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Chia-Wu Lin,Kai-Yu Wang,Shu-Hao Chang,Jin-An Lin 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
Brand communities have been increasingly used by marketers to build brands. A brand community can be defined as a “…group of consumers with a shared enthusiasm for the brand and a well-developed social identity, whose members engage jointly in group actions to accomplish collective goals and/or express mutual sentiments and commitments” (Bagozzi and Dholakia, 2006, p. 45). Recent research on brand communities has begun to identify the importance of consumers’ psychological processes in regard to developing successful brand communities. Based on the flow theory from positive psychology, we propose that flow could be generated by brand community characteristics and plays an important role in influencing brand community members’ attitudes toward the brand. Specifically, we propose a model that identifies brand community characteristics (i.e., community cohesiveness and information quality) that produce flow experience and how the flow experience impacts brand identification and brand loyalty. Members from 31 automobile brand communities participated in this survey study, and 580 validated questionnaires were returned. Structural Equation Model was used to test the research hypotheses. The results show that community cohesiveness and information quality positively directly influence brand identification and also indirectly influence brand identification via flow. Flow also positively influences members’ brand identification and, subsequently, impacts brand loyalty. The results from our research contribute to the branding, brand community, and flow theory literature.
Metal Dusting Behavior of 321 Stainless Steel: Effects of Edge and Corner
Chia-Hao Chang,Wen-Ta Tsai 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.2
The metal dusting behavior of 321 stainless steel (SS) in a flowing mixed CO/H_2/H_2O gas stream at 600 °C for 500 h and 1000 h was investigated. The microstructures and chemical compositions of the reaction products at the surface and those in the substrate under the pits were examined by using a scanning electron microscope (SEM) and a transmission electron microscope (TEM), each combined with an energy dispersive spectrometer (EDS). The phenomenon of a pitting attack that occurred preferentially at the edges and corners of the specimens was the focus of this study. The carburization behavior in the steel substrate under the pits was also characterized. Matrix carbide in the form of Cr_7C_3 and grain oundary carbide in the form of Cr_23C_6 were identified by TEM.
Antenna Selection for MIMO-OFDM Systems in Correlated Channels
Chia-Chang Hu,Hao-Yun Yang 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In the paper, the joint transceiver antenna selection schemes for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems are addressed in the broadband correlated channels. Modified antenna selection methods for frequency-selective fading channel are proposed and analyzed in this paper. Consequently, the use of the proposed modified antenna selection algorithms achieve a substantial saving in system-hardware complexity of the multiple radio frequency (RF) chains associated with multiple antennas without compromising overall system-capacity performance.
OFDM Interpolation-Based Channel Estimation Using Adaptive Pilot-Symbol Arrangement
Chia-Chang Hu,Fu-Hao Chen 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
An adaptive pilot-symbol assignment scheme is proposed for interpolation-based channel estimation in wireless orthogonal frequency division multiplexing (OFDM) communication systems. Computer simulations are conducted to demonstrate both system performance and convergence/tracking superiority and to provide a comparative evaluation of the proposed scheme with other conventional fixed pilot-symbol schemes.
Lee, Chia-Hsing,Wang, Chung-Chi,Lin, Huan-Hsuan,Lee, Sang Soo,Tsang, Daniel C.W.,Jien, Shih-Hao,Ok, Yong Sik Elsevier 2018 The Science of the total environment Vol.619 No.-
<P><B>Abstract</B></P> <P>Climate change gives rise to rapid degradation of rural soils in sloping subtropical and tropical areas and might further threaten environmental sustainability. In this study, we conducted an integrated evaluation of the effects of wood biochar (WB) application mixed with a green waste dreg compost (GWC) on runoff quality, soil losses, and agricultural productivity for a highly weathered tropical soil. A conventional agriculture method, in which soils are treated with anionic polyacrylamide (PAM), was also conducted for comparison. The amounts of runoff and soil loss, and nutrient retention were evaluated a year after WB application. Soil fertility was also investigated through a year pot experiment with rape (<I>Brassica campestris</I> L.) cultivation. Our results showed that the WB application not only effectively increased soil pH, soil organic carbon (SOC) and exchangeable K<SUP>+</SUP> but also increased the production of rape plants. Significant reduction of runoff and the increases of inorganic nitrogen (IN) and total phosphorus (TP) were found in the WB-treated soil. Compared to the control, the co-application of WB and GWC, particularly for the WB at 4%, decreased runoff by 16.8%, soil loss by 25%, and IN loss (via runoff) by 41.8%. Meanwhile, compared to the control and PAM treatments, the co-application of WB and GWC improved soil acidity and the contents of SOC, IN, TP, and exchangeable K<SUP>+</SUP>. The co-application of WB and GWC could be an alternative agricultural strategy to obtain benefits to agricultural productivity and environmental sustainability.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Co-applying biochar and compost notably reduced runoff and soil loss by 16%–25% in a tropical soil. </LI> <LI> In-situ biochar applying increased inorganic N, available P and K by 1.5–2.5 times in slopelands. </LI> <LI> Crop productivity was enhanced by biochar applying 1.5–2 times at least in a tropical slopeland. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Oncogenic Pathway Combinations Predict Clinical Prognosis in Gastric Cancer
Ooi, Chia Huey,Ivanova, Tatiana,Wu, Jeanie,Lee, Minghui,Tan, Iain Beehuat,Tao, Jiong,Ward, Lindsay,Koo, Jun Hao,Gopalakrishnan, Veena,Zhu, Yansong,Cheng, Lai Ling,Lee, Julian,Rha, Sun Young,Chung, Hyu Public Library of Science 2009 PLoS genetics Vol.5 No.10
<▼1><P>Many solid cancers are known to exhibit a high degree of heterogeneity in their deregulation of different oncogenic pathways. We sought to identify major oncogenic pathways in gastric cancer (GC) with significant relationships to patient survival. Using gene expression signatures, we devised an <I>in silico</I> strategy to map patterns of oncogenic pathway activation in 301 primary gastric cancers, the second highest cause of global cancer mortality. We identified three oncogenic pathways (proliferation/stem cell, NF-κB, and Wnt/β-catenin) deregulated in the majority (>70%) of gastric cancers. We functionally validated these pathway predictions in a panel of gastric cancer cell lines. Patient stratification by oncogenic pathway combinations showed reproducible and significant survival differences in multiple cohorts, suggesting that pathway interactions may play an important role in influencing disease behavior. Individual GCs can be successfully taxonomized by oncogenic pathway activity into biologically and clinically relevant subgroups. Predicting pathway activity by expression signatures thus permits the study of multiple cancer-related pathways interacting simultaneously in primary cancers, at a scale not currently achievable by other platforms.</P></▼1><▼2><P><B>Author Summary</B></P><P>Gastric cancer is the second leading cause of global cancer mortality. With current treatments, less than a quarter of patients survive longer than five years after surgery. Individual gastric cancers are highly disparate in their cellular characteristics and responses to standard chemotherapeutic drugs, making gastric cancer a complex disease. Pathway based approaches, rather than single gene studies, may help to unravel this complexity. Here, we make use of a computational approach to identify connections between molecular pathways and cancer profiles. In a large scale study of more than 300 patients, we identified subgroups of gastric cancers distinguishable by their patterns of driving molecular pathways. We show that these identified subgroups are clinically relevant in predicting survival duration and may prove useful in guiding the choice of targeted therapies designed to interfere with these molecular pathways. We also identified specific gastric cancer cell lines mirroring these pathway subgroups, which should facilitate the pre-clinical assessment of responses to targeted therapies in each subgroup.</P></▼2>
Jie-Hao Chen,Chih-Chun Hsieh,Pei-Shing Hua,Chia-Ming Chang,Chi-Ming Lin,Paxon Ti-Yuan Wu,Weite Wu 대한금속·재료학회 2013 METALS AND MATERIALS International Vol.19 No.1
A series of Fe-Cr-C hardfacing alloys is deposited by gas tungsten arc welding and subjected to abrasive wear testing. Pure Fe with various amounts of CrC (Cr:C=4:1) powders are mixed as the fillers and used to deposit hardfacing alloys on low carbon steel. Depending on the various CrC additions to the alloy fillers,the claddings mainly contain hypoeutectic, near eutectic, or hypereutectic microstructures of austenite γ-Fe phase and (Cr,Fe)7C3 carbides on hardfacing alloys, respectively. When 30% CrC is added to the filler, the finest microstructure is achieved, which corresponds to the γ-Fe+(Cr,Fe)7C3 eutectic structure. With the addition of 35% and 40% CrC to the fillers, the results show that the cladding consists of the massive primary (Cr,Fe)7C3 as the reinforcing phase and interdendritic Fe+(Cr,Fe)7C3 eutectics as the matrix. The (Cr,Fe)7C3 carbide-reinforced claddings have high hardness and excellent wear resistance under abrasive wear test conditions. Concerning the abrasive wear feature observable on the worn surface, the formation and fraction of massive primary (Cr,Fe)7C3 carbides predominates the wear resistance of hardfacing alloys. Abrasive particles result in continuous plastic grooves when the cladding has primary γ-Fe phase in a hypoeutectic structure.