• Asia pacific journal of information systems
• /
• 제29권2호
• /
• pp.181-202
• /
• 2019

The purpose of this study is to explore the effect of different types of simultaneous presentation (i.e., reviewer information, textual and visual content, and similarity between textual-visual contents) on review usefulness and review enjoyment in online restaurant reviews (ORRs), as they are interrelated yet have rarely been examined together in previous research. By using Latent Dirichlet Allocation (LDA) topic modeling and state-of-the-art machine learning (ML) methodologies, we found that review readability in textual content and salient objects in images in visual content have a significant impact on both review usefulness and review enjoyment. Moreover, similarity between textual-visual contents was found to be a major factor in determining review usefulness but not review enjoyment. As for reviewer information, reputation, expertise, and location of residence, these were found to be significantly related to review enjoyment. This study contributes to the body of knowledge on ORRs and provides valuable implications for general users and managers in the hospitality and tourism industries.

• Parasites, Hosts and Diseases
• /
• 제58권1호
• /
• pp.51-55
• /
• 2020

A 23-year-old Korean woman with a residence history in Kenya and Malawi for about 2 years presented with gross hematuria for 1 month. Blood tests were within normal range except eosinophilia. Asymmetrically diffuse wall thickening and calcification were observed at the urinary bladder on CT. Multiple erythematous nodular lesions were observed in the cystoscopy and transurethral resection was done. Numerous eggs of Schistosoma haematobium with granulomatous inflammation were observed in the submucosal layer of the bladder. The patient was diagnosed with schistosomiasis-related cystitis and treated with praziquantel (40 mg/kg/day) twice before and after transurethral resection. This case suggests that S. haematobium infection should be considered as a cause of hematuria in Korea when the patient had a history of traveling endemic areas of schistosomiasis.

• Osong Public Health and Research Perspectives
• /
• 제8권5호
• /
• pp.308-317
• /
• 2017

Objectives: We aimed to examine the effects of various leisure activities on cognitive impairment in young-old (aged 65-74 years) and old-old (aged ${\geq}75$ years) adults. Methods: In total, 10,279 elderly Korean individuals from the 2014 Korean National Survey on Older Adults' cohort were enrolled in our study. Cognitive impairment was assessed using the standardized score of the Mini-Mental State Examination for Dementia Screening, whereas leisure activities were recorded via self-reporting of the extent and type of leisure activity the subjects involved in over the past year. Multivariate logistic regression was used to assess the effect of leisure activities on cognitive impairment, while controlling for potential covariates. Results: The subjects were more likely to participate in cognitive activities than in non-exercise physical activities. After controlling for selected covariates, involvement in cognitive activities was found to be a significant predictor of cognitive impairment in both the groups, whereas involvement in non-exercise physical activities was not a predictor of cognitive impairment in individuals aged ${\geq}75$ years. Moreover, depressive symptoms, rural residence, and hearing difficulties were common predictors of cognitive impairment among elderly-Korean-individuals. Conclusion: Leisure activity involvement may help delay cognitive impairment, which is often concomitant with aging. Hence, an early intervention service may significantly benefit both young-old and old-old individuals.

• 한국환경보건학회지
• /
• 제39권4호
• /
• pp.322-334
• /
• 2013

Objectives: This study describes the results of a mass screening and secondary questionnaire conducted among sampled residents around Camp Carroll. Methods: The subjects were sampled based on Waegwan groundwater ingestion history via a primary health questionnaire survey. However, the study population included voluntary participants and there were no grounds for disqualification. Among the 1,033 residents, excluding people living outside Waegwan, 844 subjects age 30 and over were analyzed. History of physician-diagnosed disease (including detailed history of cancer), eating habits, drinking and smoking histories were queried through questionnaires. Health screening consisted of a blood pressure check and blood test (complete blood cell, liver enzyme, lipid, blood sugar test, etc.). Results: The proportion of abnormal gamma-glutamyltransferase levels was higher in the groundwater ingesting female group than the non-ingesting female group. The odds ratios of the ingested '1 to 9 years' and '10 years and over' groups were 3.09 and 0.87, respectively. Proportions of hypertension in males, abnormal serum triglyceride levels in all and in females, and abnormal serum high density lipoprotein cholesterol levels in males were higher in the '10 to 29-year' resident group than in the '1 to 9 year' group. However, there were no significant trends according to length of residence. Conclusions: Physician-diagnosed prevalence and laboratory test results are not different by histories of Waegwan groundwater ingestion and by length of residence. Even if there are partially significant differences, they do not tend to follow increases of exposure amount and trends.

• 대한지역사회영양학회지
• /
• 제23권6호
• /
• pp.475-487
• /
• 2018

Objectives: This study examined the consumption of Han-sik and its association with the years of residence in Korea and the socioeconomic status among Filipino immigrant women of the Filipino Women's Diet and Health Study (FiLWHEL). Methods: A total of 474 Filipino women married to Korean men were included in the analysis. Their dietary intake was assessed using a single-day 24-hour recall. The participants provided information on the demographics, socioeconomic, and health-related factors through face-to-face interviews. The generalized linear model and logistic regression model were used to examine the association between the socioeconomic status and consumption of Han-sik. Results: The mean age of the participants was 34.3 years old, and the average duration of residence in Korea was 8.2 years. Among 474 Filipino women, a total of 467 consumed Han-sik, with an average of 6.8 food items per day. The Han-sik foods that the participants consumed most frequently were rice, cabbage kimchi, mixed-grain rice, and fried eggs. The average ratio of Han-sik was 58.57%. The ratio of Han-sik showed no significant associations with the years of residence, years of living together with their husband, education levels, total annual family income, or linguistic competence of Korean. However, the ratio of Han-sik use was associated with cohabitation with parents-in-law; the odds ratio (95% confidence interval) was 2.41 (1.18-4.92, p-trend = 0.002) comparing the fourth quartile with the first quartile of the Han-sik ratio. Conclusions: Filipino immigrant women in the FiLWHEL study consumed a larger number of Han-sik than Philippine foods. In addition, cohabitation with their parents-in-law was associated with the consumption of Han-sik. Further epidemiologic studies will be needed to determine how the diet affects the health and wellbeing of immigrant women in Korea.

• Korean journal of health promotion
• /
• 제18권4호
• /
• pp.177-183
• /
• 2018

연구배경: 최근 이혼이나 별거의 증가로 한부모 가정이 증가하고 있다. 한부모와 사는 청소년에서 비만 위험이 높다는 연구 결과는 많지만, 함께 사는 부모의 성별에 따라 구분하여 분석한 연구는 없었다. 이에 저자들은 우리나라 청소년에서 부모와의 동거 형태에 따른 비만율의 차이를 알아보고자 하였으며, 한부모와 동거하는 가정은 아버지와 동거하는 가정과 어머니와 동거하는 가정으로 나누어 분석하였다. 방법: 본 연구는 2017년에 시행된 제13차 청소년건강행태 온라인조사에 참여한 59,602명을 대상으로 한 단면 연구이다. 온라인 설문을 통하여 신장, 체중, 부모와의 동거 형태, 현재 흡연, 현재 음주, 신체활동 실천, 아침식사 결식, 패스트푸드와 탄산음료 섭취, 스트레스와 우울감 경험, 가정의 경제적 상태 등을 조사하였다. 부모와의 동거 형태는 양 부모와 동거, 아버지와만 동거, 어머니와만 동거, 부모와 비동거로 분류하였다. 결과: 남학생에서는 어머니와만 동거가 비만(교차비 1.24, 95% 신뢰구간 1.09-1.40) 및 과체중(교차비 1.17, 95% 신뢰구간 1.03-1.34)의 높은 비율과 관련이 있었으나, 여학생에서는 아버지와만 동거가 비만(교차비 1.49, 95% 신뢰구간 1.23-1.82)의 높은 비율과 관련이 있었으며, 부모와 비동거는 비만(교차비 1.47, 95% 신뢰구간 1.13-1.91) 및 과체중(교차비 1.31, 95% 신뢰구간 1.00-1.70)의 높은 비율과 관련이 있었다. 결론: 본 연구는 한부모와 사는 가정에서의 자녀의 비만 위험 증가가 함께 생활하는 부모의 성별에 따라 차이가 있음을 보여주었다. 동성 부모와 동거하는 경우에는 자녀의 비만 위험이 증가하지 않았으나, 이성 부모와만 동거하는 경우에는 자녀의 비만 위험이 증가함을 보여주었다.

• Journal of Pharmaceutical Investigation
• /
• 제29권2호
• /
• pp.93-98
• /
• 1999

Semi-solid poly(ortho esters) (POE) were prepared to provide bioerodible carriers for sustained drug delivery systems of nifedipine in the treatment of cardiovascular disease. As the POE has viscous behavior at room temperature, a significant advantage of this polymer is that it can be injected without any surgical intervention. The POE was synthesized by a transesterification reaction between 1,2,6-hexanetriol and trimethyl orthoacetate and the nifedipine release from POE was studied in vitro. The release rate of nifedipine decreased with increasing the amount of nifedipine and the diethanolamine dispersed in the polymer. But the excess amounts, above 3%, of diethanolamine retarded the release of nifedipine. In vivo biocompatibility studies were carried out in rats with nifedipine loaded POE. Histopathological analysis showed that nifedipine loaded POE implants were well-tolerated by rats when used subcutaneously. In case of the rats implanted POE containing diethanolamine, tissue necrosis and inflammation were occured. Pharmacokinetic studies of nifedipine loaded POE implants were carried out in rabbits. In all cases, plasma concentrations of nifedipine were maintained over 15 ng/ml for at least 360 hours and biological half $life(t_{1/2})$ and mean residence time(MRT) were increased by addition of diethanolamine.

• Nuclear Engineering and Technology
• /
• 제47권6호
• /
• pp.746-755
• /
• 2015

To investigate the effect of hydrogen and oxygen contents on hydride reorientations during cool-down processes, zirconium-niobium cladding tube specimens were hydrogen-charged before some specimens were oxidized, resulting in 250 ppm and 500 ppm hydrogen-charged specimens containing no oxide and an oxide thickness of $0.38{\mu}m$ at each surface. The nonoxidized and oxidized hydrogen-charged specimens were heated up to $400^{\circ}C$ and then cooled down to room temperature at cooling rates of $0.3^{\circ}C/min$ and $8.0^{\circ}C/min$ under a tensile hoop stress of 150 MPa. The lower hydrogen contents and the slower cooling rate generated a larger fraction of radial hydrides, a longer radial hydride length, and a lower ultimate tensile strength and plastic elongation. In addition, the oxidized specimens generated a smaller fraction of radial hydrides and a lower ultimate tensile strength and plastic elongation than the nonoxidized specimens. This may be due to: a solubility difference between room temperature and $400^{\circ}C$; an oxygen-induced increase in hydrogen solubility and radial hydride nucleation energy; high temperature residence time during the cool-down; or undissolved circumferential hydrides at $400^{\circ}C$.

• 한국환경보건학회지
• /
• 제40권4호
• /
• pp.279-293
• /
• 2014

Objectives: Children are more susceptible to heavy metal toxicity than adults. The purpose of this study was to evaluate heavy metal concentrations in the blood of Korean preschoolers and investigate the association between metals in blood and related factors. Methods: A total of 512 subjects from 36 to 83 months of age were sampled. A questionnaire survey was performed and the levels of lead, mercury and cadmium were measured in the blood samples of all subjects. Their parents were interviewed in order to obtain information on basic characteristics, dietary patterns, socio-economic factors, and indoor/outdoor environment of the preschoolers. Multiple linear regression was used to analyze the association between the above factors and lead, mercury or cadmium concentrations. Results: The geometric mean concentrations of lead, mercury and cadmium in the blood were $1.45{\pm}1.58{\mu}g/dL$, $2.14{\pm}1.74{\mu}g/dL$ and $0.23{\pm}1.91{\mu}g/dL$, respectively. Results from multiple linear regression analysis showed that blood lead levels were associated with birth weight and paternal smoking status. Daily mercury intake from food and maternal education were also shown to influence mercury concentrations in blood. Also, blood cadmium concentrations were associated with maternal age and having a bus garage near the place of residence. Conclusion: This study suggests that smoking status, dietary patterns and the environmental status near the residence should be considered as important factors for preventable sources of heavy metal exposure in preschoolers.

• 대한불안의학회지
• /
• 제6권1호
• /
• pp.45-54
• /
• 2010

본 연구는 이천시에 거주하는 65세 이상의 인구를 대상으로, 우울증의 유병률과 자살경향성, 우울증과 자살경향성에 영향을 미치는 위험요인을 살펴본 연구이다. 전체적으로 우울증의 유병률은 28% 정도로 파악되어 실제로 65세 이상의 연령대에서 상당수의 노인들이 임상적으로 의미 있는 우울증을 경험하고 있는 것으로 관찰되었다. 또한 자살경향성은 전체 조사대상자의 약 20%에서 자살생각, 자살의도, 자살계획, 자해의도, 자살시도 중 한 가지 이상을 지난 한 달 동안 경험했던 것으로 나타났다. 거주 형태별로 구분하여 비교 분석한 결과, 혼자 생활하거나 시설에서 생활하는 노인들에서 동거가족이 있는 노인들보다 우울증의 유병률이 높고, 증상도 심한 것으로 나타났으며, 이들에게서 자살경향성 역시 높은 것으로 파악되어 이들 고위험군에 대한 보다 집중적인 우울증의 조기 발견 및 자살예방사업이 필요할 것으로 판단되었다. 위험요인 분석에서는 고령, 시설거주, 낮은 사회적 지지 수준은 우울증의 위험요인으로, 독거생활, 시설거주, 낮은 사회적 지지 수준, 두통의 기왕력은 자살경향성의 위험요인인 것으로 파악되었다.