It is well known that blood testosterone level declines during the course of male aging (Feldman et al., 2002; Harman et al., 2001), a phenomena that is associated with the decreases in bone density, muscle mass and strength, sexual function and other physiological parameters (Kaufman & Vermeulen, 2005; Matsumoto, 2002; Vermeulen, 2000). Previous studies reported that serum testosterone concent...

In the past decade, there have been some studies about control methods with the purpose of either reducing “bad” chaos or introducing “good” chaos [Chen & Dong, 1998]. Due to its great potential in nontraditional applications such as those found within the context of physical, chemical, mechanical, electrical, optical, and particularly, biological and medical systems [Chen et al., 2001; Schiff ...

“Epigenetic Tracking” is an evo-devo method to generate arbitrary 2d or 3d shapes; as such, it belongs to the field of “artificial embryology”. The objective of this paper is to explore the implications of the method for some relevant aspects of biology, namely junk DNA, the “ontogeny recapitulates philogeny” theory and the process of ageing. After presenting the latest experiments performed wi...

In my opinion both papers provide important new knowledge. However, I feel that a number of statements require corrections and comments. Wu et al. (2004) discuss the effects of friction on the unconfined compression experiment results. As one of the examples Wu et al. consider the unconfined compression of brain tissues as discussed in Miller and Chinzei (1997). Fig. 7a in Wu et al. (2004) is s...

Although trait leadership theory has been widely criticized by scholars over the past century (Stogdill, 1948; Mann, 1959) employers always want to know what kind of abilities and psychological traits distinguish their future employees. The trait approach plays an important part in human resource management practices for selecting, developing and planning the career paths of managers (Armstrong...

The true thrushes (Turdinae; Sibley and Monroe, 1990) are a speciose lineage of songbirds, with a near-cosmopolitan distribution. Following the systematic placement of true thrushes as a close relative of Old World flycatchers and chats (Muscicapinae) by the DNA–DNA hybridization work of Sibley and Ahlquist (1990), a number of molecular systematic studies have focused on various aspects of true...

The regenerative capacity of the CNS is extremely limited. The reason for this is unclear, but glial cell involvement has been suspected, and oligodendrocytes have been implicated as inhibitors of neuroregeneration (Chen et al., 2000, GrandPre et al., 2000; Fournier et al., 2001). The role of astrocytes in this process was proposed but remains incompletely understood (Silver and Miller, 2004). ...

Over the past decade, model atmospheres and synthetic spectra for late-type stars have improved hand-in-hand with higher quality opacities. In 1994, quality lists of transitions of the water vapor molecule based on ab initio molecular calculations became available (Miller et al. 1994; Schryber, Miller, & Tennyson 1995; Jørgensen, Jensen, & Sørensen 1994) which allowed the computation of the fir...