Search results for "Aide"

Resistance to bond degradation between dual-cure resin cements and pre-treated sintered CAD-CAM dental ceramics

2012

Objective: To evaluate the bond stability of resin cements when luted to glass-reinforced alumina and zirconia CAD/CAM dental ceramics. Study design: Eighteen glass-infiltrated alumina and eighteen densely sintered zirconia blocks were randomly conditioned as follows: Group 1: No treatment; Group 2: Sandblasting (125 µm Al2O3-particles); and Group 3: Silica-coating (50 µm silica-modified Al2O3-particles). Composite samples were randomly bonded to the pre-treated ceramic surfaces using different resin cements: Subgroup 1: Clearfil Esthetic Cement (CEC); Subgroup 2: RelyX Unicem (RXU); and Subgroup 3: Calibra (CAL). After 24 h, bonded specimens were cut into 1 ± 0.1 mm2 sticks. One-half of th…

Checkpoint Leonardo riemastuttaa koululaisia yhdistelemällä tiedettä, taidetta ja teknologiaa museoympäristössä

2014

Computational strategies for the design of new enzymatic functions

2015

In this contribution, recent developments in the design of biocatalysts are reviewed with particular emphasis in the de novo strategy. Studies based on three different reactions, Kemp elimination, Diels–Alder and Retro-Aldolase, are used to illustrate different success achieved during the last years. Finally, a section is devoted to the particular case of designed metalloenzymes. As a general conclusion, the interplay between new and more sophisticated engineering protocols and computational methods, based on molecular dynamics simulations with Quantum Mechanics/Molecular Mechanics potentials and fully flexible models, seems to constitute the bed rock for present and future successful desig…

A Metaphor for Identities in Transition through Urbanization and Globalization: Tofu and One Hundred Surnames

2019

The Chinese artist Chen Qiulin has been taking displacement and the resulting unrest in people’s identity as her persistent theme since the early 1990s. Focusing on a series of her works made since 2004 dealing explicitly with tofu and Chinese surnames, this paper examines her exploration of identities in transition in the context of China’s mass urbanization and globalization. By showing the artist’s conceptual evolution, her preference for materials and mediums, and her exhibition strategy, this paper explores two issues. First, it illuminates how the artist has transformed “tofu” and “surname” into a metaphor for the dilemma of identity under the urbanization in China. Second, it discuss…

Rising Ecological Awareness in Chinese Contemporary Art : An Analysis of the Cultural Environment

2016

The past three decades have witnessed an unprecedented ecological crisis in China; however, there has been very little study of ecological concern in Chinese contemporary art. Ecological awareness has emerged in Chinese contemporary art since the early 1990s. This paper explores the various cultural factors that are involved. First, the rising ecological awareness in Chinese art in the 1990s is a corollary of ideological changes, both in social politics and in art. Chinese contemporary art in the 1990s experienced a constantly ongoing social turn to counter the dominance of the market and to continue the critical spirit. When this inner need in Chinese contemporary art encountered the thoro…

Réponses des cellules de Nicotiana tabacum à des molécules microbiennes : évènements de signalisation précoce, influence de la dynamique membranaire …

2018

In their natural environment plants are in close interaction with beneficial, neutral, or pathogenic microbes, which are highly dependent on carbon resources exuded by plant roots. Sugar transport, which is a key process of plant physiology, is essential to support the fate of plant-microbe interactions. During evolution, plants have acquired the ability to perceive microbial molecules, initiating specific signal transduction cascades and leading to adapted response for microbe lifestyles (avirulent, virulent, or benefic). Plant survival will depend on the nature of the induced mechanisms. My PhD work, carried out on a simplified experimental system, contributes to the understanding of mech…

The expressive power of the shuffle product

2010

International audience; There is an increasing interest in the shuffle product on formal languages, mainly because it is a standard tool for modeling process algebras. It still remains a mysterious operation on regular languages.Antonio Restivo proposed as a challenge to characterize the smallest class of languages containing the singletons and closed under Boolean operations, product and shuffle. This problem is still widely open, but we present some partial results on it. We also study some other smaller classes, including the smallest class containing the languages composed of a single word of length 2 which is closed under Boolean operations and shuffle by a letter (resp. shuffle by a l…

A Formalism Supplementing Cognitive Semantics Based on Mereology

2007

ABSTRACT This paper is motivated by and aims to supplement Cognitive Semantics. Details of this latter prominent approach within contemporary linguistic research will not be discussed here. Rather, we focus on a formalization of the concept of Gestalt and provide a formal semantics that can be used to interpret a certain formal language (LM 0) with respect to a universe of structured wholes (Gestalts). Since a great deal of the analyses of linguistic organization that has been provided by Cognitive Semantics since the mid-1970s is based on the concept of Gestalt, the semantics unfolded in the following may be viewed as an attempt to provide a starting point for supplementing the yet informa…

Radical innovation by theoretical abstraction - a challenge for the user-centred designer

2016

AbstractIt is generally accepted that scientific disciplines such as psychology, sociology, and anthropology contribute beneficially to design by providing understanding of users’ needs, experiences, and desires. Arguably, however, these disciplines have more to contribute, because they include theories and models that can be applied as design frames and principles. More specifically, goal-setting, visualization, thematization, and conceptual reconfiguration are general mechanisms through which theories translate into design contributions. Actualizing radical design solutions via these mechanisms is discussed: theories provide appropriate means of abstraction, which allows ‘distance’ from u…

The role of Finnish leftists in Soviet-Finnish artistic exchanges during the late socialist period

2020

The article examines artistic exchanges between the USSR and Finland from the viewpoint of the Finnish left. After WWII, Finland was in a difficult geopolitical position; although not occupied by the USSR, it received little support from the West and so remained an independent capitalist democracy, with little foreign leverage. The Soviet influence was felt in many areas, and throughout the Cold War, Finland received many more world-class Soviet artists than any other Western country. This was in part a consequence of Finland’s proximity to the USSR, but the Finnish Communist Party, a major domestic political force, also played a role. Immediately after the war, organizations associated wit…