نتایج جستجو برای: hidden population
تعداد نتایج: 758322 فیلتر نتایج به سال:
We develop a dynamic system model for a population of water boilers, which is simple enough for control purposes, but at the same time appreciates the complexity of the boilers internal dynamics and the volatility of such a load. For this purpose, a computationally involved model for a single water boiler is improved and then used to create a population. Based on these boilers a simple Markov C...
BACKGROUND Hidden allergens in foods can induce allergic reactions. Currently it is not possible to estimate the exact prevalence of these reactions but they are clearly a growing problem. OBJECTIVE The purpose of this study was to provide an overview of the role of hidden allergens (their importance, the types of food involved, and the severity of reactions) in allergic reactions in our geog...
We study the behavior of an infinite system of ordinary differential equations modeling the dynamics of a metapopulation, a set of (discrete) populations subject to local catastrophes and connected via migration under a mean field rule; the local population dynamics follow a generalized logistic law. We find a threshold below which all the solutions tend to total extinction of the metapopulatio...
Estimating sizes of hidden or hard-to-reach populations is an important problem in public health. For example, estimates of the sizes of populations at highest risk for HIV and AIDS are needed for designing, evaluating and allocating funding for treatment and prevention programmes. A promising approach to size estimation, relatively new to public health, is the network scale-up method (NSUM), i...
The Minimum Description Length principle (MDL) can be used to train the hidden units of a neural network to extract a representation that is cheap to describe but nonetheless allows the input to be reconstructed accurately. We show how MDL can be used to develop highly redundant population codes. Each hidden unit has a location in a lowdimensional implicit space. If the hidden unit activities f...
Abstract How should we think of the preferences citizens? Whereas self-optimal policy is relatively straightforward to produce, socially optimal often requires a more detailed examination. In this paper, identify an issue that has received far too little attention in welfarist modelling public policy, which name “hidden assumptions” problem. Hidden assumptions can be deceptive because they are ...
Phenylketonuria (PKU) is an inborn error of metabolism, and its detrimental effects on neurocognitive functioning have been well studied. Early detection and treatment of PKU prevent the severe consequences of this disorder. However, even early- and well-treated patients experience hidden disabilities, including subtle deficits in executive functioning, mild reductions in mental processing spee...
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