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41.
Assisted living and similar residential care is an important source of care for elders, including those with dementia. Meaningful activities may help residents maintain function, improve self-esteem, and enhance quality of life. Using data from the 2010 National Survey of Residential Care Facilities, this study identifies the extent of resident engagement in different types of activities; examines the extent to which cognitive status, other resident characteristics, and residential care community characteristics relate to activity engagement; and, among cognitively impaired residents, assesses whether being in dementia-specific settings is associated with activity engagement. Compared with persons without cognitive impairment, those with severe cognitive impairment are less likely to go on outings (79% versus 36%) and talk with family and friends (85% versus 72%). Residents with mild to severe cognitive impairment have higher participation in leisure activities than other residents if they live in dementia-specific settings (73% higher) than those who do not.  相似文献   
42.
A necessary and sufficient condition is established in terms of restrictions on individual preferences for a class of democratic systems to be Nash-stable: that there is no one in the society who can profitably misrepresent his preferences. It is shown that only a very strong similarity of preferences can eliminate the incentive for individuals to misreveal their preferences. Since individual preferences in actual practice are not likely to be so similar, the result in this paper shows that strategic misrevelation of preferences by individuals remains a disturbing possibility under this class of democratic rules.We are grateful to Professor Prasanta K. Pattanaik for many helpful suggestions.  相似文献   
43.
For the multivariate normal mean (vector) estimation problem, some characterizations of the Pitman closest property of a general class of shrinkage (or Stein-rule) estimators (including the so called positive-rule versions) are studied. Further, for the same model when the parameter is restricted to a positively homogeneous cone, Pitman closeness of restricted shrinkage maximum likelihood estimators is established.  相似文献   
44.
If the power spectral density of a continuous time stationary stochastic process is not limited to a finite bandwidth, data sampled from that process at any uniform sampling rate leads to biased and inconsistent spectrum estimators, which are unsuitable for constructing confidence intervals. In this paper, we use the smoothed periodogram estimator to construct asymptotic confidence intervals shrinking to the true spectra, by allowing the sampling rate to go to infinity suitably fast as the sample size goes to infinity. The proposed method requires minimal computation, as it does not involve bootstrap or other resampling. The method is illustrated through a Monte-Carlo simulation study, and its performance is compared with that of the corresponding method based on uniform sampling at a fixed rate.  相似文献   
45.
On the structure of simple preference-based choice functions   总被引:3,自引:0,他引:3  
Consider an agent with fuzzy preferences, who has to make exact choices when faced with different feasible sets of alternatives. Confining our analysis to the case of feasible sets with not more than two alternatives, we axiomatically characterize two broad classes of decision rules (`ratio rules' and `difference rules') for determining exact choices from these two-element feasible sets on the basis of fuzzy preferences. Received: 22 January 1997/Accepted: 2 October 1998  相似文献   
46.
In this article, we consider the problem of unbiased estimation of the distribution function of a two-parameter exponential population using order statistics based on a random sample from the population. We give necessary and sufficient conditions for the existence of an unbiased estimator based on an arbitrary set of order statistics and suggest unbiased estimators in some situations where unbiased estimators exist. A few properties of the suggested estimators for some special cases have also been discussed.  相似文献   
47.
There are many well-known methods applied in classification problem for linear data with both known and unknown distribution. Here, we deal with classification involving data on torus and cylinder. A new method involving a generalized likelihood ratio test is developed for classifying in two populations using directional data. The approach assumes that one of the probabilities of misclassification is known. The procedure is constructed by applying Gibbs sampler on the conditionally specified distribution. A parametric bootstrap approach is also presented. An application to data involving linear and circular measurements on human skull from two tribal populations is given.  相似文献   
48.
We derive the minimum risk estimates of the scalar means for Normal, Exponential, and Gamma distributions, under the convex combination of SEL and LINEX loss functions. The functional forms of the proposed estimates for the three examples are general in nature, and for the boundary conditions provide us with the corresponding estimates under SEL and LINEX loss, respectively. We authenticate our proposed models using different iterative as well as meta-heuristic techniques, and through extensive simulation as well as application of live data sets, validate the efficacy of our proposed results.  相似文献   
49.
Consider the estimation problem for the multiple linear regression (MLR) setup, under the balanced loss function (BLF), where goodness of fit and precision of estimation are modeled using either squared error loss (SEL) or linear exponential (LINEX) loss functions. The authors derive the minimum risk estimates for two different variants of BLF and prove for both the cases the existence of the ubiquitous SEL and LINEX estimates at the boundary conditions. Conclusions draw from the exhaustive simulation runs prove the general nature of proposed theorems.  相似文献   
50.

A simulation-based study is presented to compare the performance of a set of kanban allocation rules in a flexible manufacturing system (FMS) operating in a pull mode. This paper also presents a simulation-based direct search approach to determine the optimal number of kanbans and their simultaneous allocation to different part types. This paper presents a realistic cost function that includes a penalty for failing to meet the demand on time, and a penalty for rescheduling delivery of materials from vendors. The model captures limited flexibility in the form of operational flexibility in a FMS. Future extensions to this study are discussed.  相似文献   
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