This study selected two labor-intensive processes in harsh environments among domestic food production processes. It analyzed their improvement effectiveness using 3-dimensional (3D) simulation. The selected processes were the “frozen storage source transfer and dismantling process” (Case 1) and the “heavily loaded box transfer process” (Case 2). The layout, process sequence, man-hours, and output of each process were measured during a visit to a real food manufacturing factory. Based on the data measured, the 3D simulation model was visually analyzed to evaluate the operational processes. The number of workers, work rate, and throughput were also used as comparison and verification indicators before and after the improvement. The throughput of Case 1 and Case 2 increased by 44.8% and 69.7%, respectively, compared to the previous one, while the utilization rate showed high values despite the decrease, confirming that the actual selected process alone is a high-fatigue and high-risk process for workers. As a result of this study, it was determined that 3D simulation can provide a visual comparison to assess whether the actual process improvement has been accurately designed and implemented. Additionally, it was confirmed that preliminary verification of the process improvement is achievable.

This study develops a new device system for measuring a slope of object with non-adhesive, non-contact and non-face-to-face, namely Inclinometer Slope Laser Measuring (ISLM), that is applicable in the field. This system includes cradle, laser, camera, and computer and the filming and is performed after laser projection at programmed intervals. After measuring the amount of displacement converted to numerical values, these values can then be transferred to the office using the selected data transmission method. The obtained results from the test carried out to verify the reliability of the ISLM system indicated that the ISLM system can measure with accurately level of 0.1mm/Pixel at 1m distance and when increasing the camera resolution, the precision might increase proportionally. Therefore, the proposed measure system may widely apply on-site for various constructions, especially, in the case of object with very high surface temperature where exhibits difficulty to directly measure the adjacent structures. However, due to the sensitive reaction to the illuminance, this method can be applied with caution at times of large changes in illuminance, such as at dawn and at dusk.

방울토마토는 냉·한대 지역을 제외하고는 세계적으로 생산 및 소비되는 채소로 수확 후 품질관리 등에 대한 연구가 많이 이루어지고 있다. 본 연구에서는 비파괴 측정 방법들 중 하나인 자기공명영상(Magnetic Resonance Imaging, MRI)기술을 활용하여 방울토마토의 품종 및 성숙단계별 과실 내부 구조의 변화를 비교하였다. 공시재료는 방울토마토 3품종(티아라, 티아라_TY, 유니콘)에 대하여 성숙단계를 과피색을 기준으로 6단계로 세분화하고 3반복으로 MRI 영상을 획득하였다. 실험은 전북대학교 부설 농업기계 ICT 융합 연구소가 보유하고 있는 MRI 시스템을 활용하여 이미지를 얻었다. 자기공명영상 이미지는 Gradient Echo 펄스열을 사용하였고, 횡단면(Axial)의 영상면(Image Direction)을 중심으로 영상영역(Field of View, FOV)은 50 mm x 50 mm로 1회 촬영할 때마다 20개의 영상들을 얻었다. 촬영하여 얻은 영상들과 직접적으로 비교하기 위해 영상면과 같은 방향으로 임의적으로 방울토마토의 중간을 칼로 잘라 비교하였다. 촬영과 실제 잘라 내부를 비교해본 결과, 방울토마토 내부 심실의 수는 다른 품종들에 비해 티아라 품종이 가장 많았다. 생육단계별로는 3품종 모두 마지막 단계(Red Stage)의 중과피의 형태가 뚜렷하게 구분되지 않았으며, 특히 유니콘품종의 경우 다른 품종들에 비해 더 빠르게 모호해지는 것을 알 수 있었다. 또한 유니콘 품종의 경우, 다른 두 품종에 비해 미숙단계인 1,2단계(Green Stage, Breaker Stage)에서 중과피의 형태가 빠르게 발달하는 것이 확인되었다. 본 연구를 통하여, 방울토마토와 같이 성숙단계별 내부 변화가 크게 일어나는 과실에 대하여 비파괴 자기공명영상으로 분석함으로써 재배 환경조건에 따른 품종별 내부 생리장해 및 형태의 신속한 변화 탐지에 효율적으로 활용될 수 있는 가능성을 확인하였다.

In the ALC(Autoclaved lightweight concrete) manufacturing process, if the pre-cured semi-cake is removed after proper time is passed, it will be hard to retain the moisture and be easily cracked. Therefore, in this research, we took the research by multiple regression analysis to find relationship between variables for the prediction the hardness that is the control standard of the removal time. We study the relationship between Independent variables such as the V/T(Vibration Time), V/T movement, expansion height, curing time, placing temperature, Rising and C/S ratio and the Dependent variables, the hardness by multiple regression analysis. In this study, first, we calculated regression equation by the regression analysis, then we tried phased regression analysis, best subset regression analysis and residual analysis. At last, we could verify curing time, placing temperature, Rising and C/S ratio influence to the hardness by the estimated regression equation.

Rodents, specially rats, can recognize distance and shape of an object and also pattern of the textures by using their whiskers. Mechanoreceptors surrounding the root of whisker in their follicle measure deflection of the whisker. Rats can move their whisker back and forth freely. This ability, called active whisking or active sensing, is one of characteristics of rat behaviours. Many researches based on the mechanism have been progressed. In this paper, we test a simple and accurate method based on deflection of the whisker: we designed biomimetic whiskers modeling after a structure of follicle using the microphone. The microphone sensor measures a mechanical vibration. Attaching an artificial whisker beam to the microphone membrane, we can detect a vibration of whisker and this can show the deflection amount of whisker indirectly.