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김범석,신지훈,김기용,이용섭,김경래,태경,Kim, Bum-Suk,Shin, Ji-Hun,Kim, Ki-Yong,Lee, Yong-Seop,Kim, Kyung-Rae,Tae, Kyung 대한후두음성언어의학회 2008 대한후두음성언어의학회지 Vol.19 No.2
Background and Object: The aim of this study is to evaluate the change of patient's subjective voice handicap index (VHI) and acoustic parameters before and after laryngeal microsurgery for benign vocal cord disease. Materials and Method: We analyzed 78 patients who received laryngeal microsurgery for benign vocal cord disease from January 2004 to February 2007 retrospectively. There were 28 vocal polyp, 40 vocal nodule, 5 intracordal cyst and 5 Reinke's edema. Jitter, shimmer, harmony to noise ratio (HNR) were analyzed before surgery and 2-3months after surgery using the Doctor's speech science program. The voice handicap index introduced by the Pittsburgh Voice Center was used to examine patient's subjective change of voice quality. Results: Acoustic parameters of jitter, shimmer and HNR were improved in patients with vocal polyp and vocal nodule after surgery. The acoustic parameters were not improved in patients with Reinke's edema, statistically. Only jitter was improved significantly in patients with intracordal cyst (p<0.05). The VHI was significantly improved after surgery. The change of jitter and shimmer was significantly correlated with the change of VHI after surgery. Conclusion: The acoustic parameters and VHI were significantly improved in patients with benign vocal disease after laryngeal microsurgery.
김범석,장건,이종수,임형호,Kim, Beum-Seuk,Jang, Gun,Lee, Jong-Soo,Lim, Hyung-Ho 척추신경추나의학회 2006 척추신경추나의학회지 Vol.1 No.2
Objectives: The purpose of this study was to investigate the relationship among lumbar lordotic and obesity in Low Back Pain Patient Methods: The subjects of this study were patients with low back pain who visited Jung-Dong Oriental Hospital. X-ray were taken in lateral decubitus. The measurements of the Ferguson angles(FA) and the lumbar lordotic angles(LLA) were performed. We measured BMI and WHR has been accessed bio-impedance analyzer(inbody 3.0). This results were statistically analyzed using SPSS 12.0. Results 1. In female group. FA and LLA were significantly higher than male group. 2. LLA was shown to decrease to rise with increasing WHR and BMI 3. FA had no realtion with WHR and BMI Conclusions: This data shows that obesity related to mechanical structures such as lumbar curvature. Obesity can be a one of the stressor of lumbar spine, and one of the causing factor of low back pain.
BEMT에 의한 100kW 풍력터빈 블레이드 기본설계 및 출력 성능해석
김범석,김만응,이영호,Kim, Bum-Suk,Kim, Mann-Eung,Lee, Young-Ho 한국마린엔지니어링학회 2008 한국마린엔지니어링학회지 Vol.32 No.6
In this study, mathematical expressions based upon the conventional BEMT(blade element momentum theory) was applied to basic 100kW wind turbine blade configuration design. Power coefficient and related flow parameters, such as Prandtl's tip loss coefficient, tangential and axial flow induction factors of the wind turbine were analyzed systematically. X-FOIL was used to acquire lift and drag coefficients of the 2-D airfoils and Viterna-Corrigan formula was used o interpolate he aerodynamic characteristics in post-stall region. Also, aerodynamic characteristics, measured in a wind tunnel to calculate he power coefficient was applied. The comparative results such as axial and tangential flow factors, power coefficients were presented in this study. Power coefficient, calculated by in-house code was compared with the GH-Bladed result. The difference of the aerodynamic characteristics caused the difference of the performance characteristics as variation as TSR.
Detection of Nitroaromatic Compounds Based on Fluorescent Silafluorene Chemosensors
김범석,Kim, Bumseok The Basic Science Institute Chosun University 2010 조선자연과학논문집 Vol.3 No.1
A simple and rapid method is described for detecting nitroaromatic explosives in air or seawater with the use of photoluminescent organosilicon compounds. The synthesis, spectroscopic characterization, and fluorescence quenching efficiency of silafluorenes are reported. Silafluorenes were synthesized from the reduction of dilithiobiphenyl with dichlorosilanes. Two silafluorenes were used for the detection of nitroaromatic compounds. Detection of nitroaromatic molecules, such as 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), and picric acid (PA), has been explored. A linear Stern-Volmer relationship was observed for the first three analytes. Fluorescence spectra of silafluorenes obtained in either toluene solutions or thin films displayed no shift in the maximum of the emission wavelength. The photoluminescence quenching occurs by a static mechanism.
단주효과 및 고유주기를 고려한 비내진 학교시설의 반응 수정계수
김범석,박지훈,Kim, Beom Seok,Park, Ji-Hun 한국지진공학회 2019 한국지진공학회논문집 Vol.23 No.4
Response modification factors of school facilities for non-seismic RC moment frames with partial masonry infills in 'Manual for Seismic Performance Evaluation and Retrofit of School Facilities' published in 2018 were investigated in the preceding study. However, since previous studies are based on 2D frame analysis and limited analysis conditions, additional verification needs to be performed to further apply various conditions including orthogonal effect of seismic load. Therefore, this study is to select appropriate response modification factors of school facilities for non-seismic RC moment frames with partial masonry infills by 3D frame analysis. The results are as follows. An appropriate response modification factor for non-seismic RC moment frames with partial masonry infills is proposed as 2.5 for all cases if the period is longer than 0.6 seconds. Also if the period is less than 0.4 seconds and the ratio of shear-controlled columns is less than 30%, 2.5 is chosen too. However, if the period is less than 0.4 seconds and the ratio of shear-controlled columns is higher than 30%, the response modification factor shall be reduced to 2.0. If the period is between 0.4 and 0.6 seconds, then linearly interpolates the response correction factor.
도로터널 내 공기질 측정과 Bag Filter를 이용한 미세먼지 제거 성능평가
김범석,박일건,정동균,이상돈,홍민선,Kim, Beom-Seok,Park, IL-Gun,Jung, Dong-Gyun,Lee, Sang-Don,Hong, Min-Sun 한국터널지하공간학회 2015 한국터널지하공간학회논문집 Vol.17 No.5
수도권에 있는 4개 도로터널을 선정해 오전 7시부터 오전 9시까지 미세먼지와 벤젠을 측정한 결과 PM10은 $111{\sim}268{\mu}g/m^3$으로 연간 대기환경기준치인 $50{\mu}g/m^3$을 2~5배 이상 초과하였고 PM2.5는 $35{\sim}65{\mu}g/m^3$으로 대기환경기준치인 $25{\mu}g/m^3$을 1.5배~2.5배 초과 하였다. 벤젠의 경우 300~500 ppb로 나타나 대기환경기준치인 1.5 ppb의 200~330배 초과하였다. 국내 장대터널에서 4개월 연속 측정한 결과 PM10의 경우 $30{\sim}400{\mu}g/m^3$으로 나타났고 Bag filter를 이용한 PM10의 제거효율은 97% 이상으로 나타나 향후 터널 내 대기질 개선에 기여할 것으로 판단된다. 벤젠의 경우 250~350 ppb로 측정되었다. Air quality was monitored in four roadway tunnels located near Seoul metropolitan area from 7:00AM to 9:00AM. PM10 concentrations range $111{\sim}268{\mu}g/m^3$, which are 2~5 times higher than annual standard $50{\mu}g/m^3$, and PM2.5 concentrations range $35{\sim}65{\mu}g/m^3$, which are 1.5~2.5 times higher than annual standard $25{\mu}g/m^3$. Benzene concentrations range 300~500 ppb, which are 200~300 times higher than 1.5 ppb which is air quality standard. Four-month long term air quality monitoring and test results in one of long tunnels show that PM10 range $30{\sim}400{\mu}g/m^3$ and over 97% of them can be removed by bag filter, effectively. Finally, benzene concentrations range 250~350 ppb.
건강한 축산물 생산으로 가는 길 - 친환경축산의 필요성과 대책
김범석,Kim, Beom-Seok 대한양계협회 2014 월간 양계 Vol.46 No.5
본고에서는 국내 친환경축산에 대해 정의를 먼저내리고, 국내 친환경축산의 현황을 살펴보고자 한다. 그리고 국내 친환경축산의 문제점 및 개선방안을 제시하여 앞으로 국내 친환경이 나아가야 하는 방향을 나타내고자 한다.