1,272 research outputs found
Cognitive dysfunction in glioma: Underlying mechanisms and consequences
Heimans, J.J. [Promotor]Stam, C.J. [Promotor]Klein, M. [Copromotor]Reijneveld, J.C. [Copromotor
Notitie voor helpdeskvraag flowchart dierlijke bijproducten
Dierlijke bijproducten zijn producten afkomstig van dieren die onbedoeld vrijkomen bij dierlijke productie of verwerking, maar toch een positieve waarde hebben of in ieder geval een nuttige toepassing kennen. Dit document biedt inzicht in de stromen en het volume van de verschillende soorten dierlijke bijproducten en waar deze, al dan niet via een bewerking, voor gebruikt/toegepast worden (verbranding, biogas, compost, veevoeder, petfood, cosmetica, etc.)
Formation of rings in galactic discs by infalling small companions
We use N-body simulations to study the formation of rings in a disc galaxy by
the impact of a small spherical companion. Both barred and nonbarred target
discs are considered. We discuss the effect of the properties of the target
disc (distribution of mass in the disc, velocity dispersion, etc.) as well as
of the mass and orbit of the companion on the properties of the rings, such as
their amplitude, width, shape, expansion velocity and lifetime. In particular
the amplitude, width, lifetime and expansion velocity of the first ring
increase considerably with companion mass, and so does the expansion velocity
of the particles in it and the total extent of the disc after the interaction.
We also discuss the formation and evolution of spokes and show that they can be
caused by companions of relatively small mass. In our three examples of oblique
impacts on barred target galaxies we note important transient displacements of
the bar, as well as changes of its pattern speed and size. An asymmetric
pseudoring is formed in each case, and during the first stages of its evolution
the bar forms part of it.Comment: 21 pages Latex, 22 figures, of which 7 as separate gif-files.
Requires mn.sty, accepted for publication in MNRAS. High resolution version
at http://www-obs.cnrs-mrs.fr/dynamique/pap/ring.htm
Unravelling the Dodecahedral Spaces
The hyperbolic dodecahedral space of Weber and Seifert has a natural
non-positively curved cubulation obtained by subdividing the dodecahedron into
cubes. We show that the hyperbolic dodecahedral space has a 6-sheeted irregular
cover with the property that the canonical hypersurfaces made up of the
mid-cubes give a very short hierarchy. Moreover, we describe a 60-sheeted cover
in which the associated cubulation is special. We also describe the natural
cubulation and covers of the spherical dodecahedral space (aka Poincar\'e
homology sphere).Comment: 15 pages + 6 pages appendix, 7 figures, 4 table
Uniform begroten met eenduidige normen
Enige tijd geleden zijn de uitgangspunten en normen voor de bedrijfsbegrotingen in de veehouderij opnieuw vastgesteld. Deze normen gelden voor de middellange termijn (5-10 jaar) en worden onder meer gebruikt bij bedrijfsbegrotingen, bij aanvragen voor kredietverlening en bij de Garantstelling Landbouw
On higher congruences between cusp forms and Eisenstein series
In this paper we present several finite families of congruences between cusp
forms and Eisenstein series of higher weights at powers of prime ideals. We
formulate a conjecture which describes properties of the prime ideals and their
relation to the weights. We check the validity of the conjecture on several
numerical examples.Comment: 20 page
Rekenprogramma's voor adviseur en veehouder
Wageningen UR Livestock Research heeft rekenprogrammaâs voor melkvee (Bedrijfs Begrotingsprogramma Rundvee -BBPR), pluimvee (Bedrijfswijzer Pluimvee) en varkens (Bedrijfswijzer Varkens). Deze programmaâs simuleren de bedrijfsvoering van een praktijkbedrijf. Wat je daarmee als adviseur en veehouder kunt, beschrijft dit artike
The early identification of risk factors on the pathway to school dropout in the SIODO study:A sequential mixed-methods study
BACKGROUND: School dropout is a persisting problem with major socioeconomic consequences. Although poor health probably contributes to pathways leading to school dropout and health is likely negatively affected by dropout, these issues are relatively absent on the public health agenda. This emphasises the importance of integrative research aimed at identifying children at risk for school dropout at an early stage, discovering how socioeconomic status and gender affect health-related pathways that lead to dropout and developing a prevention tool that can be used in public health services for youth. METHODS/DESIGN: The SIODO study is a sequential mixed-methods study. A caseâcontrol study will be conducted among 18 to 24 year olds in the south of the Netherlands (n = 580). Data are currently being collected from compulsory education departments at municipalities (dropout data), regional public health services (developmental data from birth onwards) and an additional questionnaire has been sent to participants (e.g. personality data). Advanced analyses, including cluster and factor analyses, will be used to identify children at risk at an early stage. Using the quantitative data, we have planned individual interviews with participants and focus groups with important stakeholders such as parents, teachers and public health professionals. A thematic content analysis will be used to analyse the qualitative data. DISCUSSION: The SIODO study will use a life-course perspective, the ICF-CY model to group the determinants and a mixed-methods design. In this respect, the SIODO study is innovative because it both broadens and deepens the study of health-related determinants of school dropout. It examines how these determinants contribute to socioeconomic and gender differences in health and contributes to the development of a tool that can be used in public health practice to tackle the problem of school dropout at its roots
Mass Models for Spiral Galaxies from 2-D Velocity Maps
We model the mass distributions of 40 high surface brightness spiral galaxies
inside their optical radii, deriving parameters of mass models by matching the
predicted velocities to observed velocity maps. We use constant mass-to-light
disk and bulge models, and we have tried fits with no halo and with three
different halo density profiles. The data require a halo in most, but not all,
cases, while in others the best fit occurs with negligible mass in the luminous
component, which we regard as unphysical. All three adopted halo profiles lead
to fits of about the same quality, and our data therefore do not constrain the
functional form of the halo profile. The halo parameters display large
degeneracies for two of the three adopted halo functions, but the separate
luminous and dark masses are better constrained. However, the fitted disk and
halo masses vary substantially between the adopted halo models, indicating that
even high quality 2-D optical velocity maps do not provide significant
constraints on the dark matter content of a galaxy. We demonstrate that data
from longslit observations are likely to provide still weaker constraints. We
conclude that additional information is needed in order to constrain the
separate disk and halo masses in a galaxy.Comment: 41 pages, 13 figures, accepted for publication in A
CD1d-dependent immune suppression mediated by regulatory B cells through modulations of iNKT cells
Regulatory B cells (Breg) express high levels of CD1d that presents lipid antigens to invariant natural killer T (iNKT) cells. The function of CD1d in Breg biology and iNKT cell activity during inflammation remains unclear. Here we show, using chimeric mice, cell depletion and adoptive cell transfer, that CD1dâlipid presentation by Bregs induces iNKT cells to secrete interferon (IFN)-Îł to contribute, partially, to the downregulation of T helper (Th)1 and Th17-adaptive immune responses and ameliorate experimental arthritis. Mice lacking CD1d-expressing B cells develop exacerbated disease compared to wild-type mice, and fail to respond to treatment with the prototypical iNKT cell agonist α-galactosylceramide. The absence of lipid presentation by B cells alters iNKT cell activation with disruption of metabolism regulation and cytokine responses. Thus, we identify a mechanism by which Bregs restrain excessive inflammation via lipid presentation
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