Towards Understanding Social Software and Its Impact on Corporate E-Learning Motivation

This research combines recent discussions in the cross-disciplinary areas of e-learning, social software, and training motivation. On the one hand, e-learning with its role in a fast paced knowledge society, its potential to revolutionize education and the gap between research and practitioners is already in discussion for years. Discussions are becoming more intense with the rise of social software. On the other hand, human resources, life-long learning, and motivating employees to participate in trainings appear critical to organizations. This research focuses on e-learning in the corporate context and examines the impact of social software features on user motivation based on a review of training motivation literature and on 39 interviews conducted in an international IT services company. Findings suggest that the impact of social software features is still unknown, and that differentiating them by the learner’s needs leads to further insights

On the Untapped Value of e-HRM: A Literature Review

The “war for talent” is still on. Annually conducted surveys have indicated for years that one third of all organizations are unable to fill vacant job positions with suitable candidates. Responding to these and other challenges, human resource management (HRM) is expected to transform itself. General opinion holds that the HRM transformation has just begun and that the potential of IT in HRM is not yet fully exploited. Examining the value potential of IT in HRM, existing IS research predominately studies the impact of IT on HRM. We contribute by examining the reverse impact in three steps. First, we use Thompson\u27s theory of organizations in action to examine the expected impact of the HRM transformation on IT ( to-be situation). Second, we use Kohli and Grover\u27s IT value typology and review 20 years of the publication history ( as-is situation). Finally, we relate expectations to actual review findings. We find that the HRM transformation should lead to a major shift in technology type used in organizations. However, this shift is not recognized yet, which is why our literature review reveals considerable unaddressed value potential of IT in HRM. We finish the paper by outlining IS research avenues in the context of HRM

Going beyond operational efficiency in HR using IT – A Literature Review of Human Resources Information Systems

Leading academics claim that the management of human resources will be most critical in gaining competitive advantage.Today, the human resources departments (HR) are transforming themselves from an administrative cost-center to an internalpartner delivering additional business value. In this transformation process, information technology (IT) could play a keyrole. Therefore, this paper aims to unfold both the current state of knowledge concerning the value contribution ofinformation systems (IS) for the HR function and approaches that go even beyond operational efficiency. Reviewing nearly8,000 articles, published in the proceedings of eight major IS conferences reveals that in total 35 articles exclusively dealwith the topic of human resources information systems (HRIS) but only very few research approaches show, how HRIScould help to go beyond operational efficiency. Furthermore, the literature analysis identifies that approaches dealing with theIT support for HR planning processes are completely missing so far

Analysis and Design of Crew Sleep Station for ISS

This paper details the analysis and design of the Temporary Sleep Station (TeSS) environmental control system for International Space Station (ISS). The TeSS will provide crewmembers with a private and personal space, to accommodate sleeping, donning and doffing of clothing, personal communication and performance of recreational activities. The need for privacy to accommodate these activities requires adequate ventilation inside the TeSS. This study considers whether temperature, carbon dioxide, and humidity within the TeSS remain within crew comfort and safety levels for various expected operating scenarios. Evaluation of these scenarios required the use and integration of various simulation codes. An approach was adapted for this study, whereby results from a particular code were integrated with other codes when necessary. Computational Fluid Dynamics (CFD) methods were used to evaluate the flow field inside the TeSS, from which local gradients for temperature, velocity, and species concentration such as CO (sub 2) could be determined. A model of the TeSS, containing a human, as well as equipment such as a laptop computer, was developed in FLUENT, a finite-volume code. Other factors, such as detailed analysis of the heat transfer through the structure, radiation, and air circulation from the TeSS to the US Laboratory Aisle, where the TeSS is housed, were considered in the model. A complementary model was developed in G189A, a code which has been used by NASA/JSC for environmental control systems analyses since the Apollo program. Boundary conditions were exchanged between the FLUENT and G189A TeSS models. G189A provides human respiration rates to the FLUENT model, while the FLUENT model provides local convective heat transfer coefficients to G189A model. An additional benefit from using an approach with both a systems simulation and CFD model, is the capability to verify the results of each model by comparison to the results of the other model. The G189A and FLUENT models were used to evaluate various ventilation designs for the TeSS over a range of operating conditions with varying crew metabolic load, equipment operating modes, ventilation flow rates, and with the TeSS doors open and closed. Results from the study were instrumental in the optimization of a design for the TeSS ventilation hardware. A special case was considered where failure of the TeSS ventilation system occurred. In this case, a study was conducted in order to determine the time required for the CO (sub 2) concentration inside the TeSS to increase to ISS limit values under transient conditions. A lumped-capacitance code, SINDA-FLUINT was used in this case to provide accurate predictions of the human reaction to the TeSS cabin conditions including core and skin temperatures and body heat storage. A simple two-dimensional CFD model of a crewmember inside the TeSS was developed in FLUENT in order to determine the volume envelope of the respired air from the human, which maintained a minimum velocity profile. This volume was then used in the SINDA-FLUINT model to facilitate the calculations of CO (sub 2) concentrations, dry bulb temperatures and humidity levels inside the TeSS

Quantization of Hyperbolic N-Sphere Scattering Systems in Three Dimensions

Most discussions of chaotic scattering systems are devoted to two-dimensional systems. It is of considerable interest to extend these studies to the, in general, more realistic case of three dimensions. In this context, it is conceptually important to investigate the quality of semiclassical methods as a function of the dimensionality. As a model system, we choose various three dimensional generalizations of the famous three disk problem which played a central role in the study of chaotic scattering in two dimensions. We present a quantum-mechanical treatment of the hyperbolic scattering of a point particle off a finite number of non-overlapping and non-touching hard spheres in three dimensions. We derive expressions for the scattering matrix S and its determinant. The determinant of S decomposes into two parts, the first one contains the product of the determinants of the individual one-sphere S-matrices and the second one is given by a ratio involving the determinants of a characteristic KKR-type matrix and its conjugate. We justify our approach by showing that all formal manipulations in these derivations are correct and that all the determinants involved which are of infinite dimension exist. Moreover, for all complex wave numbers, we conjecture a direct link between the quantum-mechanical and semiclassical descriptions: The semiclassical limit of the cumulant expansion of the KKR-type matrix is given by the Gutzwiller-Voros zeta function plus diffractional corrections in the curvature expansion. This connection is direct since it is not based on any kind of subtraction scheme involving bounded reference systems. We present numerically computed resonances and compare them with the corresponding data for the similar two-dimensional N-disk systems and with semiclassical calculations.Comment: 35 pages, LaTeX plus 8 Postscript figures, uses epsf.sty, epsfig.sty and epsf.te

Foundations A Good Deal For Society

This study investigates whether setting up a tax-exempt grant-making foundation pays off for society, or whether the process primarily provides tax breaks which ultimately benefit those who set up the foundation, without generating adequate added value for the public at large

Direct Numerical Simulation of turbulent Taylor-Couette flow

The direct numerical simulation (DNS) of the Taylor--Couette flow in the fully turbulent regime is described. The numerical method extends the work by Quadrio & Luchini (Eur. J. Mech. B / Fluids, v.21, pp.413--427, 2002), and is based on a parallel computer code which uses mixed spatial discretization (spectral schemes in the homogeneous directions, and fourth-order, compact explicit finite-difference schemes in the radial direction). A DNS is carried out to simulate for the first time the turbulent Taylor--Couette flow in the turbulent regime. Statistical quantities are computed to complement the existing experimental information, with a view to compare it to planar, pressure-driven turbulent flow at the same value of the Reynolds number. The main source for differences in flow statistics between plane and curved-wall flows is attributed to the presence of large-scale rotating structures generated by curvature effects.Comment: To appear in European Journal of Mechanics B / Fluid

Functional Analysis of the ComK Protein of Bacillus coagulans

The genes for DNA uptake and recombination in Bacilli are commonly regulated by the transcriptional factor ComK. We have identified a ComK homologue in Bacillus coagulans, an industrial relevant organism that is recalcitrant for transformation. Introduction of B. coagulans comK gene under its own promoter region into Bacillus subtilis comK strain results in low transcriptional induction of the late competence gene comGA, but lacking bistable expression. The promoter regions of B. coagulans comK and the comGA genes are recognized in B. subtilis and expression from these promoters is activated by B. subtilis ComK. Purified ComK protein of B. coagulans showed DNA-binding ability in gel retardation assays with B. subtilis- and B. coagulans-derived probes. These experiments suggest that the function of B. coagulans ComK is similar to that of ComK of B. subtilis. When its own comK is overexpressed in B. coagulans the comGA gene expression increases 40-fold, while the expression of another late competence gene, comC is not elevated and no reproducible DNA-uptake could be observed under these conditions. Our results demonstrate that B. coagulans ComK can recognize several B. subtilis comK-responsive elements, and vice versa, but indicate that the activation of the transcription of complete sets of genes coding for a putative DNA uptake apparatus in B. coagulans might differ from that of B. subtilis

„Illustrieren am Beispiel“ beim Beweisverstehen: Beispielkonstruktionsprozesse von Mathematikstudierenden

Beweisverstehen ist für Studierende neben der Beweiskonstruktion eine der wesentlichen Anforderungssituationen im Bereich des Beweisens, etwa beim Nachvollziehen von Beweisen in Vorlesungen, Übungen oder Lehrbüchern. Jedoch zeigen viele Studierende Schwierigkeiten, Beweise zu verstehen(vgl. z.B. Selden, 2012; Weber, 2001). In der fachdidaktischen Forschung wird deshalb das Thema ‚Beweisverstehen‘ intensiv und facettenreich diskutiert (vgl. Sommerhoff & Brunner, 2021). Insbesondere werden unterschiedliche Unterstützungsstrategien für Verstehensprozesse der Studierenden untersucht, darunter das sogenannte ‚Illustrieren am Beispiel‘ (vgl. Mali, 2014; Mills, 2014), also die Illustration einzelner Beweiszeilen durch Beispiele. Dieser Beitrag stellt erste qualitative Erkenntnisse einer Mixed-Methods-Studie zu Möglichkeiten vor, Beweisverstehen durch Illustrieren am Beispiel in den Zusammenhang der bereits in Bauer et al. (2021) beschriebenen quantitativen Ergebnisse zu setzen und diskutiert mögliche Implikationen für das weitere Vorgehen