• Journal of the East Asian Society of Dietary Life
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• v.7 no.2
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• pp.221-232
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• 1997

This study is investigate the eating behavior between the elderly living at home and the elderly at nursing home in Inchon City. This survey was carried out by questionaires. The result are summarized as the followings: 1. Both the elderly living at home and the elderly at nursing home are not smoking and drinking. They are in good health. 2. The elderly living at home and the elderly at nursing home have diseases like neuralgia, hypertension, diabetes etc. 3. Both the elderly living at home and the elderly at nursing home have methods of health care of a regular eating and a good sleeping. The elderly at nursing home have a regular medical examination but the elderly living at home do not. 4. Health giving drugs are depression of blood pressure, a medicine for the stomach and bowels, an anodyne. And health giving sports are walking and jogging. 5. The elderly living at home and the elderly at nursing home are significant relationship on knowledge of nutrition. 6. The elderly living at home and the elderly at nursing home prefer to taste sweet, boiling, korean foods. 7. elderly living at home have meats once a week and the elderly at nursing home have twice a week. Both the elderly living at home and the elderly at nursing home have fish, fruits, vegetables twice a week. The elderly at nursing home have milks twice a week. 8. The frequency of snack intake is higher the elderly at nursing home than the elderly living at home. 9. The elderly living at home and the elderly at nursing home are satisfied their dietary life.

• Journal of Korean Biological Nursing Science
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• v.10 no.1
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• pp.96-104
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• 2008

Purpose: We had executed the 3 3 5 5 walking club program for 12 weeks for one hour three times per week to evaluate the effect of the program on health of the elderly. Methods: A pre and post measurement tool of the program was applied to measure obesity, rate of body fat, blood pressure, vital capacity, standard vital capacity, intake capacity of maximum oxygen, grasping power, reaction of whole body, pulse, body mass index (BMI), total bodily score, age of bodily strength, age of health. Data collected from this tool was analyzed by SPSS in paired t-test. Results: The 3 3 5 5 walking club program has affected the weight control of the participants. The participants of 3 3 5 5 walking club program reduced their weight from 61.7 kg to 61.25 kg, rate of body fat from 21.89 kg to 21.22 kg, standard vital capacity from 2,393.56 ml to 2,380.44 ml, reaction of whole body from 475.38 msec to 439.33 msec, and increased grasping power from 22.06 to 23.16 ml (p<.05), total bodily score 68.91 points to 71.38 points significantly (p<.05). Conclusion: The result indicated that the 3.3.5.5 Walking club program has an positive effect on improving health care of the elderly without special exercise tools.

• Journal of the Korean Society of Propulsion Engineers
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• v.14 no.2
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• pp.10-18
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• 2010

Scramjet engine is one of the core parts of hypersonic vehicle of next generation and being investigated by many countries. Korea Aerospace Research Institute performed a ground test of the model scramjet engine S1 in 2007. And, S2 model which is improved from S1 model in engine startability and thrust was tested with HIEST (High Enthalpy Shock Tunnel) at Kakuda Space Center of JAXA. Design condition of S2 model was Mach 6.7, however, it was tested at Mach 7.7 as an off-design condition test. As a test result, flow separation was found at the inside of the intake, but the engine showed stable combustion pressure distribution. Furthermore, compared to other test models, S2 model showed a good performance value in thrust and specific impulse.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.4
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• pp.175-184
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• 2017

With the improvement of living standards, the ventilation for the mitigation of indoor or outdoor air-pollution problems has recently attracted a lot of attention. Consequently, the ventilation for the supply of outdoor fresh air into a room is treated as an important building-design factor. The ventilation is generally divided into the forced and natural types; here, the former can control the ventilation rate by using mechanical devices, but it has the disadvantages of the equipment costs, maintenance costs, and noise generation, while the latter is applied to most workshops due to the absence of noise and the low installation and maintenance costs. In this experimental study, the ventilation performance of a typical rotating-type natural ventilator, which is called a "wind turbine," was investigated with the outdoor-wind velocity and the indoor/outdoor-temperature difference. From the experiment results, it was confirmed that the temperature difference of $10^{\circ}C$ corresponds to the ventilation driving force with an outdoor-wind velocity of 1.0 m/s. Additionally, the intake-opening area of a building also exerts a great effect on the ventilation rates.

• Journal of Preventive Medicine and Public Health
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• v.49 no.3
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• pp.143-152
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• 2016

Objectives: Metabolic syndrome is a cluster of risk factors for type 2 diabetes mellitus and cardiovascular disease. Associations between metabolic syndrome and several types of cancer have recently been documented. Methods: We analyzed the sample cohort data from the Korean National Health Insurance Service from 2002, with a follow-up period extending to 2013. The cohort data included 99 565 individuals who participated in the health examination program and whose data were therefore present in the cohort database. The metabolic risk profile of each participant was assessed based on obesity, high serum glucose and total cholesterol levels, and high blood pressure. The occurrence of cancer was identified using Korean National Health Insurance claims data. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated using Cox proportional hazards models, adjusting for age group, smoking status, alcohol intake, and regular exercise. Results: A total of 5937 cases of cancer occurred during a mean follow-up period of 10.4 years. In men with a high-risk metabolic profile, the risk of colon cancer was elevated (HR, 1.40; 95% CI, 1.14 to 1.71). In women, a high-risk metabolic profile was associated with a significantly increased risk of gallbladder and biliary tract cancer (HR, 2.05; 95% CI, 1.24 to 3.42). Non-significantly increased risks were observed in men for pharynx, larynx, rectum, and kidney cancer, and in women for colon, liver, breast, and ovarian cancer. Conclusions: The findings of this study support the previously suggested association between metabolic syndrome and the risk of several cancers. A high-risk metabolic profile may be an important risk factor for colon cancer in Korean men and gallbladder and biliary tract cancer in Korean women.

• Korean Journal of Community Nutrition
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• v.19 no.2
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• pp.133-141
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• 2014

Objectives: The purpose of this study was to estimate the prevalence of metabolic syndrome (MS), metabolic abnormalities, and nutrient intakes in Korea children and adolescents using the Korea National Health and Nutrition Examination Survey from 2008. Methods: A sample of 838 children and adolescent males (n=442) and females (n=396) aged 10-18 was used from the 2008 Korea National Health and Nutrition Examination survey. The diagnosis of the metabolic syndrome subjects was adapted from modified National Cholesterol Education Program-Adult Treatment Panel III by Ford. To compare nutrient intakes, we used a judgment sampling. The first group was composed of all children and adolescents (n=46) with MS. The second one along with the first group had children and adolescents with the same age, sex, and body mass index (BMI) but without MS (n=46). The control group like the first two had children and adolescents with same sex and same age but with normal BMI and without MS (n=46). Results: In this randomized controlled controlled trial, the prevalence of the metabolic syndrome was 5.8%. The risk factors was associated with the MS were abdominal obesity 9.4%, hypertriglyceridemia 25.0%, low HDL-cholesterol 10.3%, hypertension 23.4%, and hyperglycemia 7.1%. Among metabolic abnormalities, blood pressure was significantly affected by sex, age and obesity. On the other hand, HDL-cholesterol, triglycerides, and waist circumference were directly linked to obesity. There were no significant differences in nutrient intakes among the three groups. Conclusions: The prevalence of MS was higher in children (10-11 years old) than in adolescents (12-18 years old). There was a difference in hypertension among risk factors by gender, and there were no significant differences in nutrient intakes.

• Transactions of the Korean Society of Automotive Engineers
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• v.14 no.5
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• pp.32-38
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• 2006

Currently, due to the serious world-wide air pollution by substances emitted from vehicles, emission control is enforced more firmly and it is expected that the regulation requirements for emission will become more severe. A new concept combustion technology that can reduce the NOx and PM in relation to combustion is urgently required. Due to such social requirement, technologically advanced countries are making efforts to develop an environment-friendly vehicle engine at the nation-wide level in order to respond to the reinforced emission control. As a core combustion technology among new combustion technologies for the next generation engine, the homogenous charge compression ignition(HCCI) is expanding its application range by adopting multiple combustion mode, catalyst, direct fuel injection and partially premixed combustion. This study used a 2-staged injection method in order to apply the HCCI combustion method without significantly altering engine specifications in the aspect of multiple combustion mode and practicality by referring to the results of studies on the HCCI engine. In addition, this study confirmed the possibility of securing optimum fuel economy emission reduction in the IMEP 8bar range(which could not be achieved with existing partially premixed combustion) through forced charging, exhaust gas recirculation(EGR), compression ratio change and application of DOC catalyst.

• Journal of Physiology & Pathology in Korean Medicine
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• v.19 no.2
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• pp.530-535
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• 2005

A Korean traditional herbal formular, Taeumbiman-tang(TBT), was based on Taeumjowi-tang, currently the most widely used herbal formula compound, and which is known to be safe and have a positive effect on adult obesity. TBT was given to obese children for thirty days, and was found to be clinically safe and effective. The subjects were children who had been admitted into the hospital to be treated for obesity, that had more than 20% relative body weight. Originally there were 19 subjects, but 5 dropped out of the experiment. There were 5 girls and 9 boys, whose average ages were $11.00\;{\pm}\;2.60$ years, average weight was $54.01\;{\pm}\;18.59\;kg$. As a pretest, all of the volunteers were examined for height, weight, blood pressure, pulse rate, EKG, and chest radiography. The subjects underwent interview, body measurement tests, blood tests, and safety tests under 8 hour fasting state. After 15 days of TBT intake, the safety tests and the interview were conducted. The interview, body measurement tests, blood tests, and safety tests were conducted again after the 30 day trial was completed. The short term effects of TBT on obese children is weight loss. It did not cause any significant changes in the subject's livers, hearts, and kidneys, and clinically dangerous side effects or withdrawal symptoms were not observed.

• Journal of Physiology & Pathology in Korean Medicine
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• v.21 no.3
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• pp.658-665
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• 2007

Phyllostachys pubescens (Maengiong-Juk), a kind of the bamboo, was reported to have many beneficial pharmacological actions. in this study, of using 70% ethanol extract of Phyllostachys pubescens we investigated its efficacy on angiotensin converting enzyme (ACE) and antioxidant enzyme activities. In addition, vasorelaxant effect was examined in rat aortic rings. The inhibitory effect of ACE activity by Phyllostachys pubescens extract (PPE) was dose-dependently increased by 61.42% at 10mg/ml. PPE relaxed the pre-contracted rat aortic rings with 10$^{-6}$M phenylephrine, showing about 88% at 4.0mg/ml. Sprague Dawley (SD) rats were given different concentrations of PPE mixed in the drinking water for 10 weeks. PPE did not show any difference with control group in blood pressure, body weight (BW) and food intake. However, it revealed the highest total antioxidative effect at dose of 1.0 g/100 g BW in plasma by TEAC assay. Thiobarbituric acid reactive substance (TBARS) and protein carbonyl levels which are markers of tissue peroxidation, were significantly lowed at the same dosage. Furthermore, hepatic antioxidant enzymes such as total superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), glutathione reductase (GR) and catalase activities were also significantly increased by PPE (1.0 g/100 g BW). In conclusion, we suggest that PPE might have antihypertensive effect through increasing antioxidant activities.

• Journal of the Korean Society of Industry Convergence
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• v.20 no.2
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• pp.105-113
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• 2017

Recently the direct injection diesel engine is the most efficient one available for road vehicles, so this fundamental advantage suggests the compression injection diesel engine are a wise choice for future development efforts. The compression ignition diesel engine, with its bigger compression ratios if compared to the SI engine, offers a higher thermodynamic efficiency, also additionally the diesel engine with its less pumping losses due to the throttled intake charge as in a SI engine has higher fuel economy. But the largest obstacle to the success of this engine is meeting emission standards for Nitric oxides and particulate matter while maintain fuel consumption advantage over currently available engines. Thus its use should be largely promoted, however, diesel engine emits more Nitric oxides and particulate matter than other competing one. There has been a trade-off between PM and NOx, so efforts to reduce NOx have increased PM and vice versa, but trap change this situation and better possibility emerge for treating NOx emission with engine related means, such as injection timing, equivalence ratio, charge composition, and engine speed. The common rail direct injection system is able to adjust the fuel injection timing in a compression ignition engine, so this electronically controlled injection system can reduce the formation of NOx gas without increase in soot. In this study it is designed and used the engine test bed which is installed with turbocharge and intercooler. In addition to equipped using CRDI by controlling injection timing with mapping modulator, it has been tested and analyzed the engine performance, combustion characteristics, and exhaust emission as operating parameters.