254 research outputs found
Comparing user and community co-production approaches in local 'welfare' and 'law and order' services : does the governance mode matter?
This paper analyses the relationship between modes of governance at local level and the adoption of user and community co-production approaches in public safety and social care services, based on a German case study. The findings draw on a series of intensive focus groups with managers and staff of public services in four different regions in Germany, exploring existing levels of co-production and its potential in social care and public safety services, with particular focus on older and young people. The paper provides the first clear research evidence on how approaches to co-production are specific to the modes of governance within which they take place. The paper concludes with policy conclusions, both in the two programme areas concerned and in local public services more generally
An Example of Semiclassical Instanton-Like Scattering: (1+1) Dimensional Sigma Model
A solution to the classical field equations in the massless (1+1)-dimensional
O(3) sigma model is found, which describes a multi-particle instanton-like
transition at high energy. In the limit of small number of initial particles,
the number of final particles is shown to be also small, and the probability of
the transition is suppressed by , where is the instanton
action. This solution, however, does not correspond to the maximum transition
probability among all states with given number of incoming particles and
energy. Unless the limit is exponentially sensitive to
the structure of the initial state, our results imply that well above the
sphaleron energy, the instanton-induced cross section becomes again suppressed
by the instanton exponent, and the number of final paricles is again small.Comment: 28 pages, LaTeX preprint TPI-MINN-92/66-
Features of the medical and social characteristics and anxiodepressive disorders in patients with little brain insult in the early recovery period
The aim of the study was to study medical and social and anxiodepressive disorders (ADR) in patients with little brain insult (LBI) in the early recovery period. Materials and Methods. 140 patients were examined, the mean age of which was 57.2±2.2 years. The patients were examined in the early recovery period. Among the 140 patients with LBI, 62% were men and 38% women. The level of anxiety and depression was assessed using the Hamilton psychometric scales (HPMS). Results. In 6% of patients there are relatives who have undergone an acute cerebrovascular acident. 50% of patients live with their families, 27.2% lived with relatives and 22.8% lived alone. Only 25.5% of patients had a daily monitor blood pressure (BP), 17.8% of patients — several times a week and 17.8% of people — several times a month. In addition, 16.4% of patients are forced to measure BP in the health facility, since they do not have a personal tonometer. 26.4% of patients did not measure their BP. 16.4% measure blood pressure once a year. A high level of depression occurred in 3.57% of patients, an average level in 27.86% of patients, mild depression in 33.57% of patients and absence of depressive symptoms in 35% of patients. A high level of anxiety was found in 17.50% of patients with Ml, moderate anxiety level in47.86% of patients, low anxiety level in 45.00%, no anxiety in 1.43% of patients. Conclusion. In patients with LBI in the early recovery period a rather high level of ADR severity was revealed. That causes as early as possible the identification and administration of specific therapy for ADR with LBI.</p
The Vainshtein mechanism in the Decoupling Limit of massive gravity
We investigate static spherically symmetric solutions of nonlinear massive
gravities. We first identify, in an ansatz appropriate to the study of those
solutions, the analog of the decoupling limit (DL) that has been used in the
Goldstone picture description. We show that the system of equations left over
in the DL has regular solutions featuring a Vainshtein-like recovery of
solutions of General Relativity (GR). Hence, the singularities found to arise
integrating the full nonlinear system of equations are not present in the DL,
despite the fact those singularities are usually thought to be due to a
negative energy mode also seen in this limit. Moreover, we show that the
scaling conjectured by Vainshtein at small radius is only a limiting case in an
infinite family of non singular solutions each showing a Vainshtein recovery of
GR solutions below the Vainshtein radius but a different common scaling at
small distances. This new scaling is shown to be associated with a zero mode of
the nonlinearities left over in the DL. We also show that, in the DL, this
scaling allows for a recovery of GR solutions even for potentials where the
original Vainshtein mechanism is not working. Our results imply either that the
DL misses some important features of nonlinear massive gravities or that
important features of the solutions of the full nonlinear theory have been
overlooked. They could also have interesting outcomes for the DGP model and
related proposals.Comment: 52 pages, 7 figures; v3: minor typos corrected, discussion of the
validity of the Decoupling Limit extended; accepted for publication in JHE
Gravity Modification with Yukawa-type Potential: Dark Matter and Mirror Gravity
The nature of the gravitational interaction between ordinary and dark matter
is still open. Any deviation from universality or the Newtonian law also
modifies the standard assumption of collisionless dark matter. On the other
hand, obtaining a Yukawa-like large-distance modification of the gravitational
potential is a nontrivial problem, that has so far eluded a consistent
realization even at linearized level. We propose here a theory providing a
Yukawa-like potential, by coupling non-derivatively the two metric fields
related respectively to the visible and dark matter sectors, in the context of
massive gravity theories where the local Lorentz invariance is broken by the
different coexisting backgrounds. This gives rise to the appropriate mass
pattern in the gravitational sector, producing a healthy theory with the Yukawa
potential. Our results are of a special relevance in the scenario of dark
matter originated from the mirror world, an exact duplicate of the ordinary
particle sector.Comment: 19 page
Einstein Gravity on a Brane in 5D Non-compact Flat Spacetime -DGP model revisited-
We revisit the 5D gravity model by Dvali, Gabadadze, and Porrati (DGP).
Within their framework it was shown that even in 5D non-compact Minkowski space
, the Newtonian gravity can emerge on a brane at short distances by
introducing a brane-localized 4D Einstein-Hilbert term
in the action. Based on this idea,
we construct simple setups in which graviton standing waves can arise, and we
introduce brane-localized derivative terms as a correction to
. We show that the gravity potential
of brane matter becomes at {\it long} distances, because the
brane-localized derivative terms allow only a smooth graviton wave function
near the brane. Since the bulk gravity coupling may be arbitrarily small,
strongly interacting modes from the 5D graviton do not appear. We note that the
brane metric utilized to construct
can be relatively different from the bulk metric by a conformal factor, and
show that the graviton tensor structure that the 4D Einstein gravity predicts
are reproduced in DGP type models.Comment: 1+12 pages, no figure, to appear in JHE
Hamiltonian Cosmological Perturbation Theory
The Hamiltonian approach to cosmological perturbations in general relativity
in finite space-time is developed, where a cosmological scale factor is
identified with spatial averaging the metric determinant logarithm.
This identification preserves the number of variables and leads to a
cosmological perturbation theory with the scalar potential perturbations in
contrast to the kinetic perturbations in the Lifshitz version which are
responsible for the ``primordial power spectrum'' of CMB in the inflationary
model. The Hamiltonian approach enables to explain this ``spectrum'' in terms
of scale-invariant variables and to consider other topical problem of modern
cosmology in the context of quantum cosmological creation of both universes and
particles from the stable Bogoliubov vacuum.Comment: 10 pages, text was changed according to the version accepted for
publication in Physics Letters
Generation of Collisionless Shocks by Laser-Plasma Piston in Magnetised Background: Experiment “BUW”
Theoretical basis and main results of the first successful large-scale, Laser-Plasma experiment “BUW”, on generation of Collisionless Shock Wave in magnetised Background Plasma, are presented. Our classic approach is based on the action of so called Magnetic Laminar Mechanism (or Larmor coupling) for collisionless interaction between interpenetrating super-Alfvenic plasma flows of Laser-Plasma and Background in transverse magnetic field
Ultra-large distance modification of gravity from Lorentz symmetry breaking at the Planck scale
We present an extension of the Randall--Sundrum model in which, due to
spontaneous Lorentz symmetry breaking, graviton mixes with bulk vector fields
and becomes quasilocalized. The masses of KK modes comprising the
four-dimensional graviton are naturally exponentially small. This allows to
push the Lorentz breaking scale to as high as a few tenth of the Planck mass.
The model does not contain ghosts or tachyons and does not exhibit the van
Dam--Veltman--Zakharov discontinuity. The gravitational attraction between
static point masses becomes gradually weaker with increasing of separation and
gets replaced by repulsion (antigravity) at exponentially large distances.Comment: 28 page
Применение тест-системы «Лайн-Блот Сифилис» в диагностикесифилиса методом линейного иммуноблотинга
ZAO ECOlab (Russia) developed Line Blot Syphilis, a new test system on the basis of the linear immunoblotting method
using Treponema рallidum recombinant antigens. The article assessed the diagnostic value of the Line Blot Syphilis test
system in the form of a confirmatory test. As a part of the conducted study, the test system demonstrated its absolute
sensitivity and specificity to serum-positive (n = 237) and serum-negative (n = 114) samples, in which the presence
or absence of Т.pallidum antibodies was confirmed by two treponemal tests. As a result of examining 14 samples
attributed to doubtful analytes based on two test results (passive hemagglutination test and immunofluorescence test
with absorption), the data compliance between the Line Blot Syphilis test system and data from INNO-LIA Syphilis Score
amounted to 100% (14/14) or 93% (13/14) for the immune-enzyme assay and 57% (8/14) for the immunofluorescence
test with absorption. It is recommended to use the Line Blot Syphilis test system (ZAO ECOlab) as a confirmatory syphilis
test.Разработана новая отечественная тест-система «Лайн-Блот Сифилис» (ЗАО «ЭКОлаб») на основе
метода линейного иммуноблотинга с использованием рекомбинантных антигенов Treponema рallidum.
В представленной работе диагностическая значимость диагностикума «Лайн-Блот Cифилис» оценивалась
в формате подтверждающего теста. В рамках проведенного исследования тест-система показала абсолютную
чувствительность и специфичность по отношению к серопозитивным (n = 237) и серонегативным (n = 114)
образцам, в которых наличие или отсутствие антител к Т.pallidum было установлено двумя трепонемными тестами.
При исследовании 14 образцов, отнесенных на основании результатов двух тестов (РПГА и РИФабс) в группу
сомнительных аналитов, соответствие данных, полученных в тест-системе «Лайн-Блот Cифилис», данным
«INNO-LIA Syphilis score» составило 100% (14/14), ИФА - 93% (13/14), РИФабс - 57% (8/14). Рекомендовано
использовать тест-систему «Лайн-Блот Сифилис» (ЗАО «ЭКОлаб») в качестве подтверждающего теста на сифилис
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