Search results for "InSe"

2021

Sequence variation and regulatory variation in acetylcholinesterase genes contribute to insecticide resistance in different populations of Leptinotar…

2021

Abstract Although insect herbivores are known to evolve resistance to insecticides through multiple genetic mechanisms, resistance in individual species has been assumed to follow the same mechanism. While both mutations in the target site insensitivity and increased amplification are known to contribute to insecticide resistance, little is known about the degree to which geographic populations of the same species differ at the target site in a response to insecticides. We tested structural (e.g., mutation profiles) and regulatory (e.g., the gene expression of Ldace1 and Ldace2, AChE activity) differences between two populations (Vermont, USA and Belchow, Poland) of the Colorado potato beet…

Agricultural Insurances and Food Security. The New Climate Change Challenges

2015

Abstract Food security is one of the highest problems that the governments have to face in the third millennium. The complexity of this problem justifies the performance of researches, in view of finding viable solutions, not only in agriculture, but in other branches of activity too. Among them, the field of insurances is to be noted by its struggles to adapt to the new challenges. This paper tries to clarify the way in which insurances may become a key factor for the food security and addresses the following issues: food security factors; factors impacting on the development of agricultural insurances, risks connected to the agricultural activities and the way in which the insurance prote…

Choices and Enrollments in French Secondary and Higher Education: Repercussions for Second-Generation Immigrants

2013

En ligne sur http://www.jstor.org/discover/10.1086/670729?uid=16804784&uid=3738016&uid=2129&uid=2134&uid=2&uid=70&uid=3&uid=67&uid=16735408&uid=62&uid=5909928&sid=21102655856551; International audience; In France, the proportion of second-generation immigrants enrolling in tertiary education has increased as education has undergone a process of "democratization." This article analyzes their postsecondary choices, access to tertiary programs, dropout, and transition to the labor market, compared to those of students of French origin. Youths of Portuguese origin are more likely to enter vocational higher programs concordant with their preferences and have better chances of completing a tertia…

Determinants of Access to Academic Careers in France

2010

International audience; The recruitment of young PhD graduates in the academic sector is associated with great uncertainty regarding their potential teaching and research productivity. Thus, in order to recruit the best PhD graduates for permanent positions, employers (universities or research institutions in France) select according to signals sent by the applicants in their curriculum vitae: publications, post-doc position, host research institution.... In our paper, we analyse the factors affecting the access duration to a permanent job in three academic fields in France, using a sample of PhDs graduated in 2001. A discrete-time model, controlling for post-doc participation, is used to a…

Proximal and distal antecedents of problematic information technology use in organizations

2021

PurposeExcessive use of work-related information technology (IT) devices can lead to major performance and well-being concerns for organizations. Extant research has provided evidence of the incidence of such problematic IT use in organizations. We extend the understanding of problematic IT use by examining its individual (proximal) and organizational (distal) antecedents.Design/methodology/approachDrawing from the self-worth theory and the concept of fear of being left behind, we address proximal antecedents that lead to problematic IT use. Drawing from the concept of autonomy paradox, we address distal antecedents of problematic IT use through a positive association with the two proximal …

Ecological stoichiometry: a link between developmental speed and physiological stress in an omnivorous insect

2019

The elemental composition of organisms is a part of a suite of functional traits that may adaptively respond to fluctuating selection pressures. Life history theory predicts that predation risk and resource limitations impose selection pressures on organisms’ developmental time and are further associated with variability in energetic and behavioral traits. Between-individual differences in developmental speed, behaviors and physiology have been explained using the pace-of-life syndrome (POLS) hypothesis. However, how an organism’s developmental speed is linked with elemental body composition, metabolism and behavior is not well understood. We compared elemental body composition, latency to …

Solar UV-B radiation affects leaf quality and insect herbivory in the southern beech tree Nothofagus antarctica

2004

We examined the effects of solar ultraviolet-B (UV-B) radiation on plant-insect interactions in Tierra del Fuego (55°S), Argentina, an area strongly affected by ozone depletion because of its proximity to Antarctica. Solar UV-B under Nothofagus antarctica branches was manipulated using a polyester plastic film to attenuate UV-B (uvb-) and an Aclar film to provide near-ambient UV-B (uvb+). The plastic films were placed on both north-facing (i.e., high solar radiation in the Southern Hemisphere) and south-facing branches. Insects consumed 40% less leaf area from north- than from south-facing branches, and at least 30% less area from uvb+ branches than from uvb-branches. The reduced herbivory …

El procés d'informació i orientació professional: aproximació al perfil de l'orientador

2008

Durant els últims anys, el concepte d'educació permanent, també anomenat Life Long Learning, ha estat objecte de debat en el disseny de polítiques i accions educatives a Europa. L'orientació professional constitueix un element estructural i funcional del sistema educatiu i formatiu amb un objectiu clar: l'èxit d'una inserció professional i social satisfactòria de la persona. L'orientació professional comprèn aspectes d'informació acadèmica i laboral juntament amb altres aspectes fonamentals com és ara el coneixement de la persona i les possibilitats de l'entorn. La informació acadèmica i professional és un element imprescindible per a l'orientació. L'orientació professional s'ha de dirigir …

Les compétences non académiques utiles aux étudiants sur le marché du travail

2019

International audience; Les jeunes tout au long de leurs parcours de formation, au sein et en dehors du système éducatif, vont acquérir une diversité de compétences qu'ils peuvent valoriser sur le marché du travail. Si de nombreuses recherches ont montré que les niveaux de compétences en littératie et en numératie ont un impact spécifique sur le marché du travail, pour des diplômés qui ont pourtant le même niveau d'études (par exemple, Branche Seigeot, 2013), d'autres travaux se sont également intéressés à l'impact des "soft skills" sur le début des parcours professionnels. La définition exacte de ces "softs skills" comme leur mesure ouvrent la voie à d'importantes questions méthodologiques…