Relations between Personality and Stressful Life Events

There is some evidence for a relationship between personality or personality-disordered: PD) traits and stressful life events: SLE) among young adults. Yet, the issue of how personality dispositions may be related to SLEs among middle age and older adults remains unresolved. In this prospective study, both self- and informant-report data were collected to examine the relationship between personality or PD traits and SLEs, and how these personality dispositions may moderate the effect of SLEs. Data were collected from 213 participants and their informants as part of the St. Louis Personality and Aging Network: SPAN) study, a longitudinal study of personality being conducted with a representative community sample of adults between the ages of 55 and 64 years from the St. Louis area. In general, neither self-reports nor informant-reports of personality or PD traits were generally predictive of the number of stressful life events. However, informant-reports of histrionic PD traits were associated with greater likelihood of experiencing interpersonal problems. Although the effects of stressful life events on subsequent psychosocial or marital adjustment were not generally moderated by personality or PD traits, informant-reports of cluster C PDs were associated with maladjustment for subsequent parental role adjustment and depressive symptoms. These results add significantly to the current understanding of not only the types and prevalence of stressful life events, but also in illustrating how associations between personality and stressful life events may be different among late middle-age adults compared to previous studies conducted with younger adults

Robust Energy Management for Green and Survivable IP Networks

Despite the growing necessity to make Internet greener, it is worth pointing out that energy-aware strategies to minimize network energy consumption must not undermine the normal network operation. In particular, two very important issues that may limit the application of green networking techniques concern, respectively, network survivability, i.e. the network capability to react to device failures, and robustness to traffic variations. We propose novel modelling techniques to minimize the daily energy consumption of IP networks, while explicitly guaranteeing, in addition to typical QoS requirements, both network survivability and robustness to traffic variations. The impact of such limitations on final network consumption is exhaustively investigated. Daily traffic variations are modelled by dividing a single day into multiple time intervals (multi-period problem), and network consumption is reduced by putting to sleep idle line cards and chassis. To preserve network resiliency we consider two different protection schemes, i.e. dedicated and shared protection, according to which a backup path is assigned to each demand and a certain amount of spare capacity has to be available on each link. Robustness to traffic variations is provided by means of a specific modelling framework that allows to tune the conservatism degree of the solutions and to take into account load variations of different magnitude. Furthermore, we impose some inter-period constraints necessary to guarantee network stability and preserve the device lifetime. Both exact and heuristic methods are proposed. Experimentations carried out with realistic networks operated with flow-based routing protocols (i.e. MPLS) show that significant savings, up to 30%, can be achieved also when both survivability and robustness are fully guaranteed

Energy management in communication networks: a journey through modelling and optimization glasses

The widespread proliferation of Internet and wireless applications has produced a significant increase of ICT energy footprint. As a response, in the last five years, significant efforts have been undertaken to include energy-awareness into network management. Several green networking frameworks have been proposed by carefully managing the network routing and the power state of network devices. Even though approaches proposed differ based on network technologies and sleep modes of nodes and interfaces, they all aim at tailoring the active network resources to the varying traffic needs in order to minimize energy consumption. From a modeling point of view, this has several commonalities with classical network design and routing problems, even if with different objectives and in a dynamic context. With most researchers focused on addressing the complex and crucial technological aspects of green networking schemes, there has been so far little attention on understanding the modeling similarities and differences of proposed solutions. This paper fills the gap surveying the literature with optimization modeling glasses, following a tutorial approach that guides through the different components of the models with a unified symbolism. A detailed classification of the previous work based on the modeling issues included is also proposed

Ken Thurston v. Cache County et al : Brief of Appellants

Appeal from a Judgment Dismissing Plaintiffs\u27 Complaint in the District Court of the First District in and for Cache County, Utah. The Honorable VeNoy Christoffersen, Judge

Parallel functional differentiation of an invasive annual plant on two continents.

Rapid local adaptation frequently occurs during the spread of invading species. It remains unclear, however, how consistent, and therefore potentially predictable, such patterns of local adaptation are. One approach to this question is to measure patterns of local differentiation in functional traits and plasticity levels in invasive species in multiple regions. Finding consistent patterns of local differentiation in replicate regions suggests that these patterns are adaptive. Further, this outcome indicates that the invading species likely responds predictably to selection along environmental gradients, even though standing genetic variation is likely to have been reduced during introduction. We studied local differentiation in the invasive annual plant Erodium cicutarium in two invaded regions, California and Chile. We collected seeds from across strong gradients in precipitation and temperature in Mediterranean-climate parts of the two regions (10 populations per region). We grew seeds from maternal families from these populations through two generations and exposed the second generation to contrasting levels of water and nutrient availability. We measured growth, flowering time and leaf functional traits across these treatments to obtain trait means and plasticity measures. We found strong differentiation among populations in all traits. Plants from drier environments flowered earlier, were less plastic in flowering time and reached greater size in all treatments. Correlations among traits within regions suggested a coordinated evolutionary response along environmental gradients associated with growing season length. There was little divergence in traits and trait intercorrelations between regions, but strongly parallel divergence in traits within regions. Similar, statistically consistent patterns of local trait differentiation across two regions suggest that local adaptation to environmental gradients has aided the spread of this invasive species, and that the formation of ecotypes in newly invaded environments has been relatively consistent and predictable

Black earths from Veneto and Piedmont (Northern Italy): origin, composition and potential use in different painting techniques

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Herbivory on Temperate Rainforest Seedlings in Sun and Shade: Resistance, Tolerance and Habitat Distribution

Differential herbivory and/or differential plant resistance or tolerance in sun and shade environments may influence plant distribution along the light gradient. Embothrium coccineum is one of the few light-demanding tree species in the temperate rainforest of southern South America, and seedlings are frequently attacked by insects and snails. Herbivory may contribute to the exclusion of E. coccineum from the shade if 1) herbivory pressure is greater in the shade, which in turn can result from shade plants being less resistant or from habitat preferences of herbivores, and/or 2) consequences of damage are more detrimental in the shade, i.e., shade plants are less tolerant. We tested this in a field study with naturally established seedlings in treefall gaps (sun) and forest understory (shade) in a temperate rainforest of southern Chile. Seedlings growing in the sun sustained nearly 40% more herbivore damage and displayed half of the specific leaf area than those growing in the shade. A palatability test showed that a generalist snail consumed ten times more leaf area when fed on shade leaves compared to sun leaves, i.e., plant resistance was greater in sun-grown seedlings. Herbivore abundance (total biomass) was two-fold greater in treefall gaps compared to the forest understory. Undamaged seedlings survived better and showed a slightly higher growth rate in the sun. Whereas simulated herbivory in the shade decreased seedling survival and growth by 34% and 19%, respectively, damaged and undamaged seedlings showed similar survival and growth in the sun. Leaf tissue lost to herbivores in the shade appears to be too expensive to replace under the limiting light conditions of forest understory. Following evaluations of herbivore abundance and plant resistance and tolerance in contrasting light environments, we have shown how herbivory on a light-demanding tree species may contribute to its exclusion from shade sites. Thus, in the shaded forest understory, where the seedlings of some tree species are close to their physiological tolerance limit, herbivory could play an important role in plant establishment

Identifying modes of managing urban heritage:Results from a systematic literature review

This article presents a systematic literature review on urban heritage. It analyses (a) how urban heritage is conceptualized and interpreted in academic research, (b) urban heritage management modes. This literature review interprets urban heritage as a resource, collective memory, and space. It categorizes urban heritage management practice into six management modes according to stakeholders' collaboration levels: community-led, expert-coordinated, government-led, conflict-resolution, and privatization. These modes are analyzed based on different political regimes. The review observes five approaches to conceptualizing urban heritage: researching people's perspectives towards urban heritage, framing urban heritage, tracing the process of urban heritage forming, reviewing international policies and charters, and exploring the functions of urban heritage. Finally, for the future research agenda, the article recommends a focus on the following themes: the causal relations between factors and effects of adopting different urban heritage modes, researching community engagement and interactions between different levels of government, and analyzing conflict-resolution processes systematically.</p

Highly concentrated bitumen emulsions. A state of the art, review of experimental results

Les emulsions concentrades o altament concentrades de betum són un camp molt poc estudiat avui en dia. El treball és un estat de l'art de tots els papers que hi ha sobre aquest tema desde el mètode tradicional fins el HIPR (High Internal Phase Ratio)