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( Songyi Kim ),( Youngchoong Park ),( Jongwha Kim ),( Byoungha Park ),( Yongseong Kim ),( Seong Dong Kim ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
The aim of this study was to derive a virtual persona for each user and service situation expected based on UX(User eXperience) according to service profiling structure. As the UX index, KS-SQI (Korean Standard-Service Quality Index) widely used for qualitative service quality assessment was used. For quantitative indexes, emotional state (Pleasant-Unpleasant) based on physiological signals and performance timewere used. In the experiment, 8 tasks were carried out based on health park management scenario with 32 participants (8 males and 8 females in20-30s, 8 males and 8 females in 40-50s, mean age: 36.1±10.9). KS-SQI was examined by conducting a subjective questionnaire, and physiological signal data were collected at a sample rate of 200Hz by attaching PPG, GSR, and SKT sensors. The experimental analysis was performed on task #6 (task before exercise) and task #8 (task after exercise) with greater importance among 8 tasks, and the analysis was based on demographical indicators such as sex and age. As a result of analysis on sex, the mean KS-SQI was 80 points, ``Pleasant`` and 41.73 seconds for males and 76.38 points, ``Neutral`` and 41.93 seconds for females in task #6 (before exercise). In task #8 (after exercise), the KS-SQI was 79.56 points, ``Pleasant`` and 76.50 seconds for males and 74.94 points, ``Pleasant``and 74.13 seconds for females.
A New Radiation-Shielding Device for Restraining Veterinary Patients
Songyi Kim,Minju Lee,Miju Oh,Yooyoung Lee,Jiyoung Ban,Jiwoon Park,Sojin Kim,Uhjin Kim,Jaepung Han,Dongwoo Chang The Korean Society of Veterinary Clinics 2023 한국임상수의학회지 Vol.40 No.6
In veterinary medicine, most radiographic images are obtained by restraining patients, inevitably exposing the restrainer to secondary scattered radiation. Radiation exposure can result in stochastic reactions such as cancer and genetic effects, as well as deterministic reactions such as skin burns, cataracts, and bone marrow suppression. Radiation-shielding equipment, including aprons, thyroid shields, eyewear, and gloves, can reduce radiation exposure. However, the risk of radiation exposure to the upper arms, face, and back remains, and lead aprons and thyroid shields are heavy, restricting movement. We designed a new radiation-shielding system and compared its shielding ability with those of conventional radiation-shielding systems. We hypothesized that the new shielding system would have a wider radiation-shielding range and similar shielding ability. The radiation exposure dose differed significantly between the conventional and new shielding systems in the forehead, chin, and bilateral upper arm areas (p < 0.001). When both systems were used together, the radiation-shielding ability was better than when only one system was used at all anatomical locations (p < 0.01). This study suggests that the new radiation-shielding system is essential and convenient for veterinary radiation workers because it is a step closer to radiation safety in veterinary radiography.
Kim, Hyunji,Park, MinSeok,Park, Songyi,Jeong, Hoiwoun,Kim, Jungmin,Kim, Youhyun Nuclear Technology Pub 2013 Radiation protection dosimetry Vol.153 No.1
<P>With the introduction of digital radiography, patients undergoing radiographic procedures are subject to being overexposed to radiation. Therefore, it is necessary to estimate the absorbed organ dose and the effective dose, which are significant for patient health, along with body type. During chest radiographic examinations conducted in 899 patients for screening, the absorbed dose of the 13 major organs, the average whole-body dose, and two effective doses weighted by factors published in ICRP 60 and ICRP 103 were calculated on the basis of patient information such as height, weight and examination condition, including kilovolt potential, focus-skin distance and entrance surface dose (ESD), using a PC-based Monte Carlo program simulation. It was found that dose per unit ESD had a tendency to decrease with body mass index (BMI). In particular, the absorbed dose for most organs was larger at high voltages (140 kVp) than at low voltages (120 kVp, 100 kVp). In addition, the effective dose which was based on ICRP 60 and ICRP 103 also represented the same tendency in respect of BMI and tube voltage.</P>
Kim, Soojin,Lee, Songyi,Anjong, Tikum Florence,Jang, Ha Yoon,Kim, Ji-Yeong,Lee, Chiho,Park, Sungnam,Lee, Hye Jin,Yoon, Juyoung,Kim, Jinheung American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.50
<P>For the practical use of a photobioreactor for artificial photosynthesis, efficient visible light-absorbing materials have to link reduction and oxidation catalysts for an efficient energy flow. As a step toward this goal of an NADH regeneration system and enzymatic production of solar fuels from CO2, we report the synthesis of a new polydiacetylene compound that is covalently connected with [Ru(phen-NH2) (bpy)(2)](2+) (bpy =2,2'-bipyridine, phen =1,10-phenonthroline-5-amine). The [(bpy)(2)Ru(phen-NH-)]-polydiacetylene absorbed a wide range of visible light because of the presence of two chromophores, the Ru complex and polydiacetylene. The polyacetylene backbone was converted from blue to red by conformational changes under the catalytic reaction conditions in a buffer solution. The electron transfer from the photoexcited [ku(phen)(bpy)(2)](2+) to the polydiacetylene backbone was observed. In a visible light-driven photocatalytic NAD+ reduction by (cyclopentadienyl)Rh(bpy)(H2O)(2+) With [(bpy),Ru(phen-NH)]-polydiacetylene, NADH was regenerated, and the reactivity using Ru(bpy),(phen-NH)-polydiacetyleue was enhanced relative to control experiments using only [Ru(phen)(bpy)(2)](2+) or polydiacetylene. The consecutive carbon dioxide reduction coupled with formate dehydrogenase was carried out to utilize the in situ photoregenerated NADH catalytically. The catalytic condition using [(bpy),Ru(phen-NH)]-polydiacetylene also showed much higher reactivity than the controls.</P>