• 대한안전경영과학회지
• /
• 제10권4호
• /
• pp.173-179
• /
• 2008

The portion of air logistics is getting growing in the global logistics and customer need the rapidity and accuracy for freight delivery. But, the process of air logistics is so complicated because there are too many stakeholders involved in the process. So we suggest the way to make simple the process for improving ability of handling air freights. First, we analyze the AS-IS process and problems by studying previous documents and researching the field. Also we offer how to adopt the ways that are solutions concerning AS-IS process. Second, we suggest integrated information system that will make it simple the air logistics process and mitigate the intensive work load of air cargo. Also we show the reliance about our suggestion by simulation comparing TO-BE process to AS-IS process. We result in that this study will contribute to improve air logistics process by making simple the process.

• 한국기계가공학회지
• /
• 제6권2호
• /
• pp.52-58
• /
• 2007

This study shows a numerical method to predict automobile type air conditioner tube connector in the forming process. The simulation approach with 3-D FEM program(ABAQUS) for forming process, forming process simulation is in good agrement with it in tendency. Finally, we compared the forming result with simulation. The result of research showed thai forming process technology is promising to produce automobile type air conditioner tube connector.

• 한국정밀공학회지
• /
• 제25권1호
• /
• pp.72-78
• /
• 2008

Metal stamping is widely used in the mass-production process of the automobile. During the stamping process, air may be trapped between the draw die and the panel and/or between the punch and the panel. Air pocket rapidly not only increases forming load in the final stage, but also deforms the product just formed by compressive air inside the air pocket in knockout process. To prevent these problems air bent holes are drilled in the die to exhaust the trapped air but all processes associated with air bent holes are performed by empirical know-how of workers in the field due to lack of researches. Therefore this study developed an automated design system for predicting the shape and position, and volume of air pocket on the draw die by using the AutoLISP language under AutoCAD circumstance. The system is able to display the shape of air pocket occurred in the draw die and to calculate automatically its volume by strokes. So it makes a stepping stone to calculate theoretical size of an air bent hole and numbers according to it by predicting and analyzing the position and volume of air pocket. Results obtained from the system enable the designers or manufacturers of the stamping die to be more efficient in this field.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2008년도 춘계학술대회
• /
• pp.383-387
• /
• 2008

Nowadays, the tendency of world air cargo is noteworthy and air traffic in terms of cargo throughput will no doubt grow significantly in the new Region, with India and China's booming economy and the upcoming Olympics 2008. For example, in the first 11 months of 2006 cargo traffic was increased by 6.3%. First of all, the market of air cargo in Korea grows very quickly and diversifies. It is an essential factor in the process of development of Northeast-Asia as a hub for Air Cargo logistics. However the process of air cargo in Korea is complex as compared with other north-east asia nations. At the same time, it has many problems and causes inconvenience to owners of freight. This paper investigated the process of air cargo in Korea now and analyzed problems of the process. We emphasize that 4PL is the excellent solution from among many alternatives. It is also worthy of notice that EPCglobal network strengthen the role of 4PL. In conclusion, the 4PL system based on EPCglobal network will result in a good success, so it will raise a prestige of air cargo in Korea to a higher position.

• 설비공학논문집
• /
• 제10권2호
• /
• pp.227-237
• /
• 1998

A numerical simulation has been carried out for the automotive air conditioning system. The purpose of this simulation is to present the methods for simulating car air conditioning components, systems and cool-down performance by computerized mathematical model and to analyze the performance of A/C system. In analyzing the heat exchanger(evaporator and condenser), the finite volume model which has a merit in predicting the temperature field in detail because it can consider partial variation of thermal property and heat transfer coefficient is used. In analyzing the compressor, the polytropic approach which regards the actual compression process as a reversible polytropic process is employed. In analyzing vehicle passenger compartment, the thermal network is employed to simulate the car cool down process. This A/C system program can be used for analyzing a component performance when a component is alternated or designed and for analyzing the engine cooling system when A/C system is operated.

• 한국산업융합학회 논문집
• /
• 제5권3호
• /
• pp.213-218
• /
• 2002

Total nitrogen is a major pollutant which mostly causes eutrophication and red tide. Wastewater effluent from printing of cotton-viscose rayon containing high concentrations of total nitrogen can not be effectively treated with a typical biological treatment process. This paper provides a new treatment process and experimental results for the removal of high strength nitrogen from dyeing wastewater. The optimum conditions of air stripping for the removal of total nitrogen include around pH 12, temperature $60^{\circ}C$ with 60 minutes of stripping time. In case of a filtration-air stripping process, an initial level ($500mg/{\ell}$) of total nitrogen was significantly reduced to below $60mg/{\ell}$. Deconite was synthesised for further decomposition of organic nitrogen. Thus, a filtration-decomposition-air stripping process was possibly achieved, by which a high level ($900mg/{\ell}$) of total nitrogen was effectively removed to below $60mg/{\ell}$ P. Finally, a continuous new process for the removal of total nitrogen is proposed and confirmed, based on batch experimental results, and its process validity is further discussed throughout.

• 대한안전경영과학회지
• /
• 제9권6호
• /
• pp.147-154
• /
• 2007

We must adapt to the rapid speed of information-oriented society well for outstanding central logistics nation of 21th century's Northeast Asian. Moreover, we must provide customers or enterprises with sufficiently satisfactory service about diversified desire of customers. In particular, we try to find the service process with RFID about air logistics that has many demands and is required to develop accurate and rapid service technique. As a result, we apply RFID to overall process of air logistics. After that, we will test the process and analyze results of the test. We are going to provide real possibilities of RFID enterprise and other service process. We will promote technology development of service process for air logistics' service.

• 동력기계공학회지
• /
• 제14권6호
• /
• pp.54-60
• /
• 2010

The automotive air conditioning hose is used for connecting the components of air conditioner in a vehicle. The hose is usually manufactured by the swaging process to connect the rubber hose with the metal fitting at the end of the hose. The swaging process leads to various stress and strain configurations in the hose, which give a critical effect on the hose performance. In this paper, the deformation characteristics of an air-conditioning hose during the swaging process were analyzed using the nonlinear finite element method. Especially the rubber layers, which are contacted with the metal fittings, were divided with finer mesh density than the reinforcement braids to increase the solution accuracy. The material properties were obtained from experimental data, and the contact conditions were used in consideration of the real manufacturing process.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2008년도 추계학술대회
• /
• pp.555-560
• /
• 2008

Air logistics is getting growing continuously because customers need to increase rapidity and accuracy, but it isn't enough to study the process about air logistics in South Korea. We analyze the AS-IS process and problems by studying previous documents and researching in this field. We offer how to adopt the ways that are solutions concerning AS-IS process and benchmarking e-freight of IATA. Our suggestion reduces stakehoders' work load by using integrated system. We believe it will contribute to improve air logistics process by making simple the process.

• 통상정보연구
• /
• 제14권3호
• /
• pp.559-583
• /
• 2012

본 연구는 인천국제공항이 국제항공화물운송에 있어서 동북아의 중심이 되기 위하여 국제물류주선업자의 국제항공화물운송 프로세스의 문제점과 애로요인, 개선사항 등을 조사 및 분석해보는 것이 필요하다는 전제하에 수행되게 되었다. 국제항공화물운송 프로세스의 여건은 수출 및 수입으로 구분하여 개별 프로세스별 소요시간과 만족도 그리고 프로세스 단계별 문제점을 분석하였다. 그 결과 국제항공화물운송 수출프로세스의 소요시간이 수입프로세스의 소요시간 보다 약 1시간 더 소요되는 것으로 나타나 국제항공화물운송의 프로세스를 개선하기 위해서는 수출보다는 수입부문의 프로세스 개선이 시급한 것으로 나타났다. 또한, 이상의 사항을 종합하여 항공화물 정보시스템 구축, 화물조업의 경쟁력 확보, 물류표준화 개선 등이 향후 개선되어야할 과제로 도출하였다.