制鐵原料輸送의 現況

郭泳基 한국해사문제연구소 1974 (月刊)海洋韓國 Vol.14 No.-

TOE 프레임워크를 활용한 RPA 도입 의도에 미치는 영향 요인 연구 - 중소기업 규모의 조절효과를 중심으로 -

곽영기,이원부 한국품질경영학회 2024 품질경영학회지 Vol.52 No.1

Purpose: By empirically analyzing factors that affect the intention to introduce RPA, we aim to increase understanding of RPA introduction in small and medium-sized businesses and contribute to establishing an effective introduction strategy. The aim is to improve the company’s productivity, reduce costs, and strengthen its competitiveness. It also provides policy recommendations for the introduction of RPA. Methods: A survey was conducted to examine whether the technical, organizational, and environmental factors of the TOE framework had an impact on the intention to adopt RPA. We also used stepwise regression analysis to determine whether firm size moderates this relationship. Results: Technical factors, organizational factors, and environmental factors were all found to have a significant impact on small and medium-sized enterprises’ intention to adopt RPA. It was confirmed that company size has a moderating effect affecting the intention to adopt RPA. In particular, customer pressure, relative advantage, competitive pressure, age, government support, and the perceived ease of use of RPA was a key determinant of its adoption by small and medium-sized enterprises. Conclusion: This suggests that small and medium-sized businesses should comprehensively consider technical, organizational, and environmental factors when introducing RPA. It is expected to increase understanding of RPA introduction in small and medium-sized businesses, contribute to establishing effective introduction strategies, and contribute to improving company productivity, reducing costs, and strengthening competitiveness.

목포권 중소형 조선업 육성에 대한 연구

곽영기,윤순동,박종환 木浦海洋大學校 1999 論文集 Vol.7 No.1

Mokpo area has natural advantages for ship building and good Infra-Structure such as railroad, harbor(construction of a new output), the west coast highwasy, Muan international airport nearby. This good Infra-Structure will enable Mokpo a nucleus city of the distribution industry in the Yellow sea rimland with the steady increasing trade with China and this will stimulate the shipping industry to leads to a demand for ships. To prepare for this need, the analysis of the international shipbuilding market conditions and the investigation of the present state of domestic and Mokpo area's shipbuilding industry are performed ahead of the futre growth plan of Mokpo area's shipbuilding industry. In this study, by examining the state of small and midium sized shipbuilding yards in Japan, the problems and the solutions of those in Korea is clearly found. Moreover, the problems are listed and th counterplans of ship production technique which the small and medium sized shipbuilding yards have in common in Korea and the manpower supply plan in Mokpo area are suggested. Under the aim of having small and medium sized shipbuiling yards which have the strenthened competitiveness and a sound base of the shipping and distribution industry in the near future, the action plans are proposed and the direction of the future growth study are presented.

친환경 유기농자재의 잿빛곰팡이병 병원균의 생장 억제 효과

곽영기(Young-Ki Kwak),김일섭(Il-Seop Kim),조명철(Myeong-Cheoul Cho),이성찬(Seong-Chan Lee),김수(Su Kim) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.2

친환경 유기농자재를 이용하여 잿빛곰팡이병균의 포자 발아, 균사생장 억제효과를 기내에서 조사하였다. 그 결과 잿빛곰팡이병의 균사생장 억제 효과는 Bacillus subtilis를 주성분으로 하는 제제가 100%의 억제효과를 보였으며, 그 외의 제제는 20% 이하의 범위에서 억제효과를 나타내었다. 포자발아 억제효과는 유기황 수화제 2종(‘BTB’, ‘황스타’)이 각각 97.7%, 92.3%으로 나타났다. 균사생장 억제와 포자 발아억제에 모두 효과를 보이는 제제는 없었다. 따라서 잿빛곰팡이병 방제를 위해서는 포자발아 억제를 위한 방제와 균사생장억제를 위한 제제를 각각 처리하여야 할 것으로 사료되었다. 아울러 사물 기생성을 가진 잿빛곰팡이병의 방제를 위해서는 잔재물에서 생장을 막는 것이 중요하며 이를 위해 예방을 전제로 한 방제의 경우 유기황을 주성분으로 하는 제제가 적용 가능할 것으로 생각된다. Inhibition effects on spore germination and mycelia growth for gray mold (Botrytis cinerea) were investigated in vitro using environment-friendly agricultural materials as well as environment-friendly pesticides. The inhibition effect on mycelia growth of gray mold is the highest when the gray mold mycelia were treated with a pesticide (commercial name: Koreayeok, Jihabudea KM, Sootingtan, Sootingstar) that contains a mixture of Bacillus subtilis, resulting in 100% inhibition of the mycelia growth. Meanwhile, the range of less than 20% inhibition effects on the growth of gray mold mycelia was observed with other commercial agricultural materials. The significant inhibition effects on spore germination of gray mold fungus were shown in vitro with two water dispersible pesticides containing sulfur [BTB (97.7%) and SulfurStar (92.3%)], respectively. These in vitro results of inhibiting of the spore germination and mycelia growth together cannot found. It remains to be determined whether the selected environment-friendly agricultural materials in effective control of gray mold in vitro can be used to control gray mold in field.

스마트앱어워드 금융부문_은행분야 최우수상 : IBK기업은행의 온,오프라인 연계 지급결제 서비스 -IBK ONE페이

곽영기(부장),안종혁(이사),송상희(대리) (사)한국인터넷전문가협회 2016 스마트앱 연감 Vol.2016 No.-

수치해를 이용한 선박의 점성저항 해석

곽영기(Young-Ki Kwak) 한국해양공학회 1997 韓國海洋工學會誌 Vol.11 No.2

Viscous flow around an actual ship is calculated by an use of RANS(Reynolds-averaged Navier-Stokes) solver. Reynolds stress is modelled by using k-ε turbulence model and the law of wall is applied near the body. Body fitted coordinates are introduced for the treatment of the complex boundary of the ship hull form. The transformed equations in the computational domain are numerically solved by an employment of FVM(Finite Volume Method). SIMPLE(Semi-Implicit Pressure Linked Equation) method is adopted in the calculation of pressure and the solution of the discretized equation is obtained by the line-by-line method with the use of TDMA(Tri-Diagonal Matrix Algorithme).<br/> The subject ship model of actual calculation is 4,410 TEU class container carrier. For 4 geosim models the calculated viscous resistance values are compared with the model test results and analyzed on their components. The resistance performance of an actual ship is predicted very reasonably, so this method may be utilized as a design tool of hull form.

HSVA 두 탱커 선형에 대한 점성유동 계산

곽영기(Young-ki Kwak) 한국해양공학회 1999 韓國海洋工學會誌 Vol.13 No.2

The viscous flow around a ship hull is calculated by the use of RANS (Reynolds-averaged Navier-Stokes) solver. Reynolds stresses are modelled by using the k-ε turbulence model and the law of wall is applied near the body. Body fitted coordinates are introduced for the treatment of the complex boundary of the ship hull form and the governing equations in the physical domain transformed into the ones in the computational domain. The transformed equations are numerically solved by an employment of FVM(Finite Volume Method). SIMPLE(Semi-Implicit Pressure Linked Equation) method is adopted in the calculation of pressure and the solution of the discretized equation is obtained by the line-by-line method with the use of TDMA(Tri-Diagonal Matrix Algorithme).<br/> To assure the propriety of this computing method, HSVA tanker and Dyne hull are calculated at both model and ship scale Reynolds number. Their results of pressure distributions on fore and aft body, axial velocity contours and transverse velocity vectors and viscous resistance coefficients are compared with other’s experiments and calculations.

친환경 유기 농자재의 고추 탄저병(Colletotrichum acutatum) 병원균의 생장 억제 효과

곽영기(Young-Ki Kwak),김일섭(Il-Seop Kim),조명철(Myeong-Cheoul Cho),이성찬(Seong-Chan Lee),김수(Su Kim) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.2

친환경 유기농자재를 이용하여 고추 탄저병균의 포자 발아, 균사생장 억제효과를 기내에서 조사하였다. 그 결과 균사생장 억제효과 기내검정. 탄저병의 균사생장 억제 효과는 Bacillus subtilis를 주성분으로 하는 제제가 100%의 억제효과를 보였으며, 그 외의 제제는 20~40%의 범위에서 억제효과를 나타내었다. 포자발아억제효과는 유황 수화제 2종(‘BTB’, ‘황스타’)이 각각 100%, 95.1%, ‘고려역’(95.0%), ‘보르스타’(99.0%), ‘지하부대 KM’(96.1%) 순으로 나타났다. 균사생장 억제와 포자 발아억제, 부착기 형성억제 결과를 고려하여 고추 탄저병 방제에 적용 가능한 친환경 방제제는 Bacillus subtilis, Panibacillus polymyxa 혼용제(‘고려역’)가 가장 효과적인 것으로 판단되었으며, 예방을 전제로 한 방제의 경우 유황 수화제, 보르도액을 주성분으로 하는 제제가 적용 가능할 것으로 생각된다. 본 연구에서 선택된 제제는 고추 포장에서 탄저병 방제효과가 최종적으로 인정되면 차후 고추 탄저병 방제에 이용될 것으로 사료된다. Inhibition effects on spore germination and mycelia growth for pepper anthracnose fungi (Collectricum acutatum) were investigated in vitro using eco-friendly agricultural materials as well as ecofriendly pesticides. The inhibition effect on mycelia growth of anthracnose fungi is the highest when the anthracnose mycelia were treated with a pesticide (commercial name: Koreayeok) that contains a mixture of Bacillus subtilis and Panibacillus polymyxa, resulting in 100% inhibition of the mycelia growth. Meanwhile, the range of 20~40% inhibition effects on the growth of anthracnose mycelia was observed with other commercial agricultural materials. The significant inhibition effects on spore formation of anthracnose fungus were shown in vitro with two water dispersible pesticides containing sulfur [BTB (100%) and SulfurStar (95.1%)], Koreayeok (95.0%), Borstar (99.0%) containing Bordeaux mixture, and Jihabudea-KM containing Psedomonas spp. (96.1%), respectively. Taken from these in vitro results of inhibiting of the spore germination and mycelia growth together, Koreayeok is the most effective on control of pepper anthracnose disease in vitro. In addition, two water dispersible pesticides containing sulfur (BTB and SulfurStar) and Borstar (99.0%) containing Bordeaux mixture are also significantly applicable to prevent pepper plants from anthracnose disease in vitro. It remains to be determined whether the selected eco-friendly agricultural materials in effective control of anthracnose in vitro can be used to control pepper anthracnose in field.

선미 점성 유동장에 미치는 척도효과에 관한 연구

곽영기(Y. K. Kwak),민계식(K. S. Min),오건제(K. J. Oh),강신형(S. H. Kang) 대한조선학회 1997 大韓造船學會 論文集 Vol.34 No.1

은나노 제품인 Pyto-patch의 제조공정 및 Pyto-patch의 고추 탄저병 방제효과

곽영기(Young-Ki Kwak),김성일(Seong-Il Kim),이종만(Jong-Man Lee),김일섭(Il-Seop Kim) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.2

나노 크기인 5㎚ 이하로 제조한 은나노제품(파이투패치)은 주요 식물병원균인 탄저병원균(Collectotrichum gloeosporioides), 잿빛곰팡이병원균(Botrytis cinerea), 균핵병원균(Sclerotinia sclerotiorum)에 대해 포자발아 및 균사생장을 억제하는 항균력이 있었다. 파이투패치 살포에 의한 고추탄저병 방제효과를 실험하기 위해 파이투패치 희석액에 포자를 침지하여 포습시킨 후 발아율을 조사한 결과 5ppm까지 희석한 처리구에서 병원균의 포자발아억제효과를 보였으며, 균사는 10ppm에서 생장억제효과가 15일간 지속되었다. 특히 파이투패치를 10ppm으로 희석하여 배지표면에 도말한 후 탄저병원균 포자를 접종하면 3일간 발아가 억제되어 식물체 감염을 효과적으로 예방하였으며, 40% 이상 발병한 시험구에 4ppm 파이투패치를 살포한 결과 21일 후 7% 이하의 발병과율로 무처리 대비 70% 방제효과가 있었다. 장마철 탄저병 발생율이 94.6%인 시험포장에서 10ppm 농도로 파이투패치를 7일간격으로 엽면살포한 결과 발병과 발생율이 5.8%로 방제효과를 확인하였으며, 수확한 홍고추를 자연건조한후에도 발병과율이 24.2%로 건고추 수확량도 증가하였다. 장마철 고추역병(Phytophthora capsici)은 장마가 끝난 무피복시험구에서 8월 11일 15%이었으며 고온기를 지난 9월 7일에는 발병율이 74%로 수확을 포기하였으나, 파이투패치를 코팅처리한 피복재를 씌운 시험구에서는 발병주가 2.3%로 장마철 역병발생이 효과적으로 방제되었다. The commercial product “pyto-patch” prepared as nano sized silver particle less than 5 nm, has effective antifungal activity against Collectotrichum gloeosporioides, Botrytis cinerea, Sclerotinia sclerotiorum in vitro. As a fungal growth inhibiton mechanism, it can reduce spore germination rate and mycelial growth. As s promising fungicide, Phyto-patch can control anthracnose effectively. The spore of C. gloeosporioides dipped in 5 ppm phyto-patch dilute suppressed germination rate to 13.2%, and mycelial growth stopped for 15 days at 10 ppm. The spore postinoculated on 10 ppm phyto-path smeared PDA surface could not germinate for 3 days and prohibit pathogen infection effectively. In field test, the anthracnose development of 4 ppm phyto-patch treated plot was less than 7% after 21 days compaired to 40% of it in untreated plot. In heavy rainfall season, pepper anthracnose effectivly contrrolled by regular 10 ppm phytopatch spraying every 7 days. The diseased pepper fruit decreased to 5.8% compaired to 94.6% in untreated plot. During drying period, the diseased pepper fruit havested in phyto-patch treated plot was 24.2%, but pepper fruit havested in untreated plot destroyed to 100% within 3 days. The nano silver particle coated on multching textile prevented late blight of pepper effectively and disease occurance delayed about month.