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안난희, 신재훈, 옥정훈, 이상민, 김석철, 사동민 忠北大學校 農業科學硏究所 2016 農業科學硏究 Vol.32 No.2
Soil fertility is fundamental in determining the productivity of all farming systems and is most�ᅠ�ᅠ commonly defined in terms of the ability of the soil to supply nutrients to crops. Organic farming systems rely on the management of soil organic matter to enhance the chemical, biological and physical properties of the soil, in order to optimize crop production. Organic agriculture excludes the use of chemical nitrogen fertilizers, instead requiring a balance between supply and demand nutrients through the use of organic matter. Nutrient management is one of the main challenges facing organic farming. The short term challenge is supplying sufficient nutrients to crops at the correct point in their development to achieve economically viable yield, while in the long term, the difficulty is to balance nutrient inputs and runoffs to avoid nutrient rundown or environmental pollution. This paper reviews information from the literature to investigate strategies of managing nutrients by supplying organic matter in organic agriculture during the major phases of crop growth.
Transduced PEP-1-AMPK inhibits the LPS-induced expression of COX-2 and iNOS in Raw264.7 cells
( Min Jea Shin ),( Yeom Pyo Lee ),( Dae Won Kim ),( Jae Jin An ),( Sang Ho Jang ),( Sung Min Cho ),( Seung Hoon Sheen ),( Hae Ran Lee ),( Hae Yong Kweon ),( Seok Woo Kang ),( Kwang Gill Lee ),( Jin Se 생화학분자생물학회 2010 BMB Reports Vol.43 No.1
Auto-Landing Guidance System Design for Smart UAV
Min, Byoung-Mun,Shin, Hyo-Sang,Tahk, Min-Jea,Kim, Boo-Min,Kim, Byoung-Soo The Korean Society for Aeronautical and Space Scie 2006 International Journal of Aeronautical and Space Sc Vol.7 No.1
This paper deals with auto-landing guidance system design applicable to Smart UAV(Unmanned Aerial Vehicle). The proposed guidance law generates horizontal position, velocity and altitude commands in the longitudinal channel and heading angle command in the lateral channel to track a predetermined trajectory for automatic landing. The longitudinal guidance commands are derived from an approximated dynamic equations in vertical plane. These longitudinal guidance commands are appropriately distributed to each control input as the flight mode of Smart UAV is changed. The concept of VOR(VHF Omni-directional Range) guidance system is applied to generate the required heading angle commands to eliminate the lateral deviation from the desired trajectory. The performance of the proposed guidance system for Smart UAV is evaluated using the nonlinear simulation. Simulation results show that the proposed guidance system for auto- landing provides good tracking performance along the predetermined landing trajectory.
( Min Jea Shin ),( Dae Won Kim ),( Yeon Joo Choi ),( Hyun Ju Cha ),( Sung Ho Lee ),( Sunghou Lee ),( Jinseu Park ),( Kyu Hyung Han ),( Won Sik Eum ),( Soo Young Choi ) 생화학분자생물학회 2020 BMB Reports Vol.53 No.2
Glutaredoxin 1 (GLRX1) has been recognized as an important regulator of redox signaling. Although GLRX1 plays an essential role in cell survival as an antioxidant protein, the function of GLRX1 protein in inflammatory response is still under investigation. Therefore, we wanted to know whether transduced PEP-1-GLRX1 protein inhibits lipopolysaccharide (LPS)- and 12-O-tetradecanoyl phorbol-13-acetate (TPA)-induced inflammation. In LPS-exposed Raw 264.7 cells, PEP-1-GLRX1 inhibited cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), activation of mitogen activated protein kinases (MAPKs) and nuclear factor-kappaB (NF-κB) expression levels. In a TPA-induced mouse-ear edema model, topically applied PEP-1-GLRX1 transduced into ear tissues and significantly ameliorated ear edema. Our data reveal that PEP-1-GLRX1 attenuates inflammation in vitro and in vivo, suggesting that PEP-1-GLRX1 may be a potential therapeutic protein for inflammatory diseases. [BMB Reports 2020; 53(2): 106-111]
Auto-Landing Guidance System Design for Smart UAV
Byoung-Mun Min,Hyo-Sang Shin,Min-Jea Tahk,Boo Min Kim,Byoung Soo Kim 한국항공우주학회 2006 International Journal of Aeronautical and Space Sc Vol.7 No.1
This paper deals with auto-landing guidance system design applicable to Smart UAV(Unmanned Aerial Vehicle). The proposed guidance law generates horizontal position, velocity and altitude commands in the longitudinal channel and heading angle command in the lateral channel to track a predetermined trajectory for automatic landing. The longitudinal guidance commands are derived from an approximated dynamic equations in vertical plane. These longitudinal guidance commands are appropriately distributed to each control input as the flight mode of Smart UAV is changed. The concept of VOR(VHF Omni-directional Range) guidance system is applied to generate the required heading angle commands to eliminate the lateral deviation from the desired trajectory. The performance of the proposed guidance system for Smart UAV is evaluated using the nonlinear simulation. Simulation results show that the proposed guidance system for auto- landing provides good tracking performance along the predetermined landing trajectory.
Temporal Error Concealment Technique using Edge Direction Matching in H.264
Shin-Kyoo Park,Goo-Rak Kwon,Min-Cheol Hwang,Sung-Jea Ko 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
In this paper, we propose a temporal error concealment (EC) method which preserves image continuity across the boundaries. For temporal EC, various block matching-based algorithms are researched to refine the corrupted video. However, existing temporal EC methods are suffered from the blocking artifacts in visual quality since those methods do not consider the edge orientation at the macroblock border. To solve these problems, we propose new EC technique using edge direction matching to preserve the edge information while alleviating the blocking artifacts. Experimental results show that the proposed algorithm yields superior subjective and objective video quality than the conventional algorithms.
Guidance Synthesis to Control Impact Angle and Time
Shin, Hyo-Sang,Lee, Jin-Ik,Tahk, Min-Jea 한국항공우주학회 2006 International Journal of Aeronautical and Space Sc Vol.7 No.1
A new guidance synthesis for anti-ship missiles to control impact angle and impact time is proposed in this paper. The flight vehicle is assumed as a 1st order lag system to consider more practical system. The proposed guidance synthesis enhances the survivability of anti-ship missiles because multiple anti-ship missiles with the proposed synthesis can hit the target simultaneously. The control input to satisfy constraints of zero miss distance and impact angle, and the feedforward bias control input to control impact time constitute the guidance law. The former is from trajectory shaping guidance, the latter is from neural network. And particle swarm optimization method is introduced to furnish reference input and output for learning in neural network. The performance of the proposed synthesis in the accuracy of impact time and angle is validated by numerical examples.
Enhancement of Antimicrobial peptides production by epigenetic regulation
Jea Hui Kim,Ho Am Jang,Hyeon Jun Shin,Jun Yang Jeong,Seo Jin Lee,Sung Min Ku,Dong Woo Kang,So Yeon Choi,Yong Seok Lee,Yeon Soo Han,Yong Hun Jo 한국응용곤충학회 2024 한국응용곤충학회 학술대회논문집 Vol.2024 No.04
Recently, it is demonstrate that the invertebrates have a immune memory, called Immune priming (IP). It was partially studied that the IP is mainly regulated by epigenetic modification. Here, to understand the IP on antimicrobial peptides (AMPs) production, we investigated larval mortality and time-dependent expression patterns of AMP genes in T. molitor larvae challenged with E. coli (two-times injection with a one-month interval). Interestingly, the results indicate that the higher and faster expression levels of most AMP genes were detected compared to the non-primed T. molitor larvae. Our results may used to improve the understanding of mechanisms of invertebrate immune memory.
Modeling and Autopilot Design of Blended Wing-Body UAV
Min, Byoung-Mun,Shin, Sung-Sik,Shim, Hyun-Chul,Tahk, Min-Jea The Korean Society for Aeronautical and Space Scie 2008 International Journal of Aeronautical and Space Sc Vol.9 No.1
This paper describes the modeling and autopilot design procedure of a Blended Wing-Body(BWB) UAV. The BWB UAV is a tailless design that integrates the wing and the fuselage. This configuration shows some aerodynamic advantages of lower wetted area to volume ratio and lower interference drag as compared to conventional type UAV. Also, BWB UAV may be increase payload capacity and flight range. However, despite of these benefits, this type of UAV presents several problems related to flying qualities, stability, and control. In this paper, the detailed modeling procedure of BWB UAV and stability analysis results using the linearized model at trim condition are represented. Finally, we designed the autopilot of BWB UAV based on a simple control allocation scheme and evaluated its performance through nonlinear simulation.