Regular binary thermal lattice-gases

We analyze the power spectrum of a regular binary thermal lattice gas in two dimensions and derive a Landau-Placzek formula, describing the power spectrum in the low-wavelength, low frequency domain, for both the full mixture and a single component in the binary mixture. The theoretical results are compared with simulations performed on this model and show a perfect agreement. The power spectrums are found to be similar in structure as the ones obtained for the continuous theory, in which the central peak is a complicated superposition of entropy and concentration contributions, due to the coupling of the fluctuations in these quantities. Spectra based on the relative difference between both components have in general additional Brillouin peaks as a consequence of the equipartition failure.Comment: 20 pages including 9 figures in RevTex

International trade negotiations and the trans-border movement of people: A review of the literature

We review the international and New Zealand literatures on the two-way interaction between international migration and agreements designed to enhance cross-border trade or investment. Benefits and costs of migration, to the extent that these may feature in trade and migration negotiations, are discussed. While trade and migration can be substitutes in some contexts, they will be complements in other contexts. Liberalisation of services and the movement of people are likely to offer much more significant gains than liberalisation of remaining barriers to goods trade. Significant scope for liberalisation under GATS mode 4 (the movement of natural persons) may remain. However, temporary migration is already promoted on a unilateral and bilateral basis within immigration policy frameworks that may provide greater flexibility than GATS mode 4. With respect to both trade and migration, the more diverse the exchanging countries are, the greater the economic benefits tend to be. However, greater diversity may also imply greater social costs. This paradox of diversity needs to be addressed through appropriate social policies accompanying enhanced temporary and permanent migration

Two-dimensional perturbations in a scalar model for shear banding

We present an analytical study of a toy model for shear banding, without normal stresses, which uses a piecewise linear approximation to the flow curve (shear stress as a function of shear rate). This model exhibits multiple stationary states, one of which is linearly stable against general two-dimensional perturbations. This is in contrast to analogous results for the Johnson-Segalman model, which includes normal stresses, and which has been reported to be linearly unstable for general two-dimensional perturbations. This strongly suggests that the linear instabilities found in the Johnson-Segalman can be attributed to normal stress effects.Comment: 16 pages, 10 figures, to appear in EPJE, available online first, click DOI or http://www.springerlink.com/content/q1q0187385017628

De dokter vertelt mij wel wat er loos is:een kwalitatief onderzoek naar patronen in het informatiegedrag van zorggebruikers

Item does not contain fulltextVU University Amsterdam, 20 december 2016Promotor : Spooren, W.P.M.S. Co-promotores : Sanders, J.M., Haak, M.J. van den, Meijman, F.J.389 p

(In-)Crease

(In)Crease/(En)Croach// Public/Private Traditionally the distinction between the public and the private was located at and limited to the front door or the facade. Today, a third condition proliferates; electronic space has introduced another public domain, de-localized in the infinite thickness of the screen

Towards a better understanding of foot and ankle kinematics in rheumatoid arthritis : the effects of walking speed and structural impairments

From an early stage of the disease 40% to 60% of the Rheumatoid arthritis (RA) patients suffer from walking impairments such as pain, diminished mobility and problems with daily activities. With the recent development of optical recording technologies and detailed foot and ankle computer models, typical RA foot and ankle kinematic measures have been assessed and reported. However, the relationships between kinematics and walking impairments or pathological changes of foot and ankle structures are not yet fully understood. Such fundamental knowledge may support the development and evaluation of interventions, which aim to improve or restore normal foot and ankle kinematic function. The aim of this thesis was to improve our understanding of the causes of the alterations in foot and ankle kinematics of patients with RA compared to healthy subjects.\ud Gait of 23 RA patients with various stages of disease severity and gait of 14 healthy age-matched subjects was recorded. Their foot and ankle kinematic measures were assessed by means of a foot and ankle model consisting of segments for the leg, hindfoot, midfoot, forefoot and hallux. In the healthy subjects, strong and consistent coupling of motion was observed between hindfoot inversion and hallux dorsi-flexion motion and also between leg rotation and medial-arch collapse. Such strong motion relationships may explain why a local pathology such as joint erosion has a global effect on segment motion elsewhere in the foot. \ud The healthy subjects walked at comfortable and two lower walking speeds, which matched the walking speeds of the RA subjects. However, the factor walking speed alone was not able to explain all observed differences between RA and healthy subjects walking at comfortable speed. The hallux dorsiflexion, midfoot supination and hindfoot inversion motions were influenced by the factor disease, independent of the walking speed. These three segment motions could be related to clinical scores. Local joint erosion and synovitis influenced hallux motion. Hindfoot alignment as well as pathological changes to Achilles and peroneus tendons influenced midfoot and hindfoot motion, respectively. In conclusion, relationships between kinematics and pathological degeneration of foot and ankle structures were found and improve our understanding of RA gait impairments

Driven translocation of a polymer: role of pore friction and crowding

Force-driven translocation of a macromolecule through a nanopore is investigated by taking into account the monomer-pore friction as well as the "crowding" of monomers on the {\it trans} - side of the membrane which counterbalance the driving force acting in the pore. The set of governing differential-algebraic equations for the translocation dynamics is derived and solved numerically. The analysis of this solution shows that the crowding of monomers on the trans side hardly affects the dynamics, but the monomer-pore friction can substantially slow down the translocation process. Moreover, the translocation exponent $\alpha$ in the translocation time - vs. - chain length scaling law, $\tau \propto N^{\alpha}$, becomes smaller when monomer-pore friction coefficient increases. This is most noticeable for relatively strong forces. Our findings may explain the variety of $\alpha$ values which were found in experiments and computer simulations.Comment: 12 page

Gemeenten hebben grote behoefte aan kennis dierenwelzijn : maatschappelijke discussie beperkt zich niet tot intensieve veehouderij

Tachtig procent van het dierenwelzijnsbeleid ligt op het bordje van de gemeente, aldus VVD-wethouder Robert Blom van Alphen aan den Rijn. Terwijl tegelijkertijd bij veel gemeenten kennis hierover ontbreekt. Genoeg reden voor een miniconferentie Gemeentelijk dierenwelzijnsbelei

Fruitteler kiest bewust voor korte keten en verbreding

Al elf jaar runnen Annette en Ton Verbeek hun multifunctionele fruitbedrijf. Smaak en smaakbeleving staan er voorop. De omslag van anonieme bulkproductie naar een regionaal ingebed bedrijf verliep zo succesvol, dat het werk hen boven het hoofd dreigde te groeien. Een brand begin januari bracht naast veel ellende ook bezinning: wat willen ze de komende jaren, waar liggen nieuwe kansen voor het bedrijf? Een vernieuwd strategisch plan is bijna klaa