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      • KCI등재

        국내 도로화물수송의 허브네트워크 설계

        김남주 ( Nam Ju Kim ),김용진 ( Yong Jin Kim ) 한국로지스틱스학회 2012 로지스틱스연구 Vol.20 No.2

        본 연구는 허브간 수송비용할인의 비제약 허브네트워크를 설계하여 김남주 외 (2008), 김남주와 김용진 (2011)의 연구를 개선하였다. 허브간 대용량수송과 공차율 저감으로 인한 수송비용 절감효과를 고려하되 허브경유의 우회수송이 비용효과적이지 않을 경우 기종점간 직송을 하는 현실 수송시장특성을 반영할 수 있도록 설계했으며, 분석결과를 기존연구와 비교 종합검토하였다. 국내 도로화물수송망에 적용한 결과, 허브수가 늘어날수록 기종점 수요의 허브경유로 인한 우회수송의 증가로 톤km는 점차 증가하는 반면, 허브간 집적수송의 규모의 경제효과로 수송비용은 점차 감소하였다. 최적 허브입지는 전구간과 허브간의 수송비용 할인구간, 제약과 비제약의 허브정책 등 허브네트워크 설계방법과 무관하게 허브수가 늘어남에 따라 수도권, 경상권, 충청권, 전라권의 순서로 선정되었으며, 수송의 간선축인 경부축에 집중되었다. 허브수 증가에 따른 수송비용의 한계감소율은 허브간 수송량 분산에 따른 규모의 경제효과 감소로 허브수가 늘어남에 따라 감소하였다. 또한, 수송량 증가에 따른 비용할인효과가 클수록 허브간 거리가 멀어지는 반면, 비용할인효과가 작을수록 허브간 거리는 가까워졌다. 본 연구는 GIS프로그램을 이용한 공학적 접근방법을 통해 현실 수송특성을 반영할 수 있는 허브네트워크를 설계한 것으로, 산출된 허브입지는 실제 운영, 건설, 계획 중인 내륙화물기지입지와 유사한 것으로 나타났다. 향후, 내륙화물기지 신설 및 확장 타당성 검토 등 국가 수송비용을 절감하려는 정책적 측면에서 의미가 있을 것으로 판단된다. This study presents an algorithm and conducts a computer experiment based on real field data of Korea that determines optimal number and location of hubs and routes among shippers to minimize total transport costs. The algorithm is a non-strict hub network design policy based on the fact that freight trucking between hubs can reduce the costs due to large size cargo and reduced empty movement. Furthermore, the algorithm allows direct transportation between shippers if a route connecting hubs is not cost- effective, which is different from the assumption in the previous study (Kim et al. 2008). A greedy-interchange algorithm was employed for hub location decision process and EMME/2 was applied to find route searching process. Applied to national road transport network of Korea, as the number of hubs increase, Seoul metropolitan, Gyeong-Nam, Chung-Nam, Jeon-Nam, Gyeong-Buk, Chung-Buk are selected in order. Freight traffic is concentrated on main corridor between Seoul and Busan area. The proposed non-strict hub network design policy may increase the transportation distances but can reduce overall transport costs by passing through the hubs. Total transport costs reduction can be achieved as the number of hubs increase. However the marginal amount of reduction by increasing number of hubs gradually decreases because the cost reduction of decreased detour transportation length between non-hubs and hubs is smaller than the amount of discount reduction for dispersion of inter-hubs transportation volumes.

      • KCI등재후보

        섬유형성이상 환자의 눈 소견

        김남주,왕규창,김석화,손우길,황정민,Nam Ju Kim,Kyu Chang Wang,Suk Wha Kim,Woo Gil Son,Jeong-Min Hwang 대한안과학회 2006 대한안과학회지 Vol.47 No.5

        Purpose: Fibrous dysplasia is an uncommon disease that replaces normal bone tissue with fibrous and osteoid tissue. We evaluated patients with fibrous dysplasia involving orbital bones to identify the ocular characteristic findings. Methods: We recruited 6 patients with fibrous dysplasia of the craniofacial bone. Best corrected visual acuity and facial asymmetry were measured. Slit lamp biomicroscopy, tonometry, strabismus examination, and funduscopy were performed. Results: Strabismus, exophthalmos and optic neuropathy were found in 5, 4, and 2 patients, respectively. One patient underwent a strabismus surgery. One patient had McCune-Albright syndrome, exhibiting a caf?-au-lait spot of the skin and precocious puberty. All 6 patients had facial asymmetry and higher superior orbital rims of the affected side in 5 patients. Conclusions: Ophthalmologic examination may be mandatory for patients with fibrous dysplasia involving the orbit, especially to prevent optic neuropathy. If optic atrophy, strabismus or exophthalmos is found in patients with facial asymmetry, the possibility of fibrous dysplasia must be considered.

      • KCI등재후보

        노후산업단지 재생사업 효과분석 개선 연구

        김남주,Kim, Nam Ju 한국토지주택공사 토지주택연구원 2020 LHI journal of land, housing, and urban affairs Vol.11 No.1

        This paper proposed an effect analysis method that meets the characteristics and purposes of the revitalization project for old industrial complexes, and quantified the economical effects about the project in Jeollabuk-do by case analysis. The problems on the existing effect analysis about revitalization project for old industrial complexes, estimated as transportation benefits on the main entrance roads plan and the increased rent benefits on the internal roads and other plans, were examined. In addition, the land use plan ratio on the old industrial complexes compared to the averages, and the surveys to the residential company were conducted. And this paper finally proposed an effect analysis methodology for the revitalization project for old Industrial Complexes in consideration of the increase in the operation rate and the added values through the conversion to high value-added industrial sectors. It was analyzed that new value added of KRW 743,278 million can be generated for next 30 years when the revitalization project for old Industrial Complexes in Jeollabuk-do is implemented.

      • KCI등재후보

        아래눈꺼풀결막의 덧눈물샘에서 발생한 양성혼합종 1예

        김남주,정호경,곽상인,Nam Ju Kim,Ho Kyung Choung,Sang In Khwarg 대한안과학회 2006 대한안과학회지 Vol.47 No.10

        Purpose: Benign mixed tumor of the accessory lacrimal gland is a very rare neoplasm, with only one case with presumed origin of Wolfring`s gland in domestic literature. We report our experience with a case of a nodular lesion of the lateral lower eyelid which is completely excised and histologically diagnosed as benign mixed tumor from Krause`s gland. Methods: A 68 year-old woman presented with 1 cm-sized subcutaneous mass in right lateral lower eyelid. A hard non-tender movable mass was palpated. After 6 months of observation, the mass was excised through subciliary skin incision. Results: The mass was located deep to the subcutaneous tissue, inferior to lower border of tarsal plate, and was adherent to inferior forniceal conjunctiva. Round 1.2 cm-sized yellow-pink mass was completely excised. Histologic examination showed many glandular elements embedded in a myxoid ground substance, and glandular structures were composed of two layers of inner cuboidal and outer polygonal cell. It was diagnosed as benign mixed tumor from accessory lacrimal gland of Krause. Conclusions: In any case presenting lower eyelid mass lesion, benign mixed tumor of accessory lacrimal gland should be considered as one of the differential diagnosis.

      • KCI등재후보

        눈꺼풀결막에 발생한 점막표피암

        김남주,곽상인,Nam Ju Kim,Sang In Khwarg 대한안과학회 2006 대한안과학회지 Vol.47 No.10

        Purpose: We report our experience with a case of a nodular lesion of the lower palpebral conjunctiva with histologic features consistent with mucoepidermoid carcinoma. Methods: A 72 year-old man presented with a left lower palpebral conjunctiva lesion. 3X3 mm sized flat pedunculated yellowish red mass was observed. Incisional biopsy proved the mass a mucoepidermoid carcinoma and wide local resection was conducted. Results: Hematoxylin and eosin-stained sections showed lobules of tumor cells, consisting of predominantly epidermoid cells and scattered islands of mucin-secreting cells. Mucicarmine-stained sections demonstrated strong positivity, consistent with the diagnosis of mucoepidermoid carcinoma. Conclusions: In any case presenting palpebral conjunctival lesion, mucoepidermoid carcinoma should be differentiated, and it is necessary to confirm the diagnosis through biopsy.

      • KCI등재후보
      • KCI등재

        구조 베이지안 벡터자기회귀(SBVAR) 모형을 이용한 숙련편향적 기술진보의 고용효과 분석

        김남주(Nam Ju Kim) 한국경제연구학회 2015 한국경제연구 Vol.33 No.4

        본 논문은 장기 무영향 및 부호제약을 적용한 구조 베이지안 벡터자기회귀(SBVAR) 모형을 이용, 숙련편향적 기술진보(skill-biased technological change)가 고용에 미치는 영향을 분석하였다. 1980년부터 2012년까지 우리나라의 연간 고용자료를 이용하여 분석한 결과, 숙련편향적 기술진보는 미숙련근로자를 대체하며 나아가 총고용 수준의 하락도 초래하였다. 아울러 숙련편향적 기술진보는 총고용수준 변동을 설명하는데 상당히 유의하지만 숙련(skill)을 측정하는 방법(학력 내지 직무)에 따라 총고용, 임금프리미엄, 숙련상대고용 변동에 대한 설명력은 크게 달라졌다. This paper constructs a yearly skill premium by college and tasks for the Korean labor market and analyzes the effect of skill-biased technology shock on total hours worked in a Structural Bayesian VAR with long-run zero and sign restrictions. By any measure of skill premium, significant fall in total hours worked in response to skill-biased technology shock can be confirmed and this fall mainly originates from the severe reduced employment of unskilled labor. In addition, skill-biased technology shock can be influential in explaining the variation of total hours worked. However, its explaining power for the variation of total hours worked, skill premium, and relative hours worked of skilled labor can be quite different by the way how skill premium can be measured.

      • KCI우수등재

        대규모 주택사업지구로의 인구유입 분포

        김남주(Kim Nam-ju) 대한국토·도시계획학회 2011 國土計劃 Vol.46 No.3

        This paper presents the distribution model of population influx according to the migration distance and its moving time to new housing development area by empirical studies with real subscription data of recent Housing Project in Korea. GIS program and EasyFitXL software is used for fitting the distribution of population influx. The influx rate is highest in the administrative district located in the housing project, and becomes smaller as the distance from project site being farther. The 25% of population influx is located in around 7㎞, and 50% is in about 10㎞, and there is little influx out of 40㎞ and 60minutes from the project site. The influx rate curve forms a concave Dagum distribution which is not decreased monotonically, and the type of housing subscription does not affect the influx rate curve. It is the spatial distance not the time distance which immigrants consider as a important factor in migration into the new Housing Development Area. This paper is expected to be helpful to make policy-decision about developing extra infrastructure development, and the several urban, transportation, and social issues caused by inter-regional population movements to new housing development area.

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