부산항 신항 배후단지 입주업체 특성별 생산성 비교연구

김양욱(Yang-Wook Kim),차재웅(Jae-Ung Cha),김율성(Yul-Seong Kim) 한국항해항만학회 2020 한국항해항만학회지 Vol.44 No.6

우리나라는 항만의 기능 다각화 및 부가가치 창출을 목표로 국내 주요 무역항에 항만배후단지를 단계적으로 개발해왔다. 그러나 이러한 목표를 달성하기 위한 배후단지 입주업체 선정기준에 관한 연구는 아직 부족한 실정이다. 본 연구는 부산항 신항 배후단지를 대상으로 입주업체 특성별 생산성을 비교분석하여 입주업체 선정기준 마련에 기여하고자 하였다. 분석을 위해 67개 업체들의 최근 3년(2017-2019)간 운영실적 자료를 수집하여 단일요소생산성을 측정하였다. 그 결과, 물류업은 물동량, 제조업은 매출액 측면의 생산성에 강점이 있는 것으로 나타났다. 또한, 상대적으로 개장시기가 빨랐던 북컨테이너 배후단지가 웅동 배후단지에 비해 전반적인 생산성이 높았다. 마지막으로 외국인과 시설·설비 투자규모에 따른 생산성의 경우 전반적으로 투자규모가 평균 미만인 업체들이 평균 이상인 업체들보다 생산성이 높은 것으로 분석되어 부정적인 상관관계를 보였다. 따라서 항만배후단지의 생산성 및 경쟁력을 강화하기 위해서는 입주업체들의 고용 및 화물 창출 능력을 제고할 수 있는 제도적·법률적 보완과 신규 입주업체 선정기준의 재확립이 필요하다고 판단된다. Korea has gradually been developing port distriparks in major domestic trade ports to diversify their function and create added-value. New tenant companies are needed to help achieve these goals, but no research has been done on selection criteria. To provide such criteria, this study conducted a comparative analysis of the productivity of tenant companies in Busan New Port Distripark based on their characteristics. SFP (single-factor productivity) was measured using the operational data of 67 companies in the distripark over the past - three years (2017-2019). The results indicate that the logistics business and the manufacturing business have strengths in cargo volume productivity and in sales productivity respectively. Also, Northern distripark, a relatively older facility, was found to be more productive than Ung-dong distripark. Finally, the effect of investment—both foreign and in FAC/EQ (facility and equipment)—on productivity showed an inverse relationship with productivity, with the companies with under-average investments being more productive than those whose investments were above average. Therefore, to enhance the productivity and competitiveness of port distriparks, tenant companies must be subject to supplemented system and law for increasing employment and cargo volume, and reestablished selection criteria.

Prazosin의 항고혈압 효과에 대한 임상적 관찰

서세웅,이균태,김연호,조성락,신영우,신영기 최신의학사 1984 最新醫學 Vol.27 No.8

VP-16으로 성공적으로 치료된 위 Kaposi 육종 1예

양웅석,송근암,조몽,이재승,송철수,김형욱,김영민,이수봉,김태오,이성훈 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4

The skin is an uncommon site of distant metastasis from any internal malignancy, and the incidence of metastatic skin lesions as the first symptom of disease is only 0.8% in patients with all systemic malignancies. Furthermore, cutaneous metastasis from adenocarcinoma of the stomach has been found to be extremely rare. A 35-year-old female patient was admitted due to multiple cutaneous nodules in her chest, abdomen, and back. A gastroendoscopic examination and biopsy was made according to the results of skin pathologic findings. Stomach and skin biopsy results revealed a signet ring cell type of adenocarcinoma. A case of gastric adenocarcinoma in which metastatic skin nodules appeared as the first sign of disease, is here in reported with a review of related literature.

콘크리트 포장의 플라이애쉬 재활용 방안연구

정영화,최성용,윤경구,용석응,김태경 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-

한국 대부분의 고속도로는 콘크리트로 포장되고 있으며, 플라이애쉬를 포장용 콘크리트에서 재활용하면 콘크리트의 성능을 향상시킴과 동시에 경제적 이익과 환경보호에 큰 기여를 할 것이다. 본 연구에서는 플라이애쉬를 포장 콘크리트에 재활용하고자, 플라이애쉬 치환율, 물-시멘트비, 굵은골재 최대치수를 주요실험 변수로 하여 이들이 플라이애쉬를 혼입한 포장용 콘크리트의 역학적 특성에 미치는 영향을 살피기 위해서 실험하여 통계처리 분석하였다. 이러한 분석결과를 바탕으로 포장 콘크리트의 적정배합을 제시하였으며 결과는 다음과 같다. 플라이애쉬를 혼입한 포장콘크리트의 휨강도에 영향을 미치는 인자는 플라이애쉬 치환율이 가장 큰 것으로 나타났으며, 다음으로 굵은골재 최대치수와 물-시멘트비 순으로 영향을 미친다. 또한, 플라이애쉬 치환율과 굵은골재 최대치수의 상관관계가 가장 큰 것을 알 수 있었다. 목표압축강도를 목표 휨강도의 6배로 선택하여 적정구간을 결정하였으나, 적정배합구간이 목표압축강도에 의해서 결정되었다. 이는 플라이애쉬의 작은 수화물이 공극을 효과적으로 채움으로써 휨강도의 증진에 크게 기여하기 때문으로 판단된다. 고속도로 포장에 적용할 수 있는 32mm의 굵은골재 최대치수와 45%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 5.0%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.5%까지 치환 가능하다. 공항 포장에 적용할 수 있는 40mm의 굵은골재 최대치수와 37%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 4.5%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.0%까지 치환 가능하다. The most of highway in Korea have been paved by concrete since last ten years. The recycling of fly ash in pavement concrete may result in economics, the improvement of concrete quality and the reservation of environment. This paper focused on the series of experiment and statistics analysis with experimental variables such as fly ash substitute ratio, water-cement ratio and maximum size of coarse aggregate in order to investigate the feasibility of recycling of fly ash in pavement concrete, to see the strength characteristics and t propose the optimum mix design based on previous results. The results of experiments and analysis were follows; The fly ash substitute ratio affected most seriously to the flexural strength of concrete among main variables, followed by maximum size of coarse aggregate and water-cement ratio. The interaction between fly ash substitute ratio and coarse aggregate size was the biggest. The optimum mix design was determined by target compressive, which was selected as 6 times of flexural strength. This indicated that the small hydrate of fly ash in concrete filled in effectively and resulted in the enhancement of flexural strength. the optimum mix design for highway pavement concrete with 32mm of maximum size of coarse aggregate and 45% of W/C can incorporate up to 5.0% and 2.5% of fly-ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively. The optimum mix design for airport pavement concrete with 40mm of maximum size of coarse aggregate and 37% of W/C can incorporate up to 4.5% and 2.0% of fly ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively.

Effect of Cooling Rate and Particle Size on Compressive Strength of Macroporous Hydroxyapatite

Kim, Yeon Ung,Lee, Byung Hyun,Kim, Min Chul,Kim, Kyoung Nam,Kim, Kwang Mahn,Choi, Seong Ho,Kim, Chong Kwan,LeGeros, Racquel Z.,Lee, Yong Keun Trans Tech Publications, Ltd. 2006 Key Engineering Materials Vol.309 No.-

<P>The objective of this study was to produce a macroporous hydroxyapatite(HA) scaffold with high strength by controlling the size of HA particles as well as cooling rate from the sintering temperature. Macroporous polyurethane sponge was employed as template to manufacture the macroporous HA scaffolds. Particle sizes of HA powders selected in this study were 4 µm and 7 µm. They were dispersed in distilled water with organic additives and infiltrated into polyurethane sponge. After drying and sintering at 1300oC, cooled down to room temperature slowly to prevent microcracking either 1oC/min or 3oC/min. Density, porosity and compressive strength were measured with different particle size and cooling rate. Both density and compressive strength were increased with decreasing particle size or cooling rate, while porosity was not related to.</P>

Effect of Calcium Phosphate Glass on Compressive Strength of Macroporous Hydroxyapatite Scaffold

Kim, Yeon Ung,Kim, Min Chul,Kim, Kyoung Nam,Kim, Kwang Mahn,Choi, Seong Ho,Kim, Chong Kwan,LeGeros, Racquel Z.,Lee, Yong Keun Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.284 No.-

<P>This study presents the manufacture of macroporous hydroxyapatite scaffolds with a small amount of calcium phosphate glass powder as sintering additives. Hydroxyapatite slurry was prepared by suspending the hydroxyapatite and glass powder in water. Polyurethane sponge was used to produce highly macroporous scaffolds. The rheological characteristic of the slurry was measured to identify the effect of adding calcium phosphate glass powder into hydroxyapatite slurry. Sintered scaffolds could be repeatedly coated to improve mechanical properties. Scaffolds prepared by single and double replication cycle process were characterized by density, porosity and compressive strength measurements by increasing amount of the calcium phosphate glass powder to the hydroxyapatite slurry, viscosity by increased more than same amount of pure hydroxyapatite, and the capillary force was similar to pure hydroxyapatite slurry. The compressive strength of the macroporous hydroxyxapatite scaffold containing the calcium phosphate glass powder showed higher value than that of pure hydroxyapatite at single replication cycle. SEM demonstrated that the microstructure of the scaffold became denser with the introduction of the calcium phosphate glass powder. The pore struts were thicker as replication cycle was increased.</P>

일반연제 발표 : 생체신이식 환자에서 Cyclosporine+Mycophenolate Mofetil (MMF)과 Tacrolimus+Mycophenolate Mophetil 병합요법의 스테로이드 중단 성공률의 비교 연구

김범 ( Kim Beom ),허우성 ( Heo U Seong ),김정아 ( Kim Jeong A ),강우헌 ( Kang U Heon ),김윤구 ( Kim Yun Gu ),김대중 ( Kim Dae Jung ),오하영 ( O Ha Yeong ),이광웅 ( Lee Gwang Ung ),김성주 ( Kim Seong Ju ),조재원 ( Jo Jae Won ) 대한신장학회 2003 춘계학술대회 초록집 Vol.22 No.1

류마티스 관절염 발생 후 조기에 발생한 신 유전분증

김성헌 ( Kim Seong Heon ),장호식 ( Jang Ho Sig ),정창욱 ( Jeong Chang Ug ),장재영 ( Jang Jae Yeong ),조성 ( Jo Seong ),김성록 ( Kim Seong Log ),김활웅 ( Kim Hwal Ung ) 대한신장학회 2004 Kidney Research and Clinical Practice Vol.23 No.1

We experienced a case of secondary renal amyloidosis diagnosed by renal biopsy in a patient who had been diagnosed as RA two years ago. A 62-year old man was admitted to neurology departement because of right hemiplegia. During conservative care at neurology department, he was consulted to us because of aggravated generalized edema and proteinuria. He was diagnosed as rheumatoid arthritis and ulcerative colitis two years ago, and then he had taden prednisolone, methotrexate, mesalazine regularly. At physical examination, there was no abnormal finding except pretibial pitting edema and right hemiplegia. In urinalysis, specific gravity was 1.025, pH was 5.5 protein was 4+ and RBC 0-1/HPF and WBC 0-1/HPF. Total protein of 24 hour`s urine was 5.5 g/day. The blood BUN and creatinine level were 16.4 mg/dL. The blood BUN and creatinine level were 16.4 mg/dL, 0.4 mg/dL and cholesterol level were 154 mg/dL, total protein and albumin were 4.4 g/dL and 1.9 g/dL. Serum RA factor and CRP showed high level as 94.90 IU/mL and 118.00 mg/L. On urine electrophoresis, albuminuria was dominant but M-spike was not founded. On urinalysis taken at the time of first diagnosis of rheumatoid arthritis two years ago, proteinuria was negative and serum albumin levels was 3.6 g/dL. At that time, there was no evidence of nephropathy. In renal biopsy, electron microscope showed heavy nonbranching amyloid fibrils accumulated in mesangium and polarized light microscopy after Congo-red staining revealed apple-green birefringent amyloid deposits in glomeruli and blood. So we diagnosed renal amyloidosis associated with RA. (Korean J Nephrol 2004;23(1):163-168)

A Study on the Extraction and Purification of Glutathione from Yeast

Kim, Seong Ung,Yang, Choong Ik,Min, Shin Hong,Rhee, Sanghi,Kim, Yong Bae 한국약제학회 1978 Journal of Pharmaceutical Investigation Vol.8 No.2

During the course of studies on the production of glutathione from yeast, process development and optimization was carried out. The optimal pH for the extraction of glutathione was found to be 2.5 to 4.0 and the maximum yield for glutathione was obtained when the extraction temperature was 25 to 45℃. The cuprous salt of glutathione was recovered maximally at the range of 2 to 4g of cuprous oxide per 10 ㎏ of compressed yeast. Further purification was needed for the removal of impurities from glutathione. Cation exchange resin, anion exchange resin and Sephadex G-25 were employed for this purpose. 13 to 15 g of glutathione was obtained from 10 ㎏ of compressed yeast and the purity was above 99.3%.

A Study on Post-Quantum Cryptography based Defense Card type USB Security Token

Kim Seon-Ung,Kim Joo-Min,Sim Seong-Su,김양하 한국산업경영시스템학회 2021 한국산업경영시스템학회 학술대회 Vol.2021 No.춘계

In this paper, following the recent development of optical transmission device equipped with Post-Quantum Cryptography, it proposes to improve the level of defense security system by applying USB security token with Q-PUF USB technology. Although trends of quantum computer development are currently in progress, quantum computer, which have been developed so far, have exceeded the computational capabilities of existing supercomputers. This allows us to easily decode the public certificates and encryption keys. Although the frequency of using public certificates is decreasing due to the abolition of public certificates in May 2020, Republic of Korea Army still uses public certificates for various defense authentication systems. This reality calls for a stronger security systems. Meanwhile, korean technology companies have developed a portable USB security token that can increase security against the use of the quantum computer, and the author suggests the application of it at the defense environment. This report suggests the application of the defense and its expected effectiveness.