396 research outputs found
Molecular gas and star formation in M81
We present IRAM 30m observations of the central 1.6 kpc of the spiral M81
galaxy. The molecular gas appears weak and with an unusual excitation physics.
We discuss a possible link between low CO emission and weak FUV surface
brightness.Comment: 2 pages, 2 figures, to appear in "Pathways through an eclectic
Universe", J. H. Knapen, T. J. Mahoney, and A. Vazdekis (Eds.), ASP Conf.
Ser., 200
Surviving on Mars: test with LISA simulator
We present the biological results of some experiments performed in the Padua
simulators of planetary environments, named LISA, used to study the limit of
bacterial life on the planet Mars. The survival of Bacillus strains for some
hours in Martian environment is shortly discussed.Comment: To be published on Highlights of Astronomy, Volume 15 XXVIIth IAU
General Assembly, August 2009 Ian F Corbett, ed. 2 pages, 1 figur
Are truncated stellar disks linked to the molecular gas density?
We know that the slope of the radial, stellar light distribution in galaxies
is well described by an exponential decline and this distribution is often
truncated at a break radius (). We don't have a clear understanding for
the origin of these outer truncations and several hypotheses have been proposed
to explain them. We want to test the various theories with direct observations
of the cold molecular gas for a few truncated galaxies in comparison with the
non-truncated ones. The answer to the existence of a possible link between
truncated stellar disks and the molecular gas density cannot be obtained from
CO maps in the literature, because so far there are no galaxies with a clear
truncation observed in CO at high resolution.Comment: 3 pages, 6 figures, to appear in Astrophysics and Space Science
(Apss), special issue of "Science with ALMA: a new era for Astrophysics"
conference, ed. Dr. Bachille
Genetic Basis of Behavioral Security
Behavioral genetics offers numerous opportunities to bridge gaps in biological research of IS and to shed light on the nature versus nurture debate. This study seeks to explain persistent weaknesses in behavioral security from a genetic perspective. A synthesis of current literatures on cognitive neuroscience, decision making, and fraud victimization suggests a genetic basis for user susceptibility to security risks such as phishing scams. Using the classic twin design, this study reports estimated heritability of behavioral security to be at least 29.15% by comparing concordance between 144 pairs of monozygotic (MZ) twins and that between 52 pairs of same-sex dyzygotic (DZ) twins. Zygosity of the twin pairs serves as the primary independent variable in the behavioral genetics analysis, while performance on a behavioral security test serves as the dependent measure. Implications of the study results are discussed with respect to IS research as well as managerial practices
Effect of Presentation Flaws on Users’ Perception of Quality of On-Line Stores’ Web Sites: Is it Perception that Really Counts?
Presentation flaws are abundant in web sites, but there has been no study to determine how presentation flaws affect consumers’ perceptions of quality of an on-line store, trust in the store, and ultimately the intention to purchase. The theoretical foundation stems from various relevant streams of literature: trust and credibility, impression formation, and impression management. A laboratory experiment examined three main factors, incompleteness, error, and poor style, and used 160 student subjects in a completely balanced, fully factorial design (2x2x2). It was found that error, incompleteness, and poor style affected consumers’ perceived quality of the web site. Furthermore, it was found that the relationship between the factors and perceived quality was mediated by the perception of the flaws. The perception of flaws rather than the actual flaws influenced users’ perception of quality
An Empirical Investigation of Antecedents of Internet Abuse in the Workplace
engage in Internet abuse, and whether any of 15 antecedents predict the amount of that abuse. Data were collected from 571 Usenet users in an on-line survey. Aggregating the time for each of the eleven listed methods of Internet abuse revealed a total of 5.8 hours per week, on average. Most of the antecedents in two of the three Theory of Planned Behavior (TPB) categories (Attitudes and Subjective Norms), were significant, and none of the antecedents in the third TPB category (Perceived Behavioral Control) showed significance. addiction, self-justification, job satisfaction, peer culture, and supervisor culture were significant predictors of Internet abuse. Exploratory demographic factors computer experience, gender, and firm revenue also showed predictive power
Role of Commitment and Motivation in Knowledge Management Systems Implementation: Theory, Conceptualization, and Measurement of Antecedents of Success
Our ignorance exceeds our knowledge where issues of motivation and commitment of knowledge workers are concerned in the context of knowledge management systems (KMS) implementation [1,16,17,18]. This study is motivated by the pervasive confusion about the role of knowledge workers \u27 motivation and commitment in KMS implementation and sparse, if any, theoretical or empirical research on these issues. This paper proposes a theoretical framework for understanding how knowledge workers\u27 commitment and motivation affect the use of KMS and resulting organizational performance of the KMS. The theoretical and empirical validation of the framework require first and foremost the theoretical development of the knowledge workers \u27 commitment and motivation constructs and empirical validation of these constructs in the context of a real world organizational study of KMS implementation. The authors attempt to fulfill these specific goals within the scope of this paper. Future empirical research on the integration of motivation and commitment within diverse implementation contexts of KMS and organizational knowledge management programs is expected to further advance the theoretical and empirical development of the proposed framework
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