닭고기 수출 활성화를 위한 무슬림 시장 진출 방안

이정훈,김하정,김나경,박정민,김진만,Lee, Jung-Hoon,Kim, Ha-Jung,Kim, Na-Kyeong,Park, Jung-Min,Kim, Jin-Man 한국축산식품학회 2014 축산식품과학과 산업 Vol.3 No.1

중환자실 간호사의 이직의도 예측요인

이정훈Lee, Jung Hoon),송영숙(Song, Yeoungsuk) 병원간호사회 2018 임상간호연구 Vol.24 No.3

Purpose: The purpose of this study was to understand morality identity, occupational stress and authentic leadership and identify factors contributing to turnover intention among intensive care unit (ICU) nurses. Methods: Data were collected from 230 nurses at the university hospitals in Daegu, Ulsan and Busan between February 15 and March 23, 2017. Instruments measuring turnover intention, moral identity, occupational stress, and authentic leadership were utilized. Statistical analysis included t-test, ANOVA, Pearson correlational analysis, and hierarchical regression analysis. Results: A total of 207 nurses in ICU participated in this study. The power of explanation with age and dependents on turnover intention was 4.1%. With inclusion of occupational stress, moral identity, and authentic leadership factors put into the model, further 20.4% was explained. The explanatory power of the turnover intention in the final model was 23.6% (F=11.63 p<.001), and occupational stress was the key factor explaining turnover intention (β=.28, p<.001). Predictive factors contributing to turnover intention were age, occupational stress, moral identity, and authentic leadership in final model. Conclusion: These findings demonstrated occupational stress, moral identity and authentic leadership as critical factors contributing turnover intention of ICU nurses. It is necessary to promote nursing manager’s authentic leadership, and to encourage moral identity in ICU nurses. In addition, providing intervention programs to reduce occupational stress for ICU nurses is necessary.

홀로그래픽 고분자 분산 액정을 이용한 홀로그램 이중 초점 렌즈 제작

이정훈,성기영,이상조,김기현,조영걸,곽종훈,송재봉,이윤우,Lee, Jung-Hoon,Sung, Gee-Young,Lee, Sang-Jo,Kim, Ki-Hyun,Joh, Young-Gul,Kwak, Chong-Hoon,Song, Jae-Bong,Lee, Yun-Woo 한국광학회 2003 한국광학회지 Vol.14 No.2

다기능성 아크릴레이트 단량체와 네마틱 액정 등을 혼합한 홀로그래픽 고분자 분산 액정 박막을 제작하고 액정의 농도와 피부에서 인가한 교류 전기장 등에 대한 실시간 회절효율을 측정하였다. WPDLC 박막에 기록된 홀로그램은 적절한 교류 전기장의 on/off에 의해 가역적으로 소거와 재생이 가능함을 보였다. 이러한 전기광학 특성을 이용하여 30 cm와 40 cm의 이중초점을 갖는 홀로그램 렌즈를 제작하였다. We Have fabricated a holographic polymer-dispersed liquid crystal (HPDLC) thin film, which is composed of multifunctional acrylate monomer blended with the nematic liquid crystal mixture, and then investigated the real-time diffraction efficiencies for various amounts of liquid crystals and applied AC electric fields. It is experimentally shown that the holographic gratings recorded in the HPDLC film can be reversibly erased and reconstructed by switching on and off an appropriate applied AC electric field. By use of these electro-optic properties we have developed bifocal holographic lenses having two different focal lengths of 30cm and 40 cm.

Tilt-rotor 항공기 동력계통 중량 추정에 대한 상쇄연구

이정훈,Lee, Jung-hoon 항공우주시스템공학회 2014 항공우주시스템공학회지 Vol.8 No.4

This paper presents the trade-off study of conducting a survey of the weights for various kind of propulsion systems installed in the Smart Unmanned Aerial Vehicle TR-100, a tilt-rotor vehicle, which is developed by Korea Aerospace Research Institute, in order to predict the appropriate propulsion system for present and future Personal Air Vehicle, which has single mode and vertical take-off & landing. In order to perform the trade-off study, we set the requirements that the vehicle hovers for 1 hour with 1,000 kg maximum take off weights. In this study, the power systems are classified engine, which uses the fossil fuel - turboshaft engine, piston engine, diesel engine and rotary engine, and electric motor with fuelcell or Li-Ion battery. The results of trade-off study shows the power systems using fossil fuel are superior to using fuelcell or Li-Ion battery for weight of propulsion system. Also turboshaft engine is the best power system for the aspects of system weight, and the nexts are rotary engine, piston engine, diesel engine, electric motor with Li-Ion battery, and electric motor with fuelcell.

테이핑이 편마비 환자의 결관절 아탈구에 미치는 효과

이정훈,이건철,김용권,Lee, Jung-Hoon,Lee, Geon-Cheol,Kim, Yong-Kwon 대한물리치료과학회 2002 대한물리치료과학회지 Vol.9 No.3

The purpose of this case study was to evaluate the taping therapy program designed to improve shoulder joint subluxation in hemiplegic patients. This study was 9 males who had hemiparesis with limitation of range of motion (ROM) and subluxation on affected side. Patients received proprioreptive facilitation using shoulder weight shifting and additional A type and B type taping. As a result of this study, Patients showed reduction of the subluxation on hemiplegic shoulder joint. but it was difficult to generalize. We concluded that proprioceptive facilitation using shoulder weight shifting and taping therapy was effective in reducing severe shoulder subluxation. Following studies must be evaluated its statistical significance.

항공기용 연료승압펌프 설계

이정훈,김준태,Lee, Jung-hoon,Kim, Joon Tae 항공우주시스템공학회 2012 항공우주시스템공학회지 Vol.6 No.4

The fuel boost pump for the aircraft was first indigenously developed in Korea. It is one of the core component for fuel subsystem and composed of motor assembly, impeller assembly, and body assembly with BLDC motor. It shall provide some amount of fuel to engine system continuously for any flight condition considering sudden altitude change and any attitude. This paper describes the procedures and the results for the design, the integration, and the performance analysis of the fuel boost pump.

항공기 피치 조종력 비행시험

이정훈,Lee, Jung-hoon 항공우주시스템공학회 2014 항공우주시스템공학회지 Vol.8 No.3

This paper presents the procedures and the results of the pitch control force via flight test for a light airplane in order to make out the stability of the aircraft and the compliance with concerned regulation. The flight test procedures were determined in order to obtain the aircraft type certification. The instrumentation equipments including airspeed indicator, accelerometer, and pitch control force measurement tools are used to perform the flight test. For the flight test, the airspeed and the pitch control force with related normal acceleration are measured sustaining turn flight with bank angle derived from trim speed. The flight test results showed that the handling qualities of the airplane are complied with the KAS-23, the regulation of the Korean government for the light airplane type certification.

응급실을 내원한 구강악안면외과 안면골 골절 환자의 변화에 대한 비교 연구

이정훈,김용덕,신상훈,김욱규,김종렬,정인교,Lee, Jung-Hoon,Kim, Yong-Deok,Shin, Sang-Hun,Kim, Uk-Kyu,Kim, Jong-Ryoul,Chung, In-Kyo 대한악안면성형재건외과학회 2005 Maxillofacial Plastic Reconstructive Surgery Vol.27 No.2

Although there have been many clinical studies about the facial trauma in the recent as well as in the past, severity and frequency of facial trauma are reported multifarious. It seemed to be because of variety of social, cultural, and environmental factors, and the view point of investigators. In this study, we investigated about the patients visiting emergency room during recent 5 years(1999-2003), and compared with retrospective study during former 5 years(1992-1996) in Dept. OMS Pusan Univ-Hospital. We are assessed the cause, type, demographic ect. And analyzed alterations of facial bone fractures during past 2 periods. the results were as follows. The total number of patients was increased slightly. 429 patients treated for maxillofacial fractures between January 1992 and December 1996 and 466 patients treated between January 1992 and December 1996. The male-to-female ratio reduced in the second period by a factor of 0.7. Patients in the age groups of 10-19 years and 20-29 years increased by a factor of 4.2 and 7.9 in the second period. Assaults and falls in the second period decreased by a factor of 15.4 and 7.9. But, traffic accidents and slip downs in the second period increased by a factor of 6 and 6.6. The mandibular fractures(70.6%) showed the highest incidence, followed by zygomatic bone and arch fractures(7.5%), maxillary bone fractures(4.0%), and nasal bone fractures(4.0%). In the second period, the mid-face fracture was increased slightly. So, the mandibular fractures(69.0%) followed by maxillary bone fractures(12.9%), zygomatic bone and arch fractures(8.0%), nasal bone fractures(7.0%). Ramus fractures and body fractures of mandible was increased slightly in the second period.

헬리콥터 연료탱크 기본설계

이정훈,김성찬,김현기,Lee, Jung-hoon,Kim, Sung-chan,Kim, Hyun-gi 항공우주시스템공학회 2008 항공우주시스템공학회지 Vol.2 No.2

This paper presents the procedure and the results of the preliminary design of the fuel tank as a part of developing the helicopter. For the requirements of operational capability, MIL-DTL-27422D and Defence Standard 15-2/Issue 1 are considered to be applied in developing a helicopter fuel tank. The procedure of the fuel tank development is set up including interface plate design, tank design, former design, tank material lay-up, and tank installation assessment. The outer moulded line and fittings of fuel tank have being designed, and several test will be performed to get the qualification.

A New Integral Variable Structure Regulation Controller for Robot Manipulators with Accurately Predetermined Output Performance

이정훈,Lee, Jung-Hoon Institute of Korean Electrical and Electronics Eng 2004 전기전자학회논문지 Vol.8 No.1

본 연구에서는 고도의 비선형 로봇 매니플레이터를 위한 새로운 적분 가변 구조 제어기를 설계하였다. 특수 적분 슬라이딩 면과 외란 관찰기를 이용한 사전 성능을 갖는 개선된 레귤레이션 제어이다. 어떠한 리칭 구간도 없이 주어진 초기조건부터 원점까지 슬라이딩 궤적을 정확히 사전 결정하기 위하여 특수한 초기 조건을 갖는 적분 변수를 갖는 슬라이딩 면이 채택되었다. 그리고 외란 관찰기를 사용한 연속 입력은 큰 계산 부하 없이 사전 추적오차 범위내의 사전에 결정된 슬라이딩 궤적을 추적하게 한다. 사전에 결정된 슬라이딩 궤적을 사전에 결정된 추적 오차의 성능은 슬라이딩 면의 값과 슬라이f딩 출력의 오차와 관계와 페루프 안정성과 함께 두 개의 정리를 통하여 명확히 검진되었다. 제안된 레귤레이션 제어기의 설계는 성능 설계와 강인성 설계로 각 독립 링크 상에 분리된다. 제안된 알고리즘의 유용성은 매개변수 불확실성과 페이로드 변동하의 이 축 로봇의 레귤레이션 제어에 대한 시뮬레이션 연구를 통하여 무 리칭 구간, 무 오버슈트, 사전 추적 오차를 갖는 사전 결정 출력, 용이한 출력 가변성, 설계 단계의 분리 등의 관점에서 입증되었다. In this paper, a new integral variable structure regulation controller(IVSRC) is designed by using a special integral sliding surface and a disturbance observer for the improved regulation control of highly nonlinear robot manipulators with prescribed output performance. The sliding surface having the integral state with a special initial condition is employed in this paper to exactly predetermine the ideal sliding trajectory from a given initial condition to origin without any reaching phase. And a continuous sliding mode input using the disturbance observer is also introduced in oder to effectively follow the predetermined sliding trajectory within the prescribed accuracy without large computation burden. The performance of the prescribed tracking accuracy to the predetermined sliding trajectory is clearly investigated in detail through the two theorems together with the closed loop stability. The design of the proposed IVSRC is separated into the performance design and robustness design in each independent link. The usefulness of the algorithm has been demonstrated through simulation studies on the regulation control of a two link manipulator under parameter uncertainties and payload variations, in view of no reaching phase, no overshoot, predetermined response with prescribed accuracy, easy change of output performance, separation of design phase, and so on.