Poorer dynamic postural stability in patients with anterior cruciate ligament rupture combined with lateral meniscus tear than in those with medial meniscus tear

이진혁,Dae-Hee Lee,Jong-Hoon Park,Dong Won Suh,Eunseon Kim,장기모 대한슬관절학회 2020 대한슬관절학회지 Vol.32 No.-

Background: Only limited data are available regarding postural stability between anterior cruciate ligament (ACL)-injured patients with medial meniscus (MM) tear and those with lateral meniscus (LM) tear. The purpose of this study was to compare preoperative postural stability for both involved and uninvolved knees in ACL rupture combined with MM and LM tears. It was hypothesized that there would be a significant difference in postural stability between these two groups. Methods: Ninety-three ACL-injured patients (53 combined with MM tears vs. 40 combined with LM tears) were included. Static and dynamic postural stability were evaluated with the overall stability index (OSI), anterior–posterior stability index (APSI), and medial–lateral stability index (MLSI) using stabilometry. Knee muscle strength was evaluated using an isokinetic testing device. Results: In the static postural stability test, none of the stability indices showed significant differences between the two groups for both knees (p > 0.05). In the dynamic postural stability test for involved side knees, the OSI and APSI were significantly higher in the LM tear group compared to the MM tear group (OSI: 2.0 ± 0.8 vs. 1.6 ± 0.5, p = 0.001; APSI: 1.5 ± 0.6 vs. 1.3 ± 0.5, p = 0.023), but not the MLSI (p > 0.05). In the static and dynamic postural stability tests in each group, there were no significant differences between the involved and uninvolved side knees (p > 0.05). There was no significant difference in the knee muscle strength between the two groups (p > 0.05). All postural stability showed no significant correlation with knee muscle strength (p > 0.05). Conclusion: Dynamic postural stability was poorer in patients with ACL rupture combined with LM tear than in those with MM tear. Therefore, close monitoring for postural stability would be necessary during preoperative and postoperative rehabilitation, especially for patients with ACL rupture combined with LM tear.

장애인의 금융서비스 이용 채널 유형화와 특성 탐색에 관한 연구

이진혁 한국장애인평생교육복지학회 2022 장애인평생교육복지연구 Vol.8 No.2

This study aims to derive the types of financial service use channels for the disabled and identify demographic, household, and disability characteristics according to the types. For this purpose, a sample of 7,025 persons with disabilities was used in the data of the 2020 Survey on the Status of Persons with Disabilities. The primary analysis method was Latent Class Analysis to categorize financial service channels. In addition, chi-square analysis and one-way ANOVA were performed to identify the characteristics of each types. As a result of the study, first, the types of financial service channels were classified into four types:‘exclusion of overall financial service channel(52.9%)', 'inclusion of overall financial service channel(10.5%)', 'inclusion of Internet/mobile banking(5.1%)', 'exclusion of Internet/mobile banking(31.5%)'. Second, the 'exclusion of overall financial service channel’ type had the highest proportions of over 65, women, unemployed, and people living alone, with the lowest education years and household income. In addition, the degree of disability was severe, and the proportion of people with sensory or mental disabilities were high. Third, the ‘exclusion of internet/mobile banking ’ type had the highest rate of living in the countryside and living alone. In particular, compared to the ‘inclusion of internet/mobile banking’ type, the proportion of over 65, women, unemployed was higher. In addition, education year and household income were lower. The degree of disability was less severe, but the proportion of people with sensory disabilities was relatively high. Based on the research results, it was suggested that intervention is urgently needed for the types excluded from the major financial channels and that an individualized approach is required for each type. 연구목적 : 본 연구는 장애인의 금융서비스 이용 채널 유형을 도출하고, 유형별 인구사회학적 특성, 가구 특성, 장애 특성을 파악하는 것을 목적으로 수행되었다. 연구방법 : 본 연구의 주된 연구방법은 금융서비스 이용 채널 유형화를 위해 잠재계층분석(LCA)을 진행하였으며, 유형별 특성을 파악하기 위해 카이제곱 분석과 일원 분산분석을 시행하였다. 이를 위해 2020년 장애인실태조사 자료에서 총 7,025명의 장애인 표본을 활용되었다. 연구결과 : 본 연구에서 나타난 결과는 다음과 같다. 첫째, 장애인의 금융서비스 이용 채널 유형은 ‘전반적 금융서비스 채널 배제(52.9%)’, ‘전반적 금융서비스 채널 이용 포용(10.5%)’, ‘인터넷·모바일 뱅킹 이용 포용(5.1%)’, ‘인터넷·모바일 뱅킹 배제(31.5%)’ 총 4개의 유형으로 구분되었다. 둘째, ‘전반적 금융서비스 채널 배제’유형은 65세 이상, 여성, 미취업자, 독거 가구인 비율이 높고, 교육연수와 가구소득이 가장 낮았다. 또한, 장애 정도가 심하고, 감각 장애 및 정신적 장애인의 비율이 높은 것으로 나타났다. 셋째, ‘인터넷·모바일 뱅킹 배제’ 유형은 시골에 거주하고 독거 중인 비율이 가장 높았다. 특히, ‘인터넷·모바일 뱅킹 이용 포용’ 유형과 비교해 65세 이상, 여성, 미취업자의 비율이 높고, 교육연수 및 가구소득이 낮았다. 장애 정도가 심한 장애인 비율은 오히려 낮았지만, 감각 장애인의 비율은 상대적으로 높았다. 제언 : 본 연구결과를 토대로 주요 금융 채널 이용에서 배제된 유형에 개입이 시급하며, 유형에 따른 개별화된 접근이 필요하다는 사실을 제언하였다.

Life-time Prediction of a Chloroprene Rubber (CR) O-Ring Using Intermittent Compression Stress Relaxation (CSR) and Time-Temperature Superposition (TTS) Principle

이진혁,조남주,배종우,김정수,황태준,박성두,박성한,여태민,김원호 한국고분자학회 2011 Macromolecular Research Vol.19 No.6

Intermittent compression stress relaxation (CSR) testing was used to examine the degradation of a large scale chloroprene rubber (CR) O-ring, rather than a reduced scale copy, as well as predict its life-time. An intermittent CSR jig was designed by considering the O-ring’s environment during use. The testing allowed the observation of the effects of friction, heat loss and stress relaxation by the Mullins effect. Degradation of O-rings by thermal aging was observed between 40 and 120 ℃. In the high temperature range of 80-120 ℃, the O-rings exhibited linear degradation behavior and satisfied the Arrhenius relationship. The activation energy was approximately 72.7 kJ/mol. From the Arrhenius plots, the predicted life-times were 22.8 years and 34.5 years for the 50% and 40% failure conditions,respectively. Using the time-temperature superposition (TTS) principle, full predictions of failure at 40 ℃could be made, saving considerable testing time. Between 40 and 80 ℃, the activation energy decreased to 58.9 kJ/mol. William-Landel-Ferry (WLF) plotting confirmed that the O-rings show non-linear degradation behavior under 80 ℃. The life-time of the O-rings predicted by the TTS principle was 11.1 years and 18.1 years for each failure condition. The life-time predicted by the TTS principle was more conservative than that from the Arrhenius relationship.

[건강기획] 찬바람 부니 간지러워요!

이진혁 넥스트미디어 2016 넥스트 이코노미 Vol.- No.150

(주)상일테크 고객관리 App 개발

이진혁,박태호,손진식,염정훈 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.춘계

Integrity Evaluation of Pipe Welding Zones using Wavelet Transforms, and Specific Sensitivities based on SH-EMAT Pulse-Echo Method

이진혁,김대현 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.15 No.10

Pipes in facilities contain lots of welding zones and requires automated ultrasonic inspection. An electromagnetic acoustic transducer(EMAT) can be usefully applied in an automated ultrasonic inspection system. In this study, shear horizontal waves (SH-waves)generated by EMAT were implemented for the inspection of pipe welding zones. In analyzing of SH-EMAT signals, wavelet transformswere useful to extract key information. The intensity of the directly transmitted signal was used as a reference signal. A ratio of thereflected signal to the reference was proposed as the specific sensitivity. The sizes of defects were evaluated quantitatively using thespecific sensitivity.

Individuals with recurrent ankle sprain demonstrate postural instability and neuromuscular control deficits in unaffected side

이진혁 대한스포츠물리치료학회 2018 대한스포츠물리치료학회 워크숍 Vol.2018 No.11

都市型 有料老人福祉施設의 動向과 建築計劃的 提案에 關한 硏究

이진혁,임창복 대한건축학회 2005 대한건축학회논문집 Vol.21 No.3

Housing is one of the most important issues in the consideration of social welfare for the elderly. The purpose of this study is to offer basic research data of planning and to cope with coming aged society through architectural design proposal of proper urban type user-charged residential facilities to live continuously where they are. As a result, 1. as selecting locations for residential facilities, elderly social welfare facilities need to be located in 10 minutes on foot or by vehicle so that elderly people can access easily and to keep close connection between facilities. 2. mixed-use development is needed, 3. the type of facility is would be sheltered housing, 4. small scale facility management in urban go to local govern institution or non profit private organization for stability. 5. building layout would rather be better in one building with vertical function separation, and atrium layout which is dominate in Europe and Japan and, offer strong community need to be taken into consideration. 6. the preference of room size by survey and research is 7-9(pyung) for single and 11-17(pyung) for couple, 7. a building of 50 dwelling units or so with 2-3 stories is ideal from a caregiving and management perspective in urban area.

엑시머레이저 치료를 경험했던 백반증 환자가 한방복합치료와 엑시머레이저 병행치료로 호전된 치험 4례

이진혁,김세윤,Lee, Jin-Hyuk,Kim, Se-Yoon 대한한방안이비인후피부과학회 2014 한방안이비인후피부과학회지 Vol.27 No.3

Purpose: This study aims to prove effects of an oriental medical complex therapy on vitiligo patients who have experienced the Eximer laser therapy. Method: The study conducted its investigation targeting these four patients who have not been observed with any satisfactory reaction to the Eximer laser therapy. The study analyzed the findings through the comparison on the pictures before and after the therapy. Result: After comparing the pictures, the study confirmed positive changes in the conditions of the patients. The oriental medical complex therapy turned out to be effective enough to treat the patients who have gone through the Eximer laser therapy before. Conclusion: Such result leads the study to a conclusion that the oriental medical complex therapy can be an effective way to treat these patients who do not have a satisfactory reaction to the Eximer laser therapy. In addition, the author of the study suggests that more clinical trials should be conducted.

Silicon Wafer 의 Hydrogen Plasma Dry Cleaning 시 수소 원자 재결합 반응

이진혁,김영채 ( Jean Hyouc Lee,Young Chai Kim ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.1