• International Journal of Advanced Culture Technology
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• 제10권2호
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• pp.292-299
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• 2022

In precision agriculture (PA), the differences of the agriculture related parameters such as temperature, humidity, soil moisture among different fields are considered and analyzed to precisely utilize water, pesticides, fertilizer, seeds, etc. in fields. Hence, it becomes possible to increase the profit, reduce waste and maintain quality products. This paper suggests a framework for RFID sensor network in view of PA, especially, associated with Container-grown seedlings(CGS), and presents the analysis and simulation by using Ultra High Frequency (UHF) RFID tag system. The simulation is divided into the transmitter and receiver part using Matlab/Simulink. The architecture of the model is flexible to achieve different modulation and encoding types. Finally, some results of the simulation are presents.

• Natural Product Sciences
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• 제25권1호
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• pp.1-10
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• 2019

The ginsenoside content was compared with wild simulated ginseng (Panax ginseng) collected every season at 11 wild simulated ginseng plantations in Korea. As a result, the total saponin of 7 years old wild simulated ginseng showed the highest content of 4.5% in spring sampling wild simulated ginseng, 2.0% in summer sampling wild simulated ginseng, 1.2% in winter sampling wild simulated ginseng and 1.0% in autumn sampling wild simulated ginseng. And also, the total saponin of 10 years old wild simulated ginseng showed the highest content of 3.9% in spring sampling wild simulated ginseng, summer sampling wild simulated ginseng (1.8%), winter sampling wild simulated ginseng (1.6%) and autumn sampling wild simulated ginseng (0.6%). Therefore, the total saponin of spring sampling wild simulated ginseng was about 4.5 - 6.5 times higher than that of autumn sampling wild simulated ginseng regardless of cultivation period.

• 생약학회지
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• 제50권4호
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• pp.305-311
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• 2019

The purpose of this study was to examine the changes in seasonal bioactive components of 4 and 6 years old fresh ginseng (Panax ginseng) and to provide basic information on the development of functional food using fresh ginseng. Seasonal changes were investigated by ginseng saponin analysis using HPLC method and acidic polysaccharides by carbazole sulfuric acid method. Total saponins showed the highest content of fresh ginseng collected in May, followed by March, July, and September. Fresh ginseng collected in May showed 2.5 times (4 years old) - 3.0 times (6 years old) higher than fresh ginseng collected in September. Acidic polysaccharides showed high content of fresh ginseng collected in March and September, and low content of fresh ginseng collected in May and July. From these results, the fresh ginseng collected in May can develop high concentrations of saponin. On the other hand, fresh ginseng collected in March and September is thought to be able to develop high concentration products of acidic polysaccharides.

• International Journal of Advanced Culture Technology
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• 제8권3호
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• pp.260-268
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• 2020

Currently, it is usually a 3D scanner processing method as a laser method. However, the laser method has a disadvantage of slow scanning speed and poor precision. Although optical scanners are used as a method to compensate for these shortcomings, optical scanners are closely related to the distance and precision of the object, and have the disadvantage of being expensive. In this paper, 3D scanner using variable focus lens-based structured light module with improved measurement precision was designed to be high performance, low price, and usable in industrial fields. To this end, designed a telecentric optical system based on a variable focus lens and connected to the telecentric mechanism of the step motor and lens to adjust the focus of the variable lens. Designed a connection structure with optimized scalability of hardware circuits that configures a stepper motor to form a system with a built-in processor. In addition, by applying an algorithm that can simultaneously acquire high-resolution texture image and depth information and apply image synthesis technology and GPU-based high-speed structured light processing technology, it is also stable for changes to external light. We will designed and implemented for further improving high measurement precision.

• 한국정밀공학회지
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• 제30권10호
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• pp.1041-1049
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• 2013

One of the causes of malfunction of commercial vehicle is corrosion or wear. In order to prevent corrosion and wear, lubricants have to be supplied periodically. However, the period of lubrication usually depends on operator's judgment. If the period is too short, excess lubricant will cause pollution and unnecessary expenses, where as long periodic supply of lubricant might cause wear, damage and eventual breakdown. Therefore, an automatic lubrication system with predetermined interval will reduce the excessive supply of lubricating oil and prevent wear and damage. This thesis presents an automatic lubrication system which consists of a lubricant pump and an embedded controller. An automatic lubrication operating algorithm is used to operate the lubricant pump and feedback the pressure status of the system using pressure sensors. The developed system shows an efficient periodic supply of lubricant.

• 생약학회지
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• 제49권3호
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• pp.203-218
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• 2018

It has been extensively known in the high temperature regions such as southern China and south east Asia that Korean ginseng(Panax ginseng) intake raises body heat, while American ginseng(Panax quinquefolium) lowers it, based upon oriental medicine. This is likely due to the misunderstanding of the conception that Korean ginseng shows a warm property, resulting in enhanced blood circulation and stimulation of metabolism. It's further supported by the fact that current scientific studies have shown no notable side effects. Moreover, it has been demonstrated in animal experimental test that Korean ginseng shows a complementary effect in a high temperature environment, together with scientific evidence of a preventive effect of ginseng saponin against cold conditions, suggesting it to exhibit an adaptogenic effect normalizing the body under abnormal body conditions. However, there is a shortage of studies published concerning comparative clinical and animal studies of Korean and American ginsengs, and also, on natives of high temperature countries. Therefore, a further placebo-controlled clinical study has to be considered to elucidate scientifically clinical evaluation of Korean and American ginsengs on the body heat. In this article, we summarize the scientific publications reporting the clinical comparative study of Korean and American ginsengs on body heat response.

• 생약학회지
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• 제49권2호
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• pp.85-102
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• 2018

A drug interaction is a situation in which a substance affects the activity of a drug, synergistically or antagonistically, when both are administered together. It has been shown that orally taken ginsenosides are deglycosylated by intestinal bacteria to give ginsenosides metabolites, which has been considered to be genuine pharmacological constituents and to exhibit drug interactions. Animal experimental results demonstrated that ginsenoside metabolites play an important role in the inhibitory or inductive action of both CYPs (cytochrome p450) and P-gp (p-glycoprotein), thereby can be applied as metabolic modulator to drug interactions. Very few are known on the possibility of drug interaction if taken the recommended dose of ginseng, but it has been found to act as CYPs inductor and P-gp inhibitor in any clinical trial, suggesting the risk that side effects will occur. It has been recently reported that interactions might also exist between ginseng and drugs such as warfarin, phenelzine, imatinib and raltegravir. Moreover, medicinal plants are increasingly being taken in a manner more often associated with prescription medicines. Therefore, considering the extensive applications of ginseng for safety, the aim of this review is to present a comprehensive overview of ginseng and drug interactions based upon pharmacodynamic and pharmacokinetic evidences.

• 해양환경안전학회지
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• 제26권6호
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• pp.665-673
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• 2020

목포해양대학의 해사대학은 학생들에게 선박과 해양에 대한 특수성에 적응할 수 있는 교육 및 훈련 프로그램을 운영하고 있다. 본 연구의 목적은 사회맞춤형학과 교육 프로그램의 운영을 통한 프로그램의 만족도가 학생의 핵심역량 향상과 자기주도역량 향상에 미치는 영향을 확인하는 것이다. 사회맞춤형학과 비교과 교육 프로그램을 조사하였으며, 그 중 통계분석이 가능한 비교과 교육 프로그램인 TALK+를 분석 대상으로 선정하였다. TALK+ 프로그램은 해사대학의 특수성을 반영한 인사담당자와 소통을 할 수 있게 연결해주는 프로그램이며, 259개의 만족도 조사 결과를 분석하였다. 분석 결과, 전체적으로 Likert 척도가 평균 4점 이상으로 높은 만족도를 나타내었으며, 만족도는 핵심역량 및 자기주도역량과 통계적으로 강한 양의 상관관계를 나타내었다. 또한 선형회귀분석을 실시하였으며, 만족도는 핵심역량 향상 및 자기주도역량 향상에 통계적으로 유의한 영향을 미치는 것으로 분석되었다(p < 0.001). 본 연구를 통해 다양한 비교과 프로그램의 개발과 동시에 무엇보다도 만족도를 향상시키기 위한 노력이 필요한 것으로 확인되었다.