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- Insects, Vol. 2, Pages 49-61: Chromosomal Speciation Revisited: Modes of Diversification in Australian Morabine Grasshoppers (Vandiemenella, viatica Species Group)
- Insects, Vol. 2, Pages 36-48: Metabolic Resistance in Bed Bugs
- Entropy, Vol. 13, Pages 683-708: On a Connection between Information and Group Lattices
- Computer games: Super Mario management
- AUTOS: Best Of The Web
- Game Eternity 2 : 18/03/2011
- Game Italian quiz : 18/03/2011
- Game Ghost motel 2 - know your ghosts : 18/03/2011
- Game The illusion of bloody mary : 18/03/2011
- Game Merlins christmas 3 : 18/03/2011
- Game The package : 18/03/2011
- Game Arrogancy angelas song : 18/03/2011
- Game John kerry headquarters : 18/03/2011
- Game Super clicker : 18/03/2011
- Game Minigame arcade : 18/03/2011
- Game Simsi : 18/03/2011
- Game Simon : 18/03/2011
- Game Flash golf 2001 : 18/03/2011
- Game Peace candle 4 : 18/03/2011
- Game Anto shanti : 18/03/2011
Posted: 18 Mar 2011 12:00 AM PDT Chromosomal rearrangements can alter the rate and patterns of gene flow within or between species through a reduction in the fitness of chromosomal hybrids or by reducing recombination rates in rearranged areas of the genome. This concept, together with the observation that many species have structural variation in chromosomes, has led to the theory that the rearrangements may play a direct role in promoting speciation. Australian morabine grasshoppers (genus Vandiemenella, viatica species group) are an excellent model for studying the role of chromosomal rearrangement in speciation because they show extensive chromosomal variation, parapatric distribution patterns, and narrow hybrid zones at their boundaries. This species group stimulated development of one of the classic chromosomal speciation models, the stasipatric speciation model proposed by White in 1968. Our population genetic and phylogeographic analyses revealed extensive non-monophyly of chromosomal races along with historical and on-going gene introgression between them. These findings suggest that geographical isolation leading to the fixation of chromosomal variants in different geographic regions, followed by secondary contact, resulted in the present day parapatric distributions of chromosomal races. The significance of chromosomal rearrangements in the diversification of the viatica species group can be explored by comparing patterns of genetic differentiation between rearranged and co-linear parts of the genome. |
Insects, Vol. 2, Pages 36-48: Metabolic Resistance in Bed Bugs Posted: 18 Mar 2011 12:00 AM PDT Blood-feeding insects have evolved resistance to various insecticides (organochlorines, pyrethroids, carbamates, etc.) through gene mutations and increased metabolism. Bed bugs (Cimex lectularius) are hematophagous ectoparasites that are poised to become one of the major pests in households throughout the United States. Currently, C. lectularius has attained a high global impact status due to its sudden and rampant resurgence. Resistance to pesticides is one factor implicated in this phenomenon. Although much emphasis has been placed on target sensitivity, little to no knowledge is available on the role of key metabolic players (e.g., cytochrome P450s and glutathione S-transferases) towards pesticide resistance in C. lectularius. In this review, we discuss different modes of resistance (target sensitivity, penetration resistance, behavioral resistance, and metabolic resistance) with more emphasis on metabolic resistance. |
Entropy, Vol. 13, Pages 683-708: On a Connection between Information and Group Lattices Posted: 18 Mar 2011 12:00 AM PDT In this paper we review a particular connection between information theory and group theory. We formalize the notions of information elements and information lattices, first proposed by Shannon. Exploiting this formalization, we expose a comprehensive parallelism between information lattices and subgroup lattices. Qualitatively, isomorphisms between information lattices and subgroup lattices are demonstrated. Quantitatively, a decisive approximation relation between the entropy structures of information lattices and the log-index structures of the corresponding subgroup lattices, first discovered by Chan and Yeung, is highlighted. This approximation, addressing both joint and common entropies, extends the work of Chan and Yeung on joint entropy. A consequence of this approximation result is that any continuous law holds in general for the entropies of information elements if and only if the same law holds in general for the log-indices of subgroups. As an application, by constructing subgroup counterexamples, we find surprisingly that common information, unlike joint information, obeys neither the submodularity nor the supermodularity law. We emphasize that the notion of information elements is conceptually significant—formalizing it helps to reveal the deep connection between information theory and group theory. The parallelism established in this paper admits an appealing group-action explanation and provides useful insights into the intrinsic structure among information elements from a group-theoretic perspective. |
Computer games: Super Mario management Posted: 18 Mar 2011 01:16 AM PDT Reality Is Broken: Why Games Make Us Better and How They Can Change the World. By Jane McGonigal. |
Posted: 18 Mar 2011 12:00 AM PDT Your weekly guide to the car-guy parallel universe on the Internet. |
Posted: 02 Dec 2010 09:06 PM PST |
Game Italian quiz : 18/03/2011 Posted: 02 Dec 2010 09:07 PM PST |
Game Ghost motel 2 - know your ghosts : 18/03/2011 Posted: 02 Dec 2010 10:05 PM PST |
Game The illusion of bloody mary : 18/03/2011 Posted: 02 Dec 2010 09:07 PM PST |
Game Merlins christmas 3 : 18/03/2011 Posted: 02 Dec 2010 09:04 PM PST |
Posted: 02 Dec 2010 10:07 PM PST |
Game Arrogancy angelas song : 18/03/2011 Posted: 02 Dec 2010 10:02 PM PST |
Game John kerry headquarters : 18/03/2011 Posted: 02 Dec 2010 11:09 PM PST |
Game Super clicker : 18/03/2011 Posted: 02 Dec 2010 11:01 PM PST |
Game Minigame arcade : 18/03/2011 Posted: 02 Dec 2010 11:05 PM PST |
Posted: 02 Dec 2010 10:08 PM PST |
Posted: 02 Dec 2010 09:02 PM PST |
Game Flash golf 2001 : 18/03/2011 Posted: 02 Dec 2010 11:04 PM PST |
Game Peace candle 4 : 18/03/2011 Posted: 02 Dec 2010 09:00 PM PST |
Posted: 02 Dec 2010 11:07 PM PST |
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