This study was designed as the precedent research to develop improve the HMR type flavored cooked rice, by analyzing the consumer perception and purchase pattern. This will in turn provide base data to that will help in the development of products that meet consumer’s convenience and quality demands. An online survey of 247 people (63.5%) in the age of 20 to 60 was conducted on January 2019. For the primary reason of buying those products, the survey respondents chose a convenience of 71.7%. They are likely to buy 1~2 times a month (40.5%) in hypermarkets (63.6%). The channel choice showed meaningful difference between segments (p<0.01). 89.1% of respondents replied that they are willing to purchase frozen flavored cooked rice in the future. The Key Purchasing factor appeared to be the flavor (5.80), while nutrition (4.89) was chosen as the least important factor. For flavor preference, sea food received the highest score (5.05), while radish kimchi flavor received the lowest (4.02) with a meaningful difference by gender and age (p<0.01). Consumers who sought nutrition, convenience and adventure in HMR products had higher willingness to re-purchase. Developing healthy, flavorful, sensory, and enjoyable HMR products will be critical in the fulfillment of diverse consumer needs.

The growing logistics strategy of a company is to optimize their vehicle route scheduling in their supply chain system. It is very important to analyze for continuous pickups and delivery vehicle scheduling. This paper is a computational study to investigate the effectiveness of continuous pickups and delivery vehicle routing problems. These scheduling problems have 3 subproblems; Inbound Vehicle Routing Problem with Makespan and Pickup, Line-haul Network Problem, and Outbound Vehicle Routing Problem with Delivery. In this paper, we propose 5 heuristic Algorithms; Selecting Routing Node, Routing Scheduling, Determining Vehicle Type with Number and Quantity, and Modification Selecting Routing Node. We apply these Algorithms to S vehicle company. The results of computational experiments demonstrate that proposed methods perform well and have better solutions than other methods considering the basic time and due-date.

This paper focuses on scheduling problems arising in the military. In planned artillery attack operations, a large number of threatening enemy targets should be destroyed to minimize fatal loss to the friendly forces. We consider a situation in which the

This dissertation focuses on scheduling problems arising in the military. In planned artillery attack operations, a large number of threatening enemy targets should be destroyed to minimize fatal loss to the friendly forces. We consider a situation in which the number of available weapons is smaller than the number of targets. Therefore it is required to develop a new sequencing algorithm for the unplanned artillery attack operation. The objective is to minimize the total loss of the targets, which is expressed as a function of the fire power potential, after artillery attack operations are finished. We develop a algorithm considering the fire power potential and the time required to destroy the targets. The algorithms suggested in this dissertation can be used in real artillery attack operations if they are modified slightly to cope with the practical situations.

본 연구에서는 무구속, 무자각, 무침습적인 패치형 심장활동 모니터링 시스템(HAMS)을 개발하였다. 이 심전도 모듈은 무선 통신을 사용하여 신호를 컴퓨터로 전송 받아 실시간으로 피검자의 심장 활동 상태를 언제 어디서나 장시간 동안 손쉽게 모니터링 측정할 수 있는 이동성을 갖추고 있다. 가슴에 부착이 가능한 패치 타입의 소형 전극을 자체 제작하였고, 측정된 심전도 신호에 대한 신뢰성 검증이 이루어졌다. HRV에 대한 스트레스의 영향을 평가하기 위하여 HAMS을 이용하여 동일한 피험자를 대상으로 HRV 파라미터와 불안, 스트레스 항목에 대한 설문지 평가, 스트레스 호르몬(코티졸)양을 측정하였다. 일상 상태와 스트레스 상황에서의 값들을 비교한 결과, 많은 파라미터에서 유의미한 차이가 나타났다. 또한 피어슨 상관계수로부터 스트레스와 상관성이 높은 파라미터를 검토하였다. 이는 HAMS를 이용하여 자율신경계 기능 평가가 충분히 가능하다는 것을 보여주는 것이다. 이러한 결과로부터 HAMS를 통하여 일상생활에서 심장 이상을 예측할 수 있으며, 건강 모니터링 시스템으로 활용도가 높을 것으로 기대된다.

  Recently, the increasing trend for the transshipment traffic of Busan port in Korea is slowing down because of the extensive development plan of domestic ports in china. For solving this problem, Korea is going on the project for preoccupying the transs

  It has been a major issue to repair the broken system quickly for improvement of productivity and utilization. Generally, high utilization of system requires the high amount of spare parts in inventory and inventory cost. Therefore, it is necessary to d

CSP(Concurrent Spare Parts) is supplied with the procurement of new equipment or weapon system and is used to sustain the equipment without resupply during the initial coverage period. This study is concerned with a problem of determining the near optimal inventory level of the spare parts, especially Concurrent Spare Parts. For this, we utilize the mixed periodic and continuous review polices considering the CSP and (r,Q) Policies concurrently in a two-echelon distribution system. We propose the mathematical model to minimize the total cost which is composed with ordering cost, purchasing cost, holding cost, and stickout cost. If the mixed policy is compared to other policies(CSP, (r,Q)), the proposed methodology performs well and is best policy in the equipment maintenance expenses.

The odor emission characteristics in a food waste treatment plant, in terms of odor active compounds and odor unit concentration, were evaluated using an air dilution method and instrumental analysis method, respectively. A GC/MS analysis of the emission source was also carried out to investigate the effect of waste polymer incineration on the formation of organic materials. The result, as evaluated using the instrumental analysis method, showed that ammonia, acetaldehyde, dimethylsulfide and propionaldehyde were detected in high amounts from the outlet at "A" food waste treatment plant. The major odorous compounds, however, were acetaldehyde and metylmercaptan, which were derived using an odor quotient method. Limonene, benzene and toluene were also detected from the GC/MS analysis of the emission source. The criteria were 500 at the final outlet, 15 at the site boundary line, but the observed results were 10000 and 30, respectively.

Recently, a matter of the highest priority that the company must do for the satisfaction of customer service is that the company ensure the competitive power throughout the strategic cooperation in the market environment changing rapidly. In this situation, one of allied strategies is the supply chain management strategies. This paper suggests how to increase customer service and to decrease inventory throughout construction of the inventory sharing system among networked company. For this, we experimented the effect of the inventory information sharing system on the supply chain dynamics by using the simulation modeling and analyzed the validity about construction of the inventory sharing system presented in this study. The simulation is designed by Vensim(Process simulation package) and has some feedback loops.

A series of studies on determining optimal quantities of CSP(concurrent spare parts) were conducted by many researchers. but most of them are focused on system availability model. On this study we'll introduce the weighting rate of each CSP to find a solution to optimal quantities of CSP which are acquired for using considerably long time. As the weighting rate, the concept of NORS(Not Operationally Readiness Supply) was used. To solve the problem, this paper proposes a new CSP model which can be used in permitting backorder flexibly. Through the simple experiment, we validated the mathematical model which was suggested in this paper. Also, we determined the purchasing quantities of each item minimizing total system costs under an available budget constraints.