광 버스트 교환 망의 성능향상을 위한 버스트 전송률 제어 방식

이수경,김래영,Lee Su kyoung,Kim Lae young 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.3a

광 버스트 교환 망에서 contention으로 인한 버스트의 손실은 망 성능에 중요한 영향을 끼친다. 많은 contention resolution 방식들이 제안되었지만 이들 중의 대부분은 contention을 방지하기 보다는 주로 수동적인 형태로 contention을 해결하는데 주력하고 있다. 본 논문에서는 망 내 트래픽 부하와 버스트 손실에 따라 버스트의 전송률을 제어하는 능동적인 contention avoidance 방식을 제안한다. 제안한 방식이, 기존의 광 버스트 전송률 제어 방식 및 버스트 전송률 제어를 제공하지 않는 일반적인 광 버스트 교환 모델과 비교하여 버스트 손실률이 향상됨과 동시에 처리율(throughput)도 보장함을, 시뮬레이션을 통해 입증한다. In Optical Burst Switching(OBS) networks, burst loss due to contention significantly affects the performance of networks. Even if many contention resolution schemes have been proposed, most of them have focused mainly on passively resolving contentions instead of avoiding them. In this paper, we propose an active contention avoidance scheme which controls a burst sending rate according to traffic load and burst loss in a network. Simulation results show that the proposed scheme can more effectively reduce the burst loss rate compared to existing OBS model with and without burst sending rate control, and at the same time guarantees throughput.

동심축류가 유도되는 미세유체 소자 기반 Collagen Type I 미세섬유의 제작

이수경,이광호,Lee, Su Kyoung,Lee, Kwang-Ho 대한의용생체공학회 2016 의공학회지 Vol.37 No.5

In this study, a co-axial flow induced microfluidic chip to fabricate pure collagen type I microfiber via the control of collagen type I and Na-alginate gelation process. The pure collagen type I microfiber was generated by selective degradation of Ca-alginate from 'Core-Shell' structured hydrogel microfiber. To make 'Core-Shell' structure, collagen type I solution was introduced into core channel and 1.5% Na-alginate solution was injected into side channel in microfluidic chip. To evaluatethe 'Core-Shell' structure, the red and green fluorescence substances were mixed into collagen type I and Na-alginate solution, respectively. The fluorescence substances were uniformly loaded into each fiber, and the different fluorescence images were dependent on their location. By immoblizing EpH4-Ras and C6 cells within collagen type I and Na-alginate solution, we sucessfully demonstrated the co-culture of EpH4-Ras and C6 cells with 'Core-Shell' like hydrogel microfiber for 5 days. Only to produce pure collagen type I hydrogel fiber, tri-sodium citrate solution was used to dissolve the shell-like Ca-alginate hydrogel fiber from 'Core-Shell' structured hydrogel microfiber, which is an excellent advantage when the fiber is employed in three-dimensional scaffold. This novel method could apply various application in tissue engineering and biomedical engineering.

발목에 적용한 무게 부하가 뇌졸중 환자의 보행요소에 미치는 영향

이수경,Lee, Su-Kyoung 대한고유수용성신경근촉진법학회 2018 PNF and Movement Vol.16 No.2

Purpose: This study aimed to analyze the visual and spatial elements of the gait of a stroke patient who had diverse ankle weight loads applied, according to weight changes. Methods: The subject was a 57-year-old stroke patient diagnosed and hospitalized with a left intracerebral hemorrhage. A weight equivalent to 0%, 1%, and 2% of his body weight was applied to the area 5cm upward from the ankle using a Velcro strap. He was then trained on a treadmill, receiving a six-minute walk test to evaluate his gait ability. A gait analyzer was used to collect visual and spatial elements, such as gait distance, gait velocity, cadence, step length, stride length, and swing phase, according to a weight load equivalent to 0%, 1%, and 2% of his body weight. Results: According to the results of applying 0%, 1%, and 2% of his body weight on the ankle, except for gait velocity, his gait distance, cadence, step length, stride length, and swing phase were higher when 1% of his body weight was applied compared to 0% or 2% of his body weight. Conclusion: Applying a weight equivalent to 1% of the body weight to the ankle positively affected the visual and spatial element of the gait and heightened the efficiency of exercise during treadmill training, a gait-training tool generally used for stroke patients. However, the result is difficult to generalize because the number of subjects was small with only one subject.

중년 직장여성의 일-가정 갈등이 삶의 의미에 미치는 영향: 사회적지지와 자기효능감의 매개효과를 중심으로

강명수(Kang, Myung­-Su),류은진(Ryoo, Eun-Jin),이수경(Lee, Soo-Kyoung) 한국가족학회 2019 가족과 문화 Vol.31 No.3

본 연구는 다중역할을 수행하고 있는 중년 직장여성을 대상으로 일-가정 갈등, 사회적지지, 자기효능감, 삶의 의미 간의 관계를 파악하고자 하였다. 구체적으로 연구 대상자는 40세에서 60세 미만의 자녀가 있는 맞벌이 중년 직장여성들로서 총 202명의 자료가 최종 분석에 사용 되었다. 구조방정식 모형을 통해 자료를 분석하였는데, 분석결과 첫째, 중년 직장여성의 일-가정 갈등은 사회적지지, 자기효능감과 유의미한 관계를 맺고 있었으나, 삶의 의미와는 직접적인 유의미한 관계를 갖고 있지 않았다. 둘째, 사회적지지와 자기효능감은 일-가정 갈등과 삶의 의미 간의 관계에서 유의미한 완전매개효과를 보이는 것으로 나타났다. 따라서 중년 직장여성이 다중역할 수행에서 삶의 의미를 찾도록 도와주기 위해서는 사회적지지와 자기효능감을 높여줄 필요가 있다. 연구결과를 토대로 교육과 상담에의 논의점 및 제안점을 제시하였다. The purpose of our study was to identify a structural relationship between the work-family conflict, social support, self-effectiveness and the meaning of life among married female workers who are performing multiple roles. The subjects were middle-aged married working mothers aged 40 to 60, they taked care of at least one child and worked more 10 hours in a week. The 202 data were analyzed using a structural equation model. The analysis results showed in the lives of middle-aged married female workers as follows. First, the work-family conflict had direct effects on social support and self-effectiveness significantly. And the work-family conflict had no significant direct effect but significant indirect effect on the meaning of life. Second, social support and self-effectiveness had complete mediation effects in relation between the work-family conflict and the meaning of life. Therefore, to find the meaning of life for middle-aged married female workers, it is necessary to enhance their social support and self-effectiveness. Based on the results of the study, we suggested the discussion for education and counseling.

만성 자발성 두드러기 환자에서 자가혈청 피부반응검사에 따른 검사실 소견과 증상 조절을 위한 약제의 비교

이수경 ( Su Kyoung Lee ),조민호 ( Min Ho Cho ),김병연 ( Byeong Yeon Kim ),강윤성 ( Yun Sung Kang ),최승헌 ( Seung Heon Choi ),손성욱 ( Seong Wook Sohn ) 대한천식알레르기학회 2012 천식 및 알레르기 Vol.32 No.4

Background: The autologous serum skin test is reported to be positive in up to 60% of patients with chronic spontaneous urticaria. However, the clinical role of autologous serum skin test is still poorly understood. Methods: We reviewed the medical records of 166 chronic spontaneous urticaria patients whose symptoms lasted for more than 6 weeks and compared their laboratory findings and medication levels according to autologous serum skin test reactivity. Results: Autologous serum skin test was positive in 69 (41.6%) chronic spontaneous urticaria patients. There were no significant differences between autologous serum skin test-positive and autologous serum skin test-negative groups in laboratory findings, such as anti-microsome antibody, anti- thyroglobulin antibody, anti-nuclear antibody, total immunoglobulin E, complement 4 level levels, rheumatoid factor, erythrocyte sedimentation rate and D-dimer. Autologous serum skin test were not related to medication levels. Eight patients (11.6%) of autologous serum skin test-positive groups and 6 patients (6.2%) of autologous serum skin test-negative groups need level 4 medication (usage of cyclosporine, dapsone or anti-immunoglobulin E monoclonal antibody) to control urticaria without statistical significance. Conclusion: Autologous serum skin test was positive in more than 40% of chronic spontaneous urticaria patients. However, laboratory findings and medication levels were not affected by autologous serum skin test reactivity.

횡성지역 천연 소나무와 참나무류 순림 및 혼효임분의 탄소 저장량 추정

이수경 ( Sue Kyoung Lee ),손요환 ( Yow Han Son ),노남진 ( Nam Jin Noh ),허수진 ( Su Jin Heo ),윤태경 ( Tae Kyung Yoon ),이아름 ( An Reum Lee ),( Sarah Abdul Razak ),이우균 ( Woo Kyun Lee ) 한국산림과학회 2009 한국산림과학회지 Vol.98 No.6

영산강유역의 고려시대 평기와 연구

이수경 ( Su Kyoung Lee ) 호남고고학회 2012 湖南考古學報 Vol.40 No.-

본고는 기존의 평기와 연구를 바탕으로 고려시대 영산강유역에서 확인된 평기와의 구체적인 분석을 통하여 시대별 제작기법?타날문양의 특징을 파악하고, 변화과정을 살펴보고자 하였다. 또한 분석결과를 통해 영산강유역 평기와의 기술적 발달과정과 더불어 지역적 성격의 일면을 도출하고자 한다. 이는 향후, 기와연구에 있어 보편적인 특징과 차이점을 규명하기 위한 첫 단계이기도 한다. 이를 위해 우선적으로 영산강유역에서 확인되는 고려시대 유적 현황을 파악한 후 출토된 평기와에서 보이는 속성 등을 세분하였다. 이들 속성을 검토한 결과 그 특징은 다음과 같다. 수키와의 평면형태는 언강이 없는 토수기와에서 언강이 있는 미구기와로의 변화가 확인되었으며, 타날문양은 단독문에서 2∼3가지 문양이 복합되는 복합문으로의 변화가 확인되었다. 제작기법은 중판에서 장판으로의 변화하였으며, 측면분할방법도 한쪽은 외측 다른 한쪽은 내측분할에서 내측분할방법만이 확인되었다. 내면하단부조정도 무조정이거나 깎기에서 물손질 조정으로 변화하였다. 내면기법은 와통의 변화에 따른 윤철흔이 기와 내면에서 확인되는 변화과정을 보이고 있다. 이러한 변화양상을 근거로 영산강유역 고려시대 평기와 출토 유적을 중심으로 제작기법적 속성, 타날문양 등의 분석을 통하여 편년의 근거를 마련하고 시기를 설정하였다. 고려시대 영산강유역의 평기와 출토 유적은 3시기로 구분이 가능하다. 1기는 9세기 전반∼10세기 전반, 2기는 10세기 중엽∼12세기 전반, 3기는 12세기 중엽 이후로 편년하였다. 각 시기별 평기와는 급격한 사회변화로 고고학적 물질문화에 그대로 반영되어 나타나게 되는데, 기와의 변화는 국가의 수공업체제의 변화와 상관관계를 가지고 변화하고 있음을 알 수 있었다. In this study, the analysis of the characteristics of production techniques of the plain roof-tiles, a beating patterns in difference eras and examination of the changing process were performed based on the existing analysis and research done during the Kyoro Dynasty in Yeongsan river basin. In addition, the result of the analysis will help us verify the process of technical development as well as regional characteristics. This will further contribute to the first attempt to depict the general characteristics and differences in the field of roof-tiles research. To do this, the present conditions of the Kyoro dynasty sites in Yeongsan river basin were identified first before subdividing the properties found in the excavated area. The result of the reviewing of these properties was as follows. The flat shape of the a convex roofing tile in non-tiered a convex roofing tile without upper raied spot for put on a convex roofing tile was changed to tiered a convex roofing tile with upper raied spot for put on a convex roofing tile. Also, it has ben identified that a beating patters changed from single pattern to two to three patters in a compound pattern. The production technique also changed from med-sized plate to a floor. Lateral separation method used outer side on one side and the other side used only inner separation method on the inner split. The shift of the plain roof-tile in difference eras reflect the significant changes in the society and archeological materials, however, the change of the tile is certainly in correlation with the change of the trade system .

퍼스널 이미지 확립을 위한 셀프 마케팅 연구

이수경(Lee Su-Kyoung) 한국인체미용예술학회 2003 한국인체미용예술학회지 Vol.4 No.1

  Nowadays, we are struggling in competitions to survive in variously changing industrial societies. There is a common feature among people who have achieved significant success in various fields, that is, they are not the best people in their professional fields. The key to their success can be said to be their selling abilities, and marketing capacities. Therefore, this research focused on surveying the modality and aesthetic values of image making from the viewpoint of changes from the development of industrial societies, that is, from the aspects of technologies and services and from that of socio-psychological contexts related to fashion. This has a significant meaning as a new trial to establish the concept of self-marketing and their characteristics of image making from the viewpoint of marketing.<BR>  This research surveyed personal images from the viewpoint of the socio-psychological features of technologies and service marketing, and established and analyzed self marketing based on document research from the Internet, journals, domestic and foreign books and related scholarship papers etc. related to fashion, image and marketing.<BR>  The results of this research are outlined below:<BR>  Various images have been created due to the expansion of public societies and Mass Medias made by the progress of technologies since the industrial revolution, and fashions became referred to as the most visible products in consumer societies and as a device to express ego and ideas through image making productions.<BR>  Firstly, the theoretical background is as follows.<BR>  Technologies are systemic researches about necessary techniques to make something or to do some task, and are techniques to achieve self purpose through energetic organization of a working process.<BR>  Services are defined as all economic activities to create various value added, which are consumed simultaneously at the process of production, procedure and final results, and are invisible benefits arising from mutual relationships which can"t be stand alone generated.<BR>  Fashions and related clothes are styles and social synchronous phenomena, which many individuals require and accept. The influences of technologies accepted by fashion are classified into two kinds. Changes from the aspects of physical features become important factors to settle the fashion and production of various personal images into mass cultures. Changes from the aspects of mental features are social structure, power groups, changes in group will and image production from Medias.<BR>  Secondly, the concept of self-marketing is all kinds of activities to upgrade value recognition towards themselves as soon as they are made as a strategic method to express themselves as social members from the objective position of others.<BR>  Thirdly, the characteristics of self-marketing can be classified into invisibility, extinguishment, non-separateness and changeability.<BR>  Fourthly, marketing methods are direct marketing, which grasp the merits and demerits of one and directly control how to communicate with others, and indirect marketing which are verbal results from that.<BR>  The strategies of self-marketing are 1) setting price goals, 2) recognizing market survey and communication as transferring stages, and 3) creating values.<BR>  As shown above, there are various methods to express and solve according to the personal position in societies and methods to compose one"s own life. People want to be approved of by others and to be excellent ones. But, they also have opposite desires to be stably included in societies.<BR>  Various viewpoints and interests created a new profession, image consultants, and several colleges opened image making and international manners as cultural subjects. We are marketing ourselves in our daily lives throu

온도와 자기력 변화에 따른 자성유체의 열전달 특성 연구

이수경(Su Kyoung Lee),김세영(Saeyoung Kim),권세랑,경세연(Se Yun Kyung),이민서(Min Seo Lee),이하윤(Ha Yun Lee),김지은(Ji Eun Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

닫힌 사슬운동과 병행된 중간볼기근의 기능적 전기자극이 편마비환자의 보행에 미치는 효과

이수경 ( Su Kyoung Lee ),박민철 ( Min Chull Park ),심제명 ( Je Myung Shim ),김경 ( Kyung Kim ) 대한물리의학회 2011 대한물리의학회지 Vol.6 No.1

Purpose:The purpose of this study was to find out the effect of closed kinetic chain exercise with functional electrical stimulation(FES) of the gluteus medius on gait in stroke. Methods:30 hemiplegic patients voluntarily participated in this study. Subjects were divided into experimental group (n=15) and control group (n=15). Experimental group was given closed kinetic chain exercise with FES of the gluteus medius and control group was given only closed kinetic chain exercise for 4 weeks. All subjects were measured 10m-walking speed, cadence, functional walking category (FAC) and modified motor assessment scale (MMAS) before and after intervention. Results:In experimental group, gait velocity, cadence, FAC and MMAS showed significant difference between pre and post test(p<05). In control group, gait velocity, cadence and FAC showed significant difference between pre and post test (p<.05). Before intervention, gait velocity, cadence, FAC and MMAS were not significant difference between experimental group and control group (p>.05), but after intervention, gait velocity, FAC and MMAS were significant difference (p<.05). Conclusion:This study show that closed kinetic chain exercise with functional electrical stimulation(FES) of the gluteus medius is beneficial intervention for increase the wlking ability in stroke.