전압형 PWM 인버터 제어 고속 엘리베이터 시스템

김운수(WOON-SOO KIM),장철호(CHEOL-HO JANG),이제필(JEA-PIL LEE),김정하(JUNG-HA KIM),엄용기(YONG-GI EOM),송승봉(SEUNG-BONG SONG) 대한전기학회 1992 대한전기학회 학술대회 논문집 Vol.1992 No.7

공무원의 재난관리인식에 대한 실증적 연구

김승봉(Seung-bong Kim),정용태(Yongtai Chung) 한국방재안전학회 2023 한국방재안전학회 논문집 Vol.16 No.4

본 연구는 전라남도 22개 시군의 재난관련 부서에 근무하는 공무원들의 재난안전관리업무에 대한 개인역량, 부서역량, 조직환경 및 재난교육에 대한 인식수준을 파악하기 위해 실시한 설문조사 결과를 토대로 실증적 분석을 실시하였다. 성별에 따른 개인역량, 조직 환경에 대해서는 남자가 여자보다 더 긍정적인 인식을 가진 것으로 나타났으며, 재난교육에 대해서는 여자가 남자보다 더 긍정적인 인식을 가진 것으로 나타났다. 부서역량에 대해서는 남자와 여자의 긍정적인 인식이 같은 것으로 나타났다. 개인적 특성에 따른 개인 역량, 조직환경, 부서역량 및 재난교육에 대한 응답자들이 대체로 긍정적인 인식을 가진 것으로 나타났다. This study conducted an empirical analysis based on the results of a survey conducted to determine the level of awareness of disaster safety management work of public officials working in disaster-related departments in 22 cities and counties in Jeollanam-do. Men were found to have more positive perceptions of individual competencies and organizational environments according to gender, and women were found to have more positive perceptions of disaster education than men. It was found that men and women had the same positive perception of departmental competency. Respondents to individual competency, organizational environment, departmental competency, and disaster education according to individual characteristic factors generally had positive perceptions.

불모지 내 활용 가능한 자생식물의 발아특성 연구

김동학 ( Kim¸ Dong-hak ),김상준 ( Kim¸ Sang-jun ),유승봉 ( Yu¸ Seung-bong ),박기쁨 ( Bak¸ Gippeum ) 한국환경복원기술학회 2021 한국환경복원기술학회지 Vol.24 No.4

This study suggested suitable soil textures that is proper to propagate native plants to manage and restore barren land in DMZ. Germination tests were conducted for 16 native herbaceous plants growing in the DMZ border area in accordance with FAO-BI (Biodiversity International) standards, and the germination rate and T₅₀ in vitro were investigated. In order to examine the germination characteristics according to the soil textures, we used gravel, bed and mixed soil and investigated the germination characteristics under ordinary room temperature conditions in the greenhouse. As a result, it was observed that the germination rate in the greenhouse was significantly decreased compared to the germination rate in vitro of the species advertised due to soil textures. T₅₀ between the in vitro and each soil texture showed significant differences whereas T₅₀ between soil textures alone did not in all species advertised. The germination rate in vitro of Aster koraiensis, Dendranthema zawadskii var. latilobum, Hosta clausa , and Hosta minor there was no significant difference compared to ordinary room temperature conditions. In addition, as the germination rate is demonstrated more than 70%, which is relatively higher than other species advertised, it is considered to have strong environmentally adaptable. On the other hand, considering that the 6 species of Leontopodium coreanum, Plantago major , Potentilla chinensis, Sedum kamtschaticum, Sedum latiovalifolium, and Veronica kiusiana demonstrated less than 50% of germination rate in vitro, it is expected to be difficult to propagate without pre-treatment. In order to use these 6 species as restoration material plants, it needs to be considered to pre-treat to improve germination rate, or to enhance the vitality of seeds by improving the seed gathering period and storage method.

태권도 수련 초등학생의 신체적 자아개념이 자기효능감에 미치는 영향

김승봉 ( Seung Bong Kim ) 대한무도학회 2013 대한무도학회지 Vol.15 No.3

본 연구는 초등학생의 태권도 수련활동이 신체적 자아개념과 자기효능감에 어떠한 영향을 미치는지 탐색하는데 목적이 있다. 연구대상자는 전남 S시에 소재한 태권도장에서 수련중인 초등학생 367명(남자 269명, 여자 98명)을 분석대상으로 하였다. 성별, 학년, 수련기간, 수련수준, 성적, 친한 친구 수에 따라 신체적 자아개념과 자기효능감의 차이를 비교하였으며, 이를 근거로 신체적 자아개념과 자기효능감의 상관관계를 분석한 다음 신체적 자아개념이 자기효능감에 미치는 영향을 분석하였다. 연구결과를 살펴보면 첫째, 친한 친구수가 5명 이상인 학생의 경우 신체적 자아개념과 자기효능감이 모두 유의하게 높았으며, 성별의 경우 남학생이 신체적 자아개념이 높았고, 수련기간이 3~4년 미만의 경우 자기효능감이 가장 높았다. 또한 성적은 상위집단의 경우 자기효능감이 높게 나타났다. 둘째, 신체적 자아개념과 자기효능감 간에 의미 있는 정적 상관이 있었다. 셋째, 신체적 자아개념이 자기효능감에 영향을 미치는 정도는 13%를 차지하여 유의한 영향을 미치는 것으로 나타났고, 신체적 자아개념 하위요인 중 자기효능감에 영향을 미치는 변인은 지구력, 근력으로 나타났다. This study has the objective to find how physical self-concept and Taekwondo training of elementary school students affect self-efficacy. The subjects for this study were total 367 elementary school students (269 boys, 98 girls) who were training at Taekwondo academy in Jeonnam S city. The correlation of physical self-concept and self-efficacy has been compared. The impact of physical self-concept on self-efficacy has been analyzed. From the result of study, first, students who have more than 5 close friends showed significantly high physical self-concept and self-efficacy. In terms of gender, the physical self-concept of boy students showed higher level. Under the condition less than 3 to 4 years of training period, the highest self-efficacy appeared. In addition, in terms of academic grades, self-efficacy of the above group showed high self-efficacy. Secondly, there was significantly positive relation between physical self-concept and self-efficacy. Third, the degree of physical self-concept`s impact on self efficacy occupies 13%, which was very significant. From this study, variables which affect self-efficacy among sub-factors of physical self-concept turned out muscular strength and endurance.

운동재활 자원봉사활동 참여자의 심층적 분석을 통한 인성함양 요인 탐색

김옥주(Kim, Ok-Ju),이태형(Lee, Tae-Hyeong),박은석(Park, Eun-Seok),김승봉(Kim, Seung-Bong),김공(Kim, Kong) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.2

This study is for in-depth analysis(targeting volunteer worker) in order to understand which factor affects volunteer worker for their cultivation of character when rehabilitation exercise is applied into a volunteer exercise program. And the result is as below. It was found that students who participated in volunteer activity for rehabilitation exercise have improved their character in ‘personnel aspect’ and ‘social aspect’. More specifically, for ‘personnel aspect’, formation of positive mind-set, formation of self-identity, practicing potential leadership, enhancement of self-respect and confidence, establishment of proper values and reinforcement of sense of responsibility were analyzed. Meanwhile, for ‘social aspect’, a behavior respecting the elderly, thoughtful mind-set, sense of social solidarity, formation of relationship with others and ability to solve problem in reasonable way were analyzed. Which means, for character cultivation factor among those who participated in rehabilitation exercise, each factor included in ‘personnel aspect’ and ‘social aspect’ was analyzed for understanding on character cultivation of university students who participated in the activity. And it was found that correlation between ‘personnel aspect’ and ‘social aspect’ exists in the process of character cultivation.

국내 말산업 육성 5개년 종합계획 추진 정책 및 기대성과 동향 탐색

김옥주(Ok-Ju Kim),김승봉(Seung-Bong Kim),김공(Kong Kim) 한국발육발달학회 2018 한국발육발달학회지 Vol.26 No.4

This paper examines the propulsion policy, expectation, and tendency exploration of comprehensive plan for horse industry promotion to make a realistic policy of horse industry worthy of development as a new income resources for farming and fishing communities in Korea. So, this paper investigated the development tendency of horse industry and explored the propulsion policy and expected outcome of comprehensive plan for horse industry promotion by year. As a result, this paper found that at the second year, of comprehensive five-year plan for horse industry promotion, the aim and expected effect figures were adjusted concretely from those of the first year. As the years go by, new goals and expected effect items were created. In many aspects, a great many efforts were deployed to make comprehensive plans. Especially, a lot of change were tried with the purpose of transferring the regional focus of horse industry from farming and fishing communities to urban communities, of nurturing talented youths, and of activating the distribution of the horse industry over various classes including neglected people.

펌핑시스템 최적화 방안 연구

최승봉(Seung-Bong Choi),남진극(Jin-Geuk Nam),김동진(Dong-Jin Kim),강경은(Kyong-Un Kang),김종정(Jong-Jung Kim),이상배(Sang-Bae Lee),박정우(Jung-Woo Park) 대한전기학회 2015 대한전기학회 학술대회 논문집 Vol.2015 No.7

수면무호흡증과 상기도저항 증후군에서 Nasal Airflow의 압력측정 및 상기도 압력변화에 대한 연구

김후원,홍승봉,Kim, Hoo-Won,Hong, Seung-Bong 대한수면의학회 2000 수면·정신생리 Vol.7 No.1

수면 중 나타나는 호흡장애를 좀 더 정확하게 측정하기 위해 고안된 비강 공기압 측정기의 민감도를 온도감지 센서와 비교하기 위해 30명의 수면무호흡 증후군 환자와 6명의 상기도 저항증후군 환자에서 저호흡-무호흡 지수와 각성지수를 비교하였다. 그리고 상기도 저항 증후군에서 각성을 일으키는 상기도 압력변화에 대해 알아보기 위하여 온도감지 센서에서 발견되지 않은 저호흡-무호흡과 관련된 각성에서 상기도의 압력을 측정하였다. 비강 공기압 측정기가 기존의 온도감지 센서보다 훨씬 더 민감한 방법임을 알 수 있었다(p<0.05). 비강 공기압 측정기로 검사하여 저호흡-무호흡지수가 평균 41%가 증가되었고 호흡장애가 심하지 않은 경증의 수면무호흡 증후군이나 상기도 저항 증후군에서 더 많이 증가하였다. 비강 공기압 측정기로 검사한 저호흡-무호흡지수를 비교하면 상기도 저항 증후군이 수면무호흡 증후군의 가장 경미한 형태라는 것을 알 수 있었다. 상기도 저항 증후군에서 나타나는 각성에서 상기도의 압력 변화는 일정한 범위에서 나타나지 않았고 다양한 압력 분포를 보였으며 수면 중 호흡장애의 정도가 심해질수록 압력변화의 폭이 더 커지는 양상을 보였다. 비강 공기압 측정기가 기존의 온도감지 센서보다 더 민감하지만 아직까지 해결해야 할 문제가 일부 남아 있어서 온도 감지 센서를 완전히 대체하기는 어려울 것으로 보인다. 그러나 경증의 수면무호흡 증후군이나 상기도 저항 증후군을 진단하는 데에는 많은 도움이 될 것이다. 특히 상기도 저항 증후군의 진단에 기존에는 상기도 압력 측정이 필요하다고 하였으나 비강 공기압 측정기를 이용하면 불편한 상기도 압력 측정은 필요 없을 것으로 생각된다. Objectives: The sensitivity and accuracy of thermistor airflow signal has been debated. The purposes of this study were to compare apnea-hypopnea index(AHI) detected from a conventional thermistor signal and a nasal pressure transducer of airflow(NPT), to evaluate the value of NPT for the diagnosis of upper airway resistance syndrome(UARS), and to measure airway pressure fluctuations which produced respiratory arousals in UARS by naso-oro-esophageal manometer catheter. The subjects were 30 patients with obstructive sleep apnea syndrome [mild(5<AHI<20), 10; moderate(20<AHI<40), 10; severe(AHI>40), 10), and 6 UARS patients. Airway resistance arousal in this study was defined as arousals which were not associated with apnea or hypopnea of thermistor signal, but showed significant decrease of nasal airflow pressure just before arousal and a prompt recovery of nasal airflow pressure after arousal. The airway pressure fluctuations were measured during 260 airway resistance arousals observed in 10 patients with OSAS, 2 with UARS. Results: Mean AHIs of patients with OSAS were 33.4 by thermistor and 48.4 by NPT. The AHIs of mild, moderate and severe OSAS groups were 10.2, 32.1, 65.4 respectively by thermistor and 23.1, 45.9, 76.4 by NPT. The mean AHI of patients with UARS was 3.2 by thermistor and 10.8 by NPT. The mean AHI of patients with nonspecific arousals was 2.7 by thermistor and 4.4 by NPT. The mean airway pressure changes during respiratory arousals of different groups were $8.7\;cmH_2O$ in mild OSAS, $11.4\;cmH_2O$ in moderate OSAS, $24.7\;cmH_2O$ in severe OSAS and $6.6\;cmH_2O$ in UARS. Conclusion: The nasal pressure transducer of airflow was more sensitive and accurate for assessing respiratory disturbances of patients with OSAS and was extremely helpful for the diagnosis of UARS without esophageal pressure monitoring. From the results, we would like to propose carefully the NPT diagnostic criteria for sleep disordered breathing as follows: NPT-AHI 5-15 $\rightarrow$ UARS, 15-35 $\rightarrow$ mild OSAS, 35-55 $\rightarrow$ moderate OSAS and >55 $\rightarrow$ severe OSAS.

생산용량과 수요의 특성이 주 재고위치 선정에 미치는 영향에 관한 연구 - LNG 선박용 보온/보냉 판넬 제조 산업을 중심으로 -

김주년 ( Junyun Kim ),민정웅 ( Jung Ung Min ),백승봉 ( Seungbong Baek ) 한국로지스틱스학회 2017 로지스틱스연구 Vol.25 No.1

본 연구에서는 LNG 선박용 보온/보냉 판넬 공급업의 프로젝트 산업 특성을 반영하여, 생산용량과 수요 특성을 고려한 주 재고위치 선정 문제를 다루고 있다. 시스템 다이내믹스 이론을 활용하여 이들 선정요인의 변화에 따른 주 재고위치의 변화를 파악하고, 이러한 변화가 재고비용과 총 비용에 미치는 영향을 분석하였다. 시뮬레이션 결과 분석과 민감도 분석을 통해 3개 연속 공정의 생산용량변화와 일일 수요의 변동률의 변화가 주 재고위치와 총비용에 대해 미치는 영향 및 요인 별 총비용에 대한 영향의 정도를 파악할 수 있었다. 본 연구를 통해 조선업 공급업체의 효율적 주 재고위치 선정으로 재고비용 절감을 통한 원가 경쟁력 강화에 기여할 것으로 기대한다. This study dealt with the selection of decoupling point using capacity and demand characteristic of the suppliers that manufacture the insulation panel for the shipbuilders. This study analyzed how the location of the decoupling point, the inventory cost and total cost change when the selection factors of decoupling point change. The result of simulation and the result of sensitivity analysis found out how selection factors affect the location of the decoupling point, the inventory cost and total cos and which factor is the most influential. This study would help the suppliers in the shipbuilding industry to increase their cost-competitiveness through decreasing inventory cost with the right decoupling point.

냉매 유로 배열에 따른 슬릿휜-관 열교환기의 증발특성에 관한 실험적 연구

문승봉(Seung-Bong Moon),김창덕(Chang-Duk Kim),장경근(Kyoung-Keun Jang),남임우(Leem-Woo Nam),전창덕(Chang-Duk Jeon),이진호(Jinho Lee) 대한설비공학회 2000 대한설비공학회 학술발표대회논문집 Vol.2000 No.-