Big boys don't cry: Depression and men

Men are a numerical minority group receiving a diagnosis of, and treatment for, depression. However, community surveys of men and of their mental health issues (e.g. suicide and alcoholism) have led some to suggest that many more men have depression than are currently seen in healthcare services. This article explores current approaches to men and depression, which draw on theories of sex differences, gender roles and hegemonic masculinity. The sex differences approach has the potential to provide diagnostic tools for (male) depression; gender role theory could be used to redesign health services so that they target individuals who have a masculine, problem-focused coping style; and hegemonic masculinity highlights how gender is enacted through depression and that men’s depression may be visible in abusive, aggressive and violent practices. Depression in men is receiving growing recognition, and recent policy changes in the UK may mean that health services are obliged to incorporate services that meet the needs of men with depression

Reliability modeling of a 1-out-of-2 system: Research with diverse Off-the-shelf SQL database servers

Fault tolerance via design diversity is often the only viable way of achieving sufficient dependability levels when using off-the-shelf components. We have reported previously on studies with bug reports of four open-source and commercial off-the-shelf database servers and later release of two of them. The results were very promising for designers of fault-tolerant solutions that wish to employ diverse servers: very few bugs caused failures in more than one server and none caused failure in more than two. In this paper we offer details of two approaches we have studied to construct reliability growth models for a 1-out-of-2 fault-tolerant server which utilize the bug reports. The models presented are of practical significance to system designers wishing to employ diversity with off-the-shelf components since often the bug reports are the only direct dependability evidence available to them

Book Review

Reviews of the following books: K. S. SHRADER-FRECHETTE, Risk AND RATIONALITY (U. California Press 1991) [312 pp.] Index of Names, Index of Subjects, Notes. CIP 91-3294; ISBN 0-520-07287-1 (Cloth $39.95); ISBN 0-520-07289-8 (Pbk.$15.95). [2120 Berkeley Way, Berkeley, CA 94720.] W. KIP VisCusi, REFORMING PRODUCTS LIABILITY (Harvard U. Press 1991). [270 pp.] Appendices, bibliography, index, notes. CIP 90-23161, ISBN 0-674-75323-2 (Cloth $39.95). [79 Garden Street Cambridge, MA 02138.

A Dark Core in Abell 520

The rich cluster Abell 520 (z=0.201) exhibits truly extreme and puzzling multi-wavelength characteristics. It may best be described as a "cosmic train wreck." It is a major merger showing abundant evidence for ram pressure stripping, with a clear offset in the gas distribution compared to the galaxies (as in the bullet cluster 1E 0657-558). However, the most striking feature is a massive dark core (721 h_70 M_sun/L_sun) in our weak lensing mass reconstruction. The core coincides with the central X-ray emission peak, but is largely devoid of galaxies. An unusually low mass to light ratio region lies 500 kpc to the east, and coincides with a shock feature visible in radio observations of the cluster. Although a displacement between the X-ray gas and the galaxy/dark matter distributions may be expected in a merger, a mass peak without galaxies cannot be easily explained within the current collisionless dark matter paradigm. Interestingly, the integrated gas mass fraction (~0.15), mass-to-light ratio (220 h_70 M_sun/L_sun), and position on the X-ray luminosity-temperature and mass-temperature relations are unremarkable. Thus gross properties and scaling relations are not always useful indicators of the dynamical state of clusters.Comment: 10 pages, 5 figures, accepted for publication in the Astrophysical Journal, higher resolution version at http://visav.phys.uvic.ca/~amahdav

Opportunities and risks of an integrated academic support : [Vortrag ; Tagung] "Integration of Information Services into University Infrastructures" - 7th Frankfurt Symposium: 12.10. - 13.10.2007

In the year 2000 the Deutsche Initiative für Netzwerkinformation (DINI) / German Coalition of Network Information was founded: 10 theses "Changes in information infrastructure – challenges to universities and their information and communications facilities" is the DINI’s founding charter (s. http://www.dini.de). Thesis 4 states: "The universities need to establish information management structures to integrate departments. University managements, departments and central institutions ought to prepare a university development plan for the areas of information, communication and multimedia." ..

Full-Field, Carrier-Less, Polarization-Diversity, Direct Detection Receiver based on Phase Retrieval

We realize dual-polarization full-field recovery using intensity only measurements and phase retrieval techniques based on dispersive elements. 30-Gbaud QPSK waveforms are transmitted over 520-km standard single-mode fiber and equalized from the receiver outputs using 2X2 MIMO

A non-commutative algorithm for multiplying (7 ×\times 7) matrices using 250 multiplications

We present a non-commutative algorithm for multiplying (7x7) matrices using 250 multiplications and a non-commutative algorithm for multiplying (9x9) matrices using 520 multiplications. These algorithms are obtained using the same divide-and-conquer technique