• Title/Summary/Keyword: Drone

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Effect of Cordyceps militaris on Testosterone Production in Sprague-Dawley Rats

  • Hong, In-Pyo;Choi, Yong-Soo;Woo, Soon-Ok;Han, Sang-Mi;Kim, Hye-Kyung;Lee, Man-Young;Lee, Myung-Ryul;Humber, Richard A.
    • International Journal of Industrial Entomology
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    • v.23 no.1
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    • pp.143-146
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    • 2011
  • Some of men have been suffered from the insufficient secretion of testosterone causing by physical factors, social and psychological factors. Testosterone is an essential steroid hormone controlling male reproductive function. Alternative medicines in plants, fungi, and insects have been studied to enhance sexuality. $Cordyceps$ species including $Cordyceps$ $sinensis$ (CS) and $C.$ $militaris$(CM) has been used as for the enhancement of sexual functionfor hundreds of years in Far East Asian. In the present study, we determined the effect of fruiting bodies of $C.$ $militaris$ which cultured on bee drone medium (CMD) and brown rice medium (CMB) on testosterone concentration in Sprague-Dawley rats. Eighteen rats per group were housed to regular diet or diet supplemented with CMB and CDD, respectively for 4 weeks. Serum was collected from 6 rats per group. Results showed that changes of the body weight, food and water intake of the rats were not observed in this study. However, both CMB and CDD increased the serum testosterone concentration in rats. Furthermore, CMD significantly stimulated testosterone production (p <0.05) compared to the control. Hence, it suggests that $C.$ $militaris$ fruiting bodymight be developed as a complementary medicine to improve sexual hormones.

A Study on Underwater Camera Image Correction for Ship Bottom Inspection Using Underwater Drone (수중드론을 활용한 선박 선저검사용 수중 카메라 영상보정에 대한 연구)

  • Ha, Yeon-chul;Park, Junmo
    • Journal of the Institute of Convergence Signal Processing
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    • v.20 no.4
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    • pp.186-192
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    • 2019
  • In general, many marine organisms are attached to the bottom of a ship in operation or a ship in construction. Due to this phenomenon, the roughness of the ship surface increases, resulting in loss of ship speed, resulting in economic losses and environmental pollution. This study acquires / utilizes camera images attached to ship's bottom and underwater drones to check the condition of bottom. The acquired image will determine the roughness according to marine life by the administrator's visual confirmation. Therefore, by applying a filter algorithm to correct the image to the original image can help in the correct determination of whether or not attached to marine life. Various correction filters are required for the underwater image correction algorithm, and the lighting suitable for the dark underwater environment has a great influence on the judgment. The results of the research test according to the calibration algorithm and the roughness of each algorithm are considered to be applicable to many fields.

Stimulatory Effect of Cordyceps militaris on Testosterone Production in Male Mouse (밀리타리스동충하초가 테스토스테론 형성에 미치는 영향)

  • Hong, In-Pyo;Choi, Yong-Soo;Woo, Soon-Ok;Han, Sang-Mi;Kim, Hye-Kyung;Lee, Myung-Ryul;Nam, Sung-Hee;Ha, Nam-Gyu
    • The Korean Journal of Mycology
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    • v.39 no.2
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    • pp.148-150
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    • 2011
  • Cordyceps militaris(CM) has been used as a traditional folk medicine to strengthen the immune system and regain energy for hundreds of years in Far East Asian countries. In the present studies, we determined that the stimulatory effect of Cordyceps militaris on testosterone production in male mouse rats. Results illustrated that changes of the body weight, food and water intake of the rats were not observed in this study but the concentration of testosterone in the serum of the rats was significantly increased by CM(p < 0.05). Therefore fruiting bodies of CM grown on the drone bee medium may be an integrative medicine for the treatment of reproductive problems caused by insufficient testosterone levels in human males.

A Case Study of Recent New Terrorism and Potential Patterns in South Korea (최근 국외 뉴테러리즘의 사례분석과 국내 발생가능 유형에 대한 연구)

  • Jeon, Yong-Jae;Lee, Chang-Bae;Lee, Seung-Hyun
    • Korean Security Journal
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    • no.53
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    • pp.11-33
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    • 2017
  • Terrorism has existed in the entire human history and has become a significant topic in criminology while prior studies has focused on North Korea as the perpetrator, and this prevents an in-depth discussion of the international trends of terrorism. As soft targets are the main target of new terrorism and because we never ignore the significance of the consequences, there are needs for more studies on the topic. This study conducted a case study of major terrorism attacks and surveyed professionals in the field via an AHP analysis in order to find the characteristics of terrorism and its potential patterns in South Korea. As a result, we found that North Korea or the left-wing may utilize homemade bomb, motor vehicle or drone for the purpose of attacking multi-use facilities in South Korea. For policy implications, we insist developing a better CPTED approach on those facilities, improving professionalism of cyber-watchdog via more training and education, stricter control on drone permit, and operation of counseling centers for preventing radicalization.

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A Study on the Technique of Efficient TDOA Technique Direction Finding Using Drones (드론을 이용한 효율적인 TDOA 방향탐지 기법 연구)

  • Choi, Hong-Rak;Hah, Tae-Yeong;Kim, Young Won;Kim, Kyung-Seok
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.4
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    • pp.97-104
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    • 2018
  • In the conventional direction finding, the antenna is installed at a high position on the ground to detect the position of the target with the environment of the LOS(Line of Sight) as much as the signal receiving environment. However, in order to configure such environment, high cost and installation time were required. In this paper, we use TDOA(Time Difference of Arrival) technique to utilize drones in direction finding, so that four drones can be used for directions finding simulation. Simulations based on drone and TDOA direction finding were constructed using additional signal processing Taylor series and Exact Interactive Algorithm. In the simulation, the receiving power is defined by using the 800MHz path-loss model using the GPS information of the ground direction detection, and the position estimation performance is analyzed when the TDOA technique, the Taylor series, and the Exact Interactive Alogrithm are applied.

Real-time Underground Facility Map Production Using Drones (드론을 이용한 실시간 지하시설물도 작성)

  • NO, Hong-Suk;BAEK, Tae-Kyung
    • Journal of the Korean Association of Geographic Information Studies
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    • v.20 no.4
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    • pp.39-54
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    • 2017
  • Between 1998 and 2010, the computerization of underground facilities was completed in 84 cities. Since 2011, new pipelines have been laid or existing pipelines have been maintained, renovated, and renewed. To measure the exact location and depth of the exposure pipe, a map of underground facilities was created before filling the ground. This method is based on the time when the underground facilities of the National Geographic Information Institute Regulation No. 134 of the National Geographic Information Office revised in 2010 were drafted. The process of the drone taking the video is based on a theoretical basis of ground control points. The method works by removing all ground control points located outside of the error range and re-processing it for calculating the best result. Furthermore, using a drone-based spontaneous measuring method allows workers to obtain a high accuracy underground facilities map in error bound. The proposed method could be used as a new way to standardize the processing.

Use of a Drone for Mapping and Time Series Image Acquisition of Tidal Zones (드론을 활용한 갯벌 지형 및 시계열 정보의 획득)

  • Oh, Jaehong;Kim, Duk-jin;Lee, Hyoseong
    • Journal of the Korean Institute of Intelligent Systems
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    • v.27 no.2
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    • pp.119-125
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    • 2017
  • The mud flat in Korea is the geographical feature generated from the sediment of rivers of Korea and China and it is the important topography for pollution purification and fishing industry. The mud flat is difficult to access such that it requires the aerial survey for the high-resolution spatial information of the area. In this study we used drones instead of the conventional aerial and remote sensing approaches which have shortcomings of costs and revisit times. We carried out GPS-based control point survey, temporal image acquisition using drones, bundle adjustment, stereo image processing for DSM and ortho photo generation, followed by co-registration between the spatio-temporal information.

Research Trend Analysis of Unmanned Aerial Vehicle(UAV) Applications in Agriculture (농업분야 무인항공기(UAV) 활용 연구동향 분석)

  • Bae, Seoung-Hun;Lee, Jungwoo;Kang, Sang Kyu;Kim, Min-Kwan
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.43 no.2
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    • pp.126-136
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    • 2020
  • Recently, unmanned aerial vehicles (UAV, Drone) are highly regarded for their potential in the agricultural field, and research and development are actively conducted for various purposes. Therefore, in this study, to present a framework for tracking research trends in UAV use in the agricultural field, we secured a keyword search strategy and analyzed social network, a methodology used to analyze recent research trends or technological trends as an analysis model applied. This study consists of three stages. As a first step in data acquisition, search terms and search formulas were developed for experts in accordance with the Keyword Search Strategy. Data collection was conducted based on completed search terms and search expressions. As a second step, frequency analysis was conducted by country, academic field, and journal based on the number of thesis presentations. Finally, social network analysis was performed. The analysis used the open source programming language 'Python'. Thanks to the efficiency and convenience of unmanned aerial vehicles, this field is growing rapidly and China and the United States are leading global research. Korea ranked 18th, and bold investment in this field is needed to advance agriculture. The results of this study's analysis could be used as important information in government policy making.

Developed a test rig for studying the hover performance of a coaxial propeller (동축반전 프로펠러의 제자리 비행 성능연구를 위한 시험장치 개발)

  • Song, Youn-Ha;Song, Jae-Rim;Kim, Deog-Kowan
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2017.05a
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    • pp.560-562
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    • 2017
  • This paper presents the development and test results of a test rig for confirming the hover performance of the coaxial propeller which is applied to the drone in order to carry out the mission that requires high payload such as the development of the courier drones. the performance of each propeller was measured by varying the thrust and torque according to the H/D ratio. the Thrust sensor and torque sensor were used to measure the thrust and torque generated when the propeller rotated, and a photo sensor was used to measure the rpm. it used the data acquisition system to acquire data from each sensor, and used the Labview softwaer to control data storage, monitoring and BLDC motor control. In the test, each propeller meansured the figure of mefit according to the chansge of the interval at the same rpm.

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Power Charge Scheduling and Charge-Ready Battery Allocation Algorithms for Real-Time Drones Services (실시간 드론 서비스를 위한 전원 충전 스케쥴링과 충전 배터리 할당 알고리즘)

  • Tajrian, Mehedi;Kim, Jai-Hoon
    • KIPS Transactions on Computer and Communication Systems
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    • v.8 no.12
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    • pp.277-286
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    • 2019
  • The Unmanned Aerial Vehicle (UAV) is one of the most precious inventions of Internet of things (IOT). UAV faces the necessity to charge battery or replace battery from the charging stations during or between services. We propose scheduling algorithms for drone power charging (SADPC). The basic idea of algorithm is considering both a deadline (for increasing deadline miss ratio) and a charging time (for decreasing waiting time) to decide priority on charging station among drones. Our simulation results show that our power charging algorithm for drones are efficient in terms of the deadline miss ratio as well as the waiting time in general in compare to other conventional algorithms (EDF or SJF). Also, we can choose proper algorithms for battery charge scheduling and charge ready battery allocation according to system parameters and user requirements based on our simulation.