• 대한핵의학회지
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• 제29권1호
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• pp.31-40
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• 1995

휴식/부하 Rb-82 PET으로 평가한 심근혈류와 부하/휴식 Tc-99m-MIBI SPECT 심근혈류평가소견을 비교하였다. 관상동맥질환에 이환된 23명의 환자와 6명의 정상인에서 휴식기 Rb-82 PET을 촬영한후 디피리다몰 부하를 가하면서 Rb-82 PET을 촬영하고 Rb-82주사와 동시에 주사한 Tc-99m-MIBI의 SPECT를 1시간 후 촬영하였다. 4시간 후에는 휴식기 Tc-99m-MIBI SPECT 촬영을 하였다. 수직, 수평장축과 세 단축상에서 29개의 분절들의 관류점수를 정상부터 결손까지 5개 등급으로 나누어 점수판정하고 동맥영역별 점수는 합산한 값을 영역의 점수로 삼았는데 점수 2점인 분절이 둘 이상 또는 3점인 분절이 하나이상일 때 해당 관상동맥의 협착이 유의하다고 보았다. 46개의 동맥영역이 협착된 동맥에 의해 혈류공급을 받는 심근인데 이중 78%가 Rb-82 PET에서 확인되었고, 67%가 Tc-99m-MIBI SPECT에 이상을 나타냈다. 12명환자는 CABG 수술후의 환자였는데 이환동맥 28개 영역 중 14 영역이 Rb-82와 Tc-99m-MIBI에 모두 정상으로 판명되었다. 부하기심근분절은 모두 709 분절이 비교가능하였는데 이중 Rb-82와 Tc-99m-MIBI 분절혈류점수가 일치한 것이 72%이었고 휴식기 825 분절중에는 80%가 점수등급이 일치하였다. 휴식기 Rb-82 혈류점수가 Tc-99m-MIBI 보다 작은 경우가 9%, 큰 경우가 11%이었고 부하기 Rb-82 점수가 Tc-99m-MIBI보다 작은 경우가 9%, 큰 경우가 20%이었다. Spearman의 순서상관 분석에 Rb-82 PET의 분절점수와 Tc-99m-MIBI SPECT의 분절점수 사이에 구한 상관계수 rho는 부하기에는 0.7(p<0.005), 휴식기에는 0.5(p<0.005) 이었다. 기울기는 Tc-99m-MIBI SPECT 분절점수/Rb-82 PET분절점수로 표현한 상관기울기는 부하기 0.7, 휴식기에 0.9이었다. 좌전하행동맥영역의 기울기는 Tc-99m-MIBI SPECT/Rb-82 PET 분절점수비로서 1보다 컸고 46동맥중에서 7동맥영역이 Tc-99m-MIBI SPECT 에서 휴식기 결손의 정도가 심했다. 부하기와 휴식기의 점수의 차가 허혈정도를 나타낸다 할 때 Rb-82 PET에 더 크게 나타났다. 이 심근분절혈류감소 비교 결과로 보아 Rb-82 심관관류 PET 검사가 하루안에 시행하는 부하/휴식순서의 Tc-99m-MIBI 심관관류, SPECT 보다 더 큰 허혈부위를 찾아주며, 부하 4시간후 휴식기 Tc-99m-MIBI SPECT에 휴식기 Rb-82 PET 보다 더 큰 결손이 관찰됨을 알았다.

• 한국해양공학회지
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• 제15권4호
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• pp.92-100
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• 2001

It is very important to determine the coefficient of earth pressure at rest accurately in order to estimate the behavior of soil structure. For estimation of K/sub 0/-value depending upon the stress history of dry sand, a new type of K/sub 0/-oedeometer apparatus is devised, and the horizontal earth pressure is accurately measured. For this study, 2 types of one-cyclic K/sub 0/-Loading/unloading models have been studied experimentally using four relative densities of the sand. The results obtained in this test are as follows : K/sub on'/ the coefficient of earth pressure at - rest for virgin loading is a function of the angle of internal friction Φ' of the sand and is determined as K/sub on/=1 - 0.914 sin Φ', K/sub ou'/ the coefficient of earth pressure at rest for virgin unloading is a function of K/sub on/ and over consolidation ratio(OCR), and is determined as K/sub ou/=K/sub on/(OCR)K/sup a/. The exponent α, increases as the relative density increases. K/sub or'/ the coefficient of earth pressure at rest for virgin reloading decreases in hyperbola type as the vertical stress, σ/sub v/’, increases. And, the stress path at virgin reloading leads to the maximum prestress point, independent upon the value of the minimum unloading stress. The gradient of this curve, m/sub r/ increases as OCR increases.

• 한국도서관정보학회지
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• 제38권3호
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• pp.297-320
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• 2007

본 연구에서는 SOA와 웹서비스의 개념을 살펴보았고, SOA를 구현하는 웹서비스의 주요 프로토콜인 SOAP, REST, SRW/U, OAI-PMH에 대한 기술을 분석하였으며, 국내외 도서관에서 SOAP과 REST 기반 웹서비스 구축사례를 각각 제시하였다. 또한 국내외 도서관에서 Web 2.0 기술을 활용한 Library 2.0 적용사례와 SOA 기반 웹서비스 프로토콜의 Library 2.0 적용방법을 제시하였다. 마지막으로 REST 기반 Open API를 이용하여 도서관 OPAC, 온라인서점, 웹 포털, 종합목록 등을 결합한 메타검색 시스템의 구축과 활용을 통한 Library 2.0 적용방안을 제안하였다.

• 대한기계학회논문집B
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• 제24권8호
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• pp.1056-1061
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• 2000

Particles existing in a hard disk drive are known as a major source of TA(thermal asperity). Researchers have investigated how particles induce the TA phenomena, but have not verified yet the reason why and how particles are generated in a HDD. The objective of this study is to investigate why and how particles are generated, and in what condition, the largest number of particles is generated. The number of particles generated in a HDD was measured over the landing zone after various rest times of slider and during various motions and positions of slider. It is found that the large number of particles was generated when the HDD was turned on after a long rest time of slider and that a few of particles were continuously generated when the slider flied over the disk surface. It is thought that the number of particles generated in a HDD was related to the rest time of slider because the rest time of slider increased stiction, and that there were intermittent contacts between the slider and the disk surface when the slider flied over the disk surface.

• 성인간호학회지
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• 제28권1호
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• pp.53-60
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• 2016

Purpose: This study was to compare the effects of early ambulation to usual care of late ambulation in patients with transarterial chemoembolization on back pain, discomfort, and puncture site complications. Methods: A nonequivalent control pretest-posttest design was used. Total 40 patients were recruited from a gastrointestinal unit of an urban general hospital in Seoul, South Korea. The experimental group began to ambulate after 4 hours of bed rest with a compression bandage after receiving transarterial chemoembolization. The control group stayed in bed with a compression bandage overnight. Results: Back pain was not significantly different between the two group. The experimental group reported significantly lower discomfort than the control group. There was no incidence of bleeding complications on puncture site between two groups. Conclusion: The results of this study showed that early ambulation with four hours of bed rest after femoral sheet removal did not cause bleeding complications compared to the usual care and even decreased patients' level of discomfort due to bed rest. Repetitive research on the effect of short bed rest is warranted for its clinical utilization.

• The Journal of Korean Physical Therapy
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• 제12권3호
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• pp.379-386
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• 2000

This study is aimed to determine the cardiovascular function response to maximal exercise of chronic low back pain patients(N=13) and normal group(N=13). by using BRUCE PROTOCOL, subjects underwent tredmill exercise test. Their cardiovascular function responses during rest and after maximal exercise were compared The responses were analyzed using t-test for SPSS 7.0 program. The Cardiovascular function variables employed at rest time(Vo2, HR. Vo2/kg, VE, Vco2.) and all out time(Vo2peak. HRpeak, Vo2peak/kg, VEpeak. Vco2peak). Result show that : 1 There was no significant difference in Vo2 between chronic low back pain patients and normal group at rest time. However significant difference in Volpeak was observed after maximal exercise( p<.05). 2. There was no significant difference in HR between chronic low back pain patients and normal group at rest time. No significant difference in HRpeak likewise observed. 3. There was no significant difference in Vo2/kg between chronic low back pain patients and normal group at rest time. However significant difference in Vo2peak/kg was observed after maximal exercise load(p<.05). 4. There was no significance in VE between chronic low bark pain patients and normal group at rest time. However significant difference in VEpeak observed after maximal exercise load(p<.05).

• Korean Journal of Health Education and Promotion
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• 제2권1호
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• pp.63-78
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• 2000

This survey provides, at a participation rate of 70％, 4,790 examinees. The purpose of this study is to study the association of the failed rest after work with 34 diseases including cardiovascular diseases. The index of the failed rest after work was composed of 4 questions about "thinking of work for several hours", "feeling exhausted", feeling unsatisfied or depressed", and "needing to go to bed early for next day′s work". Estimation of correlation among 4 variables, factor analysis, and ANCOVA adjusted for sex, age and job were carried out. A self-rating questionnaire of one′s own disease history and the "London School of Hygiene Cardiovascular Questionnaire" were used in order to discriminate each morbid group from the opposite group. Brief explanations of the result are as follows: 1) Every variable of failed rest after work shows significant difference between the morbid group and the no morbid group for possible infarction; for angina pectoris in the total, and men. 2) Among 4 variables ′exhaustion′ best discriminates the infarction group from the no infarction group, and the angina group from the no angina group. 3) The factor of failed rest after work is a significant factor that distinguishes the infarction group from the no infarction group, and the angina pectoris group from the no angina group. Therefore, stress management through health education and promotion such as behavioral modification can be used to reduce cardiovascular diseases and stress as perceived by an individual.

• 한국환경복원기술학회지
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• 제13권5호
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• pp.172-179
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• 2010

This study was conducted to establish a management plan for the Songrim woodland restoration by analyzing the site characteristics of the Songrim Woodland Natural Monument (Natural Monument 445) in Hadong-Gun, Gyeongsangnam-Do, Korea. The Songrim woodland was a pure pine forest. To stimulate the growth of sub-trees or mid- story vegetation in both a non-rest year forest and a rest year forest, it is recommended to take a silvicultural practices such as pruning because canopy of over-story trees was closely covered. The Songrim woodland in the non-rest year forest severely competed among individual trees of DBH classes of 60 cm and height of 18 m, while the woodland in the rest-year forest competed with DBH classes of 62 cm and height of 10 m, respectively. Soil physical property such as soil hardness, soil pore space rates, and pF 2.7 was restored following the rest-year forest designation. Mean salt concentration in the Songrim woodland soils was 0.006%. The result suggests that it is needed to take a study to prevent the salt inputs to conserve the Songrim woodland.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 춘계학술발표대회
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• pp.17-20
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• 2012

최근 인터넷의 발달과 함께 웹을 기반으로 하는 클라이언트-서버 분산 구조의 웹서비스 시스템 구조가 점차 확산되고 있다. 게다가, 최근에는 스마트폰을 이용한 스마트폰 애플리케이션이 대중화 되면서, 웹 서비스의 활용이 점차 확대되는 추세이다. 웹을 기반으로 클라이언트와 서버 사이에 통신을 하기 위해서는 원격 프로시저를 정의한 인터페이스가 규정되어야 하며, 기존에는 W3C에서 정의한 WSDL를 사용하여 웹서비스를 기술하곤 하였다. 그러나, 이와 같은 기존의 웹서비스 기술 및 사용방법은 그 구성이 복잡하고 오버헤드가 큰 이유로 널리 활용되지 못하였다. 최근에는 스마트폰이 대중화 되면서 REST 웹서비스의 활용이 확산되는 추세다. SOAP 기반 웹서비스에 대해서는 서비스 조합에 대해서 충분히 다루어 졌으며, 어느정도 정리된 연구분야이다. SOAP 웹서비스는 기계가 인식하기 쉽도록 엄격한 규약과 인터페이스를 정의한 것이기 때문이다. 하지만, REST 웹서비스 조합 방법에 대해서는 현재까지도 충분히 연구되지 않았다. REST 웹서비스는 사람이 사용하기 편리하도록 설계된 기술이고, 그 조합에 대해서는 표준에서 관여하지 않기 때문이다. 본 논문에서는 REST 웹서비스의 기존의 소켓(socket)을 이용한 서버-클라이언트 통신 방법 대신에, REST 웹서비스를 활용하는 서버-클라이언트 스마트폰 앱개발 방법을 제안한다.

• 대한간호
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• 제36권2호
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• pp.73-83
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• 1997

Bed rest is recommended to prevent postlumbar puncture headaches(PLPHA), but the period of bed rest varies in the literature from 6 hours to 24 hours. In clinical practice the period of bed rest varies but nursing methods for adults and children have little difference. In Seoul National University Hospital, children have been given at least 6 hours bed rest after a lumbar puncture. Pediatric oncology patients require a lumbar puncture for an initial diagnosis, follow up treatment or administration of chemotherapeutic agent. But it is difficult for young children to lie supine or to refrain from their usual activities in any way, and unpleasant problems related to a shortage of beds often occurs during discharge or in an outpatient setting. The purpose of this study is to substantiate the preventive effect of PLPHA by the period of bed rest, to identify the other factors that influence PLPHA, and to use the nursing methods proper to children. The subjects were 65 children, ages 1-17, undergoing treatment in the children's cancer center at SNUCH during the period June 1, 1995, to Aug. 31, 1995. The team nurses asked questions about PLPHA of the parents and children in order to fill out a questionnaire. The data were evaluated by percent, t-test, Chi-square test and Mann-Whitney U test. Result; 1. There was no significant difference relating the bed rest time spent to the occurrence of postspinal headaches (t-test). 2. There was a significant risk of PLPHA in the children who were irritable before procedure and/or had experienced previous PLPHA(p<0.05, ${x^2}-test$). 3. The following factors were not found to be associated with increased risk of PLPHA: previous puncture experience, giving analgesics, the choice of puncturist, inpatient/outpatient status, gauge of needle, purpose, the amount of CSF removed, gender, diagnosis, the number of peripheral WBCs, previous lumbago experience after LP, position after bed rest, age, the number of aural puncture at the time. A longer period of bed rest is unlikely to be more effective to prevent PLPHA and seems impractical. A shorter period will save time and effort. Perhaps it will also allay some of the fears which surround LP. So 1 hour bed rest after LP is suggested and nursing methods for emotional support should be investigated to reduce PLPH.