• Title/Summary/Keyword: 단독확인

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Study on the Wall Effect Correction for Propeller Open Water Characteristics in the Medium Size Cavitation Tunnel (중형 공동수조에서의 프로펠러 단독특성에 대한 위벽효과 보정 연구)

  • Suh, Sung-Bu;Kim, Ki-Sup
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.5
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    • pp.718-724
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    • 2010
  • This paper studies the differences due to the wall effect in propeller open water(POW) characteristics tested in a towing tank and in a medium size cavitation tunnel(CT). When the advanced velocity of the propeller is defined as the flow velocity measured in the plane of propeller, POW characteristics resulting from CT has a better relationship with them of towing tank. To obtain the wall effect in the propeller plane, numerical computation using the lifting panel theory is performed with and without the wall around a propeller. Then, POW results in CT are corrected based on the wall effect from numerical results. The POW results obtained from this procedure show a better agreement with the experimental results in the towing tank.

Algorithm for Anti-Islanding of the Grid Connected Single Phase PV Inverter (계통연계형 태양광 단상 인버터의 단독운전 방지를 위한 알고리즘)

  • Hwang, Uiseon;Seo, Jinbum;Kwon, Hyosang;Kim, Deokki;cho, Youngkyun;Min, Joonki
    • Proceedings of the KIPE Conference
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    • 2014.07a
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    • pp.363-364
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    • 2014
  • 본 논문에서 제안한 단독운전 알고리즘은 무효전력 주입을 기반으로 설계하였다. 정상상태에서는 무효전력을 주입하지 않고 계통전압, 고조파, 주파수의 변동을 확인하여 제 1차와 2차 단계를 통해 무효전력의 주입량과 주입 방향을 결정하여 주입한다. 제안한 방법을 통하여 단독으로 운전될 때 뿐만 아니라 다수대 병렬운전할때도 단독운전을 200ms 이내에 검출됨을 확인하였다.

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Choneophora trispora 혼합배양에 의한 $\beta$-Ca-rotene의 생합성에 관한 연구

  • Yoo, Ju-Hyun;Yang, Kang;Park, Jung-Gil;Kim, Dong-Jin
    • Proceedings of the Korean Society for Applied Microbiology Conference
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    • 1976.04a
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    • pp.183.2-183
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    • 1976
  • Choneophora trispora 단독 혹은 혼합배양하여 Carotene과 Vitamin A의 생성을 연구하였다. 1) $\beta$-Carotene 생성량은 chonephora trispora의 (+)주보다 (-)주가 좋았고 단독배양보다 혼합배양이 좋았다. 2) $\beta$-cionone은 $\beta$-carotene 생합성을 촉진하였다. 3) FeCl$_3$은 균생육과 $\beta$-carotene 생합성을 저해하였다. 4) 균체추출물은 ergosterol, carotene은 확인할 수 있으나 vitamin A는 확인 할수 없었다.

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Anti-islanding Detection of a AFD Method applied to Grid Connected Micro Inverter (계통연계형 소용량 태양광 인버터에 적용된 AFD 방식의 단독운전 검출기법)

  • Kwak, Raeho;Lee, June Hee;Lee, Kyo-Beum
    • Proceedings of the KIPE Conference
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    • 2015.07a
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    • pp.524-525
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    • 2015
  • 본 논문은 계통연계형 소용량 태양광 인버터에 적용된 AFD(Active Frequency Drift) 기반의 단독 운전 검출 기법을 제안한다. 태양광 시스템에 일반적인 인버터 토폴로지를 사용한 경우, 무효전력 주입을 이용하여 단독운전 검출이 가능하다. 하지만 무효전력의 제어가 불가능한 인버터를 사용한 경우에는 기존의 무효전력을 이용하는 단독운전 검출기법을 사용할 수 없다. 무효전력의 제어가 불가능한 인버터 토폴로지에 새로운 스위칭 기법을 적용하면 무효전력을 주입한 효과를 얻을 수 있고, 이를 통해 기존의 AFD 방식을 응용하여 단독운전 검출이 가능한 새로운 검출기법을 제안하였다. 제안하는 검출기법은 기존의 AFD 방식보다 인버터 출력전류의 THD (Total Harmonic Distortion)를 개선할 수 있는 장점이 있다. 제안하는 기법의 성능을 시뮬레이션을 통해 확인하였다.

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Effects of combined acupuncture and gabapentin treatment on chemotherapy-induced peripheral neuropathy: a pilot, randomized, assessor-blinded, controlled trial

  • Hyun Jung Jung;Dae Jun Kim;Joon Seok Byun
    • Journal of Korean Traditional Oncology
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    • v.28 no.1
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    • pp.33-44
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    • 2023
  • 목적: 항암유발말초신경병증은 암 환자가 겪는 흔한 항암 부작용이나 현재까지 효과적으로 알려진 치료법은 없다. 본 연구의 목적은 항암유발말초신경병증에 대한 침 치료와 가바펜틴의 병용 요법의 효과와 안전성을 평가하는 것이다. 방법: 항암유발말초신경병증을 겪고 있는 24명의 암 환자를 침 치료 단독군 (AG, acupuncture group)과 침과 가바펜틴의 병용요법군 (CG, combined acupuncture and gabapentin group)으로 무작위 배정하였다. 두 그룹 모두 침 치료는 주 3회, 4주간 수행하였다. 병용 요법군은 침 치료와 더불어 1일 900mg의 가바펜틴을 복용하도록 하였다. 치료 효과는 Neuropathic Pain Symptom Inventory (NPSI), visual analogue scale (VAS), European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Chemotherapy-Induced Peripheral Neuropathy 20 items (EORTC-CIPN20)를 이용하여 측정하였다. 치료로 인한 부작용은 대상자가 방문할 때마다 조사하였다. 결과: 총 23명의 대상자(AG, n=12; CG, n=11)의 평가지표를 분석한 결과, 치료 4 주 후 침 치료 단독군은 NPSI 점수가 44.33±25.04에서 30.58±21.55으로 감소하였고, 병용 요법군은 30.55±25.59에서 18.64±19.42로 감소하였으며, 두 군 모두 통계적으로 유의미하게 감소하였다(p<0.001). VAS점수는 침 치료 단독군에서는 4.79±2.17 에서 3.42±2.49으로 감소하였고, 병용 요법군에서는 3.55±2.07에서 2.73±2.49 로 감소하였다(p<0.05). 치료 효과는 치료 완료 2주후까지 지속되었으며, 두 군간의 유의미한 차이는 없었다. EORTC-CIPN20은 침 치료 단독군은 30.27±18.87에서 20.84±16.35으로 감소하여(p<0.01), 두 군 모두에서 삶의 질이 향상되었다. 결론: 본 연구로 침 치료와 가바펜틴의 병용 요법이 항암유발말초신경병증 환자의 증상 및 삶의 질 개선에 효과적이며 안전한 치료법임을 확인하였다. 그러나 침 치료와 가바펜틴의 시너지 효과에 대해서는 확인 할 수 없었으며, 이를 확인하기 위해 추가적인 연구가 필요할 것으로 사료된다.

Analysis of Open-Water Characteristics of Marine Propeller by Computational Method for Viscous Flow (점성유동 수치해석법에 의한 선박용 추진기 단독성능 해석)

  • Dug-Soo Kim;Hyoung-Tae Kim
    • Journal of the Society of Naval Architects of Korea
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    • v.39 no.3
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    • pp.8-17
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    • 2002
  • In this paper, the computational analysis of open-water characteristics for three model propellers(P4119, P4842 and 3 podded propeller of KRISO) is done by using a viscous-flow method based on Reynolds-Averaged Navier-Stokes equations. The results are presented for open-water performances, blade-section pressures, and circumferentially-averaged velocity profiles for the all three propeller models. Overall close agreements with available experimental data are shown. However, some discrepancies are also found in the pressure near the leading edge of the propeller blade and the open-water performance of the podded propellers.

A study on the facial palsy patients' use of Western-Korean collaborative treatment: Using Health Insurance Review & Assessment Service-National Patients Sample (얼굴마비 환자의 의·한의 협진 의료이용 연구: 건강보험심사평가원 환자표본 데이터를 이용)

  • Park, Hyo Sung;Uhm, Tae Woong;Kim, Nam Kwen
    • Journal of the Korean Data and Information Science Society
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    • v.28 no.1
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    • pp.75-86
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    • 2017
  • The facial palsy is one of the most common illness in Western-Korean collaborative treatment (hereinafter "collaborative treatment"). The purpose of this study is to analyze facial palsy patients'collaborative treatment use patterns. By analysing the 2014 National Health Insurance Review and Assessment Patient Sample Data (NPS 2014) with the episode of care unit, we have found the following results. First, the collaborative treatment is preferred by patients over 50 years old and female. Second, western medicine mainly focuses on diagnosis and medical examination while korean medicine and collaborative treatment focus more on treatment activity. Third, western medicine showed the shortest treatment period, followed by korean medicine and collaborative treatment. However, the cost of medical treatment per day is highest in western medicine. The analysis of the use patterns of collaborative treatment shown in the study is expected to provide a direction for the development of clinical practice guidelines and the establishment of medical policies in the future.

Development and Effectiveness of Smartphone Application for the Medication Confirmation of High-alert Medications (고 위험약물의 투약확인을 위한 스마트 폰 어플리케이션의 개발 및 효과)

  • Kim, Myoung Soo
    • Korean Journal of Adult Nursing
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    • v.26 no.3
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    • pp.253-265
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    • 2014
  • Purpose: This study was done to develop and evaluate a smartphone application for the medication confirmation of high-alert medications. Methods: A nonequivalent control group non-synchronized design was used for this study. Participants in the treatment group used the application for four weeks. Data were analyzed using descriptive analysis, ${\chi}^2$-test, and t-test for the homogeneity of participants, and a paired t-test for effectiveness in each group with the SPSS 18.0. Results: Stability of medication administration was estimated by knowledge and certainty, ranged from a score of one to three. A correct answer with high certainty was coded as high stability, low certainty regardless of correct answer was coded as a moderate stability, and incorrect answers with high certainty were rated as low stability. There were no differences in 'knowledge of high alert medication', 'Certainty of knowledge', 'stability of medication administration', 'confidence of single checking medication', and 'medication safety activities' between the treatment group and the comparison group. The treatment group reported a greater difference between pretest and post-test in 'certainty of medication knowledge' (t=3.51, p=.001) than the comparison group. Conclusion: Smartphone application for medication confirmation of high-alert medications will provide an important platform for reducing medication errors risk.

Mono-Rifampicin-Resistant Pulmonary Tuberculosis (Rifampicin단독내성 폐결핵)

  • Shim, Tae-Sun;Lee, Ki-Man;Lim, Chae-Man;Lee, Sang-Do;Koh, Youn-Suck;Kim, Woo-Sung;Kim, Dong-Soon;Kim, Won-Dong
    • Tuberculosis and Respiratory Diseases
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    • v.46 no.5
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    • pp.618-627
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    • 1999
  • Background : Rifampicin (RFP) is a key component of the antituberculous short-course chemotherapy. Usually the RFP resistant M.tuberculosis is also resistant to isoniazid (INH), so the RFP resistance is the marker of multi-drug resistant (MDR) tuberculosis. But unusual cases of mono-RFP-resistant tuberculosis have been recently reported with increasing frequency, especially associated with HIV infection in western countries. Therefore, we conducted a retrospective study to investigate the frequency, causes, and the clinical characteristics of mono-RFP-resistant tuberculosis in Korea. Methods : Of the bacteriologically confirmed and susceptibility-proven 699 pulmonary tuberculosis patients (921 isolates) who visited Asan Medical Center from January 1990 to August 1997, eighteen patients with INH-susceptible and RFP-resistant tuberculosis were evaluated. Previous history of tuberculosis, antituberculous drug compliances, associated systemic illness, drug susceptibility patterns, and clinical outcomes were analysed. And rpoB gene sequencing was done in 6 clinical isolates of M. tuberculosis. Results : The mean age of 18 patients was $43{\pm}14$ years, and the sex ratio is 12:6 (M : F). Sixteen (89%) patients had previous history of tuberculosis. None had diagnosed gastrointestinal disorders, and 2 HIV tests that were performed came out negative. Susceptibility tests were done repeatedly in eleven patients, and six (55%) were mono-RFP resistant repeatedly while five (45%) evolved to MDR tuberculosis. Eight (44%) patients were cured, six (33%) failed, three (17%) were lost to follow-up, and the other one is now on treatment. rpoB gene sequencing showed 5 mutations, codon 531 TCG to TIG mutation in 4 isolates and 526 CAC to TAC in 1 isolate. Conclusion : The clinical characteristics of mono-RFP resistant tuberculosis were similar to that of MDR tuberculosis in Korea where the HIV infection rate is lower than western countries. But some patients with mono-RFP-resistant tuberculous could be cured by primary drug regimens including RFP, suggesting that mono-RFP-resistant tuberculous is a different entity from MDR tuberculosis.

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A study on compensation of incorrect recognition on HMM using multilayer perceptrons (신경망을 이용한 HMM의 오인식 보상에 관한 연구)

  • Pyo Chang Soo;Kim Chang Keun;Hur Kang In
    • Proceedings of the Acoustical Society of Korea Conference
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    • spring
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    • pp.27-30
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    • 2000
  • 본 논문은 HMM(Hidden Markov Model)을 이용하여 인식을 수행할 경우의 오류를 최소화 할 수 있는 후 처리 과정으로 신경망을 결합시켜 HMM 단독으로 사용하였을 때 보다 높은 인식률을 얻을 수 있는 HMM과 신경망의 하이브리드시스템을 제안한다. HMM을 이용하여 학습한 후 학습에 참여하지 않은 데이터를 인식하였을 때 오인식 데이터를 정인식으로 인식하도록 HMM의 출력으로 얻은 각 출력확률을 후 처리에 사용될 MLP(Multilayer Perceptrons)의 학습용으로 사용하여 MLP를 학습하여 HMM과 MLP을 결합한 하이브리드 모델을 만든다. 이와 같은 HMM과 신경망을 결합한 하이브리드 모델을 사용하여 단독 숫자음과 4연 숫자음 데이터에서 실험한 결과 HMM 단독으로 사용하였을 때 보다 각각 약 $4.5\%$, $1.3\%$의 인식률 향상이 있었다. 기존의 하이브리드 시스템이 갖는 많은 학습시간이 소요되는 문제점과 실시간 음성인식시스템을 구현할 때의 학습데이터의 부족으로 인한 인식률 저하를 해결할 수 있는 방법임을 확인할 수 있었다.

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