Miracle-dz/UniFAR-FTUs huggingface dataset:
Évolution de la microstructure du superalliage base nickel AD730 au cours des opérations de forgeage industrielles

Du fait de leurs tres bonnes proprietes mecaniques jusqu’a des temperatures approchant les 700°C, les superalliages base nickel polycristallins sont utilises pour la fabrication de disques de turbine (ou compresseur) de moteur d’avion. La voie conventionnelle pour l’elaboration et la mise en forme de ces alliages est la voie dite «coule-forge». Ainsi, une premiere serie de forgeages, appelee conversion, est appliquee au lingot coule afin d’homogeneiser et de raffiner la microstructure. Elle aboutit a un demi-produit appele billette qui est ensuite forgee/matricee a son tour pour obtenir l’ebauche de la piece finale. Pour les superalliages γ-γʹ avec de hautes teneurs en elements d’alliage, il est courant que l’etape de conversion ne soit pas suffisamment efficace pour completement homogeneiser la microstructure. C’est le cas pour l’alliage AD730TM recemment mis au point par la societe Aubert&Duval, dont les billettes presentent des zones de grains equiaxes recristallises et des plages restaurees caracteristiques. L’objectif de cette these est de comprendre comment les heterogeneites de microstructure peuvent se resorber pendant les dernieres etapes de forgeage menant a la microstructure finale. Apres avoir caracterise les heterogeneites de microstructure presentes dans les billettes d’alliage AD730TM, des essais thermomecaniques simulant un procede de forgeage ont ete appliques a la billette afin de suivre l’evolution des differentes microstructures locales. Les mecanismes d’evolutions statiques (pendant les traitements thermiques) et dynamiques (pendant la deformation) des zones equiaxes et des plages restaurees ont ete caracterises par microscopie electronique a balayage, EBSD et EDS. Une attention toute particuliere est portee a l’influence des precipites γʹ sur ces evolutions. Notamment, une interaction front de recristallisation-precipites jusque-la tres peu reportee dans la litterature et generant des precipites γʹ en quasi relation de macle ou de quasi meme orientation que la matrice a ete etudiee en detail.
UvA-DARE (Digital Academic Repository) Open Cross-Domain Visual Search

This paper addresses cross-domain visual search, where visual queries retrieve category samples from a different domain. For example, we may want to sketch an airplane and retrieve photographs of airplanes. Despite considerable progress, the search occurs in a closed setting between two pre-defined domains. In this paper, we make the step towards an open setting where multiple visual domains are available. This notably translates into a search between any pair of domains, from a combination of domains or within multiple domains. We introduce a simple – yet effective – approach. We formulate the search as a mapping from every visual domain to a common semantic space, where categories are represented by hyperspherical prototypes. Open cross-domain visual search is then performed by searching in the common semantic space, regardless of which domains are used as source or target. Domains are combined in the common space to search from or within multiple domains simultaneously. A separate training of every domain-specific mapping function enables an efficient scaling to any number of domains without affecting the search performance. We empirically illustrate our capability to perform open cross-domain visual search in three different scenarios. Our approach is competitive with respect to existing closed settings, where we obtain state-of-the-art results on several benchmarks for three sketch-based search tasks.
SIMULTANEOUS FAULT DETECTION AND CONTROL

In this paper, we consider a problem of Simultaneous Fault Detection and Control (SFDC). After presenting a fundamental separation theorem, we show that this problem is naturally modeled in terms of a mixed optimization problem. We present a constructive method for obtaing the solution to this problem leading to the design of a reduced-order implementable controller/detector system.
When Similarity Becomes Opposition: Synonyms and Antonyms Discrimination in DSMs

This paper analyzes the concept of opposition and describes a fully unsupervised method for its automatic discrimination from near-synonymy in Distributional Semantic Models (DSMs). The discriminating method is based on the hypothesis that, even though both near-synonyms and opposites are mostly distributionally similar, opposites are different from each other in at least one dimension of meaning, which can be assumed to be salient. Such hypothesis has been implemented in APAnt, a distributional measure that evaluates the extent of the intersection among the most relevant contexts of two words (where relevance is measured as mutual dependency), and its saliency (i.e. their average rank in the mutual dependency sorted list of contexts). The measure – previously introduced in some pilot studies – is presented here with two variants. Evaluation shows that it outperforms three baselines in an antonym retrieval task: the vector cosine, a baseline implementing the co-occurrence hypothesis, and a random rank. This paper describes the algorithm in details and analyzes its current limitations, suggesting that extensions may be developed for discriminating antonyms not only from near-synonyms but also from other semantic relations. During the evaluation, we have noticed that APAnt also has a particular preference for hypernyms.
0 Crawling A JAX-based Web Applications through Dynamic Analysis of User Interface State Changes

This is a substantially revised and expanded version of our paper ‘Crawling AJAX by Inferring User Interface State Changes’, which appeared in the Proceedings of the 8th International Conference on Web Engineering (ICWE), IEEE Computer Society, 2008 [Mesbah et al. 2008]. Authors’ address: A. Mesbah is with the department of Electrical and Computer Engineering, University of British Columbia, 2332 Main Mall, V6T1Z4 Vancouver, BC, Canada. E-mail: amesbah@ece.ubc. ca A. van Deursen and S. Lenselink are with the Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Mekelweg 4, 2628CD Delft, The Netherlands. E-mail: arie.vandeursen@tudelft.nl and S.R. Lenselink@student.tudelft.nl Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies show this notice on the first page or initial screen of a display along with the full citation. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, to redistribute to lists, or to use any component of this work in other works requires prior specific permission and/or a fee. Permissions may be requested from Publications Dept., ACM, Inc., 2 Penn Plaza, Suite 701, New York, NY 10121-0701 USA, fax +1 (212) 869-0481, or permissions@acm.org. c © 2011 ACM 1559-1131/2011/-ART0 $10.00 DOI 10.1145/0000000.0000000 http://doi.acm.org/10.1145/0000000.0000000
A New Triangular Spectral Element Method II: Mixed Formulation and hp-Error Estimates

Mixed triangular spectral element method using nodal basis on unstructured meshes is investigated in this paper. The method is based on equivalent first order system of the elliptic problem and rectangle-triangle transforms. It fully enjoys the tensorial structure and flexibility in handling complex domains by using nodal basis and unstructured triangular mesh. Different from the usual Galerkin formulation, the mixed form is particularly advantageous in this context, since it can avoid the singularity induced by the rectangle-triangle transform in the calculation of the matrices, and does not require the evaluation of the stiffness matrix. An hp a priori error estimate is presented for the proposed method. The implementation details and some numerical examples are provided to validate the accuracy and flexibility of the method. AMS subject classifications: 52B10, 65D18, 68U05, 68U07
Combined effects of climate warming and pharmaceuticals on a tri-trophic freshwater food web

Multiple anthropogenic stressors influence the functioning of ponds and lakes, but their combined effects are often little understood. We ran two mesocosm experiments to evaluate the effects of warming (+4°C above ambient) and environmentally relevant concentrations of a mixture of commonly used pharmaceuticals, an emerging class of chemical contaminants, on tri-trophic food webs representative of pelagic communities in ponds and other small standing waters. We quantified the main and interactive effects of warming and pharmaceuticals on each trophic level and attributed them to the direct effects of both stressors and the indirect effects arising through biotic interactions. Warming and pharmaceuticals had stronger effects in the summer experiment, altering zooplankton community composition and causing delayed or accelerated emergence of top insect predators. In summer, both stressors and top predators reduced filter-feeding zooplankton biomass, while warming and pharmaceuticals had opposing effects on phytoplankton. In the winter experiment, the effects were much weaker and primarily limited to a positive effect of warming on phytoplankton biomass. Overall, we show that pharmaceuticals can exacerbate the effects of climate warming in freshwater ecosystems, especially during the warm season. Our results demonstrate the utility of community-level studies across different seasons for the risk assessment of multiple emerging stressors in freshwater ecosystems.
Malleable iterative MPI applications

Malleability enables a parallel application's execution system to split or merge processes modifying granularity. While process migration is widely used to adapt applications to dynamic execution environments, it is limited by the granularity of the application's processes. Malleability empowers process migration by allowing the application's processes to expand or shrink following the availability of resources. We have implemented malleability as an extension to the process checkpointing and migration (PCM) library, a user‐level library for iterative message passing interface (MPI) applications. PCM is integrated with the Internet Operating System, a framework for middleware‐driven dynamic application reconfiguration. Our approach requires minimal code modifications and enables transparent middleware‐triggered reconfiguration. Experimental results using a two‐dimensional data parallel program that has a regular communication structure demonstrate the usefulness of malleability. Copyright © 2008 John Wiley & Sons, Ltd.
Evolution and Move toward Fifth-Generation Antenna

With the introduction of various antennas in the field of antenna technology, most of the constraints related to the transmission and receiving of the signals at different intervals have been resolved. By the rapid growth in industry and consequently high demands in the communication arena, the conventional antennas are unable to respond to these extended requirements. However, those initial antennas were suitably used in the field of technology. In the recent decades, by introducing new antenna technologies such as metamaterial structures, substrate integrated waveguide (SIW) structures and microstrip antennas with various feeding networks could meet the demands of the current systems. As stated before, in the frequency ranges of below 30 GHz, antenna size and bandwidth are of the important issues, so that novel antennas can be created in low frequencies, which are able to achieve reliable radiation properties when combined with new multi - band antennas. Generally, transmission lines are practical in low frequencies and short distances, while higher frequencies are mainly used due to bandwidth goals. This chap - ter is organized into three subsections related to the 5G wireless communication systems: antennas below 15 GHz or accordingly antennas with wavelength less than 1/20; anten - nas operating between 15 and 30 GHz; higher frequency antennas or millimeter-wave antennas, which are desired for above 40 GHz.
Analysis of Synthesized Ka-Band Linear Array Antenna for Beam Steering Applications

As beam steering antennas are being an ideal solution for many satellite applications, this paper is concerned on the design of a 16-element linear array antenna, using an RT Duroid substrate at 20.2 GHz for Ka-Band satellite communications. The design is initiated with single element and thereby incremented in steps to 2, 4, 8 and 16 elements. An optimum inter element spacing of 0. 73λ is considered for the purpose of fulfilling the desired scanning requirement. Performance analysis of the proposed antenna is analyzed mainly in terms of Relative Side Lobe level (RSLL) and Beam steering. To synthesize the antenna, weights of the antenna are considered according to Taylor’s amplitude distribution along the antenna aperture to attain a relative side lobe level of -25dB. The proposed 16-element linear array antenna achieved a maximum gain of 19.5dB and the main beam direction can be switched up to 50 o (±25 o ) without introduction any grating lobes. In addition to, other relevant antenna parameters such as reflection coefficient, VSWR, gain and efficiency of single, 2, 4, 8 and 16 element antennas are compared. The proposed linear array antenna is designed using Ansoft HFSS.
Tensor invariants and integration of differential equations

The connection between tensor invariants of systems of differential equations and explicit integration of them is discussed. A general result on the integrability of dynamical systems admitting a complete set of integral invariants in the sense of Cartan is proved. The existence of an invariant -form is related to the representability of the dynamical system in Hamiltonian form (with a symplectic structure which may be degenerate). This general idea is illustrated using an example of linear systems of differential equations. A general concept of flags of tensor invariants is introduced. General relations between the Kovalevskaya exponents of quasi-homogeneous systems of differential equations and flags of quasi-homogeneous tensor invariants having a certain structure are established. Results of a general nature are applied, in particular, to show that the general solution of the equations of rotation for a rigid body is branching in the Goryachev–Chaplygin case. Bibliography: 50 titles.
Social Learning and Peer Effects in Consumption: Evidence from Movie Sales

Using box-office data for all movies released between 1982 and 2000, I test the implications of a simple model of social learning in which the consumption decisions of individuals depend on information they receive from their peers. The model predicts different box office sales dynamics depending on whether opening weekend demand is higher or lower than expected. I use a unique feature of the movie industry to identify ex-ante demand expectations: the number of screens dedicated to a movie in its opening weekend reflects the sales expectations held by profit-maximizing theater owners. Several pieces of evidence are consistent with social learning. First, sales of movies with positive surprise and negative surprise in opening weekend demand diverge over time. If a movie has better than expected appeal and therefore experiences larger than expected sales in week 1, consumers in week 2 update upward their expectations of quality, further increasing week 2 sales. Second, this divergence is small for movies for which consumers have strong priors and large for movies for which consumers have weak priors. Third, the effect of a surprise is stronger for audiences with large social networks. Finally, consumers do not respond to surprises in first week sales that are orthogonal to movie quality, like weather shocks. Overall, social learning appears to be an important determinant of sales in the movie industry, accounting for 38% of sales for the typical movie with positive surprise. This implies the existence of a large "social multiplier'' such that the elasticity of aggregate demand to movie quality is larger than the elasticity of individual demand to movie quality.
This Review Is Part of a Thematic Series on Matrix Metalloproteinases, Which Includes the following Articles: Matrix Metalloproteinase Inhibition after Myocardial Infarction: a New Approach to Prevent Heart Failure? Matrix Metalloproteinase: Regulation and Dysregulation in the failing Heart Matrix M

—Increased activity of matrix metalloproteinases (MMPs) has been implicated in numerous disease processes, including tumor growth and metastasis, arthritis, and periodontal disease. It is now becoming increasingly clear that extracellular matrix degradation by MMPs is also involved in the pathogenesis of cardiovascular disease, including atherosclerosis, restenosis, dilated cardiomyopathy, and myocardial infarction. Administration of synthetic MMP inhibitors in experimental animal models of these cardiovascular diseases significantly inhibits the progression of, respectively, atherosclerotic lesion formation, neointima formation, left ventricular remodeling, pump dysfunction, and infarct healing. This review focuses on the role of MMPs in cardiovascular disease, in particular myocardial infarction and the subsequent progression to heart failure. MMPs, which are present in the myocardium and capable of degrading all the matrix components of the heart, are the driving force behind myocardial matrix remodeling. The recent finding that acute pharmacological inhibition of MMPs or deficiency in MMP-9 attenuates left ventricular dilatation in the infarcted mouse heart led to the proposal that MMP inhibitors could be used as a potential therapy for patients at risk for the development of heart failure after myocardial infarction. Although these promising results encourage the design of clinical trials with MMP inhibitors, there are still several unresolved issues. This review describes the biology of MMPs and discusses new insights into the role of MMPs in several cardiovascular diseases. Attention will be paid to the central role of the plasminogen system as an important activator of MMPs in the remodeling process after myocardial infarction. Finally, we speculate on the use of MMP inhibitors as potential therapy for heart failure. M yocardial infarction (MI) leads to complex architectural alterations involving both the infarcted and non-infarcted myocardium. Dilatation of the left ventricle and infarct thinning, also called infarct expansion, are the most prominent structural changes in the infarct region. 1 Patients exhibiting extensive infarct expansion after MI are more likely to experience complications, such as the development of congestive heart failure, aneurysm formation, and myocar-dial rupture. 2 The extent of ventricular dilatation after MI is related to several factors such as the magnitude of the initial
Regulation of Vascular Calcification Roles of Phosphate and Osteopontin

—Vascular calcification is prevalent in aging as well as a number of pathological conditions, and it is now recognized as a strong predictor of cardiovascular events in the general population as well as diabetic and end-stage renal disease patients. Vascular calcification is a highly regulated process involving inductive and inhibitory mechanisms. This article focuses on two molecules, phosphate and osteopontin, that have been implicated in the induction or inhibition of vascular calcification, respectively. Elevated phosphate is of interest because hyperphosphatemia is recognized as a major nonconventional risk factor for cardiovascular disease mortality in end-stage renal disease patients. Studies to date suggest that elevated phosphate stimulates smooth muscle cell phenotypic transition and mineralization via the activity of a sodium-dependent phosphate cotransporter. Osteopontin, however, appears to block vascular calcification most likely by preventing calcium phosphate crystal growth and inducing cellular mineral resorption. ( Circ Res . 2005;96:717-722.) to MGP (cid:3) / (cid:3) in which vascular calcification spontaneously develops. Mice deficient in both MGP and OPN (MGP (cid:3) / (cid:3) OPN (cid:3) / (cid:3) ) showed accelerated and enhanced vascular calcification compared with mice deficient in MGP alone (MGP (cid:3) / (cid:3) OPN (cid:4) / (cid:4) ). These indicate that inducible inhibitor of calcification in play an important role in the of light previous in of the inhibition of calcification in MGP (cid:3) (cid:3) be for by the potent apatite activity of phosphorylated OPN.
Myosin Crossbridge Activation of Cardiac Thin Filaments: Implications for Myocardial Function in Health and Disease

At the level of the myofibrillar proteins, activation of myocardial contraction is thought to involve switch-like regulation of crossbridge binding to the thin filaments. A central feature of this view of regulation is that Ca2+ binding to the low-affinity (≈3 μmol/L) site on troponin C alters the interactions of proteins in the thin filament regulatory strand, which leads to movement of tropomyosin from its blocking position on the thin filament and binding of crossbridges to actin. Although Ca2+ binding is a critical step in initiating contraction, this event alone does not account for the activation dependence of contractile properties of myocardium. Instead, activation is a highly cooperative process in which initial crossbridge binding to the thin filaments recruits additional crossbridge binding to actin as well as increased Ca2+ binding to troponin C. This review addresses possible roles of thin filament cooperativity in myocardium as a process that modulates the activation dependence of force and the rate of force development and also possible mechanisms by which cooperative signals are transmitted along the thick filament. Emerging evidence suggests that such mechanisms could contribute to the regulation of fundamental mechanical properties of myocardium and alterations in regulation that underlie contractile disorders in diseases such as cardiomyopathies.
TACCLE tests an automated assembly system in which the expected outcomes cannot be precisely defined and the actual results cannot be directly observed

* © ACM 2007. This is the authors’ version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in Communications of the ACM 50, 8 (Aug. 2007), 78–85. http://doi.acm.org/10.1145/1278201.1278210. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or direct commercial advantage and that copies show this notice on the first page or initial screen of a display along with the full citation. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, to redistribute to lists, or to use any component of this work in other works, requires prior specific permission and/or a fee. Permissions may be requested from Publications Dept, ACM Inc., 1515 Broadway, New York, NY 10036, USA, fax +1 (212) 869-0481, or permissions@acm.org.