Calorimetry for ILC Experiments: CALICE Collaboration R&D

The CALICE Collaboration is carrying out research and development into calorimetry for a detector at the International Linear Collider (ILC). CALICE is investigating a range of technologies for both electromagnetic and hadronic calorimetry. An overview of the prototypes and selected test-beam results are presented.Comment: To appear in the proceedings of the ICHEP08 conferenc

An International Prospectus for Library & Information Professionals: Development, Leadership and Resources for Evolving Patron Needs

The roles of library and information professionals must change and evolve to: 1. accommodate needs of tech-savvy patrons; 2. thrive in the Commons & Library 2.0; 3. provide integrated, just-in-time services; 4. constantly update and enhance technology; 5. design appropriate library spaces for research and productivity; 6.adapt to new models of scholarly communication and publication, especially: the Open Archives Initiative and digital repositories; 7. remain abreast of national and interanational academic and legislative initiatives affecting the provision of information services and resources. Professionals will need to collaborate in: 1. Formal & informal networks – regional, national, and international; and; 2. Library staff development initiatives – regional, national, international Professionals will need to use libraries as laboratories for ongoing, lifelong training and education of patrons and of all library staff ( internal patrons ): the library is the framework in which Information Research Literacy is the curriculum . Professionals will need to remain aware of trends and challenges in their regions, the EU, the US and North America, of models which might provide inspiration and support: 1. Top Technology Trends; 2. New paradigms of professionalism; 3. Knowledge-creation and knowledge consumption; 4. The shifting balance of the physical library with the virtual-digital librar

Boundedness of Maximal Operators of Schr\"odinger Type with Complex Time

Results of P. Sj\"olin and F. Soria on the Schr\"odinger maximal operator with complex-valued time are improved by determining up to the endpoint the sharp $s \geq 0$ for which boundedness from the Sobolev space $H^s(\mathbb{R})$ into $L^2(\mathbb{R})$ occurs. Bounds are established for not only the Schr\"odinger maximal operator, but further for a general class of maximal operators corresponding to solution operators for certain dispersive PDEs. As a consequence of additional bounds on these maximal operators from $H^s(\mathbb{R})$ into $L^2([-1, 1])$, sharp results on the pointwise almost everywhere convergence of the solutions of these PDEs to their initial data are determined.Comment: 12 pages. One further minor correction. To appear in the Revista Matem\'atica Iberoamerican

Transforming Library Service Through Information Commons: Part 1 - Introduction

An introduction to the concept of the Information Commons in libraries

Vector computer memory bank contention

A number of vector supercomputers feature very large memories. Unfortunately the large capacity memory chips that are used in these computers are much slower than the fast central processing unit (CPU) circuitry. As a result, memory bank reservation times (in CPU ticks) are much longer than on previous generations of computers. A consequence of these long reservation times is that memory bank contention is sharply increased, resulting in significantly lowered performance rates. The phenomenon of memory bank contention in vector computers is analyzed using both a Markov chain model and a Monte Carlo simulation program. The results of this analysis indicate that future generations of supercomputers must either employ much faster memory chips or else feature very large numbers of independent memory banks

Combining motility and bioluminescent signalling aids mate finding in deep-sea fish: a simulation study

We present a model to estimate the mean time required for mate finding among deep-sea fish as a function of motility and the extent of bioluminescent signalling. This model differs from those of previous works in 3 important ways by including (1) sex differences in motility, (2) a maximum detection range of bioluminescent signals derived from a recently published mechanistic model based on physical principles and the physiology of vision, and (3) a novel consideration of the likelihood of individuals passing within detection range only in the interval between flashes and hence, failing to detect the signaller. We argue that the flash rates required for effective detection are low, with rates of less than 1 per minute being entirely plausible, and that predation pressure may further encourage low flash rates. Further, even at high flash frequencies, the energetic cost of bioluminescent signalling is argued to be a trivial fraction of resting metabolic rates. Using empirically derived estimates for parameter values, we estimate that a female will be detected and reached by a male within 2 to 4 h of beginning to signal. Hence, we argue that mate finding may not seriously restrict reproductive success in species that can exploit this signalling system. We further argue that where male motility allows bioluminescent signalling, this may have some advantages over chemical-based signalling. Bioluminescent signalling may, therefore, be more important to mate finding in the deep sea (relative to chemical signals) than some previous works have suggested

Bibliography: The Information Commons and Beyond

A bibliography of resources about the Information Commons model in libraries

Information Commons Issues and Trends: Voices From the Frontline

Attendees at this ACRL panel were invited to increase their understanding of Information Commons (IC) concepts, models, planning, implementation and assessment. The event was a discussion panel with IC leaders regarding models that their libraries were developing, evolutionary processes their ICs have undergone, challenges and successes in the past years, and what the future holds