Paleoclimate reconstruction using geochemical tracers

한국해양연구

A Study of Correlation Between Early Urinary Incontinence and Rehabilitation Outcome in Stroke Patients

의학과/석사[영문] [한글] 뇌졸중 환자의 초기 요실금과 재활치료의 결과와의 상관관계를 알아보고자 한 본 연구 에서 저자는 1987년 1월 1일부터 1990년 1월 31일까지 연세대학교 의과대학 세브란스병원 재활의학과에 입원하여 포괄적인 재활 치료를 받고 퇴원한 뇌졸중 환자 91명을 대상으로 의무기록지, 물리치료 기록지, 및 작업치료기록지를 검토하였다. 초기 요실금이 있는 59 명을 요실금군으로, 요실금이 없는 32명을 대조군으로 하여 대상환자의 연령, 성별, 입원 기간, 뇌수술여부, 입·퇴원시의 Barthel 점수 및 보행상태, 초기 요실금의 기간 및 정도 그리고 유치도뇨관 삽입기간을 조사하여 초기 요실금의 발생률 그리고 초기 요실금과 재 활후의 일상 생활 동작 수행능력, 보행 상태 및 입원기간과의 상관관계를 알아보아 다음 과 같은 결과를 얻었다. 1. 뇌졸중 환자의 초기 요실금의 발생률은 64.8%이었다. 2. 뇌졸중 환자의 연령, 성별, 뇌병소의 성질, 뇌 수술여부 그리고 발병 초기의 유치도 뇨관 삽입기간은 두 군간에 차이가 없었다. 3. 요실금군에서 재활후 일상생활동작 수행능력과 보행상태는 나빴으며, 입원기간은 길 었고 회복이 늦었다. 4. 뇌졸중 환자의 조기 요실금의 기간이 길수록 그리고 정도가 심할수록 재활후 얻을 수 있는 일상생활동작 수행능력 및 보행상태가 낮았고, 입원기간은 길었다. 이와 같은 결과는 뇌졸중 환자의 재활계획 수립에 도움이 될 수 있다고 생각된다. A Study of Correlation Between Early Urinary Incontinence and Rehabilitation Outcome in Stroke Patients Byung Gwon Park Department of Medical Science, The Graduate School, Yonsei University (Directed by Professor Sae Il Chun, M.D.) Early urinary incontinence is an important complication of stroke because it causes personal distress and lowering of functional outcome. The aim of this study is to demonstrate the correlation of early urinary incontinence and rehabilitation outcome of stroke patients. The subjects of this study were 91 stroke patients who were admitted to the Department of Rehabilitation Medicine, Yonsei University College of Medicine, and managed with comprehensive rehabilitative treatment between January 1, 1987 and January 31, 1990. Medical records were reviewed and data such as age, sex, hospital days, effect of operation, Barthel score, ambulation status at admission and discharge and duration of Foley insertion were surveyed. The study group consisted of 59 stroke patients who had urinary incontinence of early onset, and a control group of 32 stroke patients without urinary incontinence. The incidence of early urinary incontinence and correlation between early urinary incontinence and activities of daily living, ambulation status and hospital days after rehabilitation was determined stastically. 1. An incidence of early urinary incontinence was 64.8%. 2. There were no differences in age, sex, properties of brain lesion, effect of operation and duration of Foley insertion between the two groups. 3. In the urinary incontinence group, post rehabilitation Barthel score of activities of daily living and ambulation status were poor and hospital days were prolonged. 4. Comparison of pre and post rehabilitation status in activities of daily living and ambulation showed little improvement in the urinary incontinence group. 5. The overall severity was greater, the activities of daily living and ambulation status was lower and the length of hospital days was longer in stroke patients with early urinary incontinence. This knowledge could be helpful in planning stroke rehabilitation programs.restrictio

Paleoclimate reconstruction using geochemical tracers

한국해양연구

Species diversity of planktonic foraminifera in the East Sea

22othe

Alternative mode of Quaternary sedimentary processes (silica vs. carbonate ocean): a perspective from the East Sea (Japan Sea)

Previous data from East Sea (Sea of Japan ) sediment cores show that the biogenic fractions such as organic matter, carbonate and biogenic opal exhibit large fluctuation. Especially, during glacial and interglacial period the content of carbonate and biogenic opal show cyclic variation, but carbonate and biogenic silica contents vary inversely. Data from the Ulleung Basin (cores 97PC-19 and 94PC-2) and Korea Plateau (96EBP4) show that carbonate content increases during glacial intervals and decreases during interglacials, whereas biogenic silica increases during interglacial intervals and decreases during glacial intervals. It is proposed that this distinctive pattern results from alternating states of the ocean system. The obvious inverse correlation between carbonate and biogenic silica content supports the idea of two mutually exclusive modes of biogenic pelagic sediment accumulation. Cores from East Sea locations where the sea floor is deeper than the carbonate compensation depth contain no such alternate modes, suggesting that carbonate dissolution or dilution by terrigenous material has taken place.1

Conjunctive Boolean Query Optimization based onJoin Sequence Separability in Information Retrieval Systems

논리곱 불리언 질의는 질의에 포함된 키워드들이 모두 나타나는 텍스트 문서들을 검색하는질의로서, 정보검색 시스템에서 가장 널리 사용되는 질의이다. 논리곱 불리언 질의는 검색의 정확도를 높이기 위하여 많은 수의 키워드로 구성된 긴 질의를 사용한다. 이 경우, 키워드 처리 순서가 성능에 크게 영향을 미친다. 기존 정보검색시스템에서는 휴리스틱에 의존하여 키워드 처리 순서를 결정하므로 최적을 보장하지 못한다. 동적 프로그래밍과 같은 기존의 데이타베이스 질의 최적화 알고리즘은 복잡도가 지수적으로 증가하므로(O(n2n-1)), 키워드 수가 많은 논리곱 불리언 질의에는 적합하지 않다. 본 논문에서는 조인 시퀀스 분리성이라는 새로운 개념에 기반한 논리곱 불리언 질의 최적화 알고리즘을 제안한다. 조인 시퀀스 분리성이란 조인에 참여하는 릴레이션들이 어떤 조건을 만족할 경우, 최적 조인 시퀀스가 두 개의 서브 시퀀스로 분리된다는 성질이다. 이 성질을 활용하면 O(nlogn)만에 최적 조인 시퀀스를 구할 수 있다. 본 논문에서는 이러한 조인 시퀀스 분리성의 개념을 정형적으로 정의하고 이에 기반한 질의 최적화 알고리즘의 최적성을 이론적으로 증명한다. 그리고, 제안한 질의 최적화 알고리즘의 성능 평가를 위해, 비용 모델을 사용하여 다양한 시뮬레이션을 수행한다. 그 결과, 제안한 알고리즘의 성능이 기존의 휴리스틱 기반 질의 최적화 알고리즘들에 비해 100배 이상 우수함을 보인다. 또한, 동적 프로그래밍 알고리즘에 비해 질의 최적화 시간 면에서 기하 급수적으로 우수함을 보인다(키워드 개수가 10 개일 경우 600배 이상 우수함)

Seawater d180 and water mass identification in the western Weddell Sea, Antarctic Ocean

22othe

Paleoceanographic Records from the Northern Shelf of the East China Sea since the Last Glacial Maximum

Both benthic and planktonic foraminifera from Core 97-02 obtained in the northern East China Sea are quantitatively analyzed for reconstructing the paleocenography of late Quaternary. Since the earliest time of the core sediment (last not older than 18000 yr B.P.), the paleo-water depth has changed from less than 20 m to near 100 m at present, which is reflected by the benthic foraminiferal assemblages: before 14000 yr B.P., the water depth was shallower than 20 m; from 14000 to 7500 yr B.P., water depth was 20-50 m; and after 7500 yr B.P., water depth was 50-100 m. The foraminiferal fauna also disclose the water mass history: during the last glacial maximum, the water that dominated the study area might be the coastal water; at the end of the last glacial maximum(14000-9500 yr B.P.), the Yellow Sea Cold Water mostly affected this area; then it gave way to the Yellow Sea Warm Current after 9500 yr B.P.; and finally, the warm water has dominated this area since 9500 yr B.P. because of the westward shift and enhancement of the Kuroshio Current.33Nkciothe

Introduction to newly formed Korean research program of \\\\'East Asia Monsoon evolution and paleoclimate changes adjacent to Korean Peninsula

Korea Ocean Research & Development Institute (KORDI) develops on three year research program which titled on East Asia Monsoon evolution and paleoclimate changes adjacent to Korean Peninsula. This program will be covered on wide area through the East Asia including East Sea (Sea of Japan), East China Sea, aeolian dust fields and Inland lakes such as Upo in Korea, Bikal in Russia and Biwa in Japan. The program has not only focused on reconstruction of paleoclimate and monsoon history from the long core sediments since late Cenozoic but also delineate to paleoclimate numerical model during the mid-Holocene and the Last Glacial Maximum (LGM). In the 1st year, we had 5 piston cores from the East Sea with different water depths from 667m to 2,247m deep, and will analyze to each geological, geochemical and paleontological components to reconstruct paleoenvironments and paleoclimatic evolution. In case of model study, there have been many studies of the monsoon circulation changes during the mid-Holocene and the Last Glacial Maximum (LGM) using numerical models. The models used in the previous studies, however, have relatively low resolutions (usually greater than 200 km) and they cannot represent detailed regional climate change features like the monsoon. In order to capture detailed features of the Asian monsoon circulation and associated climate changes, this study adopts a high-resolution climate model and attempts to investigate the mechanism which is responsible for the change in wind fields and precipitation during the mid-Holocen and the LGM. Proposed three year research program from KORDI is shown in following project road map in detail.1