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- 저자 : 권병기(Byung-ki Kwon) (검색결과 58 건)
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권병기,안형준,강진규,김종열,최종훈,Kwon, Byung-Ki,Ahn, Hyoung-Joon,Kang, Jin-Kyu,Kim, Chong-Youl,Choi, Jong-Hoon 대한안면통증구강내과학회 2006 Journal of Oral Medicine and Pain Vol.31 No.4
Along with the development of scientific technologies, health care has been growing remarkably, and as the social life quality improves with increasing interest in health, the demand for medical service is rapidly increasing. However, medical accident and medical dispute also are rapidly increasing due to various factors such as, increasing sense of people's right, lack of understanding in the nature of medical practice, over expectation on medical technique, commercialize medical supply system, moral degeneracy and unawareness of medical jurisprudence by doctors, widespread trend of mutual distrust, and lack of systematized device for solution of medical dispute. This study analysed 30 cases of civil suit in the year between 1994 to 2004, which were selected among the medical dispute cases in dental field with the judgement collected from organizations related to dentistry and department of oral medicine, Yonsei university dental hospital. The following results were drawn from the analyses: 1. The distribution of year showed rapid increase of medical dispute after the year 2000. 2. In the types of medical dispute, suit associated with tooth extraction took 36.7% of all. 3. As for the cause of medical dispute, uncomfortable feeling and dissatisfaction with the treatment showed 36.7%, death and permanent damage showed 16.7% each. 4. Winning the suit, compulsory mediation and recommendation for settlement took 60.0% of judgement result for the plaintiff. 5. For the type of medical organization in relation to medical dispute, 60.0% was found to be the private dental clinics, and 30.0% was university dental hospitals. 6. For the level of trial, dispute that progressed above 2 or 3 trials was of 30.0%. 7. For the amount of claim for damage, the claim amounting between 50 million to 100 million won was of 36.7%, and that of more than 100 million won was 13.3%, and in case of the judgement amount, the amount ranging from 10 million to 30 million won was of 40.0%, and that of more than 100 million won was of 6.7%. 8. For the number of dentist involved in the suit, 26.7% was of 2 or more dentists. 9. For the amount of time spent until the judgement, 46.7% took 11 to 20 months, and 36.7% took 21 to 30 months. 10. For medical malpractice, 46.7% was judged to be guilty, and 70% of the cases had undergone medical judgement or verification of the case by specialists during the process of the suit. 11. In the lost cases of doctors(18 cases), 72.2% was due to violence of carefulness in practice and 16.7% was due to missing of explanation to patient. Medical disputes occurring in the field of dentistry are usually of relatively less risky cases. Hence, the importance of explanation to patient is emphasized, and since the levels of patient satisfaction are subjective, improvement of the relationship between the patient and the dentist and recovery of autonomy within the group dentist are essential in addition to the reduction of technical malpractice. Moreover, management measure against the medical dispute should be set up through complement of the current doctors and hospitals medical malpractice insurance which is being conducted irrationally, and establishment of system in which education as well as consultation for medical disputes lead by the group of dental clinicians and academic scholars are accessible.
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권병기(Byung-Ki Kwon),정승기(Seung-Ki Jung),김태형(Tae-Hyeong Kim),김윤현(Yun-Hyun Kim) 전력전자학회 2015 전력전자학회 논문지 Vol.20 No.1
A static synchronous compensator (STATCOM) applied to rapidly changing, highly unbalanced loads such as electric arc furnaces (EAFs), requires both positive-sequence and negative-sequence current control, which indicates fast response characteristics and can be controlled independently. Furthermore, a delta-connected STATCOM with cascaded H-bridge configuration accompanying multiple separate DC-sides, should have high performance zero-sequence current control to suppress a phase-to-phase imbalance in DC-side voltages when compensating for unbalanced load. In this paper, actual EAF data is analyzed to reflect on the design of current controllers and a pioneering zero-sequence current controller with a superb transient performance is devised, which generates an imaginary -axis component from the presumed response of forwarded reference. Via simulation and experiments, the performance of the positive, negative, and zero-sequence current control of a cascaded H-bridge STATCOM for EAF is verified.
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산업현장에서 벡터제어용 유도전동기의 오프라인 파라미터 추정
권병기(Byung-Ki Kwon),박가우(Ga-Woo Park),신원창(Won-Chang Shin),조응상(Eung-Sang Cho),이진섭(Jin-Seop Lee),최창호(Chang-Ho Choi) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
Parameter estimation of induction motor for vector control presented in this paper can be easily implemented and applied to inverters in the industrial field, because it needs no additional hardware such as voltage sensor and measuring equipment. At first, the stator resistance including switching loss of inverter is measured by simple voltage-current equation. Next, in pre-magnetization of machine by imposing the d-axis constant field-current, q-axis torque current is forced to the machine until its speed feedback reachs to pre-defined level of speed limit. At this time, we can measure the rotor time-constant by decreasing the distorted output-voltage inverter. At last, stator inductance, transient inductance, and moment of inertia can be measured by the relationship of output voltage, output torque and speed feedback. The validity and usefulness of this method is verified by experimental results.<br/> <br/>
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백혈병 환자의 구강악안면 증상 발현에 관한 증례보고 (Oral Chronic GVHD)
안형준,권병기,신경진,최종훈,김종열,Ahn, Hyoung-Joon,Kwon, Byung-Ki,Shin, Kyoung-Jin,Choi, Jong-Hoon,Kim, Chong-Youl 대한안면통증구강내과학회 2000 Journal of Oral Medicine and Pain Vol.25 No.2
Subsequent to an allogenic stem cell transplantation(ASCT) on patients with hematologic malignancy(AML, ALL, CML, multiple myeloma, lymphoma etc.), chronic GVHD(graft versus host disease), which is an immunological reaction, occurs. With treatment results from patients who were diagnosed with ALL(acute lymphocytic leukemia), undergone BMT(bone marrow transplantation) and showed oral and skin lesions due to GVHD, treatment of oral manifestations of leukemia and its general management were studied. 90% of patients with chronic GVHD show change in the oral mucosa causing oral manifestations such as leukoplakia, lichenoid change of the oral mucosa, mucosal atrophy, erythema, ulceration and xerostomia. In treating GVHD, extensive systemic immunosuppression cause bacterial, viral, fungal infection that are fatal, and even if the treatment is successful, the patient is already in a severe immunosuppressed state. Therefore, localized target therapy is preferred. In another words, topical application(rinse, cream, ointment etc.) of cyclosporin and steroid in treating oral chronic GVHD is highly recommended, and the use of PUVA(Psoralen Ultraviolet A) and thalidomide is reported to be effective. In treating such diseases, dental treatment to control pain and prevent secondary infection of oral manifestations is very important. To those patients with systemic diseases who show limited effect by general dental treatment, non-invasive treatment such as the dental laser, in addition to the use of drugs, may be necessary to actively treat pain and help the healing process. For greater results, new effective methods are to be developed for treatment.
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안동기(Dong Ki Ahn),정기웅(Ki Woong Jeong),권병기(Byung Ki Kwon),차상규(Sang Kyu Cha),박관영(Kwan Young Park),조근호(Kun Ho Cho) 대한정형외과학회 2005 대한정형외과학회지 Vol.40 No.7
목적: 심한 골파괴와 하지동통을 동반한 척추 감염증 환자에서 후방 접근법을 이용한 감염조직의 제거술, 골이식술 그리고 척추경 나사못 고정술의 유용성을 평가하고자 하였다. 대상 및 방법: 상기한 술식으로 치료한 단분절의 요천추부 감염증 환자 중 2년 이상 추시가 가능했던 10예를 대상으로 후향적으로 조사하였다. 6예가 결핵성이었고 4예가 화농성 감염이었다. 방사선적 평가 기준은 골 유합, 시상각의 회복 정도로 하였으며 임상적 평가 기준은 요통과 하지 동통의 VAS, 마비의 회복정도로 하였다. 결과: 전례에서 견고한 골유합을 얻었다. 요추 시상각이 -3.6±12.5°에서 -1l.4±9.3°로 의미있게 교정되었으나(p=0.007), 수술 직후에 비하면 -16.2±10.2°에서 -1l.4±9.3°로 유의한 교정각 소설이 있었다(p=0.005). 요통은 수술 전 8.3±0.7에서 최종 2.6±1.6으로 호전되었으며(p=0.005), 하지 통증은 수술 전 6.8±2.1에서 수술 후 0.5±0.9로 호전되었다(p=0.005). 수술 전 상태를 통제한 최종 요통의 정도와 연령(r=0.79, p=0.011) 그리고 최종 하지 동통과 연령(r=0.75, p=0.020)사이에는 강한 양적 선형관계가 있었으며 최종 요통과 시상각(r=0.30, p=0.430) 그리고, 최종 하지동통과 시상각(r=0.41, p=0.274) 사이에는 유의한 상관관계가 없었다. 고정기기와 관련된 합병증이나 심부 창상감염은 발생하지 않았다. 결론: 단분절의 요천추부 척추 감염증에 있어서 후방 절개를 통한 감염조직의 제거술과 골이식술 그리고, 척추경 나사못 고정술은 골유합과 임상증상의 호전에 있어서 유용한 방법이었다. 이와 같은 술식에 의해 감염의 확산이나 창상의 감염은 발생하지 않았으며 유의한 시상각의 교정 효과가 있었다. 연령이 적을수록 요통과 하지 동통의 감소가 더 우수하였다. Purpose: To evaluate the efficacy of this operative method, which includes removal of infected materials, insertion of a bone graft and fixation with pedicle screws through a posterior-only approach in spondylitis with advanced bone destruction and radicular pain. Materials and Methods: Ten patients with refractory single level spondylitis of the lumbosacral spine, who underwent the above operation and were followed-up for more than 2 years, were analyzed retrospectively. Six cases were tuberculous and 4 cases were pyogenic in etiology. Radiologically, bone union and restoration of sagittal alignment were assessed. Clinically, Visual Analog Scales (VAS) for back pain, leg pain and resolution of neurologic symptom were analyzed. Results: Bone union was achieved in all cases. Sagittal angle was corrected significantly from -3.6±12.5° to -11.4±9.3° (p=0.007). However, loss of correction was noted from -16.2±10.2° at immediate after surgery to -11.4±9.3° at last follow-up (p=0.005). Back pain VAS was improved from 8.3±0.7 to 2.6±1.6 (p=0.005) and leg pain VAS was improved from 6.8±2.1 to 0.5±0.9 (p=0.005). There was strong positive correlation between age and final back pain (r=0.79, p=0.011) and leg pain VAS (r=0.75, p=0.020). There was no meaningful correlation between the sagittal angle and back pain (r=0.30, p=0.430) and leg pain VAS (r=0.41, p=0.274). Implant related complications and deep wound infections did not occur. Conclusion: In single level spondylitis of the lumbosacral spine, a posterior-only surgical approach is a useful method in which debridement, bone graft placement and pedicle screw fixation can be performed. This procedure did not provide increased risk with respect to infection control, and it allowed correction of the sagittal angle. The younger the age of the patients, the better the back pain and leg pain VAS results.
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