Universal continuum limit of non-perturbative lattice non-singlet moment evolution

We present evidence for the universality of the continuum limit of the scale dependence of the renormalization constant associated with the operator corresponding to the average momentum of non-singlet parton densities. The evidence is provided by a non-perturbative computation in quenched lattice QCD using the Schr\"odinger Functional scheme. In particular, we show that the continuum limit is independent of the form of the fermion action used, i.e. the Wilson action and the non-perturbatively improved clover action.Comment: Latex2e file, 2 figures, 9 page

Renormalization group invariant average momentum of non-singlet parton densities

We compute, within the Schr\"odinger functional scheme, a renormalization group invariant renormalization constant for the first moment of the non-singlet parton distribution function. The matching of the results of our non-perturbative calculation with the ones from hadronic matrix elements allows us to obtain eventually a renormalization group invariant average momentum of non-singlet parton densities, which can be translated into a preferred scheme at a specific scale.Comment: Latex2e file, 4 figures, 12 page

Small business, big markets, one world

Dit rapport is een introductiepaper van het International Small Business Congress 2002, dat gehouden zal worden in Amsterdam van 27 tot en met 30 oktober 2002. Aangezien de euro op 1 januari 2002 geïntroduceerd wordt, zal speciale aandacht worden besteed aan de economische integratie in Europa en de gevolgen daarvan voor het kleinbedrijf.

Efficient Inter-Task Communication for Nested Loop Programs on a Multiprocessor System

In modern multiprocessor systems, processors can be stalled by inter-task communication when reading from a remote buffer. This paper presents a solution for the inter-task communication, that has a minimal impact on the performance of the system, hides the inter-task communication latency without requiring additional hardware. The solution applies to jobs, represented as task graphs, where the tasks are nested loop programs. Buffers are allocated in scratch-pad memories of the consuming tasks to provide low latency read access. For the nested loop programs, minimal buffer sizes can be determined to cover all possible communication patterns. The added computational complexity is low, as the solution adds only a few operations to the nested loop programs

The multiple sources of autonomy as a start-up motive

Autonomy is a primary motive for a large majority of small business starters. However, as an explanation of why people want their own (autonomous) business it is largely circular. In this paper, we focus on an explanation of the autonomy motive itself. We provide a theoretical and empirical exposition of autonomy as a startup motive. Specifically, it is questioned why small business starters want autonomy. A distinction is made between proximal and distal reasons for wanting autonomy. Our framework is confirmed studying a sample of 167 nascent entrepreneurs motivated by autonomy. The findings suggest that beneath the surface of small business starters striving for autonomy, they differ in their relative emphasis on the underlying sources of the autonomy motive.

Molecular Lines as Diagnostics of High Redshift Objects

Models are presented for CO rotational line emission by high redshift starburst galaxies. The influence of the cosmic microwave background on the thermal balance and the level populations of atomic and molecular species is explicitly included. Predictions are made for the observability of starburst galaxies through line and continuum emission between z=5 and z=30. It is found that the Millimeter Array could detect a starburst galaxy with ~10^5 Orion regions, corresponding to a star formation rate of about 30 Mo yr^{-1}, equally well at z=5 or z=30 due to the increasing cosmic microwave background temperature with redshift. Line emission is a potentially more powerful probe than dust continuum emission of very high redshift objects.Comment: 15 pages LaTex, uses aasms4.sty, Accepted by ApJ

WHAT CONCERNS USERS OF MEDICAL APPS? EXPLORING NON-FUNCTIONAL REQUIREMENTS OF MEDICAL MOBILE APPLICATIONS

The increased use of internet through smartphones and tablets enables the development of new consumer-focused mobile applications (apps) in health care. Concerns including these apps´ safety, usability, privacy, and dependability have been raised. In this paper the authors present the results of a grounded theory-approach to finding what non-functional requirements of medical apps potential users view as most important. A document study and interviews with stakeholders yielded nine non-functional requirements for medical apps: accessibility, certifiability, portability, privacy, safety, security, stability, trustability, and usability. Six of these were evaluated with two groups (differing by age) of potential users through a vignette study. This revealed differences between the age groups regarding the importance each attributed to apps´ usability and certifiability. Furthermore, and contrary to consensus in literature, privacy was considered one of the least important attributes for medical apps by both groups. Trustability, security, and, for the younger group, certifiability, were considered the most important non-functional requirements for medical apps. The implications of these results for developing medical mobile applications are briefly visited