Results 71 to 80 of about 87,795 (287)

White Matter Dysfunction and Neurotransmitter Basis Underlying the Freezing of Gait in Parkinson's Disease

iNew Medicine, EarlyView.
In the freezing of gait in Parkinson's disease, white matter shows decreased local activity but increased functional connectivity. These distinct dysfunctions are uniquely associated with specific neurotransmitter systems (GABA, dopamine, etc.), mapping a new neurochemical basis for this debilitating symptom. ABSTRACT Freezing of gait (FOG) is a severe
Pingping Liu, Jinmei Sun, Lili Hu, Xin Chen, Jinying Han, Liuzhenxiong Yu, Siyu Fan, Rong Ye, Kai Wang, Gong‐Jun Ji, Panpan Hu   +10 more
wiley   +1 more source

Introduction – Les macrophytes, partenaires ou concurrents ? [PDF]

Sciences, Eaux & Territoires, 2014
Si les macrophytes sont souvent envisagés comme des nuisances, ils participent fortement aux fonctionnements écologiques des milieux aquatiques. De fait, il est primordial de les prendre en compte.
DUTARTRE, Alain, PELTRE, Marie-Christine, HAURY, Jacques, HAURY, Jacques   +3 more
doaj  

Disrupted Brain Structure and Function in Alzheimer's Disease Patients With Behavioral and Psychological Symptoms

iNew Medicine, EarlyView.
ABSTRACT Behavioral and psychological symptoms of dementia (BPSD) are highly prevalent in Alzheimer's disease (AD), but the underlying mechanisms are unclear. This study aims to elucidate the neuropathological mechanisms underlying BPSD by investigating gray matter volume (GMV) and brain connectivity in AD patients with and without BPSD.
Xuerui Pang, Linbo Xie, Mengdan Chen, Yi Ji, Yibing Yan, Shanshan Zhou, Panpan Hu, Xingqi Wu, Kai Wang   +8 more
wiley   +1 more source

Instrumental variables estimation of large demand systems with an application to fruit and vegetable demand and price index

Journal of the Agricultural and Applied Economics Association, EarlyView.
Abstract This paper derives the asymptotic properties of an iterated three‐stage least squares (I3SLS) estimator and applies it to estimate a Quadratic Almost Ideal Demand (QUAID) system for 47 fruits and vegetables with endogenous prices. We calculate an exact price index from the estimates and compare it with several commonly used price indexes.
Shaonan Wang, Chen Zhen, Peyton Ferrier
wiley   +1 more source

A Consistent Heteroskedasticity‐Robust LM‐Type Specification Test for Semiparametric Models

Journal of Applied Econometrics, EarlyView.
ABSTRACT This article develops a heteroskedasticity‐robust Lagrange Multiplier‐type specification test for semiparametric regression models. The test is able to detect a wide class of deviations from the null hypothesis. The test statistic is based on the estimates from the restricted semiparametric model, can be computed in a regression‐based way, and
Ivan Korolev
wiley   +1 more source

Nuisances olfactives : de la porcherie à l'épandage

Sciences, Eaux & Territoires, 1999
Depuis quelques années, le problème des nuisances olfactives émises par les élevages porcins sont à la base d'un nombre croissant de conflits entre proche voisinage et éleveurs de porcs.
N. GUINGAND
doaj  

Insignificant or ignored? Antisocial behaviour in private housing in Hong Kong [PDF]

Urbani Izziv, 2012
Because of aggravating antisocial behaviour (ASB) or the neighbourhood problem in housing, many western governments have given ASB control a central place in their policy agendas. However, tackling ASB often involves a great deal of politics.
Yung Yau
doaj  

Caractérisation physicochimique des émissions d'odeurs - Une approche quantifié du problème. Exemple d'une unité de compostage d'ordures ménagères [PDF]

, 1993
The détermination, in tenns of priorities, of actions to be conducted in order to lower the odour nuisances in the vicinity of an industrialisant, requires the establishment of a hierarchy of the différent sources, and to this end, the évaluation of ...
Ramel, Martine
core   +1 more source

Revisiting EWMA in High‐Frequency‐Based Portfolio Optimization: A Comparative Assessment

Journal of Applied Econometrics, EarlyView.
ABSTRACT This paper compares the statistical and economic performance of state‐of‐the‐art high‐frequency (HF) based multivariate volatility models with a simpler, widely used alternative, the Exponentially Weighted Moving Average (EWMA) filter. Using over two decades of 100 U.S.
Laura Capera Romero, Anne Opschoor
wiley   +1 more source

Visual Representations: Defining Properties and Deep Approximations

, 2016
Visual representations are defined in terms of minimal sufficient statistics of visual data, for a class of tasks, that are also invariant to nuisance variability. Minimal sufficiency guarantees that we can store a representation in lieu of raw data with
Chiuso, Alessandro, Soatto, Stefano
core