셀룰러망에서 이동호스트의 이동성 예측을 위한 혼합 기법

권오승,김명일,김성조 중앙대학교정보통신연구소 2002 정보통신연구소논문집 Vol.4 No.1

이동 컴퓨팅 환경에서는 무선 단말기 사용자의 이동에 따른 접속 단절 현상이 발생할 수 있다. 이러한 이동 컴퓨팅 환경에서 끊김 없는 핸드 오프와 효율적인 호 수락 제어를 지원하기 위해서 사용자의 이동성 예측이 필요하다. 따라서, 본 논문에서는 사용자의 이동성을 규칙적인 패턴과 임의적인 패턴으로 분류하고, 규칙적인 이동패턴을 예측하기 위하여 사용자의 과거 이동경로를 분석하며, 임의적인 이동패턴은 GPS의 정보를 이용하여 이동성을 예측한다. 이러한 예측 기법은 무선 단말기 사용자의 속도가 매우 빠르거나, 셀룰러 망의 셀의 크기가 작은 경우에 보다 효율적으로 이동성을 예측할 수 있다는 장점이 있다. The disconnection between users and base station may occur in mobile computing environment. Mobility prediction of mobile host is important for supporting seamless handoff and effective call admission control(CAC) in wireless cellular networks. In this paper, therefore history and GPS(Global Positioning System) information. We classify mobility into regular part and random part using mobility pattern history and GPS information, respectively. This proposed scheme effectively predict mobility for high speed mobile host and small cell size.

Thiamine결핍 유도후 쥐 전뇌의 성상교세포 Glial Fibrillary Acidic Protein(GFAP) 면역화학 활성도에 대한 변화

김승현,김희태,김주한,김명호,황세진,김명권,백태경 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

젊은 성인에서 신체 만족도에 따른 문제해결양식, 대인관계문제와 우울증상과 자살사고와의 관련성

차승민,김태성,강문희,권명진,김정란,왕성근,지익성 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:The aim of this study was to evaluate that problem solving styles, interpersonal problems, depression and suicidal ideation according to body image satisfaction. Methods:One hundred and nineteen young healthy normal subjects filled out administered the Body Dysmorphic Disorder Examination-Self Report (Korean version of BDDE-SR K-BDDE-SR), Problem Solving Style Scale(Korean version PSS), Korean Inventory of Interpersonal Problem(KIIP), Korean version of the Depression Anxiety Stress Scale(KDASS-21), Korean version of Beck Scale for Suicidal Ideation(Korean version SSI) and Korean version of Reynolds Suicidal Ideation Questionnaire(Korean version SIQ) for a month. Results:Out of the 119 subjects, 39%(N=46) was male and 61%(N=73) was female. In high K-BDDE-SR group (higher than 67), helplessness was significantly higher than low K-BDDE-SR group(lower than 67), and problem-solving confidence, creative style, approach style were significantly lower than low K-BDDE-SR group. Also, Higher level of all KIIP factors in High K-BDDE-SR group was significantly differ than low K-BDDE-SR group. In High K-BDDE-SR group, K-DASS-21, SSI, and SIQ were significantly higher than low K-BDDE-SR group. Using multiple regression analysis contributing variance toward the total factor score of K-BDDE-SR of participants were K-DASS-21 and SIQ. Conclusion:Our results indicates that high tendency of dissatisfied body images have differences in helplessness, problem-solving confidence, approach style, interpersonal problems, depression and suicidal ideation compared to low tendency of dissatisfied body images. It is necessary to study body dysmorphic disorder patients group in the future.

Dense Kondo 계인 CeTe의 광학적 성질

정명화,김재민,권용성 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1

Dense Kondo계인 CeTe와 정상금속인 LaTe의 크기 양질인 단결정을 개선된 Bridgeman방법으로 성장시켰다. 이 단결정을 이용하여 0.05∼8eV의 광범위한 에너지 영역에서 반사율을 측정하여, Kramers-Kronig변환을 통해 광학전도도를 얻었다. 광학전도도의 스펙트럼을 분석한 결과, CeTe와 LaTe의 경우 모두 p-d 전이에 의한 두 개의 피크가 3.6eV와 5.1eV에서 발견되었다. 이 두 피크의 형성 mechanism은 5d-band의 입방결정장에 의한 것임을 알았다. 그리고 CeTe의 경우는 LaTe에 없었던 4f-5d전이에 의한 피크가 0.4eV에서 발견되었다. 이는 XPS 스펙트럼으로부터 얻은 bare 4f-전자의 binding 에너지(약 1.5eV)에 비해 매우 작은 값이다. 이 편차는 local field를 고려한 Lorentz모델을 적용함으로서 잘 설명되었다. 또한, localization의 정도로 약 0.4의 값을 얻었다. 끝으로, 띠내전이의 해석으로부터 LaTe의 경우보다 CeTe의 경우가 전도전자의 유효질량이 무겁다는 사실을 얻었다. 이것으로부터 CeTe의 여기상태인 Γ_8와 전도전자 간의 Kondo 교환상호작용의 에너지가 매우 크다는 것을 알았다. We had grown the high quality single crystals of dense Kondo system CeTe and normal metal LaTe by using the advanced Bridgeman method. The reflectivities of the single crystals were measured in wide energy range from 0.05 to 8eV, and their optical conductivities were obtained using Kramers-Kronig transformation. By the result of their optical conductivity spectra, two peaks due to p-d transition were discovered at about 3.6 and 5.1eV, respectively. The double peaks were explained by cubic crystalline electric field. And in case of CeTe, extraordinary peak due to f-d transition, which LaTe had not, was appeared around 0.4eV. This value was well explained by the Lorentz model considering the local field. The degree of screening due to conduction electrons was evaluated to be about 0.4. The effective mass of conduction electron of CeTe was large compared with that of LaTe. From this, we could obtain the fact that in CeTe, Kondo exchange energy between conduction electron and excited Γ_8 state was very large

光質이 채소作物의 種子發芽와 初期生育 및 除草劑의 活性에 미치는 效果

李政明,金侊來,權臣漢,曺哉銑,朴啓仁,全尙根,李承雨 경희대학교 부설 식량자원개발연구소 1987 硏究論文集 Vol.8 No.-

Studies were conducted to investigate the response of some horticultural plants to various light qualities provided by different kind of materials such as cellophane sheets, EVA, PVC(polyvinyl chloride,. and polyethylene (FE) films of different color. Major findings are summarized as follows. White fluorescence light and red light promoted seed germination of lettuce and inhibited that of radish seeds. Blue light inhibited the seed germination of both types of light-sensitive seeds. The light sensitivity varied considerably depending upon the kind of crops, cultivars, and the seed batches of the same cultivar. The blue light was equally or more strongly effective in inhibiting the seed germination as compared to the farred light. The growth of young seedlings developed from seeds was considerably promoted when grown under orange colored plastic film coverings The growth of larger seedlings was, however. not influenced by the color of plastic films Mulching pepper field with colored PVC film did not show further advantages over the commonly -used black PE film. Herbicidal activity of oxyfluorfen was very strong under natural light or red light conditions, and weak under blue or green light conditions The degree of oxyfluorfen-induced phytotoxicity varied considerably depending upon the light quality and the kind of vegetable crops.

안내염과 대장암이 동반된 재발성 간농양

전승정,김태헌,류민선,오다연,송명은,이신아,류재인,김혜인,문일환,유권 이화여자대학교 의과학연구소 2011 EMJ (Ewha medical journal) Vol.34 No.2

The causes of pyogenic liver abscess has been known as biliary tract disease or intrabadominal infection but the large proportions of the patients has no apparent underlying disorders. Recently colonic mucosal lesions were reported in patients with cryptogenic liver abscess and it has been suggested that colonic mucosal break may play a role in developing liver abscess in otherwise healthy patients. We experienced a patient of severe recurrent liver abscess complicated with endophthalmitis only 3 months after successful treatment of initial cryptogenic liver abscess and a polypoid colon cancer was discovered by chance. It seems prudent to proceed colonoscopic examination in patients with cryptogenic liver abscess especially when it is recurrent.

光質이 채소作物의 種子發芽와 初期生育 및 除草劑의 活性에 미치는 效果

李政明,金侊來,權臣漢,曺哉銑,朴啓仁,金尙根,李承雨 慶熙大學校 1987 論文集 Vol.16 No.-

Studies were conducted to investigate the response of some horticultural plants to various light qualities provided by different kind of materials such as cellophane sheets, EVA, PVC(polyvinyl chloride, and polyethylene (PE) films of different color. Major findings are summarized as follows. White fluorescence light and red light promoted seed germination of lettuce and inhibited that of radish seeds. Blue light inhibited the seed germination of both types of light-sensitive seeds. The light sensitivity varied considerably depending upon the kind of crops, cultivars, and the seed batches of the same cultivar. The blue light was equally or more strongly effective in inhibiting the seed germination as compared to the farred light. The growth of young seedlings developed from seeds was considerably promoted when grown under orange colored plastic film coverings. The growth of larger seedlings was, however, not influenced by the color of plastic films. Mulching pepper field with colored PVC film did not show further advantages over the commonly-used black PE film. Herbicidal activity of oxyfluorfen was very strong under natural light or red light conditions' and weak under blue or green light conditions. The degree of oxyfluorfen-induced phytotoxicity varied considerably depending upon the light quality and the kind of vegetable crops.

김치식이가 흰쥐의 항산화시스템에 미치는 영향

류승희,권명자,송영옥,송영선,문갑순 인제대학교 2003 仁濟論叢 Vol.18 No.1

김치는 배추를 주재료로 하여 마늘, 고추, 생강 등의 양념류를 포함하는 여러 재료들로 만들어지며 이들 재료 중에는 항산화효과를 가진 것으로 알려진 성분들이 많이 함유되어 있어 김치도 항산화효과를 나타낼 것으로 여겨진다. In vitro 실험계 및 세포 모델계에서 김치 재료 및 김치의 항산화효과는 확인된바 있으나 In vivo 시스템에서의 김치의 항산화효과에 관한 자료는 부족하다. 따라서 본 실험에서는 김치 섭취의 생체 내 항산화효과를 규명하기 위하여 흰쥐에게 동결건조한 김치 3, 5, 10% 첨가 식이를 6주간 섭취시키면서 간조직의 산화와 항산화효소계의 활성을 측정하였다. 간의 MDA 함량은 대조군에 비해 김치 투여군에서 낮았고 특히 5% 김치섭취군에서 현저히 낮은 값을 나타내었다. 단백질 산화를 나타내는 카르보닐 함량도 대조군에 비해 김치섭취군에서 낮아 생체 내에서 김치식이가 과산화물 생성 억제효과를 나타내었다. 항산화 효소계의 활성을 측정한 결과 SOD 활성은 대조군에 비해 김치섭취군에서 현저하게 높았고 김치첨가 함량이 증가할수록 SOD 활성이 유의적으로 높아져 10% 김치섭취군에서는 대조군에 비해 70% 이상 높은 활성을 나타내었다. Catalase 활성은 각 군에서 유의적인 차이가 나타나지 않았으나 GSH-px의 활성은 김치 섭취가 높을수록 상대적으로 높은 증가율을 나타내어 SOD 활성과 동일한 경향을 나타내었다. 따라서 김치식이는 생체 내에서 치질 및 단백질 과산화를 현저하게 억제하였고 항산화효소계인 SOD와 GSH-px의 활성을 농도의존적으로 증진시켜 김치식이가 체내의 산화적 스트레스를 효과적으로 억제하는데 기여함을 알 수 있었다. Kimchi is a Kruean traditional fermented food containing various ingredients such as Chinese cabbage, garlic, ginger, red pepper and fish sauce. Some of their components were known as its antioxidative activities and antioxidative effects of kimchi have been studied using in vitro and cell model system. To investigate the antioxidative effect of dietary kimchi, 4 groups of male S.D. rats (n=36) were fed 0, 3%, 5%, and 10% freeze-dried kimchi for 6 weeks and hepatic lipid peroxidation, protein oxidation and the activities of antioxidative enzymes were measured. Hepatic MDA content fed kimchi diet was lower than control diet. Protein carbonyl values were decreased in kimchi diet group, but not significant. SOD activities were significantly increased in kimchi added groups at dose-dependent manner. At 10% kimchi added group, SOD activity increased by 70% compared with control diet group. Catalase activities were not different between experimental groups and control group, whereas GSH-px activities were significantly increased in kimchi added group. As a result kimchi diet inhibited lipid and protein oxidation and induced antioxidative enzymes, SOD and GSH-px in rat hepatic tissue. It suggests that dietary kimchi is expected to prevent the oxidative stress in animal and human.

참외주스 가열농축에 따른 관능적 특성 변화

이기동,권승혁,이명희,김숙경,주길재,권중호 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2004 한국식품저장유통학회지 Vol.11 No.1

고품질 참외 농축액을 제조하기 위해 농축공정에서 중요한 변수로 작용하는 가열시간을 달리하면서 제조한 농축물에 대한 관능적 평가를 실시한 결과, 가열 후 맛이 최대평점을 나타낸 조건은 가열온도가 96.63 ℃ 및 가열시간이 14.31 min일 때 였으며, 전반적인 기호도가 가장 높은 조건은 가열온도가 97.18℃ 및 가열시간이 14.55 min 일 때 였다. 가열온도 및 가열시간을 달리하면서 실험한 결과 참외 농축액 제조를 위해서는 가열온도 98℃로, 가열시간 13 min으로 처리하는 것이 적당하였다. This study was carried out to observe the change of organoleptic properties of the juice prepared with various heating temperature and heating time. Organoleptic color showed maximum value at 94.95℃ and 21.63 min and organoleptic aroma showed maximum value at 63.14℃ and 20.38 min. Organoleptic taste showed maximum value at 96.63℃ and 14.31 min and overall palatability showed maximum value at 97.18℃ and 14.55 min The best condition was 98℃(heating temperature) and 13 min(heating time) at oragnoleptic evaluation of oriental melon juice.

Fosfomycin의 항균효과 및 capillary electrophoresis에 의한 측정법에 관한 연구

윤효인,박승춘,이규승,권진욱,조준형,신광순,김무열,허강준,조명행 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-

Fosfomycin, a low molecular antibiotic, is to be easily synthesized, therefore to be possibly used in veterinary sectors due to econimic reasons. In this study, we determined the antibacterial activities of fosfomycin against some domestic animal-origin pathogens, and its combined effects with some important antibacterials available. We also compared detection methods of fosfomycin from various measuring instruments. The results obtained through this experiment were as follows: 1. Antibacterial activities of fosfomycin against the pathogens used in this experiment were appeared fairly low. We found the antobacterial activities depanded on the kinds of media and the addition of some material thereins, which suggests the importance of appropriate medium so as to judge the antibacterial activity of fosfomycin. 2. Fosfomycin showed varying antibacterial effects in combination with other antibacterials, which should be taken into consideration when combining other antobacterials especially in the clinical settings. Of the combined antivacterials, fosfomycin had synergistic effects in combination with amoxicillin but antagonistic effects with oxytetracyline. 3. Conventional detection methods using HPLC, GC and spectrophotometer were not appropriate to measure fosfomycin. Capillary electrophoresis by the way of the indirect ultraviolet detection method was good enough to detect fosfomycin in the range of expected concentration in tissues, with the limit of quantitation (LOQ) of 1.25 ㎍/㎖. We recommend the eletrophoresis method could be used to detect fosfomycin, thereby being able to set the optimal dosage for animals and providing the measures in relation with the residual concentration in the meat.