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손수영 한국의류산업학회 2019 한국의류산업학회지 Vol.20 No.2
This study analyzed and compared wearer mobility for different types of clothing that also included the potential to develop firefighter station uniforms using range of motion (ROM) and electromyography (EMG). This study focused on a comparison of wearer mobility affected by different materials and shapes of the station uniforms worn under firefighter turnout gear. Japanese standard uniform (UNI), stretch-wear (ST), and compression-wear (CP) were used as station uniforms for the experiment. This study analyzed wearer movements and quantified ROM and EMG. In addition, the subjective evaluation of wearer mobility and comfort were assessed for comparisons. Nine healthy male students participated in the experiment. Wearer mobility was analyzed using ROM and EMG data obtained by measuring five motions; in addition, subjective evaluations were also obtained. As compared with the standard station uniform, ROM increased 6.8% and 7.2% due to stretch-wear and compression-wear. The benefits of wearing stretch material or compression material to improve muscle performance (such as reduced percent of maximum voluntary contraction) were not proven. Differences between materials and designs influenced subjective wearer comfort. In particular, the wearing of compression materials was shown best in terms of wearer comfort that may also allow greater wearer mobility.
Micromesh carbon nanosheet electrodes fabricated by phase-separation of immiscible polymer blends
손수영,여준석,정건영,이성호,조한익 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-
We adopt micromesh structure in carbon nanosheets (M-CNS) fabricated by phase-separation of immiscible polyacrylonitrile/poly(methyl methacrylate) blend precursors to improve their properties as a transparent conductive electrode. The facile approach without any time-consuming patterning processes can improve trade-off between sheet resistance and optical transmittance of conventional CNS. The M-CNS exhibits improved sheet resistance of ∼50% without compromising optical transmittance, leading to a high power conversion efficiency of ∼2.07% for M-CNS electrode-based organic photovoltaics.
손수영,Satoshi Muraki,Yutaka Tochihara 한국의류학회 2022 Fashion and Textiles Vol.9 No.1
This study aimed to ascertain the appropriate test methods for the investigation of the efect of personal protective equipment on mobility of frefghters. Nine male volunteers performed a physical performance test (crawl, obstacle course, side-to-side jumps, heavy-object drag, and step-ups), functional balance test (functional reach, timed up and go, and wooden plank time), range of motion test, and subjective evaluation under four clothing conditions with diferent weights and combinations of personal protective equipment. The results showed that physical performance, functional balance ability, and joint angles signifcantly declined with increased weight of personal protective equipment. On subjective evaluation, wearing heavy personal protective equipment increased perceived exertion and discomfort on movement. Our results proved that some of our test methods, including the obstacle course, side-toside jumps, functional reach, timed up and go, range of motion test, and subjective evaluation, can be used to examine the mobility of personal protective equipment wearers. The fndings of this study provide an efective guide for researchers and frefghters regarding the evaluation of mobility with personal protective equipment, as well as for manufacturers in the development of enhanced, comfortable personal protective equipment.
손수영 한국생활환경학회 2018 한국생활환경학회지 Vol.25 No.5
This study aimed to investigate the variation in wearer mobility indicated by the range of motion (ROM) and performance of muscles while wearing firefighter protective clothing (FPC). The present study regarded the effects of wearing FPC fire jacket and pants, which form part of FPC, as objective numerical values. Wearer mobility was analyzed by ROM and electromyography (EMG) data, those were obtained by analyzing all experimental motions (shoulder flexion/ extension, shoulder adduction/abduction, shoulder rotation, hip flexion/extension, and hip adduction/abduction). The ROM and EMG of nine participants were measured using a 3D Motion Analysis system while they wore FPC or not. The EMG data were analyzed to determine the percentage of maximum voluntary contraction. This study showed that wearing FPC weighing three kilograms significantly decreased ROM (12.5 ± 2.9 %). The decrease in ROM was attributed to the pressure and weight of the FPC. Additionally, the results of EMG occurred by wearing FPC were not demonstrated when comparing with and without wearing FPC. Results of the present study showed that wearing FPC in general decrease the wearer’s mobility.
손수영,여준석,정건영,조한익,이성호 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
We adopted micromesh structure in carbon nanosheets (M-CNS) via phase-separation of immiscible polyacrylonitrile/poly(methyl methacrylate) blend precursors to improve their properties as a transparent conductive electrode. The facile approach without any time-consuming patterning processes can overcome the tradeoff between sheet resistance and optical transparency of the conventional CNS. The M-CNS exhibited the improved sheet resistance of ~ 50% without compromising the optical transparency, leading to a high power conversion efficiency of ~ 2.07% for an M-CNS electrode-based organic photovoltaics.
Micromesh carbon nanosheet electrodes fabricated by phase-separation of immiscible polymer blends
손수영,조한익 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Transparent conductive electrode (TCE) is one of the necessary components in optoelectronic devices. However, as the demand for cost-effective, lightweight, and flexible electronic devices increases, conventional TCE materials based on metal oxides have several problems such as scarcity of indium and brittleness. Therefore, it is required to develop the next-generation TCE materials. In this point of view, we previously developed highly conducting carbon nanosheet (CNS) through simple solution-processing of polymeric carbon precursors. However, there is still a need to improve electrical and optical properties for a wide range of applications of CNS electrodes. In this work, we developed CNS with micromesh structure to improve TCE characteristics of the CNS via phase-separation of immiscible blend precursors. The facile approach without any-time consuming patterning processes can improve trade-off between sheet resistance and optical transmittance of conventional CNS.
Accelerating the stabilization of polyacrylonitrile fibers by UV irradiation
손수영,조아영,정건영,정용식,이성호 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.73 No.-
Commercial polyacrylonitrile (PAN)fibers, widely used as carbonfiber precursors, were treated withultraviolet (UV) light without any photo-initiators and its effects on the structural changes of PAN wereinvestigated. Easily accessible UV irradiation produced free radicals by breaking the C H bonding inPAN, leading to reducing cyclization temperature and activation energy. Dynamic mechanical analysisindicated a decrease in storage modulus of PANfibers with increasing UV irradiation time below glasstransition temperature. It is suggested that UV irradiation and the subsequent thermal treatment couldoffer an efficient stabilization by reducing the cyclization temperature and process time.
손수영(Su Young Son),정경선(Kyung Sun Jung) 한국일러스아트학회 2002 일러스트레이션학 연구 Vol.10 No.-
Mixed historical, human, and religious elements have an influence on life and style. The style means that mirror of that-times an esthetic from of expression. The stimulating motivation of creation has been develop with religious, social background and big events of a period. The concept this thesis is about present possibilities of new trend between present design and develop and change of historical background.