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      • KCI등재
      • KCI등재

        On Postoperative Day Balloon Angioplasty for Salvage of Newly-Placed, Flow-Limiting Native Arteriovenous Fistula

        박재영,유창현 대한혈관외과학회 2015 Vascular Specialist International Vol.31 No.1

        Purpose: To report result and usefulness of immediate postoperative balloon angioplasty of de novo arteriovenous fistula (AVF) with limited flow just after creation. Materials and Methods: From January 1, 2012 to March 31, 2014, 1,270 patients received native AVF creations in a single vascular clinic. In twenty-four patients (1.9% of total AVF creation), immediate postoperative balloon angioplasty was performed because of limited flow on palpation (only pulsation or no thrill) just after AVF creation. Medical records were reviewed retrospectively; technical success (restoration of AVF flow)/clinical success (growing as functional AVF) rate, maturation time, primary patency rate and fistula survival outcome were analyzed during a mean 10.8 months of follow-up. Results: Technical/clinical success rate was 95.8% (23/24 cases); AVF flow was restored after balloon angioplasty, and all the flow-restorated AVFs grew as functional AVFs with mean±standard deviation, 4.5±1.5 weeks of maturation time. In seven (30.4%) patients, a secondary balloon angioplasty was needed to enhance maturation. The overall primary patency after immediate postoperative balloon angioplasty was 69.6% at 1 and 6 months and 59.0% at 12 months. There was 1 complication (operation site hematoma). Conclusion: Immediate postoperative balloon angioplasty for salvage of newly-placed, flow-limiting native AVF is a useful, effective and safe procedure.

      • KCI등재

        DEVELOPMENT OF TORQUE VECTORING CONTROL ALGORITHM FOR FRONT WHEEL DRIVEN DUAL MOTOR SYSTEM AND EVALUATION OF VEHICLE DYNAMICS PERFORMANCE

        박재영,허승진,강대오 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.5

        This study developed a control algorithm of torque vectoring system to improve the handling performance of a green-car and evaluate the performance of vehicle dynamics to improve the controllability and stability. Firstly, this study configured the control algorithm with the supervisory controller that decides the control mode by checking the current driving status of a vehicle, target yawrate calculator that reflects the steady-state and transient-state response characteristics according to the control mode, as well as the reference yawrate calculation, desired yaw moment calculation and transferred torque calculation. The control mode consists of the agile mode that controls the torque vectoring to improve the controllability and the safe mode that controls the torque vectoring to improve stability. Secondly, this study performed the modeling of the dual motor type torque vectoring system and an EV AWD vehicle. Lastly, this study defined the driving test scenario and evaluation method as well as the quantitative performance index for each vehicle test and established the co-simulation environment for the handling test evaluation. This study found that when a vehicle is controlled by applying the torque vectoring system, handling performance was improved according to controllability and safe mode by verifying the simulation.

      • SnO₂ 나노선 네트워크 센서의 제작과 특성

        박재영,최선우,Jhang Jin,김상섭 한국표면공학회 2009 한국표면공학회 학술발표회 초록집 Vol.2009 No.10

        단일 나노선 적용 센서의 단점을 극복하고 신뢰성이 높은 센서를 구현하고자 vapor-liquid-solid (VLS) 법을 이용하여 SnO₂ 나노선의 선택적 성장을 통한 나노선 네트워크 구조의 센서를 제조하였다. 분리된 전극층의 변화에 따른 나노선의 접합 특성 변화와 이에 따른 나노선 네트워크 센서의 가스감지 특성을 고찰하였다.

      • KCI등재
      • KCI등재

        무안구증 환자에서 안와 삽입물 삽입과 진피-지방 이식 동시 수술의 결과

        박재영,최희영 대한안과학회 2015 대한안과학회지 Vol.56 No.2

        목적: 의안을 착용할 수 없을 정도로 결막낭이 부족한 안구로 환자나 심한 안와 삽입물의 노출이 있는 환자를 대상으로 안와 삽입물 삽입술과 진피-지방 이식을 동시에 시행한 경우의 임상적 효과에 대해 알아보고자 하였다. 대상과 방법: 2007년부터 2012년까지 본원 안과 방문한 환자 중 안와 삽입물 삽입술 시 부족한 결막낭을 보충하기 위해 진피-지방이식을 동시에 시행한 후 2년 이상 경과 관찰한 환자를 대상으로 후향적 의무기록조사를 하였다. 대상은 총 8안이었으며 모두 안구로혹은 안와 삽입물 노출에 대한 치료 위해 내원한 환자였다. 결과: 총 8안 중 삽입물 노출로 진단받은 환자 5안(62.5%)에서 삽입물 교체술 및 진피-지방 이식술을 시행하였고 2안(25%)은 무안구증 함몰 환자로 삽입물의 2차적 삽입술 시 진피-지방 이식을 하였고 안구로 환자 1안(12.5%)은 안구내용제거술 시 삽입물 삽입술과진피-지방 이식술을 같이 시행하였다. 술 후 평균 경과 관찰 기간은 46.3개월이었다. 창상 치유 과정 결과는 8안 중 7안(87.5%)에서는 합병증 없이 창상이 결막화되었으며 1안(12.5%)은 삽입물 제거 후 재삽입술 및 진피-지방 이식술을 시행 후 5개월째 삽입물 재노출로 진피-지방 재이식술을 시행하였고 이후 노출은 관찰되지 않았다. 이후 모든 환자군에서 의안 착용과 전체적인 미용적 외관에서만족하였다. 결론: 안와 삽입물 삽입술과 동시에 시행한 진피-지방 이식술은 결막낭 보충과 함께 안구 용적 보충에 효과적인 것을 알 수 있었다 Purpose: To investigate the clinical results of patients who have undergone simultaneous dermo-fat graft and insertion of orbitalimplants in patients who are unable to put on an ocular prosthesis due to severe conjunctival sac contracture or large orbital implantexposure. Methods: A retrospective analysis was performed of patients who underwent dermo-fat graft simultaneously with orbital implantinsertion for replacement of the conjunctival sac from 2007 to 2012. Eight eyes were enrolled in this study and all patients werefollowed up for phthisis bulbi or implant exposure. Results: Among the eight eyes, five eyes (62.5%) that were diagnosed with orbital implant exposure underwent orbital implantexchange and dermo-fat graft, and two eyes (25%) were anophthalmic enophthalmic patients and underwent secondary orbitalimplant insertion and dermo-fat graft. One patient (12.5%) underwent orbital implant insertion and dermo-fat graft simultaneouslyduring the evisceration operation. We followed the progress for 46.3 months. For seven out of eight eyes, the results of the wound healing process were successful. One patient underwent removal and reinsertionof the orbital implant with dermo-fat graft, and the wound in this case healed well. However, after five months, dermo-fatre-graft was performed for orbital implant re-exposure and it was not exposed thereafter. Overall cosmetic appearance was satisfactory in each patient, and all patients were able to comfortably retain a prosthesis. Conclusions: We found that undergoing dermo-fat graft simultaneously when performing orbital implant insertion is effective for replacement of the conjunctival sac and orbital volume.

      • KCI등재

        Discussion and improvement plan for the integration of social studies in korean secondary schools - Focusing on the textbook of high school <Integrated Social Studies> -

        박재영 역사와교육학회 2022 역사와 교육 Vol.35 No.-

        The ideal that Korean social studies education has pursued since World War II was the desirable realization of an integrated social studies curriculum. However, the conflict between the three social departments (sociology, history, geography) and the department including the ethics department has not been resolved over the content structure method of the social studies department of ‘department versus division’. The discussion of the integration of the social studies curriculum and the subdivision system can be divided into problems in the curriculum, problems in the school field, and problems in teacher training. In particular, in relation to the revision of the curriculum, it should be pointed out that teachers who are conducting social studies classes for students directly at school sites have been largely neglected. However, even under such circumstances, at least nominal (the government's will and direction to revise the curriculum) or formal (the cause of integration of the social studies department for cultivating desirable democratic citizens) efforts have been aimed at an integrated social studies department. In this article, first, an overview of the issues and conflicts of the three social studies (general society, geography, and history) surrounding social studies education so far has been reviewed. Second, Key issues were identified in the curriculum development process of high school .Third, I identified the practical problems that are appearing in the implementation process of the high school . Fourth, improvement measures were suggested in the major teacher training and teacher training program operation. Finally, what kind of policy alternatives are needed to implement the ideal of the curriculum through school education is presented.

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