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( Sohyun Park ),( Stephen Onufrak ),( Cara Wilking ),( Angie Cradock ) 한국임상영양학회 2018 Clinical Nutrition Research Vol.7 No.2
We examined community-level characteristics associated with free drinking water access policies in U.S. municipalities using data from a nationally representative survey of city managers/officials from 2,029 local governments in 2014. Outcomes were 4 free drinking water access policies. Explanatory measures were population size, rural/urban status, census region, poverty prevalence, education, and racial/ethnic composition. We used multivariable logistic regression to test differences and presented only significant findings. Many (56.3%) local governments had at least one community plan with a written objective to provide free drinking water in outdoor areas; municipalities in the Northeast and South regions and municipalities with ≤ 50% of non-Hispanic whites were less likely and municipalities with larger population size were more likely to have a plan. About 59% had polices/budget provisions for free drinking water in parks/outdoor recreation areas; municipalities in the Northeast and South regions were less likely and municipalities with larger population size were more likely to have it. Only 9.3% provided development incentives for placing drinking fountains in outdoor, publicly accessible areas; municipalities with larger population size were more likely to have it. Only 7.7% had a municipal plumbing code with a drinking fountain standard that differed from the statewide plumbing code; municipalities with a lower proportion of non-Hispanic whites were more likely to have it. In conclusion, over half of municipalities had written plans or a provision for providing free drinking water in parks, but providing development incentives or having a local plumbing code provision were rare.
Ahn, Sohyun,Park, Kwangwoo,Kim, Jinsung,Lee, Ho,Yoon, Jeongmin,Lee, Eungman,Park, Sohyun,Park, Jeongeun,Kim, Juhye,Keum, Ki Chang Korean Society of Medical Physics 2016 의학물리 Vol.27 No.4
Generally, it is recommended that the dosimetric effect of carbon fiber couch should be considered especially for an intensity-modulated therapy with a large portion of monitor units from posterior angles. Even a flattening filter free (FFF) beam has been used for stereotactic body radiation therapy (SBRT), the effect of carbon fiber couch for FFF beam is not well known. This work is an effort to evaluate the dosimetric effect of carbon fiber couch for flattened and FFF beam of Elekta linac empirically. The absorbed doses were measured with Farmer type chamber and water-equivalent phantoms with and without couch. And differences of the absorbed doses between with and without couch defined as "couch effect". By comparing calculated dose in treatment planning system (TPS) with measured dose, the optimal density of couch was evaluated. Finally, differences on patient's skin dose and target dose by couch were evaluated in TPS. As a result, the couch effect for 6 and 10 MV flattened beam were -2.71% and -2.32%, respectively. These values were agreed with provided data by vendor within 0.5%. The couch effect for 6 and 10 MV FFF beam were -3.75% and -2.80%, respectively. The patient's skin dose was increased as 18.6% and target dose was decreased as 0.87%, respectively. It was realized that the couch effect of FFF beam was more severe than that of flattened beam. Patient's skin dose and target dose were changed by the couch effect.
Suyeon Sun,Jenny Park,Baek Sujin,Haejin Chung,Jung Bokmoon,Park Sohyun,Seunghun Baek,Eung-Kyo Suh 한국차세대컴퓨팅학회 2021 한국차세대컴퓨팅학회 학술대회 Vol.2021 No.11
The main research topic of this study is how much ‘opinion mining’ of online comments on specific keywords reflects actual public opinion. In detail, we compared and analyzed how much the results of sentiment analysis for comments by platform reflect the actual opinion poll results. We analyzed the most mentioned keywords by platform and by parking in the comments classified as positive, and the most mentioned keywords by platform and by parking in the comments classified as negative. As a result of the study, it was found that the results of the polls were similarly reflected in the order of the Naver News model, Naver News + YouTube model, and YouTube model. In addition, it was possible to find out keywords with high interest by positive/negative public opinion through positive/negative word cloud analysis by parking and platform.
Influence of Drying Conditions on the Wrinkling of Fabrics
Sohyun Park,Kirim Kim,Changsang Yun,박정희,심명희 한국섬유공학회 2020 Fibers and polymers Vol.21 No.12
Wrinkles are formed in fabrics because of mechanical action and the physicochemical effects of water and heatduring washing and drying processes. This study aims to identify the main drying conditions that affect the wrinkles byevaluating the smoothness appearance of various fabrics, under four different sets of drying conditions. It was found that thewoven fabrics that had a low degree of freedom of yarn movement wrinkled more easily than the knit fabrics. Furthermore,depending on the hydrophilicity of the fibers, the degree of wrinkling was influenced by the temperature and humidity duringthe drying process. In particular, synthetic fibers with low glass transition temperatures (Tg) wrinkled more significantly athigh drying temperatures. Wrinkles generated during the washing process could be partially removed by mechanical forceduring tumbling under the Heater and Heatpump(t) conditions. However, under the Heatpump(h) and Line Dry conditions,they tended to be fixed in drying processes with less or no applied mechanical force. Repeated washing and drying resulted inan increased degree of wrinkling in the hydrophilic laundry, particularly in the wool fabric, due to shrinkage and felting. Itcan be concluded that the drying temperature and mechanical force affect the formation of wrinkles. Wrinkle formation insynthetic fibers can thus be mitigated by controlling these factors, in consideration of the glass transition temperature of thefibers.
Solvation Dynamics by Coherence Period Resolved Transient Grating
Park, Sohyun,Park, June-Sik,Joo, Taiha American Chemical Society 2011 The journal of physical chemistry. A, Molecules, s Vol.115 No.16
<P>We report a third-order nonlinear time-domain method, coherence period (τ) resolved transient grating (TRTG), that gives accurate solvation dynamics free from population relaxation in a short data acquisition time. The validity of TRTG is established by theory and experiment. The TRTG signal is shown to follow the transition frequency correlation function by an analytic expression based on the response function theory for delta function pulses and by model numerical calculations including finite pulse durations. TRTG is demonstrated for two cyanine dyes IR144 and IR125 in methanol by using a diffractive-optics based four wave mixing apparatus. Solvation dynamics in methanol obtained from the TRTG are consistent with those reported previously confirming the validity of TRTG.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcafh/2011/jpcafh.2011.115.issue-16/jp108495t/production/images/medium/jp-2010-08495t_0004.gif'></P>
Park, Sohyun,Lee, Heeseung,Seo, Dong-il,Oh, Kwang-hwan,Hwang, Taik Gun,Choi, Bo Youl The Korean Nutrition Society 2016 Nutrition Research and Practice Vol.10 No.6
BACKGROUND/OBJECTIVES: This study was conducted to evaluate the feasibility of a sodium reduction program at local restaurants through nutrition education and examination of the health of restaurant owners and cooks.SUBJECTS/METHODS: The study was a single-arm pilot intervention using a pre-post design in one business district with densely populated restaurants in Seoul, South Korea. The intervention focused on improving nutrition behaviors and psychosocial factors through education, health examination, and counseling of restaurant personnel. Forty-eight restaurant owners and cooks completed the baseline survey and participated in the intervention. Forty participants completed the post-intervention survey. RESULTS: The overweight and obesity prevalences were 25.6% and 39.5%, respectively, and 74.4% of participants had elevated blood pressure. After health examination, counseling, and nutrition education, several nutrition behaviors related to sodium intake showed improvement. In addition, those who consumed less salt in their baseline diet (measured with urine dipsticks) were more likely to agree that providing healthy foods to their customers is necessary. This study demonstrated the potential to reduce the sodium contents of restaurant foods by improving restaurant owners' and cooks' psychological factors and their own health behaviors. CONCLUSIONS: This small pilot study demonstrated that working with restaurant owners and cooks to improve their own health and sodium intake may have an effect on participation in restaurant-based sodium reduction initiatives. Future intervention studies with a larger sample size and comparison group can focus on improving the health and perceptions of restaurant personnel in order to increase the feasibility and efficacy of restaurant-based sodium reduction programs and policies.