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Lieux intergénérationnels, un réseau d'espaces et de parcours à Grimisuat en Valais.
No full textLe projet définit des lieux de rencontre propices au tissage des liens entre les générations. Le site choisi est le village de Grimisuat en Valais. Les espaces publics qui le constituent ainsi que les parcours qui le traversent sont des facteurs essentiels à la compréhension du tissu villageois. Le centre du village, entrelacs de bâtis anciens, de constructions rurales, de ruelles sinueuses et ludiques, possède de vieilles granges partiellement désaffectées. Vestiges d'une structure économique et sociale disparue, ces granges requièrent une nouvelle fonction. Le projet propose de faire revivre ces structures vernaculaires grâce à un réseau d'activités intergénérationnelles. Le système d'agglutination et de mise en constellation des volumes des granges, ainsi que la requalification des accès et l'ouverture de certaines façades, favorisent l'émergence d'atmosphères différenciées. Ces interventions ponctuelles sont soucieuses de conserver la matérialité et la patine de l'existant. La place centrale, qui entretient une relation privilégiée avec son tissu bâti périphérique, est également requalifiée en lien avec le projet d'une salle polyvalente actuellement en cours de planification. Le programme se compose d'une ludothèque, d'une scène de spectacle et d'ateliers de transmission du savoir-faire local. L'attractivité du village est ainsi renforcée par ce programme, grâce à son insertion dans un bâti qui préserve le paysage villageois, dont la pérennité est assurée.SAR-DLAURELASURCote: 2013.071Archive: MEM.1/1 A4 vertical, CD.1/1Groupe de suivi: Bassi Andrea (dir. pédagogique); Pedrazzini Yves (prof.); Dreier Yves (maître EPFL); Michaud Hugues (expert)Professeur responsable de l'Enoncé: Pedrazzini Yves (ENAC INTER LASUR)Enoncé théorique de master: Structures et relations entre les générations. Réflexions pour la création d'un espace intergénérationnel dans la commune de Grimisuat en Valais. [Enoncé théorique en commun avec Thanh Nhien Nguyen-Le]Voir aussi le projet de Mme T. N. Nguyen-L
SYNCHROCYCLOTRON PRELIMINARY DESIGN FOR A DUAL HADRONTHERAPY CENTER
No full textThe Italian research foundation TERA has proposed an innovative accelerator solution, called “Cyclinac” [1], dedicated to hadrontherapy, the technique of tumor radiotherapy which employs ion beams, in particular protons and carbon ions. It is composed of a fixed-energy cyclotron injecting into a variable-energy linac. This paper describes the preliminary design of a dedicated superconducting synchrocyclotron providing fast cycling (400 Hz) beams of 230 MeV/u C6+ and H2 + (Kbending = 920 MeV).LPA
Full-waveform GPR inversion to assess chloride gradients in concrete
No full textThe spreading of deicing salt on roads during winter and the consequent migration of chloride ions within concrete exposes structures reinforcement to corrosion. Reinforcement corrosion is problematic because it reduces the structure's load carrying capacity and a long-term consequence can be structural failure. The use of Ground Penetrating Radar (GPR) technology is commonly applied to reinforced concrete structural mapping. This paper provides methodologies for the calculation of the electromagnetic parameters from GPR data accounting for chloride content and its distribution within concrete. The previous work showed that they are linked with water and chloride content. A GPR dataset was carried out with bi-static off-ground GPR antennas during an experiment recreating chloride contamination processes in concrete specimens. Two novel solutions are presented in this paper, their use on the dataset returned the electromagnetic parameters of the concrete specimens with knowledge of their thickness. Firstly, a ray-based approach is provided as a fast computational tool to determine average material properties. Thereafter, a novel full-waveform inversion based on a multilayered forward model is presented. It allows the identification of conductivity gradients present inside the concrete. Finally, the results are compared with additional destructive testing; they present a good correspondence. (C) 2013 Elsevier Ltd. All rights reserved.MC
Construction Of Self-Dual Integral Normal Bases In Abelian Extensions Of Finite And Local Fields
No full textLet be a finite Galois extension of fields with abelian Galois group . A self-dual normal basis for is a normal basis with the additional property that for . Bayer-Fluckiger and Lenstra have shown that when , then admits a self-dual normal basis if and only if is odd. If is an extension of finite fields and , then admits a self-dual normal basis if and only if the exponent of is not divisible by . In this paper we construct self-dual normal basis generators for finite extensions of finite fields whenever they exist. Now let be a finite extension of \Q_p, let be a finite abelian Galois extension of odd degree and let \bo_L be the valuation ring of . We define to be the unique fractional \bo_L-ideal with square equal to the inverse different of . It is known that a self-dual integral normal basis exists for if and only if is weakly ramified. Assuming , we construct such bases whenever they exist.CSA
Efficient Sequential and Parallel Algorithms for Multistage Stochastic Integer Programming Using Proximity
No full textWe consider the problem of solving integer programs of the form min {c^⊺ x : Ax = b, x ∈ ℤ_{⩾ 0}}, where A is a multistage stochastic matrix in the following sense: the primal treedepth of A is bounded by a parameter d, which means that the columns of A can be organized into a rooted forest of depth at most d so that columns not bound by the ancestor/descendant relation do not have non-zero entries in the same row. We give an algorithm that solves this problem in fixed-parameter time f(d,‖A‖_{∞})⋅ nlog^{(2^d)} n, where f is a computable function and n is the number of rows of A. The algorithm works in the strong model, where the running time only measures unit arithmetic operations on the input numbers and does not depend on their bitlength. This is the first fpt algorithm for multistage stochastic integer programming to achieve almost linear running time in the strong sense. For two-stage stochastic integer programs, our algorithm works in time 2^{((r+s)‖A‖_∞)^{(r(r+s))}}⋅ nlog^{(rs)} n, which improves over previous methods both in terms of the polynomial factor and in terms of the dependence on r and s. In fact, for r = 1 the dependence on s is asymptotically almost tight assuming the Exponential Time Hypothesis. Our algorithm can be also parallelized: we give an implementation in the PRAM model that achieves running time f(d,‖A‖_{∞})⋅ log^{(2^d)} n using n processors. The main conceptual ingredient in our algorithms is a new proximity result for multistage stochastic integer programs. We prove that if we consider an integer program P, say with a constraint matrix A, then for every optimum solution to the linear relaxation of P there exists an optimum (integral) solution to P that lies, in the _{∞}-norm, within distance bounded by a function of ‖A‖_{∞} and the primal treedepth of A. On the way to achieve this result, we prove a generalization and considerable improvement of a structural result of Klein for multistage stochastic integer programs. Once the proximity results are established, this allows us to apply a treedepth-based branching strategy guided by an optimum solution to the linear relaxation. LIPIcs, Vol. 204, 29th Annual European Symposium on Algorithms (ESA 2021), pages 33:1-33:14DISOP
Channel Coding for Progressive Images in a 2-D Time-Frequency OFDM Block With Channel Estimation Errors
No full textCoding and diversity are very effective techniques for improving transmission reliability in a mobile wireless environ- ment. The use of diversity is particularly important for multimedia communications over fading channels. In this work, we study the transmission of progressive image bitstreams using channel coding in a 2-D time-frequency resource block in an OFDM network, em- ploying time and frequency diversities simultaneously. In partic- ular, in the frequency domain, based on the order of diversity and the correlation of individual subcarriers, we construct symmetric -channel FEC-based multiple descriptions using channel erasure codes combined with embedded image coding. In the time domain, a concatenation of RCPC codes and CRC codes is employed to pro- tect individual descriptions. We consider the physical channel con- ditions arising from various coherence bandwidths and coherence times, leading to a range of orders of diversities available in the time and frequency domains. We investigate the effects of different error patterns on the delivered image quality due to various fade rates. We also study the tradeoffs and compare the relative effec- tiveness associated with the use of erasure codes in the frequency domain and convolutional codes in the time domain under different physical environments. Both the effects of intercarrier interference and channel estimation errors are included in our study. Specifi- cally, the effects of channel estimation errors, frequency selectivity and the rate of the channel variations are taken into consideration for the construction of the 2-D time-frequency block. We provide results showing the gain that the proposed model achieves com- pared to a system without temporal coding. In one example, for a system experiencing flat fading, low Doppler, and imperfect CSI, we find that the increase in PSNR compared to a system without time diversity is as much as 9.4 dB.IE
La contamination de l’environnement aquatique en Suisse par les (micro)-plastiques
No full textBien que la pollution par les plastiques soit de mieux en mieux connue et fasse l’objet d’un nombre croissant de publications, les données concernant les eaux douces restent très limitées et morcelées. Cette problématique a été mise en évidence dès 2012 dans les eaux suisses, les recherches s’orientant vers une évaluation des concentrations et de la nature des particules plastiques dans plusieurs lacs et rivières. Des concentrations considérables ont été trouvées tant dans les eaux de surface que dans les sédiments des plages et benthiques, ainsi que dans divers organismes (poissons, oiseaux d’eau, moules zébrées). Les plastiques contenaient des additifs ainsi que des polluants hydrophobes adsorbés potentiellement toxiques. Les voies d’entrées dans l’environnement ont ensuite été étudiées, y compris les stations d’épurations, les eaux de ruissellements urbaines et les déversoirs d’orages ou encore d’autres compartiments comme l’atmosphère, les composts ou chantiers. Les quantités de plastique entrant dans l’environnement à tous les stades de leur cycle de vie en fonction de leur usage ont été estimées et confrontées aux types et quantités de plastiques pouvant être trouvées dans les différents compartiments environnementaux.GR-CE
ILLOCUTIONARY ACTS IN VLADIMIR PUTIN’S SPEECH OF THE RUSSIAN FEDERATION ON THE SITUATION IN UKRAINE
Get PDFThis research entitled “Illocutionary Act in Vladimir Putin’s Speech of the Russian Federation on the Situation in Ukraine”. The aims of this research are: 1) Finding the types of illocutionary acts in Vladimir Putin’s speech; 2) Describing the intention of illocutionary acts in Vladimir Putin’s Speech. This research used descriptive qualitative method. The object of this research is the speech deliverd by Vladimir Putin of the Russian Federation in the situation of Ukraine which aired on YouTube. The theory of the illocutionary used is Searle theory (1969). From the analysis, there are 220 utterances in Vladimir Putin’s speech. Those utterances are divided into 5 types of illocutionarry acts that consist of Representatives, Directives, Expressives, Declaratives, Commissives. The type of Representatives are performed in the force of reporting 69 data, retelling 34 data, assertion 28 data, believing 17 data, stating 12 data, informing 9 data, fact 7 data, explanation 7 data, conclusion 5 data, and confession 1 data. The types of Declaratives are performed in the force of question 14 data and declaring 1 data. The types of Expressives are performed in the force of regret 3 data, blaming 3 data, angering 1 data, and thanking 1 data. The types of Directives are performed in the force of request 4 data, advice 2 data, and suggestion 1 data. The type of Commissives is performed in the force of threatening 1 data
PRAGMATIC ANALYSIS OF HATE SPEECH COMMENTS ON INDONESIAN DIRECTORATE GENERAL OF TAXATION INSTAGRAM
Get PDFThe title of this research is Pragmatic Analysis of Hate Speech on Indonesian Directorate General of Taxation Instagram . The purpose of this research is to find the type of hate speech and the type of illocutionary acts in the comment column Instagram Indonesian Directorate General of Taxation account. The object in this research is the Indonesian Directorate General of Ta xation Instagram account, and the data source in this research is people\u27s comments in the comments column of the Indonesian Directorate General Taxation Instagram. The method used in this research is descriptive qualitative method. The grand theory used in this research is the pragmatic proposed by Yule (1996), illocutionary by Austin (1962), and Searle (1969). The result of this research there were 79 hate speeches which consist of 31 insulting, 10 defamation, 2 denigration, 17 unpleasant acts, 6 provoking, 12 inciting, and 1 spreading the hoax in the comment column on the Indonesian Directorate General Taxation Instagram account. Then the next result showed that from 106 hate Speech comments of netizens the Indonesian Directora te General Taxation Instagram account found there were 54 assertive, 21directives, 1 commissive, and 3 declarative. Based on the results, the most dominant hate speech is inciting, then illocutionary acts which are most often assertive
Genetic depletion of Polo-like kinase 1 leads to embryonic lethality due to mitotic aberrancies
No full textPolo-like kinase 1 (PLK1) is a serine/threonine kinase that plays multiple and essential roles during the cell division cycle. Its inhibition in cultured cells leads to severe mitotic aberrancies and cell death. Whereas previous reports suggested that Plk1 depletion inmice leads to a non-mitotic arrest in early embryos, we show here that the bi-allelic Plk1 depletion in mice certainly results in embryonic lethality due to extensive mitotic aberrations at the morula stage, including multi-and mono-polar spindles, impaired chromosome segregation and cytokinesis failure. In addition, the conditional depletion of Plk1 during mid-gestation leads also to severe mitotic aberrancies. Our data also confirms that Plk1 is completely dispensable for mitotic entry in vivo. On the other hand, Plk1 haploinsufficient mice are viable, and Plk1-heterozygous fibroblasts do not harbor any cell cycle alterations. Plk1 is overexpressed in many human tumors, suggesting a therapeutic benefit of inhibiting Plk1, and specific small-molecule inhibitors for this kinase are now being evaluated in clinical trials. Therefore, the different Plk1 mouse models here presented are a valuable tool to reexamine the relevance of the mitotic kinase Plk1 during mammalian development and animal physiology.ISRE