Entropy on Spin Factors

Recently it has been demonstrated that the Shannon entropy or the von Neuman entropy are the only entropy functions that generate a local Bregman divergences as long as the state space has rank 3 or higher. In this paper we will study the properties of Bregman divergences for convex bodies of rank 2. The two most important convex bodies of rank 2 can be identified with the bit and the qubit. We demonstrate that if a convex body of rank 2 has a Bregman divergence that satisfies sufficiency then the convex body is spectral and if the Bregman divergence is monotone then the convex body has the shape of a ball. A ball can be represented as the state space of a spin factor, which is the most simple type of Jordan algebra. We also study the existence of recovery maps for Bregman divergences on spin factors. In general the convex bodies of rank 2 appear as faces of state spaces of higher rank. Therefore our results give strong restrictions on which convex bodies could be the state space of a physical system with a well-behaved entropy function.Comment: 30 pages, 6 figure

Star-Forming AGN Host Galaxies

The symbiosis of nuclear activity and star-formation in galaxies, as manifested in their spectral energy distributions (SEDs) is reviewed. Attention is drawn to an Hertzsprung-Russell diagram-equivalent for such objects, as well as to the importance of the SEDs in cosmological context.Comment: Invited review for FIRSED2000 Workshop (Groningen, April 2000

Perception of soundscapes : an interdisciplinary approach

This paper takes an overall view of findings from the Positive Soundscape Project, a large inter-disciplinary soundscapes study. Qualitative fieldwork (soundwalks and focus groups) have found that soundscape perception is influenced by cognitive effects such as the meaning of a soundscape and its components, and how information is conveyed by a soundscape, for example on the behaviour of people within the soundscape. Three significant clusters were found in the language people use to describe soundscapes: sound sources, sound descriptors and soundscape descriptors. Results from listening tests and soundwalks have been integrated to show that the two principal dimensions of soundscape emotional response seem to be calmness and vibrancy. Further, vibrancy seems to have two aspects: organisation of sounds and changes over time. The possible application of the results to soundscape assessment and design are briefly discussed

New trends for metal complexes with anticancer activity

Medicinal inorganic chemistry can exploit the unique properties of metal ions for the design of new drugs. This has, for instance, led to the clinical application of chemotherapeutic agents for cancer treatment, such as cisplatin. The use of cisplatin is, however, severely limited by its toxic side-effects. This has spurred chemists to employ different strategies in the development of new metal-based anticancer agents with different mechanisms of action. Recent trends in the field are discussed in this review. These include the more selective delivery and/or activation of cisplatin-related prodrugs and the discovery of new non-covalent interactions with the classical target, DNA. The use of the metal as scaffold rather than reactive centre and the departure from the cisplatin paradigm of activity towards a more targeted, cancer cell-specific approach, a major trend, are discussed as well. All this, together with the observation that some of the new drugs are organometallic complexes, illustrates that exciting times lie ahead for those interested in ‘metals in medicine

Proinflammatory mediators modulate the heat-activated ion channel TRPV1 via the scaffolding protein AKAP79/150

Peer reviewedPostprin

The Grizzly, November 20, 2003

Can I Kiss You? • Grade Your Professors Today: Website Spotlight • Did Veterans Day Pass you by? • Opinions: Celebrity Couples: Do we Really Care That Much?; GSA Forum Celebrates the Essence of a Liberal Arts Education; Search for the Right Search Engine; Concerning the Residential Village • All American Cafe • Ursinus College Presents: The Love of the Nightingale; Meet the Director • Come Support Jazz and Concert Bands • Men\u27s Basketball Season Looks Promising • Women\u27s Basketball Team Young, yet Optimistichttps://digitalcommons.ursinus.edu/grizzlynews/1549/thumbnail.jp

The Lantern Vol. 72, No. 1, Fall 2004

• Jazz • Bifocal Brainfreeze • A Mug of Tea • Autumn Blend • Montana Skies • Madeleine Parenthesis • Ghosts Come Out at Night • Time • 144 Cromwell Road • Market East • Secret • Stream • What Might Have Been or What Never Was • Buried Mirth • Conversations With a Writer • Churning Through • Chum-Salmon Intentions • Cages • Lola Sang of Green Glass Landscapes • Peg\u27s Antiques • Life at 120 Decibelshttps://digitalcommons.ursinus.edu/lantern/1165/thumbnail.jp

The Grizzly, November 13, 2003

The Power of Puppets: Spiral Q at Ursinus • Registration Frustration • Philly Re-elects John Street as Mayor • First Injectable Male Contraceptive • Campus Connection: Spotlight on NYU and Student Suicide • Rush Begins at Ursinus • Cellphones Used to Cheat: Will This Technology Tempt Students at Ursinus? • Opinions: John Street: A Better Choice for Philadelphia Mayor; Die in Peace or Stay Alive?; Careers over Children; Why You Should Vote • Academy of Sportfighting • Networking for Holidays • Halloween Extravaganzas: Frightful Night for the Senior Class; Smoking Party • Musical Performances in UC History • Myrin Library now Recycles! • Field Hockey\u27s Season Cut Short • Women\u27s Soccer Team has a Record Breaking Season • UC Football: Skid Continueshttps://digitalcommons.ursinus.edu/grizzlynews/1548/thumbnail.jp

PTF10iya: A short-lived, luminous flare from the nuclear region of a star-forming galaxy

We present the discovery and characterisation of PTF10iya, a short-lived (dt ~ 10 d, with an optical decay rate of ~ 0.3 mag per d), luminous (M_g ~ -21 mag) transient source found by the Palomar Transient Factory. The ultraviolet/optical spectral energy distribution is reasonably well fit by a blackbody with T ~ 1-2 x 10^4 K and peak bolometric luminosity L_BB ~ 1-5 x 10^44 erg per s (depending on the details of the extinction correction). A comparable amount of energy is radiated in the X-ray band that appears to result from a distinct physical process. The location of PTF10iya is consistent with the nucleus of a star-forming galaxy (z = 0.22405 +/- 0.00006) to within 350 mas (99.7 per cent confidence radius), or a projected distance of less than 1.2 kpc. At first glance, these properties appear reminiscent of the characteristic "big blue bump" seen in the near-ultraviolet spectra of many active galactic nuclei (AGNs). However, emission-line diagnostics of the host galaxy, along with a historical light curve extending back to 2007, show no evidence for AGN-like activity. We therefore consider whether the tidal disruption of a star by an otherwise quiescent supermassive black hole may account for our observations. Though with limited temporal information, PTF10iya appears broadly consistent with the predictions for the early "super-Eddington" phase of a solar-type star disrupted by a ~ 10^7 M_sun black hole. Regardless of the precise physical origin of the accreting material, the large luminosity and short duration suggest that otherwise quiescent galaxies can transition extremely rapidly to radiate near the Eddington limit; many such outbursts may have been missed by previous surveys lacking sufficient cadence.Comment: 18 pages, 8 figures; revised following referee's comment