사지골절 후 관절 운동제한에 관한 물리치료의 임상적 고찰

이재학,Lee, Jae-Hak 대한물리치료사협회 1988 대한물리치료사협회지 Vol.9 No.1

아시아 디아스포라와 라틴아메리카: 차별과 갈등에서 현지 적응까지

이재학 한국외국어대학교 중남미연구소 2022 중남미연구 Vol.41 No.1

This paper investigates the Asian Diaspora to Latin America from 16th century to 21st century focusing on the discrimination, racial conflict and assimilation. The Manila-Acapulco galleon trade started in 1571 triggered the Asian immigration to the New World. After the independence of Latin American countries in 19th century, their need for the Asian cheap labor brought the Chinese coolies and Japanese farmers to Latin American counries such as Brasil, Peru and Mexico. The Koreans were the latest group which joined the international labor migration and the number of Korean immigrants in Latin America is much smaller than that of Chinese and Japanese immigrants. While Chines and Japanese communities have been assimilated to the Latin American society, Koreans still maintain their strong cultural heritage as Korean. 16세기말에 시작된 마닐라-아카풀코 갤리언 무역으로 인해 화교를 비롯한 아시아인들의 신대륙 이주가 시작되었다. 19세기에 들어와 산업자본주의의 발달과 이에 따른 국제노동시장 구조의 재편으로 값싼 아시아 노동력에 대한 수요가 발생하면서 화교 및 일본인 계약노동자들이 라틴아메리카로 이주하였으며, 20세기 초에 한인들이 그 뒤를 이었다. 1962년에 해외이민법이 제정되면서 한인들의 라틴아메리카 농업이민이 시작되었지만 실패로 끝나게 되고, 이들 대부분은 도시로 이주하여 의류업에 종사하게 된다. 1980년 중반 이후 집단이민에서 개인이민의 형태로 바뀐 한인들의 라틴아메리카 이주는 21세기 들어와 부상하는 중국의 영향력 및 한류의 영향으로 새로운 전기를 맞고 있다. 이에 본 논문에서는 화교, 일본인 및 한인들의 라틴아메리카 디아스포라에 대해 비교·고찰하고, 이들과 현지사회와의 갈등 및 현지적응 등에 대해 분석하도록 한다.

언어와 필리핀 국가정체성: 타갈로그어, 필리피노, 영어 그리고 스페인어

이재학 한국외국어대학교 중남미연구소 2019 중남미연구 Vol.38 No.4

The National language plays an important role in unifying the different ethnic groups of the country. In case of Philippines the situation is somewhat complicated since the archipelago is composed of more than 7,000 islands and there are hundreds of local dialects spoken by different ethnic groups. There have been long term conflicts to decide which dialect should be the base of the national language. This issue is directly connected to the conflicts between Filipino nationalism and regionalism. After the so called language war, Filipino finally became the national language and the government followed the bilingual education policy. However its policy was soon challenged by the mother tongue-based multilingual policy along with the movement against the neocolonialism. Therefore this paper investigates how the national language policy of Philippines has been changed and how Philippines is building its national identity. 한 국가의 국어는 그것을 사용하는 사람들 간의 유대감과 동질감을 불러옴과 동시에 그들 간의 언어 공동체 의식을 싹트게 함으로써 국가의 통합을 유지시키는데 필수불가결한 요소 중 하나이다. 하지만 백 개 이상의 지역 방언이 존재하는 필리핀에서 어떤 언어를 공용어 및 교육언어(language of instruction)로 정하느냐의 문제는 식민잔재청산 및 국가정체성 확립과 직접적으로 연결되는 매우 민감한 문제이다. 특히 필리핀은 언어정책 및 국가정체성의 문제가 타갈로그어권과 기타 지역의 대립 및 영어 헤게모니에 대한 반발과 맞물리며 오랜 기간 내부적인 갈등을 빚어왔다. 이에 본 논문에서는 필리핀 국어에 대한 논쟁이 어떻게 진행되어 왔으며 오늘날 국가정체성을 확립하기 위한 언어정책이 어떻게 변화하였는지를 타갈로그어, 필리피노, 영어, 스페인어를 중심으로 고찰하고자 한다.

고관절 각도변화에 따른 슬관절 굴곡근의 등장성 근력평가

이재학 高麗大學校 倂設 保健大學 保健科學硏究所 2002 保健科學論集 Vol.28 No.1

Since isotonic exercise equipment can give an evaluation of muscle strength with great accuracy and objectivity, it is widely used as the one of the important methods for evaluation of muscle performance. The purpose of this study were to measure concentric and eccentric muscle strength of knee flexors as the change of hip angle in dominant. Concentric and eccentric muscle strength was assessed by monitoring repetition, peak power, average peak power, average power, peak velocity, average peak velocity, peak force, average peak force, and total work for knee flexors using the EN-TreeM isotonic dynamometer. For this forty healthy subjects, 20 males and 20 females, performed knee motion at 74.89% of their 1RM with 90˚, 45˚and 0˚flexion of their hip angle. The results were as follow. 1. All the values tested in male were greater than those in female. 2. The repetition, peak power and peak force of concentric and eccentric contraction showed a significant increase in order of 0˚ 45˚ 90˚hip angle in males and females. 3. The average peak power, peak velocity and average peak velocity of concentric and eccentric contraction showed a significant increase in order of 0˚ 90˚ 45˚hip angle in males and females. 4. The average peak force, average power and total work of concentric and eccentric contraction showed a significant increase in order of 0˚, 90˚, 45˚hip angle in males, whereas in order of 90˚ 0˚ 45˚hip angle in females. 5. All the values except total work tested in eccentric contraction were greater than those in concentric contraction.

Electrical conductivity change of PEDOT thin film according to Dopant and retardant effect

이재학,유성훈,김성희,강보은,최명수,이준영 한국고분자학회 2011 한국고분자학회 학술대회 연구논문 초록집 Vol.2011 No.1

힘-변위 모델을 이용한 펄스 GMAW의 해석

이재학,유중돈,Lee, Jae-Hak,Yoo, Choong-Don 대한용접접합학회 2009 대한용접·접합학회지 Vol.27 No.1

In order to determine the One-Drop One-Pulse(ODOP) condition of the pulsed gas metal arc(GMA) welding, the drop detaching phenomenon during the peak time is investigated using the force-displacement model. The drop detaching criterion is established based on the displacement of the pendant drop, and the forces exerted on the drop are calculated using the Modified Force Balance Model(MFBM). The effects of wire melting on the drop size and force are included in the force-displacement model. While the peak current has most significant effects on the drop detaching time, the initial drop mass prior to the peak time also influences drop transfer. The calculated results show good agreements with the experimental data, which implies that the ODOP condition can be predicted using the force-displacement method.

출혈성 Dieulafoy 병변의 내시경 치료에서 체위변화의 유용성

이재학,이석호,배원엽,박정훈,박도현,정일권,박상흠,김선주 대한소화기내시경학회 2006 Clinical Endoscopy Vol.32 No.3

Background/Aims: Dieulafoy's lesion is a rare cause of massive upper gastrointestinal bleeding, most commonly in the proximal stomach. Although the mechanical hemostatic method has been widely used, it is difficult to access for complete application. This study evaluated the utility of a positional change in patients with a bleeding Dieulafoy's lesion. Methods: Between January 2003 and March 2004, 15 patients with a bleeding Dieulafoy's lesion were randomly assigned to either a positional change group (right decubitus or supine, n=7) or a left decubitus group (n=8). The demographic characteristics, endoscopic variables, and clinical outcomes were analyzed. Results: The patients' characteristics at entry were similar in both groups. Initial hemostasis was achieved in all patients. Recurrent bleeding developed in only one patients in the left decubitus group. The mean procedure time was significantly shorter in the positional change group than in the left decubitus group (4.5 3.4 min vs. 7.4 5.2 min, p<0.05). The ineffective hemoclip number (respectively, 0.3 0.1 vs. 1.4 1.2, p<0.05) was significantly different in the two groups. No major procedure-related complications occurred in the positional change group. Conclusions: Endoscopic hemostasis with a positional change is an effective and safe method for treating in a bleeding Dieulafoy's lesion. (Korean J Gastrointest Endosc 2006;32:168-172) 목적: Dieulafoy 병변은 단시간에 생명을 위협하는 상부위장관 급성출혈의 한 원인으로 현재까지 치료는 내시경적 hemoclip이나 밴드결찰술을 널리 시행하고 있다. 그러나 주로 위식도 접합부위 6~8 cm 근위부에 있고 소만 측을 따라 분포하기 때문에 내시경적으로 접근하기가 쉽지 않다. 본 연구는 출혈성 Dieulafoy 병변의 내시경 치료 시 체위의 변화가 시술에 미치는 영향 및 유용성에 관하여 알아보았다. 대상 및 방법: 2003년 1월부터 2004년 3월까지 응급내시경 후, Dieulafoy 병변으로 진단한 환자들을 무작위로 두 군으로 분류하여 지혈술 시 좌측와위로 치료한 8명, 우측와위 및 앙와위로 자세변환 후 치료한 7명을 대상으로 전향적 연구를 하였다. 결과: 환자의 임상적 및 내시경 소견은 두 군 간에 의미 있는 차이가 없었다. 일차 지혈은 15명 모두에서 성공하였으며, 재출혈은 좌측와위군에서 1명 있었다. 시술의 평균 소요시간은 우측와위 및 앙와위의 체위변화군이 좌측와위군에 비해 의미 있게 짧았으며(4.5±3.4 min vs. 7.4±5.2 min, p<0.05), 사용한 비효율적 hemoclip 수는 체위변화군이 좌측와위군보다 유의하게 적었다(0.3±0.1개 vs. 1.4±1.2개, p<0.05). 내시경 지혈술 시 체위변화와 관련된 합병증은 없었다. 결론: 출혈성 Dieulafoy 병변의 내시경 치료 시 체위변화는 시술의 소요시간과 불필요한 hemoclip의 사용을 줄일 수 있는 효과적이며 안전한 보조 방법이라 생각한다.

TBC: A Clustering Algorithm Based on Prokaryotic Taxonomy

이재학,이하나,전윤성,원성호,천종식 한국미생물학회 2012 The journal of microbiology Vol.50 No.2

High-throughput DNA sequencing technologies have revolutionized the study of microbial ecology. Massive sequencing of PCR amplicons of the 16S rRNA gene has been widely used to understand the microbial community structure of a variety of environmental samples. The resulting sequencing reads are clustered into operational taxonomic units that are then used to calculate various statistical indices that represent the degree of species diversity in a given sample. Several algorithms have been developed to perform this task, but they tend to produce different outcomes. Herein, we propose a novel sequence clustering algorithm,namely Taxonomy-Based Clustering (TBC). This algorithm incorporates the basic concept of prokaryotic taxonomy in which only comparisons to the type strain are made and used to form species while omitting full-scale multiple sequence alignment. The clustering quality of the proposed method was compared with those of MOTHUR, BLASTClust, ESPRITTree,CD-HIT, and UCLUST. A comprehensive comparison using three different experimental datasets produced by pyrosequencing demonstrated that the clustering obtained using TBC is comparable to those obtained using MOTHUR and ESPRIT-Tree and is computationally efficient. The program was written in JAVA and is available from http://sw. ezbiocloud.net/tbc.

대학 수영선수들의 체격요인, 하지 등속성 근기능과 돌핀 킥 속도간의 상관관계

이재학 한국체육학회 2024 한국체육학회지 Vol.63 No.4

돌핀 킥 속도 향상을 위한 연구는 시뮬레이션 및 근전도 분석으로 주류를 이루고 있지만, 체격 요인, 최대 근력 토크를 빠르게 생성하는 능력과 각도에 대한 연구들이 부족한 실정이다. 따라서 체격 요인과 등속성 기능이 돌핀 킥 속도와의 상관성을 제시하기 위해서, 서울 소재 K 대학에 재학중인 남자 수영선수 21명 대상으로 선정하였다. 연구를 위하여 체격 요인(신장, 체중, 하지장 길이) 하지(발목, 무릎, 고관절)의 등속성 기능(최대근력 발현시간, 발현각도) 측정하였고, 돌핀 킥 속도는 수중 카메라로 측정하였다. 이 연구결과에 대한 통계 방법은 피어슨 상관계수를 이용하여 실시하였다. 이때 모든 통계적유의 수준은 power 값은 .8설정 하고 α =.05로 설정하였다. 연구 결과는 발목 저측굴곡 최대근력 발현시간(60°/s;r=0.619, p<0.05), 무릎 신전 최대근력 발현각도(60°/s;r=0.488,p<0.05), 고관절 신전 최대근력 발현시간(180°/s;r=-0.435,p<0.05) 상관성이 나타났다. 이러한 결과를 바탕으로 현장에서 돌핀 킥 속도를 높이려는 지상 훈련 프로그램을 적용한다면 경기력 향상을 위한 정보를 제공할 것이다. Research on improving dolphin kick speed is mainly conducted through simulation and electromyography analysis, but there is a lack of research on physique factors, Isokinetic dynamometry assessment. Therefore, in order to suggest a correlation between physique factors and time to peak torque and joint angle with dolphin kick speed, 21 male swimmers attending K University in Seoul were selected. For the study, physique factors(height, weight, lower extremity length) and Isokinetic dynamometry assessment(time to peak torque and joint angle) of the lower extremity(ankle, knee, hip joint) were measured, and dolphin kick speed was measured using an underwater camera. The statistical method for the results of this study was conducted using Pearson’s Correlation Coefficient. At this time, the power value was set to .8 and α = .05 for all statistical significance levels. The ankle plantar flexion time to peak torque(60°/s;r=0.619,p<0.05). knee extension joint angle(60°/s;r=0.488,p<0.05) and hip extension time to peak torque(180°/s;r=-0.435,p<0.05). Based on these results, applying dry-landing training to increase dolphin kick speed in the field will provide information for improving performance.

National Foreign Language Education Policies and CEFR: English as L2 and the Situation of Other Foreign Languages in Korea

이재학 고려대학교 스페인 라틴아메리카 연구소 2013 스페인라틴아메리카연구 Vol.6 No.2

The Common European Framework of Reference for Languages(CEFR) is the product of the political will for the emerging supranational organization and it's intended to provide “a common basis for the elaboration of language syllabuses, curriculum guidelines, examinations, textbooks, etc. across Europe” (Council of Europe, 2001). Although the CEFR has been welcomed by many foreign language educators in Europe, there has been criticism against its influence such as Fulcher's. As we know, the CEFR is not language specific and it requires a comparable level of proficiency from language to language. However, the status of English as an international lingua franca is very strong in Korea and it's the only foreign language(FL or L2) in Korea. In fact the Korea Institute for Curriculum and Evaluation named all other foreign languages such as French, German, Russian, Spanish, Chinese, Japanese, etc. as second foreign languages while it named English as foreign language. The widely spread concept that English speakers can communicate with the rest of the world is still dominant in Korea and the so called second foreign language education in high school level has been almost disappeared in last ten years. While the foreign language education policy makers in Korea ignore the value of the foreign languages other than English, the European language educators tend to value the achievement of the CEFR. Thus this study will analyze the Korean National Curriculum of English and other European Languages and will discuss the effectiveness of the CEFR in developing national language education policy in Korea.