Yongsoon Park

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It is important to improve the overall efficiency of a photovoltaic (PV) inverter when it is connected to the grid. Fundamentally, the conversion efficiency from dc to ac power of an inverter is important. However, in the presence of partial shading, maximum power point tracking (MPPT) on PV modules is more important than the conversion efficiency. In this(More)
N-3 polyunsaturated fatty acids (PUFA) have anti-inflammatory effects and may be useful for the treatment of inflammatory diseases such as rheumatoid arthritis (RA).We examined the efficacy of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) supplementation on RA on top of standard anti-inflammatory treatment. Patients with RA were randomized into(More)
STUDY OBJECTIVE Dietary patterns are important for the physical and psychological development of adolescent girls. The purpose of the present study was to evaluate the relationship between dietary patterns and depression in this population. DESIGN, SETTING, AND POPULATION We conducted a case-control study in a tertiary university hospital of 849 girls(More)
Salt sensitivity is a risk factor for cardiovascular morbidity and mortality. To date, only a few genetic variations have been identified as being associated with salt sensitivity. This study aimed to estimate the prevalence of salt sensitivity in the Korean population and to identify genetic variants affecting its development. A total of 101 Korean(More)
This study investigated the hypothesis that a sorghum extract exerts anti-diabetic effects through a mechanism that improves insulin sensitivity via peroxisome proliferator-activated receptor gamma (PPAR-γ) from adipose tissue. Seven C57BL/6 mice were fed an AIN-93M diet with fat consisting of 10% of total energy intake (LF) for 14 weeks, and 21 mice were(More)
This paper presents a new connection method of triple two-level PWM converters to provide multi-level output waveform to a motor/transformer which has triple independent sets of three-phase winding. By simply changing the connection between the PWM converters and the windings of the motor/transformer, the level of winding voltage can be increased without(More)
Anthocyanin-rich black soybeans have been used in traditional East Asian medicine to cure diseases related to oxidative stress and carcinogens, but not obesity. Our objective was to investigate the effects of anthocyanin-rich black soybean testa extracts (BBT), Glycine max (Chongja No. 3), on obesity. In total, 63 participants defined as overweight or obese(More)
OBJECTIVE Obesity-related metabolic diseases may influence prostatic hyperplasia. This study examined the impact of obesity on prostate volume in men without overt obesity-related metabolic diseases. RESEARCH METHODS AND PROCEDURES We recruited 146 men over the age of 40 years who did not have overt obesity-related diseases, such as diabetes, impaired(More)
The risk of CHD has been linked to n-3 and trans-fatty acids. The purpose of the present study was to evaluate the hypothesis that lower n-3 fatty acids and higher trans-fatty acids in erythrocytes are associated with an increased risk of acute non-fatal myocardial infarction (MI), and that fatty acid profiles can discriminate MI cases from controls. Fifty(More)
Osteoporosis, which has become a serious public health concern, is influenced by diet, especially calcium intake. Dairy products are a good source of calcium, but plant calcium may also be important in populations that do not consume a large amount of milk. The purpose of the present study was to examine the hypothesis that calcium from vegetable sources is(More)