1,464 research outputs found
Improving Financial Inclusion through the Delivery of Cash Transfer Programmes: The Case of Mexico’s Progresa-Oportunidades-Prospera Programme
This paper follows a quasi-experimental research design to assess the impact of the electronic payment system of Mexico’s Progresa-Oportunidades-Prospera (POP) programme. The switch from cash payments to electronic payments delivered via savings accounts is found to have medium-term effects on savings decisions, transaction costs, and coping strategies. Overall, the study finds that, following the intervention, a substitution effect emerged between saving portfolio choices, with the poor favouring bank accounts over informal saving arrangements.
It also found that the Oportunidades savings account led to an increase in remittance reception, which in turn
had important implications for household consumption smoothing and risk management decisions. The study also
reveals impact heterogeneity depending on household composition and the rural-urban divide, with important
implications for replicability of similar policy innovations in other countrie
PURCHASING AND INVENTORY MANAGEMENT IN SCENCE-BASED INDUSTRIES
Inventory Management has been widely discussed in the
literature. Recently, the so called "Just in Timeâ method
received extensive publicity and was claimed to be one of the
major factors of the Japanese industrial success. This, in turn,
promoted a large campaign in the rest of the industrialized
world, to adopt and imitate the "Just in Timeâ (JIT) policy.
Corporate and plant managers focused attention and set up goals
as to reach as closely as possible the Japanese inventory levels.
Quite often, adoption of JIT disregarded the totally different
nature of the business their companies engaged in, relative to
Japanese industry.
This paper clarifies the differences between two different
industrial models: The "Assembly Linesâ model versus the Hi-Tech
Job Shop "Science Basedâ model and prescribes the inventory
strategy appropriate for each of those models. It is shown that
a fully automated Assembly Line type factory requires a âJust in
Timeâ (minimal holding costs) inventory strategy, while the
Science Based type should follow a more elaborate âoptimal
Penaltyâ type of policy.Information Systems Working Papers Serie
Bohmian Mechanics and Quantum Field Theory
We discuss a recently proposed extension of Bohmian mechanics to quantum
field theory. For more or less any regularized quantum field theory there is a
corresponding theory of particle motion, which in particular ascribes
trajectories to the electrons or whatever sort of particles the quantum field
theory is about. Corresponding to the nonconservation of the particle number
operator in the quantum field theory, the theory describes explicit creation
and annihilation events: the world lines for the particles can begin and end.Comment: 4 pages, uses RevTeX4, 2 figures; v2: shortened and with minor
addition
Trajectories and Particle Creation and Annihilation in Quantum Field Theory
We develop a theory based on Bohmian mechanics in which particle world lines
can begin and end. Such a theory provides a realist description of creation and
annihilation events and thus a further step towards a "beable-based"
formulation of quantum field theory, as opposed to the usual "observable-based"
formulation which is plagued by the conceptual difficulties--like the
measurement problem--of quantum mechanics.Comment: 11 pages LaTeX, no figures; v2: references added and update
Some applications of indirect calorimetry to sports medicine
Some applications of indirect calorimetry to sports medicine are discussed and exemplified by case reports. In particular, it is suggested that oxigen consumption can be employed to assess the effects of physical activity on fat-free tissues and that the respiratory quotient may offer some insights into the food habits of athletes
I tumori del rene
non presente (capitolo di libro
Universal Probability Distribution for the Wave Function of a Quantum System Entangled with Its Environment
A quantum system (with Hilbert space ) entangled with its
environment (with Hilbert space ) is usually not attributed a
wave function but only a reduced density matrix . Nevertheless, there
is a precise way of attributing to it a random wave function , called
its conditional wave function, whose probability distribution depends
on the entangled wave function in
the Hilbert space of system and environment together. It also depends on a
choice of orthonormal basis of but in relevant cases, as we
show, not very much. We prove several universality (or typicality) results
about , e.g., that if the environment is sufficiently large then for
every orthonormal basis of , most entangled states with
given reduced density matrix are such that is close to one of
the so-called GAP (Gaussian adjusted projected) measures, . We
also show that, for most entangled states from a microcanonical subspace
(spanned by the eigenvectors of the Hamiltonian with energies in a narrow
interval ) and most orthonormal bases of ,
is close to with the
normalized projection to the microcanonical subspace. In particular, if the
coupling between the system and the environment is weak, then is close
to with the canonical density matrix on
at inverse temperature . This provides the
mathematical justification of our claim in [J. Statist. Phys. 125:1193 (2006),
http://arxiv.org/abs/quant-ph/0309021] that measures describe the thermal
equilibrium distribution of the wave function.Comment: 27 pages LaTeX, no figures; v2 major revision with simpler proof
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