• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.32 no.2
• /
• pp.179-185
• /
• 2009

공공사업이나 자동화 생산시스템 등에 있어서 설비 자산이 차지하는 비중은 매우 크며 이러한 설비들의 경제적 설비 대체 분석을 위하여 설비에 대한 수명분석이 이루어져야 한다. 본 논문에서는 설비들의 폐기 자료가 불충분한 경우의 수명분석에서 Iowa형 생존곡선을 기초로 한 CM 방법을 제시하였다. 기존의 SPR 방법이 평균 수명만을 추정하는데 비하여 제시된 CM 방법은 설비의 수명분포를 추정함으로써 평균 수명뿐만 아니라 폐기 자료의 폐기곡선과 폐기율을 추정할 수 있어 설비 교체 분석 시 유용하게 사용될 수 있다.

• Journal of Radiation Industry
• /
• v.6 no.2
• /
• pp.181-188
• /
• 2012

A mushroom mutant with increased cellulolytic activity was developed through radiation mutagenesis. The homogenized hypha suspension of Pleurotus florida was exposed to gamma radiation ($^{60}Co$, AECL) at the dose of $LD_{99}$ (0.51 kGy, $D_{10}$; 0.26 kGy). Among 16 mutants, Pf CM4 showed 17.24% more cellulolytic activity than the wild type (p<0.05). It was observed that Pf CM4 can utilize all kinds of carbon sources tested for their mycelia growth. Starch, xylan, and glucose favourably supported the radial mycelia extension. Yeast extract and $NH_4NO_3$ have been recorded as the best organic and inorganic nitrogen sources, respectively. Pf CM4 was found to grow significantly faster, even at high temperature ($30^{\circ}C$), than wild type (p<0.05), and the optimal pH was 5.5~6.5. This study reveals that the mutant Pf CM4 could be employed for the effective recycling of cellulosic wastes, in addition to mushroom farming.

• Journal of Korea Society of Industrial Information Systems
• /
• v.26 no.5
• /
• pp.37-54
• /
• 2021

In this study, a customized model (CM) for the efficient operation of cold chain logistics considering the hypergeometric distribution is proposed. The CM focuses on the segmentation market of ready-to-eat foods and juices made from fresh materials. Companies should determine the amount of production by predicting consumer preferences and quantity to ensure high-efficiency production. The CM is represented as a mathematical formulation and implemented using the genetic algorithm (GA). Addition, the relative weights of CM are calculated. Further, the calculated weights are applied to the GA. In the numerical experiment, hypergeometric distribution is used to calculate the relative weights between the range of production quantities and the customized amount. Experiment results are the values of relative weights and the comparison results by average values of handling cost, total cost and CPU time. Finally, the significance of this study is summarized and a future research direction is remarked in conclusion.

• Journal of Korean Institute of Industrial Engineers
• /
• v.24 no.2
• /
• pp.167-173
• /
• 1998

Many workers like welders work in squatting postures with the object on the ground during an entire work shift. It is suspected that such prolonged squatting without any supporting stool would gradually cause musculoskeletal injuries to workers. This study is to examine the physical stress caused by the prolonged squatting and to recommend a safe work/rest schedule for a welding task with squatting posture based on the lab experiments. In this study, 8 healthy student subjects participated in the experiment. They maintained a squatting work posture for 16 minutes with 4 different stool height conditions: no stool; 10cm height; 15cm height; and 20cm height. Every 2 minutes, the discomfort was subjectively assessed with the magnitude estimation method for the whole body, lower back, upper leg and lower leg. Based on discomfort ratings, we found that a 10cm height stool relieved the workload most. Discomfort rating results also indicated that a 20cm height stool showed the highest workload, and the there were no difference in workload between a 15cm height stool and no stool. We recommend to use low height stools and to maintain such working postures no longer than 6 minutes for prolonged squatting tasks.

• Fashion & Textile Research Journal
• /
• v.17 no.1
• /
• pp.93-101
• /
• 2015

This study aims to suggest the patternmaking method of men's slim-fit six-panel jacket sloper in their 30's. The researcher collected four kinds of existing slopers and carried out appearance evaluations twice. The researcher's sloper was developed by modifying and supplementing the existing sloper with high scores from the evaluations. The results are as follows: first, when comparing the four kinds of existing slopers, dimensions and patternmaking methods of 18 areas, especially width of back chest and side chest, were varied according to the existing slopers. Second, the researcher's sloper had excellent scores in the appearance evaluations such as placements of side line on the chest, waist, hip line, measurement in dimension from the center back hip line and from waist line, and appearance of neck line. Third, the suggested sloper are as follows: the ease on the chest is 10.5 cm, 8~10 cm extends for the jacket length, the measure in dimension from the back waist is 2.2 cm, dart intake at the back side is 4 cm, dart intake at the front side is 1.5~2 cm, and dart intake at the front waist is 1 cm. This suggested six-panel jacket sloper is expected to be useful for the various slim-fit jacket designs which have the side panels.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2004.11a
• /
• pp.433-436
• /
• 2004

Since construction management(CM) was recognized as a formal procurement route by law in 1995, it is interesting to observe the trend of its increasing adoption. Particularly in the public sector, local government clients more adopted the CM Procurement route than central government clients. The objective of this paper is to investigate and analyse the motivation of local government clients in selecting the CM procurement route. It is important to understand such motivation for achieving a better understanding of public client's CM needs and for promoting CM business in the public sector.

• Construction Engineering and Management
• /
• v.18 no.4
• /
• pp.3-7
• /
• 2017

• Korean Journal of Construction Engineering and Management
• /
• v.1 no.4 s.4
• /
• pp.91-97
• /
• 2000

Construction Management(CM) has been introduced in Korean Construction Industry for its merits and benefits proven in International Construction Industries. However, many regulations, standards, manuals and details of practices considering its constituents and industry conditions have not yet to be developed. Of these, the standards and details of CM fee calculation should be developed in order to stretch its application toward public construction sectors as well as the private sectors. This research proposes CMFM(Construction Management Fee Model), a project sensitive matric CM fee model for CM fee calculation. The model calculates CM fees for modular services in a two by two matrix taking project phases on one dimension and CM services on the other.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2006.11a
• /
• pp.554-558
• /
• 2006

Construction Industry has become bigger, sophistication and specialization. At the same time, the concerns of Construction Management for achieving the goal of quality, cost & air are getting higher. Therefore it is demanded technology to conduct the CM works continuously in the Industrial world and be in process of education to train specialists. Studies are also been doing for it. But infrastructure circumstances are insufficiency comparing with the interests of construction industry. It is needed the scheme of education system to improve the above mentioned problem and to raise education quality standards. Consequently, the study is for E-learning education system. Because this system can help to save cost and to overcome the limits of time and spaces for existing off-line education. The study will present e-learning system architecture model to activate Construction Management education considering the distinctive features of CM.

• Korean Journal of Ichthyology
• /
• v.35 no.3
• /
• pp.177-182
• /
• 2023

Total 158 Conger myriaster were examined and the range of Preanal length (PaL) was 8.2~40.1 cm and average Preanal length was 17.3 cm. Proportion of the empty stomach was 30.4% and individuals, which the prey items were found in stomach, were 110. The most important prey component in the diets of C. myriaster was Pisces that constituted 54.4% in %IRI (Index of relative importance). Engraulis japonicus was the most important prey component in Pisces. Macrura was the second largest prey component and Crangon hakodatei was the most important prey component in Macrura. The result of analysis in ontogenetic changes significantly exhibited among three size classes (<15.0 cm, 15.0~20.0 cm, ≥20.0 cm). The proportion of Macrura decreased as increasing body size, whereas the consumption of Pisces increased gradually. As body size of C. myriaster increased, the mean weight of prey per stomach (mW/ST) increased (one way-ANOVA, P<0.05).