I examine the possibility that the Cold Neutral Medium of the interstellar medium in galaxies contains a molecular gas phase that may represent a significant and even the dominant amount of its mass in metal-poor regions. In spiral galaxies such regions are found at large galactocentric distances where diffuse H2 gas will be untraceable through its feeble 12CO J=1–0 emission, the very lack of i...

Although many production scheduling systems are developed, it is difficult to introduce for medium-sized enterprises, because of high cost of initial and maintenance investment. However the functions provided by it, such as available-to-promise under the restrictions of the own process, resource leveling and so on, are required by all of the enterprises to make their profits. The concept of "sp...

This article reviews observations and models of the diffuse ionized gas that permeates the disk and halo of our Galaxy and others. It was inspired by a series of invited talks presented during an afternoon scientific session of the 65th birthday celebration for Professor Carl Heiles held at Arecibo Observatory in August 2004. This review is in recognition of Carl’s long standing interest in and...

In this paper, we analyze price competition in a duopolistic newspaper industry, where politically di¤erentiated newspapers compete in two distinct markets: circulation and advertising. We scrutinize the "theory of circulation spiral". This theory argues that the two-sided structure of the newspaper industry creates positive bidirectional cross-network externalities between readers and advertis...

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Given a surface in 3-space or scattered points from a surface, we present algorithms for fitting the data by a surface which can be generated by a one–parameter subgroup of the group of similarities. These surfaces are general cones and cylinders, surfaces of revolution, helical surfaces and spiral surfaces.

We are investigating possible functional roles for spiral wave activity in visual cortex. Our initial findings suggest that spiral wave formation could contribute to visual salience analysis, in particular for mediating attention to human body features. Exploiting travelling wave dynamics for visual processing offers many advantages, including template-free sensitivity to spatial patterns, robu...

New CO(1→0) and CO(2→1) profiles complemented by data from the literature are used to obtain CO linewidths for 29 barred spiral galaxies with young nuclear starbursts. The ages of the starbursts were estimated from optical spectroscopy and recent evolutionary synthesis models. The CO linewidths and the starburst ages are correlated : galaxies with young (4-6 Myr) starbursts display narrow (<∼ 1...

How does auditory cortex respond to silence? In this issue of Neuron, show that activity in macaque auditory cortex is highly structured even in the absence of sensory stimuli. These data reveal a close link between spontaneous neural activity and the functional organization of auditory cortex.