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Wolfgang Weitzl,Elisabeth Wolfsteiner,Udo Wagner,Sabine Einwiller 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
The advances of the Internet open consumers new opportunities to share their consumption experiences, opinions and feelings with others. Online customer reviews (OCRs) are a crucial source of information for consumers and are regarded as one of the most influential types of electronic word-of-mouth (eWOM) in shaping consumer attitudes and facilitating purchase decisions (Plummer, 2007). Prior research has produced a number of valuable insights on OCRs (e.g., Dellarocas, Gao, & Narayan, 2010; Hennig-Thurau et al., 2004; Mayzlin, Dover, & Chevalier, 2014). Especially the influence of OCR valence (positively vs. negatively framed information) has received considerable attention both from practitioners and from scholars (e.g., Xue & Zhou, 2010; Yang & Mai, 2010; Lee et al., 2009). However, we argue that scientific insights on the influence of OCR valence remain limited. Specifically, this paper shows that the level of source credibility (high vs. low) as well as the type of product (search vs. experience good) are important moderators of the influence of OCR valence on several consumer OCR reactions (product attitude, product quality, and product trust) under specific circumstances only. Four hundred and sixteen respondents (70% females, average age 24 years) participated in an experiment with a 2×2×2 between-subjects full factorial design manipulating the OCR valence (positive vs. negative), the source credibility (high vs. low) and the product type (search vs. experience good). Results demonstrate that the effect of positive OCRs from highly credible sources on diverse outcome variables is larger than from low credible sources. By acknowledging Chaiken et al.’s (1989) theoretical extension of the heuristic-systematic model (Chaiken, 1980) we provide empirical evidence that source credibility intensifies the impact of positive OCRs due to the additivity effect. In contrast, credible negative information is not more influential than incredible information. A similar mechanism becomes operational when considering product type. Here, positive OCRs about experience goods have a stronger influence on product evaluations than similarly valenced information about search goods. This research provides further support for the crucial role of credible, positive OCRs in affecting consumer behavior in contrast to their negative counterparts. From a practical perspective, marketers should consider including highly credible OCRs from trustworthy and experienced customers’ peers as decision aids. This can be achieved, for instance, by including personal postings from Facebook. Such a strategy is particularly efficient as positive OCRs increase the consumer’s confidence towards the product while credible negative OCRs are not more harmful than incredible ones.
Wagner L. Gonçalves,Guilherme F. Gomes,Yohan D. Mendéz,Fabrício A. Almeida,Valquíria C. Santos,Sebastião S. Cunha Jr. 사단법인 한국계산역학회 2018 Computers and Concrete, An International Journal Vol.22 No.1
Reinforced concrete structures are widely used in civil engineering projects around the world in different designs. Due to the great evolution in computational equipment and numerical methods, structural analysis has become more and more reliable, and in turn more closely approximates reality. Thus among the many numerical methods used to carry out these types of analyses, the finite element method has been highlighted as an optimized tool option, combined with the non-linear and linear analysis techniques of structures. In this paper, the behavior of reinforced concrete beams was analyzed in two different configurations: i) with welding and ii) conventionally lashed stirrups using annealed wire. The structures were subjected to normal and tangential forces up to the limit of their bending resistance capacities to observe the cracking process and growth of the concrete structure. This study was undertaken to evaluate the effectiveness of welded wire fabric as shear reinforcement in concrete prismatic beams under static loading conditions. Experimental analysis was carried out in order compare the maximum load of both configurations, the experimental load-time profile applied in the first configuration was used to reproduce the same loading conditions in the numerical simulations. Thus, comparisons between the numerical and experimental results of the welded frame beam show that the proposed model can estimate the concrete strength and failure behavior accurately.
Thaís Peres Câmara,Letícia Pinho Gomes,Rosaline Rocha Lunardi,Paula Cristina de Souza Souto,Adriana Degrossoli,Wagner Welber Arrais-Silva 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4
The bloodsucking bug Triatoma williami is the main vector of Trypanosoma cruzi, the etiological agent of Chagas disease in State of Mato Grosso, Brazil. It occurs in sylvatic areas of Brazilian savanna with often records of adult specimens in domestic and peridomestic habitats. We describe, for the first time, the reproductive parameters of T. williami females such as fecundity, fertility and lifespan. We also evaluate whether mating and nourishment status of females of T. williami may modulate the reproductive parameters. As a result, the presence of male corroborated to increase female lifespan from 5.14 ± 1,77 to 34.57 ± 10,86 weeks. The oviposition rate in mated female increased 275% when we compared to the fecundity values in unmated females. Finally, our results indicate that mating is crucial to improve lifespan and fecundity of T. williami females. This characteristic may be related to the environmental conditions under T. williami develops, because the sylvatic ecotopes form small scattered colonies with infrequent access to blood sources.
Park, W.J.,Oh, S.J.,Kim, J.K.,Heo, J.,Wagner, T.,Strizik, L. North-Holland 2014 Journal of non-crystalline solids Vol.383 No.-
Efficiency enhancement of a multicrystalline silicon solar cell using down-conversion of Tm<SUP>3+</SUP> and Yb<SUP>3+</SUP> doped silicate glasses was investigated. Na<SUB>2</SUB>O-CaO-SiO<SUB>2</SUB> glasses doped with Tm<SUP>3+</SUP> or Tm<SUP>3+</SUP> and Yb<SUP>3+</SUP> were prepared. Distributed Bragg Reflector (DBR) coatings were sputtered on the glass surface to control the transmission and reflection of the desired portion of the solar spectrum. These were placed on a multicrystalline silicon solar cell in combination with a solar spectrum simulator. The efficiency of solar cell with Tm<SUP>3+</SUP> or Tm<SUP>3+</SUP> and Yb<SUP>3+</SUP> doped glasses increased compared to as-prepared glass without rare-earth addition. The efficiency of solar cell with rare earth doped glasses was re-measured three times with same samples, and the real efficiency enhancement can be proved. The potentials, limitations and future perspectives of rare-earth doped glasses with DBR structure on the efficiencies of PV modules were discussed.