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소음 특수건강진단 1차검사의 민감도와 특이도에 미치는 일과성 역치 상승과 주변환경 소음의 영향
원종욱,방문규,송중호,정선아,송재석,노재훈 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2
Object : This study was performed to increase the sensitivity and specificity for screening the examinee of second hearing test. Methods : Study subjects were 219 workers who exposed more than average 80dB. They were taken the hearing test two times, before noose exposure and at 1 hour to 4 hours after worksite noise exposure. To investigate the ambient noise workers who were taken the hearing test in the test room which ambient noise was less than 45dB were classified Group I and the others were classified Group II . To calculate the sensitivity and specificity we made it gold standard whether worker had noise induced hearing loss. Results : Difference of hearing loss between before and after noise exposure for left and right ear was 11.4 dB and 11.7 dB respectively at 500 Hz, 8.7 dB and 9.6 dB at 1,000 Hz, 6.3 dB and 6.9 dB at 2,000 Hz and 6.9 dB and 7.4 dB at 4,000 Hz In Group I. That for left ear and right ear was 5.8 dB and 4.9 dB at 500 Hz respectively, 5.4 dB and 6.4 dB at 1,000 Hz, 6.3 dB and 5.3 dB at 2,000 Hz, and 5.5 dB and 5.8 dB at 4,000 Hz in Group II. The sensitivity was 100 in both Groups and the specificity was increased to 58.3 and 71.8 in Group I and Group II respectively until 10 dB was deducted from hearing level at 1,000 Hz and 4,000 Hz. Conclusion : When the screening hearing test was performed at worksite, we might deduct 10 dB from measured hearing level to increase the specificity without reduction of sensitivity.
( Hye Jung Chang ),( Jae Hoon Lee ),( Young Rok Do ),( Sung Hwa Bae ),( Jung Lim Lee ),( Seung Hyun Nam ),( Sung Soo Yoon ),( Soo Mee Bang1 ) 대한내과학회 2011 The Korean Journal of Internal Medicine Vol.26 No.4
Background/Aims: The clinical efficacy and safety of a three-drug combination of melphalan, prednisone, and thalidomide were assessed in patients with multiple myeloma who were not candidates for high-dose therapy as a firstline treatment. Because the side effects of thalidomide at a dose of ≥ 100 mg daily can be a barrier to effective treatment for these patients, we evaluated the efficacy and safety of a reduced dose of thalidomide, 50 mg, for non-transplant candidates. Methods: Twenty-one patients were treated in 4-week cycles, receiving 4 mg/m2 melphalan and 40 mg/m2 prednisone on days 1-7 and 50 mg thalidomide daily. The primary efficacy outcome was the overall response rate. Aspirin (100 mg daily) was also provided as prophylactic treatment for thromboembolism. Results: The overall response rate was 57.1%; a complete response was seen in 23.8% of patients, a partial response in 33.3%, and stable disease in 9.5%. After a median follow-up time of 16.1 months, the median time to progression was 11.4 months (95% confidence interval, 2.1 to 20.6); the median overall survival was not reached. Grades 3 and 4 adverse events included infection (10%), peripheral neuropathy (5%), diarrhea (5%), thrombosis (10%), and loss of consciousness (10%). Two patients discontinued treatment due to loss of consciousness and neuropathy. Conclusions: Low-dose thalidomide (50 mg) plus melphalan and prednisone is an effective combination drug therapy option for newly diagnosed myeloma patients who are ineligible for high-dose chemotherapy.
임영도,설재훈,한창훈,김승철,박종오,이준탁,방석원 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1
This paper describes an intelligent cruise control system for automobile. With the remarkable numericalincrease of automobiles on the roal, the optimized traffic flow control using the cruise control is one of the very important traffic problems to overcome the limitation of an existing road capacity. Based onthis idea that minimize the fuel cost and teh air pollution, and accept a driver's needs for driving, we have developed an intelligent cruise control system for vehicle. This proposed intelligent fuzzy cruise controller was successfully implemented using the fuzzy algorithm, the i80c196 μ-controller board and the throttle valve actuator. The field test results on an linear road was introduced.
여성노인의 저항운동 시 세트구성 방법의 차이가 Myokine에 미치는 영향
김명수 ( Kim¸ Myung-soo ),이승환 ( Lee¸ Sung-hwan ),민병남 ( Min¸ Byung-nam ),김재훈 ( Kim¸ Jae-hoon1 ),방현석 ( Bang¸ Hyun-seok ),김성희 ( Kim¸ Sung-hee ) 한국융합과학회(구 한국시큐리티융합경영학회) 2020 한국융합과학회지 Vol.9 No.4
연구목적: 본 연구는 여성노인을 대상으로 저항운동 시 사용되는 set구성 방법에 중 ascending set, descending set, drop set를 각각 적용시켜 Myokine의 변화를 알아보고자 하였다. 연구방법: 연구대상은 노인복지시설을 이용하고 있는 만 65-72세 사이의 여성노인 32명을 대상으로 ascending set, 8명, descending set 8명, drop set 8명, control group 8명으로 구분하였다. 자료처리는 반복측정에 의한 이원변량분석(two-way ANOVA with repeated measure)을 사용하였으며, 유의도는 .05로 하였다. 결론: 운동프로그램은 12주간 주 3회 실시하였으며, 신체구성과 IL-15, BDNF, VEGF, Irisin의 변화를 관찰하였다. 연구결과 신체구성의 체중, 체지방률, 제지방량 모두 유의한 차이가 없었다. IL-15와 BDNF는 운동 전·후의 비교결과 Descending set와 Drop set에서 운동 후 유의하게 증가하였고, 집단 간의 차이에서 Descending set와 Drop set 집단이 대조집단에 비하여 높게 나타났다. VEGF는 운동 전·후의 비교결과 Descending set와 Drop set 집단이 유의하게 증가하였으며, 집단 간의 차이에서 Descending set와 Drop set가 Ascending set와 control group 보다 높게 나타났다. Irisin은 집단 간 차이는 없었지만 Ascending, Descending, Drop set집단에서 운동 전에 비하여 운동 후 유의한 차이로 증가하였다.. Purpose: The purpose of this study is to identify the change of Myokine by applying ascending set, descending set, and drop set which are set composition used during elderly women’s resistance training. Method: 32 participants aged 65 to 72 who were users of welfare facilities for the aged were divided into 4 groups. They were ascending set group of 8, descending set group of 8, drop set group of 8, and control group of 8. The training program was conducted 3 times a week for 12 weeks and the change of body composition, IL-15(interleukin-15), BDNF(brain derived neurotrophic factor), VEGF(Vascular endothelial growth factor) and Irisin was observed. Two-way ANOVA with repeated measure was used for data processing. Result: The result of this study is as follows. Weight, %fat, and LBM(lean body mass) without fat showed no significant change. IL-15 and BDNF increased significantly after training in Descending set group(p<.05; p<.01)and Drop set group(p<.01; p<.05). VEGF significantly increased in descending set group(p<.01) and drop set group(p<.05). Among groups, VEGF was higher in descending set and drop set groups than ascending set and control groups. Irisin showed no difference between groups, but it showed significant increase after training in ascending(p<.05), descending(p<.05), and drop set groups(p<.05).
Bang, Jae-Hoon,Choi, Soon-Woo,Noh, Jae-Woo,Lim, Joo-Young,Kim, Dong-Hyun,Kim, Dae-Oh,Ahn, Bierng-Chearl Hindawi Limited 2016 International journal of antennas and propagation Vol.2016 No.-
<P>This paper presents a new dual circularly polarized feed that provides good axial ratio over wide angles and low cross-polarized radiation in backward direction. A circular waveguide open end is fed with two orthogonally polarized waves in phase quadrature by a pair of printed crossed dipoles and a compact connectorized quadrature hybrid coupler. The waveguide aperture is loaded with a dielectric cylinder to reduce the cross-polarization beyond 90 degrees off the boresight. The fabricated feed has, at 5.5 GHz, 6.33-dBic copolarized gain, 3-dB beamwidth of 106°, 10-dB beamwidth of 195°, 3-dB axial ratio beamwidth of 215°, maximum cross-polarized gain of −21.4 dBic, and 27-dB port isolation. The reflection coefficient of the feed is less than −10 dB at 4.99–6.09 GHz.</P>
Bang, Jae Hoon,Lee, Namgue,Mirzaei, Ali,Choi, Myung Sik,Na, Han Gil,Jin, Changhyun,Oum, Wansik,Shin, Seokyoon,Choi, Hyeong Su,Park, Hyunwoo,Choi, Yeonsik,Jeon, Hyeongtag,Kim, Hyoun Woo Elsevier 2019 CERAMICS INTERNATIONAL Vol.45 No.6
<P><B>Abstract</B></P> <P>We report the electrical and optical characteristics of SnO<SUB>2</SUB> thin films irradiated by microwaves (MWs) and grown using atomic layer deposition in a commercial MW oven operating at a frequency of 2.45 GHz. The properties of the MW-irradiated SnO<SUB>2</SUB> thin films were compared with those of the as-deposited SnO<SUB>2</SUB> thin films. After MW irradiation, the conductivity and transparency of the thin films were enhanced. In addition, the samples irradiated for 5 min showed optimal carrier concentration, Hall mobility, resistivity, and transmittance values of 1.5 × 10<SUP>20</SUP> cm<SUP>−3</SUP>, 4.6 cm<SUP>2</SUP>/V s, 8 × 10<SUP>−3</SUP> Ω cm, and 95.77%, respectively. The improved properties of the MW-irradiated samples were attributed mainly to the formation of an oxygen vacancy in the SnO<SUB>2</SUB> lattice during MW irradiation. Our results can be applied for the fabrication of pure SnO<SUB>2</SUB>-based transparent conductive oxides; these oxides are generally doped with other elements.</P>
Bang, Jae Hoon,Choi, Myung Sik,Mirzaei, Ali,Kwon, Yong Jung,Kim, Sang Sub,Kim, Tae Whan,Kim, Hyoun Woo Elsevier 2018 Sensors and actuators. B Chemical Vol.274 No.-
<P><B>Abstract</B></P> <P>We present a highly sensitive and selective NO<SUB>2</SUB> sensor based on Bi<SUB>2</SUB>O<SUB>3</SUB> branched SnO<SUB>2</SUB> nanowires (NWs). SnO<SUB>2</SUB> NWs were first synthesized by a vapor-liquid-solid method, were coated with an Au layer, and Bi<SUB>2</SUB>O<SUB>3</SUB> branches were grown on their stems by the same procedure used for pure Bi powders. The fabricated sensor showed a high response (R<SUB>g</SUB>/R<SUB>a</SUB>) of 56.92 to 2 ppm of NO<SUB>2</SUB> gas at an optimal temperature. Furthermore, its response to other interfering gases such as ethanol, acetone, toluene, and benzene, was less than 1.55, which demonstrated excellent selectivity of the sensor towards NO<SUB>2</SUB> gas. For comparison and to better understand the sensing mechanism, a pristine SnO<SUB>2</SUB> NWs sensor was also tested. The superior sensing properties of the branched NW sensor relative to the pristine sensor were mainly attributed to the high surface area of the sensor resulting from Bi<SUB>2</SUB>O<SUB>3</SUB> branching, as well as the formation of homo-and heterojunctions (Bi<SUB>2</SUB>O<SUB>3</SUB>-SnO<SUB>2</SUB>). In addition, several factors including the presence of Au contributed to the excellent selectivity to NO<SUB>2</SUB> gas. Based on the results obtained in this work, we believe that the present sensor with an easy fabrication method, along with its high sensitivity and selectivity towards NO<SUB>2</SUB>, can be used for the detection of NO<SUB>2</SUB> gas in real applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We presented a highly sensitive and selective NO<SUB>2</SUB> sensor based on Bi<SUB>2</SUB>O<SUB>3</SUB> branched SnO<SUB>2</SUB> nanowires. </LI> <LI> The sensor showed a high response (R<SUB>g</SUB>/R<SUB>a</SUB>) of 56.92 to 2 ppm of NO<SUB>2</SUB> gas </LI> <LI> The sensor demonstrated excellent selectivity towards NO<SUB>2</SUB> gas. </LI> <LI> We explored the sensing mechanisms, in regard to the selective sensing to NO<SUB>2</SUB> gas. </LI> </UL> </P>