• 반도체디스플레이기술학회지
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• 제20권2호
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• pp.56-60
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• 2021

Recently, technologies for internet of things have been rapidly advanced with development of network. Also interest in smart healthcare that informs about motion information of users has been growing. In this paper, a system that is monitoring the weight on both feet by using aduino and FSR(Force Sensitive Resistor) Sensor is implemented. A 4-channel sensor driver module was implemented to measure a more accurate weight value. It is monitoring the weight on both feet by the using an application for either your PC or mobile device. Mobile applications can contribute to reducing human damage by sending messages along with location in emergency situations, such as injuries caused by falls during outdoor activities.

• 농업과학연구
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• 제43권5호
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• pp.742-749
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• 2016

Boar taint, an unpleasant odor of pork, is associated with two substances including androstenone and skatole. Testosterone is a steroid hormone as well as a strong predictor for androstenone secretion. Isoflavones of soy origin play a role in modulating the metabolism of sex hormones. Although several methods responsible for reducing boar taint are under investigation, the precise mechanism by which isoflavones reduce testosterone has not yet been identified. The objective of the current study was to investigate the effects of isoflavones extracted from a soy by-product on the concentration of serum testosterone in mouse. A total of 24 mice were supplemented with basal diet (control), daidzin plus genistin mix (T1), or isoflavone extracts (T2). After 11 days of treatment, size and weight of testis, as well as the concentration of sex hormones, including testosterone and estrogen, were analyzed. There was no difference in size or weight of testis from mice among control, T1, and T2. Serum testosterone levels were significantly decreased (p < 0.05) both in T1 and T2 when compared with the control group. Furthermore, estrogen concentration in blood was increased (p < 0.05) in T2 (numerically increased in T1) compared with the control group. Taken together, the use of isoflavones extracted from soy by-products would be a plausible strategy for reducing testosterone level, ultimately reducing boar taint without castration of piglets.

• 대한한방내과학회지
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• 제25권2호
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• pp.277-287
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• 2004

Objective : Diabetes is a disease in which the body does not produce or properly use insulin. Etiological studies of diabetes and its complications showed that oxidative stress might playa major role. Therefore, many efforts have been made to regulate oxygen free radicals for treating diabetes and its complications. Because Jindangwon has been known to be effective in treatment of diabetes, the methanol extract of Jindangwon was tested for its effectiveness in reducing the oxidative stress induced by Streptozotocin. Methods : Jindangwon was washed, dried in the shade and crushed. The crushed Jindangwon was extracted 3 times, each time with 3 volumes of methyl alcohol at $60^{\circ}C$ for 24 hours. The extract was filtered and evaporated under reduced pressure using a rotary evaporator to yield 30.6 g. Jindangwon extract was oral-administered to the diabetic rats induced by streptozotocin 50 mg per 1 kg of body weight for 15 days. The efficacy of the Jindangwon extract was examined with regard to the enzymatic pathways involved in the oxygen free radical production and the glutathione balance. Results : he effects of the methanol extract of Jindangwon in streptozotocin-induced diabetics rats with regard to body weight, blood glucose level, hepatic lipid peroxide level, hepatic xanthine oxidase activity and type conversion rate, hepatic glutathione level, hepatic glutathione peroxidase activity, hepatic glutathione reductase activity, hepatic aldose reductase activity, and hepatic sorbitol dehydrogenase activity were favorable enough to suggest that it is a cure for diabetes and its complications. Conclusions :These results support Jindangwon as an effective reducing agent for oxidative stress in the tissues and organs by regulating the production of oxygen free radicals. Jindangwon, in particular, shows promising results for its use as a cure, or preventative medicine for diabetes and its complications by reducing oxidative stress in beta-cells of the pancreas.

• 생약학회지
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• 제29권2호
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• pp.93-103
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• 1998

In order to investigate the reducing effect of velvet antler water extract (VAWE) on the toxicity of anti-cancer drug, cis-platin (CDDP) and mitomycin C (MMC), we examined effects of co-administration with VAWE and anti-cancer drugs on their toxicities. We recognized that $LD_{50}$ of CDDP/MMC were increased by co-administration with VAWE and them in mice. It was found that co-administration of VAWE and MMC increased the survival rate in mice treated by lethal dose of MMC. Also, co-administration of VAWE and CDDP/MMC inhibited decrease of the body weight and organ weight in mice intoxificated by CDDP/MMC. The increase of serum blood urea and serum creatinine levels in rats intoxicated by CDDP were significantly inhibited by the co-administrationin with VAWE and CDDP. The decrease of RBC and WBC in rats intoxificated by MMC were significantly inhibited by the co-administration with VAWE and MMC. These results suggest that the combined usage of VAWE and CDDP/MMC drugs may be a new method for prevented or minimized the toxicity of them.

• Journal of Microbiology
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• 제34권2호
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• pp.131-136
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• 1996

In order to known the extend of contribution to the degradation of organic materials and nutrient recycling by sulfate-reducing bacteria (SRB) and methane-producing bacteria (MPB) in sediment, the distribution and activity of these two groups of microorganisms were studied montly in 1994 at two sites, one littoral (Sanggulri) and the other profunndal (DAM), in Lake Soyang. In the seasonal distribution of two microorganisms, SRB were 1.07 $\times$ 10$^{3}$-2.42 $\times$ 10$^{5}$ cells/g-dry weight at Sanggulri, 2.40 $\times$ 10$^{5}$ -1.29 $\times$ 10$^{6}$ at Dam and MPB were 0.52 $\times$ 10$^{3}$ cells/g-dry weight at Sangguri and 1.44 $\times$ 10$^{3}$-6.89 $\times$ 10$^{3}$ at Dam. In these results, the density of SRB in Lake Soyang is much higher than other lakes. These high values might be due to higher sulfate concentration, 0.69-4.05 mM, than normal freshwater, 0.01-1.2 mM. And a good correlation of SRB and chlorophyll a concentration implied that the important environmental factor on distribution of SRB might be the concentration of available organic matter. In a comparison of sulfate-reducing rate and methane producing rate in 1995, the activity of SRB for the degradation of organic matter was higher than MPB by factor of 359. Conclusively SRB superior to MPB in the distribution and activity are more important annearobic bacteria in Lake Soyang sediments.

• 반도체디스플레이기술학회지
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• 제23권2호
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• pp.114-122
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• 2024

NF₃, Chamber cleaning gas, has a high Global Warming Potential (GWP) of 17,000, causing significant greenhouse effects. Reducing gas usage during the cleaning process is crucial while increasing the cleaning Rate and reducing cleaning standard deviation (Stdev). In a previous study with a 6-inch PECVD chamber, a multiple linear regression analysis showed that Power and Pressure had no significant effect on the cleaning Rate because of their P-values of 0.42 and 0.68. The weight for Flow is 11.55, and the weights for Power and Pressure are 1.4 and 0.7. Due to the limitations of the research equipment, which differed from those used in actual industrial settings, it was challenging to assess the effects in actual industrial environment. Therefore, to show an actual industrial environment, we conducted the cleaning process on a 12-inch PECVD chamber, which is production-level equipment, and quantitatively analyzed the effects of each variable. Power, Pressure, and NF3 Flow all had P-values close to 0, indicating strong statistical significance. The weight for Flow is 15.68, and the weights for Power and Pressure are 4.45 and 5.24, respectively, showing effects 3 and 7 times greater than those with the 6-inch equipment on the cleaning rate. Additionally, we analyzed the cleaning Stdev and derived that there is a trade-off between increasing the cleaning Rate and reducing the cleaning Stdev.

• 동아시아식생활학회지
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• 제23권6호
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• pp.704-712
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• 2013

This study was designed to examine the effects of bitter melon (BM) on the plasma blood glucose and cholesterol levels in diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats through an injection of streptozotocin (STZ) dissolved in a citrate buffer into the tail vein at a dose of 45 mg/kg of body weight. Sprague-Dawley rats were then fed for four weeks, with the experimental groups receiving a modified diet containing 5% or 10% powder derived from BM. The experimental groups were divided into 4 groups, consisting of the normal control group, STZ-control group and diabetic fed with BM 5% & 10% treated groups. The rats' body weight, blood glucose and cholesterol values were measured along with the hematocrit (Hct) values and aminotransferase activities. Body weight losses were observed in the diabetic groups, whereas the control rats gained weight. There were significant differences in kidney weight between the control group and the diabetic groups. The Hct levels of the diabetic BM-treated group were significantly higher than the STZ-control group. Aspartate aminotransferase activity was lower in the non-diabetic group compared to the diabetic experimental groups. Further, the blood glucose was significantly decreased in the 5% & 10% BM of the diabetic group. There were no significant difference in cholesterol levels among the diabetic groups. These results indicate that the supplementation of bitter melon may have a favorable influence on reducing the blood glucose level in STZ-induced diabetic rats.

• 한국안전학회지
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• 제27권4호
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• pp.96-100
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• 2012

Low back pain (LBP) is a major issue in modern industrialized society which is mainly caused by manual material handling (MMH) tasks. The objective of this study was to provide scientific data for establishing work standard for Korean workers throughout the laboratory experiment including some specific lifting tasks. Thirty male college students were recruited as participants. The maximum voluntary contraction (MVC), recommended weight limit (RWL), and psychophysical safety weight using Borg's CR-10 scale were studied. Results showed that the RWL was 8.4% MVC higher than the proposed psychophysical safety weight. Based on this result, it is suggested that the NIOSH lifting equation (NLE) should not be directly applied to Korean without reasonable modifications. The ratio of psychophysical safety weight to MVC was ranged from 20.1 to 26.4%. It is expected that use of the methodology in this study may provide better expectation of the work ability of Korean for reducing lower back pains caused by MMH.

• 한국정밀공학회지
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• 제19권12호
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• pp.38-44
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• 2002

A walking training robot is proposed to provide stable and comfortable walking supports by reducing body weight load partially and a force control of an arm of walking training robot using sliding mode controller is also proposed. The current gait training apparatus in hospital are ineffective for the difficulty in keeping constant unloading level and for the constraint of patients' free walking. The proposed walking training robot effectively unloads body weight during walking. The walking training robot consists of an unloading manipulator and a mobile platform. The manipulator driven by an electro-mechanical linear mechanism unloads body weight in various levels. The mobile platform is wheel type, which allows patients to walt freely. The developed unloading system has advantages such as low noise level, lightweight, low manufacturing cost and low power consumption. A system model fur the manipulator is established using Lagrange's equation. To unload the weight of the patients, sliding mode control with p-control is adopted. Both control responses with a weight and human walking control responses are analyzed through experimental implementation to demonstrate performance characteristics of the proposed force controller.

• 한국지반환경공학회 논문집
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• 제7권5호
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• pp.21-29
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• 2006

경량성토공법은 성토체 자중을 감소시켜 지반의 침하를 감소시키는 공법으로 작업의 편리성 등의 이유로 적용사례가 증가하고 있다. 이와 관련하여 스티로폼은 연약지반상에 경량성토재로서 활용할 수 있는 것으로 알려져 있다. 경량성토재로서 스티로폼의 사용은 응력증가를 최소화 할 수 있으며, 안정재 사용을 통하여 지지력 증대와 침하감소효과를 얻을 수 있다. 이에 본 연구에서는 연약점성토층 상부에 경량성토재를 포설하고 모형 지지력 실험과 유한요소해석을 실시하였으며, 그 결과를 바탕으로 경량성토재로서의 지지력 특성을 평가하였다. 실험결과 일반적인 성토재 보다 폐스티로폼을 이용한 성토재가 더욱 우수한 특성을 발휘하는 것으로 나타났다.