Positive interaction facilitates landscape homogenization by shrub expansion in the forest–tundra ecotone

2020 ◽  
Vol 31 (2) ◽  
pp. 234-244 ◽  
Author(s):  
Ryo Kitagawa ◽  
Shota Masumoto ◽  
Keita Nishizawa ◽  
Ryo Kaneko ◽  
Takashi Osono ◽  
...  
Keyword(s):  
Shrub Expansion ◽  
Positive Interaction ◽  
Forest Tundra ◽  
Landscape Homogenization

Materialistic Orientation and Psyhological Well Being in Adolescents from 11th-12th Grade

2020 ◽  
Vol 8 (1) ◽  
pp. 30-36
Author(s):  
Vera Todorova
Keyword(s):  
Personal Growth ◽  
Well Being ◽  
Psychological Wellbeing ◽  
Positive Interaction ◽  
Extrinsic Goals ◽  
12Th Grade ◽  
Community Contribution ◽  
High Level ◽  
11Th Grade ◽  
Intrinsic Aspirations

The aim of the current study is to look for theoretically and empirically grounded proof for the correlation between aspirations – extrinsic and intrinsic- determining the motivation – and the psychological wellbeing of adolescents in 11th grade. Materialistic orientation is expressed in the preferences of extrinsic goals such as fame, wealth and image, while the intrinsic aspirations are related to preferences of aspirations for personal growth, personal relationships and community contribution. High level of psychological wellbeing is measured through the six elements from K. Ryff’s definition: self-acceptance, positive interaction with others, autonomy, managing of environment, meaning and personal growth. The research includes a group of 50 students in two Bulgarian high schools.

Corporate cash holdings and their implications on firm value in family and founder firms

2012 ◽  
Vol 9 (2) ◽  
pp. 257-273 ◽  
Author(s):  
James Lau ◽  
Joern H. Block
Keyword(s):  
Adverse Selection ◽  
Interaction Effect ◽  
Firm Value ◽  
Family Firms ◽  
Cash Holdings ◽  
Agency Cost ◽  
Economic Incentives ◽  
Positive Interaction ◽  
Superior Knowledge ◽  
Corporate Cash Holdings

This research investigates whether the presence of controlling founders and families has significant impact on the level of cash holdings, and their implications on firm value. The agency cost of cash holdings in founder firms is arguably less severe than family firms, due to founders’ economic incentives, strong psychological commitment and superior knowledge, whereas family firms are exposed to adverse selection and moral hazard as a result of altruism. Results indicate that founder firms hold a significantly higher level of cash holdings than family firms. In addition, there is a positive interaction effect between founder management and cash holdings on firm value, suggesting the presence of founders as managers helps to mitigate the agency costs of cash holdings.

scholarly journals Relative contributions of family history and a polygenic risk score on COPD and related outcomes: COPDGene and ECLIPSE studies

2020 ◽  
Vol 7 (1) ◽  
pp. e000755
Author(s):  
Matthew Moll ◽  
Sharon M. Lutz ◽  
Auyon J. Ghosh ◽  
Phuwanat Sakornsakolpat ◽  
Craig P. Hersh ◽  
...  
Keyword(s):  
Family History ◽  
Risk Score ◽  
Characteristic Curve ◽  
Significant Proportion ◽  
Chronic Obstructive ◽  
Polygenic Risk Score ◽  
Positive Interaction ◽  
Polygenic Risk ◽  
Mediation Analyses ◽  
The Impact

IntroductionFamily history is a risk factor for chronic obstructive pulmonary disease (COPD). We previously developed a COPD risk score from genome-wide genetic markers (Polygenic Risk Score, PRS). Whether the PRS and family history provide complementary or redundant information for predicting COPD and related outcomes is unknown.MethodsWe assessed the predictive capacity of family history and PRS on COPD and COPD-related outcomes in non-Hispanic white (NHW) and African American (AA) subjects from COPDGene and ECLIPSE studies. We also performed interaction and mediation analyses.ResultsIn COPDGene, family history and PRS were significantly associated with COPD in a single model (PFamHx <0.0001; PPRS<0.0001). Similar trends were seen in ECLIPSE. The area under the receiver operator characteristic curve for a model containing family history and PRS was significantly higher than a model with PRS (p=0.00035) in NHWs and a model with family history (p<0.0001) alone in NHWs and AAs. Both family history and PRS were significantly associated with measures of quantitative emphysema and airway thickness. There was a weakly positive interaction between family history and the PRS under the additive, but not multiplicative scale in NHWs (relative excess risk due to interaction=0.48, p=0.04). Mediation analyses found that a significant proportion of the effect of family history on COPD was mediated through PRS in NHWs (16.5%, 95% CI 9.4% to 24.3%), but not AAs.ConclusionFamily history and the PRS provide complementary information for predicting COPD and related outcomes. Future studies can address the impact of obtaining both measures in clinical practice.

scholarly journals Porcine Gammaherpesviruses in Italian Commercial Swine Population: Frequent but Harmless

Pathogens ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 47
Author(s):  
Giovanni Franzo ◽  
Michele Drigo ◽  
Matteo Legnardi ◽  
Laura Grassi ◽  
Maria Luisa Menandro ◽  
...  
Keyword(s):  
Real Time ◽  
Real Time Pcr ◽  
Clinical Signs ◽  
Northern Italy ◽  
Porcine Circovirus ◽  
Swine Industry ◽  
Positive Interaction ◽  
High Prevalence ◽  
Swine Population ◽  
Clinical Conditions

Differently from alpha- and betaherpesviruses affecting swine, interest in the recently discovered Suid gammaherpesvirus 3, Suid gammaherpesvirus 4, and Suid gammaherpesvirus 5, also known as porcine lymphotropic herpesviruses (PLHV-1, PLHV-2, and PLHV-3), has largely focused on their role as potential zoonotic agents in cases of xenotransplantation. However, their role as primary pathogens of swine or as co-factors for other lymphotropic infections has essentially been neglected. The present study aims at filling this gap, evaluating the association between PLHVs infection and different clinical conditions and/or porcine circovirus (PCV) co-infection. One hundred seventy-six samples were obtained from different animals located in a high-density pig area of Northern Italy in the period 2017–2020. The presence of PLHVs and PCVs was tested and quantified by specific real-time PCR: PLHVs were widespread among pigs (PLHV-1, PLHV-2, and PLHV-3 prevalence was 28.97%, 10.79%, and 4.54%, respectively) and detected in all considered tissues and clinical conditions. Frequent co-infections were also observed among PLHVs and with PCVs, although a significant association was not detected with the exception of a positive interaction between PLHV-1 and PLHV-3, and a negative one between PLHV-2 and PCV-2. Significantly, no association between PLHVs, alone or in co-infection, emerged with any of the considered clinical signs, their frequency being comparable between healthy and diseased animals. Based on these pieces of evidence and despite their high prevalence, PLHVs’ relevance for the swine industry appears negligible, either as primary pathogens or as predisposing factors for circovirus-induced diseases.

Patterns and processes of global shrub expansion

2011 ◽  
Vol 35 (4) ◽  
pp. 423-442 ◽  
Author(s):  
Adam T. Naito ◽  
David M. Cairns
Keyword(s):  
Simulation Modeling ◽  
Satellite Remote Sensing ◽  
Aerial Photograph ◽  
The Arctic ◽  
Shrub Expansion ◽  
Global Land ◽  
Technological Developments ◽  
Management Policies ◽  
Patterns And Processes ◽  
Land Types

Shrub expansion is a global phenomenon that is occurring on savannas, rangelands, and grasslands. In addition, this is an increasingly documented occurrence in the Arctic. Numerous recent studies have strived to pinpoint the drivers of this phenomenon, quantify the changes, and understand their implications for regional and global land use, disturbance regimes, and nutrient cycling. Inquiry into these topics has been facilitated by recent technological developments in satellite remote sensing, aerial photograph analysis, and computer simulation modeling. We provide a new review that accounts for more recent studies in these regions, Arctic shrub expansion, and technological and analytical developments. This four-part discussion focuses on observed patterns of shrub expansion in three rangeland types (desert grasslands, mesic grasslands, savannas) and the Arctic tundra, the primary causes of this expansion, critical comparisons and contrasts between these land types, and recommendations for future avenues of research. These new avenues can inform the development of future land management policies, as well as ongoing investigations to understand and mitigate the effects of climate change.

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