Development of a web-based user experience evaluation system for home appliances

Park, Joohwan,Han, Sung H.,Park, Jungchul,Park, Jaehyun,Kwahk, Jiyoung,Lee, Mingyu,Jeong, Dong Yeong Elsevier 2018 International journal of industrial ergonomics Vol.67 No.-

<P><B>Abstract</B></P> <P>Although the home appliance industry is globally growing, there are many cases where the companies do not have user experience (UX) specialists enough to cover all their product lineups, and often the costs are too high for external referrals. The objective of the study is to provide a system to evaluate user experience (UX) for home appliance enterprises. The goal of the proposed system is to provide professional diagnosis and feedback to improve UX with home appliances, based on the usability, affect, and user value principles. A questionnaire composed of 109 items was developed for UX evaluation of home appliances by considering design elements and design principles together. A web-based UX evaluation system was developed by using the questionnaire items, and its usability as well as face validity were evaluated by nine domain experts and nine product designers as acceptable.</P> <P><B>Relevance to Industry</B></P> <P>The proposed system is expected to provide useful information for design improvement in the product planning and design phases of home appliance enterprises.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Design elements and UX design principles of home appliances were identified. </LI> <LI> 109 questionnaire items were developed for UX evaluation of home appliances. </LI> <LI> A web-based UX evaluation system was developed by using the questionnaire items. </LI> <LI> Experts and designers evaluated usability and validity of the system as acceptable. </LI> </UL> </P>

중소기업 가전제품의 사용자 경험 평가를 위한 평가 도구 개발

Joohwan Park,Sung H. Han,Jungchul Park,Jaehyun Park,Bora Kang,Mingyu Lee,Dong Yeong Jeong,Hyeji Jang,Dawoon Jeong 대한인간공학회 2016 대한인간공학회 학술대회논문집 Vol.2016 No.06

Objective: This study aimed to develop a tool to evaluate User Experience (UX) for the home appliance design. Background: Nowadays, UX is considered to be one of most important concepts to be considered by product designers. Home appliance product designers are trying to enhance the UX of their products to achieve competitive advantage across the industry. However, the number of UX evaluation tools that could be applied to home appliances is limited. It is needed to provide an UX evaluation tool to consider several different perspectives of UX such as usability, affective satisfaction, and value. Method: This study followed three stages. (1) UX design principles for home appliance were defined by literature review, web document analysis. (2) Design elements of home appliances are also defined through literature survey and product design property analysis. (3) UX design guidelines and UX evaluation questionnaires were generated based on the feasible combinations of these UX design principles and design elements. The generated questionnaires were filtered and merged into a total of 109 questionnaires by experts. Results: A UX evaluation tool for home appliance that consist of 109 questionnaires were developed. Application: The proposed UX evaluation tool could be useful for designers of home appliance industry to evaluate UX of their products and clarify the weak points of the designs.

다양한 가전제품의 사용자 경험 평가를 위한 웹 기반의 사용자 경험 진단 플랫폼 개발

Joohwan Park,Sung H. Han,Jiyoung Kwahk,Jungchul Park,Jaehyun Park,Bora Kang,Mingyu Lee,Dong Yeong Jeong,Hyeji Jang,Dawoon Jeong 대한인간공학회 2016 대한인간공학회 학술대회논문집 Vol.2016 No.11

This study aimed to develop a platform to diagnose and evaluate User Experience (UX) for the consumer electronic products. UX is one of the most important concepts to be considered by electronic product designers. However, the designers often experience the lack of a UX management platform to diagnose, evaluate, and enhance the UX. It is needed to provide a UX management platform to consider and review several different perspectives of UX such as usability, affective satisfaction, and user value. This study used three stages. 1) Needs and requirements of the product designers on the UX diagnosis platform were analyzed, 2) A UX diagnosis platform was developed, and 3) A case study was performed. As a result the UX diagnosis platform that consists of 109 questionnaires was developed. The proposed platform is useful for the designers to evaluate the UX of their products and clarify the weak points of the designs.

A Classification of Assistive Functions for People with Sensory and Physical Disabilities

( Joohwan Park ),( Sung H. Han ),( Hyun K. Kim ),( Heekyung Moon ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-

Assistive technologies bring numerous social and personal benefits to people with disabilities by encouraging them to participate in economic and social activities. This study aims to classify current assistive technologies by their functions and characteristics. The research scope is limited to assistive technologies for people with visual, hearing, and physical disabilities. A total of 508 assistive technologies were collected from academic literature (journals, conference proceedings, books, etc.) and commercial catalogs. A total of 18 assistive functions were extracted and defined from the collected assistive technologies. The assistive functions were classified into six categories based on the daily activities related to the assistive functions. Additionally, the characteristics and research trends of the assistive functions were identified. The results will help assistive device designers and researchers in gathering information about recent representative assistive technologies and their functions.

A classification of assistive functions for people with sensory and physical disabilities

Joohwan Park,Sung H. Han,Hyun K. Kim,Heekyung Moon 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5

Assistive technologies bring numerous social and personal benefits to people with disabilities by encouraging them to participate in economic and social activities. This study aims to classify current assistive technologies by their functions and characteristics. The research scope is limited to assistive technologies for people with visual, hearing, and physical disabilities. A total of 508 assistive technologies were collected from academic literature (journals, conference proceedings, books, etc.) and commercial catalogs. A total of 18 assistive functions were extracted and defined from the collected assistive technologies. The assistive functions were classified into six categories based on the daily activities related to the assistive functions. Additionally, the characteristics and research trends of the assistive functions were identified. The results will help assistive device designers and researchers in gathering information about recent representative assistive technologies and their functions.

문헌 조사를 통한 재활 게임 연구 현황 분석

Joohwan Park,Sung H. Han,Hyun K. Kim,Heekyung Moon 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.10

Background: 장애인의 재활 훈련에 대한 동기 부여를 위하여 게임을 활용하는 방안은 지속적으로 관련 학계에서 논의되어 왔다. 많은 숫자의 재활 게임 연구들이 재활 의학 및 컴퓨터 공학 분야에서 독립적으로 활발하게 수행되고 있다. 하지만 재활과 게임이라는 복합적인 주제를 다루는 학문의 특성 상 컴퓨터 공학, 재활 의학, 인간 공학 등 다수의 학계에서 독립적/산발적으로 연구가 수행되고 있다. Objective: 본 연구의 목적은 지체/뇌병변 장애인을 대상으로 한 재활 목적의 기능성 게임(이하, 재활 게임)과 관련된 연구의 현황과 흐름을 파악하는 것이다. Method: 문헌 조사를 통하여 기존 연구 문헌을 수집한 후 분석하였다. 국내·외 저널, 학회에서 발표된 문헌 및 학위 논문을 대상으로 지체/뇌병변 장애인을 위한 재활 게임 연구 문헌을 수집하였다. 수집된 문헌에서 언급 된 재활 게임을 (1) 대상 장애 유형; (2) 재활 게임 유형의 두 가지 기준에 따라 분류하였다. Results: 장애 유형에 따른 분류 결과, 뇌졸중으로 인한 뇌병변 장애인을 대상으로 한 재활 게임 개발 연구가 가장 많은 비중을 차지하였다. 개발된 재활 게임을 유형별로 분류한 결과, 스포츠, 액션/슈팅 등 단순하고 짧은 플레이 타임의 게임 장르가 가장 많은 비중을 차지하였다. 재활 게임에 활용된 센서들 가운데에선 발판/보드, 동작 인식 컨트롤러, 웹 캠 형태의 센서가 가장 많은 연구에서 활용되었다. Conclusion: 분석 결과, 기존 연구들이 특정 장애에 위한 게임 개발에 편중되는 현상을 보여 주었으며, 재활 게임의 장르의 다양성 역시 현저하게 부족하였다. Application: 본 연구의 결과물은 관련 연구자들이 재활 게임 연구의 현황을 파악하고 새로운 연구를 수행하는 과정에서 유용한 자료로 활용될 수 있을 것이다.

신체 및 인지 특성에 기반한 교통 약자의 보행 특성 정의

Joohwan Park,Sung H. Han,Jiyoung Kwahk,Dong Yeong Jeong,Mingyu Lee,Kyudong Park,Ju Hwan Kim,Hyeji Jang,Dawoon Jeong 대한인간공학회 2017 대한인간공학회 학술대회논문집 Vol.2017 No.4

Objective: The aim of this study is to define the walking characteristics of the mobility impaired based on their physical, sensory, and cognitive characteristics. Background: The mobility impaired are suffered by restricted and the limited range of mobility that caused by the limited infrastructure and hazardous environment. Nowadays, the Korean society settled the requirement of the enhanced infrastructures and environment. To enhance the accessibility of the mobility impaired, it is important to understand physical characteristics, sensory, and cognitive characteristics that could influence the walking behaviors or capabilities of the mobility impaired. Method: This study followed four stages to analyze the walking characteristics of the mobility impaired. (1) Characteristics of the mobility impaired were collected through literatures survey. (2) The collected characteristics were classified and categorized into physical, sensory, and cognitive characteristics of the mobility impaired. (3) The possible walking behaviors and problematic scenarios were investigated and defined into 20 walking characteristics of the mobile impaired. (4) The proposed walking characteristics of the mobility impaired were reviewed by domain experts through in-depth interviews. The walking characteristics were also supplemented. Results: The mobility impaired has 27 basic walking characteristics that based on the 8 physical characteristics and 20 sensory and cognitive characteristics. Conclusion: The 27 walking characteristics of the mobile impaired were defined. Theses walking characteristics were deduced based on their basic physical and sensory, and cognitive characteristics and validated through expert interviews. Application: The result could be useful to investigate possible problems and the sources of the problems of the mobility impaired may could encounter on their daily life. The drawn characteristics could be used to construct the representative personas of the mobile impaired to be considered by environment/infrastructure designers.

Case Study : Concept Development of Sensor based Context-Aware Wearable Devices

Joohwan Park,Sung H. Han,Bora Kang,Dong Yeong Jeong 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11

Objective: The aim of this case study is to implement the proposed idea generation process for new wearable devices. Background: Mobile and wearable devices are playing an important role in the modern society. As more mobile/wearable devices pervaded modern society, researchers and designers are trying to implement more intelligent, context-aware functions to reduce user’s inconvenience. A number of context-aware functions are integrated into mobile/wearable devices by implying sensor based context-aware technologies. Method: This case study followed four stages. (1) Idea generation scope and target application domain are defined. (2) User scenarios and needs are generated considering the user context like user’s task, environment. Abstract function ideas are designed to gratify each user"s need. A total of 339 abstract function ideas are generated. Each function was evaluated in terms of market size, attractiveness, and novelty by academic and industrial experts. As a result, 20 functions were selected in this stage. (3) Device ideas are developed based on the selected scenarios and function ideas. Feasible form factors and sensor technologies are explored and considered for each function idea. A total of 90 device idea are derived and evaluated by experts. As a result, two wearable device ideas are selected. (4) Detailed device concepts are developed from the selected device ideas and described. Feasible function ideas and function ideas that derived in the earlier stages were also considered and integrated into the final device concepts. Results: A total of two detailed wearable device concepts are derived based on the user contexts, application domains, feasible sensor technologies, and form factors. Application: The proposed process and the lessons learned from the case study might help designers of the wearable industries by enhancing the effectiveness of the idea/concept generation process.

문헌조사를 통한 스마트 기기 어플리케이션의 효용성 및 관련 요소 정의

Joohwan Park,Sung H. Han 대한인간공학회 2017 대한인간공학회 학술대회논문집 Vol.2017 No.11

The aim of this study is to investigate what determines utility of smart device’s applications. User experience (UX) is one of the most important concepts to be considered by application developers. However, studies on defining and measuring utility and value, a major part of UX, of software are still very difficult mission in ergonomics society. Studies on utility and value were collected from related domains and analyzed to define utility and related elements. Literatures about utility and value of the product and services were collected from Marketing, Financial engineering, Quality engineering, and User centered design domains. The utility of the smart device’s application was defined based on the literature. The proposed definition and literature analysis results might help researchers to understand the utility concept. The result might be helpful literature for development of evaluation technique for utility of smart device’s applications.

Aspirin prevents TNF-α-induced endothelial cell dysfunction by regulating the NF-κB-dependent miR-155/eNOS pathway: Role of a miR-155/eNOS axis in preeclampsia

Kim, Joohwan,Lee, Kyu-Sun,Kim, Ji-Hee,Lee, Dong-Keon,Park, Minsik,Choi, Seunghwan,Park, Wonjin,Kim, Suji,Choi, Yoon Kyung,Hwang, Jong Yun,Choe, Jongseon,Won, Moo-Ho,Jeoung, Dooil,Lee, Hansoo,Ryoo, Sun PERGAMON PRESS 2017 FREE RADICAL BIOLOGY AND MEDICINE Vol.104 No.-

<P><B>Abstract</B></P> <P>Preeclampsia is an inflammatory disease with endothelial cell dysfunction that occurs via decreased endothelial nitric oxide synthase/nitric oxide (eNOS/NO) activity. Aspirin reduces the incidence of hypertensive pregnancy complications. However, the underlying mechanism has not been clearly explained. Here, we found that tumor necrosis factor (TNF)-α, <I>microRNA (miR)−155</I>, and eNOS levels as well as endothelial redox phenotype were differentially regulated in preeclamptic patients, implying the involvement of TNF-α- and redox signal-mediated miR-155 biogenesis and eNOS downregulation in the pathogenesis of preeclampsia. Aspirin prevented the TNF-α-mediated increase in <I>miR-155</I> biogenesis and decreases in eNOS expression and NO/cGMP production in cultured human umbilical vein endothelial cells (HUVECs). Similar effects of aspirin were also observed in HUVECs treated with H<SUB>2</SUB>O<SUB>2</SUB>. The preventive effects of aspirin was associated with the inhibition of nuclear factor-κB (NF-κB)-dependent <I>MIR155HG</I> (<I>miR-155</I> host gene<B>)</B> expression. Aspirin recovered the TNF-α-mediated decrease in wild-type, but not mutant, eNOS 3′-untranslated region reporter activity, whose effect was blocked by miR-155 mimic. Moreover, aspirin prevented TNF-α-mediated endothelial cell dysfunction associated with impaired vasorelaxation, angiogenesis, and trophoblast invasion, and the preventive effects were blocked by miR-155 mimic or an eNOS inhibitor. Aspirin rescued TNF-α-mediated eNOS downregulation coupled with endothelial dysfunction by inhibiting NF-κB-dependent transcriptional <I>miR-155</I> biogenesis. Thus, the redox-sensitive NF-κB/<I>miR-155</I>/eNOS axis may be crucial in the pathogenesis of vascular disorders including preeclampsia.</P> <P><B>Highlights</B></P> <P> <UL> <LI> TNF-α, <I>miR-155</I>, and eNOS are differentially regulated in preeclamptic patients. </LI> <LI> Aspirin prevents TNF-α-mediated <I>miR-155</I> biogenesis and eNOS downregulation. </LI> <LI> Aspirin preserves vascular function by blocking NF-kB-mediated eNOS downregulation. </LI> <LI> Thus, the NF-kB/<I>miR-155</I>/eNOS pathway is crucial for the pathogenesis of preeclampsia. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>