침술에서 초음파의 역할

박기영,Park, Gi-Young 대한정형외과초음파학회 2009 대한정형외과 초음파학회지 Vol.2 No.2

침술은 중국에서 3,000년 이상의 기원을 가진 가장 대중적인 보완대체의학 치료 방법으로 전세계적에서 널리 시행되고 있다. 초음파는 교육과 연구목적, 신경과 늑막과 같은 위험한 구조 주위 경혈에 침술을 시행할 때 도움이 된다. 또한 초음파는 조직에서 침 수기의 생 기계적 효과를 평가하는 데 이상적인 영상 검사로 조직 형태와 생 기계적 정보의 영상을 제공하는 특징적 장점을 가지고 있다. 탄성영상은 내부 혹은 외부에서 발생하는 기계적 자극에 의한 조직의 기계적 성질 혹은 반응을 정량화 할 수 있다. 그러므로 초음파와 탄성영상의 결합은 침술에 의한 인체 결합조직 구조의 동적변화를 정량적으로 평가할 수 있다. Acupuncture is a treatment method that originated more than 3,000 years ago in China and is practiced in most of the world. Acupuncture became the most popular complementary and alternative medicine modality. Ultrasound is useful for research and educational purposes, visualizing needle insertion at acupuncture points, especially next to vulnerable structures such as nerves or the pleura. Additionally, ultrasound is an ideal imaging method for evaluation the biomechanical effects of needle manipulation on tissue and has the distinctive advantage of yielding both images of tissue morphology and biomechanical information. Elastography take aim at quantifying a mechanical response or the mechanical property of tissues from a mechanical stimulus, generated internally or externally. Therefore, the combination of ultrasound and elastography analyses allows quantitative assessment of dynamic changes in the structure of human connective tissue.

교섭창구단일화 제도의 위헌성에 관한 연구

박기영(Park, Gi Young) 전북대학교 법학연구소 2015 法學硏究 Vol.46 No.-

2010년 1월 1일 노동조합 및 노동관계조정법의 개정으로 2011년 7월 1일부터 사업(장)단위에서 2개 이상의 노동조합을 자유롭게 설립하거나 가입할 수 있는 복수노조가 허용되었고, 교섭창구단일화제도가 시행되면서 헌법상 기본권에 해당하는 단체교섭권을 침해하여 위헌이라는 논란은 헌법재판소의 재판관 전원일치 합헌결정으로 일단락되었다. 하지만, 우리 규범체계상 헌법상 기본권인 단체교섭권에 대해 협약체결권이 사용자의 동의가 있는 경우를 제외하고는 실질적으로 부정된다는 점, 그 결과 교섭창구단일화 강제 조항은 교섭대표노동조합에서 탈락하거나 배제된 소수 노동조합의 단체교섭권 및 협약체 결권을 본질적으로 침해하는 것이다. 결론적으로 현행법상 교섭창구단일화제도가 헌법상의 단체교섭권에 대한 본질적 침해가 발생되지 않아야 한다는 점, 다양한 노동조합의 체계를 간과하지 않고 고려해야 한다는 점, 예상되는 분쟁소지를 가능한 줄여야 한다는 점 등을 고려한다면 합리적 해석기준을 제시하여 현장의 혼란을 최소화하기 위한 고민과 노력을 통하여 노조법 개정에 대한 논의가 필요하다고 생각한다. From July 2011 from the Trade Union and Labor Relations Adjustment Act it was implemented multiple unions and the single bargaining channel the meantime been stopped. But, The current Trade Union and Labor Relations Adjustment Act on the collective the single bargaining channel was unified by the infringement of the right to collective bargaining institutions from academia and labor since before the introduction of unconstitutional because the claim has been filed. In addition, despite the constitutional decision of the Constitutional Court on the unconstitutionality of the single bargaining channel system itself is still controversial is not an end. Whether with respect to the unconstitutionality of the unified In bargaining counter Islands Constitution Article 37, paragraph 2 shall examine again.

통신제품 품질정보관리시스팀 개발

박기영(Park Gi Young),차용주(Tcha Yong Joo),봉성종(Bong Seong Jong),임용배(Lim Yong Bae) 한국통신학회 1994 한국통신학회 학술대회논문집 Vol.1994 No.11

직접분사식 바이오에탄올-가솔린 혼합연료의 분무 및 희박연소 특성에 관한 실험적 연구

박기영 ( Gi Young Park ),강석호 ( Seok Ho Kang ),김인구 ( In Gu Kim ),임철수 ( Cheol Soo Lim ),김재만 ( Jae Man Kim ),조용석 ( Yong Seok Cho ),이성욱 ( Seong Wock Lee ) 한국분무공학회 2014 한국액체미립화학회지 Vol.19 No.3

As a demand for an automobile increases, air pollution and a problem of the energy resources come to the fore in the world. Consequently, governments of every country established ordinances for green-house gas reduction and improvement of air pollution problem. Especially, as international oil price increases, engine using clean energy are being developed competitively with alternative transportation energy sources development policy as the center. Bio ethanol, one of the renewable energy produced from biomass, gained spotlight for transportation energy sources. Studies are in progress to improve fuel supply methods and combustion methods which are key features, one of the engine technologies. DI(Direct Injection), which can reduce fuel consumption rate by injecting fuel directly into the cylinder, is being studied for Green-house gas reduction and fuel economy enhancement at SI(Spark Ignition). GDI(Galoine Direct Injection) has an advantage to meet the regulations for fuel efficiency and CO2 emissions. However it produces increased number of ultrafine particles, that yet received attention in the existing port-injection system, and NOX. As fuel is injected into the cylinder with high-pressure, a proper injection strategy is required by characteristics of a fuel. Especially, when alcohol type fuel is considered. In this study, we tried to get a base data bio-ethanol mixture in GDI, and combustion for optimization. We set fuel mixture rate and fuel injection pressure as parameters and took a picture with a high speed camera after gasoline-ethanol mixture fuel was injected into a constant volume combustion chamber. We figured out spraying characteristic according to parameters. Also, we determine combustion characteristics by measuring emissions and analyzing combustion.

먹이종류에 따른 Rotifer , Brachionus rotundiformis 의 고밀도 배양

박흠기(Huem Gi Park),김성구(Sung Koo Kim),박기영(Kie Young Park),박영제(Young Je Park) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.3

The experiment was carried out in a 10ℓ vessel in order to evaluate the growth and nutritional quality of rotifer, Brachionus rotundiformis fed by different diets(Freshwater Chlorella, Marine Chlorella and ω-yeast) for the high density cultivation. The maximum, densities for the rotifer fed on the marine Chlorella, freshwater Chlorella and ω-yeast were 10,900∼12,400, 9,190∼10,600 and 2,390∼2,750 inds./㎖, respectively. Therefore the maximum densities for the rotifer fed on the marine Chlorella and freshwater Chlorella were highter than that for rotifer fed rotifer fed on the ω-yeast. The essential n-3 highly unsaturated fatty acid in rotifer fed on the marine Chlorella was 8.71% which was slightly lower than that in rotifer fed on the ω-yeast, 9.14%, while it was highter than that in the rotifer fed on freshwater Chlorella, 4.45%. This result indicated that marine Chlorella could be appropriate diet for the high density cultivation of rotifer.

자동차용 강판의 겹치기 CO₂ 레이저 용접에서 발생되는 플라즈마 특성에 관한 연구

남기중(Gi Jung Nam),박기영(Ki Young Park),이경돈(Kyoung Don Lee) 한국레이저가공학회 2002 한국레이저가공학회지 Vol.5 No.1

비상발전기용 PM/NO_X 저감장치의 유동특성 연구

방효원,박기영,이성욱,Bang, Hyo-Won,Park, Gi-Young,Lee, Seong-Wock 한국분무공학회 2021 한국액체미립화학회지 Vol.26 No.4

Emergency generators normally use diesel engines. The generators need to conduct weekly no-load operation inspections to ensure stable performance at emergency situations. In particular, the generators with large diesel engines mainly use rectangle type filter substrates. In order to minimize hazardous emissions generated by generators, optimizing the reduction efficiency through CFD analysis of flow characteristics of PM/NO_X reduction system is important. In this study, we analyzed internal flow by CFD, which is difficult to confirm by experimental method. The main factors in our numerical study are the changes of flow uniformity and back pressure. Therefore, changes in flow characteristics were studied according to urea injector locations, selective catalyst reduction (SCR) diffuser angle, and filter porosity.

먹이종류에 따른 Rotifer , Brachionus calyciflorus Pallas 의 내구란 생산 및 부화율

박흠기(Huem Gi Park),권오남(O Nam Kwon),박기영(Kie Young Park),김광양(Kwang Yang Kim) 한국수산과학회 2000 한국수산과학회지 Vol.33 No.3

This study was performed to investigate production and hatching rate of the resting egg of freshwater rotifer, Brachionus calyciflorus fed the 5 different diets (ESP, freshwater Chlorella, baker`s yeast, the mixture of 70% ESP and 30% freshwater Chlorella, and the mixture of 30% baker`s yeast and 70% freshwater Chlorella). The highest productions of resting eggs were 123.3 eggs/㎖ and 126.7 eggs/㎖ in the mixture of 70% ESP and 30% freshwater Chlorella, and the mixture of 30% baker`s yeast and 30% and 70% freshwater Chlorella, respectively, which were significantly better than ESP, freshwater Chlorella or baker`s yeast alone (P<0.05). Hatching rate of the resting eggs from rotifer fed the mixture of 70% ESP and 30% freshwater Chlorella was the highest, 71.9% although this value was not significantly different compared with the mixture of 30% baker`s yeast and 70% freshwater Chlorella, and freshwater Chlorella (P<0.05). The results showed that the mixture of baker`s yeast or ESP with the freshwater Chlorella seemed to be the best feeding regime for the production and hatching rate of resting egg of freshwater rotifer.

노후된 SCR 장치의 N₂O 배출 특성 연구

송호영(Ho Young Song),김기호(Ki Ho Kim),이정민(Joung Min Lee),박기영(Gi Young Park),이성욱(Seang Wock Lee) 대한기계학회 2018 大韓機械學會論文集B Vol.42 No.10

경유 자동차의 배출가스 규제는 EURO 5에서 EURO 6로 강화되었다. EURO 6 규제 물질 중 질소산화물(NOx) 배출허용기준을 만족시키기 위해 Urea-SCR 장치가 장착되고 있다. SCR 시스템은 NOx 저감효율은 우수하지만 노후화에 따른 NH3 slip 등 문제점을 안고 있다. 본 연구에서는 SCR 장치 노후화문제점중 하나인 N₂O 배출특성을 분석하였다. ESC 및 ETC test cycle에서 SCR 장치가 노후화 될수록 N₂O의 배출량이 증가하는 경향을 보였다. 특히, NH3 slip이 많은 고온 조건에서 N₂O의 배출량이 많았다. 이는 열화에 의해 SCR 촉매의 N₂O 선택성이 증가하고 SCR 촉매에서 환원반응하지 않은 NH₃가 AOC 촉매에서 산화반응한 결과로 보인다. Selective Catalytic Reduction(SCR) devices, widely known for the greatest NOx conversion performance, have being equipped to diesel engines to satisfy NOx limits of EURO 6. Although NOx reduction efficiency of SCR is superior, there are some problems related to ageing. In this study, N₂O was investigated when SCR devices were aged. N₂O increased with ageing on ESC and ETC test cycle. In particular, N₂O generation took place at a greater rate when exhaust gas temperature was high and there were a number of NH₃ slips. This phenomenon resulted from higher selectivity of N₂O on SCR catalysts and the oxidation reaction of NH₃, which did not undergo the reduction reaction, on Ammonia Oxidation Catalysts(AOC) due to ageing.

가시배새우(Lebbeus groenlandicus)의 유생 단계 에너지수지

김원기 ( Won Gi Kim ),권오남 ( O Nam Kwon ),박기영 ( Kie Young Park ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.6

Spiny lebbeid shrimp Lebbeus groenlandicus larvae were reared in the laboratory to estimate the energy budget from the zoeal to the post-larval stage. Energy expended by larvae on growth and respiration was determined from values for feeding, growth,molting, and metabolism. We calculated that 16.22 J were used for growth throughout all larval stages. Energy loss during molting was estimated as 1.03 J, and energy used for respiration was estimated as 1.31 J. Energy taken in by feeding was estimated as 77.16 J, while the sum of energies expended in excretion and egestion was 58.61 J. Larvae were estimated to assimilate 24.6%of ingested food as energy and to use ~85% of the assimilated energy for somatic growth. Gross growth efficiency (K1) and net growth efficiency (K2) were shown to be ~22% and 93%, respectively. Maintenance costs of respiration were estimated as ~9.7%of assimilated energy.