• Asian Pacific Journal of Cancer Prevention
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• 제17권8호
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• pp.3777-3783
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• 2016

Background: The aim of this study was to evaluate the incidence and mortality of stomach cancer, and its relationship with the Human Development Index (HDI) and its components in Asia in 2012. Materials and Methods: This ecological study wa conducted based on GLOBOCAN project of WHO for Asian countries. We assessed the correlations between standardized incidence rates (SIR) and standardized mortality rates (SMR) of stomach Cancer with HDI and its components using SPSS18. Results: A total of 696,231 cases (68.7% in males and 31.3% in females, ratio of 2.19:1) and 524,465 deaths (67.1% in men and 33.0% in women, ratio 2.03:1) were included in 2012. Five countries with the highest SIR of stomach cancer were Republic Korea, Mongolia, Japan, China and Tajikistan. Five countries with the highest SMR of stomach cancer were Mongolia, Tajikistan, Kyrgyzstan, Kazakhstan and China. Correlation between HDI and SIR was 0.241 (p = 0.106), in men 0.236 (p = 0.114) and in women -0.250 (p = 0.094). Also between HDI and SMR -0.250 (p = 0.871) in men -0.018 (p = 0.903) and in women -0.014 (p = 0.927). Conclusions: No significant correlation was observed between the SIR of stomach cancer, and the HDI and its dimensions, such as life expectancy at birth, mean years of schooling, and income level of the population.

• 상하수도학회지
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• 제34권4호
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• pp.251-258
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• 2020

Sewer deterioration models are needed to forecast the remaining life expectancy of sewer networks by assessing their conditions. In this study, the serious defect (or condition state 3) occurrence probability, at which sewer rehabilitation program should be implemented, was evaluated using four probability distribution functions such as normal, lognormal, exponential, and Weibull distribution. A sample of 252 km of CCTV-inspected sewer pipe data in city Z was collected in the first place. Then the effective data (284 sewer sections of 8.15 km) with reliable information were extracted and classified into 3 groups considering the sub-catchment area, sewer material, and sewer pipe size. Anderson-Darling test was conducted to select the most fitted probability distribution of sewer defect occurrence as Weibull distribution. The shape parameters (β) and scale parameters (η) of Weibull distribution were estimated from the data set of 3 classified groups, including standard errors, 95% confidence intervals, and log-likelihood values. The plot of probability density function and cumulative distribution function were obtained using the estimated parameter values, which could be used to indicate the quantitative level of risk on occurrence of CS3. It was estimated that sewer data group 1, group 2, and group 3 has CS3 occurrence probability exceeding 50% at 13th-year, 11th-year, and 16th-year after the installation, respectively. For every data groups, the time exceeding the CS3 occurrence probability of 90% was also predicted to be 27th- to 30th-year after the installation.

• Asian Pacific Journal of Cancer Prevention
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• 제17권4호
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• pp.2041-2047
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• 2016

Background: Liver cancer (LC) is the sixth world most common cancer and the second leading cause of cancer death. Due to the importance and necessity of awareness about the incidence and mortality of diseases to perform prevention programs, this study focused on data for LC and its relationship with the human development index (HDI) and its components in Asia in 2012. Materials and Methods: This ecological study was based on GLOBOCAN data for Asian countries. We assessed correlations between standardized incidence rates (SIR) and standardized mortality rates (SMR) of LC with HDI and its components using of SPSS18. Results: A total of 582,420 incident cases and 557,097 deaths were recorded in Asian countries in 2012. The five with the highest SIR were Mongolia, Lao PDR, Vietnam, Republic of Korea and Thailand and those with the highest SMR were Mongolia, Lao PDR, Vietnam, Cambodia and Thailand. A negative relation was observed between HDI and LC for SIR of 0.049 (P=0.748) and for SMR of 0.07 (P=0.645), with life expectancy at birth a positive relation for SIR of 0.061 (P=0.687) and a negative relation for SMR of 0.079 (P=0.603), with the average years of education a negative relation fo SIR of 0.476 (p=0.952) and for SMR of 0.032 (P=0.832), and with the country income level per person a negative relation for SMI of 0.11 (p=0.465) and for SMR of 0.113 (P=0.455). Conclusions: The incidence of LC is more in less developed and developing countries but statistically significant correlations were not found between standardized incidence and mortality rates of LC, and HDI and its dimensions.

• 노동경제논집
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• 제29권2호
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• pp.1-27
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• 2006

최근의 이민은 과거와 달리 숙련노동력이 주도하고 있으며 그 정도가 계속해서 커져가고 있다. 본 논문은 1990~2000년 사이에 발생한 세계 각국에서 OECD 국가로의 이민 흐름 결정요인을 숙련수준별로 분석하는 것을 그 목표로 한다. 이를 위해 최근 공개된 Doquier and Marfouk(2005)의 이민자료로부터 각국의 연평균 이민율을 계산하여 종속변수로 삼았고, 배출국과 유입국의 경제적 지표를 독립변수로 활용하여 횡단면 분석을 실시하였다. 분석 결과 유입국/배출국의 평균적 소득격차, 연쇄이민, 언어와 같이 기존 연구가 밝혀 낸 인구학적 경제적 요인이 고숙련 노동의 이민에도 작용하는 것이 확인되었다. 그러나 고숙련 노동력의 이민은 다른 숙련수준에 비해 배출국의 산업구조, 유입국에서의 숙련수준간 소득격차, 평균수명과 같이 경제구조의 발전 정도에 민감하게 반응하는 것으로 보인다. 특히 소득수준이 향상되면서 구조적 요인의 상대적인 중요성은 더 커진다는 점은 주목할 만하다. 그리고 이민율에 영어 사용이 미치는 영향 역시 고숙련 노동력에서 크게 나타나며, 카리브해와 서아프리카 지역 등에서는 지역적 특수성이 이민율을 높이는 작용을 하는 것으로 보인다. 또한 두뇌유출의 가장 큰 위협을 받는 것은 중간소득 집단에 속한 국가들인 것으로 보인다.

• Journal of Chest Surgery
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• 제22권6호
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• pp.1013-1024
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• 1989

One hundred and seventy two patients of primary lung cancer, confirmed by tissue diagnosis at the Dept. of Thoracic and Cardiovascular Surgery in Korea University Hospital between June 1973 and August 1988, were evaluated and restaged with New International TNM classification, and the actuarial survival rate was obtained using Kaplan-Meier equation. The results of analysis were as follows. 1. Male to female ratio was 3.8:1, and prevalent age groups were sixth and seventh decades [76.4 %]. 2. The most common subjective symptom was cough [55.2 %], and 67.4 % of all patients were visited to hospital less than 6 months of symptoms. 3. Positive rates for tissue diagnosis were 100% in open chest or metastatic lymph node biopsy, 80 % in mediastinoscopic biopsy, 60 % in pleural biopsy, 59 % in pleural fluid cytology, 36% in bronchoscopic biopsy, and 22 % in sputum cytology. 4. The order of frequency of cell type was squamous cell carcinoma [53.0%], adenocarcinoma [22.0 %], small cell carcinoma [14.5 %], and so on. 5. Operability and resectability were 44% and 62% respectively, but they were improved recently. 6. Open and closure was done in 44 % of operated patients, uni or bilobectomy in 38 % and pneumonectomy in 24 %. 7. Overall operative mortality rate was 2.6 %. 8. The order of frequency of stage level was S3b [42.0 %], S3a [25.1 %], S1 [15.6%], and so on. 9. Distant metastasis, i.e. stage 4, was noted in 9.5 % of cases, and the sites of frequency were bone, brain, skin, and so on. 10. Actuarial survival rate was 1 year 48.2%, 2 year 36.9%, 3 year 31.2%, and 5 year 20.8%. According to above listed factors, 5 year survival rate was highest in squamous cell carcinoma, lobectomized cases, stage 1, NO in TNM system, and resectable cases. But T factor in TNM system and radiation therapy in nonresectable cases did not show statistical significance in life expectancy.

• Advances in pediatric surgery
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• 제3권1호
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• pp.47-53
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• 1997

Accidental ingestion of caustic substance is one of the common problems among children around the world. Acid intake accounts for a mere 5% of all reported cases of corrosive ingestion in the West. Because of the esophageal sparing effect of acid, clinically significant esophageal involvement after acid ingestion occurs in only 6 to 20 percent of the instances. Despite effort of prevention, 7% to 15% of children sustaining caustic esophageal burns develop esophageal strictures. If balloon dilatation or bougie dilatation fails to resolve the esophageal strictures, successful outcome following replacement by colon or stomach has been reported in children. But the complications and morbidity following these operations are still relatively high. Seven patients with corrosive-acid induced esophageal strictures who were operated upon at the Department of Pediatric Surgery, Seoul National University Children's Hospital from 1991 to 1995 were reviewed. Primary resection and anastomosis was performed in all of 7 patients. The stricture involved short segments of the esophagus at the level of the lower cervical and the upper thoracic vertebra. The operations were approached through a left cervical incision or a left thoracotomy. In one patient, operative repair of anastomotic leakage was done, and three patients required re-resection of anastomotic strictures postoperatively, and one patient required a third operation(reversed gastric tube) due to an anastomotic stricture. The other anastomotic leaks, strictures or pulmonary complications were resolved with conservative treatment. In conclusion, primary resection and anastomosis of the esophagus was performed successfully on the 6 of 7 children with acid induced corrosive esophageal strictures. This approach is physiologic, especially in children who should have a long life expectancy, and recommended for the treatment of short-segment acid induced corrosive esophageal strictures.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.631-631
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• 2013

Battery has major drawbacks including its size and life expectancy, and environmental problem. As an alternative, energy harvesting is emerging as a potential solution to replace battery along with more energy-efficient IT devices. The idea of harnessing energy from our living environment is sustainable, semi-permanent, and eco-friendly. Also, unlike battery, energy harvester does not require much space to store energy. Therefore, energy harvesting can provide a better source of power for small, portable, and wireless devices. Among various ways of harvesting energy from our surroundings, triboelectricity is chosen due to its potential to be miniaturized, and efficient. Triboelectric effect occurs as two different materials with different polarity of charge separation come into contact through friction, and then become separated so that electric potential difference is achieved. In this research, such characteristic of triboelectricity is used as a way to convert ambient mechanical energy into electric energy.Series of recent researches have shown promising results that the triboelectric energy harvester can be simple and cost effective. However, sufficient electricity level required to operate mobile devices has not yet been achieved.In this research, our group focuses on the design and optimization of triboelectric energy harvesting device to enhance its output. By using maskless lithography to pattern Kapton film and silicon substrate, which is used as a mold for PDMS thin layer, and sputtering metal electrodes on each side, we fabricate and demonstrate different designs of triboelectric energy harvester that utilizes the contact electrification between a polymer thin film and a metal thin foil. In order to achieve optimized result, the output voltage and current are measured under diverse conditions, which include different surface structure and pattern, material, and the gap between layers.

• 한국조경학회지
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• 제23권3호
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• pp.167-176
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• 1995

The purpose of this study is to suggest objective basic data for park management proposal through the quantitative analysis of users' behaviors and satisfaction for the actual conditions of management in Moaksan provincial park. For this, users' behaviors and socio-ecnomic characteristics have been analyzed. Specifically, it attempts to investigate users' anticipation and degree of satisfaction applied Expectancy Theory by Likert scale. And users' satisfaction for the actual conditions of management had been analyzed by using the multiple regression. Results of this study can be summarized as follows ; From the aspect of utilization reality, the male usage was silighty higher than female usage, and the usage rate reality, the male usage was slighty higher than female usage, and the usage rate among the young and students such as university students also appeared slightly higher than the norm. Due to the fact, subject park had been provincial park, bus usage was predominant, and users' visit park 1 or 2 times a year. Generally, the value of users' post occupancy evaluation were higher than those of anticipated, and Use in night and facilities were lower. A sense of the season, dense of forest, beauty of skyline and a perspective view appeared as main explicatory variables having positive effects on the satisfaction level for the landscape. Amount of plant and shade were positive variables on the satisfaction and users' had dissatisfaction with trial damage. According to the multiple regression analysis, the major variables to the satisfaction for the actual condition of vegetation management were diversity, recovery of artificial injury.

• 디자인학연구
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• 제18권3호
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• pp.181-190
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• 2005

노인들의 수명 연장에 따른 노인의 여가생활을 위하여 정부는 다양한 서비스 및 시설 확충에 대한 계획안을 마련하여 실행하고 있으나, 아직 노인들의 욕구를 충족시키지 못하고 있다. 이것은 단기간에 양적 증가에만 치중하고 있어 수요자인 노인들의 특성과 행태를 고려한 수준 높은 노인복지시설은 거의 전무한 실정이다. 본 연구는 현재 노인복지회관이 실내환경에서 노인의 행태와 특성을 반영하여 디자인하고 있는가를 실내공간체크리스트를 통해 현황을 파악하고자 한다. 실내공간체크리스트를 위한 이론적 기초는 노인환경심리와 행태에 따른 관련 문헌과 디자인 측면에서의 유니버설디자인 자료를 분석하여 기초자료를 7가지 분석 기준안을 토대로 실내공간체크리스트를 제시하였다. 공간분류로는 공동공간과 개별서비스공간으로 분류하여 각 회관별로 실내공간체크리스트를 통하여 조사 분석하여, 광주광역시 각 노인복지회관 적용하여 노인의 행태 관련된 디자인 특성내용들을 추출하였다. 분석된 결과를 기반으로 하여 광주지역 뿐만 아니라 전국에서 노인복지회관 건립 시, 노인복지와 여가의 질을 향상 시켜줄 수 있는 실내공간을 조성하는데 있어 기초자료를 제공하고자한다.

• 한국IT서비스학회지
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• 제21권1호
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• pp.163-179
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• 2022

Two dominant phenomena in modern world; population ageing and digitalization, have led public sector organizations to heavily rely on B2C(Business-to-Consumer) mobile applications. Yet, fatal concerns and complaints have often been raised by the mobile application users, notably from social welfare sector. With the continual expansion of digital landscape as well as the growth of life expectancy, usage of mobile applications has become prevalent across the stakeholders involved in social welfare sector. 'Smart Long-Term Care (SLTC)', inter alia, is a primary example of such mobile applications, designed to support Long-Term Residential Care (LTRC) service. The main goal of SLTC is to serve more convenient and practical LTRC service for both caregivers and care receivers. To examine user satisfaction of SLTC mobile application, this study investigates existing challenges and means to improve user satisfaction. Hence, we conducted this study using two methods: in-depth interview and topic modeling. Interestingly, two research outcomes commonly indicated that 5 factors (stability, accessibility, usefulness, responsiveness, and ease of use) were found significant in affecting user satisfaction of SLTC. Our findings suggest that the aforementioned factors can be seen as potential causes of the genuinely low user satisfaction. Eventually, this work will be a stepping-stone to elevate the overall quality level of LTRC service along with the user satisfaction degree of SLTC mobile application.