• 한국항행학회논문지
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• 제4권2호
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• pp.182-190
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• 2000

본 논문은 HAPS와 이동위성 시스템과의 간섭영향 분석으로서, HAPS 고도가 20km와 50km일 때의 C/I 값을 구해 간섭 보호비를 초과하는 시간율 및 초과지속시간에 대한 평가를 행하였다. 그 결과 HAPS가 Iridium 시스템에 미치는 간섭의 경우 최저 C/I 값은 HAPS 고도가 50km일 때 20.42dB, 20km일 때는 12.73dB로 낮아지고, 이와 반대인 Iridium 시스템이 HAPS에 미치는 간섭의 경우도 각각 13.94dB에서 10.42dB로 낮아짐을 알 수 있었다. HAPS 고도에 따른 간섭영향을 보면, 고도가 낮아질수록 강한 간섭을 주거나 받게 되며, C/I 최저값 또한 HAPS 고도에 따라 다른 시점에서 나타난다.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2000년도 종합학술발표회 논문집 Vol.10 No.1
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• pp.34-38
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• 2000

본 논문은 HAPS와 이동위성 시스템과의 간섭영향 분석을 HAPS 고도가 20Km와 50Km 일 때의 C/I 값을 구해 간섭 보호비를 초과하는 시간율 및 초과지속시간에 대한 평가에 대한 평가를 행하였다. 그 결과 HAPS가 Iridium 시스템에 미치는 간섭의 경우 최저 C/I 값은 HAPS 고도가 50Km일 때 20.42dB, 20Km일 때는 12.73dB로 낮아지고, 이와 반대로 Iridum 시스템이 HAPS에 미치는 간섭의 경우도 각각 13.94dB에서 10.42dB로 낮아짐을 알 수 있었다. HAPS 고도에 따른 간섭영향을 보면, 고도가 낮아질수록 강한 간섭을 주거나 받게 되며, C/I 최저값 또한 HAPS 고도에 따라 다른 시점에서 나타난다.

• 대한간호학회지
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• 제52권4호
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• pp.451-463
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• 2022

Purpose: This study examined the reciprocal relationships between depression and income, and gender differences in these relationships among older adults in South Korea. Methods: Using 2015 to 2019 of the Korea Welfare Panel Study (KoWePS), we studied 6,070 older adults (2,394 men and 3,676 women) aged 60 years over in 2015. The generalized estimating equation was employed to explore the effect of an individual income on depression and the reverse causal link-that of depression on income. Results: The study found the reciprocal relationships between income and depression. Income has a significant impact on depression. Higher-income was linked to decreased risks of the Center for Epidemiologic Studies Depression (CES-D) scores among older adults (B = - 0.121, p < 0.001). Estimates of the reverse causal link show that higher CES-D scores were also linked to income reduction among Korean older adults (B = - 0.007, p < 0.001). In addition, we also observed gender differences in the impact of income on depression but not in the reverse causal link. Income has more detrimental to psychological consequence for older men (B = - 0.108, p < 0.001) than older women (B = - 0.057, p < 0.001). Conclusion: The finding implies that both psychological and social protection policies for the elderly are needed in view of gender perspective.

• 한국통신학회논문지
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• 제29권10B호
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• pp.841-848
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• 2004

네트워크 상에 장애가 발생 시에는 서비스들의 Qos 요구사항을 만족시킬 수 있는 또 다른 백업 경로를 사용하여 서비스해야 한다. 따라서 본 논문에서는 IP 네트워크 상에 발생된 단일 회선 장애를 위해 simple PFC(5-PFC) 기법과 다중 회선 장애를 위한 iterative PFC(i-PFC) 그리고 라우터와 같은 노드 장애를 복구하기 위한 fault_node Avoidance PFC(a-PFC) 기법들을 제안하고 이를 기반으로 Direct_destination Rerouting(DR) 기법을 최소 재라우팅 비용 문제를 통해 성능 비교 분석하기로 한다.

• 한국통신학회논문지
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• 제29권9B호
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• pp.791-798
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• 2004

네트워크 상에 장애가 발생 시에는 서비스들의 QoS 요구사항을 만족시킬 수 있는 또 다론 백업 경로를 사용 하여 서비스해야 한다. 따라서 본 논문에서는 IP 네트워크 상에 발생된 단일 회선 장애를 위해 simple PFC(s-PFC) 기법과 다중 회선 장애를 위한 iterative PFC(i-PFC) 그리고 라우터와 같은 노드 장애를 복구하기 위한 fault_node Avoidance PFC(a-PFC) 기법들을 제안하고 이를 기반으로 Direct_destination Rerouting(DR) 기법 을 최소 재라우팅 비용 문제를 통해 성능 비교 분석하기로 한다.

• 한국한의학연구원논문집
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• 제8권2호통권9호
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• pp.47-65
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• 2002

This project is planned to grasp the present situation of traditional medicine part in our country and to study protection method about this by the intellectual property which is the international concerning point recently. Through this, we will be able to devise means to deal with protection method of traditional medicine being developed by WIPO now. Traditional medicine field In our country Is organized with specific condition separated into the part of institution and the part of non-institution. So, because of the closed peculiarity, we have experienced the difficulties to understand the real facts about traditional medicine. We cannot be indifferent to the matter anymore. Because the expectation of object people is high, we could expect the realization of research content. In 1 detail project, we investigated the situation of traditional medicine in our country through various collecting methods for excavation of oriental treatment technique and herb medicine which is worth protecting. With it, we sorted again into 56 kinds of 11 parts through analysis of validity in the way of oriental medicine. And we tried to link this up 2 detail project which is about legal and institutional guarantee concerning protection. furthermore, we tried to find approach ways for security of objectivity into 4 steps with the example of model disease. we could complete practical classification of traditional medicine in our country. In 2 detail project, we studied the protection method by the intellectual property through research result in 1 detail project. For this, we observed an outline of the intellectual property including a patent application analysis in folk traditional medicine part, and problems of traditional medicine protection and world trend by traditional knowledge protection tendency and the patent law In domestic traditional medicines, the aspects unprotectable with the patent law now were remained. So, we suggested supplementary plan. And we also suggested the freedom of utilization between traditional medicine possession countries (in-situ utilization) and the demand compensation payment for a third country (ex-situ utilization) in connection with international movement.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 하계종합학술대회 논문집(1)
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• pp.11-14
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• 2004

Digital Video Broadcasting - Satellite (DVB-S) [1] (EN 300 421(bibliography)) was introduced as a standard in 1994. However, by combing with higher order modulation, promise more powerful alternatives to the DVB-S / DVB-DSNG coding and modulation schemes. Variable rate coding and modulation (VCM) may employed to provide different levels of error protection to different service components. Adaptive coding and modulation (ACM) provides more exact channel protection and dynamic link adaptation to propagation conditions, targeting each individual receiving terminal. By these reasons, DVB-S2 introduced. This paper derives exact symbol error rate(SER) of 16-Amplitude Phase Shift Keying(APSK) modulation by using Craig's formula. 16-APSK modulation is used in DVB-S2. The difference between Union Bound and Craig's formula is 1.26dB in low SNR and 0.1dB in high SNR.

• Journal of Radiation Protection and Research
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• 제13권2호
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• pp.88-94
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• 1988

조사된 경수로 핵연료의 도로 수송시, 방사선 영향을 INTERTRAN 코드로 평가하였다. 계산된 결과는 인구밀도로 구분한 각 지역의 소집단과 작업자에 따라 집단 선량당량으로 구하였다. 정상 수송과 수송 사고에 대한 평가 결과, 각 집단의 선량은 매우 낮은 수준을 나타내었다. 계산 프로그램은 다양한 입력 자료에 의하여 정량화 되므로 앞으로 입력 자료의 확보를 위한 연구가 필요하다.

• Natural Product Sciences
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• 제12권3호
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• pp.150-152
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• 2006

The ethanol extract of Sida acuta Burm. (ALSA) whole plant was studied for its anti-ulcer activity against aspirin plus pylorous ligation induced gastric ulcer, HCl-ethanol induced ulcer, and water immersion stress induced ulcer (WISIU) in rats. We found that ALSA at a dose of 300 mg/kg, (orally) markedly decrease the incidence of ulcers in the first two models. ALSA showed reduction in gastric volume, free acidity, and ulcer index (53.69%). It has not reduced the total acidity significantly and no significant change in pH. It also showed 55.14% gastro protective activity, wheres standard drug sucralfate showed 94.85%. WISIU showed protection index 24.4%, whereas standard drug omeprazole (OMEZ) showed protection index 100%.

• 산업기술연구
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• 제15권
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• pp.113-122
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• 1995

By integrating WDM to OPS unit which plays an important role for the reliability of CPN, we made it possible to provide CATV, VOD, and high-speed data services simultaneously and to meet the requirements for new services in the future. For the design of optimal system, the link analysis of power budget has been performed. Also, the prototyped system has been tested with STM-1 level signals to confirm functions such as transmission, distribution, and protection. The results proved that when occurred out-of-order or recovery of ONU, the system did the pertinent switching with minimum loss for high-speed data services. Also for video distribution services, the system has distributed STM-1 level signals successfully.