Mohammad Fazleh Elahi - Academia.edu (original) (raw)

Papers by Mohammad Fazleh Elahi

Zenodo (CERN European Organization for Nuclear Research), Jun 27, 2022

WP3 three research challenges are tackled by three respective tasks, each responsible for one sof... more WP3 three research challenges are tackled by three respective tasks, each responsible for one software component: ● Task 3.1 , Prêt-à-LLOD Transform addresses the challenge of " Transforming language resources and language data ". Methodologies are developed for the transformation of language resources and language data into LLOD representations. ● Task 3.2 , Prêt-à-LLOD Link addresses the challenge of " Linking conceptual and lexical data for language services " . Novel (semi-)automatic methods are studied that aim at establishing links across multilingual LLOD datasets and models. ● Task 3.3 , Prêt-à-LLOD Workflows addresses the challenge to create " Workflows for Portable and Scalable Semantic Language Services " . A protocol, based on semantic markup, is developed to enable language services to be easily connected into multi-server workflows. The primary software component for data transformation is Fintan (S...

Zenodo (CERN European Organization for Nuclear Research), Sep 9, 2021

This document is a short report that accompanies the software deliverable D3.4 "Language Resource... more This document is a short report that accompanies the software deliverable D3.4 "Language Resource and Service Linking''. The idea is to serve as a guideline of the different linking algorithms and systems developed in Prêt-à-LLOD as part of the "Prêt-à-LLOD-Link'' component: what are their basic functionalities, how the different sub-components are interrelated, and how they relate with other Prêt-à-LLOD components, particularly "Prêt-à-LLOD-Transform'' and "Prêt-à-LLOD-Workflows". The document serves also as a pointer to the repositories where the code, along with a more complete technical documentation, is available. While the initial Prêt-à-LLOD linking software is released with this deliverable, it will be continuously improved and updated until later stages of the project. In fact, further testing and development is expected as part of the integration of the linking component with the "Language Resource Transformation Software" (deliverable D3.3, due in month M33), with the pilots (deliverables D4.3, D4.5, D4.7, D4.9, due in month M36), and as part of the progress of the overall Prêt-à-LLOD research challenges (deliverable D3.6, due in month M39). Such deliverable D3.6 will provide the final snapshot of the software component initially delivered in D3.4, and will update its status at the end of the project.

The Semantic Web dream of a real world-wide graph of interconnected resources is – slowly but ste... more The Semantic Web dream of a real world-wide graph of interconnected resources is – slowly but steadily – becoming a concrete reality. Still, the whole range of models and technologies which will change forever the way we interact with the web, seems to be missing from every-day technologies available on our personal computers. Ontologies, annotation facilities and semantic querying could (and should) bring new life to Personal Information Management, supporting users in contrasting the ever-growing information overload they are facing in these years, overwhelmed by plethora of communication channels and media. In this paper we present our attempt in bringing the Semantic Web Knowledge Management paradigm at the availability of diverse personal desktop tools (Web Browser, Mail clients, Agenda etc...), by evolving Web Browser Semantic extension Semantic Turkey to an extensible framework providing RDF data access at different levels: java access through OSGi extensions, HTTP access or ...

This document provides a survey over vocabularies for language resources and services and sketch ... more This document provides a survey over vocabularies for language resources and services and sketch necessary extensions and the expected contribution of the Prêt-à-LLOD project to their further development for phenomena currently not sufficiently covered. Future updates with respect to this will be documented within Task 5.4. We focus on three main aspects of linguistically analyzed data 1. lexical-conceptual resources, i.e., repositories of terminology, lexical data, translation, and semantics, 2. linguistically annotated data, concerning linguistic analysis of textual or transcribed data, and 3. language resource terminology, i.e., linguistic data categories and metadata For these areas, we describe representative vocabularies from the Linguistic Linked Open Data community (RDF-based vocabularies) as well as other approaches (e.g., ISO TC37 standards), we identify a number of gaps, and we describe ongoing effort...

The LAPPS-CLARIN project is creating a "trust network" between the Language Applications (LAPPS) ... more The LAPPS-CLARIN project is creating a "trust network" between the Language Applications (LAPPS) Grid and the WebLicht workflow engine hosted by the CLARIN-D Center in Tübingen. The project also includes integration of NLP services available from the LINDAT/CLARIN Center in Prague. The goal is to allow users on one side of the bridge to gain appropriately authenticated access to the other and enable seamless communication among tools and resources in both frameworks. The resulting "meta-framework" provides users across the globe with access to an unprecedented array of language processing facilities that cover multiple languages, tasks, and applications, all of which are fully interoperable.

There is a well-known lexical gap between content expressed in the form of natural language (NL) ... more There is a well-known lexical gap between content expressed in the form of natural language (NL) texts and content stored in an RDF knowledge base (KB). For tasks such as Information Extraction (IE), this gap needs to be bridged from NL to KB, so that facts extracted from text can be represented in RDF and can then be added to an RDF KB. For tasks such as Natural Language Generation, this gap needs to be bridged from KB to NL, so that facts stored in an RDF KB can be verbalized and read by humans. In this paper we propose LexExMachina, a new methodology that induces correspondences between lexical elements and KB elements by mining class-specific association rules. As an example of such an association rule, consider the rule that predicts that if the text about a person contains the token "Greek", then this person has the relation nationality to the entity Greece. Another rule predicts that if the text about a settlement contains the token "Greek", then this sett...

In this paper we describe the contributions made by the European H2020 project "Prêt-à-LLOD&... more In this paper we describe the contributions made by the European H2020 project "Prêt-à-LLOD" ('Ready-to-use Multilingual Linked Language Data for Knowledge Services across Sectors') to the further development of the Linguistic Linked Open Data (LLOD) infrastructure. Prêt-à-LLOD aims to develop a new methodology for building data value chains applicable to a wide range of sectors and applications and based around language resources and language technologies that can be integrated by means of semantic technologies. We describe the methods implemented for increasing the number of language data sets in the LLOD. We also present the approach for ensuring interoperability and for porting LLOD data sets and services to other infrastructures, as well as the contribution of the projects to existing standards.

We present a methodology for analyzing cross-cultural similarities and differences using language... more We present a methodology for analyzing cross-cultural similarities and differences using language as a medium, love as domain, social media as a data source and 'Terms' and 'Topics' as cultural features. We discuss the techniques necessary for the creation of the social data corpus from which emotion terms have been extracted using NLP techniques. Topics of love discussion were then extracted from the corpus by means of Latent Dirichlet Allocation (LDA). Finally, on the basis of these features, a cross-cultural comparison was carried out. For the purpose of cross-cultural analysis, the experimental focus was on comparing data from a culture from the East (India) with a culture from the West (United States of America). Similarities and differences between these cultures have been analyzed with respect to the usage of emotions, their intensities and the topics used during love discussion in social media.

We present a dialogue system and reference handling component for efficient and natural referenti... more We present a dialogue system and reference handling component for efficient and natural referential grounding dialogues from 2D images. Using a probabilistic representation of qualitative concepts, the system uses flexible concept assignment in reference handling for bridging conceptual gaps between the system and the user, and engages in clarification dialogues based on an evaluation of miscommunication risk.

Many question answering (QA) systems over RDF induced from question-query pairs using some machin... more Many question answering (QA) systems over RDF induced from question-query pairs using some machine learning technique suffer from a lack of controllability, making the governance and incremental improvement of the system challenging, not to mention the initial effort of collecting and providing training data. As an alternative, we present a model-based QA approach that uses an ontology lexicon in lemon format and automatically generates a lexicalized grammar used to interpret and parse questions into SPARQL queries. The approach gives maximum control over the QA system to the developer as every lexicon extension increases the coverage of the grammar, and thus of the QA system, in a predictable way. We describe our approach to generating grammars from lemon lexica and show how these grammars generate specific questions that we index to support fast QA performance in a prototype that answers questions with respect to DBpedia.

Proceedings of the 10th Web as Corpus Workshop, 2016

This paper employs both a web-ascorpus and a Twitter-as-corpus approach to present a longitudinal... more This paper employs both a web-ascorpus and a Twitter-as-corpus approach to present a longitudinal case study of the establishment of three recently coined, synonymous neologisms: rapefugee, rapeugee and rapugee. We describe the retrieval and processing of the web and Twitter data and discuss the dynamics of the competition between the three forms within and across both datasets based on quantitative summaries of the results. The results show that various languageexternal events boost the usage of the terms both on the web and on Twitter, with the latter typically ahead of the former by some days. Beside absolute frequencies, we distinguish between several special usages of the target words and their effects on the establishment process. For the web corpus, we examine target words appearing in the title of websites and metalinguistic usages; for the Twitter corpus, we examine hashtag uses and retweets. We find that the use of hashtags and retweets significantly affects the spread of the neologisms both on Twitter and on the web.

Journal of Physics D: Applied Physics, 2015

In this paper the effect of biaxial and uniaxial strain on the mobility of single-layer MoS 2 for... more In this paper the effect of biaxial and uniaxial strain on the mobility of single-layer MoS 2 for temperatures T > 100 K is investigated. Scattering from intrinsic phonon modes, remote phonon and charged impurities are considered along with static screening. Ab-initio simulations are utilized to investigate the strain induced effects on the electronic bandstructure and the linearized Boltzmann transport equation is used to evaluate the low-field mobility under various strain conditions. The results indicate that the mobility increases with tensile biaxial and tensile uniaxial strain along the armchair direction. Under compressive strain, however, the mobility exhibits a non-monotonic behavior when the strain magnitude is varied. In particular, with a relatively small compressive strain of 1% the mobility is reduced by about a factor of two compared to the unstrained condition, but with a larger compressive strain the mobility partly recovers such a degradation.

Physical Review B, 2015

We report a first-principles study on the elastic, vibrational, and electronic properties of the ... more We report a first-principles study on the elastic, vibrational, and electronic properties of the recently synthesized phosphorene. By calculating the Grüneisen parameters, we evaluate the frequency shift of the Raman/infrared active modes via symmetric biaxial strain. We also study a strain-induced semiconductor-metal transition, the gap size, and the effective mass of carriers in various strain configurations. Furthermore, we unfold the emergence of a peculiar Dirac-shaped dispersion for specific strain conditions including the zigzag-oriented tensile strain. The observed linear energy spectrum has distinct velocities corresponding to each of its linear branches and is limited to the Γ − X direction in the first Brillouin zone.

2008 International Conference on Electrical and Computer Engineering, 2008

An RFID tag consists of tag antenna and a microchip. The terminal impedance of the chip varies in... more An RFID tag consists of tag antenna and a microchip. The terminal impedance of the chip varies in two states. It also affects the RCS and read range of the tag antenna. This paper presents a circularly polarized compact UHF RFID tag antenna with impedance of commercially available chip. The tag antennapsilas RCS patterns and read range are also analyzed in different planes.

2007 10th International Conference on Computer and Information Technology, 2007

AbstractBinary Decision Diagrams (BDDs) provide a canonical and compact representation of Boolea... more AbstractBinary Decision Diagrams (BDDs) provide a canonical and compact representation of Boolean functions. The canonical property makes it possible to easily detect many useful properties of Boolean functions such as size of the support set, symmetry between variables etc. ...

2008 International Conference on Electrical and Computer Engineering, 2008

AbstractThis paper presents a compact (35x36.5 mm) RFID tag antenna which has large RCS patterns... more AbstractThis paper presents a compact (35x36.5 mm) RFID tag antenna which has large RCS patterns and easy conjugate impedance matching property by use of an inductively-coupled feeding. Its simulated maximum (match state) and minimum (short state) RCS are -15.36 ...

Dialogue systems for spatially situated tasks need to provide referential descriptions of spatial... more Dialogue systems for spatially situated tasks need to provide referential descriptions of spatially located objects and understand such descriptions from users. To construct such dialogue systems, it is useful to investigate how humans describe object locations in their immediate environment and how they ask about object locations in remote environments. In this paper, we address the semantic classification of the localization utterances found in the CReST corpus, which is a dialogue corpus of humans performing a cooperative, remote, search task. The aim is to explore the relation between specific semantic configurations and the dialogically and situationally embedded linguistic forms employed. Specifically, we first extracted different types of localization utterances from the corpus and then paired these with semantic categories provided by the linguistically motivated spatial ontology GUM. The paper concludes with a discussion of the characteristics of different types of localization expressions on the basis of spatial concepts and descriptions employed.

Solid State Communications, 2010

The electronic transmission and conductance of a gapped graphene superlattice were calculated by ... more The electronic transmission and conductance of a gapped graphene superlattice were calculated by means of the transfer-matrix method. The system that we study consists of a sequence of electron-doped graphene as wells and hole-doped graphene as barriers. We show that the transmission probability approaches unity at some critical value of the gap. We also find that there is a domain around the critical gap value for which the conductance of the system attains its maximum value.

Physical Review B, 2008

Propagation of acoustic waves in the one-dimensional (1D) random dimer (RD) medium is studied by ... more Propagation of acoustic waves in the one-dimensional (1D) random dimer (RD) medium is studied by three distinct methods. First, using the transfer-matrix method, we calculate numerically the localization length ξ of acoustic waves in a binary chain (one in which the elastic constants take on one of two values). We show that when there exists short-range correlation in the mediumwhich corresponds to the RD model-the localization-delocalization transition occurs at a resonance frequency ω c. The divergence of ξ near ω c is studied, and the critical exponents that characterize the power-law behavior of ξ near ω c are estimated for the regimes ω > ω c and ω < ω c. Second, an exact analytical analysis is carried out for the delocalization properties of the waves in the RD media. In particular, we predict the resonance frequency at which the waves can propagate in the entire chain. Finally, we develop a dynamical method, based on the direct numerical simulation of the governing equation for propagation of the waves, and study the nature of the waves that propagate in the chain. It is shown that only the resonance frequency can propagate through the 1D media. The results obtained with all the three methods are in agreement with each other.

Zenodo (CERN European Organization for Nuclear Research), Jun 27, 2022

Zenodo (CERN European Organization for Nuclear Research), Sep 9, 2021

Proceedings of the 10th Web as Corpus Workshop, 2016

Journal of Physics D: Applied Physics, 2015

Physical Review B, 2015

2008 International Conference on Electrical and Computer Engineering, 2008

2007 10th International Conference on Computer and Information Technology, 2007

2008 International Conference on Electrical and Computer Engineering, 2008

Solid State Communications, 2010

Physical Review B, 2008