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하수처리장 적용을 위한Semi-카플란 수차가 장착된 마이크로수력발전 시스템
채규정(Kyu Jung Chae),김동수(Dong Soo Kim),천경호(Kyung Ho Cheon),김원경(Won Kyoung Kim),김정연(Jung Yeon Kim),이철형(Chul Hyung Lee),박완순(Wan Soon Park) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.5
소수력발전은 하수처리장 에너지 자립을 위한 효과적인 대안이다. 본 연구는 유량변동이 크고 유효낙차가 낮은 중소형하수처리장(기흥레스피아) 적용을 위해 피치조절형 세미카플란(semi-kaplan) 마이크로수력발전의 적용 타당성을 평가하였다. 가변피치 semi-kaplan 수차는 유량조절을 위한 가이드베인은 생략하고 피치조절형 런너를 장착하여 기계적 결함은 줄이면서 유량변동이 큰 처리장에 특화된 기술이다. 마이크로수력발전 시스템은 설계조건(유량 0.35 m3/s, 유효낙차 4.7 m)에서 90.2%의 수차효율 달성이 가능하였고 발전용량은 13.4 kW로 산정되었다. 설비가동률 74%로 가동 시 연간 약 86.8 MWh 에너지 생산을 통해 2.1%의 에너지 자립이 가능하고 이는 연간 49톤의 CO₂ 감축효과와 맞먹는다. 경제성 평가결과 초기 건설공사비가 200,000,000원 이하인 경우에는 내부수익률은 6.1%, 순현가는 15,539,000원, 편익-비용률은 1.08, 투자회수년은 15.5년으로 경제성이 충분한 것으로 나타났다. Small scale hydropower is one of most attractive and cost-effective energy technologies for installation within sewage treatment plants. This study was conducted to evaluate the potential of a semi-kaplan micro-hydropower (MHP) system for application to sewage treatment plants with high flow fluctuations and a low head. The semi-kaplan MHP is equipped with an adjustable runner blade, and is without a guide vane, so as to reduce the incidence of mechanical problems. A MHP rating 13.4 kWp with a semi-kaplan turbine has been considered for Kiheung Respia sewage treatment plant, and this installation is estimated to generate 86.8 MWh of electricity annually, which is enough to supply electricity to over 25 households, and equivalent to an annual reduction of 49 ton CO₂. The semi-kaplan turbine showed a 90.2% energy conversion efficiency at the design flow rate of 0.35 m3/s and net head of 4.7 m, and was adaptable to a wide range of flow fluctuations. Through the MHP operation, approximately 2.1% of total electricity demand of Kiheung Respia sewage treatment plant will be achievable. Based on financial analysis, an exploiting MHP is considered economically acceptable with an internal rate of return of 6.1%, net present value of 15,539,000 Korean Won, benefit- cost ratio of 1.08, and payback year of 15.5, respectively, if initial investment cost is 200,000,000 Korean Won.
소기숙,최회강,박소영,고강훈,김성남,이옥자,윤민영,문형철,김성철,이정훈,나원경,So, Ki-suk,Choi, Hoi-kang,Park, So-young,Koh, Kang-hun,Kim, Sung-nam,Lee, Ok-ja,Yun, Min-young,Mun, Hyung-chul,Kim, Sung-chul,Lee, Jung-hun,Na, Won-kyung 대한침구의학회 2004 대한침구의학회지 Vol.21 No.1
Objective: Recently scolopendrid aquacupuncture has been a good effect on pain control but it has not been known about clinical safety. So, In order to prove the clinical safety of scolopendrid aquacupuncture, We have observed the physical reac-tion and clinical pathology test after scolopendrid aquacupuncture treatment. Methods: We analyzed physical reaction and clinical pathology test before and after Scolopendrid aquacupuncture treatment of 30 patients suffering from pain, who admitted department of Acupunture and Moxibustion, College of Oriental Medicine, Won-Kwang University Kwangju hospital. Results & Conclusions: The results were summarized as follows. 1) The distribution of sex was 14 males and 16 females, and the average of patients age was 46.2 years. 2) The distribution of symptom was lumbago, lumbago with radiating pain, nuchal pain and knee joint pain. 3) In the 30 patients treated with Scolopendrid aquacupuncture, hematologic test did not show remarkable change. 4) In the 30 patients treated with Scolopendrid aquacupuncture, Liver function test(AST, ALT, ALP) showed a slight decrease on the contrary, and abnormal rate showed a decrease of 1.0%(from 3.3% to 2.3%) compared with previous study. 5) In the 30 patients treated with Scolopendrid aquacupuncture, Renal function test(BUN, Cr) and abnormal rate(from 2.5% to 2.0%) showed a slight decrease on the contrary. 6) In the 30 patients treated with Scolopendrid aquacupuncture. Electrolyte were normal range before & after treatment. 7) In the results of the Urine analysis of 30 patients, Leukocyte, Protein. Glucose, Keton, Bilirubin, U-bilinogen were not detected before and after Scolopendrid aquacupuncture treatment, and the rest almost made no difference. 8) In the Physical reactions, all of the patients complained of pain of body partially, only one patient showed reddish and itch, but symptoms like those were entirely disappeared within 24 hours and whole body pain, swelling, headache, dizziness, fatigue and nausea was not observed.
( Won Kyung Hong ),( Sun Yeon Heo ),( Hye Mi Park ),( Chul Ho Kim ),( Jung Hoon Sohn ),( Akihiko Kondo ),( Jeong Woo Seo ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.6
The gene encoding squalene synthase (SQS) of the lipidproducing heterotrophic microalga Aurantiochytrium sp. KRS101 was cloned and characterized. The krsSQS gene is 1,551 bp in length and has two exons and one intron. The open reading frame of the gene is 1,164 bp in length, yielding a polypeptide of 387 predicted amino acid residues with a molecular mass of 42.7 kDa. The deduced krsSQS sequence shares at least four conserved regions known to be required for SQS enzymatic activity in other species. The protein, tagged with His6, was expressed into soluble form in Escherichia coli. The purified protein catalyzed the conversion of farnesyl diphosphate to squalene in the presence of NADPH and Mg2+. This is the first report on the characterization of an SQS from a Thraustochytrid microalga.
( Won Chul Shin ),( Jung Dong Seo ),( Sang Min Lee ),( Nam Hoon Moon ),( Jung Sub Lee ),( Kuen Tak Suh ) 대한고관절학회 2017 Hip and Pelvis Vol.29 No.2
Purpose: We evaluated the geometric discrepancies between the proximal femur in Koreans and two types of proximal femoral nail using plain radiographs. Materials and Methods: A total of 100 consecutive patients (38 treated with proximal femoral nail antirotation [PFNA], 62 PFNA II) with intertrochanteric fracture were retrospectively identified. The minimum follow up period was 32 months. The geometric analysis of the proximal femur was performed using preoperative true hip antero-posterior radiographs of the unaffected side, and the data were compared with the PFNA and PFNA II dimensions. Postoperative assessments were performed using postoperative radiographs for the proximal protruding length of nail tip, quality of reduction, implant position and the presence of lateral cortical impingement. Results: The geometric dimensions of the proximal femur were different between the two proximal femoral nail types. No impingement was detected in patients treated with PFNA II, whereas 13 cases of lateral impingement were observed in patients treated with PFNA. A significant association was observed between the short proximal femur and the presence of lateral cortical impingement (P=0.032) and between impingement and intraoperative reduction loss (P=0.012). Proximal protrusion of the nail tip was seen in 71 patients and no difference was observed between two groups. Conclusion: Our study demonstrates that the flat lateral surface of PFNA II can avoid lateral cortical impingement, which provide better fixation for intertrochanteric fracture. However, there was still a problem associated with longer proximal end of PFNA II compared with the proximal femoral length in Korean.
Jung, Ye-Ha,Kim, Hyeonjin,Jeon, So Yeon,Kwon, Jeong Min,Kim, Yong Chul,Lee, Won Joon,Lee, Dasom,Lee, Jun-Young,Moon, Jee Youn,Kang, Do-Hyung Wolters Kluwer Health | Lippincott Williams Wilkin 2019 NEUROREPORT - Vol.30 No.2
The aim of this study was to investigate distinct neurometabolites in the right and left thalamus and insula of patients with complex regional pain syndrome (CRPS) compared with healthy controls using proton magnetic resonance spectroscopy. Levels of N-acetylaspartate (NAA), N-acetylaspartylglutamate (NAAG), myo-inositol (ml), glutamine (Gln), glycerophosphocholine (GPC), glutathione (GSH), and alanine (Ala) relative to total creatine (tCr) levels, including creatine and phosphocreatine, were determined in the right and left thalamus and insula in 12 patients with CRPS compared with 11 healthy controls using magnetic resonance spectroscopy. Levels of NAAG/tCr and Ala/tCr were higher in patients with CRPS than in controls in the left thalamus. NAAG/tCr, ml/tCr, and Gln/tCr levels were higher but NAA/tCr levels were lower in the right insula of patients with CRPS compared with controls. There were negative correlations between GSH/tCr and pain score (McGill Pain Questionnaire) in the left thalamus. These findings are paramount to understand and determine all aspects of the complex pathophysiological mechanisms that underlie CRPS, including involvement of the central and parasympathetic nervous systems as well as oxidative stress and antioxidants. Thus, the distinct metabolites presented herein may be essential to understand a strong diagnostic and prognostic potential for CRPS and to develop effective medical treatments.
P200 : Phototrichogram analysis of normal scalp hair characteristics with aging
( Jung Eun Kim ),( Joo Hyun Lee ),( Kwang Hyun Choi ),( Won Soo Lee ),( Gwang Seong Choi ),( Oh Sang Kwon ),( Moon Bum Kim ),( Chang Hun Huh ),( Chull Wan Ihm ),( Young Chul Kye ),( Byung In Ro9 ),( W 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Phototrichogram analysis of normal scalp hair characteristics in Asian populations is not well characterized. Objectives: To investigate the normal hair characteristics of South Koreans using a phototrichogram. Methods: We enrolled 674 males and 683 females between the ages of 10 and 69. Hair density, thickness and the white hair percentage were measured via phototrichogram. Six scalp sites, including front, top, the peak between top and back, back, and the right and left sides were targeted. Results: The mean hair density, hair thickness, and the white hair percentage were not significantly different between genders at any scalp site. The mean hair density and thickness were significantly different according to scalp sites. Hair density declined with age, especially at the peak between top and back. Males and females showed different patterns of aging in hair density. Hair thickness changed little with age. But, mean hair thickness generally tended to increase until the 20s, reach a plateau between the 20s and 50s, and decrease after the 50s. The mean white hair percentages were 1.84 ± 4.24% in males and 1.66 ± 4.21% in females. The mean white hair percentages were significantly increased in subjects greater than 40 years of age. Conclusion: We described the normal characteristics and aging patterns of scalp hair in a Korean population.
Won Jung Jung(정원정),Seong Hee Choi(최성희),Chul-Hee Choi(최철희) 한국언어청각임상학회 2019 Communication Sciences and Disorders Vol.24 No.3
배경 및 목적: 음성범위프로파일(Voice Range Profile, VRP)은 발성기능을 평가하는 객관적 음성평가방법 중 하나로 임상에서 자주 사용된다. 본 연구의 목적은 기존의 VRP 측정법에 따른 최대 발성 수행력의 측정치를 비교하고 새로운 축약된 VRP 측정법을 개발하여 임상적 적용을 위한 타당도를 검증하고자 한다. 방법: 청년층 총 40명(남 20, 여 20)을 대상으로 하여 CSL의 Voice Range Profile 프로그램을 사용하여 최저 및 최고주파수, 주파수범위, 최소 및 최대강도, 강도범위를 측정하였으며, 참여자의 20%를 무작위로 선정하여 새로 개발된 축약된 VRP 검사법을 평가하였다. 결과: 모음의 종류에 따른 VRP 비교 시, 모음 /ㅏ/를 사용했을 때 가장 넓게 나타났으며, 측정 횟수에 따른 VRP 비교 시, 5회 실시하였을 때 가장 넓게 나타났다. 측정방법에 따른 VRP 비교 시, 반음으로 실시하였을 때 더 넓게 나타났다. 새로 개발된 VRP 검사 프로토콜은 최저 및 최고주파수, 주파수범위, 최대강도가 가장 넓거나 반음과 유사하게 나타났다. 반면 최소강도, 강도범위는 반음이 더 넓게 나타났으나 축약된 VRP 검사법과 통계적으로 유의한 차이를 보이지 않았다(p>.05). 논의 및 결론: 새로 개발된 축약된 VRP 검사법은 신뢰로운 음성범위를 측정하는 데 실현가능하며 효과적이었다. 축약된 VRP 검사법은 훈련받은 전문적 음성사용자를 위해 수정 보완되어야 하며, 추후의 연구에서는 개발된 VRP 검사법을 사용하여 음성장애 환자에게 적용하는 연구로 확장되어야 할 것이다. Objectives: Voice Range Profile (VRP) has been widely used as an objective voice assessment method in the clinical practice to evaluate vocal function. The objective of this study was to compare the maximum vocal performance among the current VRP measurement protocols and to develop a novel short-form of VRP measurement method based on its validation. Methods: Forty young adults (20 males, 20 females) participated for VRP measures and 20% participants (4 males, 4 females) were randomly selected for testing a novel simplified VRP protocol. Minimum F0, maximum F0, frequency range, minimum & maximum intensity, and intensity range were measured and compared among the different VRP protocols using the VRP program. Results: Among the different vowel types to elicit the maximal VRP performance measures, the largest voice range was observed in vowel /a/. In terms of repetition measurements, it was the largest when it was carried out five times. In addition, among different procedures to elicit, the semitone scale demonstrated significantly wider range than glissando (p<.05). Moreover, a novel simplified VRP protocol represents a significantly wider frequency range than that of the other VRP protocols (p<.05). On the other hand, the intensity range was the largest in semitone (p<.001), but there was no significant difference between the semitone and novel simplified VRP. Conclusion: A newly developed VRP measurement method was feasible and effective to obtain a reliable vocal range. This simplified protocol should be adapted for trained professional voice users and future research should expand to test its validity for the dysphonia population.