Assessing A New IT Service Model, Cloud Computing

Recently we have witnessed a new kind of IT advancement. It is a phenomenon where various types of IT capabilities are centralized into data centers to ensure that such resources are available wherever and whenever they are needed. Cloud computing is the latest version of IT service practice that reflects such new trends in IT. Although cloud computing is considered a paradigm shift of IT service design and delivery in IS communities and generates large amounts of interest from business entities, few studies have examined this new IT and business environment. To better understand the organizational application of cloud computing, this study aims both to investigate economic payoffs from cloud computing investment and explore cloud computing adoption within the firm. This study is one of the first of its kinds to assess this new IT service model (i.e., cloud computing) using empirical validation. The proposed study can make contributions to the IS literature by (1) extending the boundary of the IS literature by reflecting the new trend of the IT industry; (2) continuing the debate about business value of IT; and (3) establishing a theoretical framework for cloud computing adoption, which can be applied to further studies on cloud computing

Understanding the Adoption of Convergent Services: The Case of IPTV

Today, many IT innovations that affect our daily lives originate from digital convergence. This study examines the factors influencing consumers’ adoption of Internet protocol TV (IPTV), a representative convergent service combining communication and media technologies. Using innovation diffusion theory, we developed an adoption model reflecting the unique characteristics and usage contexts of IPTV. The results indicate that relative advantage, compatibility, trialability, content diversity, monetary value, personal innovativeness, and social influence have significant direct effects on the consumer’s adoption of IPTV. In addition, the specific attributes of IPTV—namely, interactivity, content diversity, and monetary value—have significant mediating effects on the consumer’s adoption via relative advantage. These results not only provide practical insights into consumer acceptance of new convergent services but also help practitioners plan their marketing strategies more effectively. Available at: https://aisel.aisnet.org/pajais/vol4/iss1/3

Understanding The Impact Of IT Service Innovation On Firm Performance: The Case Of Cloud Computing

Recently we have witnessed a new kind of IT advancement. It is a phenomenon where various types of IT capabilities are centralized into data centers to ensure that such resources are available wherever and whenever they are needed. Cloud computing is the latest version of IT service practice reflecting such new IT trends. Although cloud computing is considered a paradigm shift of IT service design and delivery in IS communities and intrigues large amounts of interest from business entities, few studies have examined this new IT and business phenomenon. To better understand the organizational application of cloud computing, the current study aims to investigate economic payoff from cloud computing investment. Employing the event study methodology, we analyze 183 firm-level announcements regarding cloud computing adoption. The results indicate that cloud computing adoption announcements are associated with positive increases in the market value of the firm. In addition, we identified differences in the effect of cloud computing adoption on market returns according to strategic adoption intention, firm size, and industry sector. These results can be used as useful references for the firm’s decision-making about whether, when, and how to adopt cloud computing to maximize its business value

Understanding the Effect of Message Content and User Identity on Information Diffusion in Online Social Networks

This study attempts to understand information diffusion in online social networks by investigating the factors that affect message dissemination. Particularly, we identify contextual factors from both message and user characteristics on Twitter and examine their impact on diffusion volume and speed. We collected 11,346 tweets, which have been retweeted at least once, regarding the three major mobile carriers in Korea, between September and December 2011. These tweets have generated 59,111 retweets. Our analysis indicates that information diffusion on Twitter in terms of volume and speed is mainly affected by message characteristics such as the inclusion of corporate social responsibility activities. However, the effect of message characteristics on information diffusion is heterogeneous by user type. Our study broadens the knowledge on information diffusion mechanism in online social networks and provides managerial implications on the strategic utilization of online social networks for marketing communications with customers

A Case of Pylephlebitis with Pseudomonas aeruginosa Sepsis and Liver Abscess Secondary to Diverticulitis

Pylephlebitis, or suppurative thrombophlebitis of the portal venous system, is a rare condition occurring secondary to abdominal infections such as diverticulitis. Pylephlebitis can be diagnosed via ultrasonography or CT scan, and is characterized by the presence of a thrombus in the portal vein and bacteremia. However, the diagnosis may be delayed due to the vague nature of the clinical symptoms, causing morbidity and mortality due to pylephlebitis to remain high. Early diagnosis and immediate antibiotic therapy are important for favorable prognosis. Therefore, pylephlebitis should be considered in the differential diagnosis for cases of nonspecific abdominal pain and fever. We report a case of pylephlebitis secondary to diverticulitis, associated with Pseudomonas aeruginosa sepsis. Such cases have not been widely reported. (Korean J Gastroenterol 2016;67:327-331

Electrochemically fabricated NiCu alloy catalysts for hydrogen production in alkaline water electrolysis

NiCu alloy catalysts for alkaline water electrolysis were prepared by an electrodeposition method varying the alloy composition. When the deposition potential became more positive, the bulk and surface Cu content in NiCu alloys as well as the catalyst particle size gradually increased, which were confirmed by various spectroscopic and electrochemical techniques. The surface coverage of the catalysts was found to be a function of the deposition potential, as well. The catalytic activities of the prepared NiCu alloys to hydrogen evolution reaction (HER) were investigated with cyclic voltammetry in a 6.0 M KOH electrolyte at 298 K, and the mass activities of NiCu alloys were correlated with bulk and surface Cu contents to investigate the Cu alloying effect.11Nsciescopu