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Observation of Single-Photon Switching [article]

Yong-Fan Chen, Zen-Hsiang Tsai, Yu-Chen Liu, Ite A. Yu
2005 arXiv   pre-print
[23] and Braje et * Electronic address: al. [10] , and its transient behavior in a simple four-state system has been studied by Chen et al. [24] .  ... 
arXiv:physics/0501155v1 fatcat:jrjfkd5stzf7bgx6yqfvs6satm

Ramsey number of fans [article]

Guantao Chen, Xiaowei Yu, Yi Zhao
2020 arXiv   pre-print
The latest result for Ramsey number r(F m , F n ) is due to Zhang, Broersma and Chen [13] , who proved that r(F m , F n ) = 4n + 1 if n ≥ max{(m 2 − m)/2, 11m/2 − 4}.  ...  Inspired by these old and recent results on r(nK 3 ) and r(B (k) n ), in this paper we study the Ramsey number of fans.  ... 
arXiv:2007.00152v1 fatcat:mnipdfx3zrbhtnrg35lb3yante

Lasing in blood

Yu-Cheng Chen, Qiushu Chen, Xudong Fan
2016 Optica  
Indocyanine green (ICG) is the only near-infrared dye approved by the U.S. Food and Drug Administration for clinical use. When injected in blood, ICG binds primarily to plasma proteins and lipoproteins, resulting in enhanced fluorescence. Recently, the optofluidic laser has emerged as a novel tool in bio-analysis. Laser emission has advantages over fluorescence in signal amplification, narrow linewidth, and strong intensity, leading to orders of magnitude increase in detection sensitivity and
more » ... aging contrast. Here we successfully demonstrate, to the best of our knowledge, the first ICG lasing in human serum and whole blood with the clinical ICG concentrations and the pump intensity far below the clinically permissible level. Furthermore, we systematically study ICG laser emission within each major serological component (albumins, globulins, and lipoproteins) and reveal the critical elements and conditions responsible for lasing. Our work marks a critical step toward eventual clinical and biomedical applications of optofluidic lasers using FDA approved fluorophores, which may complement or even supersede conventional fluorescence-based sensing and imaging.
doi:10.1364/optica.3.000809 pmid:29308428 pmcid:PMC5754027 fatcat:kbp4nlermrgehahxtblscbyjne

Performance Of Piezoelectric Cooling Fan With Rectangular Blade

Thomas Jin-Chee Liu, Yu-Shen Chen
2016 Zenodo  
When the fan works at its natural frequency, the vibrating displacement is largest and the cooling performance is best.  ...  Due to the vibration behavior, the cooling performance is affected by the geometry, material property, and working frequency of the piezoelectric cooling fan.  ... 
doi:10.5281/zenodo.1111847 fatcat:j2vgjgdlzvguvpthjrkrwsn2qy

Silencing sounds off

Yu-Fan Chen, Marc R Gartenberg
2015 eLife  
Second, reporter genes placed within silent chromatin can be artificially prodded toward expression during certain stages Copyright Chen and Gartenberg.  ... 
doi:10.7554/elife.06717 pmid:25730674 pmcid:PMC4345821 fatcat:awj73l7tlnca3pq7w5zlrrz5da

Anticipation and Negative Group Delay in a Retina [article]

Po-Yu Chou, Jo-Fan Chien, Kevin Sean Chen, Yu-Ting Huang, Chun-Chung Chen, C. K. Chan
2020 arXiv   pre-print
Chen et al [10] showed in an extension to OSR that a retina can also distinguish between stochastic pulses generated by a hidden Markov model (HMM) and an Ornstein-Uhlenbeck (OU) process by producing  ... 
arXiv:2011.04967v1 fatcat:x6cglvip7veh5opklfn5pj6thm

Phase-dependent double-Λ electromagnetically induced transparency [article]

Yi-Hsin Chen, Pin-Ju Tsai, Ite A. Yu, Ying-Cheng Chen, Yong-Fan Chen
2014 arXiv   pre-print
We theoretically investigate a double-Λ electromagnetically induced transparency (EIT) system. The property of the double-Λ medium with a closed-loop configuration depends on the relative phase of the applied laser fields. This phase-dependent mechanism differentiates the double-Λ medium from the conventional Kerr-based nonlinear medium, e.g., EIT-based nonlinear medium discussed by Harris and Hau [Phys. Rev. Lett. 82, 4611 (1999)], which depends only on the intensities of the applied laser
more » ... ds. Steady-state analytical solutions for the phase-dependent system are obtained by solving the Maxwell-Bloch equations. In addition, we discuss efficient all-optical phase modulation and coherent light amplification based on the proposed double-Λ EIT scheme.
arXiv:1409.4153v1 fatcat:kby64gzy3zdqldyr6sbstljfty

Robust Federated Learning with Noisy Communication [article]

Fan Ang, Li Chen, Nan Zhao, Yunfei Chen, Weidong Wang, F. Richard Yu
2019 arXiv   pre-print
Chen extended to deep learning platforms, which was known as federated learning [4] , [6] .  ...  Yu is with the Department of Systems and Computer Engineering, Carleton University, Ottawa, ON, K1S 5B6, Canada (email:  ... 
arXiv:1911.00251v1 fatcat:g4gsblqccvaaldix7wzklralyq

Optofluidic chlorophyll lasers

Yu-Cheng Chen, Qiushu Chen, Xudong Fan
2016 Lab on a Chip  
Dual band lasing from an optofluidic chlorophyll laser
doi:10.1039/c6lc00512h pmid:27220992 pmcid:PMC4899220 fatcat:pprcrxqphzdvvfrtffnls5no7q

Study on the Removal Efficiency of Heavy Metals in Flue Gas of Small Sintering Machines [chapter]

Yu Chen, Fan Zhang, Yu Liu, Chen Zhang, Gang Tian, Jinwei Zhu, Fan Wang, Yun Shu, Hongchang Wang, Huasheng Wang
2021 Advances in Transdisciplinary Engineering  
CHEN, Fan ZHANG, Yu LIU, Chen ZHANG, Gang TIAN, Jinwei ZHU, Fan WANG1, Yun SHU, Hongchang WANG and Huasheng WANG Chinese Research Academy of Environmental Sciences, Beijing 100012, China  ...  doi:10.3233/ATDE210324 tudy on the Removal Efficiency of Heavy Metals in Flue Gas of Small Sintering Machines Yu  ... 
doi:10.3233/atde210324 fatcat:rjl7sabrnvbojnca4fmcvziamu

Snowmass2021 Whitepaper: Muonium to antimuonium conversion [article]

Ai-Yu Bai, Yu Chen, Yukai Chen, Rui-Rui Fan, Zhilong Hou, Han-Tao Jing, Hai-Bo Li, Yang Li, Han Miao, Huaxing Peng, Alexey A. Petrov, Jing-Yu Tang (+10 others)
2022 arXiv   pre-print
The spontaneous muonium to antimuonium conversion is one of the interesting charged lepton flavor violation processes. It serves as a clear indication of new physics and plays an important role in constraining the parameter space beyond Standard Model. MACE is a proposed experiment to probe such a phenomenon and expected to enhance the sensitivity to the conversion probability by more than two orders of magnitude from the current best upper constraint obtained by the PSI experiment two decades
more » ... go. Recent developments in the theoretical and experimental aspects to search for such a rare process are summarized.
arXiv:2203.11406v1 fatcat:zkb65jypirg6pgzuvfcck2zw7y

variant2literature: full text literature search for genetic variants [article]

Yin-Hung Lin, Yu-Chen Lu, Jacob Shujui Hsu, Ko-Han Lee, Yi-Wei Cheng, Yi-Chieh Chen, Ting-Fu Chen, Jhih-Sheng Fan, Chien-Ta Tu, Chen-Ming Hsu, Chih-Chen Chou, Pei-Lung Chen (+2 others)
2019 bioRxiv   pre-print
AbstractMotivationWhole genome sequencing (WGS) by next-generation sequencing produces millions of variants for an individual. The retrieval of biomedical literature for such a large number of genetic variants remains challenging, because in many cases the variants are only present in tables as images, or in the supplementary documents of which the file formats are diverse.ResultsThe proposed tool named variant2literature from the TaiGenomics (Toolkits for AI genomics) resolves the problem by
more » ... corporating text recognition with image processing. In addition to the adoption of advanced text retrieval, the recall rate of finding the literature containing the variants of interest is further improved by employing the skill of variant normalization. Different variant presentations are transformed into chromosome coordinates (standard VCF format) such that false negatives can be largely avoided. variant2literature is available in two ways. First, a web-based interface is provided to search all the literature in PMC Open Access Subset. Second, the command-line executable can be downloaded such that the users are free to search all the files in a specified directory locally.Availability
doi:10.1101/583450 fatcat:mt4fv74fobd4naeyhancn37pr4

Large Cross-Phase Modulations at the Few-Photon Level

Zi-Yu Liu, Yi-Hsin Chen, Yen-Chun Chen, Hsiang-Yu Lo, Pin-Ju Tsai, Ite A. Yu, Ying-Cheng Chen, Yong-Fan Chen
2016 Physical Review Letters  
Yu; correspondence and requests for material of this work can be addressed to Yong-Fan Chen. We also acknowledge the support from NCTS of Taiwan.  ...  We acknowledge Hao-Chung Chen, Bing He, You-Lin Chuang, and Ray-Kuang Lee for helpful discussions and Jun-Jie Wu for experimental assistance.  ... 
doi:10.1103/physrevlett.117.203601 pmid:27886497 fatcat:oboxiy2lx5brngiijwlam54vie

Landslides affecting sedimentary characteristics of reservoir basin

Chien-Yuan Chen, Lien-Kuang Chen, Fan-Chieh Yu, Sheng-Chi Lin, Yu-Ching Lin, Chou-Lung Lee, Yu-Ting Wang
2009 Environmental Earth Sciences  
The coarse sediment content is transported by bed load; and middle size of sediment moving by suspended load, and the fine contents by wash load to the reservoir (Yu et al. 2000) .  ...  is lower than that of other reservoirs in Taiwan, the disasters induced by high suspend sediment have raised the issues of soil and water conservation in the upland and the importance of management (Chen  ... 
doi:10.1007/s12665-009-0151-0 fatcat:cscekzskhvccxfbiilwe3yynbq

Revisit the Correlation between the Elastic Mechanics and Fusion of Lipid Membranes

Zih-An Fan, Kuan-Yu Tsang, Si-Han Chen, Yi-Fan Chen
2016 Scientific Reports  
Membrane fusion is a vital process in key cellular events. The fusion capability of a membrane depends on its elastic properties and varies with its lipid composition. It is believed that as the composition varies, the consequent change in C 0 (monolayer spontaneous curvature) is the major factor dictating fusion, owing to the associated variation in G E s (elastic energies) of the fusion intermediates (e.g. stalk). By exploring the correlations among fusion, C 0 and K cp (monolayer bending
more » ... lus), we revisit this long-held belief and re-examine the fusogenic contributions of some relevant factors. We observe that not only C 0 but also K cp variations affect fusion, with depression in K cp leading to suppression in fusion. Variations in G E s and inter-membrane interactions cannot account for the K cp -fusion correlation; fusion is suppressed even as the G E s decrease with K cp , indicating the presence of factor(s) with fusogenic importance overtaking that of G E . Furthermore, analyses find that the C 0 influence on fusion is effected via modulating G E of the pre-fusion planar membrane, rather than stalk. The results support a recent proposition calling for a paradigm shift from the conventional view of fusion and may reshape our understanding to the roles of fusogenic proteins in regulating cellular fusion machineries. where K cp is the monolayer bending modulus, C the total curvature, C 0 the monolayer spontaneous curvature (the molar-weighted average of the C 0 s of the constituting lipids), K G the Gaussian modulus and G the Gaussian curvature 11,12 . When free of any external constraint, a monolayer of a specific C 0 tends to form a structure with C = C 0 . Any deviation of C from C 0 increases g E , destabilizes the monolayer structure possessing the given C and raises the energy barrier to the formation of this structure. Accordingly, a monolayer having |C 0 | > > 0 exhibits a high tendency of forming nonlamellar structures, with the sign of the C 0 indicating its preference for normal (positive) or inverted (negative) nonlamellar structures, while monolayers with |C 0 | ≈ 0 prefer a planar conformation. The energy barriers, and thus the fusion capability, can be reduced/raised by tuning the membrane composition. Experiments show that adjusting the composition of a ULV alters its fusion capability considerably, which is attributable to the consequent changes in g E and/or hydration repulsion 6,13 . Conventionally, the former is considered as the major factor affecting fusion and is induced by introducing to membranes the lipids of negative C 0 s, because hemifusion stalk, whose existence has been experimentally confirmed 14 , is a structure with negative Cs for the cis-monolayers (Fig. 1) . Nevertheless, varying C 0 is merely one approach to change g E ; varying K cp can be another, as manifested in Equation (1). While many efforts have been dedicated to exploring the effects of varying C 0 on fusion and their underlying mechanisms, few, if any, take on the issue of how, or even whether, the change in K cp affects the energy barriers and thus fusion of a membrane, even though such investigations will surely provide further insight. Moreover, a recent X-ray study demonstrated the need to shift the conventional "C 0 -centered" view on fusion because hydration repulsion was proven as energetically important as g E , if not more so, to fusion 6 . It is therefore of great value to re-examine the fusogenic importance of elastic mechanics and explore the fusogenic relevance of other factors. This study aspires to address these issues and provide further insight on the fusion mechanisms of protein-free lipid membranes, in the hope that the learned knowledge will advance our understanding to the working principles general to fusogenic proteins. Several experimental techniques (e.g., X-ray diffraction, the electron density reconstruction and fluorescence spectroscopy) have been employed and an experimental scheme (specifically for the K cp measurements) developed to measure 1) the C 0 s and K cp s of several lipid species [i.e., the species carrying 18 carbon-long tails of various saturation degrees: dioleoylphosphatidylethanolamine (DOPE or 18:1 PE), 18:2 PE, 18:3 PE, dioleoylphosphatidylcholine (DOPC or 18:1 PC), 18:2 PC and 18:3 PC] and 2) the fusion efficiencies of ~150-nm ULVs (i.e., large unilamellar vesicles, LUVs) as functions of C 0 and K cp via tuning the lipid composition. To the best of our knowledge, the measurements are the first systematic investigation on the correlations among C 0 , K cp , the hydrocarbon (CH) chain saturation of a lipid and fusion. Energetic analyses on the C 0 -and K cp -dependences of fusion reveal the fusogenic relevance of a factor(s) other than elastic mechanics and inter-membrane interactions, whose fusogenic importance even overtakes that of C 0 and G E , and also provide a new energetic perspective on how fusion is promoted by making C 0 more negative. The results complement the earlier studies by expanding the known effects of changing the lipid composition on the fusion energetics, and may reshape the current understanding to the fusion mechanism.
doi:10.1038/srep31470 pmid:27534263 pmcid:PMC4989284 fatcat:4nv277cvwna2lkfjytxhytzpwa
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