Impact of electrical heating on effective thermal insulation of a multi-layered winter clothing system for optimal heating efficiency

Park, Huiju,Hwang, Soo-kyung,Lee, Joo-Young,Fan, Jintu,Jeong, Youngjin Emerald Group Publishing Limited 2016 INTERNATIONAL JOURNAL OF CLOTHING SCIENCE AND TECH Vol.28 No.2

<P>Purpose - The purpose of this paper is to investigate the impact of the distance of the heating unit from the body in a multi-layered winter clothing system on effective thermal insulation and heating efficiency. Design/methodology/approach - To identify changes in the thermal insulation and heating efficiency of electrical heating in different layers inside a winter clothing ensemble, a series of thermal manikin tests was conducted. A multi-layered winter ensemble with and without activation of a heating unit was tested on the thermal manikin under two different ambient temperature conditions (10 degrees C and -5 degrees C). Findings - Results show that the effective thermal insulation of test ensembles increased by 5-7 percent with the activation of the heating unit compared to that without the activation. The closer the heating unit to the body, the higher the effective thermal insulation was in both ambient temperature conditions. This trend was more significant at lower ambient temperature. Research limitations/implications - The results of this study indicate that providing electric heating next to the skin is the most effective in increasing effective thermal insulation and decreasing body heat loss in both ambient temperature (-5 degrees C and 10 degrees C). This trend was more remarkable in colder environment at -5 degrees C of ambient temperature as evidenced by sharp decrease in heating efficiency and effective thermal insulation with an increase in distance between the manikin skin and heating unit at -5 degrees C of ambient temperature compared to at 10 degrees C of ambient temperature. Practical implications - Based on the results, it is expected that proximity heating next to the skin, in cold environment, may reduce the weight and size of the battery for the heating unit because of the higher efficiency of electric heating and the potentially immediate perception of warmth supported by the greatest increase in effective thermal insulation, as well as the lowest heat loss that comes with activation of heating on the first layer in cold environment. Originality/value - The finding of this study provides guidelines to sportswear designers, textile scientists, sports enthusiasts, and civilians who consider electric heating benefits for improved thermal comfort and safety in cold environments, especially in the areas of outdoor and winter sports and in military service. The results of this study indicate that providing electric heating next to the skin is the most effective in increasing effective thermal insulation and decreasing body heat loss in both ambient temperature (-5 degrees C and 10 degrees C).</P>

Assessment of Firefighters’ needs for personal protective equipment

Huiju Park,Juyeon Park,Shu-Hwa Lin,Lynn M Boorady 한국의류학회 2014 Fashion and Textiles Vol.1 No.1

This study performed focus group interviews with 54 firefighters in four states in the United States to assess the needs for design of firefighters’ personal protective equipment. Firefighters’ responses indicate three major issues to be considered for improved mobility, comfort and safety: 1) consideration of human factors, 2) sizing and fit, and 3) integrity of protection in the interface between protective equipment and turnout ensemble. Ergonomic design issues were identified through firefighters’ responses about their limited mobility of the head and arms while wearing helmet and self-contained breathing apparatus (SCBA), restricted access to coat pockets, back pain and soreness while wearing SCBA. Sizing and fit issues such as the excessive length and bulkiness of glove fingers were identified as a major concern regarding fire gloves resulting in limited mobility and dexterity, negatively effecting firefighters’ work efficiency and safety. The integrity of protection in the interface between turnout ensemble, gloves and boots was reported as an important consideration for firefighter comfort, mobility and protection against heat hazards. Possible design solutions were also discussed.

의류학 연구 및 패션산업 현장에 도입되고 있는 3D 기술동향 및 적용사례 고찰

박희주 ( Huiju Park ),구수민 ( Helen Koo ) 한국의류학회 2018 한국의류학회지 Vol.42 No.1

This study reviewed emerging trends in 3D technology adopted in apparel design research and product development for rapid prototyping and effective evaluation of product performance. Based on a literature review, the authors discussed technical advantages, practical merits and limitations, applications, and on-going developmental efforts of the following methodologies focusing on 3D body scanning and 3D motion capture, and 3D virtual fit simulation technologies. Such data-driven technical approaches observed in recent apparel design research and industry practice are expected to increasingly be adopted in the field to improve consumers' satisfaction with functionality, aesthetics, and comfort of a wide range of apparel products that include daily wear, sport apparel and protective clothing.

Effectiveness of immersive technology-based education for undergraduate nursing students: A systematic review and meta-analysis

Subin Park,Huiju Shin,Hyo-eun Kwak,Jieun Lee,Hyun Joo Lee 한국간호과학회 2023 한국간호과학회 학술대회 Vol.2023 No.11

User Acceptance of a Light-Emitting Diode Vest for Police Officer

Han, Hyunjeong,Park, Huiju,Jeon, Eunkyung The Society of Fashion and Textile Industry 2013 한국의류산업학회지 Vol.15 No.5

This study aims to suggest practical considerations for designing protective clothing with increased visibility that will have higher user acceptance by law enforcement officers. Light-emitting diode(LED) patrol vests were visually and structurally assessed, and 125 police officers' responses from surveys about user acceptance of the vest were analyzed. The current LED patrol vest was designed for enhanced safety of police officers by increasing visibility in the dark. However, the user acceptance rate of the LED patrol vest indicates low use of and low satisfaction with the vest despite its enhanced safety features. In particular, differences in materials, design, functionality of the pockets and size of the vest depending on the hours worked, were statistically significant. The police officers' responses suggest areas of improvement in design, materials, ease of movement, size and functionality. Key issues include 'tactile discomfort'; 'impeded vision from the glare of the LED'; 'frequent malfunctions of the LED'; 'impossible repair of the broken LED units'; 'no user feedback'; 'inconvenient to replace batteries'; 'brittle materials' and 'unpleasing look'. To increase user acceptance, designer should incorporate context-awareness, a convenient user interface, a modular design approach, first responders' self-image as public servants in relation to their aesthetic perspectives of their uniforms, and scientific evaluation of the effectiveness of the intended functions of the clothing. Suggested implications for designing the LED patrol vest can be applied to designing other functional/protective clothing for intended end users with special needs.

User Acceptance of a Light-Emitting Diode Vest for Police Officer

( Hyunjeong Han ),( Huiju Park ),( Eunkyung Jeon ) 한국의류산업학회 2013 한국의류산업학회지 Vol.15 No.5

This study aims to suggest practical considerations for designing protective clothing with increased visibility that will have higher user acceptance by law enforcement officers. Light-emitting diode(LED) patrol vests were visually and structurally assessed, and 125 police officers` responses from surveys about user acceptance of the vest were analyzed. The current LED patrol vest was designed for enhanced safety of police officers by increasing visibility in the dark. However, the user acceptance rate of the LED patrol vest indicates low use of and low satisfaction with the vest despite its enhanced safety features. In particular, differences in materials, design, functionality of the pockets and size of the vest depending on the hours worked, were statistically significant. The police officers` responses suggest areas of improvement in design, materials, ease of movement, size and functionality. Key issues include ‘tactile discomfort’; ‘impeded vision from the glare of the LED’; ‘frequent malfunctions of the LED’; ‘impossible repair of the broken LED units’; ‘no user feedback’; ‘inconvenient to replace batteries’; ‘brittle materials’ and ‘unpleasing look’. To increase user acceptance, designer should incorporate context-awareness, a convenient user interface, a modular design approach, first responders` self-image as public servants in relation to their aesthetic perspectives of their uniforms, and scientific evaluation of the effectiveness of the intended functions of the clothing. Suggested implications for designing the LED patrol vest can be applied to designing other functional/protective clothing for intended end users with special needs.

What do firefighters desire from the next generation of personal protective equipment? Outcomes from an international survey

LEE, Joo-Young,PARK, Joonhee,PARK, Huiju,COCA, Aitor,KIM, Jung-Hyun,TAYLOR, Nigel A.S.,SON, Su-Young,TOCHIHARA, Yutaka National Institute of Industrial Health 2015 Industrial health Vol.53 No.5

<P>The purpose of this study was to investigate smart features required for the next generation of personal protective equipment (PPE) for firefighters in Australia, Korea, Japan, and the USA. Questionnaire responses were obtained from 167 Australian, 351 Japanese, 413 Korean, and 763 U.S. firefighters (1,611 males and 61 females). Preferences concerning smart features varied among countries, with 27% of Korean and 30% of U.S. firefighters identifying ‘a location monitoring system’ as the most important element. On the other hand, 43% of Japanese firefighters preferred ‘an automatic body cooling system’ while 21% of the Australian firefighters selected equally ‘an automatic body cooling system’ and ‘a wireless communication system’. When asked to rank these elements in descending priority, responses across these countries were very similar with the following items ranked highest: ‘a location monitoring system’, ‘an automatic body cooling system’, ‘a wireless communication system’, and ‘a vision support system’. The least preferred elements were ‘an automatic body warming system’ and ‘a voice recording system’. No preferential relationship was apparent for age, work experience, gender or anthropometric characteristics. These results have implications for the development of the next generation of PPE along with the international standardisation of the smart PPE.</P>

연구논문 : 소방용 방화복 및 방화 장비에 따른 상반신 관절 각도의 동작 범위 연구

김선영 ( Seonyoung Kim ),박희주 ( Huiju Park ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.4

This study analyzed the range of motion of upper body in different configurations of firefighters’ protective clothing and equipment. The purpose of this study was to understand the influence of firefighters’ protective clothing and equipment over upper body motion in order to improve design of firefighters’ protective clothing and equipment. 12 firefighters’ upper body range of motion was analyzed while performing standing and walking trials in five different garment configurations including turnout ensemble, fire boots and the self-contained breathing apparatus. Analysis of upper body range of motion included spinal joints of L5S1, L4L3, T1C7, and C1Head. During standing trials, garment configurations caused a significant difference in range of motions at joints of L5S1, L4L3, T1C7, and C1Head. Analysis on the mean of range of motions at L5S1 and L4L3, showed that firefighters’ waist bent forward significantly to a greater extent while they wore a self-contained breathing apparatus. A significantly increased range of motion was found for T1C7 and C1Head while carrying a self-contained breathing apparatus, which indicated an increase in the extension of the trunk and neck backward to stand upright and look squarely. A significant difference in range of motion was also found for L5S1 and L4L3 during walking trials.

Collegiate female athletes’ body image and clothing behaviors

Mary Claire Nemeth,Huiju Park,Jane Mendle 한국의류학회 2020 Fashion and Textiles Vol.7 No.1

This study investigated the body image experiences unique to collegiate female athletes in relation to their apparel wear. Female athletes (n = 36) participated in interview sessions, 3D body scanning, and photography of garment fit, and the Multidimensional Body-Self Relations Questionnaire (MBSRQ). Through Qualtrics, the MBSRQ was distributed to female college students nationwide, to obtain a larger participant pool (Lean sport athletes (n = 36), non-lean sport athletes (n = 42) and non-athletes (n = 101). Results indicated that both sports groups were most influenced by sport specific body ideals. Correlation of body image and athletic uniforms was more influenced by the fit of the uniform than by the categorization of the sport. Both lean and non-lean sport group participants expressed dissatisfaction in pant fit. 3D body scans revealed similar body proportions and shape between sports groups. MBSRQ results indicated no significant difference between sports groups but higher body image scores in comparison to non-athletes.

Efficient, Solvent-Free, Multicomponent Method for Organic-Base-Catalyzed Synthesis of β-Phosphonomalonates

Kalla, Reddi Mohan Naidu,Park, Huiju,Lee, Hye Ri,Suh, Hongsuk,Kim, Il American Chemical Society 2015 ACS combinatorial science Vol.17 No.11