检索结果-南通市图书馆

Towards smart farming solutions in the *** South Korea:A comparison of the current status

Geography and Sustainability 2021年第4期2卷 312-327页

作者： Susan A.O’Shaughnessy Minyoung kim Sangbong Lee youngjin kim Heetae kim John Shekailo USDA-ARS Conservation and Production Research Laboratory2300 Experiment Station RDBushlandTexas USA 79012 R&D Coordination Division Rural Development Administration54875Republic of Korea National Institute of Agricultural Sciences Rural Development Administration54875Republic of Korea USDA-ARS Office of International Research Engagement and CooperationBeltsvilleMD 20705

Smart farming solutions combine information,data software tools,and technology with the intent to improve agricultural *** smart farming concepts are well described in the literature,the potential societal impacts of smart farming are less *** demonstrate how smart farming solutions could influence future agricultural production,agri-business and rural communities and their constituents,this article compares smart farming approaches and reasons behind the pursuit of smart farming solutions by the *** South *** article compares agricultural assets and productivity among the two countries as well as the technical and societal challenges impacting agricultural production as a basis to understanding the motivations behind and pathways for developing smart farming *** doing so,the article compares some of the technological and social advantages and disadvantages of smart farming,dependending on the choice and implementation of smart farming *** South Korean government has implemented a national policy to establish smart farming communities;a concept that addresses the entire agri-food supply *** the U.S.,a national plan to develop smart farming technologies does not ***,discrete smart farming solutions driven mainly by competition in the private sector have resulted in high-tech solutions that are advancing smart farming *** differences in approaches and reporting of successes and failures between the two countries could facilitate the rate of evolution of successful smart farming solutions,and moreover,could provide pathways to facilitate sustainable development goals in developing countries where smart farming activities are currently underway.

关键词： Agri-food Climate change Information technology Sustainable agriculture

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal-Fats Biodiesel as a Heating Fuel for Agricultural Hot Air Heaters

引用

Journal of Agricultural Science and Technology(B) 2012年第10期2卷 1073-1079页

作者： Youngjung kim Seokho Park youngjin kim Chungkil kim Energy & Environmental Division Department of Agricultural Engineering National Academy of Agricultural Science RuralDevelopment Administration Suwon Republic of Korea

Biodiesel （BD） was made from animal-fats reacting with methanol and potassium hydroxide in the laboratory. The biodiesel made in the laboratory was sent to K-petro, the government agency to inspect the quality of animal-fats biodiesel, of which generally the quality was acceptable for heating oil for agricultural hot air heater. Kinematic viscosity and calorific values of the biodiesels were measured. BD20（K）, kerosene based biodiesel, showed 18 cSt at -20 ~C. It seems that BD100 can not be suitable for heating fuel under some temperature. As BD content increased calorific value decreased up to 40,000 J/g for 100% BD （BD100） while, light oil calorific value was 45,567 J/g, showing difference of 5,567 J/g （about 12% difference）, Several different fuels including BD20 （biodiesel 20% ＋ light oil 80%）, BD50 （biodiesel 50% ＋ light oil 50%）, BD100 （biodiesel 100%） and light oil were prepared and tested for fuel combustion qualities for agricultural hot air heater and their combustion performances were compared and analyzed. Flame dimensions of biodiesels and light oil were almost same shape at the same combustion condition in the burner of the hot air heater. Generally, CO2 amounts of BDs were greater than light oil, but the differences were so small that it is hard to tell there was significant difference between the BDs combustion and light oil.

关键词： Biodiesel animal-fats combustion hot air heater.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Polyacrylamide Application on Water and Nutrient Movements in Soils

引用

Journal of Agricultural Chemistry and Environment 2015年第3期4卷 76-81页

作者： Minyoung kim Inhong Song Minkyeong kim Seounghee kim youngjin kim Younghun Choi Myungchul Seo Department of Agricultural Engineering National Academy of Agricultural Science Rural Development Administration Jeonju Korea Research Institute for Agriculture and Life Sciences Seoul National University Seoul Korea Department of Agricultural Science National Academy of Agricultural Science Rural Development Administration Jeonju Korea Crop Production and Physiology Research Division National Institute of Crop Science Rural Development Administration Jeonju Korea

An understanding of nutrient movement in soil is important for developing management strategies to minimize nutrient leaching and surface movement, thus improving nutrient uptake by plants, maintaining a sustainable soil system, and even protecting groundwater quality. Polyacrylamide (PAM) is known as one of soil conditioner that functions to stabilize soil structure, increase infiltration, and reduce surface runoff. This study assesses the effects of PAM on the vertical movement of soil-water and major/minor nutrients (NO3-N, NH3-N, T-N, PO4-P, T-P, K, Ca, Mg, and Fe) in soils. Saturated hydraulic conductivity (Ksat) increases with increasing PAM concen- trations up to 10 mg·L-1 for sand and 20 mg·L-1 for a mixture of sand and clay. Decreases in the loss of soluble nutrients, particularly NH3-N, PO4-P and T-P, are observed as PAM concentrations increase. In contrast, PAM concentration has no effect on nitrate and minor nutrient levels. These results indicate that the application of PAM may be a viable method for protecting water bodies from excessive nutrients and improving nutrient availability for plants.

关键词： Polyacrylamide Water and Nutrient Movement Breakthrough Curve NaCl-Tracer Soil Column Major & Minot Nutrients

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Shielding and Infrared Shielding/Detection in Harsh Environments

引用

Nano-Micro Letters 2024年第10期16卷 543-560页

作者： Tufail Hassan Aamir Iqbal Byungkwon Yoo Jun Young Jo Nilufer Cakmakci Shabbir Madad Naqvi Hyerim kim Sungmin Jung Noushad Hussain Ujala Zafar Soo Yeong Cho Seunghwan Jeong Jaewoo kim Jung Min Oh Sangwoon Park youngjin Jeong Chong Min Koo School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea R&D Center INNOMXENE Co. Ltd.Daejeon 34365Republic of Korea School of Chemical Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge *** study presents a multifunctional Janus film integrating highly-crystalline Ti_(3)C_(2)T_(x) MXene and mechanically-robust carbon nanotube(CNT)film through strong hydrogen *** hybrid film not only exhibits high electrical conductivity(4250 S cm^(-1)),but also demonstrates robust mechanical strength and durability in both extremely low and high temperature environments,showing exceptional resistance to thermal *** hybrid Janus film of 15μm thickness reveals remarkable multifunctionality,including efficient electromagnetic shielding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)shielding capability with an average emissivity of 0.09(a minimal value of 0.02),superior thermal camouflage performance over a wide temperature range(−1 to 300℃)achieving a notable reduction in the radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability characterized by a 44%increase in resistance when exposed to 250 W IR *** multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic shielding and IR shielding/detection under challenging conditions.

关键词： MXene/carbon nanotube Janus film Electromagnetic interference shielding Infrared shielding Thermal camouflage Infrared detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高炉内焦炭行为的理论研究

引用

河南冶金 2019年第1期27卷 4-6,33页

作者：董茂林金荣镇崔松梅沈海波郑朋超首钢京唐钢铁联合有限责任公司韩国浦项制铁株式会社

结合生产实践,研究了焦炭在炉内的行为及其对炉缸温度变化的影响,分析认为炉缸铁水的流动和死焦堆的变化影响炉缸的活跃度,进而影响炉底温度的变化。在高炉下部透气性方面,下部(炉腹—炉腰—炉身下部)边缘的焦炭粉末积聚会导致高炉透气... 详细信息

结合生产实践,研究了焦炭在炉内的行为及其对炉缸温度变化的影响,分析认为炉缸铁水的流动和死焦堆的变化影响炉缸的活跃度,进而影响炉底温度的变化。在高炉下部透气性方面,下部(炉腹—炉腰—炉身下部)边缘的焦炭粉末积聚会导致高炉透气性变差,进而导致炉况不稳定。

关键词：焦炭死焦堆炉底温度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-redox phenazine/non-oxidized graphene/cellulose nanohybrids as ultrathick cathodes for high-energy organic batteries

引用

Nano Research 2021年第5期14卷 1382-1389页

作者： youngjin Ham Vitalii Ri Jin kim Yeoheung Yoon Jinho Lee Kisuk Kang Ki-Seok An Chunjoong kim Seokwoo Jeon Department of Materials Science and Engineering Advanced Battery CenterKorea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea Department of Materials Science and Engineering Chungnam National UniversityDaejeon34134Republic of Korea Thin Film Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon34114Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea

Various redox-active organic molecules can serve as ideal electrode materials to realize sustainable energy storage systems. Yet, to be more appropriate for practical use, considerable architectural engineering of an ultrathick, high-loaded organic electrode with reliable electrochemical performance is of crucial importance. Here, by utilizing the synergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes (NOGFs) and introduction of mechanically robust cellulose nanofiber (CNF)-intermingled structure, a very thick (≈ 1 mm), freestanding organic nanohybrid electrode which ensures the superiority in cycle stability and areal capacity is reported. The well-developed ion/electron pathways throughout the entire thickness and the enhanced kinetics of electrochemical reactions in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (DMPZ-NC) cathodes lead to the high areal energy of 9.4 mWh·cm−2 (= 864 Wh·kg−1 at 158 W·kg−1). This novel ultrathick electrode architecture provides a general platform for the development of the high-performance organic battery electrodes.

关键词： energy storage organic electrodes batteries graphene cellulose nanofibers

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fundamental principles and development of proximity-field nanopatterning toward advanced 3D nanofabrication

引用

Nano Research 2021年第9期14卷 2965-2980页

作者： Sang-Hyeon Nam Gayea Hyun Donghwi Cho Seonggon Han Gwangmin Bae Haomin Chen Kisun kim youngjin Ham Junyong Park Seokwoo Jeon Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina School of Materials Science and Engineering Kumoh National Institute of TechnologyGumiGyeongbuk 39177Republic of Korea Department of Energy Engineering Convergence Kumoh National Institute of TechnologyGumiGyeongbuk 39177Republic of Korea KAIST Institute for NanoCentury(KINC) KAISTDaejeon 34141Republic of Korea

Three-dimensional(3D)nanoarchitectures have offered unprecedented material performances in diverse applications like energy storages,catalysts,electronic,mechanical,and photonic *** outstanding performances are attributed to unusual material properties at the nanoscale,enormous surface areas,a geometrical uniqueness,and comparable feature sizes with optical *** the practical use of the unusual nanoscale properties,there have been developments for macroscale fabrications of the 3D nanoarchitectures with process areas over centimeter *** the many fabrication methods for 3D structures at the nanoscale,proximity-field nanopatterning(PnP)is one of the promising techniques that generates 3D optical holographic images and transforms them into material structures through a lithographic *** conformal and transparent phase masks as a key factor,the PnP process has advantages in terms of stability,uniformity,and reproducibility for 3D nanostructures with periods from 300 nm to several *** merits of realizing precise 3D features with sub-100 nm and rapid processes are attributed to the interference of coherent light diffracted by phase *** this review,to report the overall progress of PnP from 2003,we present a comprehensive understanding of PnP,including its brief history,the fundamental principles,symmetry control of 3D nanoarchitectures,material issues for the phase masks,and the process area expansion to the wafer-scale for the target ***,technical challenges and prospects are discussed for further development and practical applications of the PnP technique.

关键词： proximity-field nanopatterning three-dimensional(3D)nanostructures phase mask interference lithography

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Anti-angiogenic effects of the water extract of HangAmDan(WEHAD),a Korean traditional medicine

引用

Science China(Life Sciences) 2011年第3期54卷 248-254页

作者： BANG Ji-Young kim Kyung-Soon kim Eung-Yoon YOO Hwa-Seung LEE Yeon-Weol CHO Chong-Kwan CHOI youngjin JEONG Hyun-Ja KANG In-Cheol InnoPharmasceen Inc. Hoseo UniversityAsan 336-795Republic of Korea East-West Cancer Center Dunsan Oriental Medical Hospital of Daejeon UniversityDaejeon 302-122Republic of Korea BioChip Research Center Hoseo UniversityAsan 336-795Republic of Korea Department of Biological Science College of Natural ScienceHoseo UniversityAsan 336-795Republic of Korea

We investigated the anti-angiogenic effects of the water extract of HangAmDan (WEHAD),which is a crude extract of nine Korean medicinal substances of animal and plant *** human umbilical vein endothelial cells,WEHAD significantly inhibited bFGF-induced proliferation,adhesion,migration,and capillary tube *** used an antibody array to perform an analysis of signaling proteins,which showed up-regulated expression of various proteins including RAD51,RAD52,and p73,and down-regulated expression of *** vessel formation in a chick chorioallantoic membrane (CAM) treated with WEHAD was markedly reduced in length compared with a PBS-treated control *** results suggest that inhibition of angiogenesis by WEHAD may be the mechanism of action for the anti-cancer effects of HAD.

关键词： angiogenesis HangAmDan WEHAD antibody array HUVEC

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Krill oil ameliorates benign prostatic hyperplasia by regulating G-phase cell cycle arrest and altering signaling pathways and benign prostatic hyperplasia-associated markers

引用

Food Science and Human Wellness 2023年

作者： Hoon kim Jongyeob kim Byungdoo Hwang Sang Yong Park Ji-Yeon Shin Eun Byeol Go Jae Sil kim youngjin Roh Soon Chul Myung Seok-Joong Yun Yung Hyun Choi Wun-Jae kim Sung-Kwon Moon Department of Biochemistry， College of Oriental Medicine， Dongeui University Institute of Urotech， Cheongju Department of Urology， Chungbuk National University， Cheongju SD Biotechnologies， 66 Magojungang 8-ro 1-gil， Gangseo-gu Department of Food and Nutrition， Chung-Ang University Department of Urology， College of Medicine， Chung-Ang University

Krill oil (KO) exhibits various biological activities， such as anti-inflammatory and antitumor effects. However， the inhibitory effects of benign prostatic hyperplasia (BPH) in vitro and in vivo have not yet been studied. This study investigated the anti-BPH effects of KO extracted by an enzymatic hydrolysis method. KO treatment inhibited the proliferation of WMPY-1 and BPH-1 cells by induction of G0/G1phase arrest through the modulation of positive and negative regulators in both prostate cell types. KO treatment stimulated phosphorylation of JNK and p38 signaling. In addition， KO changed the expression of BPH-related markers (5α-reductase， androgen receptor， FGF， Bcl-2， and Bax) and the activity of the proliferation-mediated NF-κB binding motif. KO-induced levels of proliferation-mediated molecules of prostate cells were attenuated in the presence of siRNA-specific p-38 (si-p38) and JNK (si-JNK). Furthermore， the administration of KO alleviated prostate size and weight and the cell layer thickness of prostate glands in a testosterone enanthate-induced BPH rat model. KO treatment altered the level of dihydrotestosterone in serum and the expression levels of BPH-related markers in prostate tissues. Finally， KO-mediated inhibition of prostatic growth was validated by histological analysis. These results suggest that KO has an inhibitory effect on BPH in prostate cells in vitro and in vivo. Thus， KO might be a potential prophylactic or therapeutic agent for patients with BPH.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：