• 환경영향평가
• /
• 제7권1호
• /
• pp.49-61
• /
• 1998

Zoning areas within national parks in Korea are classified into Natural Preservation Zone(NPZ). Natural Environment Zone(NEZ), Settlement Zone(SZ) and Mass Facility Zone(MFZ) based on the Natural Park Act Large-scale development which might cause permanent destruction of natural resources are being done in NEZ which covers 90% of the total natural park area. Thus it is necessary to examine National Park Act which refers the authorized criteria and development activities of NEZ. However, the current environmental impact statement(EIS) does not cover the full impact of the development inside the national park area. Based on these concepts, the study examines the appropriate resources to distinguish the NPZ and NEZ in Mt. Teogyu National Park, then compare the distribution of resource characteristics between two area by using GIS. Through this study, the conclusions are as follows; (1) In terms of scenic resource analysis, the current NPZ does not meet the criteria on the National Park Act Rather, most of the resources which should be located within the NPZ are located within the NEZ. (2) In terms of elevation analysis, Mt. Teogyu National Park, most of NPZ are located on high altitude which is more than l,200m above the mean sea level. Therefore, it shows the elevation is the only criteria for distinguishing NPZ and NEZ. (3) In terms of Degree of Green Naturality(DGN), the second forest areas, the eighth grade of DGN in Mt. Teogyu National Park are distributed much more in the NEZ than NPZ. (4) After examining five factors - scenic resources, elevation, slope and DGN, vegetation- it was found out that zoning of Mt. Teogyu National Park is not adequatly designated. Zoning of national parks should be accomplished based on the precise inventory of the current resources.

• Journal of Korean Society for Atmospheric Environment
• /
• 제15권E호
• /
• pp.17-28
• /
• 1999

Gas-liquid contact tests above a perforated-plate were conducted with air and water at flooding gas-flow conditions in order to study two-phase flow characteristics in a limestone-gypsum SO2 absorber. Gas layers were in the form of air pockets and confined to the limited areas around each duct pipe, while the remaining tary area were in the wet condition. The liquid above the tray was always in the flooded and even fluidized conditions at gas flows over the range studied, although vigorous bubbly or churn-turbulent two-phase regime was only observed in the immediate vicinity of the gas hole exit at low gas loads. The froth zone was extremely active to provide intimate contact between gas and liquid so that the necessary mass transfer operation can take place, which is the primary purpose of high-performance SO2 absorbers. Howefer, the absorber $\Delta$P was 250mmH2O for the initial water level at 150mm, which is an important issue to be resolved for economical operation of the SO2 absorber. It was seen in the liquid level-and gas flow-transient tests that changes in the absorber liquid inventory were much more pronounced for intimate gas-liquid contact than changes in the gas flow. Based on the 4- and 8-duct pipe test results, grouping the duct pipes near the center of the test tray seemed to promote better recirulation of liquid from gas-liquid contact zone back to the reaction tank so that the absorbed SO2 can be neutralized.

• 한방비만학회지
• /
• 제10권1호
• /
• pp.1-16
• /
• 2010

Objectives The clinical trial was designed to investigate the safety and effects of Bofu-tsusho-san extracts on the change of the weight, body compositions, serum in obese patients. Methods This study was a 4-weeks, double blind, comparative clinical trial. Eligible subjects had a body mass index(BMI) greater than $25\;kg/m^2$ and waist circumference(WC) longer than 85 cm in woman or 90 cm in man. Among 38 subjects, 36 subjects were randomized either to Bofu-tsusho-san or placebo. After 4 weeks of treatment, we measured anthropometric factors(weight, height, WC, BMI etc.), abdominal fat area by CT scanning, serum lipid(total cholesterol(TC), triglyceride(TG), HDL cholesterol, LDL cholesterol), blood level of variety(glucose, adiponectine, leptin, C-reactive protein(CRP) etc.), blood pressure(BP). Adverse events also evaluated. Results BMI, BP, TG, CRP were reduced and weight, WC, score of KOQOL(Korean version of obesity-related QOL scale), SRI(Stress response inventory) were significant changed in Bofu-tsusho-san. But there were no considerable difference between Bofu-tsusho-san and placebo. there were no serious adverse events in either group. Conclusion There were limitations in this study that it conducted within a short period of 4 weeks. but its weight and WC loss effect was significant and it had few adverse events.

• 한국유체기계학회 논문집
• /
• 제17권6호
• /
• pp.104-108
• /
• 2014

The recent Fukushima nuclear power plant accidents shows that the core make up at high RCS pressure condition is very important to prevent core melting. The core make up flow at high pressure condition should be driven by gravity force or passive forces because the AC-powered safety features are not available during a Station Black Out (SBO) accident. The reactor Coolant System (RCS) mass inventory is continuously decreased by releasing steam through the pressurizer safety valves after reactor trip during a SBO accident. The core will be melted down within 2~3 hours without core make up action by active or passive mode. In the new design concept of a Hybrid Safety Injection Tank (Hybrid SIT) both for low and high RCS pressure conditions, the low pressure nitrogen gas serves as a charging pressure for a LBLOCA injection mode, while the PZR high pressure steam provides an equalizing pressure for a high pressure injection mode such as a SBO accident. After the pressure equalizing process by battery driven initiation valve at a high pressure SBO condition, the Hybrid SIT injection water will be passively injected into the reactor downcomer by gravity head. The SBO simulation by MARS code show that the core makeup injection flow through the Hybrid SIT continued up to the SIT empty condition, and the core heatup is delayed as much.

• 한국식품영양학회지
• /
• 제19권2호
• /
• pp.111-125
• /
• 2006

This quantitative study was conducted to examine the relationship between weight control behaviors and disordered eating patterns in some university students. This study used a cross-sectional study design. A total of 347 students from three universities participated in this study (88 male and 259 female) Eating disorders were assessed using the Eating Attitudes Test (EAT-26); a score of =20 identifies individuals who likely have an eating disorder, including anorexia nervosa and bulimia nervosa. A score for healthy dietary behaviors was obtained by self-assessment on a healthy diet scale (20-item questionnaire), and the severity of any state-trait anxiety was calculated by the state-trait anxiety inventory (40-item questionnaire). In the analyzed results, the percentage of participants with experience of weight control was 58% in male and 73% in female. The subjects with a high risk of an eating disorder (score of =20 of EAT-26) were 44.3% ($mean{\pm}S.D;\;18.9{\pm}13.4$) of the males, and 57.9% ($mean{\pm}S.D;\;23.2{\pm}11.6$) of the females. Higher Body Mass Index (BMI) was significantly related with an increased risk for an eating disorder in females, but not in males. In the group who had attempted weight control of all types, there was a severe risk of an eating disorder. Increased eating disorder risk was significantly related with weight control behaviors such as a higher number of attempts at weight control, having used medication, having experienced side effects, and having experienced disease for both sexes. Therefore, the results of this paper showed that detrimental behaviors of weight control are connected to an increased risk of eating disorders. Consequently, education regarding the correct, behaviors of weight control is necessary to prevent eating disorders in adolescents.

• Asian Journal of Atmospheric Environment
• /
• 제5권1호
• /
• pp.41-46
• /
• 2011

The port of Busan is the fifth busiest container port in the world in terms of total mass of 20-foot equivalent units transported. Yet no attempts have been made to estimate the greenhouse gas (GHG) emissions from the port of Busan by accounting for all port-related activities of the various transportation modes. With these challenges in mind, this study estimates the first activity-based GHG emissions inventory in the port of Busan, which consists of four transportation modes: marine vessels, cargo-handling equipment, heavy-duty trucks, and railroad locomotives. The estimation results based on the most recent and complete port-related activity data are as follows. First, the average annual transportation GHG emission in the port of Busan during the analysis period from 2000 to 2007 was 802 Gg $CO_2$-eq, with a lower value of 773 Gg $CO_2$-eq and an upper value of 813 Gg $CO_2$-eq. Second, the increase in the transportation-related GHG emissions in the port of Busan during the analysis period can be systematically explained by the amount of cargo handled ($R^2$=0.98). Third, about 64% of total GHG emissions in the port of Busan were from marine vessels because more than 40% of all maritime containerized trade flows in the port were transshipment traffic. Fourth, approximately 22% of the total GHG emissions in the port of Busan were from on-road or railroad vehicles, which transport cargo to and from the port of Busan. Finally, the remaining 14% of total GHG emissions were from the cargo handling equipment, such as cranes, yard tractors, and reach stackers.

• 대한예방한의학회지
• /
• 제13권2호
• /
• pp.65-76
• /
• 2009

This study was to examine of physical and psychological traits to sasang constitution in college students. The subjects in this study were 114 people, who were consists of 35 persons of Taeeumin, 34 persons of Soyangin and 45 persons of Soeumin. We were analyzed psychological trait with the Myers-Briggs Type Indicators(MBTI) and State-Trait Anxiety Inventory(STAI) according to sasang constitution. Also, We were analyzed physical trait with the Body Mass Index(BMI) according to sasang constitution. Each sasang constitutions personality type showed significantly differences only in the extraversion and introversion(p=0.012). In the relationship of BMI, Taeeumin showed bigger BMI compared to others (p<0.001). As a result of logistic regression analysis, Soyangin was higher in the extraversion(odds ratio[OR], 3.48 ; 95% confidence interval [95% CI], 1.18-10.26) compared with Taeeumin. Also, each sasang constitutions showed significantly differences in trait-anxiety(p=0.047). The score of trait-anxiety in Soeumin was significantly higher than that in Taeeumin. The limitation of this study was that particular samples could not represent the population, because the students from one college had participated in this study. In the future, we will perform this study in general population. At the same time, we will also develop approaches considering physical and psychological aspects depending on the types of constitution in the management of subjects.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.817-819
• /
• 2003

Land degradation is a crucial issue in mountainous areas and is manifested in a variety of processes. For its assessment, application of existing models is not straightforward. In addition, data availability might be a problem. In this paper, a procedure for land degradation assessment is described, which follows a four-step approach: (1) detection, inventory and mapping of land degradation features, (2) assessing the magnitude of soil loss, (3) study of causal factors, and (4) hazard assessment by applying decision trees. This approach is applied to a case study in the Middle Mountain region of Nepal. The study shows that individual mass movement features such as debris slides and slumps can be easily mapped by photo interpretation techniques. Application of soil loss estimation models helps get insight on the magnitude of soil losses. In the study area soil losses are higher in rainfed crops on sloping terraces (highest soil loss is 32 tons/ha/yr) and minimal under dense forest and in irrigated rice fields (less than 1 ton/ha/yr). However there is high frequency of slope failures in the form of slumps in the rice fields. Debris slides are more common on south-facing slopes under rainfed agriculture or in degraded forest. Field evidences and analysis of causal factors for land degradation helps in building decision trees, the use of which for modelling land degradation has the advantage that attributes can be ranked and tested according to their importance. In addition, decision trees are simple to construct, easy to implement and very flexible in adaptations.

• Journal of Obesity & Metabolic Syndrome
• /
• 제26권1호
• /
• pp.52-60
• /
• 2017

Background: This study investigated the relationship between depressive symptoms and physical fitness, obesity indices, and vitamin D status in office workers. Methods: The subjects were 514 adults with more 30 years of experience as office workers in the city of Seoul. Lifestyle risk factors, obesity indices, physical fitness, and serum vitamin D levels were assessed with a standardized protocol. The Beck Depression Inventory (BDI) was used to assess depression status. Vitamin D status was assessed by measuring serum 25-hydroxyvitamin D concentrations. Based on the BDI scores, participants were classified into no depression (ND, $BDI{\leq}9$), mild depression (MiD, $10{\leq}BDI{\leq}15$), and moderate depression (MoD, $16{\leq}BDI{\leq}23$) groups. Results: Compared with the high cardiorespriatory fitness group, the low cardiorespiratory fitness (men OR=2.618, women OR=1.596) an middle cardiorespiratory fitness group (men OR=1.256, women OR=1.110) had significantly higher odds ratio for having depressive symptoms, even after adjustment for age, hypertension, diabetes, hyperlipidemia, cardiovascular disease, alcohol intake, smoking, body mass index (BMI), percent body fat (%BF), and waist circumference (WC). Compared with the insufficient or deficient vitamin D group , the sufficient vitamin D group had significantly lower odds ratios for having depressive symptoms (men OR=0.121, women OR=0.114), even after adjustment for age, hypertension, diabetes, hyperlipidemia, cardiovascular disease, alcohol intake, smoking, BMI, %BF, and WC. Conclusion: Vitamin D supplementation and outdoor activities should be key components of a lifestyle intervention against office workers' depression.

• Nuclear Engineering and Technology
• /
• 제23권1호
• /
• pp.56-65
• /
• 1991

RELAP5/MOD2 Cycle 36.04코드를 이용하여 LOFT대형냉각재 상실사고 모사실험 L2-3를 계산함으로써 코드의 대형냉각재상실사고에 관련된 열수력현상 예측능력을 평가하였다. 기본계산에서 원자로 압력용기는 이중노심유로와 분리강수관 모델로 모사되었다. 기본계산의 결과 계통의 전반적인 수력학적 거동과 감압기간동안 노심 고출력 부위에서의 열적 거동은 비교적 타당하게 예측되었다. 한편 과냉각-이상유동의 천이 기간동안 임계유량모델, 고질량유속에서의 임계열유속 상관식, 감압기간중의 재접수(Blowdown Rewet)의 판정기준등 코드의 모델/상관식의 부분적 결함이 발견되었다. 이 결함들에 의해 냉각재 재고량이 과대 평가되어 재환수기간의 노심의 열적거동 예측의 정확도가 감소되었다. RELAP5/MOD2 Cycle 36.04로 부터 개선된 코드를 사용한 계산 결과 재접수 현상의 예측 정확도를 개선할 수 있었다.