• 한국정밀공학회지
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• 제19권6호
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• pp.155-159
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• 2002

This paper describes the development process of mosquito trap with the effect of air cleaning by using the substance-field analysis and evolution pattern of systems in the theory of inventive problem solving (TRIZ). We g(It the concept of the mosquito trap with mosquito attractants instead of mosquito reluctants such as mosquito stick coil and skin medicine with bad and toxic smell. The number of mosquitos traped by one trap near cattle shed per one night in summer, was over 10 thousands with some effects of air cleaning

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.556-559
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• 1997

This paper describes the development process of mosquito trap with the effect of air cleaning by using the substance-field analysis and evolution pattern of systems in the theory of inventive problem solving (TRIZ). By the concept of standard solution about introducing S3 substance, modification of S1 (human) and S2 (mosquito) between first substance SI and second substance S2 with harmful effect, we got the concept of the mosquito trap with mosquito attractants instead of mosquito reluctants such as mosquito stick coil and skin medicine w~th bad and toxic smell. The number of mosquitos traped by one trap near cattle shed per one n~ght in summer, was over 10 thousands with some effects of air cleaning.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2003년도 춘계학술발표논문집
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• pp.70-79
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• 2003

Paper coating can give smoothness surface and good printability to uncoated paper. Macro roughness of base paper would be decreasing its groove and grit in view of side. Nevertheless its improving effect for paper, some kind of problem is showing in the fine coated paper. Especially, back trap mottle is one of serious problems in printing with fine coated paper. Printers can not adjust conditions to overcome the problem. Also large amounts of paper can be rejected. There are many factors that influence back trap mottle. However it is not clear what the important parameters are in back trap mottle. Back trap mottle has some relationship with ink setting but good guidelines are not clear. Back trap mottle has been linked to non-uniform ink setting. We do not know how much variation in setting we can tolerate. Other mottle issues such as micro-picking and ink refusal are still common. This paper was prepared to identify correlation with ink setting and delta ink density obtained from experiment and then tried to find out some relationships with ink setting and back trap mottle. Basically fine calcium carbonate and ciay was used for main components and coarse calcium carbonate was mixed in two fine pigments to change its porosity and ink acceptance. Micro ink tack force at KRK printing tester was adapted to measure ink setting rate. KRK units were used for back trap mottle simulation and two printed samples were prepared to check delta ink density. Clay base coating has more fast ink setting time than calcium carbonate's though smoothness of clay was better than calcium carbonate. It could be explained by that clay has finer pore in its coating than calcium carbonate. DID(delta ink density) has shown a good correlation with ink setting time from micro ink tack. The total pore volume of coating layer did not match with ink setting and DID. From the results we might conclude coating that has fine pore size around 0.05 ${\mu}m$ can be exposed to high possibility of back trap mottle.

• 수산해양기술연구
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• 제46권4호
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• pp.292-301
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• 2010

For an effective management of fisheries resources, it is very important that to make clean inhabitation environment and to preserve fisheries resources. The material which is mainly used as fishing gear in modern times, is polyethylene, polypropylene, polyamide, etc., chemical fiber. And lost fishing gears which are make of these, occur ghost fishing and ocean pollution. To solve these problem, we development biodegradable fishing trap using the polybutylene succinate (PBS). Developed traps are for red snow crab (Chionoecetes japonicus) and shrimp, major traps in the East Sea, and we carried out fishing research using two kind traps in the coastal sea of Ayajin-port (Goseong) to analysis fishing efficiency of PE trap and PBS trap. As a result for fishing experiment (year 2005-2006) of red snow crab trap, two kind traps were almost the same in catches and length composition. During a experiment, parts of meshes, used for over 1 year, were cut by biodegradation. As a result for fishing experiment (year 2007) of shrimp trap, northern shrimp (Pandalus eous), coonstripe shrimp (Pandalus hypsinotus) and morotoge shrimp (Pandalopsis japonica) were catched, and the almost is northern shrimp. Two kind traps were almost the same in catches and length composition. In accordance with these result, it is recommended that the developed traps are have to commercialized because the fishing powers of PE traps and PBS traps were same. But biodegradation speed is have to controled in consideration of ocean microorganism volume and traps life.

• Korean Journal of Acupuncture
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• 제36권2호
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• pp.115-126
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• 2019

Objectives : Osteoporosis is a condition characterized by low bone mass and increased bone fragility. It has become a major problem of senior citizens. The purpose of this study is to experiment the effect of water extract of Forsythiae Fructus (wFF) on osteoclast differentiation; and the other purpose is to examine the effect of wFF on osteoporosis in ovariectomized rat. Methods : To investigate the effect of wFF on osteoclast differentiation and activity, RAW 264.7 cells were used. The number of TRAP positive cell, TRAP activity, pit area, mRNA expression of makers (RANK, TRAP, CA II, CTK, MMP-9, NFATc1, c-Fos), protein expression of makers (NFATc1, c-Fos) were investigated. For in vivo study, 40 female Sprague-Dawley (SD) rats were induced osteoporosis by ovariectomy (OVX) and then tested for anti-osteoporosis effect by administration of wFF. Results : wFF suppressed osteoclatogenesis, TRAP activity and pit area formation. Moreover, wFF decreased the expression of master differentiation factors (NFATc1, c-Fos) and also reduced the osteoclastogenesis-related markers (TRAP, CA II, CTK, MMP-9). These suggest that wFF inhibit osteoclasts differentiation and bone resorption. In the OVX rat model, wFF inhibited decreasing of BMD and trabecular area. Conclusions : Forsythiae Fructus should be effective for osteoporosis prevention and treatment.

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3521-3523
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• 2011

• 농약과학회지
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• 제12권3호
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• pp.256-261
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• 2008

최근 충북 영동지방을 중심으로 대발생되고 있는 갈색여치에 대하여 친환경적인 방법으로 유인트랩을 이용한 방제를 검토하였다. 농가에서 쉽게 구할 수 있는 PET 프라스틱 빈병을 이용하여 Fish 트랩을 제작하였다. 유인조성물로서 상수리나무잎 대비 과일의 과육 및 과일 주스, 막걸리와 어분을 영동지역 포장에 직접 처리하여 유인효과를 비교하였다. 1일 동안의 유인력을 검토한 결과, 본 연구에서 제작하여 적용한 Fish 트랩이 Funnel 트랩에 비해 높은 유인효과를 보였으며, 유인 조성물 효과는 복숭아주스(32.7마리) > 막걸리+어분(31.3마리) >막걸리(27.0마리) > 배주스(19.0마리) > 사과주스(17.2마리) > 어분(16.7마리) > 포도주스(14.4마리) > 상수리나무잎(2.3마리) 순서로 나타났다. 과일의 과육에 대한 유인효과에 비해 과일 주스의 효과가, 그리고 트랩을 지면에 설치 시 보다 지상 1m의 높이에 처리했을 때 유인효과가 높게 나타났으며, 막걸리+어분의 유인지속성은 방부제를 혼합 처리한 유인트랩에서 그 효과가 지속되었다.

• 수산해양기술연구
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• 제43권4호
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• pp.339-346
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• 2007

Estimating fishing capacity is one of current hot issues in the international fisheries. It is because that increased fishing capacity has caused not only fish stocks to be reduced, but also additional fishing costs to be incurred without additional incomes, which resulted in decrease of economically viability of fisheries. In order to solve this problem, FAO adopted 'the International Plan of Action for the Management of Fishing Capacity' in 1999 and recommended that member countries to measure fishing capacity and to implement the domestic action plan to reduce excess fishing capacity. This study is aimed at assessing fishing capacity of the octopus coastal trap fishery(OCTF) using data envelopment analysis(DEA) which is a method recommended by FAO. The DEA results on 10 individual OCTF vessels showed that the capacity utilization(CU) was a 0.93 on average, indicating some differences in CU among vessels(0.79-1.0). In addition, results of the sensitivity analysis revealed that under the current level of catch, the gross tonnage, horse power, days fished, and traps per trip could be reduced by 35%, 33%, 16%, and 18% on average, respectively.

• 한국조경학회지
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• 제26권4호
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• pp.59-69
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• 1999

This study examines the existing theories related to detention basin and embodies the calculation process of sediment basin. It investigated the scale of sediment basin by actual measurement at Buju Mountain, Mokpo city which causes the environmental problems like erosion and outflow of sediment due to the excessive development, finds the problems of existing sediment basin by applying and analyzing the physical factors which affect the execution of sediment basin using GIS as the method establishing the scale of sediment basin embodied in this study and then suggests the oteimum scale. Comparing the surface area of the existing sediment basin and of the required one, all of the surface areas of the existing sediment basins were smaller than those of the required one. Therefore, it can be expected that the trap efficient of sediment will be declined. The required one. Therefore, it can be expected that the trap efficient of sediment will be declined. The required minimum depth was fully satisfied, but it is analyzed that the volume of sediment basin will affect the neighboring environment because it can not accomodate the inflow discharge volume except sediment basin C. It is consistent with the actual situation which causes a serious environmental problem due to the overflow of sediment basin during the heavy storm event except sediment basin C and also it verifies the validity of calculation process of establishing optimum sediment basin suggested in this study.

• Current Optics and Photonics
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• 제5권3호
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• pp.220-228
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• 2021

To improve the measurement accuracy of a solar-radiation observer instrument, aiming at the problem of multiorder-stray-light interference caused by the diffraction of the flat-field concave grating in the spectroscopic system, straylight suppression methods for different forms of optical traps are studied. According to the grating surface-scattering distribution-function model, the bidirectional scattering distribution function (BSDF) of a dust-polluted surface and the flat-field concave grating's transition area of the spectroscopic system is calculated, and a Lyot stop with blade baffle is designed to suppress this kind of stray light. For diffraction multiorder stray light, based on the theory of light-energy transmission, a design for precise positioning of the trench optical trap is proposed. The superiority of the method is verified through simulation and actual measurement. The simulation results show that in a spectroscopic system approximately 160 mm × 140 mm × 80 mm in size, the energy of the stray light is reduced by one order of magnitude by means of the trench optical trap and Lyot stop, and the number of beams is reduced from 5664 to 1040. The actual measurements show that the stray-light-suppression efficiency is about 69.4%, which is effective reduction of the amount of stray light.