만성요통환자와 정상인의 요부신전근의 등척성 근력 평가

임창훈,Lim, Chang-Hun 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.1

The purpose of this study were to measured peak torque of lumbar extensor at various degrees and to compare with the choronic low back pain patients and healthy subjects back extensor peak torque. Research subject are fifty choronic low back pain patients and fifty healthy subjects are Dong-a university hospital visited to 2000, January since 1999, august none lumbosacral traumal past history and neurologic disorder that is twenty generation, thirty generation, forty generation, fifty generation, sixty generation in healthy subjects and twenty generation, thirty generation, forty generation, fifty generation, sixty generation in cause choronic low back pain patients. The result were as follows. 1. There were each generation choronic low back pain patients and healthy subjects back extensor peak torque are consideration (p<.05). 2. Twenty generation was all degree of angle in lumbar extention peak torque in choronic low back pain patients back extensor are lower than healthy subjects(p<.05). 3. Thirty generation was all degree of angle in lumbar extention peak torque in choronic low back pain patients back extensor are lower than healthy subjects(p<.05). 4. Forty generation was all degree of angle in lumbar extention peak torque in choronic low back pain patients back extensor are lower than healthy subjects(p<;.05). 5. Fifty generation was all degree of angle in lumbar extention peak torque in choronic low back pain patients back extensor are lower than healthy subjects(p<.05). 6. Sixty generation was all degree of angle in lumbar extention peak torque in choronic low back pain patients back extensor are lower than healthy subjects(p<.05).

IP 주소 검색을 위한 가중 이진 프리픽스 트리

임창훈,임혜숙,이보미,Yim Changhoon,Lim Hyesook,Lee Bomi 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.11B

IP 주소 검색은 인터넷 라우터의 필수적인 기능의 하나로서, 라우터 전체의 성능을 결정하는 중요한 요소이다. 소프트웨어에 기반한 IP 주소 검색 방식의 성능 평가 기준 중 가장 중요한 것은 라우터의 처리 속도를 보장해 주는 의미를 갖는 최대 메모리 접근 횟수이다. 이진 프리픽스 트리 방식(BPT)은 최대 메모리 접근 횟수에 있어서 기존의 다른 소프트웨어에 기반한 방식 중 우수한 방식이지만, 트리의 구조가 불균형적이 되는 단점이 있다. 본 논문에서는 기존의 BPT 방식의 트리 생성 과정에 가중치 개념을 추가하여, 완전 균형 트리에 매우 근접하는 트리를 생성하는 가중 이진 프리픽스 트리 (WBPT) 방식을 제안한다. 제안하는 WBPT 방식은 기존의 소프트웨어에 근거한 방식들에 비교하여 최대 메모리 접근 횟수에 있어서 가장 적은 성능을 보인다. 또한 3만 개 정도의 프리픽스에 대해서 L2 캐쉬에 저장이 가능한 정도의 작은 메모리 크기를 요구하구 프리픽스의 추가, 삭제가 용이하므로 실제적인 라우터의 IP 검색을 위하여 사용될 수 있는 방식이다. IP address lookup is one of the essential functions on internet routers, and it determines overall router performance. The most important evaluation factor for software-based IP address lookup is the number of the worst case memory accesses. Binary prefix tree (BPT) scheme gives small number of worst case memory accesses among previous software-based schemes. However the tree structure of BPT is normally unbalanced. In this paper, we propose weighted binary prefix tree (WBP) scheme which generates nearly balanced tree, through combining the concept of weight to the BPT generation process. The proposed WBPT gives very small number of worst case memory accesses compared to the previous software-based schemes. Moreover the WBPT requires comparably small size of memory which can be fit within L2 cache for about 30,000 prefixes, and it is rather simple for prefix addition and deletion. Hence the proposed WBPT can be used for software-based If address lookup in practical routers.

Update on the Management of Thyroid Disease during Pregnancy

임창훈 대한내분비학회 2016 Endocrinology and metabolism Vol.31 No.3

Thyroid dysfunction during pregnancy can result in serious complications for both the mother and infant; however, these complicationscan be prevented by optimal treatment of maternal overt thyroid dysfunction. Although several studies have demonstratedthat maternal subclinical hypothyroidism is associated with obstetric complications and neurocognitive impairments in offspring,there is limited evidence that levothyroxine treatment can improve these complications. Therefore, most professional societies donot recommend universal screening for thyroid dysfunction during pregnancy, and instead recommend a case-finding approach inwhich only high-risk women are tested. However, recent studies have estimated that targeted thyroid function testing misses approximately30% to 55% of hypothyroidism cases in pregnant women, and some associations and researchers have recommendeduniversal screening of pregnant women to facilitate the early detection and treatment of overt hypothyroidism. This review summarizesrecent data on thyroid function test changes, thyroid functional disorder management, and thyroid screening during pregnancy.

The Comparison of the Ability of Balance Performance between Abnormal Persons with Blindness or Deafness and Normal Persons

임창훈,Lim, Chang-Hun The Korean Society of Physical Therapy 2007 대한물리치료학회지 Vol.19 No.6

Purpose: This study examined whether or not the balance performing ability of the disabled (blindness and deafness) is lower than normal people. Chronometry was used to compare the balance maintaining ability of blind and deaf subjects with that of normal subjects under the same conditions. Methods: In this study, balance foam, eye bandage, earplugs and headphones were used. The balance foam used in this study is smooth with slight elasticity and a convex upper side, 60cm wide, 15cm long and 9cm high. The eye bandage was used to artificially block the sight of the normal subjects, and the earplugs and headphones to block their hearing. Results: The mean time of the normal subjects standing with their eyes open, blindfolded and wearing ear plugs was 26.7, 19.8 and 28.7sec, respectively. The mean standing maintaining time for the blind and deaf subjects was 12.5 sec and 24.1 sec, respectively. The t-test result of the calculated mean time showed no significant difference (p>0.05) between the normal subjects and the normal subjects with their hearing blocked but there was a significant difference between the normal subjects with their hearing blocked and the deaf subjects (p>0.05). Conclusion: There was significance between the normal subjects and the normal subjects with their eyes blocked but there was no significant difference between the normal subjects with their eyes blocked and the blind subjects. Furthermore, there was a significant difference between the deaf and the normal subjects, which corresponds to the report showing that sight has a significant influence on balance.

목 기능장애 설문지의 절충 문화 적응

임창훈,이혜정,배성수,김진상,Lim Chang-hun,Lee Hae-jung,Bae Sung-soo,Kim Jin-sang 대한물리치료학회 2005 대한물리치료학회지 Vol.17 No.2

With the increase in the number of multinational and multicultural research projects, the need to adapt health status measures for use in other than source language has also grown rapidly. Most questionnaire were developed in English-speaking countries, but even within these countries, researchers must consider immigrant populations in studies of health, especially when their exclusion could lead to a systematic bias in studies of health care utilization or quality of life. The purpose of this study was to translate and and culturally adapt the three most used neck and spinal pain disability questionnaires - the Neck Disability Index(NDI), Neck pain and Disability Scale(NPDS), and Functional Rating Index(FRI) - into the korean language and evaluated their reliability, in addition to item response pattern, to achieve a good cross cultural adaptation. Each translated questionnaire was found to have high reliability (FRI ICC (2,1)=0.86 ($95\%$ CI: 0.75-0.92); NPDS ICC (2,1)=0.90 ($95\%$ CI: 0.83-0.95 ; NDI ICC (2,1) =0.90 ($95\%$ CI: 0.81-0.94)). The reliability of the translated versions of FRI, NPDS and NDI were excellent.

H.264의 인트라 프레임을 위한 하이브리드 에러 은닉 알고리즘

임창훈,김원정,임혜숙 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.8

장의회전이상 1예

임창훈,함기백,방수관,백승운,김은주 大韓消化器病學會 1992 大韓消化器病學會誌 Vol.24 No.1

마이크로키메리즘과 자가면역갑상선질환

임창훈 대한내분비학회 2010 Endocrinology and metabolism Vol.25 No.2

DCT 영역에서의 POCS에 근거한 디지털 영상 후처리

임창훈 건국대학교 산업기술연구원 2005 건국기술연구논문지 Vol.30 No.-

Even though post-processing methods based on projections onto convex sets (POCS) have shown good performance for blocking artifact reduction, it is infeasible to implement POCS for real-time practical applications. This paper proposes DCT domain post-processing method based on POCS. The proposed method shows very similar performance compared to the conventional POCS method, while it reduces tremendously the computational complexity. DCT domain POCS performs the lowpass filtering in the DCT domain, and it removes the inverse DCT and forward DCT modules. Through the investigation of lowpass filtering in the iterative POCS method, we define kth order lowpass filtering which is equivalent to the lowpass filtering in the kth iteration, and the corresponding kth order DCT domain POCS. Simulation results show that the kth order DCT domain POCS without iteration gives very similar performance compared to the conventional POCS with k iterations, while it requires much less computations. Hence the proposed DCT domain POCS method can be used efficiently in the practical post-processing applications with real-time constraints.

포스터 전시 발표 순서 : 소화기 ; 요로상피암의 전이로 인한 십이지장 폐쇄를 스텐트 삽입술로 치료한 1례 (초)

임창훈,김창환,양홍준,박민경,김태호,한석원 대한내과학회 2008 대한내과학회지 Vol.75 No.1S