2,241 research outputs found
Enhancing the Locational Perception of Soft Classified Satellite Imagery Through Evaluation and Development of the Pixel Swapping Technique
No full textSpatial component is the key and most likely the first element of map making so that accurate spatial information improves the locational perception of map users. In this regard, soft classified satellite imagery conveys class proportions within pixels; however spatial distribution of the sub-pixels remains unknown. So, different visualization techniques (e.g. pie-chart representation of the proportions) are suggested to communicate the detailed land cover information. However, in each of which, the perception of actual spatial location of sub-pixels is definitely difficult for map users. Recently, the Super Resolution Mapping (SRM) techniques have been developed for optimization of the sub-pixels spatial arrangement based on the concepts of spatial dependency. These are relatively new methods which a comprehensive study on their performance and also their decisive parameters is a central issue for sub-pixel land cover mapping. In this research, the binary Pixel Swapping (PS) algorithm, as a prominent SRM algorithm, is developed for multivariate land cover mapping and the accuracy of the proposed method is evaluated in two procedures of independent and dependent of the soft classification error. Likewise, the impact of some parameters (e.g. zoom factor, neighborhood level and weighting function) is investigated on the efficiency of the algorithm. According to the results, the overall accuracy of the PS technique is extremely dependent on the accuracy of its input data (outputs of the soft classification). Furthermore, as a key result of this chapter, it is indicated that by increasing the zoom factor, the overall accuracy of the algorithm decreases. Also, the second level of neighborhood and inverse/square inverse distance functions has demonstrated the highest accuracies. Considering lower values than 5 for zoom factor, overall accuracy of the algorithm is determined higher than 90 % in procedure of optimizing the sub-pixels spatial arrangement
Hierarchical Representations of Freebase Topics
No full textThe dataset contains more than 21M hierarchical relationships about ≈10M topics extracted from Freebase knowledgebase. The topics span the various categories of Freebase including Science & Technology, Arts & Entertainment, Sports, Society, Products & Services, Transportation, Time & Space, Special Interests, and Commons. The relationships describe the hierarchies of topics in terms of Types, Domains, and Categories. For example, ‘Albert Einstein’ can be found as a topic that is a sub-class of ‘Person’, belonging to the ‘People’ domain and ‘Society’ category. Another entity named as ‘Albert Einstein’ can also be found as a sub-class of ‘Book’, belonging to the ‘Books’ domain and ‘Arts & Entertainment’ category. The dataset is published in JSON and CSV formats, sample files are provided to help explore how the dataset is structured. The dataset is believed to be useful for studying the inter-related connections among topics in different domains of knowledge. The first author may be contacted at ([email protected]) for more information. The following paper may kindly be cited in case of using the dataset. Mahmoud Elbattah, Mohamed Roushdy, Mostafa Aref, Abdel-Badeeh M. Salem. “Large-Scale Entity Clustering Using Graph-Based Structural Similarity within Knowledge Graphs”, Big Data Analytics: Tools, Technology for Effective Planning, CRC Press. https://www.researchgate.net/publication/321716589_Large-Scale_Entity_Clustering_Based_on_Structural_Similarity_within_Knowledge_Graph
Hierarchical Representations of Freebase Topics
No full textThe dataset contains more than 21M hierarchical relationships about ≈10M topics extracted from Freebase knowledgebase. The topics span the various categories of Freebase including Science & Technology, Arts & Entertainment, Sports, Society, Products & Services, Transportation, Time & Space, Special Interests, and Commons. The relationships describe the hierarchies of topics in terms of Types, Domains, and Categories. For example, ‘Albert Einstein’ can be found as a topic that is a sub-class of ‘Person’, belonging to the ‘People’ domain and ‘Society’ category. Another entity named as ‘Albert Einstein’ can also be found as a sub-class of ‘Book’, belonging to the ‘Books’ domain and ‘Arts & Entertainment’ category. The dataset is published in JSON and CSV formats, sample files are provided to help explore how the dataset is structured. The dataset is believed to be useful for studying the inter-related connections among topics in different domains of knowledge. The first author may be contacted at ([email protected]) for more information. The following paper may kindly be cited in case of using the dataset. Mahmoud Elbattah, Mohamed Roushdy, Mostafa Aref, Abdel-Badeeh M. Salem. “Large-Scale Entity Clustering Using Graph-Based Structural Similarity within Knowledge Graphs”, Big Data Analytics: Tools, Technology for Effective Planning, CRC Press. https://www.researchgate.net/publication/321716589_Large-Scale_Entity_Clustering_Based_on_Structural_Similarity_within_Knowledge_Graph
sj-tiff-1-ejo-10.1177_11206721221080821 - Supplemental material for Vector analysis of moderate to high myopic astigmatism after small-incision lenticule extraction (SMILE): 12-month follow-up
No full textSupplemental material, sj-tiff-1-ejo-10.1177_11206721221080821 for Vector analysis of moderate to high myopic astigmatism after small-incision lenticule extraction (SMILE): 12-month follow-up by Mahmoud Jabbarvand, Mehdi Khodaparast, Zahra Moravvej, Kianoush Shahraki, Hanie Ahmadi, Kourosh Shahraki, Alireza Jamali and Foroozan Narooie-noori in European Journal of Ophthalmology</p
السينما العربية الناطقة بالفرنسية: حالة مهدي شرف / Arab Francophone Cinema: The Case of Mehdi Charef
No full text[In Arabic Francophone literature, the writer is capable of publishing in his/her native country or in France. In general, this literature tackles Arab issues but is written in French. In cinema, however, the case is different. According to the rules of cinema, the film is identified by the producing country. Therefore, films that are directed by Arabs and produced in France are French Films. This is especially true of films directed by Algerian, Tunisian and Morrocan immigrants. The most important characteristic in this type of cinema is the country to which the creator immigrated to. Most of the stories in these films are about the new country in which the director has lived. This representation of the new setting has appeared in several films. Rarely do these films have stories connected to the directors\u27 native countries. This article, focuses on the case of Mehdi Charef as an author, screenplay writer, and film director. His first film Thé au harem d\u27archimède (1985) is an adaptation of his novel Thé au harem d\u27Archi Ahmed (1983) which revolves around the life of Algerian migrants living in poor neighborhoods in Paris. The following film he directed, Miss Mona (1987), deals with gender issues and prostitution, in which one of the protagonists is an Arab, but his ethnicity is incidental in the development of the plot. The third film Charef directed, Au pays des Juliets (1991), is entirely related to French life and concerns. But as Mehdi Charef moved away from depicting the life of his community, interest in him has waned.
Development of MOF-Coated Electrostatic Mems Resonators for Gas and Chemical Sensing Applications
No full textA Master of Science thesis in Mechatronics Engineering by Mohamed Mahmoud Hemid entitled, “Development of MOF-Coated Electrostatic Mems Resonators for Gas and Chemical Sensing Applications”, submitted in April 2024. Thesis advisor is Dr. Mehdi Ghommem and thesis co-advisor is Dr. Rana Sabouni. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form).In this work, we investigate the potential use of electrostatic MEMS resonators for gas and chemical sensing. We study the characterization of two different MEMS devices for CO₂ detection and characterization of aqueous media. The CO₂ MEMS sensor, which will be referred to as the gas sensor, is coated with a metal organic framework (MOF), namely ZIF-8, which demonstrated high sensitivity and selectivity to CO₂ gas. Both resonant MEMS devices are electrically actuated via a fixed electrode while investigating their dynamic response near resonance. In the case of the gas sensor, the exposure to CO₂ result in an added mass to the vibrating microstructure due to the adsorption of CO₂ via the active layer of MOF. This results in changes in its motion characteristics which are exploited to detect the presence of CO₂ and evaluate its concentration. The MEMS chemical sensor is tested in different aqueous environments. The detection mechanism is based on the electrical resonance of the MEMS device. Still, the electrical resonance is influenced by the mechanical motion of the sensor and varies based on the liquid properties. Finite element models for the MEMS sensors were developed and verified against experimental data. These models were used to identify the mode shapes, their associated natural frequencies, and the pull-in voltage. We use the motion-induced current method to analyse the response of the MEMS sensors. This method relies on a transduction mechanism that converts the motion of the resonator to a current signal. The third harmonic of the current is directly related to the motion of the resonator. The experimental results demonstrated the capability of the proposed gas sensor to detect CO₂. Indeed, the electrical measurements captured the nonlinear features associated with the motions of the gas sensor when subjected to CO₂ with varying concentrations. We showed effective deployment of frequency and amplitude changes in peak output current as detectors for the presence of CO₂ and quantifiers of its concentration. Moreover, we showed evidence of the potential of the motion-induced current method to characterise different liquids by tracking the electrical resonance.College of EngineeringMultidisciplinary ProgramsMaster of Science in Mechatronics Engineering (MSMTR
sj-pdf-1-wso-10.1177_17474930211056228 - Supplemental material for Ghost infarct core following endovascular reperfusion: A risk for computed tomography perfusion misguided selection in stroke
No full textSupplemental material, sj-pdf-1-wso-10.1177_17474930211056228 for Ghost infarct core following endovascular reperfusion: A risk for computed tomography perfusion misguided selection in stroke by Gabriel M Rodrigues, Mahmoud H Mohammaden, Diogo C Haussen, Mehdi Bouslama, Krishnan Ravindran, Leonardo Pisani, Adam Prater, Michael R Frankel and Raul G Nogueira in International Journal of Stroke</p
sj-docx-1-ine-10.1177_15910199231176310 - Supplemental material for Optimization of collateral grading on computer tomography angiography
No full textSupplemental material, sj-docx-1-ine-10.1177_15910199231176310 for Optimization of collateral grading on computer tomography angiography by Leonardo Pisani, Diogo C Haussen, Mahmoud Mohammaden, Catarina Perry da Camara, Gabriel M Rodrigues, Mehdi Bouslama, Alhamza Al-Bayati, Ranliang Hu, Nicholas Bianchi, Nirav Ravindra Bhatt, Michael Frankel and Raul G Nogueira in Interventional Neuroradiology</p
Impacts of different arrangements and sizes of parking spaces on parking movements
No full textEgyetemi/MA/MS
The Effect of Electrospinning Parameters on Piezoelectric PVDF-TrFE Nanofibers: Experimental and Simulation Study
Get PDFPolyvinylidene fluoride and its copolymers can be used as active materials for energy harvesting and environmental sensing. Energy harvesting is one of the most recent research techniques for producing stable electrical energy from mechanical sources. Polyvinylidene fluoride–trifluoroethylene (PVDF-TrFE) is applicable for sensors and self-powered devices such as medical implants and wearable electronic devices. The preparation of electrospun P(VDF-TrFE) nanofibers is of great interest for the fabrication of sensors and self-powered devices, nanogenerators, and sensors. In this regard, it is necessary to investigate the effects of various parameters on the morphology and piezoelectric output voltage of such nanofibers. In this study, we have examined the effect of concentration and feed rate on the nanofiber diameter. It has been found that by increasing the concentration and feed rate of the polymer solution, the diameter of the nanofibers increases. The experimental results and the finite element method (FEM) simulation have also shown consistency; when the nanofiber diameter increases, the output voltage of the nanofibers decreases. This behavior can be related to the strain reduction in the deformed nanofibers
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