High luminance LED fluorescent light is replaced by halogen light in recent light parts. The housing cover of LED fluorescent light is used many several materials. Though deformity character has less value, polycarbonate cover has cheap, high strength and it is used general purpose. This study is several purposes. 1. No entering foreign matters during continuous extrusion manufacturing process in cutting process, 2. No deformity, exact cutting of pc length and finding method of cutting manufacturing process for polycarbonate cover

The dual effectiveness of Opuntia ficus indica extracts for browning inhibition and microbial inactivation on fresh-cut apples was investigated. Prepared apple slices were treated with 25, 50, 100, 200 mg/mL Opuntia ficus indica extracts, packaged in polyethylene bags, and stored for 10 days at 4, 21oC. Results indicate that Opuntia ficus indica extracts significantly (P < 0.05) inhibited the browning reaction of fresh-cut apples. This treatment also reduced peroxidase activities. The populations of Staphylococcus aureus significantly decreased with increasing extract concentration (p < 0.05). In particular, S. aureus was reduced to non-detectable levels after 2 days in 100 mg/mL treatment at 4oC and 21oC. Opuntia ficus indica extracts therefore have antibacterial and antibrowning effects. The results suggest that Opuntia ficus indica extracts could be useful as a natural food preservative.

국내에서 육성된 딸기 품종인 '매향' 및 '설향'을 대상으로 비가림 포트 육묘 시 런너의 절단 시기에 따른 자묘의 생육과 정식 후 수량을 2작기(2009년 및 2010년)에 걸쳐 검토하였다. 자묘는 정식일(2009년 9월 11일 및 2010년 9월 10일)을 기준으로 30일, 20일, 10일 및 5일 전에 모주로부터 런너를 절단하였다. 런너의 절단 시기가 늦을수록 모주에서 양수분이 육묘 후기까지 자묘로 공급되어 지상부 생체중, 관부직경 및 엽록소 함량은 증가하는 경향을 보였다. 반면에 근중 등 지하부 생육은 런너의 절단 시기가 빨라서 모주로부터 자묘의 독립 기간이 길수록 증가하였다. 모주에서 런너를 절단한 경우의 관수 요구량이 런너를 절단하지 않은 처리구에 비하여 29.7% 증가하였다. 또한, 런너를 절단하였을 경우에 런너를 통하여 탄저병이 침입한 경우가 런너를 절단하지 않은 처리구에 비하여 37.6% 높게 나타났다. 정식 후 정화방의 출뢰 및 개화 개시기는 런너 절단 시기가 늦을 경우 2~3일까지 지연되었으나 런너 절단 시기에 따른 조기 수량의 차이가 없으므로 런너 절단 시기를 정식일의 5~10일 전인 8월 하순 이후로 늦추어 실시하는 것이 탄저병 발생 경감 측면에서는 유리한 것으로 생각된다.

The research discusses interrelationship of structural and reliability importance measures which used in the probabilistic safety assessment. The most frequently used component importance measures, such as Birnbaum's Importance (BI), Risk Reduction (RR), Risk Reduction Worth (RRW), RA (Risk Achievement), Risk Achievement Worth (RAW), Fussel Vesely (FV) and Critically Importance (CI) can be derived from two structure importance measures that are developed based on the size and the number of Minimal Path Set (MPS) and Minimal Cut Set (MCS). In order to show an effectiveness of importance measures which is developed in this paper, the three representative functional structures, such as series-parallel, k out of n and bridge are used to compare with Birnbaum's Importance measure. In addition, the study presents the implementation examples of Total Productive Maintenance (TPM) metrics and alternating renewal process models with exponential distribution to calculate the availability and unavailability of component facility for improving system performances. System state structure functions in terms of component states can be converted into the system availability (unavailability) functions by substituting the component reliabilities (unavailabilities) for the component states. The applicable examples are presented in order to help the understanding of practitioners.

Recent cross-country competition and Chinese steel industry because of the emerging steel industry in Korea is a very difficult situation. Therefore, the steel industry in order to overcome this difficult market environment, the quality, cost competitiveness, enhance customer service levels and enhance international competitiveness through is needed. In this study, the purpose of strengthening the competitiveness of steel companies in order and hit the recovery of raw materials have been developed to optimize the model, developed before and after the results were analyzed. In addition, when applied to other products in order to minimize risk and optimize cutting trial stage of development details of the model is presented in detail. Therefore, the developed model was applied to order the recovery of raw materials hits and significantly improved production planning time has been shortened dramatically. In the present study the contents of other products when properly applied and the competitiveness of companies to improve customer service levels are expected to be helpful.

5-axis laser cutting has great advantages when it is applied to three dimensional machining requiring high cutting quality. For developing 5-axis CNC laser cutting systems, however, many problems such as rotating a laser head or a working table, 5-axis se

Since 1970s, Artists have disfigured and destructed human being’sbody. They were trying to display the properties of matter of body itself asa vessel of spirit or soul. In the 1980s, bodily images are main concern formany artist due to spreaded threat of AIDS. This could be the trial toexplore the body’s identity in the process from the individual range tosocial range. At 1990s, Artists who have dealt dismembered bodies,including Robert Gober, Chapman Brothers, Kiki Smith, and DamienHirst, have exhibited fragmented body parts and organs such as blood,skin, and hair, etc. The dismembered body have functioned as the site forthe investigation of our urgent concern for sexual identity, homophobia,and social discrimination as well as disease and death.Modern artists have progressed themes for dismembered body with theirown motif and strategy and expanded the region of art, enlarging andcutting out the parts of body, or showing the inner organs. The range ofthe dismembered body is expanded into the inner parts of body due to thevisibility of surface. The blood is inevitably accompanied from the surfaceof skin by these outcomes. Though the bodily fluids, including the blood,pus and sperm etc., is not lowly, nor abject, the body fluidity had beentreated as excrement. The matters like blood evoke complex feelings offreight, cruelty. death, dirty, and contamination etc. In the 1990s, artists like Kiki smith, and Marc Quinn presented real blood, semen, and milkwith their images.The works of Gober, the Chapmans, Kiki Smith, and Hirst are based onthe resistance against the social contradiction while those of Giacomettiand Bourgeois are originated from their autobiographical experience.Consequently the fragmented bodily images turn out to be dynamiccategories instead of representing the ideal body image. Completeness,perfection, and wholeness, which had been the criteria since ancient Greekart, are not universal value any more.: Dismembered bodily images are theproper means for suggesting pain, violation, and suppression.

This paper studies the non-cutting optical fiber transmission tester, which can test the abnormality in the optical fiber core. The basic testing method, in the case of abnormality on the lines, can estimate the loss and other abnormalities by using optical power meter and stabilized laser source of light. The optical measurement wavelength of the system is the wavelength for communication of 1310, 1550nm, and can, in checking the abnormality on the communication lines, measure the optical in order not to affect the existing data communication network with the maximum loss of 0.5dB only. The break down can be diagnosed with the naked eyes by having red laser diode with optical power of 0.5mW(-3dBm) built-in.

This paper considers a problem of optimizing torch paths to cut stock plates nested with open contours. For each contour, one of the two ending points is to be selected as a starting point of cutting with the other being the exit point. A torch path is co

Recently, the automatic laser-piercing has become a subject of growing research area in the hydroforming of car body and robotic fields. Generally, the laser-cutting with 6-DOF robot system has 3D error due to a gear backlash and inaccurate calibration method between sensor and cutting-tool. The objective of this article is to study the automatic laser-cutting for the micro-hole piercing of engine cradles. The development of redundant micro-control module and laser vision sensor contributes to the implementation of precise laser cutting. To obtain higher a performance of control module, the calibration algorithm between cutting-tool and laser sensor is required. The implementation of this methodology will be describe. The optimal path generation for a good quality of cutting section is also explained in detail. The experimental results demonstrate the successful operation in the automatic micro-hole piercing. It shows a validity of the micro-motion mechanism and robot‘s calibration algorithm in laser sensor.

In this paper, a best-first branch and bound algorithm based upon the bottom-up approach for the unweighted unconstrained two-dimensional cutting problem is proposed to find the optimal solution to the problem. The algorithm uses simple and effective meth

This paper investigates the optimal nesting system for a board. A hybrid method is used to search the optimal solution for rectangular nesting problem. This method is composed of heuristic approach algorithm. An engineer's experience of board nesting in which a loss occurred to sheet because of various individual error and diffidence. So, item layout at resource sheet were evaluated in engineering algorithm logic in which specially designed was installed. The nesting system consists of Lisp and Visual Basic. The system was controlled by AutoCAD so as to best item batch path test.

This paper investigates the optimal nesting system for a board. A hybrid method is used to search the optimal solution for rectangular nesting problem. This method is composed of heuristic approach algorithm. An engineer's experience of board nesting in which a loss occurred to sheet because of various individual error and diffidence. So, item layout at resource sheet were evaluated in engineering algorithm logic in which specially designed was installed. The nesting system consists of Lisp and Visual Basic. The system was controlled by AutoCAD so as to best item batch path test.