Cegep de Thetford

For the last 70 years, the demand for semiconductorshas grownglobally, as they are ubiquitous in technologies ranging from microprocessorsand memory in computers and servers to sensors and communication systemsin smartphones and automobiles. This ongoing expansion drives a relentlessneed for higher performances and greater reliability. However, itis imperative to shift to more environmentally sustainable manufacturingpractices. Biobased adhesives, which have adapted to every ecologicalniche, are a promising alternative to petroleum-based packaging epoxyglues to drive the next generation of green semiconductor manufacturing.In this perspective, we describe the key requirements and conventionalpractices for measuring the performances of adhesives suitable formicroelectronic packaging. We highlight two promising biosourced alternatives:biomass derived from plants and adhesives produced by bacteria. Plant-derivedadhesives are described with a particular focus on how successfullythey match the mechanical, thermal, and processing properties desirablefor microelectronic applications. Bacterial adhesives, on the otherhand, have yet to be explored as sustainable alternatives in thisfield. They represent an abundant niche of compounds with unique properties,and strong and versatile adhesion, offering unique opportunities fordeveloping advanced packaging solutions. We discuss advanced characterizationmethods needed to evaluate the physical and chemical properties ofbiosourced materials across multiple length scales, guiding theireventual integration into high-performance, environmentally responsiblepackaging solutions. Finally, we assess the maturity, cost, and environmentalfootprint of these biobased alternatives to better gauge their potentialfor industrial deployment.

A new synthesis of PDTBTBz-2F anti was developed via DHAP using a partially biobased monomer. Two pathways were compared by DFT, experiments and OSC tests, benchmarked to Stille coupling, and preliminarily adapted to continuous-flow.

For n > 1, we consider a reaction-diffusion equationut = Δu + α(y)∇ · G(u) + f(u), (0.2)in an unbounded cylinder Ω := R×D, where D ⊂ Rn−1 is a smooth bounded domain, with a presence of a convection term, under both Neumann and Dirichlet boundary conditions on ∂Ω. For both types of boundary condition, we consider two different forms of convection term, namely : α(y)∇·G(u) and∇ · (α(y)G(u)). The reaction term f is “monostable”. In both Neumann and Dirichlet cases, we prove that there exists a critical speed c⋆ ∈ R such that there exists a travelling front solution of the form u(x, t) = w(x1 −ct, y) with speed c if and only if c ≥ c⋆, where x1 is the coordinate corresponding to theaxis of the cylinder. The critical speed c⋆ often plays an important role for monostable problems by characterizing the long-time behaviour of the initial value problem. The existence of travelling waves for all c ≥ c⋆ is typical of monostable problems such as the prototype Fisher-KPP equation.We give a min-max formula for the speed c⋆. For both types of boundary conditions, we prove that c⋆ is bounded below by a quantity c′ which is related to a certain eigenvalue problem, associated with the linearized problem around 0. Note that under Dirichlet boundary conditions, an extra assumption is needed to ensure that c′ exists, namely, f′(0) has to be greater than the principal eigenvalue of the linearized operator. We discuss two special cases where the equality c⋆ = c′ holds. Under both Neumann and Dirichlet boundary conditions, the first special case is when G = (G1, 0, · · ·, 0), assuming the so-called KPP condition for f and that α(y)G′ 1(u) ≥ α(y)G′ 1(0), for all y ∈ D and all u ∈ (0, 1). The second case is treated only under Neumann boundary conditions : when G′ 1(0) = 0, assuming the KPP condition for f, and that α(y)G′ 1(u) ≥ 0, for all y ∈ D and u ∈ (0, 1). Note that in that case, we give an explicit formula : c⋆ = c′ = 2 p f′(0). Under Dirichlet boundary conditions, we highlight the influence of the domain D, the reaction term f and the convection term α(y)∇ · G(u) on the critical speed c⋆. In the special case where G = (G1, 0, ···, 0), using that c⋆ = c′, we use the eigenvalue problem related to c′ to establish some optimization results for c⋆.

We present a potential growth thermal index (PGTI) and assess its correlation with juvenile Atlantic salmon Salmo salar fork length data collected near the end of the growth season in a range of latitudinal locations and geographic scales (watershed, regional, continental) across the American north-east. The PGTI is based on two components: a water temperature-dependent growth curve and a water temperature time series continuously describing the thermal environment preceding fish sampling. Testing various shapes and characteristics of the temperature-growth curve against fish length data revealed strong positive correlations for all combinations. PGTI warming, calculated only from the beginning of the growth season until maximum summer temperature is reached, consistently performed well in explaining fish size-at-age across the latitudinal gradient and the three geographic scales that were considered. Varying thermal contrasts created by repeat subsampling of the dataset showed that fish length is better explained by the level of thermal contrast within the dataset than the geographical scale of analysis. A simple generalized linear model using a log link function with PGTI warming, fish density and water discharge as predictors explained 87% of the variance of size-at-age of 0+ and 1+ juvenile Atlantic salmon.

ABSTRACT Despite the abundance of literature on university performance (UP), few studies have examined the impacts of knowledge management (KM) enablers and KM processes on UP. This study introduces a model explaining the variance in UP, including KM enablers, which include organisational enablers (OEs) and personal enablers (PEs) as indirect determinants, and KM processes as direct determinants. Data from 296 Vietnamese university lecturers and managerial staff indicated that KM processes mediate the link between KM and UP. However, OEs and PEs had unequal impacts on KM processes. Of the three OE components, organisational rewards and culture had a direct impact on KM, while organisational leadership had an indirect impact through the two other processes. Of the two PE components, knowledge self-efficacy had a significant influence on KM. The findings indicate ways for Vietnamese universities to enhance performance and thus develop sustainably.

The preparation of heterocyclic compounds often involves the use of petroleum-based or non-renewable sources. Considering the actual societal and environmental awareness towards sustainable chemistry, new and green sources of organic carbon are sought. In this regard, vanillin is a molecular building block that can be obtained from the depolymerization of lignin. Due to its different functional groups (hydroxyl, aldehyde, and methoxy) vanillin can undergo a variety of reactions leading to various heterocycles such as pyrimidines, quinoxalines, imidazoles or thiazoles to name a few. This mini-review will focus on the preparation of accessible heterocycles building blocks from the vanillin moiety in regard to the medicinal, pharmaceutical, and material fields.

Les finalités constituent les lignes directrices de l’intervention éducative. Dans le contexte spécifique de l’intervention avec les technologies auprès des élèves qui ont des incapacités intellectuelles, ces finalités se résument au développement de l’autonomie et à l’atteinte d’une réelle participation sociale. Plusieurs auteurs réfèrent aussi à l’autodétermination comme une des finalités de l’éducation des personnes qui ont des incapacités intellectuelles (Lachapelle & Wehmeyer, 2003; Wehmeyer et coll., 2007). Ce texte présente ces finalités, de même que les défis et obstacles de leur transposition en buts et objectifs clairs et pertinents au regard des besoins des élèves qui ont des incapacités intellectuelles. Il propose aussi des recommandations allant dans ce sens.

Patrick KAPLANIAN, Les Ladakhi du Cachemire. Montagnards du Tibet occidental, Paris, librairie l’Astrolabe, 1981, 317 pages, bibliographie, lexique. An article from journal Culture (Volume 4, Number 2, 1984, pp. 3-94), on Érudit.