IT Innovation Capability and Returns on IT Innovation Persistence

Prior studies have shown that the IT innovation capability, a company\u27s ability to innovate systematically with IT, is not easily replicated (persistent), and the persistence tends to be more pronounced during periods when economy-wide IT budgets are declining (hard IT budgets), such the post-Y2K period. Building on resource based view we argue that companies that systematically innovate with IT have a sustained competitive advantage versus their competitors who are adopting an opportunistic approach to IT innovation or choose not to innovate with IT, and the advantage is stronger during periods of hard IT budgets. Both of these arguments were strongly supported when tested on a sample of 1,057 large US firms by indicating increased return on sales, return on assets, and growth

Sustainable value creation: The role of IT innovation persistence

In this research, we investigate the role of alternative IT innovation strategies (systematic, opportunistic, and non-IT innovation) on earnings persistence. Building on agility theory we argue that systematic IT innovation leads to sustainable value creation and ability to recover from negative earnings and recession. Using a sample of large US firms we find that good (bad) performance of systematic IT innovators is more persistent (transitory) than non-systematic IT innovators, and are more likely to recover from recession. We conclude that systematic IT innovators are better prepared to deal with the modern hypercompetitive environment

Conservation Laws in a First Order Dynamical System of Vortices

Gauge invariant conservation laws for the linear and angular momenta are studied in a certain 2+1 dimensional first order dynamical model of vortices in superconductivity. In analogy with fluid vortices it is possible to express the linear and angular momenta as low moments of vorticity. The conservation laws are compared with those obtained in the moduli space approximation for vortex dynamics.Comment: LaTex file, 16 page

Quantum vortices in systems obeying a generalized exclusion principle

The paper deals with a planar particle system obeying a generalized exclusion principle (EP) and governed, in the mean field approximation, by a nonlinear Schroedinger equation. We show that the EP involves a mathematically simple and physically transparent mechanism, which allows the genesis of quantum vortices in the system. We obtain in a closed form the shape of the vortices and investigate its main physical properties. PACS numbers: 03.65.-w, 03.65.Ge, 05.45.YvComment: 7 pages, 4 figure

Segmental resection of the duodenum for gastrointestinal stromal tumor (GIST)

<p>Abstract</p> <p>Background</p> <p>Gastrointestinal stromal tumors (GIST) are the most frequent mesenchymal tumors of the gastrointestinal tract. The biological appearance of these tumors reaches from small lesions with benign appearance to aggressive sarcomas. Only 3–5% of GISTs are localized in the duodenum. There is a controversy, if duodenal GISTs should be treated by a duodenopancreatectomy or by a limited resection of the duodenum.</p> <p>Case presentation</p> <p>A 29-year-old man presented with an acute upper gastrointestinal bleeding from a submucosal tumor located in the proximal part III of the duodenum, 3 cm distal of the papilla of Vater. After an emergency laparotomy with ligation of tumor-feeding vessels in a primary hospital, definitive surgical therapy was performed by partial resection of the duodenum with a duodenojejunostomy. Histology revealed a GIST with a diameter of 2.5 cm and <5 mitoses/50 high power fields, indicating a low risk of malignancy. Therefore no adjuvant therapy with Imatinib was initiated.</p> <p>Conclusion</p> <p>GISTs of the duodenum are a rare cause of upper gastrointestinal bleeding. Partial resection of the duodenum is a warranted alternative to a duodenopancreatectomy, as this procedure has a lower operative morbidity, while providing comparable oncological results.</p

Leads us not into temptation: Knowledge Workers, Business Intelligence Systems, and Occupational Fraud

This paper explores how uncertainty reduction due to increased forecasting accuracy, which is one of main benefits associated with the adoption of Business Intelligence (BI) systems, will affect the behavior of knowledge workers and how this change in their behavior will impact the appropriation of benefits from BI investments. The study uses a micro-economic model in order to show that higher forecasting accuracy is likely to create the conditions for knowledge workers to behave in a morally hazardous fashion. The result of this behavior is that knowledge workers can appropriate for themselves a relatively larger portion of the firm’s rents from BI investments that should accrue to firm and ultimately to external stakeholders. Studies that measure the payoffs from IT investments that enable more accurate forecasts, such as BI, are likely to underestimate the total benefits by the portion that knowledge workers will appropriate for themselves through their opportunistic behavior