397 research outputs found
Artificial Intelligence (AI) Competency and Educational Needs: Results of an AI Survey of Members of the European Society of Pediatric Endoscopic Surgeons (ESPES)
No full textBackground: Advancements in artificial intelligence (AI) and machine learning (ML) are set to revolutionize healthcare, particularly in fields like endoscopic surgery that heavily rely on digital imaging. However, to effectively integrate these technologies and drive future innovations, pediatric surgeons need specialized AI/ML skills. This survey evaluated the current level of readiness and educational needs regarding AI/ML among members of the European Society of Pediatric Endoscopic Surgeons (ESPES). Methods: A structured survey was distributed via LimeSurvey to ESPES members via email before and during the 2024 Annual Conference. Responses were collected over four weeks with voluntary, anonymous participation. Quantitative data were analyzed using descriptive statistics. Results: A total of 125 responses were received. Two-thirds (65%) of respondents rated their AI/ML understanding as basic, with only 6% reporting advanced knowledge. Most respondents (86%) had no formal AI/ML training. Some respondents (31%) used AI/ML tools in their practice, mainly for diagnostic imaging, surgical planning, and predictive analytics; 42% of the respondents used these tools weekly. The majority (95%) expressed interest in further AI/ML training, preferring online courses, workshops, and hands-on sessions. Concerns about AI/ML in pediatric surgery were high (85%), especially regarding data bias (98%). Half of respondents (51%) expect AI/ML to play a significant role in advancing robotic surgery, oncology, and minimally invasive techniques. A strong majority (84%) felt that the ESPES should lead AI education in pediatric surgery. Conclusions: This survey presents the ESPES with a unique opportunity to develop a competency map of its membership’s AI/ML skills and develop targeted educational programs, thus positioning the society to take the lead in AI education and the advancement of AI solutions in pediatric endosurgery
Molecular Characterization of Fusarium Solani Degrades a Mixture of Low and High Molecular Weight Polycyclic Aromatic Hydrocarbons
No full textObjectives:This study evaluates the ability of a non-white rot fungus strain, HESHAM-1, to degrade a mixture of low (naphthalene and phenanthrene) and high (chrysene and benzo(a)pyrene) molecular weight polycyclic aromatic hydrocarbons (LMW and HMW PAHs).Methods:Strain HESHAM-1 was isolated from oil polluted soil by enrichment method using phenanthrene as the sole source of carbon and energy. The strain showed the ability to tolerate and degrade a mixture of both low and high molecular weight PAHs. In the presences of LMW-PAHs (naphthalene and phenanthrene) as co-substrate, chrysene and benzo(a)pyrene (HMW-PAHs) were, respectively degraded by the fungus strain HESHAM-1 which was confirmed by GC-MS analyses.Results:The degradation rate was found as 84.82% for naphthalene, 40.09% for phenanthrene, 57.84% for chrysene and 71.06% for benzo(a)pyrene at the end of 10 days. This is the first report describing the biodegradation of a mixture of four PAH compounds by non-white rot fungus strain HESHAM-1 isolated from Egyptian oil-polluted soil. The fungus strain HESHAM-1 was identified by morphological characteristics and molecular genetics technique based on PCR amplification and sequencing of the internal transcribed spacers (ITSs) of the rDNA region and intervening 5.8S rRNA gene. Blast result and phylogenetic analysis of gene sequencing suggested that strain HESHAM-1 was closely related toFusarium solaniwith 100% sequence identity.Conclusion:The present study clearly demonstrates that, strain HESHAM-1 could be used to remove the crude oil from the environment.</jats:sec
SAT0283 CLINICAL AND SEROLOGICAL FEATURES OF SYSTEMIC SCLEROSIS IN ITALIAN AND EGYPTIAN PATIENTS
No full textCorrection: Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa
No full textThe authors of the article ‘Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa’ [1] wish to acknowledge the contribution of Professor Hussein El Fishawy. Our guidelines drew on various sources, including the Egyptian Ministry of Health guidelines, portions of which were adapted and reproduced with permission from the Egyptian Ministry of Health. Two of the authors of those guidelines, Professors Elsayed and Zaki, are also coauthors of our paper. Professor El Fishawy was the third author of the Egyptian guidelines and we would like to acknowledge his contribution to our review through this source, especially with respect to the treatment algorithms for patients with kidney transplants and those with acute kidney injury. Reference1. Elsayed HM, Wadee S, Zaki MS, Were AJO, Ashuntantang GE, Bamgboye EL, et al. Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa. Afr J Nephrol. 2020; 23(1):109-126
Narratives and outcomes of the uprisings in Syria and Bahrain
No full textThe narratives deployed by the political elites and the opposition groups in Syria and Bahrain has undergone a process of evolution since the onset of the Arab Spring. The examination of the cases of Syria and Bahrain is useful from a methodological perspective, since it enables us to determining the nuances that come about from the manner in which the Arab Spring unfolded in the region. This dissertation attempts to unite a diverse range of elements to present a comprehensive analysis of the nature of revolutionary consciousness, the nature of Arab transnational collective action movements in an era of globalization, and the mechanisms governing the evolutions of protest rhetoric. This dissertation draws attention to the particular ways in which language and rhetoric are used on both sides of the struggle and the ways in which rhetoric changes in response to the expectation of an international audience.Ph.D.Includes bibliographical referencesby Hesham Abdulaziz A. Alamma
Heat Transfer Characteristics for Natural Convection through Inline and Staggered Horizontal Banks of Tubes
No full textAbstract: In the present study, heat transfer characteristics of natural convection of air through 7x7 horizontal bank of tubes of 1cm diameter are studied numerically using Ansys-Fluent CFD code. Both the inline and staggered arrangements are considered. The study is carried out under constant heat generation in the tubes. The study is carried out at different spaces between the tubes in both the horizontal (longitudinal) and vertical (transverse) directions. The results of thermal and flow fields are obtained for each case. The effect of the longitudinal and transverse distances, SL and ST respectively, between the tubes on heat transfer is obtained for both the cases of inline and staggered arrangements. The studied range of both SL and ST is 1.2 to 4 cm. The results show that the heat transfer rate increases and the temperature decreases as a result of increasing the distance between the tubes in both the longitudinal and transverse directions. The effect of the longitudinal distance between the tubes on heat transfer is more pronounced than the corresponding effect of the transverse distance. Staggered arrangement has better heat transfer characteristics than the inline arrangement. Two correlations relating Nusselt number with tube spacing, one for the inline arrangement and the other for the staggered, were derived from the present results. Ideal tube spacing for the studied range of SL and ST was determined for the two arrangements.
Keywords: Heat transfer, horizontal tube bank, inline and staggered.
Title: Heat Transfer Characteristics for Natural Convection through Inline and Staggered Horizontal Banks of Tubes
Author: Abdelfatah Abdelmaksoud, Hesham Elbakhshawangy
International Journal of Novel Research in Electrical and Mechanical Engineering
ISSN 2394-9678
Vol. 10, Issue 1, September 2022 - August 2023
Page No: 39-53
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 18-January-2023
DOI: https://doi.org/10.5281/zenodo.7547534
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Heat%20Transfer%20Characteristics-18012023-2.pdfInternational Journal of Novel Research in Electrical and Mechanical Engineering, ISSN 2394-9678, Novelty Journals, Website: www.noveltyjournals.co
The Way(S) of Horus in the Saite Period: Tell El-Kedwa and its Key Location Guarding Egypt's Northeastern Frontier
No full textThe “Way(s) of Horus” represented an active route and part of Egypt’s eastern frontier; it is known during the Old, Middle, and New Kingdoms, and continued to be maintained and controlled by Saite kings (Dynasty 26: 664-525 B.C.). Tell el-Kedwa formed part of a series of Saite fortresses guarding Egypt’s East frontier, and lies on the eastern edge of an ancient lagoon, guarding a northern access point to Egypt. In 2007, investigations at Kedwa uncovered a succession of two massive Saite forts, and constitute an important factor in clarifying Tell el-Kedwa’s role as a key control point for access to Egypt during the Late Period. Excavations have continued in 2008 along the south wall of the successive fortresses, and these results will be published in due course. However, the initial excavation results from 2007 have confirmed the role of this fortress as a significant Egyptian garrison defending Egypt’s eastern gateway.DOI:10.2458/azu_jaei_v07i1_hussei
High-speed optoelectronic links for datacenters
No full textOptoelectronic (O/E) links are necessary for inter/intra-datacenter communication. Driven by the need to support higher data throughput, breakthroughs in Silicon-photonics and innovative circuit techniques are needed to enable efficient, compact, and low-cost links across a wide range of interconnect lengths.
For short-reach applications, where energy efficiency is a major concern, microring resonator (MRR)-based transmitters (TXs) promise low cost and dense multiplexing to replace their vertical-cavity surface-emitting laser (VCSEL)-based counterparts. This thesis presents an analysis of MRR-based links from the perspective of optical devices, circuits, and link budget and compares them to VCSEL-based links.
On the receiver (RX) side, sensitivity enhancement is necessary to improve the link’s energy efficiency. Due to their multiplication gain, avalanche photodetectors (APDs) improve RX sensitivity. When implemented monolithically with the RX, they reduce cost and parasitics. An RX with noise-canceling active balun is presented. The RX works as part of the APD bias stabilization loop. The integrated O/E-RX achieves a measured sensitivity of -18.8dBm at 0.57pJ/b.
A high-sensitivity, high-speed, and low-power RX demands solutions to the gain-bandwidth-power trade-offs. Accordingly, a current-mode receiver that eliminates the noisy and power-hungry front-end is proposed. The proposed design converts the single-ended PD current into differential currents and resolves the data using a current-based sense amplifier.
For long-reach applications, where spectral efficiency is critical, coherent O/E links rely on advanced modulation and dual-polarization, leading to stringent link requirements. The TX requires high bandwidth (BW), linearity, swing, and reliability, while the RX requires minimizing noise and total harmonic distortion (THD) across gains and frequency.
A linear high-swing driver for Mach-Zehnder modulator is presented. The driver uses a voltage breakdown enhancement technique to ensure reliability, and resistor-based capacitor-splitting technique to enhance BW. It achieves 6Vppd, 3.6% THD, and >40GHz BW, enabling >0.5Tb/s/wavelength operation.
An auto-reconfigurable transimpedance amplifier satisfying the stringent noise-linearity conditions is presented. Operating on a single sense-voltage, it reduces base resistor noise, gain peaking, phase margin and fT degradation. Techniques such as collaborative offset and DC current cancellation are also described. The RX achieves a gain of 75.5dBOhm and an input-referred noise of 18.5pA/sqrt(Hz) at 42GHz BW, enabling >0.5Tb/s/wavelength operation.Applied Science, Faculty ofElectrical and Computer Engineering, Department ofGraduat
PHASE SYNCHRONIZING LARGE ANTENNA ARRAYS USING THE SPATIAL CORRELATION PROPERTIES OF RADAR CLUTTER (IMAGING)
No full textInterest has developed in using large, thinned, random or periodic antenna arrays in applications that require a very narrow beam such as high-accuracy tracking, direction finding, target counting or high resolution radar imaging. Since large structures are very likely to flex with time, the need arises for techniques for the real time self-calibration of the antenna system. In 1,2,3 , a bistatic radar imaging system is described, where adaptive retrodirective beamforming techniques focus the array upon a point source, following which the focused beam is moved in range and angle to a target area and scanned across the target. The need for a point source (e.g., a corner reflector or a beacon) for system calibration limits its use especially in uncontrolled environments. We present two techniques for self-calibrating such a system in the absence of a point source, capitalizing on the spatial correlation properties of radar clutter. We show that if the spatial autocorrelation function of the field (as measured by adjacent element pairs) is ensured to be real and positive in the neighborhood of the origin, both periodic and aperiodic arrays can be synchronized forming retrodirective beams pointing at the axis of symmetry of the radar transmitter, provided that the inter-element spacing does not exceed some limit (the order of the size of the transmitting aperture). If the spatial autocorrelation function is complex, we show that we can still synchronize a periodic array, although with a residual beam pointing error. Both computer simulations and actual airborne sea clutter data (collected by the Naval Research Laboratory) verify the theory and the practicality of the algorithms
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