Melon fruits exhibit a wide range of morphological variations in fruit shape, sugar content, net quality, diameter and weight, which are largely dependent on the variety. These characteristics significantly affect marketability. For netted varieties, the uniformity and pattern of the net serve as key factors in determining the external quality of the melon and act as indicators of its internal quality. In this study, we evaluated the effect of fruit morphology and growth on netting by analyzing the changes in melon fruit quality under LED light treatment and monitoring fruit growth. Computer vision analysis was used for quantitative evaluation of fruit net quality, and a three-variable logistic model was applied to simulate fruit growth. The results showed that melons grown under LED conditions exhibited more uniform fruit shape and improvements in both net quality and sugar content compared to the control group. The results of the logistic model showed minimal error values and consistent curve slopes across treatments, confirming its ability to accurately predict fruit growth patterns under varying light conditions. This study provides an understanding of the effects of fruit shape and growth on net quality.

The blockage rate for three kinds of nets commonly used in agricultural facilities was assessed by using the image acquisition and its relevant processing. By using both empirical relations presented by Idel’chik and Richards and Robinson, and the blockage rate obtained from the image processing, the pressure drop through the nets was predicted and also compared with wind tunnel experiment results. The results of the study showed that the blockage rate of the net was discriminated according to such factors as the magnitude of nets, the existence of inside threads, the thickness and number of threads. In addition, the blockage rate for the incident angle of 0° when the wind blew at the front had the range of 0.22－0.29 (0.22－0.32 when considering whole incident angles from 0° to 45° by 15°). For the nets with the blockage rate of about 30% or below, the prediction by the empirical relations of by Idel’chik and Richards and Robinson showed a little higher pressure drop overall than that of the wind tunnel test, but the use of the empirical relations and the blockage rate could be thought of as providing effectively meaningful guidelines for the safe design of agricultural facilities including nets because the wind tunnel test has been tedious and expensive. Further research and potential application on the prediction technique of the pressure drop, regarding both a subtle deformation by the wind and manufacturing methods with regard to the level of knots and the existence of inside threads, needs to be done for the nets with higher blockage rate.

This paper is intended to explore the otherness of ‘non-mainstream’ graduate students specializing in applied linguistics at various departments of English language and literature in Korea. Drawing on Honneth’s theory of recognition and its ideology, it attempted to understand the way their ‘professional identities’ are constructed both within and without the related academic communities. Through interviews and reflection journals, the lived stories of research participants illustrated that their trajectories of growth were not a transmission of knowledge and skills in applied linguistics, and that Honneth’s threefold conceptualization of intersubjective recognition (love, rights, solidarity) was usefully applied to the sociopolitical inquiry of ‘becoming professional.’ They did not feel a sense of affection, were not respected as rights-holders, and did not have mutual esteem and solidarity. The non-mainstream students strived for recognition in the graduate program by voicing their emotions in their qualitative research papers and improving their limited proficiency of English which, however, led to ‘uncritical’ conformity. They lost the emancipatory struggle for their independent and scholarly selves. The model of mutual recognition is expected to show good potential as an analytic tool for understanding the motivational and justificatory basis for social struggles. Further research is suggested to examine how Honneth’s theory can help in understanding people in different disciplines.

호소 생태계에 대한 생물측정망 조사 및 평가지침은 동물플랑크톤 조사의 편의성을 고려하여 출현 종 수와 개체 군밀도, 군집 지수 등을 상대적으로 비교하기 위해 수심 5 m 이하의 얕은 호소-수변부에서 사선끌기, 수심 20 m 이상 호소-전수심 수직끌기, 그 이상의 깊은 호소-20 m까지의 수심을 대상으로 한 수직끌기를 제시하고 있다. 본 연구에 서는 지침에서 제시하는 방법 중 사선끌기법과 20 m 수직 끌기법을 각각 전수심을 대상으로 한 조사 방법과 비교하여 동물플랑크톤 군집 정보의 차이 및 특성에 대해 분석 하였다. 군집 지수의 경우 수심이 얕은 호수에서의 사선끌 기법/수직끌기법 비교에서는 차이를 보이지 않은 반면, 수 심이 깊은 호소에서는 끌기 수심을 20 m로 제한할 경우보다 전수심 수직끌기를 적용했을 때 다양도 및 풍부도 지수 가 상승하는 것으로 나타났다. 또한, 사선끌기 및 20 m 수직끌기를 통해 채집한 동물플랑크톤 시료로부터 표면~저층 상층부까지의 전수심을 채집 대상으로 설정한 경우보 다 약 3배 정도 높은 개체군 밀도가 계산되어, 동물플랑크톤 총 개체 밀도가 크게 과대 평가되는 것으로 나타났다. 이러한 차이는 동물플랑크톤 수직 분포 특성상 발생하는 수층별 동물플랑크톤 개체 밀도 차이 및 여과된 원수량의 차이에서 비롯된 결과로 판단되며, 이에 따라 호소를 대변 하여 수체 간 또는 수체 내 변동을 보다 정확히 파악하고 호 내 2차 생산과 관련한 기능적 정량 지표로서 동물플랑크톤 군집 정보의 활용을 고려할 경우, 수심에 따른 개체 군밀도 분포와 전체 개체수 환산 시 수층별 기여율을 고려한 전수심 수직끌기 방법의 적용이 보다 적절할 것으로 분석되었다.

Cable network system is a flexible lightweight structure which curved cables can transmit only tensile forces. The weight of cable roof dramatically can reduce when the length becomes large. The cable network system is too flexible, most cable systems are stabilized by pretension forces. The tensile force of cable system is greatly influenced by the sag ratio and pretension forces. Determining initial sag ratio of cable roof system is essential in a design process of cable structures. Final sag ratio and pretension depends on initial installed sag and on proper handling during installation. The design shape of cable system has an affect on the sag and pretension, and must be determined using well-defined design philosophy. This paper is carried out the comparative data of the deflection and tensile forces on the geometric non-linear analysis of cable network systems according to sag ratio. The study of cable network system is provided to technical informations for the design of a large span cable roof, analytical results are compared with the results of other researchers. Structural nonlinear analysis of systems having cable elements is relatively complex than other rigid structural systems because displacements are large as a reason of flexibility, initial prestress is applied to cables in order to increase the rigidity, and then divergence of nonlinear analysis occurs rather frequently. Therefore, cable network systems do not exhibit a typical nonlinear behavior, iterative method that can handle geometric nonlinearities are necessary.

This study investigates the application of a synthetic resine based net-hose system to sustain vegetated embankment slope reinforcement. The net-hose system is designated to improve water supply to the vegetation that can suffer the lack of water in case of extreme drying condition or rock slope where water supply is relatively insufficient to ensure the growth of vegetation. A series of laboratory tests were conducted to check the structural adequacy and effectiveness of net-hose system. The results indicated that the model slope equipped with net-hose system seemed to provide better water supply resulting in more vegetated areas and higher matric suction due to active water uptake capacity, which might be contributed to greater shear strength of slope surface. A limited numerical analysis was conducted to verify the effect of water uptake on vegetated root system that generally yields better slope stability.

The study aims at a selective effect of the Grid and Window net in the shrimp beam trawl.The experimental trawling of the Proto type, Grid type and Grid and Window net type was performed in a sea area of Geo–je and Tong–yeong from Mar, 2006 to Apr, 2010. The obtained results are as follows; Catch per unit area (Number) of the Proto type net and Grid type net were 0.18/m2, 0.23/m2, respectively. The Grid type demonstrated 2.4% lower bycatch rate than the proto type (6.6% vs 4.2%, respectively). In addition, in terms of total weight, the bycatch rate of Grid type was 7.6% lower than the proto type (50.2% vs 42.6%, respectively). In the comparison of shrimp catch, the Proto type demonstrated better haul outcome (0.02 case/m2) than the Grid & Window type (0.02 case/m2). The Grid & Window net type demonstrated 16.4% lower bycatch rate than the Proto type (32.2% vs 48.6%, respectively). In addition, in terms of total weight, the bycatch rate of Grid & Window net type was 8.3% lower than the Proto type (85.9% vs 94.2% respectively).

In this paper, we present a serious game that can prevent elderly people from brain illness using natural finger interaction and Fumanet exercise. As population of elderly people has continually grown in our society, brain illness like dementia can be naturally observed, which makes treatment cost up rapidly. Hence, we propose Leap-Motion based serious game for elderly people, which uses natural finger motions to interact with game contents. In our approach, we enhance finger motion recognition rate by adding auxiliary conditions that is superior to ordinary Leap-Motion APIs. Finally, we have also carried out user study and quantitative analysis to verify our methods.

This study investigates the application of net-hose system to sustain a vegetated slope reinforcement. The net-hose system is designated to improve water supply to the vegetation that can suffer the lack of water in case of extreme drying condition or rock slope where the water supply is relatively insufficient to ensure the growth of vegetation. A series of laboratoy tests were conducted to check the structural adequacy and effectiveness of net-hose net hose system. The results indicated that the model slope equipped with net-hose system seemed to provide better water supply leading to more vegetated areas and higher matric suction due to active water uptake capacity, which might be contributed to greater shear strength of slope surface. A limited numerical analysis was conducted to verify the effect of water uptake of vegetated root system that generally yields better slope stability.

본 연구는 국화 재배온실에서 사용되고 있으면서 수작업 시 많은 노동시간이 요구되는 국화 유인네트를 대상으로 작업의 소요시간을 대폭 절감시켜 재배 작기를 증가시킴은 물론 국화재배용 유인네트의 베드를 기존 및 신축 국화재배 온실에 보급할 목적으로 네트의 베드를 설계한 후, 베드 및 기존 온실의 구조적 안전성을 검토하였다. 총 15종류의 부재에 대한 단면의 특성과 역학적 성질을 검토하고 각각의 부재에 대한 응력비를 검토한 결과, 이들 파이프 중 ∅38.1×1.7t와 ∅38.1×2.0t의 경우, 응력비는 초과하지 않았지만 처짐의 제한 값인 10mm를 초과하였으므로 응력비와 처짐의 제한 값을 모두 만족하는 최적 파이프는 ∅48.1×1.5t인 것으로 나타났다. 유인네트의 베드를 중방에 설치할 경우, 베드 하중, 풍하중 및 설하중 때문에 중방은 트러스로 설계되어야 안전한 것으로 나타났다. 중방을 트러스로 시공할 경우에도 풍하중 및 설하중이 작용하면, 베드의 유무에 관계없이 거창지역의 국화재배 온실의 경우, 기둥과 방풍벽에 발생되는 응력은 허용응력을 초과하기 때문에 적절한 보강이 필요한 것으로 나타났다.

  In this paper, we described the existing methodology of product safety analysis and proposed a Petri-nets based method to analyze product safety systematically. The proposed method can be used to find the defects of hardware/software and the error of hu

2002년 7월 1일부터 제조물 책임법(PL: Product Liability)이 시행되었다. 이에 대한 관심이 고조되면서 소비자 권리의 핵심 항목으로 제품 안전이 중요한 문제로 부각되고 있다. 본 연구에서는 제품의 안전분석을 위해 리스크의 정의와 제품 결함에 관해 살펴보았고, 제품 안전분석을 위한 방법으로 페트리 네트를 이용한 방법을 제안하였다. 이는 시스템의 하드웨어나 소프트웨어의 결함 뿐 아니라 사용자의 조작상황을 모델링함으로써 인간에 의한 오작동 원인도 파악할 수 있는 가능성을 제시하였다. 제품을 사용하는 사용자의 행동과 사용자의 조작결과에 따른 제품의 기능 동작상황을 페트리 네트를 이용해 모델링 및 분석을 수행해보고 그 결과를 결함수 분석 방법과 비교하여 그 장단점을 논의하였다.

In this study, the 'force density method' for shape finding of cable net structures is presented. This concept is based on the force-length ratios or force densities which are defined for each branch of the net structures. This method renders a simple linear 'analytical form finding' possible. If the free choice of the force densities is restricted by further condition, the linear method is extended to a nonlinear one. The nonlinear one can be applied to the detailed computation of networks. In this paper, the general inverse matrix is introduced to solve the nonlinear equilibrium equation including Jacobian matrix which is rectangular matrix. Several examples for linear and nonlinear analysis applied additional constraints are presented. It is shown that the force density method is suitable for form finding of cable net and the general inverse matrix can be applied to solve the nonlinear equation without Lagrangian factors.

1. 레이저변위계 및 x-y로봇을 이용하여 계측한 3차원 데이터를 컴퓨터실의 PC/AT에 데이터를 전송하고, Visual Basic(Microsoft)을 이용하여 프로그램화한 화상처리시스템에 의해 머스크멜론 네트의 추출과 그 특징을 확인할 수 있었다. 2. 시용 배양액농도 및 배양액 시용시기를 다르게 함으로써 네트의 높이 및 폭의 차이를 확인하는 것이 가능했다. 3. 머스크멜론 네트의 특징인 높이 및 폭은 시용 배양액농도에 따라서 각각 다르다는 것을 알 수 있었다. 배양액의 농도가 낮을수록 네트의 점유율은 낮아지고, 폭은 넓어지는 경향이 보였다.