• The Bulletin of The Korean Astronomical Society
• /
• v.37 no.2
• /
• pp.180.2-180.2
• /
• 2012

저궤도 인공위성에서 배터리는 태양전지 배열기에서 생성된 전력을 저장하여 탑재체 구동과 식구간 위성의 동작 유지를 위하여 사용된다. 최근 상용 배터리 시장에서도 리튬이온 배터리의 보급이 많이 이루진거와 마찬가지로 인공위성에서도 리튬이온 배터리의 사용이 보편화 되는 추세이다. 리튬이온 배터리가 기존에 인공위성에서 사용되던 니켈카드늄이나 니켈수소 배터리에 비하여 자연 방전량이 적다고는 하지만 이 또한 존재하며, 초기 위성 발사시 태양전지 배열기의 전개를 통한 전력 생산이 이루어질 때까지 위성의 동작을 보장하고 임수종료까지 에너지를 충방전 할 수 있는 상태를 유지하여야 하므로 위성 발사 전까지 배터리의 상태를 최적으로 유지해야 함은 필수적이다. 본 연구에서는 저궤도 인공위성의 발사 전까지 배터리의 상태를 최적화 하기위한 배터리 운용에 관하여 기술하며, 배터리 상태에 대한 실측 데이터를 제시하여 배터리의 정상상태를 검증하였다.

• Korean Journal of Food Science and Technology
• /
• v.38 no.3
• /
• pp.432-437
• /
• 2006

This study was carried out to investigate the effects of mulberry-leaf powder Tofu (MPT) on serum lipids profiles, Ca levels, Ca/P ratio and Pb levels in 30 middle aged obese women living in the Choongnam area. 100 g/day MPT was consumed for 4 weeks. The nutrient contents per 100 g MPT were 86.71 kcal (energy), 8.98 g protein, 0.53 mg fiber, 211.33 mg Ca and 1.59 g fat. Anthropometric measurements, 24 h recall dietary intakes, serum levels of protein, albumin, glucose, Ca and Pb, lipid profiles (cholesterol, triglyceride, HDL-cholesterol, LDL-cholesterol), and the Ca/P ratio were analyzed before and after consumption of MPT. After consumption of MPT, there were no significant differences in anthropometric measurements, the levels of serum protein, albumin, glucose, total cholesterol, HDL-cholesterol, lipase activity, HTR (HDL-cholesterol/total cholesterol), CRF (cardiac risk factor), Ca, Ca/P ratio and Pb. There were decreases in the levels of serum triglyceride, LDL-cholesterol, AI (atherogenic index) and LHR (LDL-cholesterol/HDL-cholesterol). Significantly increased dietary intakes of plant protein, total Ca, and plant Ca were observed.

• Journal of Acupuncture Research
• /
• v.22 no.3
• /
• pp.145-153
• /
• 2005

Objective : This study was designed to investigate the effects and adverse effects of Choweseuncheng-tang on obesity patients Methods : Choweseuncheng-tang was given to 20 obesity patients who have no abnormality of GOT, GPT and past medical history. Additionally, electroacupuncture was performed on Fuchao(腑巢) with 60Hz. We compared body weight, body fat and laboratoy test(GOT, GPT, BUN, Creatinine) between before and after treatment. Blood pressure, heart rate and clinical symptoms were checked to investigate the side effects. Decrease of body weight was checked in accordance with Sasang constitutional type, appetite type, and BMI. Results : 6 patients(BMI 23-24.9), 10 patiets(BMI 25-29.9), and 4 patients(BMI over 30) were showed decrease of body weight. We found body fat was decerased $3.16{\pm}1.25%$. BUN, Creatinine, GOT and GPT were increased within normal range. There were adverse event of autonomic hyperactivity(11 patients), gastrointestinal symptoms(7 patients) and others(3 patients). Conclusions : According to above results, Choweseuncheng-tang could be used effectively, but should be taken cautiously on obese patients.

• Korean Journal of Veterinary Research
• /
• v.41 no.3
• /
• pp.413-419
• /
• 2001

This study was performed to evaluate the renal hemodynamics using color Doppler ultrasonography in dogs with unilateral experimental hydronephrosis treated with transarterial embolization of the renal artery (TAE-RA). Experimental hydronephrosis was induced by ligation of unilateral ureter in 12 dogs. The mean resistive index (RI) value of kidney was significantly increased at 4, 9, 17 days after ligation of ureter. Unilateral hydronephrosis was established in 12 dogs at 17 days after ligation of ureter. Renal artery embolization was performed using selective catheterization in the hydronephrotic kidney of seven dogs and EKG, $SpO_2$body temperature, pulse, and respiratory rate were within normal ranges during procedures. There were no dogs expired after TAE-RA and no side effects associated with regurgitation of iohexol-ethanol solution. In color Doppler ultrasonographic findings, there was no blood flow into the embolized kidneys treated by TAE-RA, however, blood flow signal was found in contralateral normal kidney of dogs treated with TAE-RA compared to that of normal kidney in normal control group. It is concluded that TAE-RA does not affect the hemodynamics of contralateral normal kidney in dogs with experimental hydronephrosis and color Doppler ultrasonography is simple and non-invasive modality for the monitoring of the revascularization of the renal artery after TAE-RA.

• Journal of the Korean Magnetics Society
• /
• v.9 no.1
• /
• pp.55-63
• /
• 1999

It is necessary to eliminate the broad band noise whose frequency is in the range of several kHz to tens MHz generated from the AC power line to supply the power to electrical and electronic equipments. Because this kind of noise could damage or malfunction such equipments. To suppress those noises, some conventional devices such as a filter or surge suppressor have been used. However, they can not be isolated from the common-mode noise widely spreaded in all power line, which results in poor common-mode rejection performance. In this paper, we proposed a design method of shielded isolation transformer and a jumped circuit analysis model for shielded isolation transformer applicable to filtering common-mode noise as well as normal-mode noise. The analysis model has been verified as a suitable one for shielded isolation transformer through comparison of the simulation with experiment. In addition, it has been shown that the reduction performance for conducted noise of prototype 3 kVA shielded isolation transformer is superior to a unshielded isolation transformer.

• Tuberculosis and Respiratory Diseases
• /
• v.43 no.4
• /
• pp.527-535
• /
• 1996

Background : Cell adhesion molecules knave been Implicated In the various stages of tumor progression and metastasis. ICAM-1 plays a important roles in cell-cell interactions in inflammatory and immune response of several diseases. Recently, elevated levels of sICAM-1 in circulation was reported as association with liver metastasis in gastric, Colonic, gall bladder and pancreatic cancer, with reduced survival in malignant melanoma. This study was performed to measure the sICAM-1 in patients with lung cancer and to evaluate the relations between staging of lung cancer and level of sICAM-1. Methods : Serum sICAM-1 was measured in 36 patients with lung cancer according to the pathologic types and clinical staging before therapy and in 8 controls with ICAM-1 ELISA kit. Results : Serum sICAM-1 levels were elevated in patients with lung cancer except small cell type. Also progression and metastasis of lung cancer associated with elevation of sICAM-1 levels. Conclusion : These results suggest that higher levels of serum ICAM-1 reflect the progression and metastasis of lung cancer and it may be used as a marker with diagnostic and prognostic significance.

• Journal of agricultural medicine and community health
• /
• v.35 no.1
• /
• pp.36-45
• /
• 2010

Objectives: This study was performed to examine the healthy lifestyle influenced on the metabolic syndrome among the elderly in the rural area. We examined the changes of risk factors of metabolic syndrome after two years. Method: Out of 134 who did health screening at the J county health center from July 1 to August 31, 2006, 65 aged people confirmed to metabolism syndrome were selected as subjects. For the final analysis, 62 aged people who revisited after two years were selected our subjects. The data were analyzed using SPSS PC+ 12.0 program for descriptive, Chi-square test, t-test and ANOVA analysis. Result: The result of this study indicated that 62 metabolic syndrome patients in 2006 decreased into 53, and women were higher than men. The difference in the metabolic syndrome came from level of education, smoking, health practices, and past illness history. Conclusion: Therefore, the change of lifestyle needs to be induced by the level of education, and for the group of smoking, non-exercise, and past illness history not only regular checkups to prevent metabolic syndrome but also education to have interest on themselves may need intensively.

• Journal of Life Science
• /
• v.19 no.11
• /
• pp.1514-1521
• /
• 2009

To evaluate the feasibility of cathepsin-B levels in preoperatively screening patients with thyroid cancer, we assigned these patients to either the thyroid cancer group (n=32) or the nodular hyperplasia group (n=7). Five healthy volunteers served as controls (n=5). We quantified cathepsin-B expressions in cancerous lesions with follicular carcinoma and hyperplastic lesions with nodular hyperplasia, and compared the degrees to those of normal thyroid tissue, which was obtained from matched contralateral lobe. The activity of serum cathepsin B was significantly higher in patients with thyroid carcinoma ($284.87{\pm}79.32$, ${\times}10^{-2}\;mU$) and those with nodular hyperplasia ($255.45{\pm}95.68$, ${\times}10^{-2}\;mU$) than compared to normal control ($168.94{\pm}15.10$, ${\times}10^{-2}\;mU$) (p<0.05). Based on the results of immunoassay, the concentrations of cathepsin B in the thyroid cancer group ($15.50{\pm}7.86\;ng/ml$) and the nodular hyperplasia group ($17.64{\pm}7.49\;ng/ml$) were higher than those of the control group ($4.85{\pm}0.61\;ng/ml$). The degree of cathepsin-B mRNA expression was significantly higher in cancerous or hyperplastic lesions than normal thyroid tissues from matched contralateral lobe with follicular carcinoma or non-neoplastic thyroid disease. Our results indicate that the activity of serum cathepsin B is a useful indicator in screening patients with nodular hyperplasia or neoplastic thyroid disease and it may be involved in the abnormal proliferation of cells.

• Korean Journal of Cognitive Science
• /
• v.9 no.1
• /
• pp.41-46
• /
• 1998

The argument-structure distributions of predicates in the speech of two roca-type aphasic patients and one Conduction-type patient are compared with both matched controls and each other on the basis of narrative production data. Whereas English-speaking agrammatics have been reported to have difficulties producing noncopular unaccusative predicates (Kegl 1995) Korean-speaking agrammatics are found not to have particular difficulties with unaccusative predicates. On the assumption that agrammatics lack specific syntactic knowledge for the processing of displaced arguments from their lexically specified positions. it is proposed that unaccusatives in Korean do not involve the displacement of arguments for Case-theoretic reasons or involve a vacuous movement. if any.

• Food Industry And Nutrition
• /
• v.7 no.3
• /
• pp.44-49
• /
• 2002

본 연구는 retinyl acetate와 $\beta$-carotene보충식이가 에탄올에 의한 산화적 손상에 미치는 영향을 조사하고자 흰쥐에게 비타민 A와 $\beta$-carotene을 보충한 식이를 5주간 급여한 후 에탄올을 급성으로 투여하여 혈청과 간 조직에서 생성되는 지질과 지질과산화물 함량 그리고 glucose-6-phosphatase 활성도를 측정하였다. 본 실험에서 얻은 결과를 요약하면 체중 증가량은 전 실험군에서 유의적인 차이없이 실험 기간 동안 증가되었으며 사료섭취량과 식이효율을 그리고 간 중량 역시 각 군 모두 유의적인 차이를 나타내지 않았다. 혈청 중성지질 함량은 대조군과 retinyl acetate 보충군에서 높은 함량을 보였으나 통계적인 유의성은 없었다. 총 콜레스테를 함량은 대조군과 $\beta$-carotene 보충군은 비슷한 수준을 나타낸 반면 retinyl acetate 보충군에서는 유의적으로 감소되었다. HDL-콜레스테롤 함량은 대조군에서 가장 높았으며 LDL-콜레스테롤 함량은 유의적이지는 않았으나 retinyl acetate 보충군에서 가장 낮은 함량을 보였다. 동맥경화지수는 전 실험군에서 유의적인 차이는 없었으나 retinyl acetate 보충군에서 가장 낮았다. 간 마이크로솜 내에서 지질과산화물 함량은 재도군에 비하여 $\beta$-carotene 보충군에서 유의적으로 감소되었다. Retinyl acetate와 $\beta$-carotene 보충군 사이에서는 유의적인 차이가 없었으나 급성적인 에탄올 투여시에 $\beta$-carotene의 보충 급여가 지질과산화반응에 방어효과가 있는 것으로 나타났다. 간 조직중의 glucose-6-phosphatase 활성도는 비타민을 정상적으로 공급시킨 대조군이 retinyl acetate나 B-carotene 보충군에 비하여 유의적으로 높았으며 retinyl acetat와 B-carotene 보충군 사이에는 유의적인 차이가 없었다.