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Towards 6G Hyper-Connectivity: Vision, Challenges, and Key Enabling Technologies
Lee, Howon,Lee, Byungju,Yang, Heecheol,Kim, Junghyun,Kim, Seungnyun,Shin, Wonjae,Shim, Byonghyo,Poor, H. Vincent 한국통신학회 2023 Journal of communications and networks Vol.25 No.3
Technology forecasts anticipate a new era in whichmassive numbers of humans, machines, and things are connectedto wireless networks to sense, process, act, and communicatewith the surrounding environment in a real-time manner. Tomake the visions come true, the sixth generation (6G) wirelessnetworks should be hyper-connected, implying that there areno constraints on the data rate, coverage, and computing. Inthis article, we first identify the main challenges for 6G hyper-connectivity, including terabits-per-second (Tbps) data rates forimmersive user experiences, zero coverage-hole networks, andpervasive computing for connected intelligence. To overcomethese challenges, we highlight key enabling technologies for6G such as distributed and intelligence-aware cell-free mas-sive multi-input multi-output (MIMO) networks, boundless andfully integrated terrestrial and non-terrestrial networks, andcommunication-aware distributed computing for computation-intensive applications. We further illustrate and discuss thehyper-connected 6G network architecture along with open issuesand future research directions.
Lee, Dong-Geol,Park, Ji-Min,Kang, Heecheol,Hong, So-Young,Lee, Kyung Real,Chang, Hung-Bae,Trujillo, Martha E. International Union of Microbiological Societies 2013 International journal of systematic and evolutiona Vol.63 No.9
<P>A novel bacterial strain, designated LCJ02<SUP>T</SUP>, was isolated on R2A agar from donkey (<I>Equus asinus</I>) milk powder and subjected to a taxonomic study using a polyphasic approach. Strain LCJ02<SUP>T</SUP> showed a Gram-negative reaction, was non-motile, non-spore-forming and possessed rod-shaped cells and yellow-pigmented colonies. Phylogenetic analysis based on 16S rRNA gene sequences showed that the novel isolate formed a cluster with several uncultured bacterial clones and with cultured members of the genera <I>Hydrotalea</I>, <I>Sediminibacterium</I> and <I>Lacibacter</I> (family <I>Chitinophagaceae</I>, phylum <I>Bacteroidetes</I>). The gene sequence similarities with respect to the type strains of recognized species from the above genera and other phylogenetic neighbours ranged from 89.3 to 92.9 %. The G+C content of the genomic DNA was 49.2 mol%, the only isoprenoid quinone was MK-7 and the major fatty acids were iso-C<SUB>15 : 0</SUB>, iso-C<SUB>17 : 0</SUB> 3-OH, iso-C<SUB>15 : 1</SUB> G and summed feature 3 (C<SUB>16 : 1</SUB>ω7<I>c</I> and/or iso-C<SUB>15 : 0</SUB> 2-OH). The major polar lipids of strain LCJ02<SUP>T</SUP> were phosphatidylethanolamine, two unidentified aminophospholipids, one unidentified aminolipid and five unidentified lipids. The results of physiological and biochemical tests allowed phenotypic differentiation of strain LCJ02<SUP>T</SUP> from its closest phylogenetic neighbours. On the basis of the evidence of this polyphasic study, isolate LCJ02<SUP>T</SUP> represents a novel genus and species in the family <I>Chitinophagaceae</I> for which the name <I>Asinibacterium lactis</I> gen. nov., sp. nov. is proposed. The type strain is LCJ02<SUP>T</SUP> ( = KCCM 90108<SUP>T</SUP> = JCM 18484<SUP>T</SUP>).</P>
이승훈 ( Seunghun Lee ),김은종 ( Eunjong Kim ),이명성 ( Myeongseong Lee ),김대훈 ( Daehun Kim ),위지수 ( Jisoo Wi ),신진호 ( Jinho Shin ),노희철 ( Heecheol Roh ),안희권 ( Heekwon Ahn ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.1
본 연구는 톱밥깔짚 우사에서 사육되는 착유우의 분뇨 발생량 평가 및 적정 깔짚(톱밥) 교체시점을 구명하기 위한 목적으로 수행되었다. 가축분뇨 자원화 표준설계도를 참고해 깔짚 두께를 10cm로 조성한 후 평균체중 약 605 kg 착유우 총 6마리를 210 ㎡ 면적 우방에서 62일간(1월~3월) 사육하였다. 일일 두당 평균 9.8 kg 배합사료와 평균 23.3 kg 조사료를 급여(DMI 30.1 kg)하였으며, 물은 자동급수장치를 통해 자율적으로 음수할 수 있도록 하였다. 시료는 균일성 확보를 위해 우방 내 다지점에서 골고루 섞어준 후 채취하였으며, 2주 간격으로 분뇨 Map을 작성하여 우방 내 젖소의 배설습성 또한 분석하였다. 실험 종료 후 분뇨와 깔짚 혼합물의 무게는 스키드로더와 로드셀을 사용하여 측정하였다. 젖소분뇨와 톱밥 혼합물의 발생량은 두당 일일 44.0 kg 발생되었으며, 톱밥깔짚을 제외한 순수 분뇨는 일일 두당 32.3 kg 발생되었다. 본 연구 결과는 2008년도에 제시된 착유우 분뇨 발생원단위(76.3±6.0 kg)에 비해 약 42% 적은 수준을 보였다. 이는 기존 고시된 젖소분뇨 발생원단위는 대사틀을 이용하여 분뇨가 장시간 상온과 대기에 노출됨에 따라 발생하는 수분증발과 유기물분해 같은 환경적 요인이 배제되었기 때문이라고 사료된다. 실험 14일 후, 사료조와 급수조 주변의 경우 분뇨와 깔짚 혼합물의 함수율이 70%이상 도달하였으며, 57일 경과 후에는 함수율 70% 이상인 분뇨와 톱밥 혼합물이 우방 면적의 절반을 차지하였다.
유시현,Sung Hyun Lee,Seunghwan Lee,Jae Hong Park,Seunghyeon Lee,Heecheol Jin,Hue Jung Park 대한통증학회 2020 The Korean Journal of Pain Vol.33 No.1
Background: Neuropathic pain (NP) is considered a clinically incurable condition despite various treatment options due to its diverse causes and complicated disease mechanisms. Since the early 2000s, multipotent human mesenchymal stem cells (hMSCs) have been used in the treatment of NP in animal models. However, the effects of hMSC injections have not been studied in chronic post-ischemia pain (CPIP) mice models. Here, we investigated whether intrathecal (IT) and intrapaw (IP) injections of hMSCs can reduce mechanical allodynia in CPIP model mice. Methods: Seventeen CPIP C57/BL6 mice were selected and randomized into four groups: IT sham (n = 4), IT stem (n = 5), IP sham (n = 4), and IP stem (n = 4). Mice in the IT sham and IT stem groups received an injection of 5 μL saline and 2 × 104 hMSCs, respectively, while mice in the IP sham and IP stem groups received an injection of 5 μL saline and 2 × 105 hMSCs, respectively. Mechanical allodynia was assessed using von Frey filaments from pre-injection to 30 days post-injection. Glial fibrillary acidic protein (GFAP) expression in the spinal cord and dorsal root ganglia were also evaluated. Results: IT and IP injections of hMSCs improved mechanical allodynia. GFAP expression was decreased on day 25 post-injection compared with the sham group. Injections of hMSCs improved allodynia and GFAP expression was decreased compared with the sham group. Conclusions: These results suggested that hMSCs may be also another treatment modality in NP model by ischemia-reperfusion.
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이현열,정희철,신창호,최환수 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-
Biometrics has been getting more interests in the recent decade as a method of personal identification system. It identifies a person by recognizing the unique physiological or behavioral characteristics of a person. As a new biometric system, finger crease pattern identification system is under development. For the algorithm, the extraction of exact finger area is essential. In this paper, a new boundary tracking algorithm for extracting finger area, which can be utilized by a finger crease pattern recognition algorithm, is proposed. Due to noise and irregular illumination, conventional algorithms for boundary tracking such as skeleton-based tracking methods were not suitable for typical image of hand, So I proposed a finger boundary tracking algorithm utilizing a boundary-point-detection mask. We have observed that the proposed method provides stable and optimized boundary tracking.
Pseudogulbenkiania gefcensis sp. nov., isolated from soil.
Lee, Dong-Geol,Im, Dong-Moon,Kang, HeeCheol,Yun, Pyeong,Park, Sun-Ki,Hyun, Seung-Su,Hwang, Dong-Youn Society for General Microbiology 2013 International journal of systematic and evolutiona Vol.63 No.1
<P>A novel strain, yH16, was isolated on nutrient agar from soil samples collected at KyungHee University, Suwon City, Republic of Korea. Cells of strain yH16(T) were short rods, Gram-negative-staining, motile and non-spore-forming, with a polar flagellum. Biochemical and molecular characterization revealed that this strain was most similar to Pseudogulbenkiania subflava BP-5(T). Further 16S rRNA gene sequencing studies revealed that the new strain clustered with Pseudogulbenkiania subflava BP-5(T) (95.9 % similarity), Paludibacterium yongneupense 5YN8-15(T) (95.2 % similarity), Gulbenkiania mobilis E4FC31-5(T) (94.6 % similarity) and Chromobacterium aquaticum CC-SE-YA-1(T) (93.9 % similarity). The isolate was able to grow at 25-40 C, 0.3-2 % NaCl and pH 5.5-7. The DNA G+C content was 65.9 1.0 mol%. The predominant fatty acids were summed feature 3 (C(16 : 1)ω7c and/or iso-C(15 : 0) 2-OH) and C(16:0). Ubiquinone 8 was the major respiratory quinone. It was evident from the data obtained that the strain should be classified as a novel species of the genus Pseudogulbenkiania. The name proposed for this taxon is Pseudogulbenkiania gefcensis sp. nov., and the type strain is yH16(T) (=KCCM 90100(T) = JCM 17850(T)).</P>