• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3851-3857
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• 2014

Shippers' requests of freight trains vary with time, but generating an additional schedule of freight trains is not easy due to many considerations, such as the line capacity, operation rules, and conflicts with existing trains. On the other hand, an additional freight train schedule has been continuously requested and manually processed by domestic train operation companies using empirical method, which is time consuming. This paper proposes a model to determine the additional freight train schedule that assesses the feasibility of the added freight trains, and generates as many additional schedules as possible, while minimizing the delay of the existing schedules. The problem is presented using time-space network, modeled as multi-commodity flow problem, and solved using the column generation method. Three levels of experiment were conducted to show validity of the proposed model in the computation time.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.12
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• pp.6461-6468
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• 2013

This research is conducted to investigate musculoskeletal diseases' that can be developed in paramedics body whose are in charge of emergency situations before they arrive at the hospital. The data were collected from 216 of paramedics from July 2, 2012 to July 31, 2012. As a result, 57.9% of participants have already felt the subjective symptoms of the muscular skeletal diseases, and 47.2% of them felt the pain on their waists and hips. These pains are highly related to their working situations. In the aspects of the muscuoskeletal diseases' symptoms, general characteristics, gender (t=16.579, p=.000), age (t=102.344, p=.000), education (t=5.363, p=.027), drinking (t=6.999, p=.030), and smoking (t=6.266, p=.009), have significance differences. Professional characteristics, career (t=67.684, p=.000), passengers of the ambulance (t=7.717, p=.004), qualification or license (t=25.480, p=.000), and position (t=74.615, p=.000), have also significance differences.

• Journal of the Korean Association of Geographic Information Studies
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• v.9 no.3
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• pp.107-122
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• 2006

The main objective of this study is to develop a web-based Geographic Information System (GIS) application, IGIS(Integrated Groundwater Information Service System), for efficient management of groundwater data. This integrated system includes various groundwater measurements, monitoring data, well data, hydrogeochemical data, hydrogeological maps and diversely analyzed results including time series analysis data for water levels and quality. It will be used efficiently for local government officers to manage groundwater within their districts and also for drillers and investigators to develop wells and assess groundwater conditions. This web-based GIS system was implemented firstly for Cheonan and Daegu city. As a result, the system makes the efficient management, distribution and utilization of groundwater data possible by web-based GIS technology.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.5
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• pp.499-506
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• 2011

In this study, the performance of composite safety barriers was evaluated through computer simulation. A composite safety barrier of SB4 grade was modeled. The MAT58 material model provided by LS-DYNA software was used to model composite material. The performance of composite material varies according to fiber, resin type, and fiber direction. Polyurethane resin and glass fiber were used. The performance of three different stacking designs was evaluated by carrying out vehicle impact simulation. The performance evaluation based on the vehicle crash manual includes the structural strength performance, the passenger protection performance, the vehicle behavior after crash, scattering of the guardrail. As the result of the finite element analysis, the barrier composed of the more transverse direction fibers shows the better performance on the impact simulation.

• The Korean Journal of Emergency Medical Services
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• v.15 no.2
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• pp.27-42
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• 2011

Purpose: This study intended to improve quality of prehospital emergency care for trauma patients by figuring out its current situations and problems based on run-sheets and questionnaires of 119 emergency medical technicians (EMTs). Methods: This study conducted a research of 425 trauma patients transferred to the 3rd hospital in G-city by 119 ambulances from July 1, 2008 to June 30, 2009. We aslo utilized 114 copies with questionnaires of 119 EMTs working in J-province. The data were analyzed with SPSS 18.0. Results: There were 425 trauma patients including 272 men and 137 patients with traffic accident. When it comes to types of 119 EMTs who delivered cares to patients, there were 206 (48.5%) advanced EMTs, 101 (23.8%) basic EMTs, 50 (11.8%) nurses and 43 (10.2%) rescue education receivers. The most frequent measured vital sign was pulse rate (54.1%). Regarding assessment of systolic blood pressure, pulse rate and respiration rate, there were some significant differences in accordance with type of 119 EMTs. Among the 317 patients evaluated 'emergency' in field, 137 patients returned to their home. Prehospital emergency cares accounted for 861, around 2.0 treatments per a patient. In view of questionnaire, the 74.6% of 119 EMTs hoped supplement of man power for proper prehospital care to trauma patients. Conclusion: This study suggested that it is necessary to develop detailed guidelines for trauma patients so as to improve quality of trauma patient evaluation and prehospital care. Furthermore, improvement of emergency care systems will reduce mortality of trauma patients and lead to their good outcome.

• KIEAE Journal
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• v.16 no.6
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• pp.95-101
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• 2016

Purpose: This study aims to identify the effect of temperature reduction by the application of cool roof coatings to Changwon City Hall in South Gyeongsang Province. The indoor and outdoor temperatures of the cool roofing building were analyzed and compared to that of an existing building with green-colored roof coated with waterproof polyurethane. Method: The surface temperatures and reflectivity of rooftops, surface temperatures of ceilings and the interior, and outdoor temperature and humidity of the two aforementioned buildings were measured from June to September in 2014. The measurements were taken every 10 min. Result: The surface temperature of the building with the cool roof was lower by a maximum of $9^{\circ}C$ with the reflectivity of the rooftop at an average of 0.55, which is higher than that of the building with green polyurethane by approximately 0.3. The temperature of the ceiling inside the building with the cool roof was about $1{\sim}2^{\circ}C$ lower than that of the ordinary building. Also, the indoor temperature of the office with cool roof coatings was about $0.5{\sim}1.0^{\circ}C$ lower than that of the office with green-colored roofing building. The results show that cool roof coatings can lower the temperature of buildings. In the next research, the reduction in consumption of energy for air conditioning will be investigated by utilizing building energy simulation tools.

• KDI Journal of Economic Policy
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• v.13 no.3
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• pp.89-112
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• 1991

본고(本稿)는 금융시장(金融市場)의 규모(規模)와 금융산업구조(金融産業構造)와의 관계에 대한 몇가지의 가설(假說)을 미국(美國), 영국(英國), 독일(獨逸), 프랑스, 캐나다, 이탈리아, 스웨덴, 벨기에, 네덜란드, 스페인 등 11개 OECD국가와 한국(韓國)의 시계열자료(時系列資料) 및 동(同) 자료(資料)의 크로스섹션결합자료(結合資料)를 이용하여 검증하였다. 검증결과에 의하면, (1) 각국의 직(直) 간접금융비중(間接金融比重)은 전체 금융시장규모에 의해 유의하게 영향을 받고 있으며, (2) 직(直) 간접금융(間接金融)은 시장규모(市場規模)의 확대(擴大)에 따라 어느 하나가 압도함이 없이 일정한 균형비율로 수렴해 나가는 것으로 관찰되고 있어 세계금융산업(世界金融産業)은 일반적으로 전업균형(專業均衡)보다는 전업(專業) 및 겸업(兼業)의 혼합균형(混合均衡)으로 이행해 나갈 것으로 기대되며, (3) 최근 진행되고 있는 금융(金融)의 세계화(世界化) 및 개방화(開放化) 추세(趨勢)는 궁극적으로 각국 금융산업조직(金融産業組織)의 동질화(同質化)를 촉진시킬 것으로 나타나고 있고, (4) 금융시장규모(金融市場規模)의 확대(擴大)에 따른 혼합균형(混合均衡)으로의 이행과정에서는, 겸업주의(兼業主義) 은행제도(銀行制度)는 금융시장의 규모가 상대적으로 작은 경제에서, 역으로 전업주의(專業主義) 은행제도(銀行制度)는 금융시장의 규모가 상대적으로 큰 경제에서 주로 형성되는 경향이 있는 것으로 관찰되었다. 부수적으로는, 전업주의(專業主義) 금융제도(金融制度)에 비해 금융업무(金融業務)의 자유(自由)를 보다 더 허용하는 겸업주의(兼業主義) 금융제도(金融制度)가 균형금융구조(均衡金融構造)로의 이행(移行)을 촉진시키고 있다는 점도 발견되었다. 이상의 검증결과는, 금융산업(金融産業) 및 제도(制度)는 이를 받치는 전체 금융(金融)의 규모성장(規模成長)에 따라 적절한 균형구조(均衡構造)를 찾아가는 것이기 때문에 전체 금융의 성장과정 및 속도에 부응하지 못하는 인위적인 금융개편정책(金融改編政策)은 바람직하지 못하다는 시사를 주고 있다.

• KIEAE Journal
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• v.17 no.1
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• pp.23-28
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• 2017

Purpose: Many design index that are using in planning phase have been developed. The most popular things among them are Window to Wall Ratio and Surface to Volume Ratio. However there are some limits. Window to Wall Ratio cannot consider building size and Surface to Volume Ratio cannot do Window to Wall Ratio. Accordingly, in this paper, the Window to Floor Ratio was proposed that it can be considered both building size and Window to Wall Ratio. And analyzed correlation of energy demand. Method: For the test, 16 modules with the size of $6m{\times}6m{\times}4m$ were used to make 35 models with the same volume. The simulation was conducted to 945 cases using the window-to-wall ratio of 30, 50 and 70 % in three areas such as Seoul, Gwangju and Jeju and three kinds of windows. And IES_VE was used. Result: The findings above show that the Window to Floor Ratio that can be considered both building size and Window area have to become as design index. It was found out that design criteria with SHGC is necessary, not with the thermal performance (U-value). It is needed to additional analysis about residential building and the effect of 24-hours heating and cooling condition. It plans to carry out research to establish design indicators for climatic conditions in the country and building applications.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.301-304
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• 2004

The curtain wall engineering of local high-rise buildings consists of many phases such as design, curtain wail design, manufacture, procurement, construction and facility management, each of which also involves many' actors such as architect, curtain wall consultants, manufacturers, contractors, and facility managers. Moreover, the method for controlling the C/W process of each participant is needed. Eliminating wastes and problems existed in the C/W process can be more effective. What is more, it is necessary to improve the efficiency of the current process and to strengthen the competence through application of SCM to the C/W life-cycle. In addition, it is important that a ]ot of information transfer smoothly and share through information system. Therefore, this study aimed to propose the scope of application and the improvement directions in applying Supply Chain Management concept.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.242-245
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• 2004

Recently, the design-build delivery system is being generalized in domestic construction project. The design-build system is becoming an increasingly preferable alterative to design-bid-build delivering method. In design-build project, however, a large construction company and design firm make up consortium as a design-build contractor rather than single company performs design and construction work. In this case, usually the construction companies take a leading role but due to their lack of managerial know-how in the design-build system, they could miss the merits of this approach. Therefore, it is necessary to investigated throughly the function and information flows all over the design-build project. In this research suggests a process model and database in the whole phase of design-build project. This process model and database system will also support to Improve the consistency of functional process and minimize incoherent activities in each phase of design-build project.