3,831 research outputs found
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Implementing information systems with stakeholder analysis: A case study
Despite the proliferation of information technology, the implementation of information systems remains problematic. While some organizations have been successful in implementing information systems, many systems fail to live up to expectations and some end up as disasters. This article describes how stakeholder analysis was used in the successful implementation of a decision support system in the Nev/ Zealand army. The system gives legal advice to New Zealand Army commanders about the laws of armed conflict
Social media in qualitative research: Challenges and recommendations
The emergence of social media on the Internet provides an opportunity for information systems researchers to examine new phenomena in new ways. However, for various reasons qualitative researchers in IS have not fully embraced this opportunity. This paper looks at the potential use of social media in qualitative research in information systems. It discusses some of the challenges of using social media and suggests how qualitative IS researchers can design their studies to capitalize on social media data. After discussing an illustrative qualitative study, the paper makes recommendations for the use of social media in qualitative research in IS
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The use of quality function deployment in systems development: A case study
It is now generally recognized that organizations need great flexibility to remain competitive. This paper looks at one company\u27s attempt to mandate flexibility by the use of a technique known as Quality Function Deployment (QFD). QFD is a customer-driven planning and communication process for designing, developing or improving products or services, and is a particular implementation of the Total Quality Management philosophy. The QFD approach is multi-functional-various stakeholders in the design process come together from the project\u27s inception to concurrently plan, design and produce a product or service. In this particular case the company has not only applied the principles of QFD to manufacturing processes; the QFD approach has also been applied to other areas of the business including information systems development. This paper discusses how the application of a QFD approach to information systems development has changed the relationship between the IS department and users, and the process of systems development itself
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The dreams of the cashless society: A study of EFTPOS in New Zealand
This paper looks at the way in which Utopian dreams, such as the cashless society, influence the adoption of information technology. Some authors claim that Utopian visions are used by IT firms to market their services and products, and that the hype that often accompanies technological innovations is part of a large scale social process in contemporary societies. This article discusses the social role of technological utopianism with respect to the introduction of EFTPOS in New Zealand. The case of New Zealand is interesting, given that New Zealand has the highest saturation of EFTPOS terminals in the world
The Halo Occupation Distribution of Obscured Quasars: Revisiting the Unification Model
We model the projected angular two-point correlation function (2PCF) of
obscured and unobscured quasars selected using the Wide-field Infrared Survey
Explorer (WISE), at a median redshift of using a five-parameter Halo
Occupation Distribution (HOD) parameterization, derived from a cosmological
hydrodynamic simulation by Chatterjee et al. The HOD parameterization was
previously used to model the 2PCF of optically selected quasars and X-ray
bright active galactic nuclei (AGN) at . The current work shows that
a single HOD parameterization can be used to model the population of different
kinds of AGN in dark matter halos suggesting the universality of the
relationship between AGN and their host dark matter halos. Our results show
that the median halo mass of central quasar hosts increases from optically
selected () and
infra-red (IR) bright unobscured populations () to obscured quasars (), signifying an increase in the degree of
clustering. The projected satellite fractions also increase from optically
bright to obscured quasars and tend to disfavor a simple `orientation only'
theory of active galactic nuclei unification. Our results also show that future
measurements of the small-scale clustering of obscured quasars can constrain
current theories of galaxy evolution where quasars evolve from an IR- bright
obscured phase to the optically bright unobscured phase.Comment: Accepted 2018 February 9. Received 2018 January 20; in original form
2017 June 2
A pendant proton shuttle on [Fe4N(CO)12]- alters product selectivity in formate vs. H2 production via the hydride [H-Fe4N(CO)12].
Proton relays are known to increase reaction rates for H2 evolution and lower overpotentials in electrocatalytic reactions. In this report we describe two electrocatalysts, [Fe4N(CO)11(PPh3)]- (1-) which has no proton relay, and hydroxyl-containing [Fe4N(CO)11(Ph2P(CH2)2OH)]- (2-). Solid state structures indicate that these phosphine-substituted clusters are direct analogs of [Fe4N(CO)12]- where one CO ligand has been replaced by a phosphine. We show that the proton relay changes the selectivity of reactions: CO2 is reduced selectively to formate by 1- in the absence of a relay, and protons are reduced to H2 under a CO2 atmosphere by 2-. These results implicate a hydride intermediate in the mechanism of the reactions and demonstrate the importance of controlling proton delivery to control product selectivity. Thermochemical measurements performed using infrared spectroelectrochemistry provided pKa and hydricity values for [HFe4N(CO)11(PPh3)]-, which are 23.7, and 45.5 kcal mol-1, respectively. The pKa of the hydroxyl group in 2- was determined to fall between 29 and 41, and this suggests that the proximity of the proton relay to the active catalytic site plays a significant role in the product selectivity observed, since the acidity alone does not account for the observed results. More generally, this work emphasizes the importance of substrate delivery kinetics in determining the selectivity of CO2 reduction reactions that proceed through metal-hydride intermediates
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