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Dynamic Channel Allocation by Using Allocation Function in PCS

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Dynamic Channel Allocation by Using Allocation Function in P...

Two-stage dynamic recrystallization and texture evolution in Al-7Mg alloy during hot torsion

亚太地区通信会议暨光电子通信会议

作者： kwang moon cho AIN(Advanced Intelligent Network)Software Lab. SAMSUNG Electronics Co. Ltd.Samsung Plaza 18E.263 SeoHyun-Dong BunDang-Gu SeongNam KyungKi Korea 463-050

In this paper a dynamic channel allocation method applicable tothe microcell system like as PCS is *** factors for the quality of channels are *** function that consists of these factors has *** channel allocation for a call is processed by usingthe function *** a channel is being allocated to a call,the adequate quality channel is used instead of the best *** probability of call blocking is decreased even inthe cells having the high traffic load.

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1900-1911页

作者： kwang Tae Son Chang Hee cho Myoung Gyun Kim Ji Woon Lee School of Mechanical Industrialand Manufacturing EngineeringOregon State UniversityCorvallis OR 97331USA Department of Materials Science Engineering Northwestern UniversityEvanston IL 60208USA Research Institute of Industrial Science and Technology(RIST) Pohang 37673Rep.of Korea Division of Advanced Materials Engineering Kongju National UniversityCheonan 31080Rep.of Korea Center for Advanced Materials and Parts of Powders Kongju National UniversityCheonan 31080Rep.of Korea

Hot torsion tests were performed on the Al-7Mg alloy at the temperature ranging from 300 to 500℃ and strain rates between 0.05 and 5 s^(-1) to explore the progressive dynamic recrystallization(DRX)and texture *** DRX behavior of the alloy manifested two distinct stages:Stage 1 at strain of≤2 and Stage 2 at strains of≥*** Stage 1,there was a slight increase in the DRXed grain fraction(X_(DRX))with predominance of discontinuous DRX(DDRX),followed by a modest change in X_(DRX) until the transition to Stage *** 2 was marked by an accelerated rate of DRX,culminating in a substantial final X_(DRX) of~*** backscattered diffraction(EBSD)analysis on a sample in Stage 2 revealed that continuous DRX(CDRX)predominantly occurred within the(121)[001]grains,whereas the(111)[110]grains underwent a geometric DRX(GDRX)evolution without a noticeable sub-grain ***,a modified Avrami’s DRX kinetics model was utilized to predict the microstructural refinement in the Al-7Mg alloy during the DRX *** this kinetics model did not accurately capture the DDRX behavior in Stage 1,it effectively simulated the DRX rate in Stage *** texture index was employed to assess the evolution of the texture isotropy during hot-torsion test,demonstrating significant improvement(>75%)in texture randomness before the commencement of Stage *** initial texture evolution is attributed to the rotation of parent grains and the substructure evolution,rather than to an increase in X_(DRX).

关键词： Al-7Mg alloys hot deformation hot torsion tests dynamic recrystazlliation microstructure texture

Surface-functionalized hole-selective monolayer for high efficiency single-junction wide-bandgap and monolithic tandem perovskite solar cells

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Journal of Energy Chemistry 2024年第1期88卷 317-326,I0008页

作者： Devthade Vidyasagar Yeonghun Yun Jae Yu cho Hyemin Lee Kyung Won Kim Yong Tae Kim Sung Woong Yang Jina Jung Won Chang choi Seonu Kim Rajendra Kumar Gunasekaran Seok Beom Kang kwang Heo Dong Hoe Kim Jaeyeong Heo Sangwook Lee School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and Engineering and Optoelectronics Convergence Research CenterChonnam National UniversityGwangju 61186Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea

Carbazole moiety-based 2PACz([2-(9H-carbazol-9-yl)ethyl]phosphonic acid)self-assembled monolayers(SAMs)are excellent hole-selective contact(HSC)materials with abilities to excel the charge-transferdynamics of perovskite solar cells(PSCs).Herein,we report a facile but powerful method to functionalize the surface of 2PACz-SAM,by which reproducible,highly stable,high-efficiency wide-bandgap PSCs can be *** 2PACz surface treatment with various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM,which increases perovskite grain size,retards halide segregation,and accelerates hole *** surface functionalization achieves a high power conversion efficiency(PCE)of 17.62%for a single-junction wide-bandgap(~1.77 e V)*** also demonstrate a monolithic all-perovskite tandem solar cell using surfaceengineered HSC,showing high PCE of 24.66%with large open-circuit voltage of 2.008 V and high fillfactor of 81.45%.Our results suggest this simple approach can further improve the tandem device,when coupled with a high-performance narrow-bandgap sub-cell.

关键词： Perovskite solar cells 2PACz Monolithic tandem solar cells Wide bandgap

Multi-Generator Discriminator Network Using Texture-Edge Information

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Computers, Materials & Continua 2023年第5期75卷 3537-3551页

作者： Kyeongseok Jang Seongsoo cho kwang Chul Son Department of Plasma Bio Display Kwangwoon University20Gwangun-roNowon-guSeoul01897Korea School of Software Soongsil University369Sangdo-roDongjak-guSeoul06978Korea Department of Information Contents Kwangwoon University20Gwangun-roNowon-guSeoul01897Korea

In the proposed paper,a parallel structure type Generative Adversarial Network(GAN)using edge and texture information is *** the existing GAN-based model,many learning iterations had to be given to obtaining an output that was somewhat close to the original data,and noise and distortion occurred in the output image even when learning was *** solve this problem,the proposed model consists of two generators and three discriminators to propose a network in the form of a parallel *** the network,each edge information and texture information were received as inputs,learning was performed,and each character was combined and outputted through the Combine *** this,edge information and distortion of the output image were improved even with fewer iterations than DCGAN,which is the existing GAN-based *** a result of learning on the network of the proposed model,a clear image with improved contour and distortion of objects in the image was output from about 50,000 iterations.

关键词： Deep learning convolution neural network generative adversarial network edge information texture information

Newly-modeled graphene-based ternary nanocomposite for the magnetophotocatalytic reduction of CO_(2) with electrochemical performance

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Frontiers of Chemical Science and Engineering 2022年第10期16卷 1438-1459页

作者： Zambaga Otgonbayar kwang Youn cho chong-Hun Jung Won-Chun Oh Department of Advanced Materials Science&Engineering Hanseo UniversitySeosan-Si 31962Korea Korea Institutes of Ceramic Engineering and Technology Jinju-Si 660031Korea Decommissioning Technology Research Division Korea Atomic Energy Research InstituteDaejeon 305-600Korea Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health College of Materials Science and EngineeringAnhui University of Science&TechnologyHuainan 232001China

The development of CO_(2)into hydrocarbon fuels has emerged as a green method that could help mitigate global *** novel structured photocatalyst is a promising material for use in a photocatalytic and magneto-electrochemical method that fosters the reduction of CO_(2)by suppressing the recombination of electron−hole pairs and effectively transferring the electrons to the surface for the chemical reaction of CO_(2)*** our study,we have developed a novel-structured AgCuZnS_(2)–graphene–TiO_(2)to analyze its catalytic activity toward the selective evolution of CO_(2).The selectivity of each nanocomposite substantially enhanced the activity of the AgCuZnS_(2)–graphene–TiO_(2)ternary nanocomposite due to the successful interaction,and the selectivity of the final product was improved to a value 3 times higher than that of the pure AgCuZnS_(2)and 2 times higher than those of AgCuZnS_(2)–graphene and AgCuZnS_(2)–TiO_(2)under ultraviolet(UV)-light(λ=254 nm)irradiation in the photocatalytic *** electrochemical CO_(2)reduction test was also conducted to analyze the efficacy of the AgCuZnS_(2)–graphene–TiO_(2)when used as a working electrode in laboratory electrochemical *** electrochemical process was conducted under different experimental conditions,such as various scan rates(mV·s^(–1)),under UV-light and with a 0.07 T *** evolution of CO_(2)substantially improved under UV-light(λ=254 nm)and with 0.07 T magnetic-core treatment;these improvements were attributed to the facts that the UV-light activated the electron-transfer pathway and the magnetic core controlled the pathway of electrontransmission/prevention to protect it from chaotic electron *** all tested nanocomposites,AgCuZnS_(2)–graphene–TiO_(2)absorbed the CO_(2)most strongly and showed the best ability to transfer the electron to reduce the CO_(2)to *** believe that our newly-modeled ternary nanocomposite opens up new opportunities for the evolution of C

关键词： ternary nanocomposite photocatalytic electrochemical CO_(2) reduction UV-light magnetic core

Dietary sophorolipid accelerates growth by modulation of gut microbiota population and intestinal environments in broiler chickens

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Journal of Animal Science and Biotechnology 2022年第1期13卷 256-264页

作者： Min-Jin Kwak Min-Young Park Yong-Soon choi Junghwan cho Duleepa Pathiraja Jonggun Kim Hanbae Lee In-Geol choi kwang-Youn Whang Department of Biotechnology Korea University145 Anam-roSeoul 02841Republic of Korea Pathway Intermediates Seoul 02841Republic of Korea

Background:Gut is a crucial organ for the host’s defense system due to its filtering action of the intestinal membrane from hazardous foreign *** strategy to strengthen the gut epithelial barrier function is to upregulate beneficial microflora populations and their ***(SPL),which is a glycolipid biosurfactant,could increase beneficial microflora and decrease pathogenic bacteria in the gastrointestinal ***,herein,we conducted an experiment with broiler chickens to investigate the fortifying effects of SPL on the host’s gut defense system by modulating the microbiota ***:A total of 5401-day-old chicks(Ross 308)were used,and they were immediately allotted into three treatment groups(6 replications with 30 chicks/pen)according to their initial body *** dietary treatments consisted of CON(basal diet),BAM(10 mg/kg bambermycin),and SPL(10 mg/kg SPL).During the experiment,birds freely accessed feed and water,and body weight and feed intake were measured at the end of each *** d 35,birds(one bird/pen)were sacrificed to collect jejunum and cecum ***:Dietary SPL and BAM supplementation significantly accelerated birds’growth and also significantly improved feed efficiency compared to *** microbial community was significantly separated by dietary SPL supplementation from that of CON,and dietary SPL supplementation significantly increased Lactobacillus *** Akkermansia ***,birds fed with dietary SPL also showed the highest concentration of cecal butyrate among all treatment *** morphological analysis showed that dietary SPL significantly increased villus height,ratio of villus height to crypt depth,goblet cell numbers,and the gene expression levels of claudin-1 and mucin ***,dietary SPL significantly decreased the mRNA expression level of pro-inflammatory cytokine,interleukin-6,and increased that of anti-inflammatory cytokine,interleukin-10,compared

关键词： Broilers Gut microbiota Gut morphology Local inflammation Mucus barrier Sophorolipids

Stereotactic body radiotherapy for isolated paraaortic lymph node recurrence from colorectal cancer

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World Journal of Gastroenterology 2009年第48期15卷 6091-6095页

作者： Mi-Sook Kim Chul Koo cho kwang Mo Yang Dong Han Lee Sun Mi moon Young Joo Shin Department of RadiationOncology and Surgery Korea Institute of Radiological & Medical Sciences

AIM:To evaluate the efficacy and complications of stereotactic body radiotherapy in localized paraaortic lymph node recurrence from colorectal ***:From 2003 to 2009,7 patients with paraaortic lymph node recurrence(1-3 lesions)from colorectal cancer were treated with stereotactic body *** gross tumor volumes ranged from 4 to 40 *** doses were escalated from 36 Gy/patient to 51 Gy/patient and were delivered in 3 ***:One and 3 year overall survival rates were 100%and 71.4%,respectively,and median survival was 37 ***Ⅳintestinal obstruction was reported in 1 of 7 *** patient received 48 Gy in 3 fractions with a maximum point dose to the intestine of 53 Gy and V45Gy=3.6 ***,6 patients received an intestinal maximum point dose of<51 Gy and V45Gy of<1 mL,and did not develop any severe ***:This pilot study suggests selected paraaortic lymph node recurrence(1-3 closed lesions) that failed to respond to chemotherapy can be potentially salvaged by stereotactic body radiotherapy.

关键词：放射治疗立体定向腹主动脉淋巴结大肠癌机构复发分离

SYNCRIP controls miR-137 and striatal learning in animal models of methamphetamine abstinence

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Acta Pharmaceutica Sinica B 2022年第8期12卷 3281-3297页

作者： Baeksun Kim Sung Hyun Tag Eunjoo Nam Suji Ham Sujin Ahn Juhwan Kim Doo-Wan cho Sangjoon Lee Young-Su Yang Seung Eun Lee Yong Sik Kim Il-Joo cho kwang Pyo Kim Su-Cheol Han Heh-In Im Convergence Research Center for Diagnosis Treatment and Care System of Dementia(DTC)Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Division of Bio-Medical Science&Technology KIST SchoolKorea University of Science and Technology(UST)Seoul 02792Republic of Korea Center for Neuroscience KISTSeoul 02792Republic of Korea Animal Model Research Center Jeonbuk Department of Inhalation ResearchKorea Institute of Toxicology(KIT)Korea Research Institute of Chemical Technology(KRICT)Jeongeup 56212Republic of Korea Research Animal Resource Center KISTSeoul 02792Republic of Korea Department of Pharmacology Seoul National University College of MedicineSeoul 03080Republic of Korea Center for BioMicrosystems KISTSeoul 02792Republic of Korea Department of Applied Chemistry Kyung Hee UniversityGyeonggi-do 17104Republic of Korea

Abstinence from prolonged psychostimulant use prompts stimulant withdrawal *** adaptations within the dorsal striatum have been considered the main hallmark of stimulant abstinence. Here we explored striatal miRNA-target interaction and its impact on circulating miRNA marker as well as behavioral dysfunctions in methamphetamine(MA) abstinence. We conducted miRNA sequencing and profiling in the nonhuman primate model of MA abstinence, followed by miRNA qPCR,LC-MS/MS proteomics, immunoassays, and behavior tests in mice. In nonhuman primates, MA abstinence triggered a lasting upregulation of miR-137 in the dorsal striatum but a simultaneous downregulation of circulating miR-137. In mice, aberrant increase in striatal miR-137-dependent inhibition of SYNCRIP essentially mediated the MA abstinence-induced reduction of circulating miR-137. Pathway modeling through experimental deduction illustrated that the MA abstinence-mediated downregulation of circulating miR-137 was caused by reduction of SYNCRIP-dependent miRNA sorting into the exosomes in the dorsal striatum. Furthermore, diminished SYNCRIP in the dorsal striatum was necessary for MA abstinence-induced behavioral bias towards egocentric spatial learning. Taken together, our data revealed circulating miR-137 as a potential blood-based marker that could reflect MA abstinence-dependent changes in striatal miR-137/SYNCRIP axis, and striatal SYNCRIP as a potential therapeutic target for striatum-associated cognitive dysfunction by MA withdrawal syndrome.

关键词： Methamphetamine Abstinence Withdrawal Striatum miR-137 SYNCRIP Biomarker Behavior

Global parameter estimation of the Cochlodinium polykrikoides model using bioassay data

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Acta Oceanologica Sinica 2016年第2期35卷 39-45页

作者： cho Hong-Yeon PARK kwang-Soon KIM Sung Coastal and Environmental Engineering Division Korea Institute of Ocean Science and Technology Coastal Disaster Research Center Korea Institute of Ocean Science and Technology Biological Oceanography and Marine Biology Division Korea Institute of Ocean Science and Technology

Cochlodinium polykrikoides is a notoriously harmful algal species that inflicts severe damage on the aquacultures of the coastal seas of Korea and Japan. Information on their expected movement tracks and boundaries of influence is very useful and important for the effective establishment of a reduction plan. In general, the information is supported by a red-tide（a.k.a algal bloom） model. The performance of the model is highly dependent on the accuracy of parameters, which are the coefficients of functions approximating the biological growth and loss patterns of the C. polykrikoides. These parameters have been estimated using the bioassay data composed of growth-limiting factor and net growth rate value pairs. In the case of the C. polykrikoides, the parameters are different from each other in accordance with the used data because the bioassay data are sufficient compared to the other algal species. The parameters estimated by one specific dataset can be viewed as locally-optimized because they are adjusted only by that dataset. In cases where the other one data set is used, the estimation error might be considerable. In this study, the parameters are estimated by all available data sets without the use of only one specific data set and thus can be considered globally optimized. The cost function for the optimization is defined as the integrated mean squared estimation error, i.e., the difference between the values of the experimental and estimated rates. Based on quantitative error analysis, the root-mean squared errors of the global parameters show smaller values, approximately 25%–50%, than the values of the local parameters. In addition, bias is removed completely in the case of the globally estimated parameters. The parameter sets can be used as the reference default values of a red-tide model because they are optimal and representative. However, additional tuning of the parameters using the in-situ monitoring data is highly *** opposed to the bioassay d

关键词： global and local estimation gain and loss parameters Cochlodinium polykrikoides bioassay data model performance