Feasibility of Lignin-Carbohydrate Complexes Based Spherical Bio-carries in Hepatocytes Cultivation

Yi-Min Xie,Hou-Kuan Zhao,Zhe-Zi Ye,Peng Wang,Jin-Ling Li,Shao-Qiong Zeng 한국펄프·종이공학회 2016 한국펄프·종이공학회 학술발표논문집 Vol.2016 No.10

Synthesis and visible-light-induced catalytic activity of Ag₂S-coupled TiO₂ nanoparticles and nanowires

Xie, Yi,Heo, Sung Hwan,Kim, Yong Nam,Yoo, Seung Hwa,Cho, Sung Oh IOP Pub 2010 Nanotechnology Vol.21 No.1

<P>We present the synthesis and visible-light-induced catalytic activity of Ag<SUB>2</SUB>S-coupled TiO<SUB>2</SUB> nanoparticles (NPs) and TiO<SUB>2</SUB> nanowires (NWs). Through a simple wet chemical process from a mixture of peroxo titanic acid (PTA) solution, thiourea and AgAc, a composite of Ag<SUB>2</SUB>S NPs and TiO<SUB>2</SUB> NPs with sizes of less than 7 nm was formed. When the NP composite was further treated with NaOH solution followed by annealing at ambient conditions, a new nanocomposite material comprising Ag<SUB>2</SUB>S NPs on TiO<SUB>2</SUB> NWs was created. Due to the coupling with such a low bandgap material as Ag<SUB>2</SUB>S, the TiO<SUB>2</SUB> nanocomposites could have a visible-light absorption capability much higher than that of pure TiO<SUB>2</SUB>. As a result, the synthesized Ag<SUB>2</SUB>S<I>/</I>TiO<SUB>2</SUB> nanocomposites exhibited much higher catalytic efficiency for the decomposition of methyl orange than commercial TiO<SUB>2</SUB> (Degussa P25, Germany) under visible light. </P>

Sonication-Assisted Synthesis of CdS Quantum-Dot-Sensitized TiO₂ Nanotube Arrays with Enhanced Photoelectrochemical and Photocatalytic Activity

Xie, Yi,Ali, Ghafar,Yoo, Seung Hwa,Cho, Sung Oh American Chemical Society 2010 ACS APPLIED MATERIALS & INTERFACES Vol.2 No.10

<P>A sonication-assisted sequential chemical bath deposition (S-CBD) approach is presented to uniformly decorate CdS quantum dots (QDs) on self-organized TiO<SUB>2</SUB> nanotube arrays (TNTAs). This approach avoids the clogging of CdS QDs at the TiO<SUB>2</SUB> nanotube mouth and promotes the deposition of CdS QDs into the nanotubes as well as on the tube walls. The photoelectrochemical and photocatalytic properties of the resulting CdS-decorated TNTAs were explored in detail. In comparison with a classical S-CBD approach, the sonication-assisted technique showed much enhancement in the photoelectrochemical and photocatalytic activities of the CdS QDs-sensitized TNTAs.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2010/aamick.2010.2.issue-10/am100605a/production/images/medium/am-2010-00605a_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am100605a'>ACS Electronic Supporting Info</A></P>

Rethinking of the Uncertainty: A Fault-Tolerant Target-Tracking Strategy Based on Unreliable Sensing in Wireless Sensor Networks

( Yi Xie ),( Guoming Tang ),( Daifei Wang ),( Weidong Xiao ),( Daquan Tang ),( Jiuyang Tang ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.6

Uncertainty is ubiquitous in target tracking wireless sensor networks due to environmental noise, randomness of target mobility and other factors. Sensing results are always unreliable. This paper considers unreliability as it occurs in wireless sensor networks and its impact on target-tracking accuracy. Firstly, we map intersection pairwise sensors` uncertain boundaries, which divides the monitor area into faces. Each face has a unique signature vector. For each target localization, a sampling vector is built after multiple grouping samplings determine whether the RSS (Received Signal Strength) for a pairwise nodes` is ordinal or flipped. A Fault-Tolerant Target-Tracking (FTTT) strategy is proposed, which transforms the tracking problem into a vector matching process that increases the tracking flexibility and accuracy while reducing the influence of in-the-filed factors. In addition, a heuristic matching algorithm is introduced to reduce the computational complexity. The fault tolerance of FTTT is also discussed. An extension of FTTT is then proposed by quantifying the pairwise uncertainty to further enhance robustness. Results show FTTT is more flexible, more robust and more accurate than parallel approaches.

DO CONSUMERS FEEL BETTER ABOUT THEMSELVES THROUGH PARTICIPATING IN CSR PROGRAMS? THE MODERATING ROLE OF PERCEIVED CORPORATE MOTIVES AND SELF-RELEVANCE

Yi Xie 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.8

There is much evidence in literature supporting the advantageous benefits resulted from corporate social responsibility (CSR) initiatives (Luo and Bhattacharya, 2006). Among others, consumers’ favorable reactions (e.g., enhanced produce evaluation, purchase intention, brand attitude and relationship) (Brown and Dacin 1997; Klein and Dawar 2004) were widely documented. Importantly, consumers tend to use their perceptions on a company’s CSR performance to infer the characteristics of relevant persons (e.g., self and other consumers) due to the meaning-transferring mechanism (Currás-Pérez et al., 2009; Yoon et al., 2006). Although literature suggests that people do good things in order to feel themselves in a positive light, there is a lack of explicit discussion on the impact of consumers’ participation in CSR programs on their perceptions of self. This is an important issue for designing effective CSR programs which can enhance consumer feelings as well. To bridge the academic gap, this research is aimed to address this question. As brands can be viewed as extended self and brand associations can be transferred into self-definition, good associations related with CSR practices will enhance consumers’ self-perceptions and self-esteem once they engage in CSR-related consumptions. However, many company-specific factors (e.g., product quality) and individual specific factors (e.g., CSR support and beliefs) will vary consumers’ responses to CSR efforts (Sen and Bhattacharya 2001). Similarly, CSR’s impact on self-perceptions may be moderated by significant factors. One of the most important determinants underlying differential customer response to CSR is consumers’ attribution of corporate motives. Consumers may attribute a company’s motivation for engaging in CSR simply as self-serving (e.g., high profit) or other-serving (e.g., engagement in social causes) (Becker-Olsen et al. 2006; Yoon et al. 2006), or further differentiate self-serving motives into strategic and egoistic ones and other-serving motives into value-driven and stakeholders-driven ones (Ellen et al., 2006). We examine the effect of self-serving motive vs. other-serving motive on the linkage of CSR and consumers’ self-perceptions and self-esteem in this research. Further we predict that the relevance of a CSR program with an individual consumer (i.e., self-CSR relevance) interacts with specific corporate motives in enhancing the CSR’s effect on consumers’ self-perceptions and self-esteem. A pilot study was first conducted to examine how CSR performance influences consumers’ perceptions (as well as consumers’ believes on their reference group’s perceptions) on a company’s typical customers’ image and then their purchase intention. In this study, we let respondents play judgers’ role and ask them about the relation of CSR and others’ image. A paper-and-pencil survey on university students was conducted. Three hundred and twenty one copies of questionnaires are sent out and collected in total. After deleting the incomplete ones, 302 valid data points constitute the final sample. The number of female and male respondents is comparable (Male: 49%) with average age of 21.4 year-old. We tested the hypothesized relations through structure equation modeling following Anderson and Gerbing’s (1988) two-step approach. The measurement model has good convergent and discrimiant validity. The structural model testing results indicate that CSR has significant positive impact on people’s perceptions on the image of a company’s typical customers (r=.227, P<.001) and on beliefs of reference group’s perceptions on the image of a company’s typical customers (r=.234, P<.001), which subsequently enhance purchase intention (r=.607, P<.001; r=.149, P<.01). As such, the hypothesized relations are supported. Although consumers’ perceptions on others rather than self-perceptions and self-esteem are investigated in this study, findings provide preliminary support on the notion that a company’s CSR behaviors will be used as significant information to evaluate relevant persons (here are typical customers). In the main experiment study, we ask subjects play actors’ role and further examine the connection of CSR and self-perceptions. Results indicate a significant interactive effect between corporate motive and self-relevance. High self-relevance enlarges the difference of self-evaluations after participation in self-entered CSR programs vs. participation in other-centered CSR programs. This study explicitly examines the impact of consumer participation in CSR-related program on consumer self-perceptions and self-esteem. The findings deepen our understanding on the impact of corporate CSR initiatives on consumer responses, particularly the impact on consumer self-perceptions. It provides important implications for management to provide more effective CSR programs with consumers’ welfare considered.

The Effects of Corporate Ability and Corporate Social Responsibility on Winning Customer Support: An Integrative Examination of the Roles of Satisfaction, Trust and Identification

Yi Xie 연세대학교 동서문제연구원 2014 Global economic review Vol.43 No.1

This research proposes an integrative model in which corporate social responsibility (CSR) and corporate ability (CA) influence customer supporting behaviours through three relational factors (i.e. customer satisfaction, trust and identification). A survey was conducted in China. Empirical results indicate that (1) satisfaction, trust and identification are all important routes through which positive perceptions on CSR/CA transfer into enhanced customer support; (2) CSR initiatives gain customer support more effectively through identification, while CA has stronger effect through changing satisfaction and trust; (3) No significant difference in the efficacy of CSR and CA exists across local and global corporations.

Optimal Speed Tracking of Freight Trains Combined with Segmented Soft-Switching Control

Yi Lingzhi,Yi Yu,Wang Yahui,Xie Cheng 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1

Smoothness of travel speed and stopping accuracy are important for freight trains. However, due to the large mass of freight trains, their driving speed is easy to jitter at the operating condition switching point. For these purposes, this paper designs a Dual Mode Optimal Control (DMOC) for tracking the target travel speed of freight trains. This controller contains two sub-controllers, Adaptive Model Predictive Control (AMPC) and Preview control (PC). An Elman Neural Network (ENN) is incorporated in AMPC to adjust the control weights of MPC in real time to output the optimal driving speed. The Afnity propagation-Fast-minimum covariance determinant algorithm, combined in ENN identifes the noisy samples in the training samples and improves the ftting efect of the network. PC and AMPC are fused together by a soft-switching control method. The soft switching control method based on Tanh function can achieve smooth switching of controllers and obtain a good control efect. By comparing with active disturbance rejection control and fuzzy proportional-integral-derivative under two speed profles, DMOC can efectively reduce the speed jitter of speed tracking, improve the stopping accuracy and timeliness of freight trains, and reduce energy consumption.

A Prediction-based Energy-conserving Approximate Storage and Query Processing Schema in Object-Tracking Sensor Networks

( Yi Xie ),( Weidong Xiao ),( Daquan Tang ),( Jiuyang Tang ),( Guoming Tang ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.5

Energy efficiency is one of the most critical issues in the design of wireless sensor networks. In object-tracking sensor networks, the data storage and query processing should be energy-conserving by decreasing the message complexity. In this paper, a Prediction-based Energy-conserving Approximate StoragE schema (P-EASE) is proposed, which can reduce the query error of EASE by changing its approximate area and adopting predicting model without increasing the cost. In addition, focusing on reducing the unnecessary querying messages, P-EASE enables an optimal query algorithm to taking into consideration to query the proper storage node, i.e., the nearer storage node of the centric storage node and local storage node. The theoretical analysis illuminates the correctness and efficiency of the P-EASE. Simulation experiments are conducted under semi-random walk and random waypoint mobility. Compared to EASE, P-EASE performs better at the query error, message complexity, total energy consumption and hotspot energy consumption. Results have shown that P-EASE is more energy-conserving and has higher location precision than EASE.

CONSUMERS’ RESPONSES ON GLOBAL BRANDS’ PRODUCT-HARM CRISES: THE EFFECT OF LAY THEORY

Yi Xie,Xiaoying Zheng 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7

Ag₂S quantum dots-sensitized TiO₂ nanotube array photoelectrodes

Xie, Yi,Yoo, Seung Hwa,Chen, Chong,Cho, Sung Oh Elsevier 2012 Materials science and engineering B. Advanced Func Vol.177 No.1

<P><B>Highlights</B></P><P>► Ag<SUB>2</SUB>S quantum dots (QDs) sensitized TiO<SUB>2</SUB> nanotube arrays (TNTAs) were prepared using a sequential chemical bath deposition approach. ► Sensitization of Ag<SUB>2</SUB>S QDs extended the absorption spectra of TNTAs significantly to the visible light region. ► As a result, Ag<SUB>2</SUB>S QDs-sensitized TNTAs exhibited much higher photocurrent density than pure TNTAs under visible light irradiation.</P> <P><B>Abstract</B></P><P>Ag<SUB>2</SUB>S quantum dots (QDs) were deposited on ordered TiO<SUB>2</SUB> nanotube arrays (TNTAs) using a sequential chemical bath deposition (S-CBD) approach. AgNO<SUB>3</SUB> and thiourea were used as the precursor materials of Ag<SUP>+</SUP> and S<SUP>2−</SUP> ions, respectively. The decoration of Ag<SUB>2</SUB>S QDs significantly shifted the absorption spectrum of the TNTAs to visible light region. As a result, Ag<SUB>2</SUB>S QDs-sensitized TNTAs exhibited much higher photocurrent density than pure TNTAs under visible light irradiation.</P>