305 research outputs found
AN ELECTRICAL IMPEDANCE TOMOGRAPHY SYSTEM FOR THYROID GLAND WITH A TINY ELECTRODE ARRAY
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AN ELECTRICAL IMPEDANCE TOMOGRAPHY
SYSTEM FOR THYROID GLAND WITH A TINY
ELECTRODE ARRAY
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International Journal of Biomedical Engineering and Science (IJBES)
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Paper URL: https://airccse.com/ijbes/papers/3316ijbes05.pdf
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AN ELECTRICAL IMPEDANCE TOMOGRAPHY
SYSTEM FOR THYROID GLAND WITH A TINY
ELECTRODE ARRAY
Authors:
Moustafa Ahmed1,Yara Mouhamed2,Nivan M. Fikry3, Hesham Ali Badawi3,Mohamed A. Bondok4 and Mona S. El-Neklawi4
1Faculty of Allied Medical Science, Pharos University in Alexandria, 2
Faculty ofMedicine, Alexandria University,3Medical Research Institute, Alexandria University,
Faculty of Applied Medical Science, October 6 University, Egyp
A framework for enabling high-end high performance computing resources as a service
No full textIn an era of data explosion and analysis, researchers across the globe are trying to convert massive quantities of complex data into useful knowledge using Computational and Data-Enabled Science and Engineering (CDS&E) applications. CDS&E applications are gaining traction as an important dimension of Science, Technology, Engineering, and Mathematics research. These applications require powerful processors with fast interconnects, extreme large scale, and elastic resources. While high-end High Performance Computing (HPC) resources provide the necessary requirements, the complexity of such systems has grown exponentially. Furthermore, due to their high cost, limited availability, and high demand, the queue wait times to run applications on these systems is in the order of months. All of the above challenges prevent their adoption as a mainstream solution. On the other hand, Cloud computing is emerging as a dominant computing paradigm that offers many advantages. Consequently, early adopters have looked into using Clouds to solve the HPC model challenges. Initially, CDS&E applications were run on commodity Clouds, but this was found to be appropriate only for certain classes of applications. Other approaches explored complementing HPC resources with Clouds but failed to address all challenges in the HPC environment. Cloud providers also tried to provide HPC as a Cloud using small HPC clusters connected to form a larger Cloud but were hindered by small scale and limited performance. These approaches fall short of providing the high performance necessary for CDS&E applications. In this document, we propose a new approach to achieve the notion of HPC as a Service. This approach targets existing high-end HPC resources and investigates how a Cloud abstraction can be applied to provide a simple interface and support real-world applications. In particular, the application of Clouds to supercomputers is discussed, tested, and validated on an IBM Blue Gene/P supercomputer. The proposed framework transforms Blue Gene/P into an elastic cloud by bridging multiple systems to create HPC federated Clouds, supporting dynamic provisioning and efficient utilization, and maximizing ease-of-use through an as a Service abstraction. In order to effectively illustrate the benefits of such a concept, the proposed framework is demonstrated using a real-world ensemble application.M.S.Includes bibliographical referencesby Moustafa AbdelBak
Representation in War Reporting: A Critical Discourse Analysis of Al-Jazeera and the BBC Web-based English News Coverage of the 2006 Israel-Hezbollah War.
No full textThe present study aims to explore web-based news reports by the BBC and Al-Jazeera relating to the reporting of the 2006 Israel-Hezbollah war, with a view to discovering any significant representation of the selected event. It is possible that the language of war reports reflects divergent attitudes and opinions which are shaped by the beliefs, values and ideologies of different news media. The present study will focus on the analysis of certain salient details of linguistic structure as related to the systems of transitivity, i.e. participant roles and associated process types, the logico-semantic system of expansion and projection, covering the logical relations between clauses, as well as cases of syntactic transformation. The system of transitivity, in particular, is an essential tool in the analysis of the representation of some aspects of reality such as the structure of events and their participants (cf. Fowler, 1991). By conducting a linguistic analysis of the selected news texts in the light of the socio-political and historical context of these texts and of the covered event, the present study presents findings concerning the ways different news outlets can offer varying representations of the same event by employing varying textual structures. Analysis of the corpora of Al-Jazeera and the BBC reveals contrasting representations in the two news outlets reporting on the 2006 war. The discerned similarities in the representation of the covered war could be said to reflect the news outlets' endeavours to adhere to journalistic values, the factual style of the genre of the hard news report and considerations of the targeted audience, which would leave limited potential for partial or biased coverage of events. The discerned differences highlight the ways in which varying political positions and ideologies can shape news reporting and the ways in which differences in ownership and source of revenue could potentially affect editorial freedom and the way journalists function
Effect of chain length on the photophysical properties of pyrene-based molecules substituted with extended chains
No full textThe important role played by organic conjugated compounds in the ?elds of electronics and optoelectronics has led to a vast ?eld of research concerned with synthesizing various complex structures where π-π stacking plays a vital role. Pyrene-based molecules are examples of compounds which allow ef?cient charge transfer through π-π molecular stacking. Photophysical studies of such compounds have shown similar behavior as that of pyrene, even though they bear two additional conjugated rings and four long alkyl chains. Chain length may have played an effective role in in?uencing the π-π molecular stacking of such molecules. In continuation of our earlier work(Moustafa, R. M.; Degheili, J. A.; Patra, D.; Kaafarani, B. R. J. Phys. Chem. A 2008, 113, 1235-1243), we hereby synthesize and investigate the role of the chain lengths on the photophysical aspects of 2,11-di-tert-butyl-6,7,15,16- tetrakis(alkoxy-alkythio)quinoxaline-[2′,3′:9,10]phenanthro[4, 5-ab-c]phenazine, TQPP-[t-Bu]2-[XR]4(X O, S; R C nH2n+1). Various photophysical parameters such as Stokes shift, ?uorescence lifetime, ?uorescence quantum yield, and radiative and nonradiative rate constants are evaluated for TQPP-[t-Bu]2-[OR] 4 and TQPP-[t-Bu]2-[SR]4 in tetrahydrofuran. The variation of the Stokes shift, ?uorescence quantum yield, and lifetime are also correlated with the number of carbons in the alkyl chain R for TQPP-[t-Bu]2-[OR]4 and TQPP-[t-Bu]2-[SR] 4. © 2009 American Chemical Society.Anthony JE, 2008, ANGEW CHEM INT EDIT, V47, P452, DOI 10.1002-anie.200604045; Boden N, 1999, J MATER CHEM, V9, P2081, DOI 10.1039-a903005k; Chen MC, 2008, J MATER CHEM, V18, P1029, DOI 10.1039-b715746k; Chen ZH, 2006, ORG LETT, V8, P273, DOI 10.1021-ol0526468; Katsuhara M, 2005, SYNTHETIC MET, V149, P219, DOI 10.1016-j.synthmet.2005.01.005; Kumar S, 2006, CHEM SOC REV, V35, P83, DOI 10.1039-b506619k; Lakowicz J. R., 1999, PRINCIPLES FLUORESCE; Mitzi DB, 2004, J MATER CHEM, V14, P2355, DOI 10.1039-b403482a; MOUSTAFA RM, J PHYS CHEM A UNPUB; Naraso, 2005, J AM CHEM SOC, V127, P10142, DOI 10.1021-ja051755e; Oukachmih M, 2005, SOL ENERG MAT SOL C, V85, P535, DOI 10.1016-j.solmat.2004.05.012; Palilis LC, 2003, ORG ELECTRON, V4, P113, DOI 10.1016-j.orgel.2003.08.006; Parker C.A., 1968, PHOTOLUMINESCENCE SO; Petritsch K, 1999, SYNTHETIC MET, V102, P1776, DOI 10.1016-S0379-6779(98)01035-2; Ponomarenko SA, 2003, ADV FUNCT MATER, V13, P591, DOI 10.1002-adfm.200304363; Subuddhi U, 2006, PHOTOCH PHOTOBIO SCI, V5, P459, DOI 10.1039-b600009f; Sun YG, 2007, ADV MATER, V19, P1897, DOI 10.1002-adma.200602223; van de Craats AM, 1999, ADV MATER, V11, P1469, DOI 10.1002-(SICI)1521-4095(199912)11:171469::AID-ADMA14693.0.CO;2-K; WARIS R, 1988, APPL SPECTROSC, V42, P1525, DOI 10.1366-000370288442980513131
Enhancing the adsorption of disinfection by-products onto activated carbon using TiO2 nanoparticles
No full textA dynamic programming algorithm for days-off scheduling with sequence dependent labor costs
No full textAbstract This paper presents a dynamic programming (DP) algorithm for solving a labor scheduling problem with several realistic days-off scheduling constraints and a cost structure that depends on the work sequence for each employee. The days-off scheduling constraints include the following: (1) each employee is assigned no more than three workdays per week, (2) each employee is assigned at least two consecutive off days per week, and (3) any work stretch cannot exceed four consecutive workdays. The sequencedependent cost structure assumes that the daily wage of each employee depends on two factors: (1) whether the given workday is weekend or a regular workday, and (2) the sequence of work patterns assigned in previous days. A DP algorithm suited to instances of moderate size is used to determine the optimum work assignments that minimize the total labor cost, while satisfying the work demand under the stated constraints
Some New Inequalities for the Gamma and Polygamma Functions
No full textIn this paper, we present some new symmetric bounds for the gamma and polygamma functions. For this goal, we present two functions involving gamma and polygamma functions and we investigate their complete monotonicity. Also, we investigate their completely monotonic degrees. This concept gives more accuracy in measuring the complete monotonicity property. These new bounds are better than some of the recently published results
Some New Bounds for Bateman’s G-Function in Terms of the Digamma Function
No full textIn this paper, we present some new symmetric bounds for Bateman’s G-function and its derivatives, in terms of the digamma and polygamma functions, which are better than some recent results
The Current State of Artificial Intelligence on Detecting Pulmonary Embolism via Computerised Tomography Pulmonary Angiogram: A Systematic Review.
No full textCopyright: © 2025 The Author(s).
https://creativecommons.org/licenses/by-nc/4.0/Pulmonary embolism (PE) is a life-threatening condition with significant diagnostic challenges due to high rates of missed or delayed detection. Computed tomography pulmonary angiography (CTPA) is the current standard for diagnosing PE, however, demand for imaging places strain on healthcare systems and increases error rates. This systematic review aims to assess the diagnostic accuracy and clinical applicability of artificial intelligence (AI)-based models for PE detection on CTPA, exploring their potential to enhance diagnostic reliability and efficiency across clinical settings. A systematic review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Excerpta Medica Database (EMBASE), Medical Literature Analysis and Retrieval System Online (MEDLINE), Cochrane, PubMed, and Google Scholar were searched for original articles from inception to September 2024. Articles were included if they reported successful AI integration, whether partial or full, alongside CTPA scans for PE detection in patients. The literature search identified 919 articles, with 745 remaining after duplicate removal. Following rigorous screening and appraisal aligned with inclusion and exclusion criteria, 12 studies were included in the final analysis. A total of three primary AI modalities emerged: convolutional neural networks (CNNs), segmentation models, and natural language processing (NLP), collectively used in the analysis of 341,112 radiographic images. CNNs were the most frequently applied modality in this review. Models such as AdaBoost and EmbNet have demonstrated high sensitivity, with EmbNet achieving 88-90.9% per scan and reducing false positives to 0.45 per scan. AI shows significant promise as a diagnostic tool for identifying PE on CTPA scans, particularly when combined with other forms of clinical data. However, challenges remain, including ensuring generalisability, addressing potential bias, and conducting rigorous external validation. Variability in study methodologies and the lack of standardised reporting of key metrics complicate comparisons. Future research must focus on refining models, improving peripheral emboli detection, and validating performance across diverse settings to realise AI's potential fully
Fame bias in editorial choice: Yes or No?
No full textRecently, Scientometrics has published a paper titled “Is there bias in editorial choice? Yes” (Moustafa 2015) in which some comments are given on our published paper in Nature titled “Is there fame bias in editorial choice?” (Mahian et al. 2015). Unfortunately, the author of above mentioned paper and many other readers might misunderstand the main aim of our correspondence. Here, we try to give some explanations to clarify the main goal of analysis presented in the paper
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