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박혜령(Hye-Ryoung Park),허환(Hwan Huh),권민호(Min-Ho Kwon),이종필(Jong-Pil Lee) 전력전자학회 2023 전력전자학회 논문지 Vol.28 No.3
Several basic components of the fuel cell system for ships include a fuel cell stack, a power conversion system, a battery, and a control device. Polymer electrolyte membrane fuel cell(PEMFC) is considered the most important component in this system as it has a variety of advantages such as high-power density, fast response speed, and low operating temperature. However, a stable, high-efficiency boost converter must be manufactured to utilize it as a power source for ships due to several drawbacks like low voltage and a wide range of fluctuation and high currents. This paper aims to study the design and implementation of a high-current power conversion system utilizing an insulated resonance converter for the fuel cell system for ships. The proposed power converter in this study consists of a two-stage conversion structure, which incorporates a two-phase interleaved boost converter and a series resonance converter(SRC). The performance of the structure is verified by testing a 30 kW class unit module manufactured.
박혜령(Hye-Ryoung PARK),김성곤(Seong-Gon KIM) 동아시아경상학회 2022 The East Asian Journal of Business Economics Vol.10 No.1
Purpose - Burnouts cause the workers to quit their jobs because with the heavy workloads that the employees get subjected to, they feel that they have little control over what they have to accomplish in the workplace. The purpose of this research is to provide adequate solutions using brief consultation process, reducing negative psychological factors. Research design, Data, and methodology - The current research conducted the ‘Qualitative Content Analysis’ (QCA), which is one of the most employed analytical tools; it has been used widely all over the globe in various research applications in library science and information. Primarily, this analysis is often used as a method in the quantitative tool until the recent decade. Result - Based on ultimate systematic literature analysis, excessive workloads can get addressed by finding proper solutions to the issues of depression, anxiety, irritability, and discouragement. The solutions are (1) Combating Excessive Workloads using Effective Employee Selection, (2) Employee Effective training, and (3) Job redesigning. Conclusion - Selecting or recruiting employees that have skills for the given job also makes it possible for the organization to run its employees effectively and with minimal cases of workload as an organization understands the capabilities and capacities of workload an employee can complete.
고유수용성신경근 촉진법 훈련과 동작관찰 훈련이 뇌졸중 환자의 상지 운동기능에 미치는 효과: 단일사례 연구
박혜령 ( Hye Ryoung Park ),이문규 ( Moon Kyu Lee ),윤태원 ( Tae Won Yun ) 한국전문물리치료학회 2015 한국전문물리치료학회지 Vol.22 No.1
This study evaluated and compared the effectiveness on upper motor extremity function between proprioceptive neuromuscular facilitation which has been frequently used in clinical practice, and action observation training in terms of improving upper motor extremity function. A study with a single-subject design (A-B-C-A’) was conducted with a patient who was diagnosed with left hemiplegia. A repeated-measure analysis was conducted to assess results of the Wolf Motor Function Test (WMFT), Box and Block Test (BBT), and grip and pinch strength test performed daily in the study for 4 weeks. The results of the analysis indicated that the WMFT score, BBT score, grip strength, and pinch strength were improved from 29.60 to 39 (24.10%), from 1.67 to 4.93 each (EA) (66.22%), from 2.06 to 2.66 libras (lbs) (22.61%), and from 1.57 to 1.93 lbs (18.94%), respectively, from the baseline period to treatment period B. The values were improved from 29.60 to 42.20 (29.86%), from 1.67 to 7 EA (76.21%), from 2.06 to 3.47 lbs (40.57%), and from 1.57 to 1.67 lbs (6.12%), respectively, from the baseline period to treatment period C. From treatment period B to treatment period C, the WMFT score, BBT score, and grip strength were improved from 39 to 42.20 (7.58%), from 4.93 to 7 EA (29.56%), and from 2.66 to 3.47 lbs (23.20%), respectively, but pinch strength was decreased from 1.93 to 1.67 lbs (15.83%). In conclusion, proprioceptive neuromuscular facilitation and action observation training both have positive effects on upper extremity motor function. However, we suggest that the posttreatment effect of action observation training was better than that of proprioceptive neuromuscular facilitation.
고유수용성 감각 증진 운동이 뇌졸중 환자의 균형 능력에 미치는 영향
송현승,박혜령,배시절,박지성,조형태,장하희,김수진,Song, Hyun-Seung,Park, Hye-Ryoung,Bae, Si-Jeol,Park, Ji-Seong,Cho, Hyeung-Tae,Jang, Ha-Hee,Kim, Su-Jin 대한고유수용성신경근촉진법학회 2010 PNF and Movement Vol.8 No.2
Purpose : The purpose of this study was to investigate the effects of proprioceptive exercise (PE) using a trampoline and a balance board on a balance ability after stroke. Method : Sixteen chronic stroke patients participated. Participants were randomly assigned to the PE group or control group (8 experimental, 8 control). All of participants were in-patients at local rehabilitation centre and had been receiving a traditional rehabilitation program, five days a week. The PE group have additionally undergone for four weeks, three days a week, the PE using a trampoline and a balance board under supervision by a physical therapist but control group was not received any additional program except the traditional rehabilitation program. The position sense test used to assess a proprioceptive sense at a knee joint. The Berg Balance Scale (BBS) and the Timed Up & Go (TUG) test to measure the balance ability were carried out before and after the training. Result : After the training the error of position sense at knee joint of PE group significantly decreased compared to the control group. The PE group demonstrated a significant improvement in the scores of the BBS and TUG. Conclusion : The present study suggests that the PE program using a trampoline and balance board may become a useful tool for enhancing a balance ability in chronic stroke patients through the ennced proprioceptive position senses.
노인 생활 만족도 및 자아존중감과 우울감에 대한 집단 음악 프로그램 효과성 비교 연구
최말옥(Mal Ok Choi),박혜령(Hye Ryoung Park) 한국노인복지학회 2005 노인복지연구 Vol.0 No.27
본 연구는 집단음악프로그램이 시설노인과 재가노인의 생활만족도와 자아존중감의 향상, 우울감의 감소에 대하여 어느 정도 영향을 미치는지, 시설노인과 재가노인 간의 효과성에 어떠한 차이가 있는지를 살펴보기 위하여 집단음악프로그램을 실시한 후 그 결과를 분석한 것이다. 연구의 대상자는 마산시의 사회복지관 부설 탁로소에서 생활하고 있는 노인 13명과 창원시에 소재한 S양로시설의 12명이었다. 본 연구에서는 이들을 대상으로 200t년 2월 16일부터 동년 3월 31일까지 6주간 12회로 집단음악 프로그램을 진행하여 수집한 데이터를 활용하였다. 연구목적을 위해 세 가지의 가설을 설정하였다. 즉 첫째, 집단음악프로그램에 참여한 시설노인과 재가노인의 생활만족도는 프로그램에 참여하기 전보다 참여한 후 차이가 날 것이다. 둘째, 집단음악프로그램에 참여한 시설노인과 재가노인의 자아존중감 정도는 프로그램에 참여하기 전보다 참여한 후 차이가 날 것이다. 셋째, 집단음악프로그램에 참여한 시설노인과 재가노인의 우울 정도는 프로그램에 참여하기 전보다 참여한 후 차이가 날 것이다. 분석 결과, 집단음악프로그램이 시설노인과 재가노인 모두에게 긍정적 효과를 가져왔으나 재가노인보다는 시설노인의 생활만족도, 자아존중감, 우울감 감소에 더욱 영향을 미치는 것으로 나타났다(시설노인의 경우 생활만족도 U=22.500, 유의확률 p=0.003(p<0.01), 자아존중감 U=0.000, 유의확률 p=0.000(p<0.001), 우울감 감소 U=2.500, 유의확률 p=0000<0.001) ). 이러한 분석 결과에서 알 수 있는 것은 일반적으로 집단음악프로그램이 재가노인 보다는 시설노인에 대하여 생활만족도와 자아존중감을 증가시키고, 우울감은 감소시켜 준다는 것으로 나타나고 있어서 시설노인에게 보다 유익한 프로그램임을 확인할 수 있다는 것이다. This study analyzed the result after did group music program for the effectiveness of difference the aged in welfare institution and in Family, and How about the group music program have effect on promoting life satisfaction and self-esteem, while demoting the mental depression of the aged in welfare institution and in Family. The sample of this study was taken from day-care center of social-welfare center located in Masan, 13 aged people, and welfare institution located in Changwon, 12 aged people. The programs were held in 12 separate performance. The results were as follows; 1. the life satisfaction level of the aged in welfare institution was improved after the group music program(pre- 33.25, post- 40.08/ +6.83, U=22.500, p=0.003(p<0.01)). 2. the self-esteem level of the aged in welfare was improved as well, after the group music program(pre-24.33, post-32.12/ +7.83, U-0.000, p=0.000(p<0.001)). 3. the depression level of the aged in welfare diminished after the group music program(pre- 21.42, post- 14.17/ -7.25, U=2.500, p=0.000(p<0.001)). The result, the group music program improved for both the aged in welfare institution and the aged in family. But the group music program improved the life satisfaction level the self-esteem level the depression level of the aged in welfare institution more than the aged in family.
실험연구 : 상복강 대동맥 교차차단 및 재관류 시 Fenoldopam 투여가 허혈성 신 손상에 미치는 영향
유진균 ( Jin Gyun Yoo ),박혜령 ( Hye Ryoung Park ),이용철 ( Yong Cheol Lee ),김진모 ( Jin Mo Kim ),장영호 ( Young Ho Jang ),김애라 ( Ae Ra Kim ),배정인 ( Jung In Bae ),홍지희 ( Ji Hee Hong ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.2
Background: The overall rate of renal complication after surgery on the suprarenal aorta remains high. In this study, the changes in renal blood flow (RBF), urinary oxygen tension (PuO2), renal vascular resistance (RVR), and urinary volume following fenoldopam administration were investigated in supraceliac aortic cross-clamping and unclamping animal model. Methods: Twelve dogs were divided into two groups; control group (n = 6), fenodopam group (n = 6). After brachial, femoral, and pulmonary arterial catheterization, midline abdominal incision was made. For the aortic cross-clamping the supraceliac aorta was exposed. A doppler flowmeter probe was placed around right renal artery. A ureteral catheter was positioned at the right renal pelvis to measure urine volume and urinary oxygen tension (PuO2). In fenoldopam group, 0.5μg/kg/min of fenoldopam was administered immediately before suprarenal aortic reperfusion. Systemic hemodynamics, renal blood flow, renal vascular resistance, PuO2, and urine volume were compared between two groups. Results: The systemic hemodynamics were not significantly different between the two groups throughout the experiment. After aortic reperfusion, the RVR significantly increased in control group, but the RVR in fenoldopam group remained to baseline level. The urine output, RBF, and PuO2 significantly increased in fenoldopam group compared to control group. BUN and serum creatinine were not different between the two groups. Conclusions: High dose of fenoldopam administration reverse ischemic renal insufficiency after supraceliac aortic cross clamping. (Korean J Anesthesiol 2007; 52: 202~11)