Model-Free Data-Driven Methods in Mechanics: Material Data Identification and Solvers

This paper presents an integrated model-free data-driven approach to solid mechanics, allowing to perform numerical simulations on structures on the basis of measures of displacement fields on representative samples, without postulating a specific constitutive model. A material data identification procedure, allowing to infer strain-stress pairs from displacement fields and boundary conditions, is used to build a material database from a set of mutiaxial tests on a non-conventional sample. This database is in turn used by a data-driven solver, based on an algorithm minimizing the distance between manifolds of compatible and balanced mechanical states and the given database, to predict the response of structures of the same material, with arbitrary geometry and boundary conditions. Examples illustrate this modelling cycle and demonstrate how the data-driven identification method allows importance sampling of the material state space, yielding faster convergence of simulation results with increasing database size, when compared to synthetic material databases with regular sampling patterns.Comment: Revised versio

Supporting Complex Scientific Database Schemas in a Grid Middleware

“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.” DOI: 10.1109/AINA.2009.129The volume of digital scientific data has increased considerably with advancing technologies of computing devices and scientific instruments. We are exploring the use of emerging Grid technologies for the management and manipulation of very large distributed scientific datasets. Taking as an example a terabyte-size scientific database with complex database schema, this paper focuses on the potential of a well-known Grid middleware - OGSA-DQP - for distributing such datasets. In particular, we investigate and extend the data type support in this system to handle a complex schema of a real scientific database - the Sloan Digital Sky Survey database

Development of integrated database management and expert system for selection of materials to meet durability and damage tolerance requirements(completion Report)

This is the completion report of the project taken under the Grants-in-Aid scheme of the Aeronautics Research and Development Board. This report enunciates in detail the methodology adopted for arriving at the durability and damage tolerance values of materials for spectrum loading conditions. The document also lists the screen print of the demonstration package developed. The framework chosen for the material database is indicated together with a listing of the database structures, database files and format files

In Search of the Regional Diversification of Latin: Some Methodological Considerations in Employing the Inscriptional Evidence.

The aim of the project entitled “Computerized Historical Linguistic Database of Latin Inscriptions of the Imperial Age” (http://lldb.elte.hu) is to develop and digitally publish a fundamental computerized historical linguistic database that incorporates and manages the Vulgar Latin material of the Latin inscriptions from the European provinces of the Roman Empire. In my paper, however, I do not present the Database (as this has already been done, in Adamik 2009), but instead I consider only the methodology of extracting regional variations from inscriptions, with reference to Adams 2007. In connection with this I will show that the methodology recommended by Adams 2007 does not really work whereas that established by Herman (meaning the last version, in Herman 2000a) is the most efficient, and yields a solid basis for building up the new Database

EDV – Italian Medieval Epigraphy in the Vernacular. Some Editorial Problems Discussed,

EDV (Epigraphic Database Vernacular) is a database collecting the vernacular inscriptions produced in Italy from the late Medieval to the Early Modern Age, and is a part of the EAGLE and IDEA projects. The present contribution illustrates the criteria used for the description and indexing of all inscriptions that record public script in language(s) other than Latin. The material is very varied as regards language, script, provenance, support and function. The author discusses briefly the editorial criteria that may prove most appropriate for its publication

Selective Laser Sintering Process Management Using a Relational Database

With more and more materials used in the Selective Laser Sintering (SLS) process, it is becoming necessary to use a database to manage the process efficiently. In this paper, a relational database for the SLS process is described. The database includes powdered material data, sintering parameters, machine characteristics, mechanical properties and surface quality of prototypes. Use ofthis database will make it is easy to store and retrieve processing information and make decisions for planning the SLS. This paper will go on to describe how the database can be extended to include other RP technologies.Mechanical Engineerin

National Soils Database

End of project reportThe objectives of the National Soils Database project were fourfold. The first was to generate a national database of soil geochemistry to complete the work that commenced with a survey of the South East of Ireland carried out in 1995 and 1996 by Teagasc (McGrath and McCormack, 1999). Secondly, to produce point and interpolated spatial distribution maps of major, minor and trace elements and to interpret these with respect to underlying parent material, glacial geology, land use and possible anthropogenic effects. A third objective was to investigate the microbial community structure in a range of soil types to determine the relationship between soil microbiology and chemistry. The final objective was to establish a National Soils Archive

The Mental Database

This article uses database, evolution and physics considerations to suggest how the mind stores and processes its data. Its innovations in its approach lie in:- A) The comparison between the capabilities of the mind to those of a modern relational database while conserving phenomenality. The strong functional similarity of the two systems leads to the conclusion that the mind may be profitably described as being a mental database. The need for material/mental bridging and addressing indexes is discussed. B) The consideration of what neural correlates of consciousness (NCC) between sensorimotor data and instrumented observation one can hope to obtain using current biophysics. It is deduced that what is seen using the various brain scanning methods reflects only that part of current activity transactions (e.g. visualizing) which update and interrogate the mind, but not the contents of the integrated mental database which constitutes the mind itself. This approach yields reasons why there is much neural activity in an area to which a conscious function is ascribed (e.g. the amygdala is associated with fear), yet there is no visible part of its activity which can be clearly identified as phenomenal. The concept is then situated in a Penrosian expanded physical environment, requiring evolutionary continuity, modularity and phenomenality.Several novel Darwinian advantages arising from the approach are described

Monolingual and bilingual spanish-catalan speech recognizers developed from SpeechDat databases

Under the SpeechDat specifications, the Spanish member of SpeechDat consortium has recorded a Catalan database that includes one thousand speakers. This communication describes some experimental work that has been carried out using both the Spanish and the Catalan speech material. A speech recognition system has been trained for the Spanish language using a selection of the phonetically balanced utterances from the 4500 SpeechDat training sessions. Utterances with mispronounced or incomplete words and with intermittent noise were discarded. A set of 26 allophones was selected to account for the Spanish sounds and clustered demiphones have been used as context dependent sub-lexical units. Following the same methodology, a recognition system was trained from the Catalan SpeechDat database. Catalan sounds were described with 32 allophones. Additionally, a bilingual recognition system was built for both the Spanish and Catalan languages. By means of clustering techniques, the suitable set of allophones to cover simultaneously both languages was determined. Thus, 33 allophones were selected. The training material was built by the whole Catalan training material and the Spanish material coming from the Eastern region of Spain (the region where Catalan is spoken). The performance of the Spanish, Catalan and bilingual systems were assessed under the same framework. The Spanish system exhibits a significantly better performance than the rest of systems due to its better training. The bilingual system provides an equivalent performance to that afforded by both language specific systems trained with the Eastern Spanish material or the Catalan SpeechDat corpus.Peer ReviewedPostprint (published version

Database of material properties

Táto bakalárska práca sa zameriava na návrh databáze materiálových vlastností a vytvorenie užívateľského rozhrania pre editáciu týchto vlastností. V prvej časti nás oboznamuje zo základnými vlastnosťami materiálov. Ďalej pokračuje s oboznámením materiálov používaných v elektrotechnike na výrobu elektrických strojov a prístrojov. V ďalšej časti sa práca venuje návrhu samotnej databáze materiálových vlastností, a popisom jednotlivých časti databáze. V poslednej časti práce je popísaná funkčnosť a obsluha užívateľského rozhrania.This bachelor’s thesis focuses to create a database of the material properties and user interface for editing these properties. The first part of the project notifies us about the basic characteristics of materials. The next point talks about the materials which are used in electrical engineering to manufacture electrical machines and other appliances. The next part of the bachelor’s thesis describes the database design of material properties. The end of the thesis describes how to use the whole user interface and how it works.