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MF-TDMA 광대역 위성시스템을 위한 QoS 기반 최적 타임슬롯 할당 체계
장근녕,이기동,박유진 한국경영과학회 2004 韓國經營科學會誌 Vol.29 No.4
In this paper, we consider broadband satellite systems using MF-TDMA(Multi-Frequency Time Division Multiple Access) scheme. First, we analyze return link, superframe structure, and QoS(Quality of Service) parameters in broadband satellite systems, and mathematically formulate the QoS-based optimal timeslot allocation problem as a nonlinear integer programming problem for broadband satellite systems with clear-sky and rain-fade satellite terminals, and multiple data classes. Next, we modify the proposed problem to solve it within in a fast time, and suggest the QoS-based optimal timeslot allocation scheme. Extensive simulation results show that the proposed scheme finds an optimal solution or a near optimal solution within 5ms at Pentium IV PC.
서울 일부지역의 실내의 Radon 오염도 조사연구(Ⅲ)
김창균,김유현 高麗大學校 倂設 保健大學 保健科學硏究所 2003 保健科學論集 Vol.29 No.1
This study was conducted to find out the indoor radon concentration in 2nd and 4th floor room of the same building located in Seoul from January to December in 2002 and the following results were achieved; 1. The indoor radon concentration of 2nd floor room was higher than that of 4th floor room from 2.3 times to 2.6 times in average. 2. The indoor radon concentration at 9:00 A.M. was higher than that at 5:00 P.M. from 1.16 times to 1.31 times in average. 3. The change of indoor air was the useful factor to reduce the indoor radon concentration. 4. The fundamental device to shield the route of an inflow of radon was demanded to reduce the indoor radon concentration.
횡 요천골부 후피부판 (Transverse Lumbosacral Back Flap)을 이용한 천골부 욕창 치험례
전건수,김유승,하재성,박준용,서정오 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.3
Pressure sore is an area of ischemic tissue loss resulting from prolonged or often repeated pressure, usually over a bony prominence of body. Recently, the prevalence of pressure sore is major clinical problem, due to the increased number of patients with spinal cord injuries or longterm comatous patient after traffic, industrial accidents. The surgical principles in the treatment of pressure sores are total excision of the ulcer, scartissue, bursae, complete removal of all infected bone with recontouring of bony prominences to alleviate discrete pressure points and resurfacing and padding of the defects with healthy and well vascularized tissues. The sacral sore is the most common site for the development of pressure sore in Korea. We had experienced 14 cases who had received surgical treatments for sacral sores with transverse lumbosacral back flap. We obtained the following conclusions. Advantages 1)It is quick and easy procedure 2)The flap elevation itself is relatively bloodless 3)The donor defect is in a non-weight-bearing area 4)Muscle is not sacrified(possibly of importance in the ambulatory patient) 5)Surgical options are preserved in cases of recurrence(the flap itself may be reelevated and inset in some cases of recurrence) Disadvantages 1)It is lacking the bulky padding afforded by alternative musculocutaneous flaps 2)The vascularity of the flap tip is empirically less dependable than that of a musculocutaneous flap 3)The donor defect is large, cannot usually be closed primarily, and may prove of cosmetic concern
야생너구리(Nyctereutes procyonoides)의 혈액 및 혈액화학치
송근호,유명조,김덕환 충남대학교 수의과대학 동물의과학연구소 2002 動物醫科學硏究誌 Vol.10 No.-
This study was performed to determine the blood and blood chemical values on captured 16 raccoon dogs (Nyctereutes procyonoides). Hematological examination revealed that RBC, Hb, PCV, MCV, MCH and MCHC values were 7.9±0.8x10^(6)/㎕, 14.0±2 g/dl, 44.1±5.5 %, 56.9±3.8 fl, 18.0±1.4 pg and 31.9±2.9 g/dl. respectively, and also revealed that WBC, neutrophil, lymphocyte. eosinophil and monocyte values were 13.6±2.4x10^(3)/㎕, 8.9±2.1x10^(3)/㎕, 2.7±0.8x10^(3)/㎕, 1.1±0.5x10^(3)/㎕ and 1.0±0.4x10^(3)/㎕, respectively. Blood chemical examination showed that total protein, albumin, globulin and A/G ratio values were 7.9±0.9 g/dl, 3.0±0.3 g/dl, 4.8±0.7 g/dl and 0.6±0.1, respectively, and also showed that ALT, AST, BUN. Creatinine and glucose values were 95.8±57.8 1U/ℓ, 64.4±30.1 1U/ℓ, 20.8±5.4 ㎎/dl, 0.7±0.1 ㎎/dl and 58.5±19.1 ㎎/dl, respectively.
송유진,김정원,이종근 國立昌原大學校 基礎科學硏究所 1994 基礎科學硏究所論文集 Vol.6 No.-
In this paper, we proposed 'the composition of Petri Nets(PN) using relational function' in the previous paper. In other words, by the composition, two joinable transitions are merged to a new transition after eliminating common places. In addition we propose a extended composition of place using relational function, such that two joinable places are merged to a new place after eliminating common transitions.
마라톤 웹사이트의 서비스품질이 고객만족 및 구매후 행동에 미치는 영향
고성온,유근직 江原大學校附設體育科學硏究所 2004 江原大學校附設體育科學硏究所論文集 Vol.- No.27
The purpose of this study was to examing the influence of service quality in marathon web site on customer satisfaction and post-purchase behavior. The subjects of this study were 331 people who had visited a marathon web site. The web site's service quality is consisted of four dimensions as follows; Information, Convenience, flow experience, Communication factors. To analyze the collected data for this study, SPSS 10.0 program and AMOS 4.0 were used for descriptive statistics, factor analysis and structural equation modeling(SEM). The results of this study were as follows. The first, three factors n service quality(Information, Convenience, flow experience) affected the customer satisfaction with statistic significance. Especially, level of providing Information affected customer satisfaction directly. The second, customer satisfaction affected word of mouth(WOM) and reentering in web site related to marathjon with statistic significance. In conclusion, web site for marathon in future needs to improve the information service, helpful and interesting contents, and convenient procedures for facilitating people's interest in marathjon.
인권 보장의 현황과 과제 : 노동인권의 보장을 중심으로
오문완,김유미,도회근 울산대학교 사회과학연구소 2000 사회과학논집 Vol.10 No.1
우리나라에서 인권 보장의 현실을 생각할 때 우리는 앞으로도 많은 과제를 해결해야 한다. 특허 노동인권의 보장 문제가 되면 더욱 그러하다 그리고 문제를 해결하는 데는 기본적인 시각의 정립이 필요한데, 우선 노동인권의 성격에 대해 제대로 이해하고 있어야 한다. 또한 사회적 기본권의 구체적 권리성을 인정하는 견해에 주목할 필요가 있다. 아울러 노동인권의 보장에 관한 국제적인 움직임을 주시해야 한다. 노동시장의 변화하는 모습 역시 놓쳐서는 안된다. To consider the reality of guaranteeing human rights in Korea, there are many problems to be resolved, especially in the field of labor. Most of all we should settle our position about labor rights and the character of those. And it may be helpful to examine the opinion approving the concrete aspects of the social rights. We should not neglect to pursue the international movement of guaranteeing labor rights and the change of labor market.
Bi₂Sr₂Ca₁Cu₂O8+δ단결정의 전기저항과 전송메카니즘에 대한 연구
설정식,손인호,채건식,주유환 慶南大學校 附設 基礎科學硏究所 1998 硏究論文集 Vol.12 No.-
In this work, we have used Aslamasov-Larkin(AL) theory for analyzing the resistive and electrical mechanism of as-grown and 8 hour O₂annealed Bi₂Sr₂Ca₁Cu₂O8+δ samples. Tc is 89K for as-grown sample and 83K for annealed sample. By fluctuation conductivity using AL theory. we have examined that as-grown sample had 3D transition in the wide critical region than for the annealed sample.