http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
MEMS/Nano-technologies for Smart Air Environmental Monitoring Sensors
( Inkyu Park ),( Daejong Yang ),( Kyungnam Kang ) 한국센서학회 2015 센서학회지 Vol.24 No.5
The importance of air quality monitoring is rapidly increasing. Even though state-of-the-art air quality monitoring technologies such as mass spectrometry, gas chromatography, and optical measurement enable high-fidelity measurement of air pollutants, they cannot be widely used for portable or personalized platforms because of their high cost and complexity. Recently, personalized and localized environmental monitoring, rather than global and averaged environmental monitoring, has drawn greater attention with the advancement of mobile telecommunication technologies. Here, micro- and nano-technologies enable highly integrated and ultra-compact sensors to meet the needs of personalized environmental monitoring. In this paper, several examples of MEMS-based gas sensors for compact and personalized air quality monitoring are explained. Additionally, the principles and usage of functional nanomaterials are discussed for highly sensitive and selective gas sensors.
( Inkyu Park ) 한국센서학회 2017 센서학회지 Vol.26 No.6
Human body motion detection is important in several industry sectors, such as entertainment, healthcare, rehabilitation, and so on. In this paper, we first discuss commercial human motion detection technologies (optical markers, MEMS acceleration sensors, infrared imaging, etc.) and then explain recent advances in the development of flexible and stretchable strain sensors for human motion detection. In particular, flexible and stretchable strain sensors that are fabricated using carbon nanotubes, silver nanowires, graphene, and other materials are reviewed.
Dissection of Korean landrace chamoe (Cucumis melo var. makuwa) genome
Inkyu Park,Jae-Pil Choi,Jungeun Kim,Jeongyeo Lee,Soohwan Lim,Mi-Ye Lee,Hey-Ran Kim 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
The oriental melon (C. melo var. makuwa), called ‘Chamoe’ in Korean, is a popular fruit crop cultivated mainly in Asia and a high–market value crop in Korea. To provide a genomic resource as a reference genome for the Cucurbitaceae crop improvement, we performed whole genome sequencing of Korean landrace, Gotgam chamoe. We used Illumina HiSeq2000 sequencing platform to generate 89 Gb (205X) of paired and mate pair sequence reads. The pre-processed reads were de novo assembled resulting in 4,764 scaffolds with a N50 scaffold length of 249kb. This assembly represented 379.8Mb which was 84.7% of the 448Mb of the whole genome. The assembled draft was predicted 26,634 genes of which 80% were predicted by known protein or C. melo unigene homology. Approximately 20% of predicted genes were hypothetical. A total of 1,885 non-coding RNA was detected including rRNA. The transposable elements were accounted for 21% (71.6Mb) of the total assembly. All the marker candidates including SSR, INDEL, SNP were mined and presented. The draft genome will provide a useful platform for genomic research and improvement for Cucurbitacea crops.
Top-down fabricated silicon nanowire sensors for real-time chemical detection
Park, Inkyu,Li, Zhiyong,Pisano, Albert P,Williams, R Stanley IOP Pub 2010 Nanotechnology Vol.21 No.1
<P>Silicon nanowire (SiNW) sensors have been developed by using top-down fabrication that is CMOS (complementary metal–oxide–semiconductor) compatible for resistive chemical detection with fast response and high sensitivity. Top-down fabrication by electron beam lithography and reactive ion etching of a silicon on insulator (SOI) substrate enables compatibility with the CMOS fabrication process, accurate alignment with other electrical components, flexible design of the nanowire geometry and good control of the electrical characteristics. The SiNW sensors showed a large operation range for pH detection (pH = 4–10) with an average sensitivity of (Δ<I>R</I>/<I>R</I>)/pH = 2.6%/pH and a rise time of 8 s. A small pH level difference (ΔpH = 0.2) near neutral pH conditions (pH = 7) could be resolved with the SiNW sensors. The sensor response to the presence of alkali metal ions and the long term drifting effects were also investigated. </P>
Construction and characterization of Squash and Oriental melon BAC libraies
InKyu Park,JeongYeo Lee,EunHee Han,OkHee Cho,HyeRan Kim 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Cucumis melo L. is an economically important crop. Genetically, Cucumis melo and Cucurbita maxima belong to Cucurbitaceae family, however, genetic characteristics such as genome size and stress tolerance, are different. To provide genomic resources for the Cucurbitaceae crop improvement, we constructed two bacterial artificial chromosome (BAC) libraries for oriental melon (Gotgam chamoe) and squash (Cucurbita Maxima), named ‘Gotgamchamoe BACH1’ and ‘Maxma BACH1’, respectively. Three hundred eighty four BACs were randomly selected and analyzed by Not I restriction enzyme digestion in order to evaluate the libraries in terms of insert size, empty clone ratio. Gotgamchamoe BACH1 was consisted of 92,160 BAC clones with an average insert size of 116kb ranging from 8 to 252kb. Maxima BACH1 was comprised 158,380 clones with an 116Kb of an average insert size ranging 8 to 305Kb. The both libraries were represented 20 haploid genome equivalents based on the reported genome sizes of 500Mb and 900Mb for Gotgamchamoe and maxima. The empty ratios of both libraries were 1.04 and 1.50% for Gotgamchamoe and maxima, respectively. These high quality BAC resources will provide a useful platform for genomic research and crop improvement for Cucurbitacea crops.
Feedback Bit Allocation Schemes for Multi-User Distributed Antenna Systems
Eunsung Park,Heejin Kim,Haewook Park,Inkyu Lee IEEE 2013 IEEE COMMUNICATIONS LETTERS Vol.17 No.1
<P>In this paper, we propose a feedback bit allocation algorithm for multi-user downlink distributed antenna systems with limited feedback. We consider a composite fading channel with small scale fadings and path loss, and assume the case where each user is served by only one distributed antenna (DA) port while each DA port can support any number of users. In order to efficiently determine bit allocation, we propose an iterative algorithm which minimizes an upper bound of a mean rate loss. Compared to conventional bit allocation methods, the proposed algorithm can be applied to more general system configurations. Simulation results show that our proposed algorithm offers a performance gain of 20% over an equal bit allocation scheme.</P>