intervention. In the remaining four

Reputation mechanism: From resolution for truthful online auctions to the model of optimal one-gambler problem

Energy Technology Data Exchange (ETDEWEB)

Bradonjic, Milan [Los Alamos National Laboratory

2009-01-01

In this paper we study reputation mechanisms, and show how the notion of reputation can help us in building truthful online auction mechanisms. From the mechanism design prospective, we derive the conditions on and design a truthful online auction mechanism. Moreover, in the case when some agents may lay or cannot have the real knowledge about the other agents reputations, we derive the resolution of the auction, such that the mechanism is truthful. Consequently, we move forward to the optimal one-gambler/one-seller problem, and explain how that problem is refinement of the previously discussed online auction design in the presence of reputation mechanism. In the setting of the optimal one-gambler problem, we naturally rise and solve the specific question: What is an agent's optimal strategy, in order to maximize his revenue? We would like to stress that our analysis goes beyond the scope, which game theory usually discusses under the notion of reputation. We model one-player games, by introducing a new parameter (reputation), which helps us in predicting the agent's behavior, in real-world situations, such as, behavior of a gambler, real-estate dealer, etc.

Effects of Using Graphics and Animation Online Problem-Based Learning on Visualization Skills among Students

Science.gov (United States)

Ariffin, A.; Samsudin, M. A.; Zain, A. N. Md.; Hamzah, N.; Ismail, M. E.

2017-05-01

The Engineering Drawing subject develops skills in geometry drawing becoming more professional. For the concept in Engineering Drawing, students need to have good visualization skills. Visualization is needed to help students get a start before translating into a drawing. So that, Problem Based Learning (PBL) using animation mode (PBL-A) and graphics mode (PBL-G) will be implemented in class. Problem-solving process is repeatedly able to help students interpret engineering drawings step work correctly and accurately. This study examined the effects of PBL-A online and PBL-G online on visualization skills of students in polytechnics. Sixty eight mechanical engineering students have been involved in this study. The visualization test adapted from Bennett, Seashore and Wesman was used in this study. Results showed significant differences in mean scores post-test of visualization skills among the students enrolled in PBL-G with the group of students who attended PBL-A online after effects of pre-test mean score is controlled. Therefore, the effects of animation modes have a positive impact on increasing students’ visualization skills.

Online Problem Solving for Adolescent Brain Injury: A Randomized Trial of 2 Approaches.

Science.gov (United States)

Wade, Shari L; Taylor, Hudson Gerry; Yeates, Keith Owen; Kirkwood, Michael; Zang, Huaiyu; McNally, Kelly; Stacin, Terry; Zhang, Nanhua

Adolescent traumatic brain injury (TBI) contributes to deficits in executive functioning and behavior, but few evidence-based treatments exist. We conducted a randomized clinical trial comparing Teen Online Problem Solving with Family (TOPS-Family) with Teen Online Problem Solving with Teen Only (TOPS-TO) or the access to Internet Resources Comparison (IRC) group. Children, aged 11 to 18 years, who sustained a complicated mild-to-severe TBI in the previous 18 months were randomly assigned to the TOPS-Family (49), TOPS-TO (51), or IRC group (52). Parent and self-report measures of externalizing behaviors and executive functioning were completed before treatment and 6 months later. Treatment effects were examined using linear regression models, adjusting for baseline symptom levels. Age, maternal education, and family stresses were examined as moderators. The TOPS-Family group had lower levels of parent-reported executive dysfunction at follow-up than the TOPS-TO group, and differences between the TOPS-Family and IRC groups approached significance. Maternal education moderated improvements in parent-reported externalizing behaviors, with less educated parents in the TOPS-Family group reporting fewer symptoms. On the self-report Behavior Rating Inventory of Executive Functions, treatment efficacy varied with the level of parental stresses. The TOPS-Family group reported greater improvements at low stress levels, whereas the TOPS-TO group reported greater improvement at high-stress levels. The TOPS-TO group did not have significantly lower symptoms than the IRC group on any comparison. Findings support the efficacy of online family problem solving to address executive dysfunction and improve externalizing behaviors among youth with TBI from less advantaged households. Treatment with the teen alone may be indicated in high-stress families.

Rasch Measurement of Collaborative Problem Solving in an Online Environment.

Science.gov (United States)

Harding, Susan-Marie E; Griffin, Patrick E

2016-01-01

This paper describes an approach to the assessment of human to human collaborative problem solving using a set of online interactive tasks completed by student dyads. Within the dyad, roles were nominated as either A or B and students selected their own roles. The question as to whether role selection affected individual student performance measures is addressed. Process stream data was captured from 3402 students in six countries who explored the problem space by clicking, dragging the mouse, moving the cursor and collaborating with their partner through a chat box window. Process stream data were explored to identify behavioural indicators that represented elements of a conceptual framework. These indicative behaviours were coded into a series of dichotomous items. These items represented actions and chats performed by students. The frequency of occurrence was used as a proxy measure of item difficulty. Then given a measure of item difficulty, student ability could be estimated using the difficulty estimates of the range of items demonstrated by the student. The Rasch simple logistic model was used to review the indicators to identify those that were consistent with the assumptions of the model and were invariant across national samples, language, curriculum and age of the student. The data were analysed using a one and two dimension, one parameter model. Rasch separation reliability, fit to the model, distribution of students and items on the underpinning construct, estimates for each country and the effect of role differences are reported. This study provides evidence that collaborative problem solving can be assessed in an online environment involving human to human interaction using behavioural indicators shown to have a consistent relationship between the estimate of student ability, and the probability of demonstrating the behaviour.

Confidence-Based Data Association and Discriminative Deep Appearance Learning for Robust Online Multi-Object Tracking.

Science.gov (United States)

Bae, Seung-Hwan; Yoon, Kuk-Jin

2018-03-01

Online multi-object tracking aims at estimating the tracks of multiple objects instantly with each incoming frame and the information provided up to the moment. It still remains a difficult problem in complex scenes, because of the large ambiguity in associating multiple objects in consecutive frames and the low discriminability between objects appearances. In this paper, we propose a robust online multi-object tracking method that can handle these difficulties effectively. We first define the tracklet confidence using the detectability and continuity of a tracklet, and decompose a multi-object tracking problem into small subproblems based on the tracklet confidence. We then solve the online multi-object tracking problem by associating tracklets and detections in different ways according to their confidence values. Based on this strategy, tracklets sequentially grow with online-provided detections, and fragmented tracklets are linked up with others without any iterative and expensive association steps. For more reliable association between tracklets and detections, we also propose a deep appearance learning method to learn a discriminative appearance model from large training datasets, since the conventional appearance learning methods do not provide rich representation that can distinguish multiple objects with large appearance variations. In addition, we combine online transfer learning for improving appearance discriminability by adapting the pre-trained deep model during online tracking. Experiments with challenging public datasets show distinct performance improvement over other state-of-the-arts batch and online tracking methods, and prove the effect and usefulness of the proposed methods for online multi-object tracking.

The Assessment of Quality, Accuracy, and Readability of Online Educational Resources for Platelet-Rich Plasma.

Science.gov (United States)

Ghodasra, Jason H; Wang, Dean; Jayakar, Rohit G; Jensen, Andrew R; Yamaguchi, Kent T; Hegde, Vishal V; Jones, Kristofer J

2018-01-01

To critically evaluate the quality, accuracy, and readability of readily available Internet patient resources for platelet-rich plasma (PRP) as a treatment modality for musculoskeletal injuries. Using the 3 most commonly used Internet search engines (Google, Bing, Yahoo), the search term "platelet rich plasma" was entered, and the first 50 websites from each search were reviewed. The website's affiliation was identified. Quality was evaluated using 25-point criteria based on guidelines published by the American Academy of Orthopaedic Surgeons, and accuracy was assessed with a previously described 12-point grading system by 3 reviewers independently. Readability was evaluated using the Flesch-Kincaid (FK) grade score. A total of 46 unique websites were identified and evaluated. The average quality and accuracy was 9.4 ± 3.4 (maximum 25) and 7.9 ± 2.3 (maximum 12), respectively. The average FK grade level was 12.6 ± 2.4, which is several grades higher than the recommended eighth-grade level for patient education material. Ninety-one percent (42/46) of websites were authored by physicians, and 9% (4/46) contained commercial bias. Mean quality was significantly greater in websites authored by health care providers (9.8 ± 3.1 vs 5.9 ± 4.7, P = .029) and in websites without commercial bias (9.9 ± 3.1 vs 4.5 ± 3.2, P = .002). Mean accuracy was significantly lower in websites authored by health care providers (7.6 ± 2.2 vs 11.0 ± 1.2, P = .004). Only 24% (11/46) reported that PRP remains an investigational treatment. The accuracy and quality of online patient resources for PRP are poor, and the information overestimates the reading ability of the general population. Websites authored by health care providers had higher quality but lower accuracy. Additionally, the majority of websites do not identify PRP as an experimental treatment, which may fail to provide appropriate patient understanding and expectations. Physicians should educate patients that many online

Competitive Analysis for Online Leasing Problem with Compound Interest Rate

Directory of Open Access Journals (Sweden)

Xingyu Yang

2011-01-01

Full Text Available We introduce the compound interest rate into the continuous version of the online leasing problem and discuss the generalized model by competitive analysis. On the one hand, the optimal deterministic strategy and its competitive ratio are obtained; on the other hand, a nearly optimal randomized strategy is constructed and a lower bound for the randomized competitive ratios is proved by Yao's principle. With the help of numerical examples, the theoretical results show that the interest rate puts off the purchase date and diminishes the uncertainty involved in the decision making.

The early benefits of a problem-based approach to teaching social inclusion using an online virtual town.

Science.gov (United States)

Beadle, Mary; Santy, Julie

2008-05-01

This article describes the delivery of a core pre-registration nursing and midwifery module centred on social inclusion. The module was previously delivered using a classroom-based problem-based learning approach. Difficulties with this approach led to changes to the module and its delivery. Logistic issues encouraged the module team to implement a blended learning approach using a virtual town to facilitate online learning and discussion activities. The paper describes and discusses the use of online learning technology to support student nurses and midwives. It highlights the benefits of this approach and outlines some of the experiences of the students including their evaluation of the virtual town. There is also an examination of some of the practical and theoretical issues related to both problem-based learning, online working and using a virtual town to support learning. This article outlines the approach taken and its implications.

Designing, implementing and evaluating an online problem-based learning (PBL) environment--a pilot study.

Science.gov (United States)

Ng, Manwa L; Bridges, Susan; Law, Sam Po; Whitehill, Tara

2014-01-01

Problem-based learning (PBL) has been shown to be effective for promoting student competencies in self-directed and collaborative learning, critical thinking, self-reflection and tackling novel situations. However, the need for face-to-face interactions at the same place and time severely limits the potential of traditional PBL. The requirements of space and for meeting at a specific location at the same time create timetabling difficulties. Such limitations need to be tackled before all potentials of PBL learning can be realized. The present study aimed at designing and implementing an online PBL environment for undergraduate speech/language pathology students, and assessing the associated pedagogical effectiveness. A group of eight PBL students were randomly selected to participate in the study. They underwent 4 weeks of online PBL using Adobe Connect. Upon completion of the experiment, they were assessed via a self-reported questionnaire and quantitative comparison with traditional PBL students based on the same written assignment. The questionnaire revealed that all participating students enjoyed online PBL, without any perceived negative effects on learning. Online PBL unanimously saved the students travel time to and from school. Statistical analysis indicated no significant difference in assignment grades between the online and traditional PBL groups, indicating that online PBL learning appears to be similarly effective as traditional face-to-face PBL learning.

The impact of problem solving strategy with online feedback on students’ conceptual understanding

Science.gov (United States)

Pratiwi, H. Y.; Winarko, W.; Ayu, H. D.

2018-04-01

The study aimed to determine the impact of the implementation of problem solving strategy with online feedback towards the students’ concept understanding. This study used quasi experimental design with post-test only control design. The participants were all Physics Education students of Kanjuruhan University year 2015. Then, they were divided into two different groups; 30 students belong to experiment class and the remaining 30 students belong to class of control. The students’ concept understanding was measured by the concept understanding test on multiple integral lesson. The result of the concept understanding test was analyzed by prerequisite test and stated to be normal and homogenic distributed, then the hypothesis was examined by T-test. The result of the study shows that there is difference in the concept understanding between experiment class and control class. Next, the result also shows that the students’ concept understanding which was taught using problem solving strategy with online feedback was higher than those using conventional learning; with average score of 72,10 for experiment class and 52,27 for control class.

Fostering Critical Thinking Skills in Students with Learning Disabilities through Online Problem-Based Learning

Science.gov (United States)

Flynn, Kathleen

2014-01-01

As a pedagogical approach, problem-based learning (PBL) has shown success for average and gifted students (HmeloSiver, 2004) and there are numerous incentives for its implementation in online learning environments (Savid-Baden, 2007; Chernobilsky, Nagarajan, & Hmelo-Silver, 2005). However, little research has been conducted regarding the…

MMORPG escapism predicts decreased well-being: examination of gaming time, game realism beliefs, and online social support for offline problems.

Science.gov (United States)

Kaczmarek, Lukasz D; Drążkowski, Dariusz

2014-05-01

Massively multiplayer online role-playing game (MMORPG) escapists are individuals who indulge in the MMORPG environment to avoid real world problems. Though a relationship between escapism and deteriorated well-being has been established, little is known about particular pathways that mediate this relationship. In the current study, we examined this topic by testing an integrative model of MMORPG escapism, which includes game realism beliefs, gaming time, offline social support, and online social support for offline problems. MMORPG players (N=1,056) completed measures of escapist motivation, game realism beliefs, social support, well-being, and reported gaming time. The tested structural equation model had a good fit to the data. We found that individuals with escapist motivation endorsed stronger game realism beliefs and spent more time playing MMORPGs, which, in turn, increased online support but decreased offline social support. Well-being was favorably affected by both online and offline social support, although offline social support had a stronger effect. The higher availability of online social support for offline problems did not compensate for the lower availability of offline support among MMORPG escapists. Understanding the psychological factors related to depletion of social resources in MMORPG players can help optimize MMORPGs as leisure activities.

The Iterative Development and Use of an Online Problem-Based Learning Module for Preservice and Inservice Teachers

Science.gov (United States)

Rillero, Peter; Camposeco, Laurie

2018-01-01

Teachers' problem-based learning knowledge, abilities, and attitudes are important factors in successful K--12 PBL implementations. This article describes the development and use of a free, online module entitled "Design a Problem-Based Learning Experience." The module production, aligned with theories of andragogy, was a partnership…

Fast Computation of Categorical Richness on Raster Data Sets and Related Problems

DEFF Research Database (Denmark)

de Berg, Mark; Tsirogiannis, Constantinos; Wilkinson, Bryan

2015-01-01

that runs in O(n) time and one for circular windows that runs in O((1+K/r)n) time, where K is the number of different categories appearing in G. The algorithms are not only very efficient in theory, but also in practice: our experiments show that our algorithms can handle raster data sets of hundreds...... of millions of cells. The categorical richness problem is related to colored range counting, where the goal is to preprocess a colored point set such that we can efficiently count the number of colors appearing inside a query range. We present a data structure for colored range counting in R^2 for the case......In many scientific fields, it is common to encounter raster data sets consisting of categorical data, such as soil type or land usage of a terrain. A problem that arises in the presence of such data is the following: given a raster G of n cells storing categorical data, compute for every cell c...

Solving of some Problems with On-Line Mode Measurement of Partial Discharges

Directory of Open Access Journals (Sweden)

Karel Zalis

2004-01-01

Full Text Available This paper deals with the problems discussing the transition from off-line diagnostic methods to on-line ones. Based on the experience with commercial partial discharge measuring equipment a new digital system for the evaluation of partial discharge measurement including software and hardware facilities has been developed at the Czech Technical University in Prague. Two expert systems work in this complex evaluating system: a rule-based expert system performing an amplitude analysis of partial discharge impulses for determining the damage of the insulation system, and a neural network which is used for a phase analysis of partial discharge impulses to determine the kind of partial discharge activity. Problem of the elimination of disturbances is also discussed.

Observation of online communities

DEFF Research Database (Denmark)

Nørskov, Sladjana V.; Rask, Morten

2011-01-01

This paper addresses the application of observation to online settings with a special focus on observer roles. It draws on a study of online observation of a virtual community, i.e. an open source software (OSS) community. The paper examines general and specific advantages and disadvantages...... of the observer roles in online settings by relating these roles to the same roles assumed in offline settings. The study suggests that under the right circumstances online and offline observation may benefit from being combined as they complement each other well. Quality issues and factors important to elicit...... trustworthy observational data from online study settings, such as OSS communities, are discussed. A proposition is made concerning how threats to credibility and transferability in relation to online observation (i.e. lack of richness and detail, risk of misunderstandings) can be diminished, while...

Effects of Website Interactivity on Online Retail Shopping Behavior

Science.gov (United States)

Islam, Hafizul

Motivations to engage in retail online shopping can include both utilitarian and hedonic shopping dimensions. To cater to these consumers, online retailers can create a cognitively and esthetically rich shopping environment, through sophisticated levels of interactive web utilities and features, offering not only utilitarian benefits and attributes but also providing hedonic benefits of enjoyment. Since the effect of interactive websites has proven to stimulate online consumer’s perceptions, this study presumes that websites with multimedia rich interactive utilities and features can influence online consumers’ shopping motivations and entice them to modify or even transform their original shopping predispositions by providing them with attractive and enhanced interactive features and controls, thus generating a positive attitude towards products and services offered by the retailer. This study seeks to explore the effects of Web interactivity on online consumer behavior through an attitudinal model of technology acceptance.

Students' Media Preferences in Online Learning

Science.gov (United States)

Kobayashi, Michiko

2017-01-01

This study examined students' preferred media in online learning and its relationship with learner characteristics and online technology self-efficacy. One hundred six college students in a mid-size U.S. university responded to a survey. The frequency analysis showed that students did not necessarily favor rich media over lean media in online…

Reducing problems of sociability in online communities : integrating online communication with offline interaction

NARCIS (Netherlands)

Matzat, U.

2010-01-01

Social network researchers have claimed that relations offline affect relations online; however, it is unclear which characteristics of online interaction are affected by the existence of offline relations. This article examines whether a mixture of virtual and real-life interaction—in contrast to

Sharing problem gamblers’ experiences: a text analysis of gambling stories via online forum

Directory of Open Access Journals (Sweden)

Andrea Caputo

2015-05-01

Full Text Available The present study explored some common thematic domains which characterised problem gambling experiences of adult Italian participants with the aim of understanding motivations and expectations of problem gamblers and thus promoting better psychological interventions. Emotional Text Analysis was performed on 24 problem gambling stories collected via online forum in order to detect the main themes (cluster analysis and latent factors (correspondence analysis emerging in gamblers’ narratives. Five themes emerged which respectively refer to guilt (16.15%, obsession (27.60%, disease (30.77%, risk taking (15.89% and emotion regulation (4.17%. In addition, four synthetic dimensions were detected which consent to account the variability of problem gambling experience based on: struggle against compulsion (F1, ambivalent acceptance of gambling (F2, interpersonal detachment (F3 and illusion of control (F4. From the emotional experience shaping the problem gamblers’ narratives, this research study allows the identification of some factors which can contribute to quality research on problem gambling and which can provide some useful suggestion for treatment.

Conflict management in online relationships.

Science.gov (United States)

Ishii, Kumi

2010-08-01

With the diffusion of networked technology, personal relationships can be easily formed and maintained online today. Similar to a face-to-face situation, conflict is also seen in these online relationships. Early theories suggested that computer-mediated communication (CMC) tends to increase conflicts because of the lack of social-context cues, and CMC is not rich enough to manage conflict. As CMC has become part of our daily life, we often face conflict online, and thus we need to understand how people manage conflict online. This study explored how online users manage interpersonal conflict. Self-report survey data from 159 university students were analyzed to examine their conflict-management styles in association with the perceived closeness of the online relationship and a future intention toward the relationship. The results indicated that online users select cooperative management styles to handle conflict in their close relationships. In addition, online users avoid less cooperative styles when they want to continue the relationship.

Students’ Media Preferences in Online Learning

Directory of Open Access Journals (Sweden)

Michiko KOBAYASHI

2017-07-01

Full Text Available This study examined students’ preferred media in online learning and its relationship with learner characteristics and online technology self-efficacy. One hundred six college students in a mid-size U.S. university responded to a survey. The frequency analysis showed that students did not necessarily favor rich media over lean media in online learning. They preferred recorded online slide presentations with audio to Internet-based live video lectures in two-way video and audio interactions. Online discussion boards and chat groups were less favored than other types of media. As expected, online technology self-efficacy was correlated with a type of media requiring a relatively higher level of technology skills. The paper presents the results and discusses their implications of the study.

Online Poker Gambling in University Students: Further Findings from an Online Survey

Science.gov (United States)

Griffiths, Mark; Parke, Jonathan; Wood, Richard; Rigbye, Jane

2010-01-01

Online poker is one of the fastest growing forms of online gambling yet there has been relatively little research to date. This study comprised 422 online poker players (362 males and 60 females) and investigated some of the predicting factors of online poker success and problem gambling using an online questionnaire. Results showed that length of…

Gauging the gaps in student problem-solving skills: assessment of individual and group use of problem-solving strategies using online discussions.

Science.gov (United States)

Anderson, William L; Mitchell, Steven M; Osgood, Marcy P

2008-01-01

For the past 3 yr, faculty at the University of New Mexico, Department of Biochemistry and Molecular Biology have been using interactive online Problem-Based Learning (PBL) case discussions in our large-enrollment classes. We have developed an illustrative tracking method to monitor student use of problem-solving strategies to provide targeted help to groups and to individual students. This method of assessing performance has a high interrater reliability, and senior students, with training, can serve as reliable graders. We have been able to measure improvements in many students' problem-solving strategies, but, not unexpectedly, there is a population of students who consistently apply the same failing strategy when there is no faculty intervention. This new methodology provides an effective tool to direct faculty to constructively intercede in this area of student development.

PBL online

DEFF Research Database (Denmark)

Kolbæk, Ditte; Nortvig, Anne-Mette

2017-01-01

Problem- and Project-Based Learning (PBL) is a widely used pedagogical method in higher education. Although PBL encourages self-directed learning and works with the students’ own projects and problems, it also includes teacher presentations, discussions and group reflections, both on......-campus and online. Therefore, the teacher’s plans might be relevant to the students’ projects, but that is not always the case. This study investigates how master’s students interact with an online Problem-Based Learning design and examines how technology influences these interactions. The empirical data stem from...... lessons at an online master’s course, and they were collected and analyzed using a netnographic approach. The study finds that concepts like self-directed learning and active involvement of everyone can have very different meanings from the teachers’ and the students’ points of view. If the students do...

On-line Social Interactions and Executive Functions

Directory of Open Access Journals (Sweden)

Oscar eYbarra

2012-04-01

Full Text Available A successful social interaction requires fast, on-line, and active construction of an ever-changing mental-model of another’s person beliefs, expectations, emotions, and desires. It also requires the ability to inhibit inappropriate behaviors, problem-solve, take-turns, and pursue goals in a distraction-rich environment. All these tasks rely on executive functions (EF—working memory, attention/cognitive control, and inhibition. Executive functioning has long been viewed as relatively static. However, starting with recent reports of successful cognitive interventions, this view is changing and now EFs are seen as much more open to both short and long term training, warm-up, and exhaustion effects. Some of the most intriguing evidence comes from research showing how social interaction enhances performance on standard EF tests. Interestingly, the latest research indicates these EF benefits are selectively conferred by certain on-line, dynamic social interactions, which require participants to engage with another person and actively construct the model of their mind. We review this literature and highlight its connection with evolutionary and cultural theories emphasizing links between intelligence and social life.

Online interventions for problem gamblers with and without co-occurring mental health symptoms: Protocol for a randomized controlled trial

Directory of Open Access Journals (Sweden)

John A. Cunningham

2016-07-01

Full Text Available Abstract Background Comorbidity between problem gambling and depression or anxiety is common. Further, the treatment needs of people with co-occurring gambling and mental health symptoms may be different from those of problem gamblers who do not have a co-occurring mental health concern. The current randomized controlled trial (RCT will evaluate whether there is a benefit to providing access to mental health Internet interventions (G + MH intervention in addition to an Internet intervention for problem gambling (G-only intervention in participants with gambling problems who do or do not have co-occurring mental health symptoms. Methods Potential participants will be screened using an online survey to identify participants meeting criteria for problem gambling. As part of the baseline screening process, measures of current depression and anxiety will be assessed. Eligible participants agreeing (N = 280 to take part in the study will be randomized to one of two versions of an online intervention for gamblers – an intervention that just targets gambling issues (G-only versus a website that contains interventions for depression and anxiety in addition to an intervention for gamblers (G + MH. It is predicted that problem gamblers who do not have co-occurring mental health symptoms will display no significant difference between intervention conditions at a six-month follow-up. However, for those with co-occurring mental health symptoms, it is predicted that participants receiving access to the G + MH website will display significantly reduced gambling outcomes at six-month follow-up as compared to those provided with G-only website. Discussion The trial will produce information on the best means of providing online help to gamblers with and without co-occurring mental health symptoms. Trial registration ClinicalTrials.gov NCT02800096 ; Registration date: June 14, 2016.

An Online Game Approach for Improving Students' Learning Performance in Web-Based Problem-Solving Activities

Science.gov (United States)

Hwang, Gwo-Jen; Wu, Po-Han; Chen, Chi-Chang

2012-01-01

In this paper, an online game was developed in the form of a competitive board game for conducting web-based problem-solving activities. The participants of the game determined their move by throwing a dice. Each location of the game board corresponds to a gaming task, which could be a web-based information-searching question or a mini-game; the…

Rich Vehicle Routing Problems and Applications

DEFF Research Database (Denmark)

Wen, Min

very short computational time on real-life data involving up to 200 pairs of suppliers and customers. The second problem we consider is a dynamic vehicle routing problem with multiple objectives over a planning horizon that consists of multiple periods. In this problem, customer orders are revealed...... the company’s solution in terms of all the objectives, including the travel time, customer waiting and daily workload balances, under the given constraints considered in the work. Finally, we address an integrated vehicle routing and driver scheduling problem, in which a large number of practical constraints....... The method is implemented and tested on real-life data involving up to 2000 orders. It is shown that the method is able to provide solutions of good quality within reasonable running time....

Predicting protein structures with a multiplayer online game.

Science.gov (United States)

Cooper, Seth; Khatib, Firas; Treuille, Adrien; Barbero, Janos; Lee, Jeehyung; Beenen, Michael; Leaver-Fay, Andrew; Baker, David; Popović, Zoran; Players, Foldit

2010-08-05

People exert large amounts of problem-solving effort playing computer games. Simple image- and text-recognition tasks have been successfully 'crowd-sourced' through games, but it is not clear if more complex scientific problems can be solved with human-directed computing. Protein structure prediction is one such problem: locating the biologically relevant native conformation of a protein is a formidable computational challenge given the very large size of the search space. Here we describe Foldit, a multiplayer online game that engages non-scientists in solving hard prediction problems. Foldit players interact with protein structures using direct manipulation tools and user-friendly versions of algorithms from the Rosetta structure prediction methodology, while they compete and collaborate to optimize the computed energy. We show that top-ranked Foldit players excel at solving challenging structure refinement problems in which substantial backbone rearrangements are necessary to achieve the burial of hydrophobic residues. Players working collaboratively develop a rich assortment of new strategies and algorithms; unlike computational approaches, they explore not only the conformational space but also the space of possible search strategies. The integration of human visual problem-solving and strategy development capabilities with traditional computational algorithms through interactive multiplayer games is a powerful new approach to solving computationally-limited scientific problems.

Properties of neutron-rich hafnium high-spin isomers

CERN Multimedia

Tungate, G; Walker, P M; Neyens, G; Billowes, J; Flanagan, K; Koester, U H; Litvinov, Y

It is proposed to study highly-excited multi-quasiparticle isomers in neutron-rich hafnium (Z=72) isotopes. Long half-lives have already been measured for such isomers in the storage ring at GSI, ensuring their accessibility with ISOL production. The present proposal focuses on:\\\\ (i) an on-line experiment to measure isomer properties in $^{183}$Hf and $^{184}$Hf, and\\\\ (ii) an off-line molecular breakup test using REXTRAP, to provide Hf$^{+}$ beams for future laser spectroscopy and greater sensitivity for the future study of more neutron-rich isotopes.

Efficacy of an Online Resource for Teaching Interpersonal Problem Solving Skills to Women Graduate Students in Engineering

Science.gov (United States)

Bekki, Jennifer M.; Bernstein, Bianca; Fabert, Natalie; Gildar, Natalie; Way, Amy

2014-01-01

Interpersonal problem solving skills allow engineers to prevent interpersonal difficulties more effectively and to manage conflict, both of which are critical to successful participation on teams. This research provides evidence that the "Career"WISE online learning environment can improve those skills among women in engineering graduate…

Use of an Online Clinical Process Support System as an Aid to Identification and Management of Developmental and Mental Health Problems.

Science.gov (United States)

Howard, Barbara J; Sturner, Raymond

2017-12-01

To describe benefits and problems with screening and addressing developmental and behavioral problems in primary care and using an online clinical process support system as a solution. Screening has been found to have various implementation barriers including time costs, accuracy, workflow and knowledge of tools. In addition, training of clinicians in dealing with identified issues is lacking. Patients disclose more to and prefer computerized screening. An online clinical process support system (CHADIS) shows promise in addressing these issues. Use of a comprehensive panel of online pre-visit screens; linked decision support to provide moment-of-care training; and post-visit activities and resources for patient-specific education, monitoring and care coordination is an efficient way to make the entire process of screening and follow up care feasible in primary care. CHADIS fulfills these requirements and provides Maintenance of Certification credit to physicians as well as added income for screening efforts.

Internet Explorers: the online campaign

NARCIS (Netherlands)

Wall, M.; Sudulich, M.L.; Gallagher, M.; Marsh, M.

2011-01-01

The idea of an ‘internet election’ was initially put forward in 1997. However, there is little evidence to date that online campaigning has supplanted more traditional campaign practices. This is particularly true of Irish campaigns, which are hardware-rich affairs characterised by substantial

Prevention and early intervention of anxiety problems in young children: A pilot evaluation of Cool Little Kids Online

Directory of Open Access Journals (Sweden)

Amy J. Morgan

2016-05-01

Full Text Available Anxiety disorders are common, debilitating, and begin early in life. Early intervention to prevent anxiety disorders in children who are at risk could have long-term impact. The ‘Cool Little Kids’ parenting group program has previously been shown to be efficacious in preventing anxiety disorders in temperamentally inhibited young children. Wider dissemination of the program could be achieved with an internet-based delivery platform, affording greater accessibility and convenience for parents. The aim of this study was to evaluate ‘Cool Little Kids Online’, a newly developed online version of the existing parenting group program. Fifty-one parents of children aged 3–6 years were recruited to evaluate the online program's acceptability and preliminary efficacy in reducing inhibited young children's anxiety problems. Parents were randomized to receive either a clinician-supported version or an unsupported version of the program. Parents had 10 weeks to access the program and completed questionnaires at baseline and post-intervention. Both groups showed medium-to-large reductions in children's anxiety symptoms, emotional symptoms, number of child anxiety diagnoses, and improvements in life interference from anxiety. The effect of clinician support was inconsistent and difficult to interpret. Parents reported high levels of satisfaction with the program. These encouraging results indicate that the online version is acceptable and useful for parents with temperamentally inhibited young children. Cool Little Kids Online may be a promising direction for improving access to an evidence-based prevention and early intervention program for child anxiety problems. A large randomized trial is warranted to further evaluate efficacy.

Online virtual-patient cases versus traditional problem-based learning in advanced pharmacy practice experiences.

Science.gov (United States)

Al-Dahir, Sara; Bryant, Kendrea; Kennedy, Kathleen B; Robinson, Donna S

2014-05-15

To evaluate the efficacy of faculty-led problem-based learning (PBL) vs online simulated-patient case in fourth-year (P4) pharmacy students. Fourth-year pharmacy students were randomly assigned to participate in either online branched-case learning using a virtual simulation platform or a small-group discussion. Preexperience and postexperience student assessments and a survey instrument were completed. While there were no significant differences in the preexperience test scores between the groups, there was a significant increase in scores in both the virtual-patient group and the PBL group between the preexperience and postexperience tests. The PBL group had higher postexperience test scores (74.8±11.7) than did the virtual-patient group (66.5±13.6) (p=0.001). The PBL method demonstrated significantly greater improvement in postexperience test scores than did the virtual-patient method. Both were successful learning methods, suggesting that a diverse approach to simulated patient cases may reach more student learning styles.

Massively multiplayer online role-playing game-induced seizures: a neglected health problem in Internet addiction.

Science.gov (United States)

Chuang, Yao-Chung

2006-08-01

As the Internet has become rapidly and widely integrated into society, Internet addiction has become a growing psychosocial problem. However, epileptic seizure, another out-of-the-ordinary health problem, is often neglected in this regard. Ten patients who experienced epileptic seizures while playing the newest genre of electronic games -- Massively Multiplayer Online Role-Playing Games (MMORPGs) -- were investigated. Patients were predominantly male young adults, and most of the events were generalized tonic-clonic seizures, myoclonic seizures, and absences. These patients should be categorized into idiopathic generalized epilepsies. Even though photosensitivity was an important factor, behavioral and higher mental activities also seemed to be significant seizure precipitants. Results demonstrated that MMORPG-induced seizures were not analogous to the ordinary video game-induced seizures. Significantly, an epileptic seizure warning did not always appear on the websites of MMORPGs and instructions for the software. While the prevalence of MMORPG-induced seizures remains unknown, it may exceed our expectations and impact our society. Not only for clinical neurologists but also for the primary physicians, educators, sociologists, and global online game publishers, there should be an awareness of this special form of reflex seizures in order to provide an appropriate health warning to MMORPG players.

Performance of the LHCb RICH detector at the LHC

Energy Technology Data Exchange (ETDEWEB)

Adinolfi, M.; Brook, N.H.; Coombes, M.; Hampson, T.; Rademacker, J.H.; Solomin, A.; Voong, D. [University of Bristol, H.H. Wills Physics Laboratory, Bristol (United Kingdom); Aglieri Rinella, G.; Albrecht, E.; D' Ambrosio, C.; Forty, R.; Frei, C.; Gys, T.; Kanaya, N.; Koblitz, S.; Mollen, A.; Morant, J.; Piedigrossi, D.; Storaci, B.; Ullaland, O.; Vervink, K.; Wyllie, K. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Bellunato, T.; Calvi, M.; Fanchini, E.; Giachero, A.; Gotti, C.; Kucharczyk, M.; Maino, M.; Matteuzzi, C.; Perego, D.L.; Pessina, G. [Sezione INFN di Milano Bicocca, Milano (Italy); Benson, S.; Eisenhardt, S.; Fitzpatrick, C.; Kim, Y.M.; Lambert, D.; Main, A.; Muheim, F.; Playfer, S.; Sparkes, A.; Young, R. [University of Edinburgh, School of Physics and Astronomy, Edinburgh (United Kingdom); Blake, T. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Imperial College London, London (United Kingdom); Blanks, C.; Cameron, B.; Carson, L.; Egede, U.; Owen, P.; Patel, M.; Plackett, R.; Savidge, T.; Sepp, I.; Soomro, F.; Websdale, D. [Imperial College London, London (United Kingdom); Brisbane, S.; Contu, A.; Gandini, P.; Gao, R.; Harnew, N.; Hill, D.; Hunt, P.; John, M.; Johnson, D.; Malde, S.; Muresan, R.; Powell, A.; Thomas, C.; Topp-Joergensen, S.; Torr, N.; Wilkinson, G.; Xing, F. [University of Oxford, Department of Physics, Oxford (United Kingdom); Cardinale, R.; Fontanelli, F.; Mini' , G.; Petrolini, A.; Sannino, M. [Sezione INFN di Genova, Genova (Italy); Easo, S. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); STFC Rutherford Appleton Laboratory, Didcot (United Kingdom); Garra Tico, J.; Gibson, V.; Gregson, S.; Haines, S.C.; Jones, C.R.; Katvars, S.; Kerzel, U.; Mangiafave, N.; Rogers, G.J.; Sigurdsson, S.; Wotton, S.A. [University of Cambridge, Cavendish Laboratory, Cambridge (United Kingdom); Mountain, R. [Syracuse University, Syracuse, NY (United States); Morris, J.V.; Nardulli, J.; Papanestis, A.; Patrick, G.N.; Ricciardi, S. [STFC Rutherford Appleton Laboratory, Didcot (United Kingdom); Sail, P.; Soler, F.J.P.; Spradlin, P. [University of Glasgow, School of Physics and Astronomy, Glasgow (United Kingdom); Collaboration: The LHCb RICH Collaboration

2013-05-15

The LHCb experiment has been taking data at the Large Hadron Collider (LHC) at CERN since the end of 2009. One of its key detector components is the Ring-Imaging Cherenkov (RICH) system. This provides charged particle identification over a wide momentum range, from 2-100 GeV/c. The operation and control, software, and online monitoring of the RICH system are described. The particle identification performance is presented, as measured using data from the LHC. Excellent separation of hadronic particle types ({pi}, K, p) is achieved. (orig.)

The Effect of Student Collaboration in Solving Physics Problems Using an Online Interactive Response System

OpenAIRE

Balta, Nuri; Awedh, Mohammad Hamza

2016-01-01

Advanced technology helps educational institutes to improve student learning performance and outcomes. In this study, our aim is to measure and assess student engagement and collaborative learning in engineering classes when using online technology in solving physics problems. The interactive response system used in this study is a collaborative learning tool that allows teachers to monitor their students’ response and progress in real time. Our results indicated that students have highly pos...

Influence of Word of Mouth Communication Towards Indonesian Online Shopper Purchase Intention

OpenAIRE

Purwanegara, Mustika Sufiati; Yuliana, Eka

2010-01-01

Word-of-mouth (WOM) gives the consumer perceptions to engage in retail online shopping can include both utilitarian and hedonic shopping dimensions. To cater to these consumers, online retailers can create a cognitively and esthetically rich shopping environment, through sophisticated levels of communication, as the personal influence, online community, and also by sharing they experienceSince the effect of word of mouth communications on marketing and has proven to stimulate onlin...

Mini-KiSS Online: an Internet-based intervention program for parents of young children with sleep problems – influence on parental behavior and children's sleep

Directory of Open Access Journals (Sweden)

Schlarb AA

2012-03-01

Full Text Available Angelika A Schlarb1,2,*, Isabel Brandhorst1,* 1University of Tuebingen, Faculty of Science, Department of Psychology, Tuebingen, 2University of Koblenz-Landau, Department of Psychology, Landau, Germany*The authors contributed equally to this workPurpose: Behavioral sleep problems are highly common in early childhood. These sleep problems have a high tendency to persist, and they may have deleterious effects on early brain development, attention, and mood regulation. Furthermore, secondary effects on parents and their relationship are documented. Negative parental cognition and behavior have been found to be important influencing factors of a child's behavioral sleep problems. Therefore, in the current study we examined the acceptance and efficacy of a newly developed Internet-based intervention program called Mini-KiSS Online for sleep disturbances for children aged 6 months to 4 years and their parents.Patients and methods: Fifty-five children (54.54% female; aged 8–57 months suffering from psychophysiological insomnia or behavioral insomnia participated in the 6-week online treatment. Sleep problems and treatment acceptance were examined with a sleep diary, anamnestic questionnaires, a child behavior checklist (the Child Behavior Checklist 1.5–5, and treatment evaluation questionnaires.Results: The evaluation questionnaires showed a high acceptance of Mini-KiSS Online. Parents would recommend the treatment to other families, were glad to participate, and reported that they were able to deal with sleep-related problems of their child after Mini-KiSS Online. Parental behavior strategies changed with a reduction of dysfunctional strategies, such as staying or soothing the child until they fell asleep, allowing the child to get up again and play or watch TV, or reading them another bedtime story. Frequency and duration of night waking decreased as well as the need for external help to start or maintain sleep. All parameters changed

Monitoring of absolute mirror alignment at COMPASS RICH-1 detector

NARCIS (Netherlands)

Alexeev, M.; Birsa, R.; Bradamante, F.; Bressan, A.; Chiosso, M.; Ciliberti, P.; Dalla Torre, S.; Denisov, O.; Duic, V.; Ferrero, A.; Finger, M.; Finger, M.; Gayde, J. Ch; Giorgi, M.; Gobbo, B.; Levorato, S.; Maggiora, A.; Martin, A.; Menon, G.; Panzieri, D.; Pesaro, G.; Polak, J.; Rocco, E.; Sbrizzai, G.; Schiavon, P.; Slunecka, M.; Sozzi, F.; Steiger, L.; Sulc, M.; Takekawa, S.; Tessarotto, F.

2014-01-01

The gaseous COMPASS RICH-1 detector uses two spherical mirror surfaces, segmented into 116 individual mirrors, to focus the Cherenkov photons onto the detector plane. Any mirror misalignment directly affects the detector resolution. The on-line Continuous Line Alignment and Monitoring (CLAM)

Program elaborated of combined regime for on-line and off-line problems

International Nuclear Information System (INIS)

Ivanova, A.B.; Ioramashvili, Eh.Sh.; Polyakov, B.F.; Razdol'skaya, L.A.

1979-01-01

A description of the part of operational system designed for organization of packet treatment of algol tasks combined with the on-line system is provided. A block-scheme of the operational system functioning in the packet regime is presented. The ''Director'' program is the main part of the operational system which is responsible for the functioning of the algol programs. Its starting for the first time is carried out by the operator. All the subsequent process of the operation is automized. Problems connected with the organization of interruptions appearing in the cases of failures and as a reaction for the end of operation of any algol program or some of its links are considered

The Active Use of Online Presence, Movies and Gameplay to Improve Classroom Engagement

OpenAIRE

Costain , Sean; Patterson , Dale

2014-01-01

Part 1: Digital Games and Interactive Entertainment; International audience; The online world is filled with rich interactive games, spaces, motion pictures and personas. Despite a rapid growth in online education, the tertiary classroom looks quite different to the entertaining online world it exists within. The design of mobile online resources, both official and unofficial, plays a key role in student engagement and learning. From the teachers perspective designing an online presence and i...

Resolving embarrassing medical conditions with online health information.

Science.gov (United States)

Redston, Sarah; de Botte, Sharon; Smith, Carl

2018-06-01

Reliance on online health information is proliferating and the Internet has the potential to revolutionize the provision of public health information. The anonymity of online health information may be particularly appealing to people seeking advice on 'embarrassing' health problems. The purpose of this study was to investigate (1) whether data generated by the embarrassingproblems.com health information site showed any temporal patterns in problem resolution, and (2) whether successful resolution of a medical problem using online information varied with the type of medical problem. We analyzed the responses of visitors to the embarrassingproblems.com website on the resolution of their problems. The dataset comprised 100,561 responses to information provided on 77 different embarrassing problems grouped into 9 classes of medical problem over an 82-month period. Data were analyzed with a Bernoulli Generalized Linear Model using Bayesian inference. We detected a statistically important interaction between embarrassing problem type and the time period in which data were collected, with an improvement in problem resolution over time for all of the classes of medical problem on the website but with a lower rate of increase in resolution for urinary health problems and medical problems associated with the mouth and face. As far as we are aware, this is the first analysis of data of this nature. Findings support the growing recognition that online health information can contribute to the resolution of embarrassing medical problems, but demonstrate that outcomes may vary with medical problem type. The results indicate that building data collection into online information provision can help to refine and focus health information for online users. Copyright © 2018 Elsevier B.V. All rights reserved.

An adversarial queueing model for online server routing

NARCIS (Netherlands)

Bonifaci, V.

2007-01-01

In an online server routing problem, a vehicle or server moves in a network in order to process incoming requests at the nodes. Online server routing problems have been thoroughly studied using competitive analysis. We propose a new model for online server routing, based on adversarial queueing

Algorithms for the on-line travelling salesman

NARCIS (Netherlands)

Ausiello, G.; Feuerstein, E.; Leonardi, S.; Stougie, L.; Talamo, M.

1999-01-01

In this paper the problem of efficiently serving a sequence of requests presented in an on-line fashion located at points of a metric space is considered. We call this problem the On-Line Travelling Salesman Problem (OLTSP). It has a variety of relevant applications in logistics and robotics. We

Antecedents of loyalty in an online retailing business

OpenAIRE

Hashemi, Roshanak

2013-01-01

Retailing industry is challenged by empowered customers, scattered markets and intensified competition. Online retailing has a unique opportunity to take a leading role in the global marketplace by providing location free, customer controlled, and information rich retail service. Customer experience with an online retailer includes multiple factors. It is crucial to determine what website functions and features should be emphasized to create a satisfactory experience. Understanding an effecti...

Social Capital on Facebook: The Impact of Personality and Online Communication Behaviors

Science.gov (United States)

Weiqin, Eliza Leong; Campbell, Marilyn; Kimpton, Melanie; Wozencroft, Kelly; Orel, Alexandra

2016-01-01

Online relationship formation through social networking sites helps to meet the developmental need for intimacy in emerging adults. Through the use of the "rich get richer" and the "social compensation" hypotheses, it is evident that personality characteristics such as extraversion and introversion impact online relationship…

Aproximační a online algoritmy

OpenAIRE

Tichý, Tomáš

2008-01-01

This thesis presents results of our research in the area of optimization problems with incomplete information-our research is focused on the online scheduling problems. Our research is based on the worst-case analysis of studied problems and algorithms; thus we use methods of the competitive analysis during our research. Althrough there are many "real-world" industrial and theoretical applications of the online scheduling problems there are still so many open problems with so simple descripti...

Online Collaborative Learning and Communication Media

Science.gov (United States)

Havard, Byron; Du, Jianxia; Xu, Jianzhong

2008-01-01

The purpose of this study is to examine the dynamics of online collaborative learning and communication media regarding team projects. Media richness and social presence theories are well-accepted rational theories that explain media choices and media behaviors, and serve as the theoretical framework. Quantitative and qualitative data collection…

Technology is Here to Stay in (Online Higher Education

Directory of Open Access Journals (Sweden)

Jennifer A. Herzog

2015-02-01

Full Text Available Review of: Minds Online; Michelle D. Miller; (2014. Harvard University Press, Cambridge, MA. 279 pages.A review of the new book "Minds Online" by Michelle D. Miller, a cognitive psychologist, in which she analyzes the history of attention, memory, and thinking research and how new studies can enhance technology-driven education.  A low-tech approach makes this book very readable to faculty and administrators thinking of diving into the online teacing format, yet its up to date research and practical examples are a rich resource for even veteran distance learning educators.

A comparison of classroom and online asynchronous problem-based learning for students undertaking statistics training as part of a Public Health Masters degree.

Science.gov (United States)

de Jong, N; Verstegen, D M L; Tan, F E S; O'Connor, S J

2013-05-01

This case-study compared traditional, face-to-face classroom-based teaching with asynchronous online learning and teaching methods in two sets of students undertaking a problem-based learning module in the multilevel and exploratory factor analysis of longitudinal data as part of a Masters degree in Public Health at Maastricht University. Students were allocated to one of the two study variants on the basis of their enrolment status as full-time or part-time students. Full-time students (n = 11) followed the classroom-based variant and part-time students (n = 12) followed the online asynchronous variant which included video recorded lectures and a series of asynchronous online group or individual SPSS activities with synchronous tutor feedback. A validated student motivation questionnaire was administered to both groups of students at the start of the study and a second questionnaire was administered at the end of the module. This elicited data about student satisfaction with the module content, teaching and learning methods, and tutor feedback. The module coordinator and problem-based learning tutor were also interviewed about their experience of delivering the experimental online variant and asked to evaluate its success in relation to student attainment of the module's learning outcomes. Student examination results were also compared between the two groups. Asynchronous online teaching and learning methods proved to be an acceptable alternative to classroom-based teaching for both students and staff. Educational outcomes were similar for both groups, but importantly, there was no evidence that the asynchronous online delivery of module content disadvantaged part-time students in comparison to their full-time counterparts.

Regulating Online Data Privacy

OpenAIRE

Paul Reid

2004-01-01

With existing data protection laws proving inadequate in the fight to protect online data privacy and with the offline law of privacy in a state of change and uncertainty, the search for an alternative solution to the important problem of online data privacy should commence. With the inherent problem of jurisdiction that the Internet presents, such a solution is best coming from a multi-national body with the power to approximate laws in as many jurisdictions as possible, with a recognised au...

Online Algorithms for Parallel Job Scheduling and Strip Packing

NARCIS (Netherlands)

Hurink, Johann L.; Paulus, J.J.

We consider the online scheduling problem of parallel jobs on parallel machines, $P|online{−}list,m_j |C_{max}$. For this problem we present a 6.6623-competitive algorithm. This improves the best known 7-competitive algorithm for this problem. The presented algorithm also applies to the problem

Online frauds:learning from victims why they fall for these scams

OpenAIRE

Button, Mark; McNaughton Nicholls, Carol; Kerr, Jane; Owen, Rachael

2014-01-01

Online frauds have become a major problem in many countries with millions of victims from a wide diversity of scams committed in full or part online. This paper explores the extent and nature of this problem. Using data from depth interviews with 15 online fraud victims, 6 focus groups with a further 48 online fraud victims and interviews with 9 professional stakeholders involved in combating this problem. The paper explores why victims fall for online scams. It identifies a range of reasons ...

EXPERIENCES OF REPERCUSSIONS FROM PARTICIPATION IN ONLINE DEBATE

DEFF Research Database (Denmark)

Løvlie, Anders Sundnes; Ihlebæk, Karoline Andrea

Based on data from a survey among contributors (n=3470) to the online comments sections of four Norwegian newspapers, we investigate the following research question: How do contributors to online comments sections in newspaper websites describe their experiences of repercussions from participation...... in debates? Through analysis of two survey questions asking respondents whether they have experienced problems in everyday life after participating in online comments, we find that women to a larger degree report such problems. However, when studying the types of problems reported, we fail to replicate...... earlier findings about gender differences associated with different types of problems. Instead, we find a surprising dominance of relatively inconsequential issues, leading to a discussion about the communicative competencies of participants, and the challenge in facilitating online debate for people...

Online and offline video game use in adolescents: measurement invariance and problem severity.

Science.gov (United States)

Smohai, Máté; Urbán, Róbert; Griffiths, Mark D; Király, Orsolya; Mirnics, Zsuzsanna; Vargha, András; Demetrovics, Zsolt

2017-01-01

Despite the increasing popularity of video game playing, little is known about the similarities and differences between online and offline video game players. The aims of this study were (i) to test the applicability and the measurement invariance of the previously developed Problematic Online Gaming Questionnaire (POGQ) in both online and offline gamers and to (ii) examine the differences in these groups. Video game use habits and POGQ were assessed in a sample of 1,964 (71% male) adolescent videogame players. Those gamers who played at least sometimes in an online context were considered "online gamers," while those who played videogames exclusively offline were considered "offline gamers." Confirmatory factor analysis supported the measurement invariance across online and offline videogame players. According to the multiple indicators multiple causes (MIMIC) model, online gamers were more likely to score higher on overuse, interpersonal conflict, and social isolation subscales of the POGQ. The results of the present study suggest that online and offline gaming can be assessed using the same psychometric instrument. These findings open the possibility for future research studies concerning problematic video gaming to include participants who exclusively play online or offline games, or both. However, the study also identified important structural features about how online and offline gaming might contribute differently to problematic use. These results provide important information that could be utilized in parental education and the prevention program about the possible detrimental consequences of online vs. offline video gaming.

Emerging Open Online Distance Education Environment

Science.gov (United States)

Schroeder, Raymond

2012-01-01

A revolution of sorts is underway in providing open access to rich resources, actual courses, and even entire degrees online. This revolution is fueled by the combination of a bubble in tuition rates, lingering effects of the recession, monumental student debt exceeding one trillion dollars in the United States, development of increasingly…

First on-line mass measurements at SHIPTRAP and mass determinations of neutron-rich Fr and Ra isotopes at ISOLTRAP

CERN Document Server

Rahaman, Saidu

SHIPTRAP is an ion trap facility behind the velocity filter SHIP at GSI/Darmstadt. Its aim are precision studies of transuranium nuclides produced in a fusion reaction and separated by SHIP. The current set-up for high-precision mass measurements consists of three main functional parts: (i) a gas cell for stopping the energetic ions from SHIP, (ii) radiofrequency quadrupole structures to cool and to bunch the ions extracted from the gas cell, and (iii) a superconducting magnet with two cylindrical Penning traps at a field strength of 7 T. In this work the Penning trap system has been installed and extensively characterized. The first on-line mass measurements of short-lived nuclides were carried out and the masses of $^{147}$Er and $^{148}$Er could be experimentally determined for the first time. Here a relative mass uncertainty of $\\delta$ m/m of about 1$\\times$ 10$^{-6}$ was achieved. Furthermore the masses of heavy neutron-rich $^{229-232}$Ra and $^{230}$Fr isotopes have been determined with a relative m...

Mechanism Design for the Online Allocation of Items without Monetary Payments

NARCIS (Netherlands)

Jalilzadeh, B.; Planken, L.; De Weerdt, M.M.

2010-01-01

We consider online mechanism design without money, where agents are allowed to trade items with other agents, in an attempt to improve their own allocation. In an off-line context, this problem is known as the House Allocation Problem (HAP). We extend HAP to an online problem and call it the Online

Online solving of economic dispatch problem using neural network approach and comparing it with classical method

International Nuclear Information System (INIS)

Mohammadi, A.; Varahram, M.H.

2007-01-01

In this study, two methods for solving economic dispatch problems, namely Hopfield neural network and lambda iteration method are compared. Three sample of power system with 3, 6 and 20 units have been considered. The time required for CPU, for solving economic dispatch of these two systems has been calculated. It has been Shown that for on-line economic dispatch, Hopfield neural network is more efficient and the time required for Convergence is considerably smaller compared to classical methods. (author)

If You’re A Libertarian, How Come You’re So Rich?

OpenAIRE

Colin MacLeod

2012-01-01

This article examines the bearing of political philosophy on one’s personal behaviour. I review the ‘rich egalitarian problem’ posed by G.A. Cohen and consider a variant of this problem called the ‘rich socialist problem’. I argue that once we adopt a nuanced view of what adequate fidelity to one’s political principles requires there is a satisfactory solution to the rich socialist problem. Finally, focusing on Robert Nozick’s highly influential historical entitlement theory, I explain the ‘r...

HTML5 Designing Rich Internet Applications

CERN Document Server

David, Matthew

2010-01-01

Implement the powerful new multimedia and interactive capabilities offered by HTML5, including style control tools, illustration tools, video, audio, and rich media solutions. Understand how HTML5 is changing the Web development game with this full-color, project-based treatment that shows you-not just tells you-what HTML5 can do for your Web sites. Reinforce your practical understanding of the new standard with demo applications and tutorials, so that execution is one short step away. The companion website, visualizetheweb.com, is packed full of extra information, online code libraries, and

Explicit and implicit information needs of people with depression: a qualitative investigation of problems reported on an online depression support forum

Directory of Open Access Journals (Sweden)

Banfield Michelle A

2011-05-01

Full Text Available Abstract Background Health management is impeded when consumers do not possess adequate knowledge about their illness. At a public health level, consumer knowledge about depression is particularly important because depression is highly prevalent and causes substantial disability and burden. However, currently little is known about the information needs of people with depression. This study aimed to investigate the explicit and implicit information needs of users of an online depression support forum. Methods A sample of 2680 posts was systematically selected from three discussion forums on an online depression bulletin board (blueboard.anu.edu.au. Data were examined for evidence of requests for information (reflecting explicit needs and reports of past or current problems (implicit needs. Thematic analysis was conducted using a data-driven inductive approach with the assistance of NVivo 7, and instances of questions and people reporting particular types of problems were recorded. Results A total of 134 participants with personal experience of depression contributed to the data analysed. Six broad themes represented participant queries and reported problems: Understanding depression; disclosure and stigma; medication; treatment and services; coping with depression; and comorbid health problems. A variety of specific needs were evident within these broad thematic areas. Some people (n = 46 expressed their information needs by asking direct questions (47 queries but the majority of needs were expressed implicitly (351 problems by the 134 participants. The most evident need for information related to coping with depression and its consequences, followed by topics associated with medication, treatment and services. Conclusions People with depression have substantial unmet information needs and require strategies to deal with the difficulties they face. They require access to high quality and relevant online resources and professionals; thus, there is

Electronic assessment of clinical reasoning in clerkships: A mixed-methods comparison of long-menu key-feature problems with context-rich single best answer questions

NARCIS (Netherlands)

Huwendiek, S.; Reichert, F.; Duncker, C.; Leng, B.A. De; Vleuten, C.P.M. van der; Muijtjens, A.M.; Bosse, H.M.; Haag, M.; Hoffmann, G.F.; Tonshoff, B.; Dolmans, D.

2017-01-01

BACKGROUND: It remains unclear which item format would best suit the assessment of clinical reasoning: context-rich single best answer questions (crSBAs) or key-feature problems (KFPs). This study compared KFPs and crSBAs with respect to students' acceptance, their educational impact, and

Online Digital Archives Technology That Supports Rich, Student-Centered Learning Experiences

Science.gov (United States)

Hofer, Mark

2004-01-01

Today's students watch the newest movie trailers on the Web, share music files, play video games with other players over the Internet, and swap digital pictures of the latest teen idols. Donald Tapscott points out in his book Growing Up Digital that as this rich multimedia experience becomes more a part of students' lives outside of school, they…

Online gaming addiction? Motives predict addictive play behavior in massively multiplayer online role-playing games.

Science.gov (United States)

Kuss, Daria J; Louws, Jorik; Wiers, Reinout W

2012-09-01

Recently, there have been growing concerns about excessive online gaming. Playing Massively Multiplayer Online Role-Playing Games (MMORPGs) appears to be particularly problematic, because these games require a high degree of commitment and time investment from the players to the detriment of occupational, social, and other recreational activities and relations. A number of gaming motives have been linked to excessive online gaming in adolescents and young adults. We assessed 175 current MMORPG players and 90 nonplayers using a Web-based questionnaire regarding their gaming behavior, problems as consequences of gaming, and game motivations and tested their statistical associations. Results indicated that (a) MMORPG players are significantly more likely to experience gaming-related problems relative to nonplayers, and that (b) the gaming motivations escapism and mechanics significantly predicted excessive gaming and appeared as stronger predictors than time investment in game. The findings support the necessity of using measures that distinguish between different types of online games. In addition, this study proves useful regarding the current discussion on establishing (online) gaming addiction as a diagnosis in future categorizations of psychopathology.

Online and offline video game use in adolescents: measurement invariance and problem severity

OpenAIRE

Smohai, M; Urbán, R; Griffiths, MD; Király, O; Mirnics, Z; Vargha, A; Demetrovics, Z

2017-01-01

Background:\\ud \\ud Despite the increasing popularity of videogame playing, little is known about the similarities and differences between online and offline videogame players. However, the characteristics of online and offline gaming might predispose different pattern of problematic use.\\ud \\ud Objectives:\\ud \\ud The aims of this study were to (i) test applicability and the measurement invariance of the previously developed Problematic Online Gaming Questionnaire (POGQ) in both online and off...

EFFECTIVENESS OF MULTIMEDIA IN LEARNING & TEACHING DATA STRUCTURES ONLINE

Directory of Open Access Journals (Sweden)

Sahalu JUNAIDU

2008-10-01

Full Text Available Online electronic education is now being widely accepted as a major viable component of higher education. This is fuelled by the emergence of worldwide information and computer communications technologies. However, online education is not being adopted in science and engineering subjects as widely as in other fields because of the idiosyncrasies of some science and engineering-based courses. For online engineering education to be broadly accepted and utilized, the quality of online courses must, amongst other things, be comparable to or better than those of traditional face-to-face classroom education. This paper explores and reports on the importance of creating multimedia-rich course content and the important role that animations can play in creating a successful online learning experience. Results of our study on an online data structures course over five years offerings show that students consistently perform much better in questions requiring application of material taught in carefully animated algorithms. These results should carry over to other educational environments.

Neutron rich nuclei

International Nuclear Information System (INIS)

Foucher, R.

1979-01-01

If some β - emitters are particularly interesting to study in light, medium, and heavy nuclei, another (and also) difficult problem is to know systematically the properties of these neutron rich nuclei far from the stability line. A review of some of their characteristics is presented. How far is it possible to be objective in the interpretation of data is questioned and implications are discussed

Online role-playing for faculty development.

Science.gov (United States)

Ladhani, Zahra; Chhatwal, Jugesh; Vyas, Rashmi; Iqbal, Mobeen; Tan, Christina; Diserens, Deborah

2011-03-01

There has been a rapid growth of online teaching in the past few years, yet the implementation of role-play for formal educational activities in an online setting is growing more slowly. The use of online role-playing for the development of health professions educators is virtually un-documented in the literature. In the project reported here we use role-playing as a method to motivate and increase active participation in an online web-based discussion on community-based medical education (CBME). The Foundation for Advancement of International Medical Education & Research (FAIMER(®) ) Institute hosts virtual group discussions for fellows as part of its fellowship programmes, in order to deepen their knowledge base in health professions education and research. In June 2008, a group of seven FAIMER(®) fellows and faculty members moderated an online discussion on CBME using an online role-play exercise with other fellows and faculty members. Out of a total of 102 fellows, 36 (35.3%) participated actively, which exceeded the typical percentage of list server participation. In addition, a rich discussion resulted in a comprehensive report on the goals, challenges, logistical components, role of Health Ministry policy and the possible ethical mandate of CBME in developing countries. Online role-play encouraged distributed participation among a highly diverse international group of participants, supporting the conclusion that role-playing can be used effectively with mid-career health professional faculty members in the online environment. © Blackwell Publishing Ltd 2011.

Support Services for Remote Users of Online Public Access Catalogs.

Science.gov (United States)

Kalin, Sally W.

1991-01-01

Discusses the needs of remote users of online public access catalogs (OPACs). User expectations are discussed; problems encountered by remote-access users are examined, including technical problems and searching problems; support services are described, including instruction, print guides, and online help; and differences from the needs of…

Teaching U.S. History Online: Problems and Prospects

Science.gov (United States)

Lyons, John F.

2004-01-01

The author writes that, while teaching online can be problematic, a history instructor can still create an exciting and interactive learning experience for both teacher and students. To accomplish this, a history instructor needs a large degree of technical knowledge, or at least technical help, good organizational skills, and empathy with the…

ONLINE PROCUREMENT IN SME`s

Directory of Open Access Journals (Sweden)

Daniela ICHIM

2017-12-01

Full Text Available E-Marketplaces are new business places for buying, selling products and services in many industries to support customers. The emergence of business-to-business (B2B in the online environment has opened up opportunities for effective online transactions between businesses. Research in this area is not enough to offer only fragmented perspectives in this area. Therefore, the targeted research problem was designed to investigate how business performance of online B2B purchases can be analyzed. The proposed study focuses on the online procurement in. Specifically, they try to answer questions such as: Does site, product, and vendor characteristics affect the online procurement in? Does online buying experience influence online procurement by? Participants are that use the Internet to procure products or services. Study respondents were SME managers who believe that online procurement will save time, money and effort, reducing costs.

Liquid chromatography-electrospray ionization tandem mass spectrometry for on-line characterization, monitoring and isotopic profiling of the main selenium-metabolite in human urine after consumption of Se-rich and Se-enriched food

International Nuclear Information System (INIS)

Dumont, Emmie; Ogra, Yasumitsu; Suzuki, Kazuo T.; Vanhaecke, Frank; Cornelis, Rita

2006-01-01

The metabolism of selenium (Se) in the human body has yet not completely been unravelled and hence, an efficient method for characterization and on-line monitoring of the main Se-compound in human urine after consumption of Se-rich food was developed. Total Se-concentration in human urine after consumption of several Se-rich products was measured with inductively coupled plasma mass spectrometry (ICP-MS). The highest Se concentration in urine was observed after 4-10 h. The urine samples were brought onto a reversed phase column and the Se was detected by ICP-MS. Parameters for liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS-MS) measurements were optimized by using commercially available sugars, because it is known that some of the urinary metabolites contain a sugar moiety. In order to characterize the predominant Se-metabolite, it was necessary to extensively clean-up the sample and preconcentrate the species. The main metabolite was measured on its precursor ion on three different m/z according to three isotopes of Se. Relative peak surfaces matched the relative abundances of the isotopes. The product ions could be measured in a human urine sample in accordance to the product ions of the commercially available sugars. Moreover, the evidence of a selenosugar was demonstrated by the use of the Se-isotopes when measuring the product ions. LC-ESI-MS-MS was proven to be very efficient for the characterization of the main urinary Se-metabolite and can be used for on-line monitoring of the compound in urine samples. The method can be extended for clinical screening after consumption of Se-(en)rich(ed) food by use of the Se-isotopic profile and/or of the typical product ions of (methyl)-N-acetyl-hexosamines

SOFTWARE SUPPORT FOR RICH PICTURES

DEFF Research Database (Denmark)

Valente, Andrea; Marchetti, Emanuela

2010-01-01

Rich pictures (RP) are common in object-oriented analysis and design courses, but students seem to have problems in integrating them in their projects' workflow. A new software tool is being developed, specific for RP authoring. To better understand students' issues and working practice with RP...

Robust online face tracking-by-detection

NARCIS (Netherlands)

Comaschi, F.; Stuijk, S.; Basten, T.; Corporaal, H.

2016-01-01

The problem of online face tracking from unconstrained videos is still unresolved. Challenges range from coping with severe online appearance variations to coping with occlusion. We propose RFTD (Robust Face Tracking-by-Detection), a system which combines tracking and detection into a single

‘Regulating’ Online Data Privacy

Directory of Open Access Journals (Sweden)

Paul Reid

2004-09-01

Full Text Available With existing data protection laws proving inadequate in the fight to protect online data privacy and with the offline law of privacy in a state of change and uncertainty, the search for an alternative solution to the important problem of online data privacy should commence. With the inherent problem of jurisdiction that the Internet presents, such a solution is best coming from a multi-national body with the power to approximate laws in as many jurisdictions as possible, with a recognised authority and a functioning enforcement mechanism. The European Union is such a body and while existing data protection laws stem from the EU, they were neither tailored specifically for the Internet and the online world, nor do they fully harmonise the laws of the member states – an essential element in Internet regulation. Current laws face further problems with the ease and frequency of data transfers outwith the EU. An Internet specific online data privacy regulation would fully approximate the laws of the twenty five member states and, if suitably drafted, could perhaps, drawing upon EC competition jurisprudence, achieve a degree of extraterritoriality, thus combating the problem posed by transfers outwith the EU. Any solution, however, is dependant upon our political leaders having the political will and courage to reach and agreement upon any new law.

The Role of the e-Tutor in Synchronous Online Problem-Based Learning: A Study in a Master Public Health Programme

Science.gov (United States)

de Jong, Nynke; Verstegen, Daniëlle M. L.; Könings, Karen D.

2018-01-01

The aim of this study is to compare the role of the tutor in an online and a face-to-face problem-based learning (PBL) session to shed light on potential differences of the tutor role in both settings. In this practice-based study we compared the two groups with the same tutor undertaking the same module. Students completed questionnaires about…

Profiling Online Poker Players: Are Executive Functions Correlated with Poker Ability and Problem Gambling?

Science.gov (United States)

Schiavella, Mauro; Pelagatti, Matteo; Westin, Jerker; Lepore, Gabriele; Cherubini, Paolo

2018-01-12

Poker playing and responsible gambling both entail the use of the executive functions (EF), which are higher-level cognitive abilities. This study investigated if online poker players of different ability showed different performances in their EF and if so, which functions were the most discriminating for their playing ability. Furthermore, it assessed if the EF performance was correlated to the quality of gambling, according to self-reported questionnaires (PGSI, SOGS, GRCS). Three poker experts evaluated anonymized poker hand history files and, then, a trained professional administered an extensive neuropsychological test battery. Data analysis determined which variables of the tests correlated with poker ability and gambling quality scores. The highest correlations between EF test results and poker ability and between EF test results and gambling quality assessment showed that mostly different clusters of executive functions characterize the profile of the strong(er) poker player and those ones of the problem gamblers (PGSI and SOGS) and the one of the cognitions related to gambling (GRCS). Taking into consideration only the variables overlapping between PGSI and SOGS, we found some key predictive factors for a more risky and harmful online poker playing: a lower performance in the emotional intelligence competences (Emotional Quotient inventory Short) and, in particular, those grouped in the Intrapersonal scale (emotional self-awareness, assertiveness, self-regard, independence and self-actualization).

Online and face-to-face role-play simulations in promoting social work students’ argumentative problem solving

Directory of Open Access Journals (Sweden)

Kati Vapalahti

2015-03-01

Full Text Available This paper reports on a teaching experiment in which social work students (n=38 practiced problem solving through argumentative tasks. A teaching experiment was carried out at a Mikkeli University of Applied Sciences in Finland in connection with a course concerning preventative work against alcohol- and drug abuse. This quasi- experimental study investigated whether role-play simulation conducted either online (15 students or face-to-face (14 students improved students’ problem solving on social issues. As a pre-test, the students wrote an essay after having watched a dramatization of problematic cases on elderly people’s use of alcohol. The students also attended lectures (30 x 45 min on the effect of substance abuse and preventive work, and after the role-play simulation they wrote another essay (post-test. Nine controls wrote an essay without participating in the role-play simulation. Lastly, the students filled out feedback questionnaires.

Online Information Search Performance and Search Strategies in a Health Problem-Solving Scenario.

Science.gov (United States)

Sharit, Joseph; Taha, Jessica; Berkowsky, Ronald W; Profita, Halley; Czaja, Sara J

2015-01-01

Although access to Internet health information can be beneficial, solving complex health-related problems online is challenging for many individuals. In this study, we investigated the performance of a sample of 60 adults ages 18 to 85 years in using the Internet to resolve a relatively complex health information problem. The impact of age, Internet experience, and cognitive abilities on measures of search time, amount of search, and search accuracy was examined, and a model of Internet information seeking was developed to guide the characterization of participants' search strategies. Internet experience was found to have no impact on performance measures. Older participants exhibited longer search times and lower amounts of search but similar search accuracy performance as their younger counterparts. Overall, greater search accuracy was related to an increased amount of search but not to increased search duration and was primarily attributable to higher cognitive abilities, such as processing speed, reasoning ability, and executive function. There was a tendency for those who were younger, had greater Internet experience, and had higher cognitive abilities to use a bottom-up (i.e., analytic) search strategy, although use of a top-down (i.e., browsing) strategy was not necessarily unsuccessful. Implications of the findings for future studies and design interventions are discussed.

Relationships between online gambling, mental health, and substance use: a review.

Science.gov (United States)

Scholes-Balog, Kirsty E; Hemphill, Sheryl A

2012-12-01

This review deals with the published literature to date while examining the relationship between online gambling, mental health problems, and substance use. Online gambling, particularly problematic gambling online, was found to be associated with poor mental health and use of various substances. Recent preliminary evidence also suggests that online gamblers may be at a greater risk of some substance use and mental health problems, relative to nononline gamblers. However, many of the reviewed studies were limited by investigation of online gambling behaviors only; these samples may have inadvertently comprised individuals who engage in both online and nononline gambling. Future research is required to address these limitations.

Motivating Learning in Mathematics Through Collaborative Problem Solving: A Focus on Using Rich Tasks

Directory of Open Access Journals (Sweden)

Nasreen Hussain

2014-06-01

Full Text Available This paper is based on the concept that lively and interactive math classes are possible by incorporating rich tasks to meet the needs of students operating at different levels in the classrooms. A study was carried out to find out the impact on learning and motivation of using rich tasks at secondary level in the maths class by incorporating co-operative learning. Qualitative research paradigm was opted for the study using an action research approach and the data were collected through two semi-structured interviews conducted at the onset of the research and after the intervention. Few important findings indicate that rich tasks demand different levels of challenge and extend opportunities to those students who need them.

Cyber security issues in online games

Science.gov (United States)

Zhao, Chen

2018-04-01

With the rapid development of the Internet, online gaming has become a way of entertainment for many young people in the modern era. However, in recent years, cyber security issues in online games have emerged in an endless stream, which have also caused great attention of many game operators. Common cyber security problems in the game include information disclosure and cyber-attacks. These problems will directly or indirectly cause economic losses to gamers. Many gaming companies are enhancing the stability and security of their network or gaming systems in order to enhance the gaming user experience. This article has carried out the research of the cyber security issues in online games by introducing the background and some common cyber security threats, and by proposing the latent solution. Finally, it speculates the future research direction of the cyber security issues of online games in the hope of providing feasible solution and useful information for game operators.

Analysis of Context Dependence in Social Interaction Networks of a Massively Multiplayer Online Role-Playing Game

OpenAIRE

Son, Seokshin; Kang, Ah Reum; Kim, Hyun-chul; Kwon, Taekyoung; Park, Juyong; Kim, Huy Kang

2012-01-01

Rapid advances in modern computing and information technology have enabled millions of people to interact online via various social network and gaming services. The widespread adoption of such online services have made possible analysis of large-scale archival data containing detailed human interactions, presenting a very promising opportunity to understand the rich and complex human behavior. In collaboration with a leading global provider of Massively Multiplayer Online Role-Playing Games (...

Analyzing the Dynamics of Communication in Online Social Networks

Science.gov (United States)

de Choudhury, Munmun; Sundaram, Hari; John, Ajita; Seligmann, Doree Duncan

This chapter deals with the analysis of interpersonal communication dynamics in online social networks and social media. Communication is central to the evolution of social systems. Today, the different online social sites feature variegated interactional affordances, ranging from blogging, micro-blogging, sharing media elements (i.e., image, video) as well as a rich set of social actions such as tagging, voting, commenting and so on. Consequently, these communication tools have begun to redefine the ways in which we exchange information or concepts, and how the media channels impact our online interactional behavior. Our central hypothesis is that such communication dynamics between individuals manifest themselves via two key aspects: the information or concept that is the content of communication, and the channel i.e., the media via which communication takes place. We present computational models and discuss large-scale quantitative observational studies for both these organizing ideas. First, we develop a computational framework to determine the "interestingness" property of conversations cented around rich media. Second, we present user models of diffusion of social actions and study the impact of homophily on the diffusion process. The outcome of this research is twofold. First, extensive empirical studies on datasets from YouTube have indicated that on rich media sites, the conversations that are deemed "interesting" appear to have consequential impact on the properties of the social network they are associated with: in terms of degree of participation of the individuals in future conversations, thematic diffusion as well as emergent cohesiveness in activity among the concerned participants in the network. Second, observational and computational studies on large social media datasets such as Twitter have indicated that diffusion of social actions in a network can be indicative of future information cascades. Besides, given a topic, these cascades are often a

A randomized trial of teen online problem solving for improving executive function deficits following pediatric traumatic brain injury.

Science.gov (United States)

Wade, Shari L; Walz, Nicolay C; Carey, JoAnne; Williams, Kendra M; Cass, Jennifer; Herren, Luke; Mark, Erin; Yeates, Keith Owen

2010-01-01

To examine the efficacy of teen online problem solving (TOPS) in improving executive function (EF) deficits following traumatic brain injury (TBI) in adolescence. Families of adolescents (aged 11-18 years) with moderate to severe TBI were recruited from the trauma registry of 2 tertiary-care children's hospitals and then randomly assigned to receive TOPS (n = 20), a cognitive-behavioral, skill-building intervention, or access to online resources regarding TBI (Internet resource comparison; n = 21). Parent and teen reports of EF were assessed at baseline and a posttreatment follow-up (mean = 7.88 months later). Improvements in self-reported EF skills were moderated by TBI severity, with teens with severe TBI in the TOPS treatment reporting significantly greater improvements than did those with severe TBI in the Internet resource comparison. The treatment groups did not differ on parent ratings of EF at the follow up. Findings suggest that TOPS may be effective in improving EF skills among teens with severe TBI.

MEDIA KONSULTASI ONLINE SEBAGAI ALTERNATIF UPAYA PENANGANAN MASALAH REMAJA

Directory of Open Access Journals (Sweden)

Ira Mirawati

2016-05-01

agar media konsultasi online tersebut menggunakan nama yang dekat dengan kehidupan remaja, bukan  nama formal yang mencerminkan kelembagaan. Berdasarkan hasil penelitian tersebut, maka peneliti kemudian mengembangkan www.sobatmu.com sebagai media konsultasi online untuk pada remaja. Kata kunci: Media Konsultasi Online, Bimbingan Konseling, Masalah Remaja Abstract. Nowadays, teenagers need for career guidance and counseling are increasing, along with the diversity of their problems. In the schools and universities, the need for consultation has also increased, especially since the University entrance examination using Seleksi Nasional Masuk Perguruan Tinggi (SNMPTN known as “school path entrance”. The problem is, for various reasons, not all teenagers can reveal or consult their problems using face to face communication easily. On the other hand social media user among adolescents increased rapidly. The latest data from Indonesian Internet Service Provider Association (APJII, indicate that 49% from 88.1 million Indonesian internet users are adolescent. Therefore, it is the right step for us to provide online consultation media which can help them to consult the problems, anytime and anywhere. This research objectives are to describe the teenagers need of online consultation media, and develop its prototype. The results showed that beside of career guidance, the teenager problems are about friendship, love, family, and financial. Most respondents had posted their problems in social media, just to release the pressure, without expecting feedback from friends or their followers. Almost all respondents are interested to use online consultation service. They hope, the online consultations can be done personally and privately, without the ability of another internet user to read their consultation history. In addition, respondents suggested that online consultation media name using a popular name, close to the life of a teenager, not using a formal name that reflects the

Managing Trust in Online Social Networks

Science.gov (United States)

Bhuiyan, Touhid; Josang, Audun; Xu, Yue

In recent years, there is a dramatic growth in number and popularity of online social networks. There are many networks available with more than 100 million registered users such as Facebook, MySpace, QZone, Windows Live Spaces etc. People may connect, discover and share by using these online social networks. The exponential growth of online communities in the area of social networks attracts the attention of the researchers about the importance of managing trust in online environment. Users of the online social networks may share their experiences and opinions within the networks about an item which may be a product or service. The user faces the problem of evaluating trust in a service or service provider before making a choice. Recommendations may be received through a chain of friends network, so the problem for the user is to be able to evaluate various types of trust opinions and recommendations. This opinion or recommendation has a great influence to choose to use or enjoy the item by the other user of the community. Collaborative filtering system is the most popular method in recommender system. The task in collaborative filtering is to predict the utility of items to a particular user based on a database of user rates from a sample or population of other users. Because of the different taste of different people, they rate differently according to their subjective taste. If two people rate a set of items similarly, they share similar tastes. In the recommender system, this information is used to recommend items that one participant likes, to other persons in the same cluster. But the collaborative filtering system performs poor when there is insufficient previous common rating available between users; commonly known as cost start problem. To overcome the cold start problem and with the dramatic growth of online social networks, trust based approach to recommendation has emerged. This approach assumes a trust network among users and makes recommendations

Barter Online Network

Directory of Open Access Journals (Sweden)

Van Ngoc Tran

2015-12-01

Full Text Available Barter is the direct exchange of goods or services without using a medium of exchange, such as money. Barter faced a number of limitations, and according to Smith (1776, these limitations led to the emergence of money. However, trading with money also exposes traders to the problems of monetary economy such as inflation, deflation, currency de-valuation, and currency exchange fluctuation. According to Statista.com (2015, in 2016, global Business to Customer (B2C e-commerce sales will reach 1.92 trillion US dollars. On the other hand, online barter solutions are rare on the market. The only attempts to tackle online barter are mobile applications, carried out by small businesses. The market gap is caused by the unsolved inefficiencies of barter. The aim of this thesis is to identify the problems of barter, propose an IT solution for the problems of barter, and finally, produce an artefact, which is the realisation of the proposed IT solution by utilising computer systems and computer algorithms.

Online Identities and Social Networking

Science.gov (United States)

Maheswaran, Muthucumaru; Ali, Bader; Ozguven, Hatice; Lord, Julien

Online identities play a critical role in the social web that is taking shape on the Internet. Despite many technical proposals for creating and managing online identities, none has received widespread acceptance. Design and implementation of online identities that are socially acceptable on the Internet remains an open problem. This chapter discusses the interplay between online identities and social networking. Online social networks (OSNs) are growing at a rapid pace and has millions of members in them. While the recent trend is to create explicit OSNs such as Facebook and MySpace, we also have implicit OSNs such as interaction graphs created by email and instant messaging services. Explicit OSNs allow users to create profiles and use them to project their identities on the web. There are many interesting identity related issues in the context of social networking including how OSNs help and hinder the definition of online identities.

Excessive Gambling and Online Gambling Communities.

Science.gov (United States)

Sirola, Anu; Kaakinen, Markus; Oksanen, Atte

2018-04-05

The Internet provides an accessible context for online gambling and gambling-related online communities, such as discussion forums for gamblers. These communities may be particularly attractive to young gamblers who are active Internet users. The aim of this study was to examine the use of gambling-related online communities and their relevance to excessive gambling among 15-25-year-old Finnish Internet users (N = 1200). Excessive gambling was assessed by using the South Oaks Gambling Screen. Respondents were asked in a survey about their use of various kinds of gambling-related online communities, and sociodemographic and behavioral factors were adjusted. The results of the study revealed that over half (54.33%) of respondents who had visited gambling-related online communities were either at-risk gamblers or probable pathological gamblers. Discussion in these communities was mainly based on sharing gambling tips and experiences, and very few respondents said that they related to gambling problems and recovery. In three different regression models, visiting gambling-related online communities was a significant predictor for excessive gambling (with 95% confidence level) even after adjusting confounding factors. The association of visiting such sites was even stronger among probable pathological gamblers than among at-risk gamblers. Health professionals working with young people should be aware of the role of online communities in terms of development and persistence of excessive gambling. Monitoring the use of online gambling communities as well as utilizing recovery-oriented support both offline and online would be important in preventing further problems. Gambling platforms should also include warnings about excessive gambling and provide links to helpful sources.

Leveraging data rich environments using marketing analytics

OpenAIRE

Holtrop, Niels

2017-01-01

With the onset of what is popularly known as “big data”, increased attention is being paid to creating value from these data rich environments. Within the field of marketing, the analysis of customer and market data supported by models is known as marketing analytics. The goal of these analyses is to enhance managerial decision making regarding marketing problems. However, before these data rich environments can be used to guide managerial decision making, firms need to grasp the process of d...

Online Finding Aids: Are They Practical?

Science.gov (United States)

Hostetter, Christina J.

2004-01-01

This article explores the uses, practicality, and problems involved in creating online finding aids by state-funded university archivists across the nation. It examines various aspects of online finding aids such as financial considerations, its importance as a research tool, timelines, demographics, and use. The more technical side is also…

Facilitating Service Learning in the Online Technical Communication Classroom

Science.gov (United States)

Nielsen, Danielle

2016-01-01

Drawing from the author's experience teaching online technical communication courses with an embedded service-learning component, this essay opens the discussion to the potential problems involved in designing online service-learning courses and provides practical approaches to integrating service learning into online coursework. The essay…

DOE-EPRI On-Line Monitoring Implementation Guidelines

International Nuclear Information System (INIS)

E. Davis, R. Bickford

2003-01-01

Industry and EPRI experience at several plants has shown on-line monitoring to be very effective in identifying out-of-calibration instrument channels or indications of equipment-degradation problems. The EPRI implementation project for on-line monitoring has demonstrated the feasibility of on-line monitoring at several participating nuclear plants. The results have been very encouraging, and substantial progress is anticipated in the coming years

Developing a Cloud-Based Online Geospatial Information Sharing and Geoprocessing Platform to Facilitate Collaborative Education and Research

Science.gov (United States)

Yang, Z. L.; Cao, J.; Hu, K.; Gui, Z. P.; Wu, H. Y.; You, L.

2016-06-01

Efficient online discovering and applying geospatial information resources (GIRs) is critical in Earth Science domain as while for cross-disciplinary applications. However, to achieve it is challenging due to the heterogeneity, complexity and privacy of online GIRs. In this article, GeoSquare, a collaborative online geospatial information sharing and geoprocessing platform, was developed to tackle this problem. Specifically, (1) GIRs registration and multi-view query functions allow users to publish and discover GIRs more effectively. (2) Online geoprocessing and real-time execution status checking help users process data and conduct analysis without pre-installation of cumbersome professional tools on their own machines. (3) A service chain orchestration function enables domain experts to contribute and share their domain knowledge with community members through workflow modeling. (4) User inventory management allows registered users to collect and manage their own GIRs, monitor their execution status, and track their own geoprocessing histories. Besides, to enhance the flexibility and capacity of GeoSquare, distributed storage and cloud computing technologies are employed. To support interactive teaching and training, GeoSquare adopts the rich internet application (RIA) technology to create user-friendly graphical user interface (GUI). Results show that GeoSquare can integrate and foster collaboration between dispersed GIRs, computing resources and people. Subsequently, educators and researchers can share and exchange resources in an efficient and harmonious way.

Socializing by Gaming : Revealing Social Relationships in Multiplayer Online Games

NARCIS (Netherlands)

Jia, L.; Shen, S.; van de Bovenkamp, R.; Iosup, A.; Kuipers, F.A.; Epema, D.H.J.

2015-01-01

Multiplayer Online Games (MOGs) like Defense of the Ancients and StarCraft II have attracted hundreds of millions of users who communicate, interact, and socialize with each other through gaming. In MOGs, rich social relationships emerge and can be used to improve gaming services such as match

Online Gambling among Treatment-Seeking Patients in Singapore: A Cross-Sectional Study

OpenAIRE

Melvyn Zhang; Yi Yang; Song Guo; Chris Cheok; Kim Eng Wong; Gomathinayagam Kandasami

2018-01-01

Given that technology has greatly facilitated easier access to gambling in previous years, it is timely to look in-depth into online gambling activities and behaviors. There have been several studies that examined online gambling. However, most of the current studies to date have focused on determining the prevalence and the epidemiology of problem gambling arising from online gambling in Western cohorts. There remains a paucity of research looking at the problem of online gambling among Asia...

Regulation of Motivation: Students' Motivation Management in Online Collaborative Groupwork

Science.gov (United States)

Xu, Jianzhong; Du, Jianxia

2013-01-01

Background: Online learning is becoming a global phenomenon and has a steadily growing influence on how learning is delivered at universities worldwide. Motivation of students, however, has become one of the most serious problems in one important aspect of online learning--online collaborative groupwork or online group homework. It is surprising…

Impeding Students' Efforts to Cheat in Online Classes

Science.gov (United States)

Hearn Moore, Paula; Head, J. Derrick; Griffin, Richard B.

2017-01-01

This paper identifies several methods a student could use to cheat while enrolled in an online course. Problems encountered in conducting an online course and in administering an online exam involve: (1) identifying the test taker, (2) preventing the theft of the exam, (3) combating the unauthorized use of textbooks and/or notes, (4) preparing an…

The attitudes, feelings, and experiences of online gamers: a qualitative analysis.

Science.gov (United States)

Hussain, Zaheer; Griffiths, Mark D

2009-12-01

The playing of massively multiplayer online role-playing games (MMORPGs) is now a highly popular leisure activity. The present study set out to explore the attitudes, experiences, and feelings of online gamers. The study entailed 71 interviews with online gamers (52 males, 19 females) from 11 different countries. Six main themes emerged from the analyses of the interview transcripts: (a) online gaming and integration into day-to-day lives; (b) online gaming, excessive play, and problems; (c) addiction; (d) psychosocial impact of online gaming; (e) online gaming, dissociation, and time loss; and (f) online gaming and the alleviation of negative feelings and mood states. These findings specifically showed how gamers used MMORPGs to alleviate negative feelings and provided detailed descriptions of personal problems that had arisen due to playing MMORPGs. The implications of these findings are discussed in relation to previous qualitative and quantitative research in the area.

[Online gaming. Potential risk and prevention programs].

Science.gov (United States)

Malischnig, Doris

2014-12-01

Online gaming is more and more common and increasingly accessible. Due to a lack of social control the participation could be a potential risk for certain customers. The given article focuses on prevention measures that are provided by the Austrian online gaming operator, the Austrian Lotteries, provider of the online gaming platform win2day, in the light of the specifics of Internet gaming in order to avoid problems with gaming.

[The stakes of online gambling in Canada: a public health analysis].

Science.gov (United States)

Papineau, Elisabeth; Leblond, Jean

2011-01-01

Available data show that online gamblers spend more money and dedicate more time to playing compared to gamblers who do not play online, and are more likely to experience gambling problems. Among online players, young people and poker players show higher rates of gambling problems. These observations can be explained in part by such dangerous aspects of online gambling (and also electronic gaming machines) as: immediate and convenient accessibility; ability to pay electronically and to play on credit; anonymity; and the possibility for players to consume alcohol or other drugs while playing. These are elements that could facilitate the development or the intensification of problem gambling. This being said, the public discourse about the inevitability of legalized online gambling is quite unanimous and built upon such arguments as: the imperative duty of the state to protect the population against the dangers of the online gambling black market; and the fact that the medium in itself provides excellent consumer safeguards. A growing number of legislators are following the trend and choosing to establish state control over online gambling. We present some epidemiological and analytical data that challenge some of these assertions and decisions. We recommend a better integration of public health arguments into the commercialization and marketing of online gambling.

Theory and practice of specialised online dictionaries

DEFF Research Database (Denmark)

Fuertes-Olivera, Pedro A.; Tarp, Sven

The book deals with various aspects of specialised lexicography: the discipline and its academic status; the function theory and the various arguments against it; competing theories, especially theories of terminography; various aspects of methodology; special problems related to online lexicogra......The book deals with various aspects of specialised lexicography: the discipline and its academic status; the function theory and the various arguments against it; competing theories, especially theories of terminography; various aspects of methodology; special problems related to online...... lexicography; and criticism of a number of existing specialised online dictionaries. Finally, the ideas put forward are exemplified by means of a detailed description of a specialised dictionary project from the planning phase to its publication, as well as recommendations for other types of specialised...

Towards Online and Transactional Relational Schema Transformations

NARCIS (Netherlands)

Wevers, L.; Hofstra, Matthijs; Tammens, Menno; Huisman, Marieke; van Keulen, Maurice

2014-01-01

In this paper, we want to draw the attention of the database community to the problem of online schema changes: changing the schema of a database without blocking concurrent transactions. We have identified important classes of relational schema transformations that we want to perform online, and we

A Recommender System for Programming Online Judges Using Fuzzy Information Modeling

Directory of Open Access Journals (Sweden)

Raciel Yera Toledo

2018-04-01

Full Text Available Programming online judges (POJs are an emerging application scenario in e-learning recommendation areas. Specifically, they are e-learning tools usually used in programming practices for the automatic evaluation of source code developed by students when they are solving programming problems. Usually, they contain a large collection of such problems, to be solved by students at their own personalized pace. The more problems in the POJ the harder the selection of the right problem to solve according to previous users performance, causing information overload and a widespread discouragement. This paper presents a recommendation framework to mitigate this issue by suggesting problems to solve in programming online judges, through the use of fuzzy tools which manage the uncertainty related to this scenario. The evaluation of the proposal uses real data obtained from a programming online judge, and shows that the new approach improves previous recommendation strategies which do not consider uncertainty management in the programming online judge scenarios. Specifically, the best results were obtained for short recommendation lists.

Penjualan on-line berbasis media sosial dalam perspektif ekonomi Islam

Directory of Open Access Journals (Sweden)

M. Nur Riyanto Al-Arif

2013-06-01

Full Text Available Contemporary transactions along with the development of existing technologies have given rise to other forms of trading i.e. on-line trading. This paper aims to look at how the Islamic economic perspectives associated with on-line trading. The method used in this paper was library research. On-line trading had fulfilled the shariah principle, i.e. al-aqid, s}i>ghah, al-ma’qu>d alaih and the goal of the transaction. The transaction models that can be adopt in trading on line are bay’ al-mura>bah}ah and bay’ al-sala>m. Trading online had several advantage for buyer and seller, but trading on-line also had several problems. So, we must to had a strategy to minimize the various problems that may arise.

Location-Routing Problem with Simultaneous Home Delivery and Customer’s Pickup for City Distribution of Online Shopping Purchases

Directory of Open Access Journals (Sweden)

Lin Zhou

2016-08-01

Full Text Available With the increasing interest in online shopping, the Last Mile delivery is regarded as one of the most expensive and pollutive—and yet the least efficient—stages of the e-commerce supply chain. To address this challenge, a novel location-routing problem with simultaneous home delivery and customer’s pickup is proposed. This problem aims to build a more effective Last Mile distribution system by providing two kinds of service options when delivering packages to customers. To solve this specific problem, a hybrid evolution search algorithm by combining genetic algorithm (GA and local search (LS is presented. In this approach, a diverse population generation algorithm along with a two-phase solution initialization heuristic is first proposed to give high quality initial population. Then, advantaged solution representation, individual evaluation, crossover and mutation operations are designed to enhance the evolution and search efficiency. Computational experiments based on a large family of instances are conducted, and the results obtained indicate the validity of the proposed model and method.

Performance optimization of an online retailer by a unique online resilience engineering algorithm

Science.gov (United States)

Azadeh, A.; Salehi, V.; Salehi, R.; Hassani, S. M.

2018-03-01

Online shopping has become more attractive and competitive in electronic markets. Resilience engineering (RE) can help such systems divert to the normal state in case of encountering unexpected events. This study presents a unique online resilience engineering (ORE) approach for online shopping systems and customer service performance. Moreover, this study presents a new ORE algorithm for the performance optimisation of an actual online shopping system. The data are collected by standard questionnaires from both expert employees and customers. The problem is then formulated mathematically using data envelopment analysis (DEA). The results show that the design process which is based on ORE is more efficient than the conventional design approach. Moreover, on-time delivery is the most important factor from the personnel's perspective. In addition, according to customers' view, trust, security and good quality assurance are the most effective factors during transactions. This is the first study that introduces ORE for electronic markets. Second, it investigates impact of RE on online shopping through DEA and statistical methods. Third, a practical approach is employed in this study and it may be used for similar online shops. Fourth, the results are verified and validated through complete sensitivity analysis.

Why do couples seek relationship help online? Description and comparison to in-person interventions.

Science.gov (United States)

Roddy, McKenzie K; Rothman, Karen; Cicila, Larisa N; Doss, Brian D

2018-04-02

Couples are increasingly utilizing newly developed online adaptations of couple therapy; however, different presenting problems could drive couples to seek either online or in-person services. This study compared the presenting problems of 151 couples seeking an online couple intervention for relationship distress (OurRelationship) with responses from 147 couples seeking in-person couple therapy. Presenting problems were generally consistent across gender and whether or not the respondent was the initial help-seeker. Online and in-person samples frequently endorsed difficulties with communication and emotional intimacy; however, they differentially endorsed trust, time together, and child/parenting difficulties. Therefore, while basing online interventions on existing couple therapies is generally supported, efforts should be made to tailor online services to meet the unique needs of this population. © 2018 American Association for Marriage and Family Therapy.

Mapping student online actions

DEFF Research Database (Denmark)

Bruun, Jesper; Jensen, Pia; Udby, Linda

The Virtual Neutrons for Teaching project (vnt.nmi3.org) has converted traditional text book material into a wiki-style online text book that contains the same text and equations as the traditionally styled text book but has added features due to the online nature. Two of these features...... their problem solving strategy. In this study, we use web analytics software to track student online behavior by recording what particular objects on particular web-pages students click on and when each click occurs. For each recorded session, we create networks based on student clicks: A directed link between...... two nodes, 1 and 2, is drawn, if the object represented by node 2 is clicked right af the object represented by node 1. Preliminary analysis of these networks show two general types of behavior: In one type, there is little interaction with the online contents. The student navigates to the page...

Uniform Page Migration Problem in Euclidean Space

Directory of Open Access Journals (Sweden)

Amanj Khorramian

2016-08-01

Full Text Available The page migration problem in Euclidean space is revisited. In this problem, online requests occur at any location to access a single page located at a server. Every request must be served, and the server has the choice to migrate from its current location to a new location in space. Each service costs the Euclidean distance between the server and request. A migration costs the distance between the former and the new server location, multiplied by the page size. We study the problem in the uniform model, in which the page has size D = 1 . All request locations are not known in advance; however, they are sequentially presented in an online fashion. We design a 2.75 -competitive online algorithm that improves the current best upper bound for the problem with the unit page size. We also provide a lower bound of 2.732 for our algorithm. It was already known that 2.5 is a lower bound for this problem.

Observation of Online Communities: A Discussion of Online and Offline Observer Roles in Studying Development, Cooperation and Coordination in an Open Source Software Environment

Directory of Open Access Journals (Sweden)

Sladjana V. Nørskov

2011-09-01

Full Text Available This paper addresses the application of observation to online settings with a special focus on observer roles. It draws on a study of online observation of a virtual community, i.e. an open source software (OSS community. The paper examines general and specific advantages and disadvantages of the observer roles in online settings by relating these roles to the same roles assumed in offline settings. The study suggests that under the right circumstances online and offline observation may benefit from being combined as they complement each other well. Quality issues and factors important to elicit trustworthy observational data from online study settings, such as OSS communities, are discussed. A proposition is made concerning how threats to credibility and transferability in relation to online observation (i.e. lack of richness and detail, risk of misunderstandings can be diminished, while maintaining the level of dependability (which is potentially high due to a greater degree of anonymity and "isolation" in online settings. The paper thus suggests that the less participative the researcher's online observer role is, the more s/he should consider introducing offline data collection techniques rather than adopting a more participative role in the observed online setting. This methodological discussion forms the basis for making a well-considered choice of online observer role rather than passively sliding into a role assigned by the setting. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs110358

Use of Sexual Material Online and At-Risk Sexual Behavior Regarding HIV/AIDS among College Students

OpenAIRE

Benavides, Raquel A.; Montero, Carolina Valdez; González, Víctor M.; Rodríguez, Dora Julia Onofre

2012-01-01

Use of sexual material online (USMO) by young people has been connected with at-risk sexual behavior for HIV/AIDS. Media Richness and Social Cognitive theories propose that rich media offer more information with interactive and audible visual content, which could have a significant impact on people’s thinking and behavior. The objective was to determine whether USMO presented by rich media has an influence on at-risk sexual behavior for HIV/AIDS. Two hundred young people participated in the s...

A History of Online Gatekeeping

OpenAIRE

Zittrain, Jonathan

2006-01-01

The brief but intense history of American judicial and legislative confrontation with problems caused by the online world has demonstrated a certain wisdom: a reluctance to intervene in ways that dramatically alter online architectures; a solicitude for the collateral damage that interventions might wreak upon innocent activity; and, in the balance, a refusal to allow unambiguously damaging activities to remain unchecked if there is a way to curtail them. The ability to regulate lightly ...

Substitution between Online and Offline Advertising: Evidence from the Carbonated Soft Drink Industry

OpenAIRE

He, Xi; Lopez, Rigoberto A.; Liu, Yizao

2015-01-01

As in previous studies on traditional media, previous work has assumed that online and offline advertising are substitutes. However, empirical evidence for this premise is lacking. This paper investigates the substitution between online advertising and offline advertising as well as the impact of the introduction of new media technology on the cost of advertising. Using a rich dataset of monthly observations for 52 carbonated soft drink brands between 2005 and 2011, we estimate a translog cos...

Our Anonymous Online Research Participants Are Not Always Anonymous: Is This a Problem?

Science.gov (United States)

Dawson, Phillip

2014-01-01

When educational research is conducted online, we sometimes promise our participants that they will be anonymous--but do we deliver on this promise? We have been warned since 1996 to be careful when using direct quotes in Internet research, as full-text web search engines make it easy to find chunks of text online. This paper details an empirical…

Educational Online Technologies in Blended Tertiary Environments: A Review of Literature

Science.gov (United States)

Tuapawa, Kimberley N.

2013-01-01

This is a review of the literature surrounding five popular media-rich educational online technologies (EOTs) currently being used by educationalists to support blended learning within tertiary environments. This review considers the following EOTs: 1) connective media, 2) interactive gaming, 3) virtual worlds, 4) web conferencing and 5) learning…

Educating the Citizen of Academia Online?

Directory of Open Access Journals (Sweden)

Mariann Solberg

2011-05-01

Full Text Available The Arctic is a vast, sparsely populated area. The demographic situation points to online distance education as a solution to support lifelong learning and to build competence in the region. An overall aim of all university education is what Hans Georg Gadamer calls Bildung, what we in Norwegian call dannelse and what Richard Rorty has called edification. A first problem to be addressed here is that in online distance learning some teachers find that is harder to support the development of the student’s voice. Being able to express oneself and to position oneself in a scientific community is vital for a well-educated graduate. Another problem in online education has been the extensive use of writing as a means in the student’s learning process. Writing is vital to academic education, but in online courses there is in general a danger of overuse. At the University of Tromsø we have tested the web conference tool Elluminate Live. This is a real-time application, integrated in the University’s learning management system (LMS, Fronter. The application enables synchronous oral dialogue, simultaneous sharing of texts, and so forth. I present our main experience with the use of Elluminate Live and discuss the extent to which this application has turned out to be helpful in developing the quality of online courses.

The Maximum Resource Bin Packing Problem

DEFF Research Database (Denmark)

Boyar, J.; Epstein, L.; Favrholdt, L.M.

2006-01-01

Usually, for bin packing problems, we try to minimize the number of bins used or in the case of the dual bin packing problem, maximize the number or total size of accepted items. This paper presents results for the opposite problems, where we would like to maximize the number of bins used...... algorithms, First-Fit-Increasing and First-Fit-Decreasing for the maximum resource variant of classical bin packing. For the on-line variant, we define maximum resource variants of classical and dual bin packing. For dual bin packing, no on-line algorithm is competitive. For classical bin packing, we find...

Online learning in repeated auctions

OpenAIRE

Weed, Jonathan; Perchet, Vianney; Rigollet, Philippe

2015-01-01

Motivated by online advertising auctions, we consider repeated Vickrey auctions where goods of unknown value are sold sequentially and bidders only learn (potentially noisy) information about a good's value once it is purchased. We adopt an online learning approach with bandit feedback to model this problem and derive bidding strategies for two models: stochastic and adversarial. In the stochastic model, the observed values of the goods are random variables centered around the true value of t...

Executive Functions and Motivation as Moderators of the Relationship Between Automatic Associations and Alcohol Use in Problem Drinkers Seeking Online Help.

Science.gov (United States)

van Deursen, Denise S; Salemink, Elske; Boendermaker, Wouter J; Pronk, Thomas; Hofmann, Wilhelm; Wiers, Reinout W

2015-09-01

Dual process models posit that problem drinking is maintained by an imbalance between relatively strong automatic processes and weak controlled processes, a combination of executive functions and motivation. Few studies have examined how the interplay between automatic processes and executive functions is affected by motivation to change. This study examined this relationship in problem drinkers seeking online help to change their alcohol use. It was expected that executive functions (i.e., working memory, response inhibition) would moderate the relationship between automatic (valence and approach) associations and alcohol use and that this effect would be stronger in individuals with strong motivation to change. A sample of 302 problem drinkers (mean age: 51.7 years) participated in this study as part of the baseline assessment before an Internet intervention. Participants completed an online version of the brief Implicit Association Test (valence and approach associations), the self-ordered pointing task (working memory), the Stroop task (response inhibition), the Readiness to Change Questionnaire (motivation to change), and the Timeline Follow-Back Questionnaire (alcohol use). Hierarchical moderated regression analysis was used to test the 4 hypothesized 3-way interactions. As expected, the interaction between valence associations and working memory only predicted alcohol use among individuals with strong motivation. This pattern was neither found for response inhibition nor for approach associations. Results provide partial support for the moderating role of motivation in the interplay between automatic processes and executive functions. Future studies should investigate this relationship in participants with the full range of motivation and alcohol use. Copyright © 2015 by the Research Society on Alcoholism.

Guidelines for Facilitating the Development of Learning Communities in Online Courses

Science.gov (United States)

Yuan, J.; Kim, C.

2014-01-01

Online learning has grown exponentially in recent years; however, dropout problem remains challenging for some online programmes. The dropout problem can be attributed to a number of reasons, with a lack of interaction between learners and the instructor constituting one of the main reasons. The lack of interaction also leads to learners'…

Radiochemical search for neutron-rich isotopes of element 107

International Nuclear Information System (INIS)

Schaedel, M.

1987-01-01

Recent mass calculations have indicated that there is a region of deformed nuclei around neutron number N=162 that is especially stable against spontaneous fission. Barrier heights of about 5 MeV for Z = 107 nuclides can be extrapolated. To search for new, neutron-rich isotopes of element 107 in radiochemical experiments with 254 Es as a target an on-line chemical separation of element 107 (EKA-Rhenium), especially from the actinide elements is needed. An on-line gas-phase chemistry was developed with the homolog Re based on the volatility of the oxide which is transported in an O 2 containing atmosphere along a temperature gradient in a quartz tube and is condensed onto a thin Ta coated Ni-foil. The authors applied this technique in two series of experiments with their rotating wheel on-line gas-phase chemistry apparatus at the 88-inch cyclotron where they irradiated 254 Es as a target with 93 MeV and 96 MeV 16 O ions to search for 266 107. The assignment of the observed alpha events between 8 and 9 MeV to possibly (1) non actinide contaminants like 212 Po, (2) known isotopes of heavy elements like 261 105, or (3) a new isotope will be discussed

Online social network data as sociometric markers.

Science.gov (United States)

Binder, Jens F; Buglass, Sarah L; Betts, Lucy R; Underwood, Jean D M

2017-10-01

Data from online social networks carry enormous potential for psychological research, yet their use and the ethical implications thereof are currently hotly debated. The present work aims to outline in detail the unique information richness of this data type and, in doing so, to support researchers when deciding on ethically appropriate ways of collecting, storing, publishing, and sharing data from online sources. Focusing on the very nature of social networks, their structural characteristics, and depth of information, we provide a detailed and accessible account of the challenges associated with data management and data storage. In particular, the general nonanonymity of network data sets is discussed, and an approach is developed to quantify the level of uniqueness that a particular online network bestows upon the individual maintaining it. Using graph enumeration techniques, we show that comparatively sparse information on a network is suitable as a sociometric marker that allows for the identification of an individual from the global population of online users. The impossibility of anonymizing specific types of network data carries implications for ethical guidelines and research practice. At the same time, network uniqueness opens up opportunities for novel research in psychology. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Online Feature Transformation Learning for Cross-Domain Object Category Recognition.

Science.gov (United States)

Zhang, Xuesong; Zhuang, Yan; Wang, Wei; Pedrycz, Witold

2017-06-09

In this paper, we introduce a new research problem termed online feature transformation learning in the context of multiclass object category recognition. The learning of a feature transformation is viewed as learning a global similarity metric function in an online manner. We first consider the problem of online learning a feature transformation matrix expressed in the original feature space and propose an online passive aggressive feature transformation algorithm. Then these original features are mapped to kernel space and an online single kernel feature transformation (OSKFT) algorithm is developed to learn a nonlinear feature transformation. Based on the OSKFT and the existing Hedge algorithm, a novel online multiple kernel feature transformation algorithm is also proposed, which can further improve the performance of online feature transformation learning in large-scale application. The classifier is trained with k nearest neighbor algorithm together with the learned similarity metric function. Finally, we experimentally examined the effect of setting different parameter values in the proposed algorithms and evaluate the model performance on several multiclass object recognition data sets. The experimental results demonstrate the validity and good performance of our methods on cross-domain and multiclass object recognition application.

An educational experience with online teaching – not a best practice

DEFF Research Database (Denmark)

Kolbæk, Ditte; Nortvig, Anne-Mette

2017-01-01

Problem- and Project-Based Learning (PBL) is a widely used pedagogical method in higher education. Although PBL encourages self-directed learning and works with the students’ own projects and problems, it also includes teacher presentations, discussions and group reflections, both on-campus and o......Problem- and Project-Based Learning (PBL) is a widely used pedagogical method in higher education. Although PBL encourages self-directed learning and works with the students’ own projects and problems, it also includes teacher presentations, discussions and group reflections, both on......-campus and online. Therefore, the teacher’s plans might be relevant to the students’ projects, but that is not always the case. This study investigates how master’s students interact with an online Problem-Based Learning design and examines how technology influences these interactions. This study describes...... an experience and provides a point of departure for further discussion, but it is not an example of best practices for online PBL....

The development of the Problematic Online Gaming Questionnaire (POGQ).

Science.gov (United States)

Demetrovics, Zsolt; Urbán, Róbert; Nagygyörgy, Katalin; Farkas, Judit; Griffiths, Mark D; Pápay, Orsolya; Kökönyei, Gyöngyi; Felvinczi, Katalin; Oláh, Attila

2012-01-01

Online gaming has become increasingly popular. However, this has led to concerns that these games might induce serious problems and/or lead to dependence for a minority of players. The aim of this study was to uncover and operationalize the components of problematic online gaming. A total of 3415 gamers (90% males; mean age 21 years), were recruited through online gaming websites. A combined method of exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) was applied. Latent profile analysis was applied to identify persons at-risk. EFA revealed a six-factor structure in the background of problematic online gaming that was also confirmed by a CFA. For the assessment of the identified six dimensions--preoccupation, overuse, immersion, social isolation, interpersonal conflicts, and withdrawal--the 18-item Problematic Online Gaming Questionnaire (POGQ) proved to be exceedingly suitable. Based on the latent profile analysis, 3.4% of the gamer population was considered to be at high risk, while another 15.2% was moderately problematic. The POGQ seems to be an adequate measurement tool for the differentiated assessment of gaming related problems on six subscales.

Comparison of On-Line Maintenance Support Tools

International Nuclear Information System (INIS)

Simic, Z.; Follen, S. M.; Mikulicic, V.

1998-01-01

Modeling approach to on-line risk monitoring is today in a rapid developing phase. For that reason number of different solutions are available. This paper will attempt to present existing approaches to address on-line risk modeling problem Starting with description of on-line risk monitoring issues in general, then following by presentation of existing software tools (EPRI's Safety Monitor, Equipment Out of Service Monitor, and ORAM-SENTINEL) the current state of the art in this area will be demonstrated. Finally, conclusions and ideas will be outlined. (author)

The attitudes, feelings and experiences of online gamers: a qualitative analysis

OpenAIRE

Hussain, Z; Griffiths, MD

2009-01-01

The playing of massively multiplayer online role-playing games (MMORPGs) is now a highly popular leisure activity. The present study set out to explore the attitudes, experiences, and feelings of online gamers. The study entailed 71 interviews with online gamers (52 males, 19 females) from 11 different countries. Six main themes emerged from the analyses of the interview transcripts: (a) online gaming and integration into day-to-day lives; (b) online gaming, excessive play, and problems; (c) ...

Robust online tracking via adaptive samples selection with saliency detection

Science.gov (United States)

Yan, Jia; Chen, Xi; Zhu, QiuPing

2013-12-01

Online tracking has shown to be successful in tracking of previously unknown objects. However, there are two important factors which lead to drift problem of online tracking, the one is how to select the exact labeled samples even when the target locations are inaccurate, and the other is how to handle the confusors which have similar features with the target. In this article, we propose a robust online tracking algorithm with adaptive samples selection based on saliency detection to overcome the drift problem. To deal with the problem of degrading the classifiers using mis-aligned samples, we introduce the saliency detection method to our tracking problem. Saliency maps and the strong classifiers are combined to extract the most correct positive samples. Our approach employs a simple yet saliency detection algorithm based on image spectral residual analysis. Furthermore, instead of using the random patches as the negative samples, we propose a reasonable selection criterion, in which both the saliency confidence and similarity are considered with the benefits that confusors in the surrounding background are incorporated into the classifiers update process before the drift occurs. The tracking task is formulated as a binary classification via online boosting framework. Experiment results in several challenging video sequences demonstrate the accuracy and stability of our tracker.

Academics and Social Networking Sites: Benefits, Problems and Tensions in Professional Engagement with Online Networking

OpenAIRE

Jordan, Katy; Weller, Martin

2018-01-01

The web has had a profound effect on the ways people interact, with online social networks arguably playing an important role in changing or augmenting how we connect with others. However, uptake of online social networking by the academic community varies, and needs to be understood. This paper presents an independent, novel analysis of a large-scale dataset published by Nature Publishing Group detailing the results of a survey about academics use of online social networking services. An ope...

Problem gambling and drinking among Finnish women

Directory of Open Access Journals (Sweden)

Järvinen-Tassopoulos Johanna

2016-02-01

Full Text Available AIM - This qualitative study expands on female problem gambling by examining short online narratives written by Finnish women. Problem gambling is analysed within the familial context in order to discover gendered roles and practices, and in relation to substance use and abuse in women’s lives. DESIGN - Two sets of qualitative data were used in this study. The first set was collected from two online discussion forums, and the second set was extracted from an online counselling service data in 2008. Chosen messages formed short narratives of women’s problem gambling trajectory (51 cases. The data were analysed in accordance with the content analysis method. RESULTS - Women had started gambling either in adolescence or in adulthood. Most of the women played on slot machines or gambled online. The lack of coping skills, stressful events in life and troubled relationships made the women more vulnerable to gambling harms and other addictions. In some couples, partners were either drinking or gambling. This made the women’s lives even more complicated, because they could not count on their partners’ help and support. The women tried to hide the consequences of their problem gambling for fear of losing their significant others. CONCLUSIONS - Female gambling and female problem gambling are complex concepts influenced by social, cultural and political factors. This study has shown in its limited framework that female problem gambling is related to the gambling environment, the social acceptance of gambling and the regulation of gambling operations within the place of jurisdiction.

Processes and Roles In Remote Online Education

DEFF Research Database (Denmark)

Borch, Ole M.; Madsen, Per Printz; Helbo, Jan

2005-01-01

Problem oriented and project organized study methods are difficult to perform in a virtual remote online educational environment. University faculty, staff and students must play an active role to define, use and manage didactic, pedagogic, technological methods and tools to secure progress....... The results after several years’ experiments are concluded as recommendations to students and institutional staff personal when entering the virtual online educational environment....... and quality in the learning process. Working in project groups in virtual rooms needs a tight management in terms of document handling, distributed task responsibilities, timing, communication, social ‘glue’ etc. To increase learning, course work needs collaboration to discuss professional topics and problem...

The Virtual Shopping Experience: using virtual presence to motivate online shopping

Directory of Open Access Journals (Sweden)

Carolyn Chin

2005-11-01

Full Text Available Online shopping has thus far tended to be a niche business – highly successful in selling digital products such as shares, software and, increasingly, music and films, it has been less successful in persuading the purchasers of ‘traditional’ goods such as cars, clothes, toiletries, or household appliances to forsake their physical retailers and move into cyberspace. In this wide-ranging review paper we investigate the issue of the virtual experience – endeavouring to understand what is needed for a successful ‘shopping experience’ online and what the possible obstacles or pitfalls along the way might be. We initially introduce the concepts of virtual presence (the sense of ‘being there’ and virtual reality, discussing the possible roles both can play in providing a solution to the problem of effective online shopping. We then consider the Experience Economy, a concept which encapsulates many of the issues related to the problem of online shopping and which suggests ways in which online retailers can enhance the effectiveness of their sites by means of a virtual ‘experience’. Having set the scene for online shopping, we discuss eTailing today in terms of direct product experience and the opportunities which cyber-shopping offers to replicate this process. Finally, we identify some of the possibilities and problems of online shopping today, illustrating the current status of virtual presence in retailing with two micro-cases of success and failure.

Acceptability of Interventions Delivered Online and Through Mobile Phones for People Who Experience Severe Mental Health Problems: A Systematic Review.

Science.gov (United States)

Berry, Natalie; Lobban, Fiona; Emsley, Richard; Bucci, Sandra

2016-05-31

Psychological interventions are recommended for people with severe mental health problems (SMI). However, barriers exist in the provision of these services and access is limited. Therefore, researchers are beginning to develop and deliver interventions online and via mobile phones. Previous research has indicated that interventions delivered in this format are acceptable for people with SMI. However, a comprehensive systematic review is needed to investigate the acceptability of online and mobile phone-delivered interventions for SMI in depth. This systematic review aimed to 1) identify the hypothetical acceptability (acceptability prior to or without the delivery of an intervention) and actual acceptability (acceptability where an intervention was delivered) of online and mobile phone-delivered interventions for SMI, 2) investigate the impact of factors such as demographic and clinical characteristics on acceptability, and 3) identify common participant views in qualitative studies that pinpoint factors influencing acceptability. We conducted a systematic search of the databases PubMed, Embase, PsycINFO, CINAHL, and Web of Science in April 2015, which yielded a total of 8017 search results, with 49 studies meeting the full inclusion criteria. Studies were included if they measured acceptability through participant views, module completion rates, or intervention use. Studies delivering interventions were included if the delivery method was online or via mobile phones. The hypothetical acceptability of online and mobile phone-delivered interventions for SMI was relatively low, while actual acceptability tended to be high. Hypothetical acceptability was higher for interventions delivered via text messages than by emails. The majority of studies that assessed the impact of demographic characteristics on acceptability reported no significant relationships between the two. Additionally, actual acceptability was higher when participants were provided remote online

The Online Catalog: Exceeding Our Grasp.

Science.gov (United States)

Lipow, Anne Grodzins

1989-01-01

Discusses two problems related to the use of online catalogs: (1) staff training has not kept pace with new catalogs, resulting in a lack of search expertise in staff and patrons; and (2) users expect instant access to materials found in the catalog. It is argued that these problems must be addressed to adequately serve library patrons. (CLB)

Comparative study on current trading system and online trading: the ...

African Journals Online (AJOL)

Comparative study on current trading system and online trading: the case of ... of online trading and factors affecting its feasibility of implementation in ECX. ... The study found that there is significant capacity problem with major skills gap with ...

On-Line Algorithms and Reverse Mathematics

Science.gov (United States)

Harris, Seth

In this thesis, we classify the reverse-mathematical strength of sequential problems. If we are given a problem P of the form ∀X(alpha(X) → ∃Zbeta(X,Z)) then the corresponding sequential problem, SeqP, asserts the existence of infinitely many solutions to P: ∀X(∀nalpha(Xn) → ∃Z∀nbeta(X n,Zn)). P is typically provable in RCA0 if all objects involved are finite. SeqP, however, is only guaranteed to be provable in ACA0. In this thesis we exactly characterize which sequential problems are equivalent to RCA0, WKL0, or ACA0.. We say that a problem P is solvable by an on-line algorithm if P can be solved according to a two-player game, played by Alice and Bob, in which Bob has a winning strategy. Bob wins the game if Alice's sequence of plays 〈a0, ..., ak〉 and Bob's sequence of responses 〈 b0, ..., bk〉 constitute a solution to P. Formally, an on-line algorithm A is a function that inputs an admissible sequence of plays 〈a 0, b0, ..., aj〉 and outputs a new play bj for Bob. (This differs from the typical definition of "algorithm", though quite often a concrete set of instructions can be easily deduced from A.). We show that SeqP is provable in RCA0 precisely when P is solvable by an on-line algorithm. Schmerl proved this result specifically for the graph coloring problem; we generalize Schmerl's result to any problem that is on-line solvable. To prove our separation, we introduce a principle called Predictk(r) that is equivalent to -WKL0 for standard k, r.. We show that WKL0 is sufficient to prove SeqP precisely when P has a solvable closed kernel. This means that a solution exists, and each initial segment of this solution is a solution to the corresponding initial segment of the problem. (Certain bounding conditions are necessary as well.) If no such solution exists, then SeqP is equivalent to ACA0 over RCA 0 + ISigma02; RCA0 alone suffices if only sequences of standard length are considered. We use different techniques from Schmerl to prove

Plagiarism Due to Misunderstanding: Online Instructor Perceptions

Science.gov (United States)

Greenberger, Scott; Holbeck, Rick; Steele, John; Dyer, Thomas

2016-01-01

Plagiarism is an ongoing problem in higher education. This problem exists in both online and face-to-face modalities. The literature indicates that there are three ways higher education institutions define plagiarism, which includes theft, deception, and misunderstanding. Plagiarism due to misunderstanding has received less attention in the…

Online-based interventions for sexual health among individuals with cancer: a systematic review.

Science.gov (United States)

Kang, Hee Sun; Kim, Hyun-Kyung; Park, Seong Man; Kim, Jung-Hee

2018-03-07

Online interventions have the advantages of being widely available, accessible, comfortable, cost effective, and they can provide tailored information and support. Despite these benefits, the effects of specifically devised online intervention programs for cancer patients' sexual problems are somewhat unclear. The aim of this review is to describe online-based interventions and to assess their effects on sexual health among cancer survivors and/or their partners. We investigated the effects of online sexual interventions among individuals with cancer or their partners. Among these, we considered 4 eligible articles. Despite the diversity of contents of the interventions, the identified modes of delivery among most of the interventions were as follows: education, interactive methods, cognitive behavior therapy, tailored information, and self-monitoring. Methods of monitoring the interventions, including the utilization of the web site and post-treatment program rating, were reported. All the online intervention programs incorporated a focus on physical, psychological, cognitive, and social aspects of sexual health. Significant effects on patient sexual function and interest and the psychological aspect of sexual problems were reported. This study provides evidence that online-based interventions would be effective in improving the psycho-sexual problems of cancer survivors and their partners.

Exploring Game Experiences and Game Leadership in Massively Multiplayer Online Role-Playing Games

Science.gov (United States)

Jang, YeiBeech; Ryu, SeoungHo

2011-01-01

This study explored the in-game experiences of massively multiplayer online role-playing game (MMORPG) players focusing on game leadership and offline leadership. MMORPGs have enormous potential to provide gameplayers with rich social experiences through various interactions along with social activities such as joining a game community, team play…

A study of some neutron-rich isotopes of lanthanum, cerium and praseodymium by means of fast chemical on-line separation technique SISAK

International Nuclear Information System (INIS)

Skarnemark, G.

1977-01-01

The fast on-line chemical separation technique SISAK has been utilized to study the decay properties of neutron-rich isotopes of La, Ce and Pr. The results include partial decay schemes and γ-ray intensity data for 14 min 143 La, 42 s 144 La, 25 s 145 La, 9 s 146 La, 3 min 145 Ce, 14 min 146 Ce, 56 s 147 Ce, 50 s 148 Ce, 12 min 147 Pr, 2 min 148 Pr, 3 min 149 Pr and 6 s 150 Pr. Half-lives and γ-ray energies are reported for the previously unknown nuclides 147 La (Tsub(1/2) = 2.2 s), 148 La (Tsub(1/2) approximately 1 s), 149 Ce (Tsub(1/2) = 5.7 s) and 150 Ce (Tsub(1/2) = 4.1 s). The nuclides were formed in thermal neutron-induced fission of 235 U. The fission products were transferred to the SISAK system via a gas jet recoil transportation (GJRT) system. The combination of the GJRT system with SISAK is discussed, as well as the chemical separation systems used for the isolation of La, Ce and Pr. The appendices I - IX contain previously published material which is included in the thesis. (Auth.)

The development of the Problematic Online Gaming Questionnaire (POGQ.

Directory of Open Access Journals (Sweden)

Zsolt Demetrovics

Full Text Available BACKGROUND: Online gaming has become increasingly popular. However, this has led to concerns that these games might induce serious problems and/or lead to dependence for a minority of players. AIM: The aim of this study was to uncover and operationalize the components of problematic online gaming. METHODS: A total of 3415 gamers (90% males; mean age 21 years, were recruited through online gaming websites. A combined method of exploratory factor analysis (EFA and confirmatory factor analysis (CFA was applied. Latent profile analysis was applied to identify persons at-risk. RESULTS: EFA revealed a six-factor structure in the background of problematic online gaming that was also confirmed by a CFA. For the assessment of the identified six dimensions--preoccupation, overuse, immersion, social isolation, interpersonal conflicts, and withdrawal--the 18-item Problematic Online Gaming Questionnaire (POGQ proved to be exceedingly suitable. Based on the latent profile analysis, 3.4% of the gamer population was considered to be at high risk, while another 15.2% was moderately problematic. CONCLUSIONS: The POGQ seems to be an adequate measurement tool for the differentiated assessment of gaming related problems on six subscales.

Online Least Squares One-Class Support Vector Machines-Based Abnormal Visual Event Detection

Directory of Open Access Journals (Sweden)

Tian Wang

2013-12-01

Full Text Available The abnormal event detection problem is an important subject in real-time video surveillance. In this paper, we propose a novel online one-class classification algorithm, online least squares one-class support vector machine (online LS-OC-SVM, combined with its sparsified version (sparse online LS-OC-SVM. LS-OC-SVM extracts a hyperplane as an optimal description of training objects in a regularized least squares sense. The online LS-OC-SVM learns a training set with a limited number of samples to provide a basic normal model, then updates the model through remaining data. In the sparse online scheme, the model complexity is controlled by the coherence criterion. The online LS-OC-SVM is adopted to handle the abnormal event detection problem. Each frame of the video is characterized by the covariance matrix descriptor encoding the moving information, then is classified into a normal or an abnormal frame. Experiments are conducted, on a two-dimensional synthetic distribution dataset and a benchmark video surveillance dataset, to demonstrate the promising results of the proposed online LS-OC-SVM method.

Moving beyond Bricks and Mortar: Changing the Conversation on Online Education

Science.gov (United States)

Miller, Teresa; Ribble, Michael

2010-01-01

Online learning has changed education in many ways. This change was not mandated, but instead filled a need expressed by students. A problem with this shift toward online teaching is that it has happened randomly and irregularly within K-12 systems. Demands from students for online learning at both K-12 and higher education levels have not always…

Secretary Problems: Weights and Discounts

NARCIS (Netherlands)

M. Babaioff; M. Dinitz; A. Gupta; N.S. Immorlica (Nicole Simone); K. Talwar

2009-01-01

textabstractThe classical secretary problem studies the problem of selecting online an element (a “secretary”) with maximum value in a randomly ordered sequence. The difficulty lies in the fact that an element must be either selected or discarded upon its arrival, and this decision is irrevocable.

Discrete Opinion Dynamics on Online Social Networks

International Nuclear Information System (INIS)

Hu Yan-Li; Bai Liang; Zhang Wei-Ming

2013-01-01

This paper focuses on the dynamics of binary opinions {+1, −1} on online social networks consisting of heterogeneous actors. In our model, actors update their opinions under the interplay of social influence and self- affirmation, which leads to rich dynamical behaviors on online social networks. We find that the opinion leading to the consensus features an advantage of the initially weighted fraction based on actors' strength over the other, instead of the population. For the role of specific actors, the consensus converges towards the opinion that a small fraction of high-strength actors hold, and individual diversity of self-affirmation slows down the ordering process of consensus. These indicate that high-strength actors play an essential role in opinion formation with strong social influence as well as high persistence. Further investigations show that the initial fraction of high-strength actors to dominate the evolution depends on the heterogeneity of the strength distribution, and less high-strength actors are needed in the case of a smaller exponent of power-law distribution of actors' strength. Our study provides deep insights into the role of social influence and self-affirmation on opinion formation on online social networks. (general)

Discrete Opinion Dynamics on Online Social Networks

Science.gov (United States)

Hu, Yan-Li; Bai, Liang; Zhang, Wei-Ming

2013-01-01

This paper focuses on the dynamics of binary opinions {+1, -1} on online social networks consisting of heterogeneous actors. In our model, actors update their opinions under the interplay of social influence and self- affirmation, which leads to rich dynamical behaviors on online social networks. We find that the opinion leading to the consensus features an advantage of the initially weighted fraction based on actors' strength over the other, instead of the population. For the role of specific actors, the consensus converges towards the opinion that a small fraction of high-strength actors hold, and individual diversity of self-affirmation slows down the ordering process of consensus. These indicate that high-strength actors play an essential role in opinion formation with strong social influence as well as high persistence. Further investigations show that the initial fraction of high-strength actors to dominate the evolution depends on the heterogeneity of the strength distribution, and less high-strength actors are needed in the case of a smaller exponent of power-law distribution of actors' strength. Our study provides deep insights into the role of social influence and self-affirmation on opinion formation on online social networks.

A Bit too Skinny for Me: Women's Homosocial Constructions of Heterosexual Desire in Online Dating

DEFF Research Database (Denmark)

Mortensen, Kristine Køhler

2018-01-01

, online dating practices are rich fields for investigating the workings of desire. Based on audiovisual recordings of two Danish female friends engaging in online dating activities, this article demonstrates how participants, through joint stance-taking, co-construct shared desire and adjust individually......-produced desire to create homosocial affiliation. Hence, in this case, heterosexual desire construction is a collaborative undertaking generated through homosocial bonding. The performed desire carries a strong physical focus, partly produced by the participants’ attention to bodily detail and partly through...

Updates on Software development for a RICH detector

Science.gov (United States)

Voloshin, Andrew; Benmokhtar, Fatiha; Lendacky, Andrew; Goodwill, Justin

2017-01-01

The CLAS12 detector at Thomas Jefferson National Accelerator Facility (TJNAF) is undergoing an upgrade. One of the improvements is the addition of a Ring Imaging Cherenkov (RICH) detector to improve particle identification in the 3-8 GeV/c momentum range. Approximately 400 multi anode photomultiplier tubes (MAPMTs) are going to be used to detect Cherenkov Radiation in the single photoelectron spectra (SPS). Software development for slow control as well as online monitoring is under development. I will be presenting my work on the development of a java based programs for a monitor and explain its interaction with a Mysql database where the MAPMTs information is stored as well as the techniques used to visualize Cherenkov rings.

Taiwanese EFL Learners’ Perceived Use of Online Reading Strategies

Directory of Open Access Journals (Sweden)

Lisa Wen Chun Chen

2015-09-01

Full Text Available Reading strategies are beneficial to learners’ reading comprehension. The strategies can be divided into different categories, such as global reading strategies, problem solving strategies and support strategies. Most previous studies investigated the importance of reading strategies in the paper-based reading. However, relatively few studies examined online reading strategies and their effects on reading comprehension. Online reading materials are important sources for EFL students since an increasing number of learners read texts and learn through the Internet. EFL learners in Taiwan, unfortunately, are reported to be overwhelmed with English online materials on the Internet. Therefore, this study intends to examine EFL learners’ perceived use of online reading strategies and whether their perceived strategy uses are different in terms of proficiency levels and gender. There are 94 Taiwanese EFL learners (43% of them are males, n=40 and 57 % of them are females, n=54, who received the Online Survey of Reading Strategies (OSORS adapted from Anderson (2003 in the study. The result showed that EFL online readers tend to use more global strategies, such as using contextual clues and observing tables, figures, and pictures in the on-line text to increase understanding. High level learners used more global and problem solving strategies than low level learners, which corresponds to previous studies. Additionally, there is no difference of strategy use between males and females. Several pedagogical implications, such as the need to raise students’ awareness of strategy use, are addressed in the present study.

Online learning: the brave new world of massive open online courses and the role of the health librarian.

Science.gov (United States)

Spring, Hannah

2016-03-01

In a wired, virtual and information rich society, MOOCs (Massive Open Online Courses) are leading us into a brave new world in which their key role is to support lifelong networked learning. This feature looks at the broad role of MOOCs and considers them within the context of health, and health librarianship. In particular, it provides examples of where health librarians have developed MOOCs and what opportunities there are in the future for health librarians to collaborate in the development and delivery of health MOOCs. H.S. © 2016 Health Libraries Group.

Consumer behavior toward online purchasing behavior : “What factors trigger the online purchasing decision of young Swedish consumer?”

OpenAIRE

Thienmongkol, Kaorat; Thaisuntad, Pongsatorn

2009-01-01

Program: MIMA student – International Marketing Course name: Master Thesis (EFO705) Title: Consumer behavior toward online purchasing behavior Authors: Kaorat ThienmongkolPongsatorn Thaisuntad Supervisor: Daniel Tolstoy Problem: “What factors trigger the online purchasing decision of young SwedishConsumer?” Purpose: The purpose of this report is to study the insights about the factors that triggerpurchasing behavior of young Swedish consumer to shopping on the internet.The result will enable ...

Melt inclusion: methods, applications and problem: Silica-rich melts in quartz xenoliths from Vulcano islands and their bearing on processes of crustal melting and crust-magma interaction in the Aeolian Arc, Italy

NARCIS (Netherlands)

Frezzotti, M.L.; Zavon, V.; Peccerillo, A.; Nikogosian, I.

2002-01-01

Silica-rich melts in quartz xenoliths from Vulcano islands and their bearing on processes of crustal melting and crust-magma interaction in the Aeolian Arc, Italy Proceedings of workshop Melt inclusion: methods, applications and problem. Napoli, Italy, September 2002, p. 71-73

PEER-FEEDBACK AND ONLINE INTERACTION: A CASE STUDY

Directory of Open Access Journals (Sweden)

Martha Isabel Espitia

2013-08-01

Full Text Available The implementation of information and communication technologies (ICTs in the English as a Foreign Language (EFL classroom has led to different practices and types of interaction. Online interaction allows teachers and students to use the target language beyond the classroom and provides students with more time to be exposed to and use the language. This case study aimed at understanding how a group of twelve students at Universidad de la Sabana, who participated in online forums as part of the requirements of a blended EFL course, interacted online to provide peer-feedback on written compositions. It also analyzed how online interaction was undertaken when using online forums. Findings suggest that participants raised awareness about the relevance of editing to avoid possible language problems by reviewing their peers' products and that the implementation of online peer feedback as an assessment strategy reveals students' beliefs towards language assessment.

Research on Model of Student Engagement in Online Learning

Science.gov (United States)

Peng, Wang

2017-01-01

In this study, online learning refers students under the guidance of teachers through the online learning platform for organized learning. Based on the analysis of related research results, considering the existing problems, the main contents of this paper include the following aspects: (1) Analyze and study the current student engagement model.…

Monte Carlo aided treatments of the nonlinear inverse PGNAA measurement problem for various continuous on-line applications

International Nuclear Information System (INIS)

Gardner, R.P.; Guo, P.; Sood, A.; Mayo, C.W.; Dobbs, C.L.

1998-01-01

A review of our work on the application of the PGNAA method as applied to five industrial applications is given. Some introductory material is first given on the importance and use of Monte Carlo simulation in this area, some comments on the place of PGNAA in elemental analysis, and a brief description of the Monte Carlo - Library Least-Squares (MCLLS) approach to the nonlinear inverse PGNAA analysis problem. Then the applications of PGNAA are discussed for: (1) on-line bulk coal analysis, (2) nuclear oil well logging, (3) vitrified waste, (4) the analysis of sodium and aluminium in 'green liquor' in the presence of chlorine, and (5) the conveyor belt sorting of aluminum alloy samples. It is concluded that PGNAA is a rapidly emerging important new technology and measurement approach. (author)

Secretary Problems: Weights and Discounts

OpenAIRE

Babaioff, M.; Dinitz, M.; Gupta, A.; Immorlica, Nicole Simone; Talwar, K.

2009-01-01

textabstractThe classical secretary problem studies the problem of selecting online an element (a “secretary”) with maximum value in a randomly ordered sequence. The difficulty lies in the fact that an element must be either selected or discarded upon its arrival, and this decision is irrevocable. Constant-competitive algorithms are known for the classical secretary problems and several variants. We study the following two extensions of the secretary problem: In the discounted secretary probl...

On-Line Path Generation and Tracking for High-Speed Wheeled Autonomous Vehicles

Science.gov (United States)

2006-02-17

On-Line Path Generation and Tracking for High-Speed Wheeled Autonomous Vehicles Report Title ABSTRACT In this work we proposed two semi-analytic...298-102 Enclosure 1 On-Line Path Generation and Tracking for High-Speed Wheeled Autonomous Vehicles by...Specifically, the following problems will be addressed during this project: 2.1 Challenges The problem of trajectory planning for high-speed autonomous vehicles is

Silent game as Model for Examining Student Online Creativity - Preliminary Results from an Experiment

DEFF Research Database (Denmark)

Sørensen, Jannick Kirk

2016-01-01

The ERASMUS+ project “OnCreate” aims at improving online mediated creative collaboration among students. But what are the differences between collaboration online and in a face-to-face setting in terms of creative processes? Theories on media richness and collaborative creativity can provide...... the creative dialogues developed through a very constrained communicative environment. The participants could only communicate their creative ideas by placing standard LEGO bricks on a plate. No talking or any other communication was allowed. The game used in the experiment is an adoption of the so...

Advice Complexity of the Online Induced Subgraph Problem

DEFF Research Database (Denmark)

Komm, Dennis; Královič, Rastislav; Královič, Richard

2016-01-01

of the input can influence the solution quality. We evaluate the information in a quantitative way by considering the best possible advice of given size that describes the unknown input. Using a result from Boyar et al. we give a tight trade-off relationship stating that, for inputs of length n, roughly n...... subgraph problem, preemption does not significantly help by giving a lower bound of Omega(n/(c^2\\log c)) on the bits of advice that are needed to obtain competitive ratio c, where c is any increasing function bounded from above by \\sqrt{n/\\log n}. We also give a linear lower bound for c close to 1....... these problems by investigating a generalized problem: for an arbitrary but fixed hereditary property, find some maximal induced subgraph having the property. We investigate this problem from the point of view of advice complexity, i.e. we ask how some additional information about the yet unrevealed parts...

CliniSpace: a multiperson 3D online immersive training environment accessible through a browser.

Science.gov (United States)

Dev, Parvati; Heinrichs, W LeRoy; Youngblood, Patricia

2011-01-01

Immersive online medical environments, with dynamic virtual patients, have been shown to be effective for scenario-based learning (1). However, ease of use and ease of access have been barriers to their use. We used feedback from prior evaluation of these projects to design and develop CliniSpace. To improve usability, we retained the richness of prior virtual environments but modified the user interface. To improve access, we used a Software-as-a-Service (SaaS) approach to present a richly immersive 3D environment within a web browser.

DEVELOPING ONLINE READING SUPPLEMENTARYMATERIALSFOR THE TENTH GRADERS OF SMAN 3 PROBOLINGGO

Directory of Open Access Journals (Sweden)

Reny Windi Astuti

2017-04-01

Full Text Available Reading is very important in learning a foreign language. Reading is also the interaction between reader and text. As the hardest skill for foreign language learners, reading requires rich background and knowledge of the language. Curriculum 2013 strongly suggeststhe teachers and students use textbook which government has developed. The researchers findthat English for the tenth graders does not have adequate reading materials. Based on the need analysis done by the researcher, the teacher has to add some other materials outside of the book to accommodate students in learning reading. Therefore, there should be adequate reading materials for English language learners. The purpose of this research was to develop online reading supplementary material based on curriculum 2013 that could be useful for English teachers. This study was carried toR&D (Research and Development. This paper presented; (1 supplementary materials which could be used by the students through online based, and (2 how to develop online reading supplementary materials. By considering these theories, it is hoped that the teachers and scholars can have theoretical insight in developing online reading supplementary materials.

Preferences for Internet-Based Mental Health Interventions in an Adult Online Sample: Findings From an Online Community Survey.

Science.gov (United States)

Batterham, Philip J; Calear, Alison L

2017-06-30

Despite extensive evidence that Internet interventions are effective in treating mental health problems, uptake of Internet programs is suboptimal. It may be possible to make Internet interventions more accessible and acceptable through better understanding of community preferences for delivery of online programs. This study aimed to assess community preferences for components, duration, frequency, modality, and setting of Internet interventions for mental health problems. A community-based online sample of 438 Australian adults was recruited using social media advertising and administered an online survey on preferences for delivery of Internet interventions, along with scales assessing potential correlates of these preferences. Participants reported a preference for briefer sessions, although they recognized a trade-off between duration and frequency of delivery. No clear preference for the modality of delivery emerged, although a clear majority preferred tailored programs. Participants preferred to access programs through a computer rather than a mobile device. Although most participants reported that they would seek help for a mental health problem, more participants had a preference for face-to-face sources only than online programs only. Younger, female, and more educated participants were significantly more likely to prefer Internet delivery. Adults in the community have a preference for Internet interventions with short modules that are tailored to individual needs. Individuals who are reluctant to seek face-to-face help may also avoid Internet interventions, suggesting that better implementation of existing Internet programs requires increasing acceptance of Internet interventions and identifying specific subgroups who may be resistant to seeking help. ©Philip J Batterham, Alison L Calear. Originally published in JMIR Mental Health (http://mental.jmir.org), 30.06.2017.

Preventing Online Victimization: College Students' Views on Intervention and Prevention.

Science.gov (United States)

White, Wendi E; Carmody, Dianne

2016-01-14

Facebook, Twitter, and other social networking sites have changed the way we interact online. Technological advances have also facilitated the emergence of cyberstalking and online harassment, a growing issue on college campuses. This study utilizes focus group data to examine college students' experiences with online harassment and cyberstalking. Students voiced concerns with online tracking, falsifying identities, and harassment. They also noted that incoming first-year students and those negotiating some of their first romantic relationships are especially vulnerable. In addition, students were asked to propose appropriate prevention, education, and intervention strategies at the college level. Surprisingly, many students recommended offline programs to battle this online problem. © The Author(s) 2016.

Appropriate Targets for Search Advertising as Part of Online Gatekeeping for Suicide Prevention.

Science.gov (United States)

Sueki, Hajime; Ito, Jiro

2018-05-01

Gatekeeper training is an effective suicide prevention strategy. However, the appropriate targets of online gatekeeping have not yet been clarified. We examined the association between the outcomes of online gatekeeping using the Internet and the characteristics of consultation service users. An advertisement to encourage the use of e-mail-based psychological consultation services among viewers was placed on web pages that showed the results of searches using suicide-related keywords. All e-mails received between October 2014 and December 2015 were replied to as part of gatekeeping, and the obtained data (responses to an online questionnaire and the content of the received e-mails) were analyzed. A total of 154 consultation service users were analyzed, 35.7% of whom were male. The median age range was 20-29 years. Online gatekeeping was significantly more likely to be successful when such users faced financial/daily life or workplace problems, or revealed their names (including online names). By contrast, the activity was more likely to be unsuccessful when it was impossible to assess the problems faced by consultation service users. It may be possible to increase the success rate of online gatekeeping by targeting individuals facing financial/daily life or workplace problems with marked tendencies for self-disclosure.

Online Discourse: An Analysis of Multiple Problem-Solving Episodes over Time

Science.gov (United States)

Richard, Lynne F.

2012-01-01

Computer technology is used as a mediational tool to support collaborative instructional methods. Computer support offers a platform for collaboration with the goal of scaffolding students' understanding, providing increased agency to the student for their own learning, and motivating students, as participants in a PBL process. In online PBL,…

An Approach to Scoring Collaboration in Online Game Environments

Science.gov (United States)

Scoular, Claire; Care, Esther; Awwal, Nafisa

2017-01-01

With technological advances, it is now possible to use games to capture information-rich behaviours that reveal processes by which players interact and solve problems. Recent problem-based games have been designed to assess and record detailed interactions between the problem solver and the game environment, and thereby capture salient solution…

Computer Vision Syndrome for Non-Native Speaking Students: What Are the Problems with Online Reading?

Science.gov (United States)

Tseng, Min-chen

2014-01-01

This study investigated the online reading performances and the level of visual fatigue from the perspectives of non-native speaking students (NNSs). Reading on a computer screen is more visually more demanding than reading printed text. Online reading requires frequent saccadic eye movements and imposes continuous focusing and alignment demand.…

The 3D LAOKOON--Visual and Verbal in 3D Online Learning Environments.

Science.gov (United States)

Liestol, Gunnar

This paper reports on a project where three-dimensional (3D) online gaming environments were exploited for the purpose of academic communication and learning. 3D gaming environments are media and meaning rich and can provide inexpensive solutions for educational purposes. The experiment with teaching and discussions in this setting, however,…

A solution to the online guidance problem for targeted reaches: proportional rate control using relative disparity tau.

Science.gov (United States)

Anderson, Joe; Bingham, Geoffrey P

2010-09-01

We provide a solution to a major problem in visually guided reaching. Research has shown that binocular vision plays an important role in the online visual guidance of reaching, but the visual information and strategy used to guide a reach remains unknown. We propose a new theory of visual guidance of reaching including a new information variable, tau(alpha) (relative disparity tau), and a novel control strategy that allows actors to guide their reach trajectories visually by maintaining a constant proportion between tau(alpha) and its rate of change. The dynamical model couples the information to the reaching movement to generate trajectories characteristic of human reaching. We tested the theory in two experiments in which participants reached under conditions of darkness to guide a visible point either on a sliding apparatus or on their finger to a point-light target in depth. Slider apparatus controlled for a simple mapping from visual to proprioceptive space. When reaching with their finger, participants were forced, by perturbation of visual information used for feedforward control, to use online control with only binocular disparity-based information for guidance. Statistical analyses of trajectories strongly supported the theory. Simulations of the model were compared statistically to actual reaching trajectories. The results supported the theory, showing that tau(alpha) provides a source of information for the control of visually guided reaching and that participants use this information in a proportional rate control strategy.

An e-Learning Collaborative Filtering Approach to Suggest Problems to Solve in Programming Online Judges

Science.gov (United States)

Toledo, Raciel Yera; Mota, Yailé Caballero

2014-01-01

The paper proposes a recommender system approach to cover online judge's domains. Online judges are e-learning tools that support the automatic evaluation of programming tasks done by individual users, and for this reason they are usually used for training students in programming contest and for supporting basic programming teachings. The…

Optimizing online social networks for information propagation.

Directory of Open Access Journals (Sweden)

Duan-Bing Chen

Full Text Available Online users nowadays are facing serious information overload problem. In recent years, recommender systems have been widely studied to help people find relevant information. Adaptive social recommendation is one of these systems in which the connections in the online social networks are optimized for the information propagation so that users can receive interesting news or stories from their leaders. Validation of such adaptive social recommendation methods in the literature assumes uniform distribution of users' activity frequency. In this paper, our empirical analysis shows that the distribution of online users' activity is actually heterogenous. Accordingly, we propose a more realistic multi-agent model in which users' activity frequency are drawn from a power-law distribution. We find that previous social recommendation methods lead to serious delay of information propagation since many users are connected to inactive leaders. To solve this problem, we design a new similarity measure which takes into account users' activity frequencies. With this similarity measure, the average delay is significantly shortened and the recommendation accuracy is largely improved.

Optimizing online social networks for information propagation.

Science.gov (United States)

Chen, Duan-Bing; Wang, Guan-Nan; Zeng, An; Fu, Yan; Zhang, Yi-Cheng

2014-01-01

Online users nowadays are facing serious information overload problem. In recent years, recommender systems have been widely studied to help people find relevant information. Adaptive social recommendation is one of these systems in which the connections in the online social networks are optimized for the information propagation so that users can receive interesting news or stories from their leaders. Validation of such adaptive social recommendation methods in the literature assumes uniform distribution of users' activity frequency. In this paper, our empirical analysis shows that the distribution of online users' activity is actually heterogenous. Accordingly, we propose a more realistic multi-agent model in which users' activity frequency are drawn from a power-law distribution. We find that previous social recommendation methods lead to serious delay of information propagation since many users are connected to inactive leaders. To solve this problem, we design a new similarity measure which takes into account users' activity frequencies. With this similarity measure, the average delay is significantly shortened and the recommendation accuracy is largely improved.

A bit too skinny for me: women’s homosocial constructions of heterosexual desire in online dating

DEFF Research Database (Denmark)

Mortensen, Kristine Køhler

2015-01-01

relations. Thus, online dating practices are rich fields for investigating the workings of desire. Based on audiovisual recordings of two Danish female friends engaging in online dating activities, this article demonstrates how participants, through joint stance-taking, co-construct shared desire and adjust...... individually-produced desire to create homosocial affiliation. Hence, in this case,heterosexual desire construction is a collaborative undertaking generated through homosocial bonding. The performed desire carries a strong physical focus, partly produced by the participants' attention to bodily detail...

Subject Access Problems of Different Types of OPAC Users Or, the Double Challenge.

Science.gov (United States)

Cochrane, Pauline A.

1989-01-01

Reviews the problems of users of online public access catalogs and argues that it is necessary to think of all searching problems as systems problems rather than user failures, and to concentrate research in the area of systems enhancements. A list of improved tools needed for subject searching in online catalogs is identified. (CLB)

One Method for Inhibiting the Copying of Online Homework

Science.gov (United States)

Busch, Hauke

2017-01-01

Over the last several years online homework solutions have become ever more accessible to students. This is due in part to programs like Yahoo Answers, Chegg, publisher solution manuals, and other web resources that are readily available online. The student can easily search any physics homework problem posted on the web in a matter of seconds and…

On-line control systems in power plants

International Nuclear Information System (INIS)

Freymeyer, P.

1981-01-01

This report is a review of on-line control systems as a complex system connected with all problems like, development, planning, degree of automation, economics, service, quality and documentation. (orig.) [de

Academics and Social Networking Sites: Benefits, Problems and Tensions in Professional Engagement with Online Networking

Science.gov (United States)

Jordan, Katy; Weller, Martin

2018-01-01

The web has had a profound effect on the ways people interact, with online social networks arguably playing an important role in changing or augmenting how we connect with others. However, uptake of online social networking by the academic community varies, and needs to be understood. This paper presents an independent, novel analysis of a…

Teaching cross-cultural communication skills online: a multi-method evaluation.

Science.gov (United States)

Lee, Amy L; Mader, Emily M; Morley, Christopher P

2015-04-01

Cultural competency education is an important and required part of undergraduate medical education. The objective of this study was to evaluate whether an online cross-cultural communication module could increase student use of cross-cultural communication questions that assess the patient's definition of the problem, the way the problem affects their life, their concerns about the problem, and what the treatment should be (PACT). We used multi-method assessment of students assigned to family medicine clerkship blocks that were randomized to receive online cultural competency and PACT training added to their standard curriculum or to a control group receiving the standard curriculum only. Outcomes included comparison, via analysis of variance, of number of PACT questions used during an observed Standardized Patient Exercise, end-of-year OSCE scores, and qualitative analysis of student narratives. Students (n=119) who participated in the online module (n=60) demonstrated increased use of cross-cultural communication PACT questions compared to the control group (n=59) and generally had positive themes emerge from their reflective writing. The module had the biggest impact on students who later went on to match in high communication specialties. Online teaching of cross-cultural communication skills can be effective at changing medical student behavior.

Testing the Usability of Two Online Research Guides

Directory of Open Access Journals (Sweden)

Luigina Vileno

2011-01-01

Full Text Available This article describes usability testing of two online research guides. One guide was in the area of applied human sciences and the other was geared toward the discipline of psychology. Six undergraduate students were given several tasks to complete by using the guides. The participants also completed two questionnaires. One described the participants’ demographics and how much time they spent on the Internet on a daily basis. On the other questionnaire, filled out after the usability test, the participants rated the online research guides. Overall, the online research guides were found to be difficult to use. By observing how the participants interacted with the online research guides, the author has identified several problem areas that need to be addressed.

A Fresh look at Online Lexicography

DEFF Research Database (Denmark)

Nielsen, Sandro

2011-01-01

that lexicographers should distinguish between the database and the dictionary: The database is not a dictionary, but a repository of structured data. Furthermore, modern online dictionaries do not contain data, but are search engines that search for structured data in databases, retrieve the relevant data...... online dictionaries that allow them to make structured searches relating directly to the problems they need to solve. The search engines have been designed according to lexicographical functions, i.e. the type of help dictionaries can provide in certain types of situation. All dictionaries have both...

Teen online problem solving for teens with traumatic brain injury: Rationale, methods, and preliminary feasibility of a teen only intervention.

Science.gov (United States)

Wade, Shari L; Narad, Megan E; Kingery, Kathleen M; Taylor, H Gerry; Stancin, Terry; Kirkwood, Michael W; Yeates, Keith O

2017-08-01

To describe the Teen Online Problem Solving-Teen Only (TOPS-TO) intervention relative to the original Teen Online Problem Solving-Family (TOPS-F) intervention, to describe a randomized controlled trial to assess intervention efficacy, and to report feasibility and acceptability of the TOPS-TO intervention. Research method and design: This is a multisite randomized controlled trial, including 152 teens (49 TOPS-F, 51 TOPS-TO, 52 IRC) between the ages of 11-18 who were hospitalized for a moderate to severe traumatic brain injury in the previous 18 months. Assessments were completed at baseline, 6-months post baseline, and 12-months post baseline. Data discussed include adherence and satisfaction data collected at the 6-month assessment (treatment completion) for TOPS-F and TOPS-TO. Adherence measures (sessions completed, dropout rates, duration of treatment engagement, and rates of program completion) were similar across treatment groups. Overall, teen and parent reported satisfaction was high and similar across groups. Teens spent a similar amount of time on the TOPS website across groups, and parents in the TOPS-F spent more time on the TOPS website than those in the TOPS-TO group (p = .002). Parents in the TOPS-F group rated the TOPS website as more helpful than those in the TOPS-TO group (p = .05). TOPS-TO intervention is a feasible and acceptable intervention approach. Parents may perceive greater benefit from the family based intervention. Further examination is required to understand the comparative efficacy in improving child and family outcomes, and who is likely to benefit from each approach. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Changes in brain activity in response to problem solving during the abstinence from online game play.

Science.gov (United States)

Kim, Sun Mi; Han, Doug Hyun; Lee, Young Sik; Kim, Jieun E; Renshaw, Perry F

2012-06-01

Several studies have suggested that addictive disorders including substance abuse and pathologic gambling might be associated with dysfunction on working memory and prefrontal activity. We hypothesized that excessive online game playing is associated with deficits in prefrontal cortex function and that recovery from excessive online game playing might improve prefrontal cortical activation in response to working memory stimulation. Thirteen adolescents with excessive online game playing (AEOP) and ten healthy adolescents (HC) agreed to participate in this study. The severity of online game play and playing time were evaluated for a baseline measurement and again following four weeks of treatment. Brain activation in response to working memory tasks (simple and complex calculations) at baseline and subsequent measurements was assessed using BOLD functional magnetic resonance imaging (fMRI). Compared to the HC subjects, the AEOP participants exhibited significantly greater activity in the right middle occipital gyrus, left cerebellum posterior lobe, left premotor cortex and left middle temporal gyrus in response to working memory tasks during baseline measurements. After four weeks of treatment, the AEOP subjects showed increased activity within the right dorsolateral prefrontal cortex and left occipital fusiform gyrus. After four weeks of treatment, changes in the severity of online game playing were negatively correlated with changes in the mean β value of the right dorsolateral prefrontal cortex in response to complex stimulation. We suggest that the effects of online game addiction on working memory may be similar to those observed in patients with substance dependence.

APPLICATION OF FUZZY LOGIC BASED APPAREL SIZE FINDER IN ONLINE MARKETING

Directory of Open Access Journals (Sweden)

DEMIR Murat

2017-05-01

Full Text Available The emergence of online retailing has been one of the most significant developments in business history. Altough proportion of apparel sales in online retailing also has been shown rapid increase, there are some significant barriers to overcome for expanding this market share. It is seen in literature that there are many researchers point out that finding right size apparel is the one of the most significant problems in online retailing. There are many study to solve this problem but still there is not an exact solution yet. Creating 3D avatars for virtual try on or scanning body measurements of consumers have been used to solved this problem but any study has not come up with a reliable solution. In this study, a fuzzy logic based apparel size finder website is proposed. The benefits and working princible of this website are also explained. In this website, both of consumers and retailers can create a profile page for sharing products or following each other. Once consumers follow a profile of retailer, they can see the right size of any shared apparel. On the other hand, retailers can also directly send message to certain users for certain size apparel. This system brings advantages for both parties. Consumers can reach the correct size of apparel and retailers can reach to target customer. It is assumed that creating website alike this or application of existing online retailers will help to reduce return in apparel online retailing as well as it may help to expand online retailing.

Online Exhibits & Concept Maps

Science.gov (United States)

Douma, M.

2009-12-01

Presenting the complexity of geosciences to the public via the Internet poses a number of challenges. For example, utilizing various - and sometimes redundant - Web 2.0 tools can quickly devour limited time. Do you tweet? Do you write press releases? Do you create an exhibit or concept map? The presentation will provide participants with a context for utilizing Web 2.0 tools by briefly highlighting methods of online scientific communication across several dimensions. It will address issues of: * breadth and depth (e.g. from narrow topics to well-rounded views), * presentation methods (e.g. from text to multimedia, from momentary to enduring), * sources and audiences (e.g. for experts or for the public, content developed by producers to that developed by users), * content display (e.g. from linear to non-linear, from instructive to entertaining), * barriers to entry (e.g. from an incumbent advantage to neophyte accessible, from amateur to professional), * cost and reach (e.g. from cheap to expensive), and * impact (e.g. the amount learned, from anonymity to brand awareness). Against this backdrop, the presentation will provide an overview of two methods of online information dissemination, exhibits and concept maps, using the WebExhibits online museum (www.webexhibits.org) and SpicyNodes information visualization tool (www.spicynodes.org) as examples, with tips on how geoscientists can use either to communicate their science. Richly interactive online exhibits can serve to engage a large audience, appeal to visitors with multiple learning styles, prompt exploration and discovery, and present a topic’s breadth and depth. WebExhibits, which was among the first online museums, delivers interactive information, virtual experiments, and hands-on activities to the public. While large, multidisciplinary exhibits on topics like “Color Vision and Art” or “Calendars Through the Ages” require teams of scholars, user interface experts, professional writers and editors

[Population problem, comprehension problem].

Science.gov (United States)

Tallon, F

1993-08-01

Overpopulation of developing countries in general, and Rwanda in particular, is not just their problem but a problem for developed countries as well. Rapid population growth is a key factor in the increase of poverty in sub-Saharan Africa. Population growth outstrips food production. Africa receives more and more foreign food, economic, and family planning aid each year. The Government of Rwanda encourages reduced population growth. Some people criticize it, but this criticism results in mortality and suffering. One must combat this ignorance, but attitudes change slowly. Some of these same people find the government's acceptance of family planning an invasion of their privacy. Others complain that rich countries do not have campaigns to reduce births, so why should Rwanda do so? The rate of schooling does not increase in Africa, even though the number of children in school increases, because of rapid population growth. Education is key to improvements in Africa's socioeconomic growth. Thus, Africa, is underpopulated in terms of potentiality but overpopulated in terms of reality, current conditions, and possibilities of overexploitation. Africa needs to invest in human resources. Families need to save, and to so, they must refrain from having many children. Africa should resist the temptation to waste, as rich countries do, and denounce it. Africa needs to become more independent of these countries, but structural adjustment plans, growing debt, and rapid population growth limit national independence. Food aid is a means for developed countries to dominate developing countries. Modernization through foreign aid has had some positive effects on developing countries (e.g., improved hygiene, mortality reduction), but these also sparked rapid population growth. Rwandan society is no longer traditional, but it is also not yet modern. A change in mentality to fewer births, better quality of life for living infants, better education, and less burden for women must occur

Online fingerprint verification.

Science.gov (United States)

Upendra, K; Singh, S; Kumar, V; Verma, H K

2007-01-01

As organizations search for more secure authentication methods for user access, e-commerce, and other security applications, biometrics is gaining increasing attention. With an increasing emphasis on the emerging automatic personal identification applications, fingerprint based identification is becoming more popular. The most widely used fingerprint representation is the minutiae based representation. The main drawback with this representation is that it does not utilize a significant component of the rich discriminatory information available in the fingerprints. Local ridge structures cannot be completely characterized by minutiae. Also, it is difficult quickly to match two fingerprint images containing different number of unregistered minutiae points. In this study filter bank based representation, which eliminates these weakness, is implemented and the overall performance of the developed system is tested. The results have shown that this system can be used effectively for secure online verification applications.

Exploring individual differences in online and face-to-face help-seeking intentions in case of impending mental health problems: The role of adult attachment, perceived social support, psychological distress and self-stigma

Directory of Open Access Journals (Sweden)

Jennifer Apolinário-Hagen

2016-11-01

Full Text Available Background: Even though common mental health problems such as depression are a global burden calling for efficient prevention strategies, still many distressed individuals face hurdles to access public mental healthcare. Thus, computerized Internet-based psychological services have been suggested as viable approach to overcome barriers, such as self-stigma, and to inform the access to professional support on a large scale. However, little research has targeted predictors of online and face-to-face help-seeking intentions. Objective: This study aimed at determining whether associations between attachment insecurity and the willingness to seek online versus face-to-face counselling in case of impending emotional problems are mediated by both perceived social support and psychological distress and moderated by self-stigma. Methods: Data was collected from 301 adults from the German-speaking general population (age: M = 34.42, SD = 11.23; range: 18 - 65 years; 72.1% female through an anonymous online survey. Determinants of seeking help were assessed with the self-report measures Experiences in Close Relationship-Scale, Perceived Stress Questionnaire, ENRICHD-Social Support Inventory and an adapted version of the General Help Seeking Questionnaire (i.e. case vignette. Mediation analyses were performed with the SPSS-macro PROCESS by Hayes. Results: About half of the sample indicated being not aware of online counselling. As expected, insecure attachment was associated with less perceived social support and increased psychological distress. Mediational analyses revealed negative relationships between both attachment avoidance and self-stigma with face-to-face help-seeking intentions. Moreover, the relationship between attachment anxiety and the willingness to seek face-to-face counselling was mediated by social support. In contrast, none of the predictors of online counselling was statistically significant. Conclusions: Overall, this study identified

Media Rich, Media Poor: Two Studies of Diversity in Agenda-Holding

Science.gov (United States)

Chaffee, Steven H.; Wilson, Donna G.

1977-01-01

Results of a Wisconsin study and a national study indicate that media richness of a community is associated with greater diversity in the public problems agenda held by the citizens of that community. (GW)

A General State-Space Formulation for Online Scheduling

Directory of Open Access Journals (Sweden)

Dhruv Gupta

2017-11-01

Full Text Available We present a generalized state-space model formulation particularly motivated by an online scheduling perspective, which allows modeling (1 task-delays and unit breakdowns; (2 fractional delays and unit downtimes, when using discrete-time grid; (3 variable batch-sizes; (4 robust scheduling through the use of conservative yield estimates and processing times; (5 feedback on task-yield estimates before the task finishes; (6 task termination during its execution; (7 post-production storage of material in unit; and (8 unit capacity degradation and maintenance. Through these proposed generalizations, we enable a natural way to handle routinely encountered disturbances and a rich set of corresponding counter-decisions. Thereby, greatly simplifying and extending the possible application of mathematical programming based online scheduling solutions to diverse application settings. Finally, we demonstrate the effectiveness of this model on a case study from the field of bio-manufacturing.

Are online gamblers more at risk than offline gamblers?

Science.gov (United States)

Kairouz, Sylvia; Paradis, Catherine; Nadeau, Louise

2012-03-01

To characterize and compare sociodemographic profiles, game-play patterns, and level of addictive behaviors among adults who gamble online and those who do not, and to examine if, at the population level, online gambling is associated with more risky behaviors than offline gambling. Respondents were 8,456 offline gamblers and 111 online gamblers who participated in a population-based survey conducted in the province of Québec, in 2009. The study sample is representative of adult general population. There is an unequal distribution of online gambling in the population. A disproportionate number of men, young people, and students say they participate in online gambling. Poker players are overrepresented among online gamblers and gambling behaviors tend to be more excessive on the Internet. Compared with offline gamblers, online gamblers report more co-occurring risky behaviors, namely alcohol and cannabis use. Those who gamble online appear to be more at risk for gambling-related problems, but the present findings alone cannot be used as evidence for that conclusion. Future research designs could combine longitudinal data collection and multilevel analyses to provide more insight into the causal mechanisms associated with online gambling.

Spectroscopy of proton-rich nuclei in the rare earth region

International Nuclear Information System (INIS)

Toth, K.S.; Nitschke, J.M.; Vierinen, K.S.; Wilmarth, P.A.; Firestone, R.B.; Kortelahti, M.O.

1990-01-01

The isotope separator facility OASIS, on-line at the Lawrence Berkeley Laboratory SuperHILAC, was used to investigate proton-rich rare earth nuclei. Single-particle states near the 82-neutron shell were delineated, numerous new isotopes, isomers, and β-delayed proton emitters were discovered and the α-decay properties of some nuclides with N > 84 were reexamined. In this contribution the experimental program is summarized briefly, the excitation energies of the s 1/2 and h 11/2 proton states in this mass region are discussed, and results on the β-delayed-proton spectra of 145 Dy and 147 Er are presented. 17 refs., 5 figs

Project-Based Learning and Student Knowledge Construction during Asynchronous Online Discussion

Science.gov (United States)

Koh, Joyce Hwee Ling; Herring, Susan C.; Hew, Khe Foon

2010-01-01

Project-based learning engages students in problem solving through artefact design. However, previous studies of online project-based learning have focused primarily on the dynamics of online collaboration; students' knowledge construction throughout this process has not been examined thoroughly. This case study analyzed the relationship between…

On the efficiency of a randomized mirror descent algorithm in online optimization problems

Science.gov (United States)

Gasnikov, A. V.; Nesterov, Yu. E.; Spokoiny, V. G.

2015-04-01

A randomized online version of the mirror descent method is proposed. It differs from the existing versions by the randomization method. Randomization is performed at the stage of the projection of a subgradient of the function being optimized onto the unit simplex rather than at the stage of the computation of a subgradient, which is common practice. As a result, a componentwise subgradient descent with a randomly chosen component is obtained, which admits an online interpretation. This observation, for example, has made it possible to uniformly interpret results on weighting expert decisions and propose the most efficient method for searching for an equilibrium in a zero-sum two-person matrix game with sparse matrix.

Investigation of an online, problem-based introduction to nuclear sciences: A case study

International Nuclear Information System (INIS)

Schmidt, M.; Easter, M.; Jiazhen, W.; Jonassen, D.

2006-01-01

An online, grant-funded course on nuclear engineering in society was developed at a large Midwestern university with the goal of providing non-majors a meaningful introduction to the many applications of nuclear science in a modern society and to stimulate learner interest in academic studies and/or professional involvement in nuclear science. Using a within-site case study approach, the current study focused on the efficacy of the online learning environment's support of learners' acquisition of knowledge and the impact of the environment on learners' interest in and beliefs about nuclear sciences in society. Findings suggest the environment successfully promoted learning and had a positive impact on learners' interests and beliefs. (authors)

Investigation of an online, problem-based introduction to nuclear sciences: A case study

Energy Technology Data Exchange (ETDEWEB)

Schmidt, M.; Easter, M.; Jiazhen, W.; Jonassen, D. [Univ. of Missouri - Columbia, 111 London Hall, Columbia, MO 65211 (United States)

2006-07-01

An online, grant-funded course on nuclear engineering in society was developed at a large Midwestern university with the goal of providing non-majors a meaningful introduction to the many applications of nuclear science in a modern society and to stimulate learner interest in academic studies and/or professional involvement in nuclear science. Using a within-site case study approach, the current study focused on the efficacy of the online learning environment's support of learners' acquisition of knowledge and the impact of the environment on learners' interest in and beliefs about nuclear sciences in society. Findings suggest the environment successfully promoted learning and had a positive impact on learners' interests and beliefs. (authors)

Online measurement of mental representations of complex spatial decision problems : comparison of CNET and hard laddering

NARCIS (Netherlands)

Horeni, O.; Arentze, T.A.; Dellaert, B.G.C.; Timmermans, H.J.P.

2014-01-01

This paper introduces the online Causal Network Elicitation Technique (CNET), as a technique for measuring components of mental representations of choice tasks and compares it with the more common technique of online 'hard' laddering (HL). While CNET works in basically two phases, one in open

Online citizen science games: Opportunities for the biological sciences.

Science.gov (United States)

Curtis, Vickie

2014-12-01

Recent developments in digital technologies and the rise of the Internet have created new opportunities for citizen science. One of these has been the development of online citizen science games where complex research problems have been re-imagined as online multiplayer computer games. Some of the most successful examples of these can be found within the biological sciences, for example, Foldit, Phylo and EteRNA. These games offer scientists the opportunity to crowdsource research problems, and to engage with those outside the research community. Games also enable those without a background in science to make a valid contribution to research, and may also offer opportunities for informal science learning.

Factors that Influence Students' Decision to Dropout of Online Courses

Science.gov (United States)

Willging, Pedro A.; Johnson, Scott D.

2009-01-01

Although there are many reasons why students dropout of college courses, those reasons may be unique for students who are enrolled in an online program. Issues of isolation, disconnectedness, and technological problems may be factors that influence a student to leave a course. To understand these factors, an online survey was developed to collect…

Online measurement of mental representations of complex spatial decision problems : Comparison of CNET and hard laddering

NARCIS (Netherlands)

O. Horeni (Oliver); T.A. Arentze (Theo); B.G.C. Dellaert (Benedict); H.J.P. Timmermans (Harry)

2013-01-01

textabstractThis paper introduces the online Causal Network Elicitation Technique (CNET), as a technique for measuring components of mental representations of choice tasks and compares it with the more common technique of online ‘hard’ laddering (HL). While CNET works in basically two phases, one in

Online Chat Dependency: The Influence of Social Anxiety

Science.gov (United States)

Wang, Chih-Chien; Chang, Shu-Chen

Recent developments in information technology have made it easy for people to “chat” online with others in real time, and many do so regularly. “Virtual” relationships can be attractive, especially for people with social interaction problems in the “real world”. This study examines the influence on online chat dependency of three dimensions of social anxiety: general social situation fear, negative evaluation fear, and novel social situation fear. Participants of this study were 454 college students. The survey results show that negative evaluation fear and general social situation fear are relative to online chat dependency, while novel social situation fear does not seem to be a relevant factor.

Learners' Perceived Information Overload in Online Learning via Computer-Mediated Communication

Science.gov (United States)

Chen, Chun-Ying; Pedersen, Susan; Murphy, Karen L.

2011-01-01

Many studies report information overload as one of the main problems that students encounter in online learning via computer-mediated communication. This study aimed to explore the sources of online students' information overload and offer suggestions for increasing students' cognitive resources for learning. Participants were 12 graduate students…

A Preliminary Methodology, and a Cautionary Tale, for Determining How Students Seek Research Help Online

Science.gov (United States)

Pellegrino, Catherine

2014-01-01

This article reports on a pilot study to examine undergraduate students' help-seeking behavior when undertaking library research in online courses. A novel methodology incorporating elements of ethnographic research resulted in a small, but rich and detailed, collection of qualitative data. The data suggest that the methodology has promise for…

Taiwanese EFL Learners’ Perceived Use of Online Reading Strategies

OpenAIRE

Lisa Wen Chun Chen

2015-01-01

Reading strategies are beneficial to learners’ reading comprehension. The strategies can be divided into different categories, such as global reading strategies, problem solving strategies and support strategies. Most previous studies investigated the importance of reading strategies in the paper-based reading. However, relatively few studies examined online reading strategies and their effects on reading comprehension. Online reading materials are important sources for EFL stu...

An exploratory study of the association between online gaming addiction and enjoyment motivations for playing massively multiplayer online role-playing games

OpenAIRE

Hussain, Z; Williams, GA; Griffiths, MD

2015-01-01

Massively multiplayer online role-playing games (MMORPGs) are a popular form of entertainment used by millions of gamers worldwide. Potential problems relating to MMORPG play have emerged, particularly in relation to being addicted to playing in such virtual environments. In the present study, factors relating to online gaming addiction and motivations for playing in MMORPGs were examined to establish whether they were associated with addiction. A sample comprised 1,167 gamers who were survey...

Data Quality in Online Health Social Networks for Chronic Diseases

Science.gov (United States)

Venkatesan, Srikanth

2017-01-01

Can medical advice from other participants in online health social networks impact patient safety? What can we do alleviate this problem? How does the accuracy of information on such networks affect the patients?. There has been a significant increase , in recent years, in the use of online health social network sites as more patients seek to…

Writing Performance of At-Risk Learners in Online Credit Recovery

Science.gov (United States)

Leiter, Michael P.

2012-01-01

Online credit recovery is becoming a popular choice for students needing to recover lost graduation credit due to course failure. The problem is that high school students who take online credit recovery classes in order to gain writing credit for graduation are failing the writing section on the state merit exam (MME). At-risk students and…

Time distortion for expert and novice online game players.

Science.gov (United States)

Rau, Pei-Luen Patrick; Peng, Shu-Yun; Yang, Chin-Chow

2006-08-01

Online game addiction is a new mental disorder. This disorder is difficult to describe because of its comprehensive nature. Many online game players have problems controlling their playing time. They cannot stop playing a game that they enjoy. This research surveyed the past literature on "flow" and time disorder theory. A time distortion experiment was conducted. This research invited 64 children, teenagers, and young adults to investigate player skill and playing time effects on online game break-off. The playing experience and degree of time distortion were measured and analyzed. The results showed that both novice and expert online game players were subject to time distortion. The participants had difficulty breaking off from the game without intrusion by others in the real world. This research also suggests eight questions for self-evaluation for online game addiction.

Electronic Interests and Behaviours Associated with Gambling Problems

Science.gov (United States)

Phillips, James G.; Ogeil, Rowan P.; Blaszczynski, Alex

2012-01-01

Multiple computing devices continue to develop capabilities that support online gambling, resulting in the need to evaluate the extent that this trend will contribute to gambling problems. A sample of 1,141 participants completed an online survey assessing interest in and difficulties limiting use of digital services. Questionnaire items measured…

Robust on-line monitoring of biogas processes; Robusta maettekniker on-line foer optimerad biogasproduktion

Energy Technology Data Exchange (ETDEWEB)

Nordberg, Aake; Hansson, Mikael; Kanerot, Mija; Krozer, Anatol; Loefving, Bjoern; Sahlin, Eskil

2010-03-15

Although demand for biomethane in Sweden is higher than ever, many Swedish codigestion plants are presently operated below their designed capacity. Efforts must be taken to increase the loading rate and guarantee stable operation and high availability of the plants. There are currently no commercial systems for on-line monitoring, and due to the characteristics of the material, including corrosion and tearing, robust applications have to be developed. The objective of this project was to identify and study different monitoring technologies with potential for on-line monitoring of both substrate mixtures and anaerobic digester content. Based on the prerequisites and demands at Boraas Energi och Miljoe AB's (BEMAB, the municipal energy and waste utility in the city of Boraas, Sweden) biogas plant, the extent of the problems, measurement variables and possible ways of managing these issues have been identified and prioritized. The substrate mixtures in question have a high viscosity and are inhomogeneous with variation in composition, which calls for further homogenization, dilution and filtration to achieve high precision in the necessary analyses. Studies of using different mixers and mills showed that the particle size (800 mum) needed for on-line COD measurement could not be achieved. The problem of homogenization can be avoided if indirect measurement methods are used. Laboratory tests with NIR (near-infra red spectroscopy) showed that VS can be predicted (R2=0,78) in the interval of 2-9% VS. Furthermore, impedance can give a measurement of soluble components. However, impedance is not sensitive enough to give a good measurement of total TS. Microwave technology was installed at the production plant and showed a faster response to changes in TS than the existing TS-sensor. However, due to technical problems, the evaluation only could be done during a limited period of ten days. BEMAB will continue the measurements and evaluation of the instrument. The

The mediating effect of gaming motivation between psychiatric symptoms and problematic online gaming: an online survey.

Science.gov (United States)

Király, Orsolya; Urbán, Róbert; Griffiths, Mark D; Ágoston, Csilla; Nagygyörgy, Katalin; Kökönyei, Gyöngyi; Demetrovics, Zsolt

2015-04-07

The rapid expansion of online video gaming as a leisure time activity has led to the appearance of problematic online gaming (POG). According to the literature, POG is associated with different psychiatric symptoms (eg, depression, anxiety) and with specific gaming motives (ie, escape, achievement). Based on studies of alcohol use that suggest a mediator role of drinking motives between distal influences (eg, trauma symptoms) and drinking problems, this study examined the assumption that there is an indirect link between psychiatric distress and POG via the mediation of gaming motives. Furthermore, it was also assumed that there was a moderator effect of gender and game type preference based on the important role gender plays in POG and the structural differences between different game types. This study had two aims. The first aim was to test the mediating role of online gaming motives between psychiatric symptoms and problematic use of online games. The second aim was to test the moderator effect of gender and game type preference in this mediation model. An online survey was conducted on a sample of online gamers (N=3186; age: mean 21.1, SD 5.9 years; male: 2859/3186, 89.74%). The Brief Symptom Inventory (BSI), the Motives for Online Gaming Questionnaire (MOGQ), and the Problematic Online Gaming Questionnaire (POGQ) were administered to assess general psychiatric distress, online gaming motives, and problematic online game use, respectively. Structural regression analyses within structural equation modeling were used to test the proposed mediation models and multigroup analyses were used to test gender and game type differences to determine possible moderating effects. The mediation models fitted the data adequately. The Global Severity Index (GSI) of the BSI indicated that the level of psychiatric distress had a significant positive direct effect (standardized effect=.35, Pgaming motives: escape (standardized effect=.139, Pgaming (standardized effect size=.64

Graph Design via Convex Optimization: Online and Distributed Perspectives

Science.gov (United States)

Meng, De

Network and graph have long been natural abstraction of relations in a variety of applications, e.g. transportation, power system, social network, communication, electrical circuit, etc. As a large number of computation and optimization problems are naturally defined on graphs, graph structures not only enable important properties of these problems, but also leads to highly efficient distributed and online algorithms. For example, graph separability enables the parallelism for computation and operation as well as limits the size of local problems. More interestingly, graphs can be defined and constructed in order to take best advantage of those problem properties. This dissertation focuses on graph structure and design in newly proposed optimization problems, which establish a bridge between graph properties and optimization problem properties. We first study a new optimization problem called Geodesic Distance Maximization Problem (GDMP). Given a graph with fixed edge weights, finding the shortest path, also known as the geodesic, between two nodes is a well-studied network flow problem. We introduce the Geodesic Distance Maximization Problem (GDMP): the problem of finding the edge weights that maximize the length of the geodesic subject to convex constraints on the weights. We show that GDMP is a convex optimization problem for a wide class of flow costs, and provide a physical interpretation using the dual. We present applications of the GDMP in various fields, including optical lens design, network interdiction, and resource allocation in the control of forest fires. We develop an Alternating Direction Method of Multipliers (ADMM) by exploiting specific problem structures to solve large-scale GDMP, and demonstrate its effectiveness in numerical examples. We then turn our attention to distributed optimization on graph with only local communication. Distributed optimization arises in a variety of applications, e.g. distributed tracking and localization, estimation

From Distance Education to Online Education.

Science.gov (United States)

Mason, Robin

2000-01-01

Describes the history and development of the United Kingdom's Open University from a print-based distance teaching institution to an electronic university. Discusses computer conferencing, including problems and successes with implementation; barriers to use; research and development; designing and teaching online courses; and the Open University…

New Unconditional Hardness Results for Dynamic and Online Problems

DEFF Research Database (Denmark)

Clifford, Raphaël; Jørgensen, Allan Grønlund; Larsen, Kasper Green

2015-01-01

Data summarization is an effective approach to dealing with the 'big data' problem. While data summarization problems traditionally have been studied is the streaming model, the focus is starting to shift to distributed models, as distributed/parallel computation seems to be the only viable way...... to handle today's massive data sets. In this paper, we study ε-approximations, a classical data summary that, intuitively speaking, preserves approximately the density of the underlying data set over a certain range space. We consider the problem of computing ε-approximations for a data set which is held...

Nurse Educators' Perceptions of Quality in Online Graduate Education as a Credential for Hiring Nursing Faculty

Science.gov (United States)

Post, Jerri L.

2013-01-01

The problem explored in this study focused on the attitudes of nurse educators toward online degrees in relation to hiring practices. With the proliferation of online courses and degrees, research has shown that the acceptability of online degrees has become a concern for graduates of online programs seeking jobs and for potential employers. A…

Ring recognition in the CBM RICH detector

International Nuclear Information System (INIS)

Lebedev, S.; Ososkov, G.; Hoehne, C.

2007-01-01

Two algorithms of ring recognition, a standalone ring finder (using only RICH information) and an algorithm based on the information from vertex tracks are described. The fake ring problem and its solution using a set of two-dimensional cuts or an artificial neural network are discussed. Results of a comparative study are given. All developed algorithms were tested on large statistics of simulated events and were then included into the CBM framework for common use

Online Resources

Indian Academy of Sciences (India)

Home; Journals; Journal of Genetics; Online Resources. Journal of Genetics. Online Resources. Volume 97. 2018 | Online resources. Volume 96. 2017 | Online resources. Volume 95. 2016 | Online resources. Volume 94. 2015 | Online resources. Volume 93. 2014 | Online resources. Volume 92. 2013 | Online resources ...

Hiding in Plain Sight: Street artists online

Directory of Open Access Journals (Sweden)

Kim Barbour

2013-10-01

Full Text Available Identity and privacy concerns related to social media are the subject of widespread academic enquiry and mass media reporting. Although in most circumstances academic research tends to present identity play and online self­presentation as positive, media reporting in Australia makes much of the risks of identity theft, privacy breaches and online predators. This research explores the phenomenological experience of creating an online persona, focusing particularly on street artists. For street artists, the threat of unwanted exposure has to be balanced with the positive implications of sharing their creative work outside its geographical and temporal constraints. I argue that street artists use complex persona­creation strategies in order to both protect and promote themselves. The two street artists discussed in this article experience their engagement with social media and digital networks in ways that offer new insight into the opportunities and problems associated with the presentation of a persona online.

Enhancing the Accounting Major with Online Learning

Directory of Open Access Journals (Sweden)

Hershey Friedman Ph.D

2013-07-01

Full Text Available Accounting majors who wish to be successful in life must learn to acquire knowledge using all kinds of platforms. The belief that the only way people can learn is by classroom instruction is not supported by research. The authors show how online learning is an important tool for achieving the various goals of accounting education that should include creativity, collaboration, communication, critical thinking and problem solving. The authors conclude that the optimal method to teach accounting is by combining face-to-face learning with on-line learning.

Problem-Solving: Scaling the "Brick Wall"

Science.gov (United States)

Benson, Dave

2011-01-01

Across the primary and secondary phases, pupils are encouraged to use and apply their knowledge, skills, and understanding of mathematics to solve problems in a variety of forms, ranging from single-stage word problems to the challenge of extended rich tasks. Amongst many others, Cockcroft (1982) emphasised the importance and relevance of…

Gene2Function: An Integrated Online Resource for Gene Function Discovery

Directory of Open Access Journals (Sweden)

Yanhui Hu

2017-08-01

Full Text Available One of the most powerful ways to develop hypotheses regarding the biological functions of conserved genes in a given species, such as humans, is to first look at what is known about their function in another species. Model organism databases and other resources are rich with functional information but difficult to mine. Gene2Function addresses a broad need by integrating information about conserved genes in a single online resource.

Metacognitive Online Reading Strategies in Foreign Language Learning Context at University

Directory of Open Access Journals (Sweden)

Vilhelmina Vaičiūnienė

2014-03-01

Full Text Available Purpose – this research is aimed to identify the metacognitive online reading strategies employed by MRU students and assess the interrelation between online reading strategies and metacognitive awareness.Design/methodology/approach – the authors present and evaluate the findings obtained by using Online Survey of Reading Strategies (OSORS, the survey, which helped to identify MRU students’ metacognitive online reading strategies in a foreign language learning context. The methods applied in the research were the following ones: literature review and descriptive analysis of the obtained quantitative data. The quantitative research and descriptive analysis of the data received from the survey was applied. The target group of the study conducted at MRU consisted of 89 full-time students having different online reading experience. The sample was composed of students from five Bachelor study programmes studying in the academic year of 2012-2013. The instrument of the research (OSORS was composed of 38 items.Findings – the findings obtained through the survey revealed that readers work directly with the text to solve problems while reading online. However, a low score on any of the subscales of the inventory (i.e. Support strategies use indicates that there may be strategies in these parts that students might want to learn about and consider using them when reading online. By focusing students’ attention on the metacognitive reading strategies identified in the OSORS language, teachers could help students improve their online reading ability. Teachers should include strategy awareness as training component in their students’ online learning tasks.Research limitations/implications – the research sample is rather limited (89 participants.Practical implications – seeking to develop students’ online reading capacity, it is valuable for teachers to discover students’ preferences for online reading strategies and identify encountered

Information filtering in sparse online systems: recommendation via semi-local diffusion.

Science.gov (United States)

Zeng, Wei; Zeng, An; Shang, Ming-Sheng; Zhang, Yi-Cheng

2013-01-01

With the rapid growth of the Internet and overwhelming amount of information and choices that people are confronted with, recommender systems have been developed to effectively support users' decision-making process in the online systems. However, many recommendation algorithms suffer from the data sparsity problem, i.e. the user-object bipartite networks are so sparse that algorithms cannot accurately recommend objects for users. This data sparsity problem makes many well-known recommendation algorithms perform poorly. To solve the problem, we propose a recommendation algorithm based on the semi-local diffusion process on the user-object bipartite network. The simulation results on two sparse datasets, Amazon and Bookcross, show that our method significantly outperforms the state-of-the-art methods especially for those small-degree users. Two personalized semi-local diffusion methods are proposed which further improve the recommendation accuracy. Finally, our work indicates that sparse online systems are essentially different from the dense online systems, so it is necessary to reexamine former algorithms and conclusions based on dense data in sparse systems.

What Explains Patterns of Diversification and Richness among Animal Phyla?

Science.gov (United States)

Jezkova, Tereza; Wiens, John J

2017-03-01

Animal phyla vary dramatically in species richness (from one species to >1.2 million), but the causes of this variation remain largely unknown. Animals have also evolved striking variation in morphology and ecology, including sessile marine taxa lacking heads, eyes, limbs, and complex organs (e.g., sponges), parasitic worms (e.g., nematodes, platyhelminths), and taxa with eyes, skeletons, limbs, and complex organs that dominate terrestrial ecosystems (arthropods, chordates). Relating this remarkable variation in traits to the diversification and richness of animal phyla is a fundamental yet unresolved problem in biology. Here, we test the impacts of 18 traits (including morphology, ecology, reproduction, and development) on diversification and richness of extant animal phyla. Using phylogenetic multiple regression, the best-fitting model includes five traits that explain ∼74% of the variation in diversification rates (dioecy, parasitism, eyes/photoreceptors, a skeleton, nonmarine habitat). However, a model including just three (skeleton, parasitism, habitat) explains nearly as much variation (∼67%). Diversification rates then largely explain richness patterns. Our results also identify many striking traits that have surprisingly little impact on diversification (e.g., head, limbs, and complex circulatory and digestive systems). Overall, our results reveal the key factors that shape large-scale patterns of diversification and richness across >80% of all extant, described species.

Intelligent on-line fault tolerant control for unanticipated catastrophic failures.

Science.gov (United States)

Yen, Gary G; Ho, Liang-Wei

2004-10-01

As dynamic systems become increasingly complex, experience rapidly changing environments, and encounter a greater variety of unexpected component failures, solving the control problems of such systems is a grand challenge for control engineers. Traditional control design techniques are not adequate to cope with these systems, which may suffer from unanticipated dynamic failures. In this research work, we investigate the on-line fault tolerant control problem and propose an intelligent on-line control strategy to handle the desired trajectories tracking problem for systems suffering from various unanticipated catastrophic faults. Through theoretical analysis, the sufficient condition of system stability has been derived and two different on-line control laws have been developed. The approach of the proposed intelligent control strategy is to continuously monitor the system performance and identify what the system's current state is by using a fault detection method based upon our best knowledge of the nominal system and nominal controller. Once a fault is detected, the proposed intelligent controller will adjust its control signal to compensate for the unknown system failure dynamics by using an artificial neural network as an on-line estimator to approximate the unexpected and unknown failure dynamics. The first control law is derived directly from the Lyapunov stability theory, while the second control law is derived based upon the discrete-time sliding mode control technique. Both control laws have been implemented in a variety of failure scenarios to validate the proposed intelligent control scheme. The simulation results, including a three-tank benchmark problem, comply with theoretical analysis and demonstrate a significant improvement in trajectory following performance based upon the proposed intelligent control strategy.

Preparing for Distance Learning: Designing An Online Student Orientation Course

Directory of Open Access Journals (Sweden)

Diane D. Chapman

2004-01-01

Full Text Available This paper describes the analysis undertaken to design a 1-credit-hour online orientation course for students new to online learning. An instructional design team, as a part of an advanced instructional design course, worked with a university-based client. The client identified specific problem areas encountered by novice students of online courses and the team designed a comprehensive program to meet those needs. Analysis of the data revealed surprising differences in expectations between instructors of online courses and their students of what an orientation to online learning should include. The team also conducted a task analysis to aid in further identifying the skills, knowledge and attitudes required by students for success in online courses. Findings indicated that there is a need for online learners to understand the time commitment required of an online course and possess or develop strong time management skills. Because of small sample size, results cannot be generalized beyond the respondents. The authors found a mismatch in the perception of instructor technical skills versus student technical skill. Based on their findings, the paper provides recommendations on the appropriate design, development and implementation of an orientation to online learning.

Marshaling Resources: A Classic Grounded Theory Study of Online Learners

Directory of Open Access Journals (Sweden)

Barbara Yalof

2014-06-01

Full Text Available Classic grounded theory (CGT was used to identify a main concern of online students in higher education. One of the main impediments to studying online is a sense of isolation and lack of access to support systems as students navigate through complex requirements of their online programs. Hypothetical probability statements illustrate the imbalance between heightened needs of virtual learners and perceived inadequate support provided by educational institutions. The core variable, marshaling resources, explains how peer supports sustain motivation toward successful program completion. Understanding the critical contribution virtual interpersonal networks make towards maximizing resources by group problem solving is a significant aspect of this theory. Keywords: Online learning, e-learning, personal learning networks, peer networks

CATER: An onlne problem tracking facility for SLC

International Nuclear Information System (INIS)

Sass, R.C.; Shoaee, H.

1993-05-01

An online facility has been developed for SLC to organize and simplify the management of all problems encountered in the operation of the accelerator. CATER (Computer Aided Trouble Entry and Reporting) may be used to make the initial entry of a problem, to enter one or more solutions to a problem, to modify or closeout a problem, to generate a variety of pre-defined reports giving status and statistical summaries, and to allow anyone to browse the database. All phases of CATER can take place on the operator console, workstations, or on any ANSI compatible terminal. The user interface is designed around a menu driven windowed environment with a large amount of context sensitive help information to alleviate the need for consulting user documentation. Currently, the CATER database contains information on more than 30,000 problems entered since it went online in January of 1988. The features of the software and some implementation details will be presented

Teaching Renewable Energy Using Online PBL in Investigating Its Effect on Behaviour towards Energy Conservation among Malaysian Students: ANOVA Repeated Measures Approach

Science.gov (United States)

Nordin, Norfarah; Samsudin, Mohd Ali; Harun, Abdul Hadi

2017-01-01

This research aimed to investigate whether online problem based learning (PBL) approach to teach renewable energy topic improves students' behaviour towards energy conservation. A renewable energy online problem based learning (REePBaL) instruction package was developed based on the theory of constructivism and adaptation of the online learning…

The Mediating Effect of Gaming Motivation Between Psychiatric Symptoms and Problematic Online Gaming: An Online Survey

Science.gov (United States)

Király, Orsolya; Urbán, Róbert; Griffiths, Mark D; Ágoston, Csilla; Nagygyörgy, Katalin; Kökönyei, Gyöngyi

2015-01-01

Background The rapid expansion of online video gaming as a leisure time activity has led to the appearance of problematic online gaming (POG). According to the literature, POG is associated with different psychiatric symptoms (eg, depression, anxiety) and with specific gaming motives (ie, escape, achievement). Based on studies of alcohol use that suggest a mediator role of drinking motives between distal influences (eg, trauma symptoms) and drinking problems, this study examined the assumption that there is an indirect link between psychiatric distress and POG via the mediation of gaming motives. Furthermore, it was also assumed that there was a moderator effect of gender and game type preference based on the important role gender plays in POG and the structural differences between different game types. Objective This study had two aims. The first aim was to test the mediating role of online gaming motives between psychiatric symptoms and problematic use of online games. The second aim was to test the moderator effect of gender and game type preference in this mediation model. Methods An online survey was conducted on a sample of online gamers (N=3186; age: mean 21.1, SD 5.9 years; male: 2859/3186, 89.74%). The Brief Symptom Inventory (BSI), the Motives for Online Gaming Questionnaire (MOGQ), and the Problematic Online Gaming Questionnaire (POGQ) were administered to assess general psychiatric distress, online gaming motives, and problematic online game use, respectively. Structural regression analyses within structural equation modeling were used to test the proposed mediation models and multigroup analyses were used to test gender and game type differences to determine possible moderating effects. Results The mediation models fitted the data adequately. The Global Severity Index (GSI) of the BSI indicated that the level of psychiatric distress had a significant positive direct effect (standardized effect=.35, Pgaming motives: escape (standardized effect=.139

Psychopathology of Online Poker Players: Review of Literature.

Science.gov (United States)

Moreau, Axelle; Chabrol, Henri; Chauchard, Emeline

2016-06-01

Background and aims Online Texas Hold'em poker has become a spectacular form of entertainment in our society, and the number of people who use this form of gambling is increasing. It seems that online poker activity challenges existing theoretical concepts about problem gambling behaviors. The purpose of this literature review is to provide a current overview about the population of online poker players. Methods To be selected, articles had to focus on psychopathology in a sample of online poker players, be written in English or French, and be published before November 2015. A total of 17 relevant studies were identified. Results In this population, the proportion of problematic gamblers was higher than in other forms of gambling. Several factors predicting excessive gambling were identified such as stress, internal attribution, dissociation, boredom, negative emotions, irrational beliefs, anxiety, and impulsivity. The population of online poker players is largely heterogeneous, with experimental players forming a specific group. Finally, the validity of the tools used to measure excessive or problematic gambling and irrational beliefs are not suitable for assessing online poker activity. Discussion and conclusions Future studies need to confirm previous findings in the literature of online poker games. Given that skills are important in poker playing, skill development in the frames of excessive use of online poker should be explored more in depth, particularly regarding poker experience and loss chasing. Future research should focus on skills, self-regulation, and psychopathology of online poker players.

A Study of Interaction Patterns and Awareness Design Elements in a Massively Multiplayer Online Game

Directory of Open Access Journals (Sweden)

Tiffany Y. Tang

2008-01-01

Full Text Available Massively multiplayer online games (MMOGs have been known to create rich and versatile social worlds for thousands of millions of players to participate. As such, various game elements and advance technologies such as artificial intelligence have been applied to encourage and facilitate social interactions in these online communities, the key to the success of MMOGs. However, there is a lack of studies addressing the usability of these elements in games. In this paper, we look into interaction patterns and awareness design elements that support the awareness in LastWorld and FairyLand. Experimental results obtained through both in-game experiences and player interviews reveal that not all awareness tools (e.g., an in-game map have been fully exploited by players. In addition, those players who are aware of these tools are not satisfied with them. Our findings suggest that awareness-oriented tools/channels should be easy to interpret and rich in conveying “knowledge” so as to reduce players-cognitive overload. These findings of this research recommend considerations of early stage MMOG design.

Online Gambling among Treatment-Seeking Patients in Singapore: A Cross-Sectional Study.

Science.gov (United States)

Zhang, Melvyn; Yang, Yi; Guo, Song; Cheok, Chris; Wong, Kim Eng; Kandasami, Gomathinayagam

2018-04-23

Given that technology has greatly facilitated easier access to gambling in previous years, it is timely to look in-depth into online gambling activities and behaviors. There have been several studies that examined online gambling. However, most of the current studies to date have focused on determining the prevalence and the epidemiology of problem gambling arising from online gambling in Western cohorts. There remains a paucity of research looking at the problem of online gambling among Asian individuals. The objectives of the current study are to elucidate the characteristics of online gambling among an Asian cohort and to explore the harm associated with online gambling and the potential mechanisms by which harm associated with online gambling could be minimized. It is hoped that the findings of the current paper will bridge the existing gaps in the research literature. A cross-sectional study design was utilized to recruit 100 participants who were attending outpatient services at the National Addictions Management Service (NAMS) from March 2014 to October 2015. The majority of the participants were male, of Chinese ethnicity and under the age of 30 years old (48%). Mobile phones and smartphones were the most commonly utilized platforms for gambling online. The median largest ever debt incurred as a result of online gambling ($20,000) was significantly more than that due to offline gambling ($500) ( Z = −4.17, p gambling ($7000) ( Z = −2.73, p gambling ($2000). A total of 18.4% of participants had waited between 1 to 2 years from their first online gambling experience to seek treatment and 17.3% had waited for more than 10 years. This is perhaps one of the first Asian studies to investigate the serious harm involved in online gambling. The findings from our study are intended to guide further interventions in the treatment of online gambling related disorders; and would be of interest to governmental organizations in their planning of regulations for online

Evaluating Online Bilingual Dictionaries: The Case of Popular Free English-Polish Dictionaries

Science.gov (United States)

Lew, Robert; Szarowska, Agnieszka

2017-01-01

Language learners today exhibit a strong preference for free online resources. One problem with such resources is that their quality can vary dramatically. Building on related work on monolingual resources for English, we propose an evaluation framework for online bilingual dictionaries, designed to assess lexicographic quality in four major…

On-line rituals: a new field of research: neo-pagan and Muslim cyber rituals

Directory of Open Access Journals (Sweden)

Göran Larsson

2003-01-01

Full Text Available Although secularisation and institutional specialisation have reduced the importance and influence of churchoriented religion, people still have a need for religion and transcendence. By looking at two so-called on-line rituals — a neo-pagan blot and a Muslim dhikr, the author examines and illustrates how religiosity may be articulated on the Internet. Although Internet research is often discussed in relation to methodological and theoretical problems, rituals performed on-line should be included in the academic study of religion. Common problems associated with Internet research (questions of representation, source criticism, etc. in themselves stimulate the development of new methods and theories for studying on-line religiosity.

TINJAUAN KRIMINOLOGI TERHADAP TINDAK PIDANA PENIPUAN JUAL BELI ONLINE

Directory of Open Access Journals (Sweden)

Wahyu Adi Susanto

2018-01-01

Full Text Available This study discusses the overview of Criminology Crime Against Scams Buy Sell Online. Who in real life is very rife due to the lack of security and surveillance conducted by public authorities, so that many victims of criminal fraud and selling online, supported and easy to commit a criminal act of buying and selling online with a variety of modes available. To resolve the problem it should be known what are the factors that caused the criminal act of buying and selling online in terms of criminology. And how do the efforts of law enforcement officers in dealing with criminal fraud and selling online. Writing of this method normative empirical research that aims to make the data in a systematic, factual, and accurate about the facts and what happens on the field sebenrnya. With a data sekuder and as a source of primary data. Factors that cause the Crime Fraud Buy Sell Online influenced by various factors such as economic factors, environmental factors, social and cultural factors, factors easily commit crimes of fraud and selling online, factor the lack of risk of being caught by

Online video game addiction: identification of addicted adolescent gamers.

Science.gov (United States)

Van Rooij, Antonius J; Schoenmakers, Tim M; Vermulst, Ad A; Van den Eijnden, Regina J J M; Van de Mheen, Dike

2011-01-01

To provide empirical data-driven identification of a group of addicted online gamers. Repeated cross-sectional survey study, comprising a longitudinal cohort, conducted in 2008 and 2009. Secondary schools in the Netherlands.   Two large samples of Dutch schoolchildren (aged 13-16 years). Compulsive internet use scale, weekly hours of online gaming and psychosocial variables. This study confirms the existence of a small group of addicted online gamers (3%), representing about 1.5% of all children aged 13-16 years in the Netherlands. Although these gamers report addiction-like problems, relationships with decreased psychosocial health were less evident. The identification of a small group of addicted online gamers supports efforts to develop and validate questionnaire scales aimed at measuring the phenomenon of online video game addiction. The findings contribute to the discussion on the inclusion of non-substance addictions in the proposed unified concept of 'Addiction and Related Disorders' for the DSM-V by providing indirect identification and validation of a group of suspected online video game addicts. © 2010 The Authors, Addiction © 2010 Society for the Study of Addiction.

New Technologies, New Problems, New Laws.

Science.gov (United States)

Recupero, Patricia R

2016-09-01

Forensic psychiatrists in the 21st century can expect to encounter technology-related social problems for which existing legal remedies are limited. In addition to the inadequate protection of adolescents using social media as outlined by Costello et al., current laws are often poorly suited to remedy problems such as cyberharassment, sexting among minors, and the publication of threatening or harmful communications online. Throughout history, technological developments have often preceded the introduction of new laws or the careful revision of existing laws. This pattern is evident in many of the newer social problems that involve technology, including cyberbullying, online impersonation, and revenge porn. As specialists working at the intersection of human behavior and the law, forensic psychiatrists are uniquely situated to help legal professionals and others understand the impact of internet-related problematic behaviors on victims and, perhaps, to assist in the development of new legal remedies that are better tailored to our increasingly digital society. © 2016 American Academy of Psychiatry and the Law.

Anxiety, Depression and Emotion Regulation Among Regular Online Poker Players.

Science.gov (United States)

Barrault, Servane; Bonnaire, Céline; Herrmann, Florian

2017-12-01

Poker is a type of gambling that has specific features, including the need to regulate one's emotion to be successful. The aim of the present study is to assess emotion regulation, anxiety and depression in a sample of regular poker players, and to compare the results of problem and non-problem gamblers. 416 regular online poker players completed online questionnaires including sociodemographic data, measures of problem gambling (CPGI), anxiety and depression (HAD scale), and emotion regulation (ERQ). The CPGI was used to divide participants into four groups according to the intensity of their gambling practice (non-problem, low risk, moderate risk and problem gamblers). Anxiety and depression were significantly higher among severe-problem gamblers than among the other groups. Both significantly predicted problem gambling. On the other hand, there was no difference between groups in emotion regulation (cognitive reappraisal and expressive suppression), which was linked neither to problem gambling nor to anxiety and depression (except for cognitive reappraisal, which was significantly correlated to anxiety). Our results underline the links between anxiety, depression and problem gambling among poker players. If emotion regulation is involved in problem gambling among poker players, as strongly suggested by data from the literature, the emotion regulation strategies we assessed (cognitive reappraisal and expressive suppression) may not be those involved. Further studies are thus needed to investigate the involvement of other emotion regulation strategies.

CYBER COUNSELING ASSISTED WITH FACEBOOK TO REDUCE ONLINE GAME ADDICTION

Directory of Open Access Journals (Sweden)

Hardi Prasetiawan

2016-06-01

Full Text Available Cyber counseling is divided into various shapes, one form is the use of facebook. Guidance and counseling teacher in schools can implement the cyber counseling assited with facebook to reduce online game addiction the students who are more likely to prefer to communicate by text relationship, and students who do not feel comfortable with counseling services by face to face. Problems of children who are addicted Online Games at school require a relief to effort with Group Counseling assited with facebook services for addressing and alleviating the problems experienced, both personal and social through cyber counseling. The positive impact of service delivery cyber counseling assited with facebook is not out of the role from well counselors as providers to service with the active role of students while finding information on social media like Facebook, so socializing continually needs to be implemented further Keyword : Cyber Counseling, Facebook, Online Game Addiction

CYBER COUNSELING ASSISTED WITH FACEBOOK TO REDUCE ONLINE GAME ADDICTION

Directory of Open Access Journals (Sweden)

Hardi Prasetiawan

2016-06-01

Full Text Available Cyber counseling is divided into various shapes, one form is the use of facebook. Guidance and counseling teacher in schools can implement the cyber counseling assited with facebook to reduce online game addiction the students who are more likely to prefer to communicate by text relationship, and students who do not feel comfortable with counseling services by face to face. Problems of children who are addicted Online Games at school require a relief to effort with Group Counseling assited with facebook services for addressing and alleviating the problems experienced, both personal and social through cyber counseling. The positive impact of service delivery cyber counseling assited with facebook is not out of the role from well counselors as providers to service with the active role of students while finding information on social media like Facebook, so socializing continually needs to be implemented furtherKeyword : Cyber Counseling, Facebook, Online Game Addiction

Online Sellers’ Website Quality Influencing Online Buyers’ Purchase Intention

Science.gov (United States)

Shea Lee, Tan; Ariff, Mohd Shoki Md; Zakuan, Norhayati; Sulaiman, Zuraidah; Zameri Mat Saman, Muhamad

2016-05-01

The increase adoption of Internet among young users in Malaysia provides high prospect for online seller. Young users aged between 18 and 25 years old are important to online sellers because they are actively involved in online purchasing and this group of online buyers is expected to dominate future online market. Therefore, examining online sellers’ website quality and online buyers’ purchase intention is crucial. Based on the Theory of planned behavior (TPB), a conceptual model of online sellers’ website quality and purchase intention of online buyers was developed. E-tailQ instrument was adapted in this study which composed of website design, reliability/fulfillment, security, privacy & trust, and customer service. Using online questionnaire and convenience sampling procedure, primary data were obtained from 240 online buyers aged between 18 to 25 years old. It was discovered that website design, website reliability/fulfillment, website security, privacy & trust, and website customer service positively and significantly influence intention of online buyers to continuously purchase via online channels. This study concludes that online sellers’ website quality is important in predicting online buyers’ purchase intention. Recommendation and implication of this study were discussed focusing on how online sellers should improve their website quality to stay competitive in online business.

Game Theoretic Analysis of Road Traffic Problems in Nigeria ...

African Journals Online (AJOL)

Game Theoretic Analysis of Road Traffic Problems in Nigeria. ... problems in Nigeria are analysed in the context of a social dilemma. Game theoretic models based on the famous ... AJOL African Journals Online. HOW TO USE AJOL.

One Method for Inhibiting the Copying of Online Homework

Science.gov (United States)

Busch, Hauke

2017-10-01

Over the last several years online homework solutions have become ever more accessible to students. This is due in part to programs like Yahoo Answers, Chegg, publisher solution manuals, and other web resources that are readily available online. The student can easily search any physics homework problem posted on the web in a matter of seconds and have the solution. The results of this are an apparent increase in students copying the answers without solving the problem, which may lead to an increase in homework scores but a reduction in exam scores and an overall lower grade in the class. A secondary effect that may be observed is that tutoring centers, recitations, and supplemental instructor sessions have reduced student attendance. Some might say that the readily available solutions for homework systems such as MasteringPhysics (MP), WebAssign, etc. have greatly diminished them as a teaching tool, and for grading and assessing students' performance in a course. It is the purpose of this paper to offer a possible solution for preventing students from potentially copying online homework solutions.

Online Feature Selection for Classifying Emphysema in HRCT Images

Directory of Open Access Journals (Sweden)

M. Prasad

2008-06-01

Full Text Available Feature subset selection, applied as a pre- processing step to machine learning, is valuable in dimensionality reduction, eliminating irrelevant data and improving classifier performance. In the classic formulation of the feature selection problem, it is assumed that all the features are available at the beginning. However, in many real world problems, there are scenarios where not all features are present initially and must be integrated as they become available. In such scenarios, online feature selection provides an efficient way to sort through a large space of features. It is in this context that we introduce online feature selection for the classification of emphysema, a smoking related disease that appears as low attenuation regions in High Resolution Computer Tomography (HRCT images. The technique was successfully evaluated on 61 HRCT scans and compared with different online feature selection approaches, including hill climbing, best first search, grafting, and correlation-based feature selection. The results were also compared against ldensity maskr, a standard approach used for emphysema detection in medical image analysis.

Online learning algorithm for ensemble of decision rules

KAUST Repository

Chikalov, Igor; Moshkov, Mikhail; Zielosko, Beata

2011-01-01

We describe an online learning algorithm that builds a system of decision rules for a classification problem. Rules are constructed according to the minimum description length principle by a greedy algorithm or using the dynamic programming approach

Development of an on-line high-temperature ion source for neutron-rich fission products at TRIGA-SPEC

Energy Technology Data Exchange (ETDEWEB)

Renisch, Dennis [Institut fuer Kernchemie, Johannes Gutenberg-Universitaet Mainz (Germany); Collaboration: TRIGA-SPEC-Collaboration

2012-07-01

The TRIGA-SPEC experiment at the TRIGA Mainz research reactor aims to determine ground-state properties of exotic nuclides. It includes the Penning-trap mass spectrometer TRIGA-TRAP and the collinear laser spectroscopy setup TRIGA-LASER. Nuclides of interest are produced in the neutron-induced fission of suitable actinide isotopes, thermalized in a gas-filled volume and transported to an on-line ion source with a gas-jet. The ion source being constructed has two operation modes: a high-temperature surface ionization mode and a hollow cathode plasma mode. It is expected that the surface mode will yield a high ionization efficiency for certain elements, in the order of at least several percent, whereas the plasma mode has the advantage, that more elements can be ionized but with lower efficiency compared to the surface ionization mode. The current status of the TRIGA-SPEC experiments and the present performance of the on-line ion source are presented.

The Role of Online Homework in Low-Enrollment College Introductory Physics Courses

Science.gov (United States)

Lazarova, Krassi

2015-01-01

Studying physics for nonphysics majors at college level is usually a process of learning new problem-solving skills and sometimes seems a frustrating experience. In an attempt to provide students with more learning resources, online homework was required to supplement the instruction. This study reveals the role of the online homework assignments…

Upscaling species richness and abundances in tropical forests.

Science.gov (United States)

Tovo, Anna; Suweis, Samir; Formentin, Marco; Favretti, Marco; Volkov, Igor; Banavar, Jayanth R; Azaele, Sandro; Maritan, Amos

2017-10-01

The quantification of tropical tree biodiversity worldwide remains an open and challenging problem. More than two-fifths of the number of worldwide trees can be found either in tropical or in subtropical forests, but only ≈0.000067% of species identities are known. We introduce an analytical framework that provides robust and accurate estimates of species richness and abundances in biodiversity-rich ecosystems, as confirmed by tests performed on both in silico-generated and real forests. Our analysis shows that the approach outperforms other methods. In particular, we find that upscaling methods based on the log-series species distribution systematically overestimate the number of species and abundances of the rare species. We finally apply our new framework on 15 empirical tropical forest plots and quantify the minimum percentage cover that should be sampled to achieve a given average confidence interval in the upscaled estimate of biodiversity. Our theoretical framework confirms that the forests studied are comprised of a large number of rare or hyper-rare species. This is a signature of critical-like behavior of species-rich ecosystems and can provide a buffer against extinction.

Triglyceride-Rich Lipoproteins and Atherosclerotic Cardiovascular Disease

DEFF Research Database (Denmark)

Nordestgaard, Børge G

2016-01-01

Scientific interest in triglyceride-rich lipoproteins has fluctuated over the past many years, ranging from beliefs that these lipoproteins cause atherosclerotic cardiovascular disease (ASCVD) to being innocent bystanders. Correspondingly, clinical recommendations have fluctuated from a need.......1-fold for myocardial infarction, 3.2-fold for ischemic heart disease, 3.2-fold for ischemic stroke, and 2.2-fold for all-cause mortality. Also, genetic studies using the Mendelian randomization design, an approach that minimizes problems with confounding and reverse causation, now demonstrate...

Online Gambling among Treatment-Seeking Patients in Singapore: A Cross-Sectional Study

Directory of Open Access Journals (Sweden)

Melvyn Zhang

2018-04-01

Full Text Available Given that technology has greatly facilitated easier access to gambling in previous years, it is timely to look in-depth into online gambling activities and behaviors. There have been several studies that examined online gambling. However, most of the current studies to date have focused on determining the prevalence and the epidemiology of problem gambling arising from online gambling in Western cohorts. There remains a paucity of research looking at the problem of online gambling among Asian individuals. The objectives of the current study are to elucidate the characteristics of online gambling among an Asian cohort and to explore the harm associated with online gambling and the potential mechanisms by which harm associated with online gambling could be minimized. It is hoped that the findings of the current paper will bridge the existing gaps in the research literature. A cross-sectional study design was utilized to recruit 100 participants who were attending outpatient services at the National Addictions Management Service (NAMS from March 2014 to October 2015. The majority of the participants were male, of Chinese ethnicity and under the age of 30 years old (48%. Mobile phones and smartphones were the most commonly utilized platforms for gambling online. The median largest ever debt incurred as a result of online gambling ($20,000 was significantly more than that due to offline gambling ($500 (Z = −4.17, p < 0.001. As for the biggest ever loss, participants had incurred a significantly larger median loss from online gambling ($7000 (Z = −2.73, p < 0.01 compared to offline gambling ($2000. A total of 18.4% of participants had waited between 1 to 2 years from their first online gambling experience to seek treatment and 17.3% had waited for more than 10 years. This is perhaps one of the first Asian studies to investigate the serious harm involved in online gambling. The findings from our study are intended to guide further interventions in

Communication Barriers: A Study of Eastern Mediterranean University Students' and Teachers' of Online Program and Courses

Science.gov (United States)

Isman, Aytekin; Altinay, Fahriye

2005-01-01

This research study defines communication barriers in online programs and courses by determining the perceptions of students and teachers at Eastern Mediterranean University. It aims to get the answers to the questions of what sorts of problems students and teachers face while being involved in online courses and online programs. Distance…

A Reliable, Efficient, Affordable and User-friendly Approach for Online Assessment in Distance Education

OpenAIRE

Mardanian, Haleh; Mozelius, Peter

2011-01-01

In the assessment of the students in higher education, cheating and plagiarism have always been of major problem. This problem is also a rapidly growing phenomenon in Sweden. The number of students suspended from courses in tertiary education increased by 56% in 2010 and the plagiarism has been the most common violation. Online distance courses with students spread out geographically need online assessment approaches to save time and avoid travel expenses. E-learning and distance education ha...

The development of indonesian online game addiction questionnaire.

Directory of Open Access Journals (Sweden)

Tjibeng Jap

Full Text Available Online game is an increasingly popular source of entertainment for all ages, with relatively prevalent negative consequences. Addiction is a problem that has received much attention. This research aims to develop a measure of online game addiction for Indonesian children and adolescents. The Indonesian Online Game Addiction Questionnaire draws from earlier theories and research on the internet and game addiction. Its construction is further enriched by including findings from qualitative interviews and field observation to ensure appropriate expression of the items. The measure consists of 7 items with a 5-point Likert Scale. It is validated by testing 1,477 Indonesian junior and senior high school students from several schools in Manado, Medan, Pontianak, and Yogyakarta. The validation evidence is shown by item-total correlation and criterion validity. The Indonesian Online Game Addiction Questionnaire has good item-total correlation (ranging from 0.29 to 0.55 and acceptable reliability (α = 0.73. It is also moderately correlated with the participant's longest time record to play online games (r = 0.39; p<0.01, average days per week in playing online games (ρ = 0.43; p<0.01, average hours per days in playing online games (ρ = 0.41; p<0.01, and monthly expenditure for online games (ρ = 0.30; p<0.01. Furthermore, we created a clinical cut-off estimate by combining criteria and population norm. The clinical cut-off estimate showed that the score of 14 to 21 may indicate mild online game addiction, and the score of 22 and above may indicate online game addiction. Overall, the result shows that Indonesian Online Game Addiction Questionnaire has sufficient psychometric property for research use, as well as limited clinical application.

Finding Question-Answer Pairs from Online Forums

DEFF Research Database (Denmark)

Cong, Gao; Wang, Long; Lin, Chin-Yew

2008-01-01

Online forums contain a huge amount of valuable user generated content. In this paper we address the problem of extracting question-answer pairs from forums. Question-answer pairs extracted from forums can be used to help Question Answering services (e.g. Yahoo! Answers) among other applications...

Nurses' online behaviour: lessons for the nursing profession.

Science.gov (United States)

Green, Janet

2017-06-01

Social networking is popular online activity; however, like many activities on the internet, there are some privacy risks and concerns associated with its use. Recently, an increasing number of nurses have been censured or asked to appear before regulatory or registering authorities for unprofessional behaviour on social media sites. Problem behaviours identified include: inappropriate content and postings, crossing professional boundaries and breaching patient privacy and confidentiality. This discussion paper aims to give the nursing profession an understanding of how their online behaviour can impact on their professionalism, and how they can avoid problematic situations when using social media (Facebook). This exploratory discussion paper will inform a study researching nurses' online behaviour. Social media is here to stay and nurses need to navigate the complexities of the boundaries between the personal and the professional. Nurses need to learn to balance the growing usefulness of social media, with the legalities and etiquette of the online environment.

Collaborative distance learning: Developing an online learning community

Science.gov (United States)

Stoytcheva, Maria

2017-12-01

The method of collaborative distance learning has been applied for years in a number of distance learning courses, but they are relatively few in foreign language learning. The context of this research is a hybrid distance learning of French for specific purposes, delivered through the platform UNIV-RcT (Strasbourg University), which combines collaborative activities for the realization of a common problem-solving task online. The study focuses on a couple of aspects: on-line interactions carried out in small, tutored groups and the process of community building online. By analyzing the learner's perceptions of community and collaborative learning, we have tried to understand the process of building and maintenance of online learning community and to see to what extent the collaborative distance learning contribute to the development of the competence expectations at the end of the course. The analysis of the results allows us to distinguish the advantages and limitations of this type of e-learning and thus evaluate their pertinence.

PENERAPAN CUSTOMER RELATIONSHIP MANAGEMENT (CRM) BERBASIS SMS GATEWAY PADA ONLINE SHOP TOKOFARAH

OpenAIRE

Arfiani Nur Khusna

2016-01-01

SMS applications has become a promising business opportunities in the consumer and industrial markets in the world. One part that can not be separated from the SMS business is the role of an SMS Gateway, a system used by service providers to send and receive SMS automatically. Online shop tokofarah an online web business venture engaged in the production and sales of baby clothes and children. The problems that exist in the online shop tokofarah is the absence of communication between the cus...

Online data quality monitoring system at BES Ⅲ

International Nuclear Information System (INIS)

Sun Xiaodong; Hu Jifeng; Zhao Haisheng; Ji Xiaobin; Wang Yifang; Liu Beijiang; Zheng Yangheng

2012-01-01

The online Data Quality Monitoring (DQM) tool plays an important role in the data recording process of HEP experiments. The BES Ⅲ DQM collects data from the online data flow, reconstructs them with offline reconstruction software and automatically analyzes the reconstructed data with user-defined algorithms. The DQM software is a scalable distributed system. The monitored results are gathered and displayed in various formats, which provides the shifter with current run information that can be used to identify problems quickly. This paper gives an overview of the DQM system at BES Ⅲ. (authors)

On-line scheduling of two-machine open shops where jobs arrive over time

NARCIS (Netherlands)

Chen, B.; Vestjens, A.P.A.; Woeginger, G.J.

1998-01-01

We investigate the problem of on-line scheduling two-machine open shops with the objective of minimizing the makespan.Jobs arrive independently over time, and the existence of a job is not known until its arrival. In the clairvoyant on-line model, the processing requirement of every job becomes

Eye-Tracking Study of Complexity in Gas Law Problems

Science.gov (United States)

Tang, Hui; Pienta, Norbert

2012-01-01

This study, part of a series investigating students' use of online tools to assess problem solving, uses eye-tracking hardware and software to explore the effect of problem difficulty and cognitive processes when students solve gas law word problems. Eye movements are indices of cognition; eye-tracking data typically include the location,…

Implementing an online pharmaceutical service using design science research.

Science.gov (United States)

Lapão, Luís Velez; da Silva, Miguel Mira; Gregório, João

2017-03-27

The rising prevalence of chronic diseases is pressing health systems to introduce reforms. Primary healthcare and multidisciplinary models have been suggested as approaches to deal with this challenge, with new roles for nurses and pharmacists being advocated. More recently, implementing healthcare based on information systems and technologies (e.g. eHealth) has been proposed as a way to improve health services. However, implementing online pharmaceutical services, including their adoption by pharmacists and patients, is still an open research question. In this paper we present ePharmacare, a new online pharmaceutical service implemented using Design Science Research. The Design Science Research Methodology (DSRM) was chosen to implement this online service for chronic diseases management. In the paper, DSRM's different activities are explained, from the definition of the problem to the evaluation of the artifact. During the design and development activities, surveys, observations, focus groups, and eye-tracking glasses were used to validate pharmacists' and patients' requirements. During the demonstration and evaluation activities the new service was used with real-world pharmacists and patients. The results show the contribution of DSRM in the implementation of online services for pharmacies. We found that pharmacists spend only 50% of their time interacting with patients, uncovering a clear opportunity to implement online pharmaceutical care services. On the other hand, patients that regularly visit the same pharmacy recognize the value in patient follow-up demanding to use channels such as the Internet for their pharmacy interactions. Limitations were identified regarding the high workload of pharmacists, but particularly their lack of know-how and experience in dealing with information systems (IST) for the provision of pharmaceutical services. This paper summarizes a research project in which an online pharmaceutical service was proposed, designed, developed

Online learning algorithm for ensemble of decision rules

KAUST Repository

Chikalov, Igor

2011-01-01

We describe an online learning algorithm that builds a system of decision rules for a classification problem. Rules are constructed according to the minimum description length principle by a greedy algorithm or using the dynamic programming approach. © 2011 Springer-Verlag.

Forecasting the Commercial Attractiveness of User-Generated Designs Using Online Data

DEFF Research Database (Denmark)

Jensen, Morten Berg; Hienerth, Christoph; Lettl, Christopher

2014-01-01

workload in the selection phase by predicting which user-generated designs it would most likely perceive as commercially attractive. Prior research emphasizes that among the vast amount of ideas generated in online user communities, it is the lead users’ ideas that tend to stick out in terms of commercial...... attractiveness. Our paper aims to provide the next step by developing a heuristic for filtering commercially attractive ideas that are generated in online user communities. Therefore, prior lead user research is used as a point of reference for our study. This research stream has produced rich insights......-generated designs. We find an inverted U-shaped relationship between the complexity of a user-generated design and its perceived commercial attractiveness. Furthermore, we find a positive relationship between the positive feedback received by a given user-generated design within the peer community and its perceived...

On-Line Booking Policies and Competitive Analysis of Medical Examination in Hospital

Directory of Open Access Journals (Sweden)

Li Luo

2014-01-01

Full Text Available From the on-line point, we consider the hospital’s medical examination appointment problem with hierarchical machines. This approach eliminates the need for both demand forecasts and a risk-neutrality assumption. Due to different unit revenue, uncertain demand, and arrival of patients, we design on-line booking policies for two kinds of different situations from the perspective of on-line policy and competitive analysis. After that, we prove the optimal competitive ratios. Through numerical examples, we compare advantages and disadvantages between on-line policies and traditional policies, finding that there is different superiority for these two policies under different arrival sequences.

Immediate elaborated feedback personalization in online assessment

NARCIS (Netherlands)

Vasilyeva, E.; De Bra, P.M.E.; Pechenizkiy, M.; Dillenbourg, P.; Specht, M.

2008-01-01

Providing a student with feedback that is timely, most suitable and useful for her personality and the performed task is a challenging problem of online assessment within Web-based Learning Systems (WBLSs). In our recent work we suggested a general approach of feedback adaptation in WBLS and through

Extended Subject Access to Hypertext Online Documentation. Part III: The Document-Boundaries Problem.

Science.gov (United States)

Girill, T. R.

1991-01-01

This article continues the description of DFT (Document, Find, Theseus), an online documentation system that provides computer-managed on-demand printing of software manuals as well as the interactive retrieval of reference passages. Document boundaries in the hypertext database are discussed, search vocabulary complexities are described, and text…

E-book about E-learning Online Education and Learning Management Systems-Global E-learning in a Scandinavian Perspective

Directory of Open Access Journals (Sweden)

Ugur DEMIRAY

2004-01-01

Full Text Available Prior to year 2000 Scandinavian universities offered selected online courses attracting a few pioneering students. Today, even primary schools offer online services to students, teachers and parents. Online education is becoming mainstream education in Scandinavia.A new, comprehensive and innovative book about e-learning is now available in print and online in several electronic formats. The book’s web-site presents tidbits of the content in several electronic formats such as text, audio, speech synthesis and video.Dr. Erwin Wagner, former President of the European Distance Education Network, characterizes the book as interesting, important, innovative, international and impressive. In his foreword, Dr. Wagner states that the “book comprises a rich variety of material,perspectives, insights and assessments. Valid information can be found there for researchers, for students in the field, for teachers, for managers and for politicians who are looking forreliable knowledge”

Controlling groundwater pumping online.

Science.gov (United States)

Zekri, Slim

2009-08-01

Groundwater over-pumping is a major problem in several countries around the globe. Since controlling groundwater pumping through water flow meters is hardly feasible, the surrogate is to control electricity usage. This paper presents a framework to restrict groundwater pumping by implementing an annual individual electricity quota without interfering with the electricity pricing policy. The system could be monitored online through prepaid electricity meters. This provides low transaction costs of individual monitoring of users compared to the prohibitive costs of water flow metering and monitoring. The public groundwater managers' intervention is thus required to determine the water and electricity quota and watch the electricity use online. The proposed framework opens the door to the establishment of formal groundwater markets among users at very low transaction costs. A cost-benefit analysis over a 25-year period is used to evaluate the cost of non-action and compare it to the prepaid electricity quota framework in the Batinah coastal area of Oman. Results show that the damage cost to the community, if no active policy is implemented, amounts to (-$288) million. On the other hand, the implementation of a prepaid electricity quota with an online management system would result in a net present benefit of $199 million.

Konseling Online: Sebuah Pendekatan Teknologi Dalam Pelayanan Konseling

Directory of Open Access Journals (Sweden)

Zadrian Ardi

2013-03-01

Full Text Available Technological developments in recent decades have brought a positive impact for human activities. Various applications of technology that grows along with its case bore a lot of ease and problem solving. Counseling as one of efforts to develop an independent human being also requires varied approaches in the performance of its services. One of such approach is counseling online. Various forms and types of service in counseling can be applied by utilizing internet technology, such as Email, Chat Program, Videoconferencing Program dan Webcam. The development of online counseling approach it self in recent years showed significant increases and gets serious attention among professionals. In addition, the application of counseling online also carries a variety of positive impact to the creation of effective-daily-living conditions.

Pengaruh Online Reviews Terhadap Online Hotel Booking Intentions Pada Online Travel Agent Lokal

OpenAIRE

Widya Putra, Surya Aditya; Riorini, Sri Vandayuli

2016-01-01

Perkembangan penggunaan internet yang pesat saat ini, menunjukkan adanya pergesaran teknologi yang semakin maju mengarah ke media berbasis online. Konsumen cenderung untuk menelusuri (surfing) kelengkapan informasi produk dan jasa melalui internet dan melakukan pembelian secara online dikarenakan keterbatasan waktu serta kemudahan yang dirasakan. Penelitian yang dilakukan bertujuan untuk menganalisis pengaruh online reviews beserta dimensi-nya, yaitu: usefullness of online review, reviewer ex...

Problem video game playing is related to emotional distress in adolescents.

Science.gov (United States)

Gonzálvez, María T; Espada, José P; Tejeiro, Ricardo

2017-06-28

Problem use of video games is an increasing risk behaviour. High exposure of adolescents to video games has been linked to a variety of disorders, but the relationship between problem video game playing and emotional welfare is unknown. The aim of the study is to analyse problem video game playing in a sample of adolescents and to determine whether there are differences between online and offline players, in addition to examining its relationship with anxiety and depressive symptomatology. A sample of adolescents (N = 380) completed self-reports measuring video game use and symptoms of anxiety and depression. We found that 7.4% of females and 30% of males can be considered as playing at problem levels. Online players were almost 12 times more likely to play at high frequency than offline players (χ2 (1, 267) = 72.72, p < .001, OR = 11.63, 95% CI [6.31, 21.43]). Males play more frequently, and play more online (χ2 (1, 267) = 50.85, p < .001, OR = 6.74, 95% CI [3.90, 11.64]), with a clear relationship between problem video game playing and anxiety (r = .24; p < .001). In females, there is a relationship between problem video game playing and depression (r = .19; p < .05). Our findings contribute to a better understanding of the psychological variables involved in problem video game playing. The implementation of strategies is suggested in order to prevent pathological gaming and associated problems.

Solving Complex Problems: A Convergent Approach to Cognitive Load Measurement

Science.gov (United States)

Zheng, Robert; Cook, Anne

2012-01-01

The study challenged the current practices in cognitive load measurement involving complex problem solving by manipulating the presence of pictures in multiple rule-based problem-solving situations and examining the cognitive load resulting from both off-line and online measures associated with complex problem solving. Forty-eight participants…

5th Computer Science On-line Conference

CERN Document Server

Senkerik, Roman; Oplatkova, Zuzana; Silhavy, Petr; Prokopova, Zdenka

2016-01-01

This volume is based on the research papers presented in the 5th Computer Science On-line Conference. The volume Artificial Intelligence Perspectives in Intelligent Systems presents modern trends and methods to real-world problems, and in particular, exploratory research that describes novel approaches in the field of artificial intelligence. New algorithms in a variety of fields are also presented. The Computer Science On-line Conference (CSOC 2016) is intended to provide an international forum for discussions on the latest research results in all areas related to Computer Science. The addressed topics are the theoretical aspects and applications of Computer Science, Artificial Intelligences, Cybernetics, Automation Control Theory and Software Engineering.

Learning Online Alignments with Continuous Rewards Policy Gradient

OpenAIRE

Luo, Yuping; Chiu, Chung-Cheng; Jaitly, Navdeep; Sutskever, Ilya

2016-01-01

Sequence-to-sequence models with soft attention had significant success in machine translation, speech recognition, and question answering. Though capable and easy to use, they require that the entirety of the input sequence is available at the beginning of inference, an assumption that is not valid for instantaneous translation and speech recognition. To address this problem, we present a new method for solving sequence-to-sequence problems using hard online alignments instead of soft offlin...

SOCR: Statistics Online Computational Resource

OpenAIRE

Dinov, Ivo D.

2006-01-01

The need for hands-on computer laboratory experience in undergraduate and graduate statistics education has been firmly established in the past decade. As a result a number of attempts have been undertaken to develop novel approaches for problem-driven statistical thinking, data analysis and result interpretation. In this paper we describe an integrated educational web-based framework for: interactive distribution modeling, virtual online probability experimentation, statistical data analysis...

On-line radiation teaching materials using IT technology

International Nuclear Information System (INIS)

Inoue, Hiroyoshi

2005-01-01

We developed the on-line radiation teaching materials using the Internet, in order to provide the teaching support materials of atomic power and radiation educations in on-school study, as well as to create the complementary study system in off-school study. The themes of teaching materials were selected from requests by teachers. In the case of an elementary school, the teaching material 'an environmental problem and atomic power' was created as the aggregate of each content for study without boundary between subjects. The teaching material 'medical treatment and radiation' was created for junior high school students to raise the individual knowledge. In the case of a high school, the teaching material nucleus and radiation' was prepared to supplement the physical study of students. The on-line teaching materials were tried to 300 junior high school and high school students, 68% of students answered that the teaching material is effective to understand atomic power and radiation, though 17% answered they were not effective. Although there are problems to prepare IT learning equipments and learning follow-up system in the material, it is suggested that the on-line teaching materials will provide the novel learning system including debates for the study. This method has no limitation of time and place. (author)

The development of indonesian online game addiction questionnaire.

Science.gov (United States)

Jap, Tjibeng; Tiatri, Sri; Jaya, Edo Sebastian; Suteja, Mekar Sari

2013-01-01

Online game is an increasingly popular source of entertainment for all ages, with relatively prevalent negative consequences. Addiction is a problem that has received much attention. This research aims to develop a measure of online game addiction for Indonesian children and adolescents. The Indonesian Online Game Addiction Questionnaire draws from earlier theories and research on the internet and game addiction. Its construction is further enriched by including findings from qualitative interviews and field observation to ensure appropriate expression of the items. The measure consists of 7 items with a 5-point Likert Scale. It is validated by testing 1,477 Indonesian junior and senior high school students from several schools in Manado, Medan, Pontianak, and Yogyakarta. The validation evidence is shown by item-total correlation and criterion validity. The Indonesian Online Game Addiction Questionnaire has good item-total correlation (ranging from 0.29 to 0.55) and acceptable reliability (α = 0.73). It is also moderately correlated with the participant's longest time record to play online games (r = 0.39; ponline games (ρ = 0.43; ponline games (ρ = 0.41; ponline games (ρ = 0.30; ponline game addiction, and the score of 22 and above may indicate online game addiction. Overall, the result shows that Indonesian Online Game Addiction Questionnaire has sufficient psychometric property for research use, as well as limited clinical application.

Silverlight 4 Problem - Design - Solution

CERN Document Server

Lecrenski, Nick

2010-01-01

A hands-on guide to Microsoft's latest rich application development technology: Silverlight 4. Silverlight 4 is the newest version of the rich Internet application toolkit that provides support for .NET capabilities over the Internet. With this latest release of Silverlight, Microsoft has revolutionized the way that Web applications can be created. This book uses the popular Problem – Design – Solution strategy to demonstrate how to harness the power and abilities of Silverlight 4 to add value to the overall user experience of a Web site. Using a Web site created by the author as a reference p

Crisis interventions in online psychological counseling

Directory of Open Access Journals (Sweden)

Juliana Amaral Medeiros da Silva

2015-12-01

Full Text Available Introduction: The world's population is often assailed by crises of various orders. Disasters caused by nature and by humans themselves also impact on people's mental health. Psychological crises, such as suicide attempts, represent a growing problem in mental health. When faced with such scenarios, specific strategies of crisis intervention are both appropriate and necessary. Objective: To conduct a systematic review of the literature dealing with online psychological crisis intervention, describing and discussing their operational design, specific characteristics and applications. Method: A systematic review of literature indexed on the PubMed, PsycINFO, and SciELO databases identified by searches conducted from January to June of 2014. Results: The searches identified 17 empirical studies about online crisis interventions which were reviewed. Three crisis contexts emerged: 1 disasters, 2 risk/prevention of suicide, and 3 trauma. Eleven different intervention programs were described and the predominant treatment approach was cognitive behavioral therapy. The results showed that research into online psychological crisis intervention has been conducted in several different countries, especially the Netherlands and Australia, and that the users of these tools benefit from them. Conclusion: Online crisis interventions have been developed and researched in many countries around the world. In Brazil, there is still a lack of investment and research in this area.

How scientific experiments are designed: Problem solving in a knowledge-rich, error-rich environment

Science.gov (United States)

Baker, Lisa M.

While theory formation and the relation between theory and data has been investigated in many studies of scientific reasoning, researchers have focused less attention on reasoning about experimental design, even though the experimental design process makes up a large part of real-world scientists' reasoning. The goal of this thesis was to provide a cognitive account of the scientific experimental design process by analyzing experimental design as problem-solving behavior (Newell & Simon, 1972). Three specific issues were addressed: the effect of potential error on experimental design strategies, the role of prior knowledge in experimental design, and the effect of characteristics of the space of alternate hypotheses on alternate hypothesis testing. A two-pronged in vivo/in vitro research methodology was employed, in which transcripts of real-world scientific laboratory meetings were analyzed as well as undergraduate science and non-science majors' design of biology experiments in the psychology laboratory. It was found that scientists use a specific strategy to deal with the possibility of error in experimental findings: they include "known" control conditions in their experimental designs both to determine whether error is occurring and to identify sources of error. The known controls strategy had not been reported in earlier studies with science-like tasks, in which participants' responses to error had consisted of replicating experiments and discounting results. With respect to prior knowledge: scientists and undergraduate students drew on several types of knowledge when designing experiments, including theoretical knowledge, domain-specific knowledge of experimental techniques, and domain-general knowledge of experimental design strategies. Finally, undergraduate science students generated and tested alternates to their favored hypotheses when the space of alternate hypotheses was constrained and searchable. This result may help explain findings of confirmation

Suicidality, psychopathology, and the internet: Online time vs. online behaviors.

Science.gov (United States)

Harris, Keith M; Starcevic, Vladan; Ma, Jing; Zhang, Wei; Aboujaoude, Elias

2017-09-01

This study investigated whether several psychopathology variables, including suicidality, could predict the time people spend using the internet (hours online). Next, we examined a specific at-risk population (suicidal individuals) by their online behaviors, comparing suicidal individuals who went online for suicide-related purposes with suicidal individuals who did not go online for suicide-related purposes. An anonymous online sample of 713 (aged 18-71) reported hours online, psychiatric histories, and completed several standardized scales. After accounting for age and education, hierarchical regression modeling showed that the assessed psychopathology variables, including suicidality, did not explain significant variance in hours online. Hours online were better predicted by younger age, greater willingness to develop online relationships, higher perceived social support, higher curiosity, and lower extraversion. Suicidal participants, who did or did not go online for suicide-related purposes, did not differ on hours online. Multiple regression modeling showed that those who went online for suicide-related purposes were likely to be younger, more suicidal, and more willing to seek help from online mental health professionals. These findings revealed that hours online are not a valid indicator of psychopathology. However, studying online behaviors of specific at-risk groups could be informative and useful, including for suicide prevention efforts. Copyright © 2017. Published by Elsevier B.V.

Problem Video Game Use and Dimensions of Psychopathology

Science.gov (United States)

Starcevic, Vladan; Berle, David; Porter, Guy; Fenech, Pauline

2011-01-01

The objective of this study was to examine associations between problem video game use and psychopathology. The Video Game Use Questionnaire (VGUQ) and the Symptom Checklist 90 (SCL-90) were administered in an international anonymous online survey. The VGUQ was used to identify problem video game users and SCL-90 assessed dimensions of…

Building scientific institution’s brand with online instruments

Directory of Open Access Journals (Sweden)

Barbara Mróz-Gorgoń

2016-03-01

Full Text Available The brand image is fundamental for the scientific institution. In the high- competitive market the brand may have a significant impact on students decisions but also the decisions made by other stakeholders. The usage of online tools in creating brands and the brand awareness is standard nowdays and is present in many business strategies. The aim of the article is to present the problem on the example of scientific institutions. Based on literature review and empirical study the authors described the usage of most popular online tools in creating the scientific institutions’ brands.

Teaching Problem Based Learning as Blended Learning

DEFF Research Database (Denmark)

Kolbæk, Ditte; Nortvig, Anne-Mette

2018-01-01

Problem-based and project organized learning (PBL) was originally developed for collaboration between physically present students, but political decisions at many universities require that collaboration, dialogues, and other PBL activities take place online as well. With a theoretical point...... of departure in Dewey and a methodological point of departure in netnography, this study focuses on an online module at Aalborg University where teaching is based on PBL. With the research question ‘How can teachers design for PBL online,’ this study explores the teacher’s role in a six weeks’ blended learning...... program, and we present suggestions for designs for blended learning PBL based on case studies from two PBL courses...

Web vulnerability study of online pharmacy sites.

Science.gov (United States)

Kuzma, Joanne

2011-01-01

Consumers are increasingly using online pharmacies, but these sites may not provide an adequate level of security with the consumers' personal data. There is a gap in this research addressing the problems of security vulnerabilities in this industry. The objective is to identify the level of web application security vulnerabilities in online pharmacies and the common types of flaws, thus expanding on prior studies. Technical, managerial and legal recommendations on how to mitigate security issues are presented. The proposed four-step method first consists of choosing an online testing tool. The next steps involve choosing a list of 60 online pharmacy sites to test, and then running the software analysis to compile a list of flaws. Finally, an in-depth analysis is performed on the types of web application vulnerabilities. The majority of sites had serious vulnerabilities, with the majority of flaws being cross-site scripting or old versions of software that have not been updated. A method is proposed for the securing of web pharmacy sites, using a multi-phased approach of technical and managerial techniques together with a thorough understanding of national legal requirements for securing systems.

The Impact of an Online Homework Management System on Student Performance and Course Satisfaction in Introductory Financial Accounting

Science.gov (United States)

Fratto, Victoria; Sava, Magda Gabriela; Krivacek, Gregory J.

2016-01-01

Educators in all disciplines are searching for effective educational technologies that help students learn. One technology that has evolved is the online homework management system. The online homework management system permits professors to use the Internet to assign homework problems that students can complete online. Since this system is…

Massively Multiplayer Online Games as a Sandbox for Leadership: The Relationship between in and out of Game Leadership Behaviors

Science.gov (United States)

Mendoza, Sean Henry Veloria

2014-01-01

Given society's increasingly technology centric play and workplace environment, Massively Multiplayer Online Games (MMOs) can be an excellent sandbox to develop future leaders of teams, which are the lifeblood of any organization. MMOs like World of WarCraft provide rich immersive experiences that allow leaders and followers the ability to create…

Time dependent optimal switching controls in online selling models

Energy Technology Data Exchange (ETDEWEB)

Bradonjic, Milan [Los Alamos National Laboratory; Cohen, Albert [MICHIGAN STATE UNIV

2010-01-01

We present a method to incorporate dishonesty in online selling via a stochastic optimal control problem. In our framework, the seller wishes to maximize her average wealth level W at a fixed time T of her choosing. The corresponding Hamilton-Jacobi-Bellmann (HJB) equation is analyzed for a basic case. For more general models, the admissible control set is restricted to a jump process that switches between extreme values. We propose a new approach, where the optimal control problem is reduced to a multivariable optimization problem.

Instructional Strategies for Online Introductory College Physics Based on Learning Styles

Science.gov (United States)

Ekwue, Eleazer U.

2013-01-01

The practical nature of physics and its reliance on mathematical presentations and problem solving pose a challenge toward presentation of the course in an online environment for effective learning experience. Most first-time introductory college physics students fail to grasp the basic concepts of the course and the problem solving skills if the…

REVIEW: The Economics Of E-Learning [Online Monograph]
Augmented Reality The Horizon Of Virtual And Augmented Reality: 
The Reality Of The Global Digital Age

OpenAIRE

OZARSLAN, Reviewed By Yasin

2015-01-01

Online and distance education institutions need a communication that should differentiate and separate them from the other counterparts not only in their own category but also in the category of traditional educational institutions. That kind of communication is one of the tools of integrated marketing communication. In this book, authors discuss marketing issue related with distance and online learning concept under the integrated marketing communication perspective. It gives very rich conte...

REVIEW: The Economics Of E-Learning [Online Monograph]
Augmented Reality The Horizon Of Virtual And Augmented Reality: 
The Reality Of The Global Digital Age

OpenAIRE

OZARSLAN, Reviewed By Yasin

2011-01-01

Online and distance education institutions need a communication that should differentiate and separate them from the other counterparts not only in their own category but also in the category of traditional educational institutions. That kind of communication is one of the tools of integrated marketing communication. In this book, authors discuss marketing issue related with distance and online learning concept under the integrated marketing communication perspective. It gives very rich conte...

New Dimensions for the Online Catalog: The Dartmouth College Library Experience [and] TOC/DOC at Caltech: Evolution of Citation Access Online [and] Locally Loaded Databases in Arizona State University's Online Catalog Using the CARL System.

Science.gov (United States)

Klemperer, Katharina; And Others

1989-01-01

Each of three articles describes an academic library's online catalog that includes locally created databases. Topics covered include database and software selection; systems design and development; database producer negotiations; problems encountered during implementation; database loading; training and documentation; and future plans. (CLB)

Tracking Multiple People Online and in Real Time

Science.gov (United States)

2015-12-21

NO. 0704-0188 3. DATES COVERED (From - To) - UU UU UU UU 21-12-2015 Approved for public release; distribution is unlimited. Tracking multiple people ...online and in real time We cast the problem of tracking several people as a graph partitioning problem that takes the form of an NP-hard binary...PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. Duke University 2200 West Main Street Suite 710 Durham, NC 27705 -4010 ABSTRACT Tracking multiple

Sequential Change-Point Detection via Online Convex Optimization

Directory of Open Access Journals (Sweden)

Yang Cao

2018-02-01

Full Text Available Sequential change-point detection when the distribution parameters are unknown is a fundamental problem in statistics and machine learning. When the post-change parameters are unknown, we consider a set of detection procedures based on sequential likelihood ratios with non-anticipating estimators constructed using online convex optimization algorithms such as online mirror descent, which provides a more versatile approach to tackling complex situations where recursive maximum likelihood estimators cannot be found. When the underlying distributions belong to a exponential family and the estimators satisfy the logarithm regret property, we show that this approach is nearly second-order asymptotically optimal. This means that the upper bound for the false alarm rate of the algorithm (measured by the average-run-length meets the lower bound asymptotically up to a log-log factor when the threshold tends to infinity. Our proof is achieved by making a connection between sequential change-point and online convex optimization and leveraging the logarithmic regret bound property of online mirror descent algorithm. Numerical and real data examples validate our theory.

Online Classrooms: Powerful Tools for Rapid-Iteration Pedagogical Improvements

Science.gov (United States)

Horodyskyj, L.; Semken, S.; Anbar, A.; Buxner, S.

2015-11-01

Online education offers the opportunity to reach a variety of students including non-traditional and geographically diverse students. Research has shown that online courses modeled after traditional lecture-exam courses are ineffective. Over the past three years, Arizona State University developed and offered Habitable Worlds, an online-only astrobiology lab course featuring active learning tools. The course is offered in an intelligent tutoring system (ITS) that records a wealth of student data. In analyzing data from the Fall 2013 offering of the course, we were able to identify pre-post quiz results that were suboptimal and where in the lesson and how precisely students were missing concepts. The problem areas were redesigned, and the improved lessons were deployed a few months later. We saw significant improvements in our pre-post quiz results due to the implemented changes. This demonstrates the effectiveness of using robust ITS not only to present content online, but to provide instantaneous data for rapid iteration and improvement of existing content.

Monitoring of absolute mirror alignment at COMPASS RICH-1 detector

Energy Technology Data Exchange (ETDEWEB)

Alexeev, M. [INFN, Sezione di Torino and University of East Piemonte, Alessandria (Italy); INFN, Sezione di Trieste and University of Bari, Bari (Italy); Birsa, R. [INFN, Sezione di Trieste, Trieste (Italy); Bradamante, F.; Bressan, A. [INFN, Sezione di Trieste and University of Trieste, Trieste (Italy); Chiosso, M. [INFN, Sezione di Torino and University of Torino, Torino (Italy); Ciliberti, P. [INFN, Sezione di Trieste and University of Trieste, Trieste (Italy); Dalla Torre, S. [INFN, Sezione di Trieste, Trieste (Italy); Denisov, O. [INFN, Sezione di Torino, Torino (Italy); Duic, V. [INFN, Sezione di Trieste and University of Trieste, Trieste (Italy); Ferrero, A. [INFN, Sezione di Torino and University of Torino, Torino (Italy); Finger, M.; Finger, M. [Charles University, Prague (Czech Republic); JINR, Dubna (Russian Federation); Gayde, J.Ch. [CERN, European Organization for Nuclear Research, Geneva (Switzerland); Giorgi, M. [INFN, Sezione di Trieste and University of Trieste, Trieste (Italy); Gobbo, B.; Levorato, S. [INFN, Sezione di Trieste, Trieste (Italy); Maggiora, A. [INFN, Sezione di Torino, Torino (Italy); Martin, A. [INFN, Sezione di Trieste and University of Trieste, Trieste (Italy); Menon, G. [INFN, Sezione di Trieste, Trieste (Italy); Panzieri, D. [INFN, Sezione di Torino and University of East Piemonte, Alessandria (Italy); and others

2014-12-01

The gaseous COMPASS RICH-1 detector uses two spherical mirror surfaces, segmented into 116 individual mirrors, to focus the Cherenkov photons onto the detector plane. Any mirror misalignment directly affects the detector resolution. The on-line Continuous Line Alignment and Monitoring (CLAM) photogrammetry-based method has been implemented to measure the alignment of individual mirrors which can be characterized by the center of curvature. The mirror wall reflects a regular grid of retroreflective strips placed inside the detector vessel. Then, the position of each mirror is determined from the image of the grid reflection. The images are collected by four cameras. Any small mirror misalignment results in changes of the grid lines’ positions in the image. The accuracy limits of the CLAM method were checked by laser interferometry and are below 0.1 mrad.

Benchmarking online dispatch algorithms for Emergency Medical Services

NARCIS (Netherlands)

Jagtenberg, C.J.; Berg, P.L.; van der Mei, R.D.

2016-01-01

Providers of Emergency Medical Services (EMS) face the online ambulance dispatch problem, in which they decide which ambulance to send to an incoming incident. Their objective is to minimize the fraction of arrivals later than a target time. Today, the gap between existing solutions and the optimum

Tag-Driven Online Novel Recommendation with Collaborative Item Modeling

Directory of Open Access Journals (Sweden)

Fenghuan Li

2018-04-01

Full Text Available Online novel recommendation recommends attractive novels according to the preferences and characteristics of users or novels and is increasingly touted as an indispensable service of many online stores and websites. The interests of the majority of users remain stable over a certain period. However, there are broad categories in the initial recommendation list achieved by collaborative filtering (CF. That is to say, it is very possible that there are many inappropriately recommended novels. Meanwhile, most algorithms assume that users can provide an explicit preference. However, this assumption does not always hold, especially in online novel reading. To solve these issues, a tag-driven algorithm with collaborative item modeling (TDCIM is proposed for online novel recommendation. Online novel reading is different from traditional book marketing and lacks preference rating. In addition, collaborative filtering frequently suffers from the Matthew effect, leading to ignored personalized recommendations and serious long tail problems. Therefore, item-based CF is improved by latent preference rating with a punishment mechanism based on novel popularity. Consequently, a tag-driven algorithm is constructed by means of collaborative item modeling and tag extension. Experimental results show that online novel recommendation is improved greatly by a tag-driven algorithm with collaborative item modeling.

Plan for Demonstration of Online Monitoring for the Light Water Reactor Sustainability Online Monitoring Project

Energy Technology Data Exchange (ETDEWEB)

Magdy S. Tawfik; Vivek Agarwal; Nancy J. Lybeck

2011-09-01

Condition based online monitoring technologies and development of diagnostic and prognostic methodologies have drawn tremendous interest in the nuclear industry. It has become important to identify and resolve problems with structures, systems, and components (SSCs) to ensure plant safety, efficiency, and immunity to accidents in the aging fleet of reactors. The Machine Condition Monitoring (MCM) test bed at INL will be used to demonstrate the effectiveness to advancement in online monitoring, sensors, diagnostic and prognostic technologies on a pilot-scale plant that mimics the hydraulics of a nuclear plant. As part of this research project, INL will research available prognostics architectures and their suitability for deployment in a nuclear power plant. In addition, INL will provide recommendation to improve the existing diagnostic and prognostic architectures based on the experimental analysis performed on the MCM test bed.

The Washington Academy of Biomedical Engineering (WABME) Quarterly Workshops: Clinical Problems and Engineering Solutions

National Research Council Canada - National Science Library

Wong, Kenneth

2005-01-01

... University and Howard University. A prime component of WABME activities is a quarterly series of research workshops, which bring together problem-rich biomedical disciplines and solution-rich engineering and scientific disciplines...

ESSEA On-Line Courses and the WestEd Eisenhower Regional Consortium (WERC)

Science.gov (United States)

Rognier, E.

2001-12-01

The WestEd Eisenhower Regional Consortium (WERC) is in its second year of offering two Earth Systems Science On-line Graduate courses from IGES - one for High School teachers, and one for Middle School teachers. These high-quality courses support WERC's commitment to "supporting increased scientific and mathematical literacy among our nation's youth through services and other support aimed at enhancing the efforts of those who provide K-12 science and mathematics education." WERC has been able to use its EdGateway online community network to offer these courses to environmental education and science teachers nationwide. Through partnerships with the North American Association for Environmental Education (NAAEE), the National Environmental Education Advancement Project (NEEAP), and other regional, state and local science and environmental education organizations, WERC has a broad reach in connecting with science educators nationwide. WERC manages several state and national listservs, which enable us to reach thousands of educators with information about the courses. EdGateway also provides a private online community in which we offer the courses. WERC partners with two Master Teachers from Utah, who facilitate the courses, and with the Center for Science and Mathematics Education at Weber State University, who provides low-cost graduate credit for the courses. Our students have included classroom teachers from upper elementary through high school, community college science teachers, and environmental science center staff who provide inservice for teachers. Educators from Hawaii to New Jersey have provided diverse personal experiences of Earth Systems Science events, and add richness to the online discussions. Two Earth Science Experts, Dr. Rick Ford from Weber State University, and Dr. Art Sussman from WestEd also contribute to the high caliber of learning the students experience in the courses. (Dr. Sussman's book, Dr. Art's Guide to Planet Earth, is used as one of

User Participation and Honesty in Online Rating Systems: What a Social Network Can Do

OpenAIRE

Davoust, Alan; Esfandiari, Babak

2016-01-01

An important problem with online communities in general, and online rating systems in particular, is uncooperative behavior: lack of user participation, dishonest contributions. This may be due to an incentive structure akin to a Prisoners' Dilemma (PD). We show that introducing an explicit social network to PD games fosters cooperative behavior, and use this insight to design a new aggregation technique for online rating systems. Using a dataset of ratings from Yelp, we show that our aggrega...

Instructional strategies for online introductory college physics based on learning styles

Science.gov (United States)

Ekwue, Eleazer U.

The practical nature of physics and its reliance on mathematical presentations and problem solving pose a challenge toward presentation of the course in an online environment for effective learning experience. Most first-time introductory college physics students fail to grasp the basic concepts of the course and the problem solving skills if the instructional strategy used to deliver the course is not compatible with the learners' preferred learning styles. This study investigates the effect of four instructional strategies based on four learning styles (listening, reading, iconic, and direct-experience) to improve learning for introductory college physics in an online environment. Learning styles of 146 participants were determined with Canfield Learning Style inventory. Of the 85 learners who completed the study, research results showed a statistically significant increase in learning performance following the online instruction in all four learning style groups. No statistically significant differences in learning were found among the four groups. However, greater significant academic improvement was found among learners with iconic and direct-experience modes of learning. Learners in all four groups expressed that the design of the unit presentation to match their individual learning styles contributed most to their learning experience. They were satisfied with learning a new physics concept online that, in their opinion, is either comparable or better than an instructor-led classroom experience. Findings from this study suggest that learners' performance and satisfaction in an online introductory physics course could be improved by using instructional designs that are tailored to learners' preferred ways of learning. It could contribute toward the challenge of providing viable online physics instruction in colleges and universities.

PEMANFAATAN JEJARING FACEBOOK DALAM PEER ASSESSMENT ONLINE UNTUK MENILAI SIKAP ILMIAH SISWA

Directory of Open Access Journals (Sweden)

Peny Husna Handayani

2016-06-01

Full Text Available The aim of this research is to describe facebook utilization in peer assessment online to assess pupil’s scientific attitude on laboratory report of environment pollution, to explain the benefit and the weakness, and also to get information about student’s and teacher’s response about peer assessment online by facebook. Collecting data are done by observation, questionnaire, interview, and documentation. The instruments which used were analysis form of implementation facebook utilization in peer assessment online, rubrict peer assessment to assess pupil’s scientific attitude, questionnaire, and manual teacher interview. The result show that many of pupil’s scientific attitude can be assessed by peer assessment online with utilization of facebook. The main weakness of facebook utilization in peer assessment online are technical problem such as unfluent internet network and a hacker. Benefits are free of time, low cost relatively, and comfortable in assess. The conclusion of this research is facebook can be used for peer assessment online to assess pupil’s scientific attitude.

The association between online gaming, social phobia, and depression: an internet survey

Directory of Open Access Journals (Sweden)

Wei Han-Ting

2012-07-01

Full Text Available Abstract Background Online gaming technology has developed rapidly within the past decade, and its related problems have received increasing attention. However, there are few studies on the psychiatric symptoms associated with excessive use of online games. The aim of this study is to investigate the characteristics of online gamers, and the association between online gaming hours, social phobia, and depression using an internet survey. Methods An online questionnaire was designed and posted on a popular online game websites, inviting the online gamers to participate the survey. The content of the questionnaire included demographic data, profiles of internet usage and online gaming, and self-rating scales of Depression and Somatic Symptoms Scale (DSSS, Social Phobia Inventory (SPIN, and Chen Internet Addiction Scale (CIAS. Results A total of 722 online gamers with a mean age of 21.8 ± 4.9 years completed the online survey within one month. 601 (83.2% participants were male, and 121 (16.8% were female. The mean weekly online gaming time was 28.2 ± 19.7 hours, which positively associated with history of online gaming (r = 0.245, p  Conclusion The online gamers with longer weekly gaming hours tended to have a longer history of online gaming, and more severe depressive, social phobic, and internet addiction symptoms. Female online gamers had fewer weekly online gaming hours and a shorter previous online gaming history, but tended to have more severe somatic, pain, and social phobic symptoms. The predictors for depression were higher social phobic symptom, higher internet addiction symptoms, longer online gaming hours, and female gender.

Exploring Consumers’ Propensity for Online Shopping in a Developing Country: A Demographic Perspective

Directory of Open Access Journals (Sweden)

Kwarteng Michael Adu

2016-06-01

Full Text Available The advent of the Internet continues to open new frontiers in digital marketing. One visible impact of the Internet in marketing has been the growing increase in online transactions which profits marketers and seemingly satisfies customers. However, in developing countries, the potential of online shopping has not been fully explored, and in some cases, are just non-existent. Lack of online infrastructure has often been attributed to the slower growth in online transactions in Africa, however, the customers’ preparedness and inclination to use the service is ignored. .Against this backdrop, this study seeks to analyze consumers’ propensity to engage in online transactions with a focus on demographic attributes such as age, gender and education. Using customers in Ghana as a case study, key reasons as well as the demographics that fancy online transactions are revealed. The results indicate that delivery problems, poor internet connection, privacy and security issues are some of the reasons preventing customers to shop online

Analysis of context dependence in social interaction networks of a massively multiplayer online role-playing game.

Science.gov (United States)

Son, Seokshin; Kang, Ah Reum; Kim, Hyun-chul; Kwon, Taekyoung; Park, Juyong; Kim, Huy Kang

2012-01-01

Rapid advances in modern computing and information technology have enabled millions of people to interact online via various social network and gaming services. The widespread adoption of such online services have made possible analysis of large-scale archival data containing detailed human interactions, presenting a very promising opportunity to understand the rich and complex human behavior. In collaboration with a leading global provider of Massively Multiplayer Online Role-Playing Games (MMORPGs), here we present a network science-based analysis of the interplay between distinct types of user interaction networks in the virtual world. We find that their properties depend critically on the nature of the context-interdependence of the interactions, highlighting the complex and multilayered nature of human interactions, a robust understanding of which we believe may prove instrumental in the designing of more realistic future virtual arenas as well as provide novel insights to the science of collective human behavior.

Developing Online Marketing in Social Media for DORTMUNDtourismus e.V.

OpenAIRE

Steinrücken, Thomas

2010-01-01

The thesis discussed the topic of online marketing in social media. The focus was set on the social media platforms Facebook, YouTube and Flickr. Commissioner of the thesis was DORTMUNDtourismus e.V., the destination management organization for Dortmund, Germany. The research problem was to identify ways to develop online marketing in social media in a cost-efficient and innovative way in order to raise the awareness of DORTMUNDtourismus e.V. and Dortmund in social media and as a destination....

CYBER COUNSELING ASSISTED WITH FACEBOOK TO REDUCE ONLINE GAME ADDICTION

OpenAIRE

Hardi Prasetiawan; Hardi Prasetiawan

2016-01-01

Cyber counseling is divided into various shapes, one form is the use of facebook. Guidance and counseling teacher in schools can implement the cyber counseling assited with facebook to reduce online game addiction the students who are more likely to prefer to communicate by text relationship, and students who do not feel comfortable with counseling services by face to face. Problems of children who are addicted Online Games at school require a relief to effort with Group Counseling assited wi...

The leucine-rich repeat structure.

Science.gov (United States)

Bella, J; Hindle, K L; McEwan, P A; Lovell, S C

2008-08-01

The leucine-rich repeat is a widespread structural motif of 20-30 amino acids with a characteristic repetitive sequence pattern rich in leucines. Leucine-rich repeat domains are built from tandems of two or more repeats and form curved solenoid structures that are particularly suitable for protein-protein interactions. Thousands of protein sequences containing leucine-rich repeats have been identified by automatic annotation methods. Three-dimensional structures of leucine-rich repeat domains determined to date reveal a degree of structural variability that translates into the considerable functional versatility of this protein superfamily. As the essential structural principles become well established, the leucine-rich repeat architecture is emerging as an attractive framework for structural prediction and protein engineering. This review presents an update of the current understanding of leucine-rich repeat structure at the primary, secondary, tertiary and quaternary levels and discusses specific examples from recently determined three-dimensional structures.

Navigating Turn-Taking and Conversational Repair in an Online Synchronous Course

Science.gov (United States)

Earnshaw, Yvonne

2017-01-01

In face-to-face conversations, speaker transitions (or hand-offs) are typically seamless. In computer-mediated communication settings, speaker hand-offs can be a bit more challenging. This paper presents the results of a study of audio communication problems that occur in an online synchronous course, and how, and by whom, those problems are…

Mutual support and recovery in the Russian Alcoholics Anonymous online community

Directory of Open Access Journals (Sweden)

Lyytikäinen Laura

2016-04-01

Full Text Available AIMS – In Russia the paradigm of alcoholism as a disease is still in contrast to the general perception of alcoholics as weak-willed. This article studies alcoholism and recovery in Russia through the case study of the Russian Alcoholics Anonymous online group. It studies how people who are seeking help for their drinking problems in this online community come to incorporate a new self-understanding of being ill with alcoholism.

INTEGRATING VISUALIZATION AND MULTI-ATTRIBUTE UTILITY THEORY FOR ONLINE PRODUCT SELECTION

OpenAIRE

CHUREE THEETRANONT; PETER HADDAWY; DONYAPRUETH KRAIRIT

2007-01-01

Effectively selling products online is a challenging task. Today's product domains often contain a dizzying variety of brands and models with highly complex sets of characteristics. This paper addresses the problem of supporting product search and selection in domains containing large numbers of alternatives with complex sets of features. A number of online shopping websites provide product choice assistance by making direct use of Multi-Attribute Utility Theory (MAUT). While the MAUT approac...

Review of online coupling of sample preparation techniques with liquid chromatography.

Science.gov (United States)

Pan, Jialiang; Zhang, Chengjiang; Zhang, Zhuomin; Li, Gongke

2014-03-07

Sample preparation is still considered as the bottleneck of the whole analytical procedure, and efforts has been conducted towards the automation, improvement of sensitivity and accuracy, and low comsuption of organic solvents. Development of online sample preparation techniques (SP) coupled with liquid chromatography (LC) is a promising way to achieve these goals, which has attracted great attention. This article reviews the recent advances on the online SP-LC techniques. Various online SP techniques have been described and summarized, including solid-phase-based extraction, liquid-phase-based extraction assisted with membrane, microwave assisted extraction, ultrasonic assisted extraction, accelerated solvent extraction and supercritical fluids extraction. Specially, the coupling approaches of online SP-LC systems and the corresponding interfaces have been discussed and reviewed in detail, such as online injector, autosampler combined with transport unit, desorption chamber and column switching. Typical applications of the online SP-LC techniques have been summarized. Then the problems and expected trends in this field are attempted to be discussed and proposed in order to encourage the further development of online SP-LC techniques. Copyright © 2014 Elsevier B.V. All rights reserved.

The CAPRICE RICH detector

Energy Technology Data Exchange (ETDEWEB)

Basini, G. [INFN, Laboratori Nazionali di Frascati, Rome (Italy); Codino, A.; Grimani, C. [Perugia Univ. (Italy)]|[INFN, Perugia (Italy); De Pascale, M.P. [Rome Univ. `Tor Vergata` (Italy). Dip. di Fisica]|[INFN, Sezione Univ. `Tor Vergata` Rome (Italy); Cafagna, F. [Bari Univ. (Italy)]|[INFN, Bari (Italy); Golden, R.L. [New Mexico State Univ., Las Cruces, NM (United States). Particle Astrophysics Lab.; Brancaccio, F.; Bocciolini, M. [Florence Univ. (Italy)]|[INFN, Florence (Italy); Barbiellini, G.; Boezio, M. [Trieste Univ. (Italy)]|[INFN, Trieste (Italy)

1995-09-01

A compact RICH detector has been developed and used for particle identification in a balloon borne spectrometer to measure the flux of antimatter in the cosmic radiation. This is the first RICH detector ever used in space experiments that is capable of detecting unit charged particles, such as antiprotons. The RICH and all other detectors performed well during the 27 hours long flight.

Residual-driven online generalized multiscale finite element methods

KAUST Repository

Chung, Eric T.

2015-09-08

The construction of local reduced-order models via multiscale basis functions has been an area of active research. In this paper, we propose online multiscale basis functions which are constructed using the offline space and the current residual. Online multiscale basis functions are constructed adaptively in some selected regions based on our error indicators. We derive an error estimator which shows that one needs to have an offline space with certain properties to guarantee that additional online multiscale basis function will decrease the error. This error decrease is independent of physical parameters, such as the contrast and multiple scales in the problem. The offline spaces are constructed using Generalized Multiscale Finite Element Methods (GMsFEM). We show that if one chooses a sufficient number of offline basis functions, one can guarantee that additional online multiscale basis functions will reduce the error independent of contrast. We note that the construction of online basis functions is motivated by the fact that the offline space construction does not take into account distant effects. Using the residual information, we can incorporate the distant information provided the offline approximation satisfies certain properties. In the paper, theoretical and numerical results are presented. Our numerical results show that if the offline space is sufficiently large (in terms of the dimension) such that the coarse space contains all multiscale spectral basis functions that correspond to small eigenvalues, then the error reduction by adding online multiscale basis function is independent of the contrast. We discuss various ways computing online multiscale basis functions which include a use of small dimensional offline spaces.

Are embedded online communities of practice more successful than exclusively virtual ones?

NARCIS (Netherlands)

Matzat, U.

2008-01-01

Is a deliberate shaping of the mixture of virtual and 'real-life' interaction in online communities a crucial condition for diminishing typical problems of knowledge sharing? Typical problems that increase the risk of failure are: 1. a lack of trust between members, 2. free rider behavior, and 3. a

CUSTOMER PERCEPTION ON ONLINE PURCHASE INTENTION: THE IMPACT OF ONLINE SHOPPING ORIENTATIONS ON ONLINE BUYING INTENTION

OpenAIRE

Ghouri, Arsalan Mujahid; Ul Haq, Mirza Amin; Khan, Naveed R

2017-01-01

This paper endeavorsto recognize the customer perception on online purchase intention among theyouth of Pakistan. Customer perception on online purchase intention, thus ourresearch variables are impulse purchase orientation, brand orientation,and quality orientation were considered along with online trust andprior online purchase experience. The results are focused 292 responses gotfrom the online study. The exploration made that impulse purchase orientation;prior o...

Design and Implementation of Online Booking System of University Sports Venues

Directory of Open Access Journals (Sweden)

Li Can

2017-01-01

Full Text Available To solve the imbalanced use of university sports venues, the online booking system of university sports venues based on the table tennis hall of Zhengzhou University is designed, combining the experience of the existing online booking systems, the main methods and the major ideal of building these systems both at home and aboard. The basic functions of the system are designed according to the general requirement analysis, including user’s registration and login, online venue booking, online payment, personal center, message board and database construction. The development of the system used Java programming language, JSP (a Web platform development technology, MySQL database processing technology, JDBC data access model, MyEclipse development platform and Tomcat server. The system has accomplished such functions as online booking, online payment and online message. The tests of the system are run in good conditions. The use of the system has made up for the current luck of sports venues management, solved the problems of the online booking function of university sports venues, improved the efficiency of the venues and meet the needs of efficient use of the venues. The system can be an experience of the management of the other college sports venues.

Unwanted online sexual solicitation and online sexual risk behavior

NARCIS (Netherlands)

Baumgartner, S.E.; Valkenburg, P.M.; Peter, J.; Yan, Z.

2012-01-01

In recent years, there have been growing concerns about online sexual solicitations and online sexual risk behaviors. Recent studies suggest that only a minority of adolescents is confronted with online sexual solicitations or engages in online sexual risk behavior. Whereas more girls encounter

ODI launches RAPID Outcome Mapping Approach online guide ...

International Development Research Centre (IDRC) Digital Library (Canada)

17 juin 2014 ... The UK-based Overseas Development Institute has released its online guide to understanding, engaging with, and influencing policy. ROMA: A guide to policy engagement and influence contains a suite of tools that can be used to unpack complex problems, analyze stakeholder influence, and understand ...

The Automated Threaded Fastening Based on On-line Identification

Directory of Open Access Journals (Sweden)

Nicolas Ivan Giannoccaro

2008-11-01

Full Text Available The principle of the thread fastenings have been known and used for decades with the purpose of joining one component to another. Threaded fastenings are popular because they permit easy disassembly for maintenance, repair, relocation and recycling. Screw insertions are typically carried out manually. It is a difficult problem to automat. As a result there is very little published research on automating threaded fastenings, and most research on automated assembly focus on the peg-in-hole assembly problem. This paper investigates the problem of automated monitoring of the screw insertion process. The monitoring problem deals with predicting integrity of a threaded insertion, based on the torque vs. insertion depth curve generated during the insertions. The authors have developed an analytical model to predict the torque signature signals during self-tapping screw insertions. However, the model requires parameters on the screw dimensions and plate material properties are difficult to measure. This paper presents a study on on-line identification during screw fastenings. An identification methodology for two unknown parameter estimation during a self-tapping screw insertion process is presented. It is shown that friction and screw properties required by the model can be reliably estimated on-line. Experimental results are presented to validate the identification procedure.

Does online harassment constitute bullying? An exploration of online harassment by known peers and online-only contacts.

Science.gov (United States)

Wolak, Janis; Mitchell, Kimberly J; Finkelhor, David

2007-12-01

To shed light on the nature of online harassment and the extent to which it may be bullying by examining differences in the characteristics of harassed youth, online harassment incidents, and distressing online harassment based on the identity of online harassers (known peer vs. online-only contact). A telephone survey of a nationally representative sample of 1500 youth Internet users, ages 10 to 17, conducted between March and June 2005. Nine percent (n = 129) of youth were harassed online in the past year, 43% (n = 56) by known peers and 57% (n = 73) by people they met online and did not know in person (online-only contacts). Most online harassment incidents did not appear to meet the standard definition of bullying used in school-based research and requiring aggression, repetition, and power imbalance. Only 25% of incidents by known peers and 21% by online-only contacts involved both repeated incidents and either distress to targets or adult intervention. In many cases, the concept of "bullying" or "cyber-bullying" may be inappropriate for online interpersonal offenses. We suggest using "online harassment," with disclaimers that it does not constitute bullying unless it is part of or related to offline bullying. This would include incidents perpetrated by peers that occur entirely online, but arise from school-related events or relationships and have school-related consequences for targets. The Internet provides opportunities for the extension of conventional school bullying to new venues. Those who study conventional school bullying should include online forms of the behavior in research, prevention, and intervention paradigms.

Effect of carbo-nitride-rich and oxide-rich inclusions on the pitting susceptibility of depleted uranium

International Nuclear Information System (INIS)

Pu, Zhen; Chen, Xianglin; Meng, Xiandong; Wu, Yanping; Shen, Liang; Wang, Qingfu; Liu, Tianwei; Shuai, Maobing

2017-01-01

Highlights: •The Volta potential differences relative to the matrix are positive for both types of inclusions. •Both types of inclusions are cathodic in the “inclusion/matrix” microgalvanic couples. •The oxide-rich inclusions show a larger Volta potential value of about 115 mV than the carbo-nitride-rich inclusions. •The oxide-rich inclusions give stronger local galvanic coupling with the matrix. •The oxide-rich inclusions are more predisposed to initiate pitting corrosion. -- Abstract: The effects of carbo-nitride-rich and oxide-rich inclusions on the pitting susceptibility of depleted uranium were investigated by electrochemical corrosion measurements, optical microscopy, scanning Kelvin probe force microscopy (SKPFM), and SEM. The results of the potentiodynamic polarization tests suggest that oxide-rich inclusions are more likely to induce pitting corrosion than carbo-nitride-rich inclusions. This enhanced corrosion may be explained by the strong local galvanic coupling between the oxide-rich inclusion and the surrounding matrix, which, from the sight of SKPFM analysis, exhibits a 115 V higher Volta potential than the coupling between the carbo-nitride-rich inclusions and the matrix, respectively.

UPAYA MEREDUKSI KECANDUAN GAME ONLINE MELALUI LAYANAN KONSELING KELOMPOK

Directory of Open Access Journals (Sweden)

Hardi Prasetiawan

2016-09-01

Full Text Available This research is Classroom Action Research aims to reduce online gaming addictionthrough group counseling services. The methods used are questionnaires andobservation of the number of subjects studied were 10 students in two cycles , each cycleconsisting of three acts. Started from awarding the behavior contract as a form of writtenagreements for students to be responsible for the activities of group counseling and theprovision of a worksheet each after the counseling given as excavation problems andknowledge of students. The results showed that group counseling services through onlinegaming addiction in students can be reduced. It knowed before given the action thestudent is in the category of online game addiction as high as 10 people, after being givencounseling services group of 3 students in middle category and 7 low category.Keywords: Online Game Addiction, Group Counseling.

Automation of Presentation Record Production Based on Rich-Media Technology Using SNT Petri Nets Theory

Directory of Open Access Journals (Sweden)

Ivo Martiník

2015-01-01

Full Text Available Rich-media describes a broad range of digital interactive media that is increasingly used in the Internet and also in the support of education. Last year, a special pilot audiovisual lecture room was built as a part of the MERLINGO (MEdia-rich Repository of LearnING Objects project solution. It contains all the elements of the modern lecture room determined for the implementation of presentation recordings based on the rich-media technologies and their publication online or on-demand featuring the access of all its elements in the automated mode including automatic editing. Property-preserving Petri net process algebras (PPPA were designed for the specification and verification of the Petri net processes. PPPA does not need to verify the composition of the Petri net processes because all their algebraic operators preserve the specified set of the properties. These original PPPA are significantly generalized for the newly introduced class of the SNT Petri process and agent nets in this paper. The PLACE-SUBST and ASYNC-PROC algebraic operators are defined for this class of Petri nets and their chosen properties are proved. The SNT Petri process and agent nets theory were significantly applied at the design, verification, and implementation of the programming system ensuring the pilot audiovisual lecture room functionality.

Understanding the online channel extension of traditional retailers: Online-offline and online-prototypical congruence

OpenAIRE

Wu Jinfeng; Li Yilong

2016-01-01

Many Chinese traditional retailers have turned to the multichannel forms by establishing their own online stores. When doing so, retail managers face a difficult choice between two online marketing orientations: “pursuit of ideal” (i.e. online-prototypical congruence orientation) and “retention of tradition” (i.e. online-offline congruence orientation). To help managers make this choice, this study proposes a conceptual framework to illustrate how these two orientations affect retail store at...

Factors and Predictors of Online Security and Privacy Behavior

Directory of Open Access Journals (Sweden)

Goran Bubaš

2008-12-01

Full Text Available Assumptions and habits regarding computer and Internet use are among the major factors which influence online privacy and security of Internet users. In our study a survey was performed on 312 subjects (college students who are Internet users with IT skills that investigated how assumptions and habits of Internet users are related to their online security and privacy. The following four factors of online security and privacy related behaviors were revealed in factor analysis: F1 – conscientiousness in the maintenance of the operating system, upgrading of the Internet browser and use of antivirus and antispyware programs; F2 –engagement in risky and careless online activities with lack of concern for personal online privacy; F3 – disbelief that privacy violations and security threats represent possible problems; F4 – lack of fear regarding potential privacy and security threats with no need for change in personal online behavior. Statistically significant correlations were found between some of the discovered factors on the one side, and criteria variables occurrence of malicious code (C1 and data loss on the home computer (C2 on the other. In addition, a regression analysis was performed which revealed that the potentially risky online behaviors of Internet users were associated with the two criteria variables. To properly interpret the results of correlation and regression analyses a conceptual model was developed of the potential causal relationships between the behavior of Internet users and their experiences with online security threats. An additional study was also performed which partly confirmed the conceptual model, as well as the factors of online security and privacy related behaviors.

Proton-rich nuclear statistical equilibrium

International Nuclear Information System (INIS)

Seitenzahl, I.R.; Timmes, F.X.; Marin-Lafleche, A.; Brown, E.; Magkotsios, G.; Truran, J.

2008-01-01

Proton-rich material in a state of nuclear statistical equilibrium (NSE) is one of the least studied regimes of nucleosynthesis. One reason for this is that after hydrogen burning, stellar evolution proceeds at conditions of an equal number of neutrons and protons or at a slight degree of neutron-richness. Proton-rich nucleosynthesis in stars tends to occur only when hydrogen-rich material that accretes onto a white dwarf or a neutron star explodes, or when neutrino interactions in the winds from a nascent proto-neutron star or collapsar disk drive the matter proton-rich prior to or during the nucleosynthesis. In this Letter we solve the NSE equations for a range of proton-rich thermodynamic conditions. We show that cold proton-rich NSE is qualitatively different from neutron-rich NSE. Instead of being dominated by the Fe-peak nuclei with the largest binding energy per nucleon that have a proton-to-nucleon ratio close to the prescribed electron fraction, NSE for proton-rich material near freezeout temperature is mainly composed of 56Ni and free protons. Previous results of nuclear reaction network calculations rely on this nonintuitive high-proton abundance, which this Letter explains. We show how the differences and especially the large fraction of free protons arises from the minimization of the free energy as a result of a delicate competition between the entropy and nuclear binding energy.

Accuracy of self-reported versus actual online gambling wins and losses.

Science.gov (United States)

Braverman, Julia; Tom, Matthew A; Shaffer, Howard J

2014-09-01

This study is the first to compare the accuracy of self-reported with actual monetary outcomes of online fixed odds sports betting, live action sports betting, and online casino gambling at the individual level of analysis. Subscribers to bwin.party digital entertainment's online gambling service volunteered to respond to the Brief Bio-Social Gambling Screen and questions about their estimated gambling results on specific games for the last 3 or 12 months. We compared the estimated results of each subscriber with his or her actual betting results data. On average, between 34% and 40% of the participants expressed a favorable distortion of their gambling outcomes (i.e., they underestimated losses or overestimated gains) depending on the time period and game. The size of the discrepancy between actual and self-reported results was consistently associated with the self-reported presence of gambling-related problems. However, the specific direction of the reported discrepancy (i.e., favorable vs. unfavorable bias) was not associated with gambling-related problems. PsycINFO Database Record (c) 2014 APA, all rights reserved.

MATLAB Simulation of Gradient-Based Neural Network for Online Matrix Inversion

Science.gov (United States)

Zhang, Yunong; Chen, Ke; Ma, Weimu; Li, Xiao-Dong

This paper investigates the simulation of a gradient-based recurrent neural network for online solution of the matrix-inverse problem. Several important techniques are employed as follows to simulate such a neural system. 1) Kronecker product of matrices is introduced to transform a matrix-differential-equation (MDE) to a vector-differential-equation (VDE); i.e., finally, a standard ordinary-differential-equation (ODE) is obtained. 2) MATLAB routine "ode45" is introduced to solve the transformed initial-value ODE problem. 3) In addition to various implementation errors, different kinds of activation functions are simulated to show the characteristics of such a neural network. Simulation results substantiate the theoretical analysis and efficacy of the gradient-based neural network for online constant matrix inversion.

Instructional Design for Online Learning Environments and the Problem of Collaboration in the Cloud

Science.gov (United States)

Mehlenbacher, Brad; Kelly, Ashley Rose; Kampe, Christopher; Kittle Autry, Meagan

2018-01-01

To investigate how college students understand and use cloud technology for collaborative writing, the authors studied two asynchronous online courses, on science communication and on technical communication. Students worked on a group assignment (3-4 per group) using Google Docs and individually reflected on their experience writing…

On-line single server dial-a-ride problems

NARCIS (Netherlands)

Feuerstein, E.; Stougie, L.

1998-01-01

In this paper results on the dial-a-ride problem with a single server are presented. Requests for rides consist of two points in a metric space, a source and a destination. A ride has to be made by the server from the source to the destination. The server travels at unit speed in the metric space

Robustness analysis of the Zhang neural network for online time-varying quadratic optimization

International Nuclear Information System (INIS)

Zhang Yunong; Ruan Gongqin; Li Kene; Yang Yiwen

2010-01-01

A general type of recurrent neural network (termed as Zhang neural network, ZNN) has recently been proposed by Zhang et al for the online solution of time-varying quadratic-minimization (QM) and quadratic-programming (QP) problems. Global exponential convergence of the ZNN could be achieved theoretically in an ideal error-free situation. In this paper, with the normal differentiation and dynamics-implementation errors considered, the robustness properties of the ZNN model are investigated for solving these time-varying problems. In addition, linear activation functions and power-sigmoid activation functions could be applied to such a perturbed ZNN model. Both theoretical-analysis and computer-simulation results demonstrate the good ZNN robustness and superior performance for online time-varying QM and QP problem solving, especially when using power-sigmoid activation functions.

Trustworthy Online Shopping with Price Impact

Directory of Open Access Journals (Sweden)

Musial Jedrzej

2017-06-01

Full Text Available Internet shopping is one of the main pillars of electronic commerce.According to the literature, the Internet Shopping Optimization Problem (ISOPhas been defined in order to optimize the global cost of online purchase, taking into account both the cost of products and shipping. In this study, it was decided to propose and analyze a very interesting, and really substantial, extension of the ISOP.Namely, trust factors were subjected to careful analysis from the customer point of view. The analysis is based on a specially prepared questionnaire, supplemented by the information from the literature and our own observations. Thus, it was possible to propose a definition of a new mathematical model of the problem, and to prove its affiliation to the class of strongly NP-hard problems. In addition, the heuristic algorithm is proposed, which can be used to solve the problem.

Development of the acquisition model of online information resources at Faculty of Medicine Library, Khon Kaen University.

Science.gov (United States)

Thanapaisal, Soodjai; Thanapaisal, Chaiwit

2013-09-01

Faculty of Medicine Library, Khon Kaen University started to acquire online information resources since 2001 with the subscriptions to 2 databases. Nowadays it has 29 items of subscriptions and the expenses on online information resources reach to 17 million baht, more than 70 percent of the information resources budget, serving the academic purposes of the Faculty of Medicine. The problems of online information resources acquisition fall into 4 categories, and lead to 4 aspects conforming the model of the acquisition, comparing or benchmarking with the 4 selected medical school libraries in Bangkok, Chiang Mai, and Songkhla, and discussion with some other Thai and foreign libraries. The acquisition model of online information resources is developed from those problems and proposed for Faculty of Medicine Library, Khon Kaen University as well as for any medical libraries which prefer.

An online randomized controlled trial, with or without problem-solving treatment, for long-term cancer survivors after hematopoietic cell transplantation.

Science.gov (United States)

Syrjala, Karen L; Yi, Jean C; Artherholt, Samantha B; Romano, Joan M; Crouch, Marie-Laure; Fiscalini, Allison S; Hegel, Mark T; Flowers, Mary E D; Martin, Paul J; Leisenring, Wendy M

2018-05-05

This randomized controlled trial examines the efficacy of INSPIRE, an INternet-based Survivorship Program with Information and REsources, with or without problem-solving treatment (PST) telehealth calls, for survivors after hematopoietic cell transplantation (HCT). All adult survivors who met eligibility criteria were approached for consent. Participants completed patient-reported outcomes at baseline and 6 months. Those with baseline impaired scores on one or more of the outcomes were randomized to INSPIRE, INSPIRE + PST, or control with delayed INSPIRE access. Outcomes included Cancer and Treatment Distress, Symptom Checklist-90-R Depression, and Fatigue Symptom Inventory. Planned analyses compared arms for mean change in aggregated impaired outcomes and for proportion of participants improved on each outcome. Of 1306 eligible HCT recipients, 755 (58%) participated, and 344 (45%) had one or more impaired scores at baseline. We found no reduction in aggregated outcomes for either intervention (P > 0.3). In analyses of individual outcomes, participants randomized to INSPIRE + PST were more likely to improve in distress than controls (45 vs. 20%, RR 2.3, CI 1.0, 5.1); those randomized to INSPIRE alone were marginally more likely to improve in distress (40 vs. 20%, RR 2.0, CI 0.9, 4.5). The INSPIRE online intervention demonstrated a marginal benefit for distress that improved with the addition of telehealth PST, particularly for those who viewed the website or were age 40 or older. Online and telehealth programs such as INSPIRE offer opportunities to enhance HCT survivorship outcomes, particularly for mood, though methods would benefit from strategies to improve efficacy.

Teaching problem solving: Don't forget the problem solver(s)

Science.gov (United States)

Ranade, Saidas M.; Corrales, Angela

2013-05-01

The importance of intrapersonal and interpersonal intelligences has long been known but educators have debated whether to and how to incorporate those topics in an already crowded engineering curriculum. In 2010, the authors used the classroom as a laboratory to observe the usefulness of including selected case studies and exercises from the fields of neurology, artificial intelligence, cognitive sciences and social psychology in a new problem-solving course. To further validate their initial findings, in 2012, the authors conducted an online survey of engineering students and engineers. The main conclusion is that engineering students will benefit from learning more about the impact of emotions, culture, diversity and cognitive biases when solving problems. Specifically, the work shows that an augmented problem-solving curriculum needs to include lessons on labelling emotions and cognitive biases, 'evidence-based' data on the importance of culture and diversity and additional practice on estimating conditional probability.

On a Modeling of Online User Behavior Using Function Representation

Directory of Open Access Journals (Sweden)

Pavel Pesout

2012-01-01

Full Text Available Understanding the online user system requirements has become very crucial for online services providers. The existence of many users and services leads to different users’ needs. The objective of this presented piece of work is to explore the algorithms of how to optimize providers supply with proposing a new way to represent user requirements as continuous functions depending on time. We address the problems of the prediction the of system requirements and reducing model complexity by creating the typical user behavior profiles.

Spes: An intense source of Neutron-Rich Radioactive Beams at Legnaro

Science.gov (United States)

Andrighetto, A.; Manzolaro, M.; Corradetti, S.; Scarpa, D.; Monetti, A.; Rossignoli, M.; Ballan, M.; Borgna, F.; D'Agostini, F.; Gramegna, F.; Prete, G.; Meneghetti, G.; Ferrari, M.; Zenoni, A.

2018-02-01

The Isotope Separation On-Line (ISOL) method for the production of Radioactive Ion Beams (RIB) is attracting significant interest in the worldwide nuclear physics community. Within this context the SPES (Selective Production of Exotic Species) RIB facility is now under construction at INFN LNL (Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Legnaro). This technique is established as one of the main techniques for high intensity and high quality beams production. The SPES facility will produce n-rich isotopes by means of a 40 MeV proton beam, emitted by a cyclotron, impinging on a uranium carbide multi-foil fission target. The aim of this work is to describe the most important results obtained by the study of the on-line behavior of the SPES production target assembly. This target system will produce RIBs at a rate of about 1013 fissions per second, it will be able to dissipate a total power of up to 10 kW, and it is planned to work continuously for 2 week-runs of irradiation. ISOL beams of 24 different elements will be produced, therefore a target and ion source development is ongoing to ensure a great variety of produced isotopes and to improve the beam intensity and purity.

Self-stigma and the intention to seek psychological help online compared to face-to-face.

Science.gov (United States)

Wallin, Emma; Maathz, Pernilla; Parling, Thomas; Hursti, Timo

2018-07-01

The present study aims to investigate the impact of help-seeking self-stigma on the preference and intention to seek psychological treatment delivered online compared to face-to-face. This study uses survey data from two Swedish samples. Sample 1 consists of 267 students (78.7% women) with a mean age of 24.5 (SD = 6.1). Sample 2 consists of 195 primary care patients (56.9% women) with a mean age of 45.3 (SD = 17.7). The number of participants who preferred online treatment was higher if seeking psychological help for a perceived stigmatized problem compared to mental health problems in general. The odds ratios for choosing treatment online over face-to-face were 6.41, 95% CI [4.05, 10.14] in Sample 1 and 11.19, 95% CI [5.29, 23.67] in Sample 2. In addition, findings suggest that higher levels of help-seeking self-stigma predicted higher intention to seek treatment online compared to face-to-face. Our results suggest that online interventions may facilitate help-seeking among individuals deterred by stigma. © 2018 Wiley Periodicals, Inc.

Online Patent Searching: Guided by an Expert System.

Science.gov (United States)

Ardis, Susan B.

1990-01-01

Describes the development of an expert system for online patent searching that uses menu driven software to interpret the user's knowledge level and the general nature of the search problem. The discussion covers the rationale for developing such a system, current system functions, cost effectiveness, user reactions, and plans for future…

Mining Trust Relationships from Online Social Networks

Institute of Scientific and Technical Information of China (English)

Yu Zhang; Tong Yu

2012-01-01

With the growing popularity of online social network,trust plays a more and more important role in connecting people to each other.We rely on our personal trust to accept recommendations,to make purchase decisions and to select transaction partners in the online community.Therefore,how to obtain trust relationships through mining online social networks becomes an important research topic.There are several shortcomings of existing trust mining methods.First,trust is category-dependent.However,most of the methods overlook the category attribute of trust relationships,which leads to low accuracy in trust calculation.Second,since the data in online social networks cannot be understood and processed by machines directly,traditional mining methods require much human effort and are not easily applied to other applications.To solve the above problems,we propose a semantic-based trust reasoning mechanism to mine trust relationships from online social networks automatically.We emphasize the category attribute of pairwise relationships and utilize Semantic Web technologies to build a domain ontology for data communication and knowledge sharing.We exploit role-based and behavior-based reasoning functions to infer implicit trust relationships and category-specific trust relationships.We make use of path expressions to extend reasoning rules so that the mining process can be done directly without much human effort.We perform experiments on real-life data extracted from Epinions.The experimental results verify the effectiveness and wide application use of our proposed method.

Platelet-rich plasma in otolaryngology.

Science.gov (United States)

Stavrakas, M; Karkos, P D; Markou, K; Grigoriadis, N

2016-12-01

Platelet-rich plasma is a novel material that is being used more frequently in many surgical specialties. A literature review on the current and potential uses of platelet-rich plasma in otolaryngology was performed. There is limited evidence on the use of platelet-rich plasma in otolaryngology compared with other specialties: only 11 studies on various subspecialties (otology, rhinology and laryngology) were included in the final review. Based on the limited number of studies, we cannot draw safe conclusions about the value of platelet-rich plasma in otolaryngology. Nevertheless, the available literature suggests that platelet-rich plasma holds promise for future research and may have a number of clinical applications.

A Model for Teaching Critical Thinking through Online Searching.

Science.gov (United States)

Crane, Beverley; Markowitz, Nancy Lourie

1994-01-01

Presents a model that uses online searching to teach critical thinking skills in elementary and secondary education based on Bloom's taxonomy. Three levels of activity are described: analyzing a search statement; defining and clarifying a problem; and focusing an information need. (Contains 13 references.) (LRW)

Homophily in an Anonymous Online Community: Sociodemographic Versus Personality Traits.

Science.gov (United States)

Kang, Jeong-Han; Chung, Da Young

2017-06-01

In what traits do people interact with others who are similar to them in completely anonymous online communication? Can those traits contribute to greater exchange of opinion and information across the sociodemographic boundaries that often limit interaction between social strata? To answer this question concerning online homophily, we combined survey data on 7,287 users (aged 18 and above) of a Korean online dating advice platform with their behavioral data from June 2015 to August 2015 and explored whether advice exchange occurred between users with similar sociodemographic and personality traits. On this platform, two types of interactions occurred as follows: (1) responses to a randomly distributed problem submitted by an advice seeker and (2) the seeker's indication of approval of any of the responses given. The study found that (1) a receiver was more likely to respond to problems submitted by seekers of a comparable age and that (2) seekers were more likely to approve of a response if the seeker and receiver had similar educational backgrounds. By contrast, homophily based on personality traits was not observed even though some personality traits significantly affected the likelihood of both response and approval. Our findings suggest that online communication may breed sociodemographic homophily, whether based on age or education, more than expected or intended while not easily fostering alternative forms of homophily, such as personality homophily, which can potentially cut across borders dividing sociodemographic groups.

Experience of e-learning implementation through massive open online courses

Science.gov (United States)

Ivleva, N. V.; Fibikh, E. V.

2016-04-01

E-learning is considered to be one of the most prospective directions in education development worldwide. To have a competitive advantage over other institutions offering a wide variety of educational services it is important to introduce information and communication technologies into the educational process to develop e-learning on the whole. The aim of the research is to reveal problems which prevent from full implementation of e-learning at the Reshetnev Siberian State Aerospace University (SibSAU) and to suggest ways on solving those problems through optimization of e-learning introduction process at the university by motivating students and teaching staff to participate in massive open online courses and formation of tailored platforms with the view to arrange similar courses at the premises of the university. The paper considers the introduction and development level of e-learning in Russia and at SibSAU particularly. It substantiates necessity to accelerate e-learning introduction process at an aerospace university as a base for training of highly-qualified specialists in the area of aviation, machine building, physics, info-communication technologies and also in other scientific areas within which university training is carried out. The paper covers SibSAU’s experience in e-learning implementation in the educational process through students and teaching staff participation in massive open online courses and mastering other up-to-date and trendy educational platforms and their usage in the educational process. Key words. E-learning, distance learning, online learning, massive open online course.

Drug related problems with Antiparkinsonian agents: consumer Internet reports versus published data.

Science.gov (United States)

Schröder, Sabrina; Zöllner, York Francis; Schaefer, Marion

2007-10-01

There is currently a lack of detailed information concerning drug related problems in the outpatient treatment of Parkinson's disease. Problems associated with drug treatment communicated anonymously in Parkinson's disease online forums were therefore retrospectively searched and documented for 1 year. Based on postings concerning 12 drugs for the treatment of Parkinson's disease, a total of 238 drug related problems were identified and categorised using the Problem Intervention Documentation (PI-Doc). Of these, 153 were adverse drug reactions. Adverse drug reactions associated with the skin were relatively common, but central effects such as cognitive or psychiatric changes, effects on the sleep/waking system and other problems like headache and dizziness accounted for the highest percentage of adverse events. A comparison with data from scientific literature revealed a number of differences. This means that an analysis of online forums detected a number of drug related problems that were otherwise largely invisible. These were mainly associated with the qualitative aspects of treatment such as medication handling, dosage and individual problems concerning adverse events. In addition, the described method of identifying and classifying drug related problems in Internet forums may also be seen as a contribution to the international discussion about consumer reports and pharmacovigilance. The information about adverse drug reactions given by Internet users can be seen as a valuable adjunct to clinical trial data and as being very timely with regard to the event itself. Online forums may be considered as a suitable source of observational information to complement data from randomised clinical trials.

The online data filters for Explorer and Nautilus

International Nuclear Information System (INIS)

D'Antonio, S

2002-01-01

The basic problem for gravitational wave detectors is to detect very small signals in the presence of noise which is often not Gaussian and not stationary. We cope with this problem by applying data filters, matched to short bursts, based on power spectra obtained online. We describe the new procedure adopted by the Rome group, where the signal-to-noise ratios obtained with various algorithms are compared and the best one is selected. The selected algorithm depends on the noise characteristics at that particular time

Analysis of Context Dependence in Social Interaction Networks of a Massively Multiplayer Online Role-Playing Game

Science.gov (United States)

Son, Seokshin; Kang, Ah Reum; Kim, Hyun-chul; Kwon, Taekyoung; Park, Juyong; Kim, Huy Kang

2012-01-01

Rapid advances in modern computing and information technology have enabled millions of people to interact online via various social network and gaming services. The widespread adoption of such online services have made possible analysis of large-scale archival data containing detailed human interactions, presenting a very promising opportunity to understand the rich and complex human behavior. In collaboration with a leading global provider of Massively Multiplayer Online Role-Playing Games (MMORPGs), here we present a network science-based analysis of the interplay between distinct types of user interaction networks in the virtual world. We find that their properties depend critically on the nature of the context-interdependence of the interactions, highlighting the complex and multilayered nature of human interactions, a robust understanding of which we believe may prove instrumental in the designing of more realistic future virtual arenas as well as provide novel insights to the science of collective human behavior. PMID:22496771

Analysis of context dependence in social interaction networks of a massively multiplayer online role-playing game.

Directory of Open Access Journals (Sweden)

Seokshin Son

Full Text Available Rapid advances in modern computing and information technology have enabled millions of people to interact online via various social network and gaming services. The widespread adoption of such online services have made possible analysis of large-scale archival data containing detailed human interactions, presenting a very promising opportunity to understand the rich and complex human behavior. In collaboration with a leading global provider of Massively Multiplayer Online Role-Playing Games (MMORPGs, here we present a network science-based analysis of the interplay between distinct types of user interaction networks in the virtual world. We find that their properties depend critically on the nature of the context-interdependence of the interactions, highlighting the complex and multilayered nature of human interactions, a robust understanding of which we believe may prove instrumental in the designing of more realistic future virtual arenas as well as provide novel insights to the science of collective human behavior.

Psychometric properties of the problematic online gaming questionnaire short-form and prevalence of problematic online gaming in a national sample of adolescents.

Science.gov (United States)

Pápay, Orsolya; Urbán, Róbert; Griffiths, Mark D; Nagygyörgy, Katalin; Farkas, Judit; Kökönyei, Gyöngyi; Felvinczi, Katalin; Oláh, Attila; Elekes, Zsuzsanna; Demetrovics, Zsolt

2013-05-01

The rise and growing popularity of online games has led to the appearance of excessive gaming that in some cases can lead to physical and psychological problems. Several measures have been developed to explore the nature and the scale of the phenomenon. However, few measures have been validated psychometrically. The aim of the present study was to test the psychometric properties of the 12-item Problematic Online Gaming Questionnaire Short-Form (POGQ-SF) and to assess the prevalence of problematic online gaming. Data collection was carried out to assess the prevalence of problematic online gaming in a national representative adolescent sample by using an offline (pen and pencil) method. A total of 5,045 secondary school students were assessed (51% male, mean age 16.4 years, SD=0.9 years) of which 2,804 were gamers (65.4% male, mean age 16.4 years, SD=0.9 years). Confirmatory factor analysis was applied to test the measurement model of problematic online gaming, and latent profile analysis was used to identify the proportion of gamers whose online game use can be considered problematic. Results showed that the original six-factor model yielded appropriate fit to the data, and thus the POGQ-SF has appropriate psychometric properties. Latent profile analysis revealed that 4.6% of the adolescents belong to a high risk group and an additional 13.3% to a low risk group. Due to its satisfactory psychometric characteristics, the 12-item POGQ-SF appears to be an adequate tool for the assessment of problematic online gaming.

Flex 4 Cookbook Real-world recipes for developing Rich Internet Applications

CERN Document Server

Noble, Joshua; Braithwaite, Garth; Casario, Marco; Tretola, Rich

2010-01-01

With this collection of proven recipes, you have the ideal problem-solving guide for developing interactive Rich Internet Applications on the Adobe Flash Platform. You'll find answers to hundreds of common problems you may encounter when using Adobe Flex, Flex 4 Framework, or Flash Builder, Adobe's GUI-based development tool. Flex 4 Cookbook has hands-on recipes for everything from Flex basics to solutions for working with visual components and data access, as well as tips on application development, unit testing, and Adobe AIR. Each recipe provides an explanation of how and why it works, an

Using Everyday Materials To Promote Problem Solving in Toddlers.

Science.gov (United States)

Segatti, Laura; Brown-DuPaul, Judy; Keyes, Tracy L.

2003-01-01

Outlines benefits of and skills involved in problem solving. Details how an environment rich in materials that foster cause-and-effect or trial-and-error explorations promote cognitive development among toddlers. Offers examples of problem-solving experiences and lists materials for use in curriculum planning. Describes the teacher' role as one of…

The Effects of Online Peer Assessment and Family Entrepreneurial Experience on Students' Business Planning Performance

Science.gov (United States)

Lee, Chun-Yi

2015-01-01

Problem Statement: In recent years, many educators and researchers in the field of education have made efforts to leverage the advantages provided by online peer assessment, leading to its extensive application in a range of domains, particularly higher education. However, studies on the roles of the reviewer and author in online peer assessment…

Using a Design-Based Research Study to Identify Principles for Training Instructors to Teach Online

Science.gov (United States)

Shattuck, Julie; Anderson, Terry

2013-01-01

Within the overall framework of design-based research, this paper reports on a study that focused on evaluating an online training course for online instructors. This intervention was designed as a possible solution to the problem facing some higher education institutions of how to provide quality, accessible training for mostly part-time…

Experimental study of the single electron response of the DELPHI Barrel RICH MWPC's

International Nuclear Information System (INIS)

Dracos, M.

1989-01-01

We present herewith the results of an experimental study of the multiwire proportionnal chambers (MWPC's) used in the Barrel RICH particle identifier of the LEP-DELPHI experiment. Emphasis is given to the problem of detection efficiency and to the measurements of the charge induced by a single photoelectron

NeXML: rich, extensible, and verifiable representation of comparative data and metadata.

Science.gov (United States)

Vos, Rutger A; Balhoff, James P; Caravas, Jason A; Holder, Mark T; Lapp, Hilmar; Maddison, Wayne P; Midford, Peter E; Priyam, Anurag; Sukumaran, Jeet; Xia, Xuhua; Stoltzfus, Arlin

2012-07-01

In scientific research, integration and synthesis require a common understanding of where data come from, how much they can be trusted, and what they may be used for. To make such an understanding computer-accessible requires standards for exchanging richly annotated data. The challenges of conveying reusable data are particularly acute in regard to evolutionary comparative analysis, which comprises an ever-expanding list of data types, methods, research aims, and subdisciplines. To facilitate interoperability in evolutionary comparative analysis, we present NeXML, an XML standard (inspired by the current standard, NEXUS) that supports exchange of richly annotated comparative data. NeXML defines syntax for operational taxonomic units, character-state matrices, and phylogenetic trees and networks. Documents can be validated unambiguously. Importantly, any data element can be annotated, to an arbitrary degree of richness, using a system that is both flexible and rigorous. We describe how the use of NeXML by the TreeBASE and Phenoscape projects satisfies user needs that cannot be satisfied with other available file formats. By relying on XML Schema Definition, the design of NeXML facilitates the development and deployment of software for processing, transforming, and querying documents. The adoption of NeXML for practical use is facilitated by the availability of (1) an online manual with code samples and a reference to all defined elements and attributes, (2) programming toolkits in most of the languages used commonly in evolutionary informatics, and (3) input-output support in several widely used software applications. An active, open, community-based development process enables future revision and expansion of NeXML.

Hydrogen production by catalytic processing of renewable methane-rich gases

Energy Technology Data Exchange (ETDEWEB)

Muradov, Nazim; Smith, Franklyn; T-Raissi, Ali [Florida Solar Energy Center, University of Central Florida, Cocoa, FL 32922-5703 (United States)

2008-04-15

Biomass-derived methane-rich gases such as landfill gas (LFG), biogas and digester gas are promising renewable resources for near-future production of hydrogen. The technical and economical feasibility of hydrogen production via catalytic reforming of LFG and other methane-rich gases is evaluated in this paper. The thermodynamic equilibrium calculations and experimental measurements of reformation of methane-rich CH{sub 4}-CO{sub 2} mixtures over Ni-based catalyst were conducted. The problems associated with the catalyst deactivation due to carbon lay down and effects of steam and oxygen on the process sustainability were explored. Two technological approaches distinguished by the mode of heat input to the endothermic process (i.e., external vs autothermal) were modeled using AspenPlus trademark chemical process simulator and validated experimentally. A 5 kW{sub th} pilot unit for hydrogen production from LFG-mimicking CH{sub 4}-CO{sub 2} mixture was fabricated and operated. A preliminary techno-economic assessment indicates that the liquid hydrogen production costs are in the range of 3.00-7.00 per kilogram depending upon the plant capacity, the process heat input option and whether or not carbon sequestration is included in the process. (author)

An Improved Cluster Richness Estimator

Energy Technology Data Exchange (ETDEWEB)

Rozo, Eduardo; /Ohio State U.; Rykoff, Eli S.; /UC, Santa Barbara; Koester, Benjamin P.; /Chicago U. /KICP, Chicago; McKay, Timothy; /Michigan U.; Hao, Jiangang; /Michigan U.; Evrard, August; /Michigan U.; Wechsler, Risa H.; /SLAC; Hansen, Sarah; /Chicago U. /KICP, Chicago; Sheldon, Erin; /New York U.; Johnston, David; /Houston U.; Becker, Matthew R.; /Chicago U. /KICP, Chicago; Annis, James T.; /Fermilab; Bleem, Lindsey; /Chicago U.; Scranton, Ryan; /Pittsburgh U.

2009-08-03

Minimizing the scatter between cluster mass and accessible observables is an important goal for cluster cosmology. In this work, we introduce a new matched filter richness estimator, and test its performance using the maxBCG cluster catalog. Our new estimator significantly reduces the variance in the L{sub X}-richness relation, from {sigma}{sub lnL{sub X}}{sup 2} = (0.86 {+-} 0.02){sup 2} to {sigma}{sub lnL{sub X}}{sup 2} = (0.69 {+-} 0.02){sup 2}. Relative to the maxBCG richness estimate, it also removes the strong redshift dependence of the richness scaling relations, and is significantly more robust to photometric and redshift errors. These improvements are largely due to our more sophisticated treatment of galaxy color data. We also demonstrate the scatter in the L{sub X}-richness relation depends on the aperture used to estimate cluster richness, and introduce a novel approach for optimizing said aperture which can be easily generalized to other mass tracers.

Investigation of neutron-rich rare-earth nuclei including the new isotopes 177Tm and 184Lu

International Nuclear Information System (INIS)

Rykaczewski, K.; Gippert, K.L.; Runte, E.; Schmidt-Ott, W.D.; Tidemand-Petersson, P.; Kurcewicz, W.; Nazarewicz, W.

1989-01-01

Decays of neutron-rich isotopes in the rare-earth region were studied by means of on-line mass separation and β-γ spectroscopy using multinucleon-transfer reactions between beams of 136 Xe (9 and 11.7 MeV/u), 186 W (11.7 and 15 MeV/u) and 238 U (11.4 MeV/u) and targets of nat W and Ta. The higher beam energies appear to be advantageous for the production of such isotopes. Two new isotopes were identified: 177 Tm with a half-life T 1/2 = 85±10/15 s, and 184 Lu with T 1/2 ≅ 18 s. A new 47 s-activity found at A = 171 is tentatively assigned to the decay of the new isotope 171 Ho. The properties of the ground and excited states of neutron-rich lanthanide isotopes are interpreted within the shell model using the deformed Woods-Saxon potential. A change of the ground-state configuration for odd-mass neutron-rich lutetium isotopes from π 7/2 + [404] to π 9/2 - [514] is suggested, this change being due to the influence of a large hexadecapole deformation. The role of a possible isometric state in 180 Lu for the nucleosynthesis of 180m Ta is discussed. (orig.)

Online or off-line victimisation and psychological well-being: a comparison of sexual-minority and heterosexual youth.

Science.gov (United States)

Priebe, Gisela; Svedin, Carl Göran

2012-10-01

The purpose of this study was to compare sexual-minority and heterosexual youths' exposure to sexual abuse off-line, problematic sexual meetings off-line with person/s met online and online harassment with regard to prevalence, psychological well-being and support seeking. A nationally representative sample of 3,432 Swedish high school seniors completed an anonymous school-based survey about sexuality, health, sexual abuse and online-related sexual victimisation or harassment. Sexual-minority adolescents reported a greater rate of sexual abuse, problematic sexual meetings off-line with person/s met online and online harassment, compared to heterosexual youth. When compared to non-victimised heterosexual adolescents, victimised heterosexual adolescents and non-victimised and victimised sexual-minority adolescents reported more psychiatric symptoms, lower self-esteem and a weaker sense of coherence. Same-sex sexual orientation was related to more psychiatric symptoms, lower self-esteem and a weaker sense of coherence even when controlled for victimisation and gender. Compared to victimised heterosexual adolescents, victimised sexual-minority adolescents were more likely to seek support because of sexual abuse (females) or Internet-related problems (males and females). Results for sexual-minority youth were basically the same whether sexual orientation was assessed as sexual identity or as sexual or emotional attraction. Health care providers are challenged to not only provide the same care to sexual-minority youth who seek counselling or psychiatric treatment for mental health problems or problems related to victimisation that all adolescents should receive but also to find ways to address topics like prevention of sexual abuse and risk-taking behaviour online or off-line.

An optimal algorithm for preemptive on-line scheduling

NARCIS (Netherlands)

Chen, B.; Vliet, van A.; Woeginger, G.J.

1995-01-01

We investigate the problem of on-line scheduling jobs on m identical parallel machines where preemption is allowed. The goal is to minimize the makespan. We derive an approximation algorithm with worst-case guarantee mm/(mm - (m - 1)m) for every m 2, which increasingly tends to e/(e - 1) ˜ 1.58 as m

Decentralization and mechanism design for online machine scheduling

NARCIS (Netherlands)

Arge, Lars; Heydenreich, Birgit; Müller, Rudolf; Freivalds, Rusins; Uetz, Marc Jochen

We study the online version of the classical parallel machine scheduling problem to minimize the total weighted completion time from a new perspective: We assume that the data of each job, namely its release date $r_j$, its processing time $p_j$ and its weight $w_j$ is only known to the job itself,

Genetic Algorithm and Graph Theory Based Matrix Factorization Method for Online Friend Recommendation

Directory of Open Access Journals (Sweden)

Qu Li

2014-01-01

Full Text Available Online friend recommendation is a fast developing topic in web mining. In this paper, we used SVD matrix factorization to model user and item feature vector and used stochastic gradient descent to amend parameter and improve accuracy. To tackle cold start problem and data sparsity, we used KNN model to influence user feature vector. At the same time, we used graph theory to partition communities with fairly low time and space complexity. What is more, matrix factorization can combine online and offline recommendation. Experiments showed that the hybrid recommendation algorithm is able to recommend online friends with good accuracy.

Silverlight 2 Recipes A Problem-solution Approach

CERN Document Server

Ghosh, Cameron

2010-01-01

Microsoft .NET Architect Evangelist, Jit Ghosh, presents a practical companion guide to developing rich, interactive web applications with Silverlight 2. Common problems, issues, and every--day scenarios are tackled with a detailed discussion of the solution and ready--made code recipes that will save you hours of coding time. The recipes included in Silverlight 2 Recipes: A Problem-Solution Approach have been carefully selected and tested with the professional developer in mind. You'll find clearly and succinctly stated problems, well--architected solutions, and ample discussion of the code a

GamTest: Psychometric Evaluation and the Role of Emotions in an Online Self-Test for Gambling Behavior.

Science.gov (United States)

Jonsson, Jakob; Munck, Ingrid; Volberg, Rachel; Carlbring, Per

2017-06-01

Recent increases in the number of online gambling sites have made gambling more available, which may contribute to an increase in gambling problems. At the same time, online gambling provides opportunities to introduce measures intended to prevent problem gambling. GamTest is an online test of gambling behavior that provides information that can be used to give players individualized feedback and recommendations for action. The aim of this study is to explore the dimensionality of GamTest and validate it against the Problem Gambling Severity Index (PGSI) and the gambler's own perceived problems. A recent psychometric approach, exploratory structural equation modeling (ESEM) is used. Well-defined constructs are identified in a two-step procedure fitting a traditional exploratory factor analysis model as well as a so-called bifactor model. Using data collected at four Nordic gambling sites in the autumn of 2009 (n = 10,402), the GamTest ESEM analyses indicate high correspondence with the players' own understanding of their problems and with the PGSI, a validated measure of problem gambling. We conclude that GamTest captures five dimensions of problematic gambling (i.e., overconsumption of money and time, and monetary, social and emotional negative consequences) with high reliability, and that the bifactor approach, composed of a general factor and specific residual factors, reproduces all these factors except one, the negative consequences emotional factor, which contributes to the dominant part of the general factor. The results underscore the importance of tailoring feedback and support to online gamblers with a particular focus on how to handle emotions in relation to their gambling behavior.

Online Tracking Technologies and Web Privacy:Technologieën voor Online volgen en Web Privacy

OpenAIRE

Acar, Mustafa Gunes Can

2017-01-01

In my PhD thesis, I would like to study the problem of online privacy with a focus on Web and mobile applications. Key research questions to be addressed by my study are the following: How can we formalize and quantify web tracking? What are the threats presented against privacy by different tracking techniques such as browser fingerprinting and cookie based tracking? What kind of privacy enhancing technologies (PET) can be used to ensure privacy without degrading service quality? The stud...

Instructional Designers' Media Selection Practices for Distributed Problem-Based Learning Environments

Science.gov (United States)

Fells, Stephanie

2012-01-01

The design of online or distributed problem-based learning (dPBL) is a nascent, complex design problem. Instructional designers are challenged to effectively unite the constructivist principles of problem-based learning (PBL) with appropriate media in order to create quality dPBL environments. While computer-mediated communication (CMC) tools and…

Online Facebook Focus Group Research of Hard-to-Reach Participants

Directory of Open Access Journals (Sweden)

Anastasia Aldelina Lijadi

2015-12-01

Full Text Available Conducting discovery-oriented qualitative research about the life experiences of hard-to-reach individuals posed several challenges for recruiting participants and collecting rich textual data. In a study pertaining the experiences of Third Culture Kids (TCKs, we explored the benefits of the social media, such as Facebook as a platform to collect data. TCKs are individuals who define their sense of belonging to the third culture trailing their parents moving across borders during their developmental years. Adult TCKs live in many different countries, and accessing and interviewing respondents could be a difficult and costly endeavor. In this article, the authors share their experience conducting online, asynchronous focus groups using a Facebook platform. We reflect upon the process of setting up a secret Facebook focus group for research purposes, recruiting participants, rapport building between facilitator and participants, monitoring and keeping track of participants’ responses, and the dynamics emerging within an online focus group. We also discuss the novelty, limitations, and benefits of the Facebook focus group as an emerging mode for collecting qualitative data from hard-to-reach participants.

Determinants of online trust and their impact on online purchase intention

OpenAIRE

Kooli, Kaouther; Ben Mansour, K.; Rizky , Utama

2014-01-01

Abundant literature has examined online trust. However the different approaches were scarcely integrated to address the determinants of online trust and their impacts on online purchase intention. An integrative approach to online trust is adopted in this paper. A survey is carried out on a sample of 401 online consumers in Indonesia. The findings show that purchase intention is significantly influenced by online trust. Besides, there is significant impact of personality based trust (benevole...

Learners' perceived information overload in online learning via computer-mediated communication

Directory of Open Access Journals (Sweden)

Karen L. Murphy

2011-12-01

Full Text Available Many studies report information overload as one of the main problems that students encounter in online learning via computer-mediated communication. This study aimed to explore the sources of online students' information overload and offer suggestions for increasing students' cognitive resources for learning. Participants were 12 graduate students from two online courses in the United States. Their learning experiences in both online discussions and on the course website were explored through semi-structured interviews. They also completed a background questionnaire that assessed three constructs that limit learner readiness and are likely to lead to online students' perceived information overload: inadequate prior knowledge, inadequate English proficiency, and lack of technical skills for participating in computer-mediated communications. The findings suggest that varied learner characteristics led some students to be more susceptible than others to information overload. Emerging data-driven risk factors were: lack of efficiency in reading from computer screens, visual and auditory learning preferences, and time constraints. Difficulties associated with students' perceptions of information overload are addressed and implications for course design are offered.

webMGR: an online tool for the multiple genome rearrangement problem.

Science.gov (United States)

Lin, Chi Ho; Zhao, Hao; Lowcay, Sean Harry; Shahab, Atif; Bourque, Guillaume

2010-02-01

The algorithm MGR enables the reconstruction of rearrangement phylogenies based on gene or synteny block order in multiple genomes. Although MGR has been successfully applied to study the evolution of different sets of species, its utilization has been hampered by the prohibitive running time for some applications. In the current work, we have designed new heuristics that significantly speed up the tool without compromising its accuracy. Moreover, we have developed a web server (webMGR) that includes elaborate web output to facilitate navigation through the results. webMGR can be accessed via http://www.gis.a-star.edu.sg/~bourque. The source code of the improved standalone version of MGR is also freely available from the web site. Supplementary data are available at Bioinformatics online.

On-line analyzers to distributed control system linking

Energy Technology Data Exchange (ETDEWEB)

Peterson, S.F.; Buchanan, B.R.; Sanders, M.A.

1990-01-01

The Analytical Development Section (ADS) of the Savannah River Laboratory is developing on-line analyzers to monitor various site processes. Data from some of the on-line analyzers (OLA's) will be used for process control by distributed control systems (DCS's) such as the Fisher PRoVOX. A problem in the past has been an efficient and cost effective way to get analyzer data onto the DCS data highway. ADS is developing a system to accomplish the linking of OLA's to PRoVOX DCS's. The system will be described, and results of operation in a research and development environment given. Plans for the installation in the production environment will be discussed.

On-Line Metrology with Conoscopic Holography: Beyond Triangulation

Directory of Open Access Journals (Sweden)

Ignacio Álvarez

2009-09-01

Full Text Available On-line non-contact surface inspection with high precision is still an open problem. Laser triangulation techniques are the most common solution for this kind of systems, but there exist fundamental limitations to their applicability when high precisions, long standoffs or large apertures are needed, and when there are difficult operating conditions. Other methods are, in general, not applicable in hostile environments or inadequate for on-line measurement. In this paper we review the latest research in Conoscopic Holography, an interferometric technique that has been applied successfully in this kind of applications, ranging from submicrometric roughness measurements, to long standoff sensors for surface defect detection in steel at high temperatures.

Formulated linear programming problems from game theory and its ...

African Journals Online (AJOL)

Formulated linear programming problems from game theory and its computer implementation using Tora package. ... Game theory, a branch of operations research examines the various concepts of decision ... AJOL African Journals Online.

Online support for transgender people: an analysis of forums and social networks.

Science.gov (United States)

Cipolletta, Sabrina; Votadoro, Riccardo; Faccio, Elena

2017-09-01

Transgender people face a range of personal and social conflicts that strongly influence their well-being. In many cases, the Internet can become the main resource in terms of finding support. The aim of this study was to understand how transgender people give and receive help online. Between 2013 and 2015, 122 online community conversations were collected on Italian forums and Facebook groups involving transgender people, and online interviews were conducted with 16 users of these communities. A qualitative content analysis was conducted by using the software package, NVivo10. The main categories that emerged were: motivations to join an online community, online help, differences between online and offline interactions, status, conflicts and professional help. Results indicate that participation in online communities often derives from the users' need for help. This help can be given by peers who have had similar experiences, and by professionals who participate in the discussions as moderator. The need to test one's own identity, to compare oneself with others and to share one's personal experiences made online communities at risk of exposing users to invalidation and transphobic messages. Administrators and moderators try to ensure the safety of users, and suggest that they ask for professional help offline and/or online when over-specific medical advice was sought. This study confirms that transgender people might find benefit from an online platform of help and support and might minimise distance problems, increase financial convenience and foster disinhibition. © 2017 John Wiley & Sons Ltd.

LHCB RICH gas system proposal

CERN Document Server

Bosteels, Michel; Haider, S

2001-01-01

Both LHCb RICH will be operated with fluorocarbon as gas radiator. RICH 1 will be filled with 4m^3 of C4F10 and RICH 2 with 100m^3 of CF4. The gas systems will run as a closed loop circulation and a gas recovery system within the closed loop is planned for RICH 1, where the recovery of the CF4 will only be realised during filling and emptying of the detector. Inline gas purification is foreseen for the gas systems in order to limit water and oxygen impurities.

A hybrid online scheduling mechanism with revision and progressive techniques for autonomous Earth observation satellite

Science.gov (United States)

Li, Guoliang; Xing, Lining; Chen, Yingwu

2017-11-01

The autonomicity of self-scheduling on Earth observation satellite and the increasing scale of satellite network attract much attention from researchers in the last decades. In reality, the limited onboard computational resource presents challenge for the online scheduling algorithm. This study considered online scheduling problem for a single autonomous Earth observation satellite within satellite network environment. It especially addressed that the urgent tasks arrive stochastically during the scheduling horizon. We described the problem and proposed a hybrid online scheduling mechanism with revision and progressive techniques to solve this problem. The mechanism includes two decision policies, a when-to-schedule policy combining periodic scheduling and critical cumulative number-based event-driven rescheduling, and a how-to-schedule policy combining progressive and revision approaches to accommodate two categories of task: normal tasks and urgent tasks. Thus, we developed two heuristic (re)scheduling algorithms and compared them with other generally used techniques. Computational experiments indicated that the into-scheduling percentage of urgent tasks in the proposed mechanism is much higher than that in periodic scheduling mechanism, and the specific performance is highly dependent on some mechanism-relevant and task-relevant factors. For the online scheduling, the modified weighted shortest imaging time first and dynamic profit system benefit heuristics outperformed the others on total profit and the percentage of successfully scheduled urgent tasks.

Development of an Online and Offline Integration Hypothesis for Healthy Internet Use: Theory and Preliminary Evidence

Directory of Open Access Journals (Sweden)

Xiaoyan Lin

2018-04-01

Full Text Available The Internet has become an integral part of our daily life, and how to make the best use of the Internet is important to both individuals and the society. Based on previous studies, an Online and Offline Integration Hypothesis is proposed to suggest a framework for considering harmonious and balanced Internet use. The Integration Hypothesis proposes that healthier patterns of Internet usage may be achieved through harmonious integration of people’s online and offline worlds. An online/offline integration is proposed to unite self-identity, interpersonal relationships, and social functioning with both cognitive and behavioral aspects by following the principles of communication, transfer, consistency, and “offline-first” priorities. To begin to test the hypothesis regarding the relationship between integration level and psychological outcomes, data for the present study were collected from 626 undergraduate students (41.5% males. Participants completed scales for online and offline integration, Internet addiction, pros and cons of Internet use, loneliness, extraversion, and life satisfaction. The findings revealed that subjects with higher level of online/offline integration have higher life satisfaction, greater extraversion, and more positive perceptions of the Internet and less loneliness, lower Internet addiction, and fewer negative perceptions of the Internet. Integration mediates the link between extraversion and psychological outcomes, and it may be the mechanism underlying the difference between the “rich get richer” and social compensation hypotheses. The implications of the online and offline integration hypothesis are discussed.

Development of an Online and Offline Integration Hypothesis for Healthy Internet Use: Theory and Preliminary Evidence.

Science.gov (United States)

Lin, Xiaoyan; Su, Wenliang; Potenza, Marc N

2018-01-01

The Internet has become an integral part of our daily life, and how to make the best use of the Internet is important to both individuals and the society. Based on previous studies, an Online and Offline Integration Hypothesis is proposed to suggest a framework for considering harmonious and balanced Internet use. The Integration Hypothesis proposes that healthier patterns of Internet usage may be achieved through harmonious integration of people's online and offline worlds. An online/offline integration is proposed to unite self-identity, interpersonal relationships, and social functioning with both cognitive and behavioral aspects by following the principles of communication, transfer, consistency, and "offline-first" priorities. To begin to test the hypothesis regarding the relationship between integration level and psychological outcomes, data for the present study were collected from 626 undergraduate students (41.5% males). Participants completed scales for online and offline integration, Internet addiction, pros and cons of Internet use, loneliness, extraversion, and life satisfaction. The findings revealed that subjects with higher level of online/offline integration have higher life satisfaction, greater extraversion, and more positive perceptions of the Internet and less loneliness, lower Internet addiction, and fewer negative perceptions of the Internet. Integration mediates the link between extraversion and psychological outcomes, and it may be the mechanism underlying the difference between the "rich get richer" and social compensation hypotheses. The implications of the online and offline integration hypothesis are discussed.

Development of an Online and Offline Integration Hypothesis for Healthy Internet Use: Theory and Preliminary Evidence