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RISS 인기검색어
- 검색키워드
- 저자 : Kuan Peng (검색결과 14 건)
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Analysis of Bearing Capacity of Circular Concrete Filled CFRP-Steel Tubular Beam-Column
Kuan Peng,Yongbo Shao,Qingli Wang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.1
In practice, it is common for circular concrete-filled CFRP-steel tube (C-CF-CFRP-ST) member severing under eccentric load, but there are few related investigations on its mechanical behavior currently. In this study, experimental study and finite element analysis are employed to reveal the static behavior of circular concrete filled CFRP-steel tube under eccentric compression. Total 32 C-CF-CFRP-ST specimens, taking the slenderness ratio (λ) and eccentric ratio (e) as principal parameters, were designed and tested firstly, obtaining the failure modes, N-um curve and the strains in the steel tube and CFRP. It was found that the damage of concrete became more serious with the decrease of the slenderness ratio but got mitigated with the increase of eccentricity. Additionally, it was indicated that the N-um curve of C-CF-CFRP-ST consisted of three stages, namely elastic stage, elastic-plastic stage and plastic stage. In the elastic-plastic stage, the damage is gradually accumulated in CFRP and concrete, and the specimens finally exhibited ductile failure in the end of plastic stage. In the entire loading process, CFRP has almost same strains compared to the steel tube. Following the experimental study, finite element analysis was conducted to investigate the static behavior of C-CF-CFRP-ST comprehensively. The proposed finite element model reproduced the compressive behavior of C-CF-CFRP-ST, in terms of failure modes and N-um curves. The influence of material strength, layers of CFRP and steel ratio on the static behavior of C-CF-CFRP-ST specimens were then studied through numerical parametric study. In the end, equations for predicting the bearing capacity of C-CF-CFRP-ST are proposed, and the predicted static strengths of the specimens are basically consistent with the experimental results.
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Kuan Peng,Yong-Bo Shao,Qing-li Wang,Yi-Fang Cao 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.2
To study the hysteretic behavior of specimens of square concrete-fi lled CFRP-steel tube under diff erent infl uencing factors, a total of 12 specimens are designed, and the failure modes and P - Δ curves are investigated from experimental test. The simulation software ABAQUS is used to build the numerical model to study P - Δ curves and deformation mode of specimens. Based upon the tri-linear model, the restoring force model of square concrete-fi lled CFRP-steel tube is proposed, and the results of the tri-linear model are compared with those of the fi nite element model. The test results reveal that P - Δ curves of specimens are plump, and all specimens demonstrate excellent hysteretic behavior. The P - Δ curves, the skeleton curves and the deformation mode of specimens are reproduced by fi nite element model. The accuracy of the simulation results is verifi ed by comparing numerical results with experimental results. In terms of the restoring force model, a satisfactory agreement is achieved by comparing predicted results of tri-linear model with fi nite element simulations.
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MUTUAL FUND ADVERTISING AND FUND CONSUMER REDEMPTION BEHAVIOR
Kuan-Ling Lai,Miao-Ling Chen,Chi-Lu Peng 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.5
This study employs a trading dataset from a top investment bank in Taiwan to examine whether and how mutual fund advertising influences fund consumers’ redemption behavior, and whether the effect of advertising differs between small- and large-amount fund consumers. The evidence of this study shows that, on average, fund consumers redeem more non-advertised funds as their returns increase, while fund advertising slows their redemptions. The results from quantile regression show that fund advertising plays an important role in affecting redemption-performance sensitivity of large-amount and medium-amount investors. After taking advertising into account, large-amount and medium-amount investors reduce their fund redemptions. The results suggest that advertising, as a transmission of information, varies with investors’ wealth levels and that these differences in advertising matter to investors’ redemptions. This study contributes to understanding the role of advertising in fund consumers’ realized behavior and is useful for fund companies because they can more efficiently allocate limited resources such as advertising to support the growth of fund assets under management.
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Peng, Jinliang,Garcia, Mitch André,Choi, Jin-sil,Zhao, Libo,Chen, Kuan-Ju,Bernstein, James R.,Peyda, Parham,Hsiao, Yu-Sheng,Liu, Katherine W.,Lin, Wei-Yu,Pyle, April D.,Wang, Hao,Hou, Shuang,Tse American Chemical Society 2014 ACS NANO Vol.8 No.5
<P/><P>Substrate-mediated gene delivery is a promising method due to its unique ability to preconcentrate exogenous genes onto designated substrates. However, many challenges remain to enable continuous and multiround delivery of the gene using the same substrates without depositing payloads and immobilizing cells in each round of delivery. Herein we introduce a gene delivery system, nanosubstrate-mediated delivery (NSMD) platform, based on two functional components with nanoscale features, including (1) DNA⊂SNPs, supramolecular nanoparticle (SNP) vectors for gene encapsulation, and (2) Ad-SiNWS, adamantane (Ad)-grafted silicon nanowire substrates. The multivalent molecular recognition between the Ad motifs on Ad-SiNWS and the β-cyclodextrin (CD) motifs on DNA⊂SNPs leads to dynamic assembly and local enrichment of DNA⊂SNPs from the surrounding medium onto Ad-SiNWS. Subsequently, once cells settled on the substrate, DNA⊂SNPs enriched on Ad-SiNWS were introduced through the cell membranes by intimate contact with individual nanowires on Ad-SiNWS, resulting in a highly efficient delivery of exogenous genes. Most importantly, sequential delivery of multiple batches of exogenous genes on the same batch cells settled on Ad-SiNWS was realized by sequential additions of the corresponding DNA⊂SNPs with equivalent efficiency. Moreover, using the NSMD platform <I>in vivo</I>, cells recruited on subcutaneously transplanted Ad-SiNWS were also efficiently transfected with exogenous genes loaded into SNPs, validating the <I>in vivo</I> feasibility of this system. We believe that this nanosubstrate-mediated delivery platform will provide a superior system for <I>in vitro</I> and <I>in vivo</I> gene delivery and can be further used for the encapsulation and delivery of other biomolecules.</P>
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Preparation of CueAg coreeshell particles with their anti-oxidation and antibacterial properties
Kuan-ting Chen,Dahtong Ray,Yu-hsien Peng,Yu-Chi Hsu 한국물리학회 2013 Current Applied Physics Vol.13 No.7
CueAg coreeshell particles were fabricated from Cu particles and silver sulphate with the environmental-friendly TA (tartaric acid, C4H6O6) as reducing and chelating agent in an aqueous system. The influences of [TA]/[Ag] and [Ag]/[Cu] molar ratios on the formation of Ag coatings on the Cu particles were investigated. The SEM images and SEMeEDS analyses showed that [TA]/[Ag] = 0.5 and [Ag]/[Cu]≥0.2, the Cu particles were coated with uniform Ag nanoparticles. XRD analyses revealed that for these CueAg particles heated at 250 ℃, the oxidation of Cu was significantly reduced. Both anti-Staphylococcus aureus (Gram-positive) and anti-Escherichia coli (Gram-negative) characteristics of this CueAg composite particles showed satisfactory antibacterial ability. The characteristics of the composite CueAg particles were discussed in detail.
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MUTUAL FUND ADVERTISING AND FUND CONSUMER REDEMPTION BEHAVIOR
Kuan-Ling Lai,Miao-Ling Chen,Chi-Lu Peng 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.7
This study employs a trading dataset from a top investment bank in Taiwan to examine whether and how mutual fund advertising influences fund consumers’ redemption behavior, and whether the effect of advertising differs between small- and large-amount fund consumers. The evidence of this study shows that, on average, fund consumers redeem more non-advertised funds as their returns increase, while fund advertising slows their redemptions. The results from quantile regression show that fund advertising plays an important role in affecting redemption-performance sensitivity of large-amount and medium-amount investors. After taking advertising into account, large-amount and medium-amount investors reduce their fund redemptions. The results suggest that advertising, as a transmission of information, varies with investors’ wealth levels and that these differences in advertising matter to investors’ redemptions. This study contributes to understanding the role of advertising in fund consumers’ realized behavior and is useful for fund companies because they can more efficiently allocate limited resources such as advertising to support the growth of fund assets under management.
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Lin Kuan-Hung,Chen Shi-Peng,Su Yi-Ru,Tsai Yi-Heng,Lin Hsin-Hung 한국원예학회 2024 Horticulture, Environment, and Biotechnology Vol.65 No.1
Waterlogging is one of the major environmental challenges that can adversely impact squash growth, development, and productivity. Nevertheless, studies on the physiological changes of squash to waterlogging stress are scarce. Previously, we reported that the Cucurbita moschata (Cmo) Early Price (Ep) cultivar showed higher chlorophyll content (CC) and spectral refl ectance compared to the Cucurbita maxima (Cma) OK-101 (Ok) cultivar after waterlogging. In the present work, we further examined more physiological parameters in eight cultivars of Cmo and Cma, and studied whether these non-destruc tive indices could effi ciently identify various waterlogging-tolerant genotypes and were consistent with visual evaluations. Moreover, we investigated the eff ects of waterlogging on the antioxidant system of cucurbit species, and evaluated dynamic changes occurring in these plants during varying waterlog periods by determining physiological characteristics. The activ ity of ascorbate peroxidase (APX) and superoxide dismutase (SOD) showed a signifi cant increase in Ep plant leaves and roots after 72 h and 6 h of waterlogging, respectively, compared to Ok plants. In addition, Ep exhibited a higher tolerance to waterlogging than Ok in terms of enhanced root length, values in CC, spectral refl ectance, and APX and SOD activity, plus decreased levels of electrolyte leakage, 2,2-diphenyl-1-picrylhydrazyl free radical scavenging, and hydrogen peroxide levels. This study provides a comprehensive understanding of the physiological variations in response to waterlogging stress and can potentially be used to breed cucurbit species with waterlogging tolerance for a wetter future climate.
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Chun-Wei Wu,Kuan-Hung Lin,Ming-Chih Lee,Yung-Liang Peng,Ting-Yi Chou,Yu-Sen Chang 한국원예학회 2015 원예과학기술지 Vol.33 No.6
The objective of this study was to predict the timing of nitrogen (N) demand through analyzing chlorophyll fluorescence (ChlF), soil-plant analysis development (SPAD), and normalized difference vegetation index (NDVI), which are positively correlated with foliar N concentration in star cluster (Pentas lanceolata). The plants were grown in potting soil under optimal conditions for 30 d, followed by weekly irrigation with five concentrations (0, 4, 8, 16, and 24 mM) of N for an additional 30 d. These five N application levels corresponded to leaf N concentrations of 2.62, 3.48, 4.00, 4.23, and 4.69%, respectively. We measured 13 morphological and physiological parameters, as well as the responses of these parameters to various N-fertilizer treatments. The general increases in Dickson’s quality index (DQI), above-ground dry weight (DW), total DW, flowering rate, △F/Fm’, and qP in response to t reatment with 0 to 8 mM N were similar to those of SPAD, NDVI, and Fv/Fm. Consistent and s trong correlations (R² = 0.60 to 0.85) were observed between leaf N concentration (%) and SPAD, NDVI, △F/Fm’, and above-ground DW. Validation of leaf S PAD, NDVI, and △F/Fm’ revealed that these vegetation indices are accurate predictors of leaf N concentration that can be used for non-destructive estimation of the proper timing for N-solution irrigation of P. lanceolata. Moreover, irrigation with 8 mM N-fertilizer i s recommended w hen leaf N concentration, SPAD, NVDI, and △F/Fm’ ratios are reduced from their saturation values of 4.00, 50.68, 0.64, and 0.137%, respectively.
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Enhanced Performance of Pseudo-Bilayer Organic Photovoltaic Devices via Small Molecule Doping
Syu, Yu-Wei,Huang, Peng-Yi,Li, Husan-De,Hsu, Ching-Ling,Chiu, Kuan-Cheng,Kim, Choongik,Chen, Ming-Chou,Chao, Yu-Chiang American Chemical Society 2014 The Journal of Physical Chemistry Part C Vol.118 No.19
<P>Controlling both the film crystallinity of the active layer for better charge transport and the interdiffusion between donor and acceptor materials for optimal bicontinuous networks is essential in producing pseudo-bilayer polymer solar cells. In this work, we investigated the influence of a doping solution-processable small molecule with high carrier mobility, 5,11-bis(triethylsilylethynyl) anthradithiophene (TES-ADT), on the performance of pseudo-bilayer polymer solar cells made of an underlayer of poly(3-hexylthiophene) (P3HT) and an upper layer of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). By analysis of the X-ray diffraction and UV–vis absorbance spectra of P3HT:TES-ADT blend films it was demonstrated that the film crystallinity was enhanced by TES-ADT doping in the P3HT underlayer. The hole mobility extracted from the current density–voltage curves of hole-only devices based on P3HT:TES-ADT demonstrated an optimized value with proper TES-ADT doping and thermal annealing. An intermixed photoactive layer was observed for the annealed device, indicating the occurrence of interdiffusion with a large interfacial area. With improved film crystallinity and interdiffusion, the optimal device performance was obtained when 5% TES-ADT was blended with P3HT and a thermal annealing treatment at 150 °C for 1 min was conducted. At that optimal condition, the mean crystallite size was increased by 35%, and hence the enhancement of 8% and 14% in power conversion efficiency and short-circuit current density was observed, respectively.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2014/jpccck.2014.118.issue-19/jp502331x/production/images/medium/jp-2014-02331x_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp502331x'>ACS Electronic Supporting Info</A></P>
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