Showing 2007Show all

164 papers · 1 filter

cs.PL2007

TCHR: a framework for tabled CLP

Tom Schrijvers, Bart Demoen, David S. Warren

Tabled Constraint Logic Programming is a powerful execution mechanism for dealing with Constraint Logic Programming without worrying about fixpoint computation. Various application…

q-bio.BM2007★ 12 cited

Modelling background intensity in Affymetrix Genechips

K. M. Kroll, G. T. Barkema, E. Carlon

DNA microarrays are devices that are able, in principle, to detect and quantify the presence of specific nucleic acid sequences in complex biological mixtures. The measurement cons…

astro-ph2007★ 178 cited

Accretion funnels onto weakly magnetized young stars

N. Bessolaz, C. Zanni, J. Ferreira +2

Aims : We re-examine the conditions required to steadily deviate an accretion flow from a circumstellar disc into a magnetospheric funnel flow onto a slow rotating young forming st…

astro-ph2007★ 53 cited

The pulsation modes of the pre-white dwarf PG 1159-035

J. E. S. Costa, S. O. Kepler, D. E. Winget +74

PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…

cond-mat.mtrl-sci2007★ 5 cited

Low-temperature scanning tunneling microscopy of ring-like surface electronic structures around Co islands on InAs(110) surfaces

D. A. Muzychenko, K. Schouteden, S. V. Savinov +3

We report on the experimental observation by scanning tunneling microscopy at low temperature of ring-like features that appear around Co metal clusters deposited on a clean (110)…

math.CA2007★ 60 cited

Non-intersecting squared Bessel paths and multiple orthogonal polynomials for modified Bessel weights

A. B. J. Kuijlaars, A. Martinez-Finkelshtein, F. Wielonsky

We study a model of non-intersecting squared Bessel processes in the confluent case: all paths start at time at the same positive value , remain positive, and ar…

hep-th2007★ 3 cited

Some thoughts about matrix coordinate transformations

J. Adam, B. Janssen, W. Troost +1

Matrix coordinate transformations are defined as substitution operators without requiring an ordering prescription or an inclusion function from the Abelian coordinate transformati…

cond-mat.supr-con2007★ 7 cited

Voltage rectification effects in mesoscopic superconducting triangles: experiment and modelling

N. Schildermans, A. B. Kolton, R. Salenbien +3

The interaction of externally applied currents with persistent currents induced by magnetic field in a mesoscopic triangle is investigated. As a consequence of the superposition of…

astro-ph2007

An infrared view of (candidate accretion) disks around massive young stars

A. Bik, A. Lenorzer, W-. F. Thi +4

Near-infrared surveys of high-mass star-forming regions start to shed light onto their stellar content. A particular class of objects found in these regions, the so-called massive…

astro-ph2007★ 1 cited

Magnetic fields in massive stars

S. Hubrig, M. Schoeller, M. Briquet +9

We review the recent discoveries of magnetic fields in different types of massive stars and briefly discuss strategies for spectropolarimetric observations to be carried out in the…

hep-th2007★ 86 cited

On the Quantum Resolution of Cosmological Singularities using AdS/CFT

Ben Craps, Thomas Hertog, Neil Turok

The AdS/CFT correspondence allows us to map a dynamical cosmology to a dual quantum field theory living on the boundary of spacetime. Specifically, we study a five-dimensional mode…

math.AP2007★ 31 cited

Subelliptic Bourgain-Brezis Estimates on Groups

Sagun Chanillo, Jean Van Schaftingen

We show that divergence free vector fields which belong to L^1 on stratified, nilpotent groups are in the dual space of functions whose sub-gradient are L^Q integrable where Q is t…

math.AG2007

The elementary obstruction and the Weil restriction

Tim Wouters

In this text we investigate the good behaviour of the elementary obstruction, introduced by Colliot-Thelene and Sansuc. This is an obstruction to the existence of a rational points…

math.CA2007★ 1 cited

Orthogonal Laurent polynomials on the unit circle and snake-shaped matrix factorizations

Ruyman Cruz Barroso, Steven Delvaux

Let there be given a probability measure on the unit circle $\TT$ of the complex plane and consider the inner product induced by . In this paper we consider the problem of o…

astro-ph2007★ 10 cited

Resolving the ionized wind of the post-Red Supergiant IRC +10 420 with VLTI/AMBER

W. J. de Wit, R. D. Oudmaijer, M. A. T. Groenewegen +3

The paper investigates the milli-arcsecond scale structure of the present-day mass-loss of the post-Red Supergiant IRC+10420. We use three telescopes of the VLT Interferometer in c…

astro-ph2007★ 1 cited

Folding ion rays in comet C/2004 Q2 (Machholz) and the connection with the solar wind

P. Degroote, D. Bodewits, M. Reyniers

The appearance of folding ion rays in cometary comae is still not very well understood, so our aim is to gain more insight into the role of the local solar wind in the formation of…

astro-ph2007★ 92 cited

A spectroscopic study of southern (candidate) gamma Doradus stars. II. Detailed abundance analysis and fundamental parameters

H. Bruntt, P. De Cat, C. Aerts

The gamma Doradus stars are a recent class of variable main sequence F-type stars located on the red edge of the Cepheid instability strip. They pulsate in gravity modes, and this…

cond-mat.stat-mech2007★ 6 cited

Small-world hypergraphs on a bond-disordered Bethe lattice

D. Bollé, R. Heylen

We study the thermodynamic properties of spin systems with bond-disorder on small-world hypergraphs, obtained by superimposing a one-dimensional Ising chain onto a random Bethe gra…

math.NT2007

Exponential sums: questions by Denef, Sperber, and Igusa

R. Cluckers

We prove the remaining part of the conjecture by Denef and Sperber [Denef, J. and Sperber, S., \textit{Exponential sums mod and {N}ewton polyhedra}, Bull. Belg. Math. Soc., {…

cond-mat.stat-mech2007★ 13 cited

Efficient path sampling on multiple reaction channels

Titus S. van Erp

Due to the time scale problem, rare events are not accessible by straight forward molecular dynamics. The presence of multiple reaction channels complicates the problem even furthe…

math.AG2007★ 1 cited

Poles of the topological zeta function associated to an ideal in dimension two

Lise Van Proeyen, Willem Veys

To an ideal in one can associate a topological zeta function. This is an extension of the topological zeta function associated to one polynomial. But in this case…

cond-mat.str-el2007★ 25 cited

Direct observation of the high magnetic field effect on the Jahn-Teller state in TbVO4

C. Detlefs, F. Duc, Z. A. Kazei +6

We report the first direct observation of the influence of high magnetic fields on the Jahn-Teller (JT) transition in TbVO4. Contrary to spectroscopic and magnetic methods, X-ray d…

math.QA2007★ 14 cited

A study of Galois objects for algebraic quantum groups

K. De Commer

We supplement the study of Galois theory for algebraic quantum groups started in the paper 'Galois Theory for Multiplier Hopf Algebras with Integrals' by A. Van Daele and Y.H. Zhan…

astro-ph2007★ 3 cited

Oscillations in Procyon A: First results from a multi-site campaign

S. Hekker, T. Arentoft, H. Kjeldsen +45

Procyon A is a bright F5IV star in a binary system. Although the distance, mass and angular diameter of this star are all known with high precision, the exact evolutionary state is…