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Foreground Extraction in Thermal Videos Based on Selective Histogram Bins
Gwang-Hyun Yu(유광현),Muhammd Zaigham Zaheer(자히르),Jin-Young Kim(김진영),Do-Seong Sin(신도성) 한국디지털콘텐츠학회 2018 한국디지털콘텐츠학회논문지 Vol.19 No.4
Foreground extraction is the most significant step in thermal imaging based surveillance systems. This step needs to be efficient in terms of time and memory consumption in order for the system to provide real time results but usually this efficiency reciprocates with the accurateness of the ROI detection. In this study, novel selective histogram bins based two background & foreground separation approaches for thermal videos processing have been proposed which exploit the temporal-consistency property of the thermal images in a given environment and can save over 80% memory than their simplest counterpart temporal median filtering.
국산자연 Cheese의 숙성기간에 따른 휘발성유이지방산(揮發性遊離脂肪酸)에 관한 연구
유제현,지의상,차광종 한국낙농학회 1983 韓國酪農學會誌 Vol.5 No.2
本 實驗은 國內에서 生産되고 있는 natural cheese를 熟成期間 15日 간격으로 試料를 採取하여 pH, 總揮發酸量 및 GLC에 의한 揮發性遊離脂 肪酸을 分析, 比較하여 熟成期間에 따른 風味成分의 變化를 觀察함으로써 cheese 風味改善의 基礎的 資料를 마련하기 위해 實施하였으며 그 結果를 要約하면 다음과 같다. 1. pH는 熟成初期에는 6.2이었으나 15일 以後부터 90일까지는 5.0으로 거의 일정하게 維持하였다. 2. 熟成 0, 15, 30, 45, 60, 75, 90일의 總揮發酸量은 시료 100g당 各各 6.45±0.08㎖, 7.98±0.68㎖, 9.48±0.11㎖, 10.30±0.26㎖, 10.03±0.36㎖, 10.76±0.55㎖, 10.97±0.58㎖로 나타났는데 熟成期間동안 대체적으로 增加함을 알 수 있었다. 3. GLC에 의한 揮性叢離賠防酸 含量에서는 acetic acid는 熟成初期에 22.92%로 比較的 적은 量을 나타냈으나 15일 以後 급격히 增加하여 거의 半을 차지 하였으며 butyric acid는 熟成初期 31.56%로 가장 많은 量을 보였으나 그 以後 점차 減少하여 60일에 17.28%로 나타났다가 다시 增加 趨勢를 보였다. Caproic acid는 熟成初期 9.7%로 적은 量을 나타냈으나 그 以後 약간의 增加와 減少를 되풀이 했으며, caprylic acid는 熟成初期 0.1%로 가장 적게 나타났으나 그 後 30일까지 10.32%로 급격히 增加한 後 서서히 增加 傾向을 보였고, 나머지 物質은 微量으로서 거의 變化가 없었다. This experiment was carried out to get the informations of pH, total volatile fatty acid, and volatile free fatty acid in domestic natural cheese, and conducted comparision of the substances, and the changes of the tastes along the ripening period. The results obtained were summarized as follows: 1. pH, in the early period of ripening, was 6.2, however it was maintained at pH 5.0 after 15 days until 90 days. 2. The total volatile fatty acid contents during ripening after 0, 15, 30, 45, 60, 75, and 90 days were 6.45±0.08㎖, 7.98±0.68㎖, 9.48±0.11㎖, 10.30±0.26㎖, 10.03±0.36㎖, 10.76±0.55㎖, and 10.97±0.58㎖, and the increasing tendency was evidenced during the ripening period. 3. The acetic acid appeared in the early period during ripening 22.92% of the total, however, after 15 days it increased rapidly and amounted to almost the half of the total; while butyric acid was produced in large amounts (31.5% of the total) in its early ripening period, which tended to decrease gradually later until it reached to 17.28% by 60 days; and then it tended to increase. Caproic acid appeared in small annount (9.7% of total) in its early ripening period, however later it increased then decreased, and caprylic acid was produced in the least quantity (0.1%) in the early ripening period, however it rapidly increased up to 10.32% of the total after 30 days, and again increased gradually and the other and minor acids gave not much variation in the amount produced.
Pyridazine derived bipolar host materials for phosphorescent organic light-emitting diodes
Yu, Ji Gwang,Han, Si Hyun,Jeon, Hak Rim,Chung, Ho Kyoon,Lee, Jun Yeob Elsevier 2018 Journal of luminescence Vol.194 No.-
<P><B>Abstract</B></P> <P>Two organic materials incited by electron deficiency of a pyridazine moiety were designed for application as bipolar host materials of phosphorescent organic light-emitting diodes. Modification of the pyridazine moiety with carbazole and pyrrolocarbazole hole transport units provided 3,6-bis(2-(9<I>H</I>-carbazol-9-yl)phenyl)pyridazine (CzPd) and 3,6-bis(2-(3-phenylpyrrolo[3,2-<I>a</I>]carbazol-10(3H)-yl)phenyl)pyridazine (PCzPd) as bipolar host materials. The 3,6-bis(2-(9<I>H</I>-carbazol-9-yl)phenyl)pyridazine and 3,6-bis(2-(3-phenylpyrrolo[3,2-<I>a</I>]carbazol-10(3<I>H</I>)-yl)phenyl)pyridazine were high triplet energy hosts by ortho- substitution of the hole transport units. Based on the triplet energy of the host materials, green phosphorescent organic light-emitting diodes were devised and the green devices presented high quantum efficiency of 15.5%</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Gwang-Sik Kim,Seung-Hwan Kim,Jeong-Kyu Kim,Changhwan Shin,Jin-Hong Park,Saraswat, Krishna C.,Byung Jin Cho,Hyun-Yong Yu IEEE 2015 IEEE electron device letters Vol.36 No.8
<P>We demonstrate Fermi-level unpinning and contact resistance reduction by surface passivation using SF<SUB>6</SUB> plasma treatment of a metal/germanium (Ge) contact. A specific contact resistivity (Pc) of 1.14 × 10<SUP>-3</SUP> Ω · cm<SUP>2</SUP> and 0.31 eV of Schottky barrier height is achieved for a Ti/SF<SUB>6</SUB>-treated n-type Ge (n-Ge) (Nd = 1 × 10<SUP>17</SUP> cm<SUP>-3</SUP>) contact, exhibiting 1700 times Pc reduction from a Ti/nontreated n-Ge contact. A convenient and effective passivation process of the Ge surface is presented to alleviate Fermi-level pinning at metal/Ge contact and lower source/drain contact resistance of Ge n-type field-effect transistors.</P>
Gwang-Sik Kim,Jeong-Kyu Kim,Seung-Hwan Kim,Jaesung Jo,Changhwan Shin,Jin-Hong Park,Saraswat, Krishna C.,Hyun-Yong Yu IEEE 2014 IEEE electron device letters Vol.35 No.11
<P>We demonstrate contact resistivity reduction by inserting an Ar plasma-treated TiO<SUB>2-x</SUB> heavily doped interfacial layer to metal/semiconductor contact to overcome a Fermi-level pinning problem on germanium (Ge). A specific contact resistivity of 3.16 × 10<SUP>-3</SUP>Ω · cm<SUP>2</SUP> on moderately doped n-type Ge substrate (6 × 10<SUP>16</SUP>cm<SUP>-3</SUP>) was achieved, exhibiting ×584 reduction from Ti/Ge structure, and ×11 reduction from Ti/undoped TiO<SUB>2</SUB>/Ge structure. A novel doping technique for TiO<SUB>2</SUB> interfacial layer at low temperature using Ar plasma was presented to lower S/D contact resistance in Ge n-MOSFET.</P>
Yu Da Yoon,Oh Sang-Hyon,Kim In Sung,Kim Gwang Il,Kim Jeong A,문양수,Jang Jae Cheol,Lee Sang Suk,Jung Jong-Hyun,Park Hwa Chun,Cho Kwang Keun 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.1
Objective: In this study, we investigated the effects of Rubus coreanus-derived lactic acid bacteria (LAB) fermented feed (RC-LAB fermented feed) and three types of LAB (Lactobacillus plantarum, Lactobacillus acidophilus, Bifidobacterium animalis) on the expression of transcription factors and cytokines in Th1, Th2, Th17, and Treg cells in the intestinal lymph nodes and spleens of rats. In addition, the effect on intestinal microbiota composition and body weight was investigated. Methods: Five-week-old male rats were assigned to five treatments and eight replicates. The expression of transcription factors and cytokines of Th1, Th2, Th17, and Treg cells in the intestinal lymph nodes and spleens was analyzed using real-time reverse transcriptase polymerase chain reaction assays. Intestinal tract microbiota compositions were analyzed by next-generation sequencing and quantitative polymerase chain reaction assays. Results: RC-LAB fermented feed and three types of LAB increased the expression of transcription factors and cytokines in Th1, Treg cells and Galectin-9, but decreased in Th2 and Th17 cells. In addition, the intestinal microbiota composition changed, the body weight and Firmicutes to Bacteroidetes (F/B) ratio decreased, and the relative abundance of LAB increased. Conclusion: LAB fermented feed and three types of LAB showed an immune modulation effect by inducing T cell polarization and increased LAB in the intestinal microbiota.