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An Asynchronous Clustering and Mobile Data Gathering Schema Based on Timer Mechanism in Wireless Sensor Networks

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Computers, Materials & Continua 2019年第3期58卷 711-725页

作者： Jin Wang Yu Gao Wei Liu Wenbing Wu Se-jung lim Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation School of Computer&Communication EngineeringChangsha University of Science&TechnologyChangsha410114China School of Information Science and Engineering Fujian University of TechnologyFuzhou350000China College of Information Engineering Yangzhou UniversityYangzhou225000China Department of Computer Engineering Chonnam National UniversityYeosu596597Korea.

Recently,Wireless sensor networks(WSNs)have become very popular research topics which are applied to many *** provide pervasive computing services and techniques in various potential applications for the Internet of Things(IoT).An Asynchronous Clustering and Mobile Data Gathering based on Timer Mechanism(ACMDGTM)algorithm is proposed which would mitigate the problem of“hot spots”among sensors to enhance the lifetime of *** clustering process takes sensors’location and residual energy into consideration to elect suitable cluster ***,one mobile sink node is employed to access cluster heads in accordance with the data overflow time and moving time from cluster heads to *** experimental results display that the presented method can avoid long distance communicate between sensor ***,this algorithm reduces energy consumption effectively and improves package delivery rate.

关键词： Internet of things wireless sensor networks clustering mobile data collection timer.

SPL3/4/5 Integrate Developmental Aging and Photoperiodic Signals into the FT-FD Module in Arabidopsis Flowering

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Molecular Plant 2016年第12期9卷 1647-1659页

作者： Jae-hoon jung Hyo-Jun Lee Jae Yong Ryu Chung-Mo Park Sainsbury Laboratory University of Cambridge Cambridge CB2 1LR UK Department of Chemistry plant Genomics and Breeding Institute Seoul National University Seou1151-742 Korea These authors contributed equally to this article

Environmental sensitivity varies across developmental phases in flowering plants. In the juvenile phase, mi- croRNA156 （miR156）-mediated repression of SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE （SPL） transcription factors renders Arabidopsis plants incompetent to floral inductive signals, including long- day （LD） photoperiod. During the vegetative phase transition, which accompanies a reduction of miR156 and a concomitant elevation of its targets, plants acquire reproductive competence such that LD signals promote flowering. However, it remains largely unknown how developmental signals are associated with photoperiodic flowering. Here, we show that SPL3, SPL4, and SPL5 （SPL3/4/5） potentiate the FLOWERING LOCUS T （FT）-FD module in photoperiodic flowering. SPL3/4/5 function as transcriptional activators through the interaction with FD, a basic leucine zipper transcription factor which plays a critical role in photoperiodic flowering. SPL3/4/5 can directly bind to the promoters of APETALA1, LEAFY, and FRUITFULL, thus mediating their activation by the FT-FD complex. Our findings demonstrate that SPL3/ 4/5 act synergistically with the FT-FD module to induce flowering under LDs, providing a long-sought mo- lecular knob that links developmental aging and photoperiodic flowering.

关键词： photoperiodic flowering developmental aging SPL transcription factors FT-FD complex

Macroscopic Ag nanostructure array patterns with high-density hotspots for reliable and ultra-sensitive SERS substrates

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Nano Research 2019年第10期12卷 2554-2558页

作者： Taeksu Lee Soongeun Kwon San ghee jung Hyungjun lim Jae-Jong Lee Department of Nano Manufacturing Technology Korea Institute of Machinery and Materials(KIMM)156 Gajeongbuk-RoYuseong-GuDaejeon 34103Republic of Korea

Syn thesis of metal nano structures arrays with large amounts of small nano-gaps on a homoge nous macroscale is of significant in terest and importa nee in chemistry,biotech no logy,physics,and nan otech no logy because of their enhan ced ***,the fabricatio n of uncovered nano-gaps with high-density and uniformity is rather difficult due to the complex and multiple synthetic *** this research,a facile and low-cost approach is demonstraind for the synthesis of high-density small nano-gaps(about 3.4 nm)between silver nanostructure array patter ns(SNAPs)over a large *** nan o?hole patter ns were periodically gen erated over an entire substrate using nano-impri nt *** reacti on at the high over-potential produced multiple silver nano crystals inside the nano-hole patter ns,gen erati ng a high-de nsity of small and un covered ***,we fully dem on strate their applicati on in the rapid detectio n of rhodamine 6G(R6G)molecules by surface-enhaneed Raman scattering(SERS)spectroscopy with a very low detection limit(1 fM)as well as excellent signal uniformity(RSD<8.0%±2.5%),i ndicati ng an extra ordinary capability for single-molecule detecti on.

关键词： nanoImprint lithography surface-enhanced Raman scattering(SERS)spectroscopy electrodeposition nano patterning gold silver

Arabidopsis ABF3 and ABF4 Transcription Factors Act with the NF-YC Complex to Regulate SOC1 Expression and Mediate Drought-Accelerated Flowering

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Molecular Plant 2019年第4期12卷 489-505页

作者： Keumbi Hwang Hendry Susila Zeeshan Nasim Ji-Yul jung Ji hoon Ahn Department of Life Sciences Korea University Anamro 145 Seongbuk-Gu Seoul 02841 South Korea

The drought-escape response accelerates flowering in response to drought stress, allowing plants to adaptively shorten their life cycles. Abscisic acid (ABA) mediates plant responses to drought, but the role of ABA-responsive element (ABRE)-binding factors (ABFs) in the drought-escape response is poorly understood. Here, we show that Arabidopsis thaliana ABF3 and ABF4 regulate flowering in response to drought through transcriptional regulation of the floral integrator SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1). The abf3 abf4 mutant displayed ABA-insensitive late flowering under long-day conditions. Ectopic expression of ABF3 or ABF4 in the vasculature, but not in the shoot apex, induced early flowering, whereas expression of ABF3 fused with the SRDX transcript!onal repressor domain delayed flowering. We identified SOC1 as a direct downstream target of ABF3/4, and found that SOC1 mRNA levels were lower in abf3 abf4 than in wild-type plants. Moreover, induction of SOC1 by ABA was hampered in abf3 abf4 mutants. ABF3 and ABF4 were enriched at the -1028- to -657-bp region of the SOC1 promoter, which does not contain canonical ABF-ABRE-binding motifs but has the NF-Y binding element. We found that ABF3 and ABF4 interact with nuclear factor Y subunit C (NF-YC) 3/4/9 in vitro and in planta, and induction of SOC1 by ABA was hampered in nf-yc3 yc4 yc9 mutants. Interestingly, the abf3 abf4, nf-yc3 yc4 yc9, and sod mutants displayed a reduced drought-escape response. Taken together, these results suggest that ABF3 and ABF4 act with NF-YCs to promote flowering by inducing SOC1 transcription under drought conditions . This mechanism might contribute to adaptation by enabling plants to complete their life cycles under drought stress.

关键词： drought escape abscisic acid ABF3 ABF4 NF-YC SOC1

Comparison of magnetic properties of DNA-cetyltrimethyl ammonium complex with those of natural DNA

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Science China Chemistry 2012年第5期55卷 814-821页

作者： KWON Young-Wan CHOI Dong hoon JIN jung-Il LEE Chang hoon KOH Eui Kwan GROTE James G. Department of Chemistry Korea University Seoul 136-701 Korea Department of Polymer Science & Engineering Chosun University Gwangju 501-759 Korea Korea Basic Science Institute-Seoul Branch Korea University Seoul 136-701 Korea US Air Force Research Laboratory Materials and Manufacturing Directorate AFRL/MLPS Wright-Patterson Air Force Base Ohio USA

We prepared the DNA-cetyltrimethyl ammonium complex, as well as the same complex intercalated with stable organic free radicals, and studied their magnetic properties by electron magnetic resonance (EMR) spectroscopy and by measuring the magnetization on a superconducting quantum interference device (SQUID). The UV-vis and CD spectra of DNA-quaternary alkyl ammonium complex (DNA--Q+) in organic solvent clearly demonstrated that it retained the double helical B-form conformation. The interhelical spacing of double strand DNA (dsDNA) increased when the counter ions (Na+) of phosphate groups of the natural DNA were replaced with the long alkyl quaternary ammonium groups. The inter-helical distance of DNA-cetyltrimethyl ammonium (CTMA) was 39.1  as confirmed by X-ray diffractometry. In general, the magnetization of the DNA-CTMA complex solid was found to be significantly lower than that of natural DNA. Moreover, intercalation of the complex with stable organic free radicals did not improve magnetization, which again was in marked contrast to natural DNA. EMR spectroscopic behavior of the complex in the solid state also was quite different from that of natural DNA: The unique broad EMR signal of natural DNA in the low field region with g-value greater than 10 disappeared in the DNA-CTMA complex.

关键词：十六烷基三甲基铵双链DNA 天然磁学性质超导量子干涉器件有机自由基 CD光谱电子病历

Deduction of a meteorological phenology indicator from reconstructed MODIS LST imagery

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Journal of Forestry Research 2020年第6期31卷 2205-2216页

作者： Chi Hong lim Song Hie jung Nam Shin Kim Chang Seok Lee Department of Bio and Environmnetal Technology Graduate SchoolSeoul Women’s UniversitySeoul Republic of Korea Research Team on Ecological and Natural Map National Institute of EcologySeocheon Choongnam Republic of Korea Department of Bio and Environmnetal Technology Seoul Women’s UniversitySeoul Republic of Korea

Phenology is a valuable attribute of vegetation to assess the biological impacts from climate change.A challenge of phenological research is to obtain information on both high temporal resolution and fine spatial scale ***,we constructed an air temperature map based on temporal merging and spatial interpolation algorithms to overcome the cloud-related problem from the MODIS LST ***,we derived the accumulated growing degree days(AGDD)from the constructed mean air temperature map to use as a meteorological ***,we verified the indicator with the seasonal mean air temperature and the green-up date of a Quercus mongolica forest determined from the field-based *** AGDD threshold for each *** forest when the first leaf has unfolded was detected from the EXG trajectory extracted from digital camera images.A comparison between meteorological and MODIS-derived AGDD showed good agreement between *** was also high consistency between DoYs extracted from AGDD and EVI based on curvature K for *** forests of 30 sampling sites throughout South *** results prove that microclimatic factors such as elevation,waterbody,and land-use intensity were faithfully reflected in the reconstructed ***,the results of this study could be applied effectively in areas where microclimatic variation is very severe and for monitoring phenology of undergrowth,which is difficult to detect from reflectance imaging.

关键词： Climate change Digital camera Growing degree days MODIS Phenology Quercus mongolica

Extracorporeal shock wave therapy treatment of painful hematoma in the calf:A case report

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World Journal of Clinical Cases 2020年第24期8卷 6511-6516页

作者： Ji Won jung Hyeon Seong Kim jung Ho Yang Kyu hoon Lee Si-Bog Park Department of Rehabilitation Medicine Hanyang University HospitalSeoul 04763South Korea

BACKGROUND Extracorporeal shock wave therapy (ESWT) can be applied to variousmusculoskeletal conditions including calcific tendinitis. Muscle injuries can leadto hematomas, and unabsorbed hematomas sometimes cause pain. We report acase of painful hematoma successfully treated with ESWT. To our knowledge, thisis the first reported case of painful intramuscular hematoma treated with *** SUMMARY A 65-year-old man visited the outpatient department for left calf pain withswelling that had persisted since he slipped two weeks prior. The calf pain hadpersisted and was rated visual analog scale 7. On physical examination, there wasa localized, stiff, ovoid mass on his left upper posterior calf. The pain wasaggravated by dorsiflexion of the left ankle or weight-bearing on the left *** diagnostic ultrasonography showed a hematoma in the left gastrocnemiusmuscle;its texture was firm with low heterogeneity. We applied ESWT to thehematoma. His pain decreased immediately to a visual analog scale 3, and themass was softened. The texture of the hematoma became more heterogeneous onultrasonography. Due to planned overseas travel, he returned three months afterthe initial visit to report that the pain and swelling were dramatically relievedafter *** We propose that painful hematomas could be a new indication for ESWT. Furtherinvestigation on the effects of ESWT for hematomas is needed.

关键词： Extracorporeal shock wave therapy Hematoma Ultrasonography Indication Pain Case report

Verification and Correction of Cloud Base and Top Height Retrievals from Ka–band Cloud Radar in Boseong,Korea

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Advances in Atmospheric Sciences 2016年第1期33卷 73-84页

作者： Su-Bin OH Yeon-Hee KIM Ki-hoon KIM Chun-Ho CHO Eunha lim Numerical Data Application Division National Institute of Meteorological Sciences KMA Republic of Korea Applied Meteorology Research Division National Institute of Meteorological Sciences KMA Republic of Korea Observation Research Division National Institute of Meteorological Sciences KMA Republic of Korea National Institute of Meteorological Sciences KMA Republic of Korea

In this study,cloud base height（CBH） and cloud top height（CTH） observed by the Ka-band（33.44 GHz） cloud radar at the Boseong National Center for Intensive Observation of Severe Weather during fall 2013（September-November） were verified and *** comparative verification,CBH and CTH were obtained using a ceilometer（CL51） and the Communication,Ocean and Meteorological Satellite（COMS）.During rainfall,the CBH and CTH observed by the cloud radar were lower than observed by the ceilometer and COMS because of signal attenuation due to raindrops,and this difference increased with rainfall *** dry periods,however,the CBH and CTH observed by the cloud radar,ceilometer,and COMS were *** and low-density clouds were observed more effectively by the cloud radar compared with the ceilometer and *** cases of rainfall or missing cloud radar data,the ceilometer and COMS data were proven effective in correcting or compensating the cloud radar *** corrected cloud data were used to classify cloud types,which revealed that low clouds occurred most frequently.

关键词： cloud radar ceilometer satellite retrieval cloud base height cloud top height cloud type

Thermal performance analysis of borehole size effect on geothermal heat exchanger

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Journal of Central South University 2012年第12期19卷 3524-3529页

作者： CHOI hoon-ki YOO Geun-jong lim Kyung-bin LEE Sang-hoon LEE Chang-hee Department of Mechanical Design and Manufacturing Engineering Changwon National UniversityChangwon 641-773Korea Department of Mechanical Design Engineering Hanbat National UniversityDaejon 305-719Korea Department of Energy Engineering Jeonju UniversityJeonju 560-759Korea STX Institute of Technology Changwon 642-845Korea

Thermal performance was the most important factor in the development of borehole heat exchanger utilizing geothermal *** thermal performance was affected by many different design parameters,such as configuration type and borehole size of geothermal heat *** eventually determined the operation and cost efficiency of the geothermal heat exchanger *** main purpose of this work was to assess the thermal performance of geothermal heat exchanger with variation of borehole sizes and numbers of U-tubes inside a *** this,a thermal response test rig was established with line-source *** thermal response test was performed with in-line variable input heat *** thermal conductivity and thermal resistance were obtained from the measured *** the measurement,the effective thermal conductivity is found to have similar values for twopair type(4 U-tubes)and three-pair type(6 U-tubes)borehole heat exchanger systems indicating similar heat transfer ***,the thermal resistance shows lower value for the three-pair type compared to the two-pair *** data based resistance have lower value compared to computed result from design *** comparison finds better thermal performance for the three-pair type,however,fluctuating temperature variation indicates complex flow behavior inside the borehole and requires further study on flow characteristics.

关键词：热性能分析地热换热器尺寸效应井眼换热器系统配置类型设计参数热交换器