Aging, encoding specificity, and memory change in the Double Memory Test

Aged and young adults were tested by category cued recall after learning with category cues (CCR) or with item cues (ICR). CCR was about twice ICR for both aged and young adults. The aged recalled less than the young and did not benefit as much from greater encoding specificity and deeper processing in CCR. ICR and CCR were correlated, so that expected CCR can be predicted from ICR. The regression of CCR on ICR was linear for young adults, but was piecewise linear for the aged, showing that the relationship between ICR and CCR was not uniform for the aged adults. Lower than expected CCR by a subset of aged without clinical dementia may be a sign of preclinical dementia.     

Aging and task switching: A meta-analysis.

A meta-analysis of 26 published articles (with 36 independent participant groups) was conducted to analyze the relationship between task-switching effects and aging. Latency served as the dependent measure. Multilevel modeling was used to test for additive and multiplicative complexity effects in local and global switch costs. Global task switching was found to add 1 or more stages to processing and resulted in a marked age deficit. Local task-switching costs, on the other hand, showed a multiplicative complexity effect but no specific attention-related age deficits. Cueing or switch predictability did not affect age differences. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Nighttime waking in children with asthma: An exploratory study of daily fluctuations in family climate.

Children with asthma are at increased risk for waking in the night, and there is the potential for the entire household to feel the effects. The authors conducted a telephone-based diary study to examine whether daily fluctuations in parent mood, parenting hassles, and family routines would distinguish nights in which waking occurred from nights in which they did not. Forty-seven families with a child with asthma were contacted 4 times a week every 3 months over a period of 1 year, resulting in 500 daily observations. Parent negative mood, perceived parenting hassles, and disruptions in bedtime routines were associated with increased odds that the child would wake in the middle of the night. Results underscore the importance of considering family climate in children's disturbed sleep. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of age on contextually mediated associations in paired associate learning.

Older and young adults learned single-function lists of paired associates with no contextual overlap (e.g., J-K, L-M) and double-function lists of paired associates consisting of chains of pairs (e.g., A-B, B-C). Although young adults outperformed older adults on both pair types, there was a robust Pair Type × Age interaction. Evidence from intrusion analyses shows that older adults performed better than would be expected on the contextually overlapping double-function pairs because they were less subject to response competition for the double-function pairs. Young adults made a larger proportion of backward and remote intrusions to double-function probes than did older adults. Thus, group differences in both correct-recall probabilities and intrusion analysis suggest that backward and transitive associations are sensitive to aging. The results are discussed within the theoretical framework of the temporal context model and the hypothesis that older adults are impaired at forming new item-context associations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

EuQoS: End-to-End Quality of Service over Heterogeneous Networks

The EuQoS (End-to-End QoS over Heterogeneous Networks) IST Integrated European Project aimed to define a Next Generation Network architecture that builds, uses and manages end-to-end QoS across different administrative domains and heterogeneous networks (UMTS, xDSL, Ethernet, WiFi, Satellite and IP/MPLS). The EuQoS architecture preserves the openness and the decentralized decision model of the actual Internet, runs on off-the-shelf hardware and network equipment, and allows end users to request various services without changing the Application Signaling protocol, while meeting regulators’ and users’ Net Neutrality requirements. This paper presents the key elements of the EuQoS architecture and describes the main results obtained in field trials performed on a fully-functional EuQoS system prototype developed over a pan-European testbed. Furthermore, the paper discusses the main strengths of the system and the issues related to its actually deployment on a large scale, from both technical and market points of view.     

美国太阳能建筑编年史

美国的能源价格比欧洲低．立法比欧洲更为宽松，而且自由市场经济给快速分期偿还资产投资施加了很大的压力．这就意味着在美国推行节能建筑不如欧洲大陆紧迫。可是现在有一种变化正在慢慢显现出来，这就是能源讨论所制定的节能目标在美国的建筑院校中占据着越来越重要的位置。此外．随着新项目的推广以及能源成本的提高．美国的政治态度也发生了变化——至少城市中心的情况如此。     

Constraints on general slowing: a meta-analysis using hierarchical linear models with random coefficients

General slowing (GS) theories are often tested by meta-analysis that model mean latencies of older adults as a function of mean latencies of younger adults. Ordinary least squares (OLS) regression is inappropriate for this purpose because it fails to account for the nested structure of multitask response time (RT) data. Hierarchical linear models (HLM) are an alternative method for analyzing such data. OLS analysis of data from 21 studies that used iterative cognitive tasks supported GS; however, HLM analysis demonstrated significant variance in slowing across experimental tasks and a process-specific effect by showing less slowing for memory scanning than for visual-search and mental-rotation tasks. The authors conclude that HLM is more suitable than OLS methods for meta-analyses of RT data and for testing GS theories.     

Respiratory effort sensation during exercise with induced expiratory-flow limitation in healthy humans

Nine healthy subjects (age 31 +/- 4 yr) exercised with and without expiratory-flow limitation (maximal flow approximately 1 l/s). We monitored flow, end-tidal PCO2, esophageal (Pes) and gastric pressures, changes in end-expiratory lung volume, and perception (sensation) of difficulty in breathing. Subjects cycled at increasing intensity (+25 W/30 s) until symptom limitation. During the flow-limited run, exercise performance was limited in all subjects by maximum sensation. Sensation was equally determined by inspiratory and expiratory pressure changes. In both runs, 90% of the variance in sensation could be explained by the Pes swings (difference between peak inspiratory and peak expiratory Pes). End-tidal PCO2 did not explain any variance in sensation in the control run and added only 3% to the explained variance in the flow-limited run. We conclude that in healthy subjects, during normal as well as expiratory flow-limited exercise, the pleural pressure generation of the expiratory muscles is equally related to the perception of difficulty in breathing as that of the inspiratory muscles.     

Correlated and Coupled Cognitive Change in Older Adults With and Without Preclinical Dementia.

Common factor aging theories state that correlations among cognitive age effects signify a single underlying causal process. The logic underlying this proposition was evaluated by examining correlated cognitive change in a sample of 391 initially nondemented older adults who were tested annually for up to 16 years. Between-person correlations among rates of change (range=.56-.61) were partly attributable to model misspecification and the aggregation of heterogeneous groups of individuals. Correlated within-person cognitive change was much stronger in the cases (.45-.51) than in the noncases (.07-.18). These results demonstrate that correlated change may either signify causal commonality or the cumulative effects of multiple age-related conditions that can affect multiple cognitive systems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An examination of depression in the spouses of stroke patients.

Examined the prevalence and correlates of depression in the spouses (SPs [mean age 61.8 yrs]) of 41 stroke patients (SPTs [mean age 65.6 yrs]). SPs reported their own mood on the Beck Depression Inventory (BDI) and rated their partners' (the SPTs') mood using the Hamilton Rating Scale for Depression (HRSD). A clinician evaluated the SPTs' mood using the HRSD and their cognitive/language and physical impairments using a battery of neuropsychological tests. Results indicated that 44% of the SPs were depressed. SP depression was not correlated with the severity of the SPTs' physical, cognitive, or language impairments. However, the SPs' perception of the SPTs' mood was a better predictor of the SPs' mood than was the clinicians' evaluation of the SPTs' mood. (PsycINFO Database Record (c) 2010 APA, all rights reserved)