Export 2940 results:
Sort by: Author [ Title  (Desc)] Type Year
A [B] C D E F G H I J K L M N O P Q R S T U V W X Y Z   [Show ALL]
Atta, M. E. E. - D., D. K. Ibrahim, and M. Gilany, "Broken Bar Faults Detection under Induction Motor Starting Conditions Using the Optimized Stockwell Transform and Adaptive Time-Frequency Filter", IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. Article 3518110, 2021. Abstract

Most of the published research studies for detecting induction motor broken bar faults (BBFs) use a time–frequency (t − f ) decomposition tool to characterize the fault-related components. However, the identification and the assessment of these components in (t − f ) domain require skilled user or powerful pattern recognition technique. Moreover, a relatively long starting duration is necessary. This article introduces an automated scheme to detect BBFs and distinguish fault severity in induction motors under startup conditions regardless of the user experience and even under short starting duration and in a noisy environment. This scheme is based on the analysis of the starting current using optimized Stockwell transform (ST). An active set algorithm is applied to maximize the energy concentration of the left-side harmonic (LSH) component. Then, an adaptive time–frequency filter is applied to extract the LSH component from the (t − f ) domain, where the energy of the right part of LSH (RLSH) is utilized as an effective index for BBFs detection and for discriminating BBFs severity. Both real experimental data and simulation-based tests on 0.746- and 11-kW motors are used to extensively verify the performance of the proposed scheme. The achieved results have ensured that the proposed scheme can achieve a high accuracy with the minimum data and shortest acquisition time in comparison with some recent methods in the literature.

Atta, M. E. E. - D., D. K. Ibrahim, and M. Gilany, "Broken Bar Faults Detection under Induction Motor Starting Conditions Using the Optimized Stockwell Transform and Adaptive Time-Frequency Filter", IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-10, 2021.
Atta, M. E. E. - D., D. K. Ibrahim, and M. I. gilany, "Broken Bar Fault Detection and Diagnosis Techniques for Induction Motors and Drives: State of the Art", IEEE Access, vol. 10, pp. 88504 - 88526, 2022. AbstractWebsite

Motors are the higher energy-conversion devices that consume around 40% of the global electrical generated energy. Induction motors are the most popular motor type due to their reliability, robustness, and low cost. Therefore, both condition monitoring and fault diagnosis of induction motor faults have motivated considerable research efforts. In this paper, a comprehensive review of the recent techniques proposed in the literature for broken bar faults detection and diagnosis is presented. This paper mainly investigates the fault detection methods in line-fed and inverter-fed motors proposed after 2015 and published in most relevant journals and conferences. The introduced review has deeply discussed the main features of the reported methods and compared them in many different aspects. Finally, the study has highlighted the main issues and the gaps that require more attention from researchers in this field.

Cravener, T. L., W. B. Roush, and M. M. Mashaly, "Broiler production under varying population densities", Poultry science, vol. 71, issue 3: Poultry Science Association, pp. 427-433, 1992. Abstract
Abd-Elsamee, M. O., "Broiler performance as affected by crude protein, lysine and a probiotic.", Egypt. Poult. Sci., vol. 20, pp. 943-962, 2001. Abstract
Soliman, A. Z. M., A. A. Ghazalah, M. R. El-Abbady, and M. O. Abd-Elsamee, "Broiler performance as affected by crude protein , metabolizable energy and fat during hot summer season .", The 7th Conference of the Egyptian Society of Nutrition and Feeds: 19 – 21 October, 1999. El-Arish, Egypt, pp. 621-631, 1999. Abstract
Elsharnouby, T., and E. Parsons, "A Broader Concept of Relationships: Identifying New Forms of Consumer-provider Interactions in Egyptian Financial Services", Journal of Marketing Management, vol. Vol. 26, issue Nos 13-14, pp. 1367-1388, 2010.
Khairat, R., H. El-Karaksy, H. T. EL-Bassyouni, A. K. Saad, E. Rabie, K. Hamed, and N. A. Yassin, "Broadening the clinical spectrum of ALGS: an Egyptian cohort with five novel mutations in JAG1 gene", Egyptian Journal of Medical Human Genetics, vol. 23, no. 1: SpringerOpen, pp. 1–9, 2022. Abstract
ElMofty, M., M. Bosseila, H. M. Mashaly, H. Gawdat, and H. Makaly, "Broadband ultraviolet A vs. psoralen ultraviolet A in the treatment of vitiligo: a randomized controlled trial", Clinical and experimental dermatology, vol. 38, no. 8, pp. 830–835, 2013. AbstractWebsite


El-Mofty, M., W. Z. Mostafa, R. Yousef, M. R. E. Abdel Halim, M. El Hawary, H. Abdel Kader, S. Assaad, and B. B. Ghannam, "Broadband ultraviolet A in the treatment of psoriasis vulgaris: a randomized controlled trial", International journal of dermatology, 2014. Abstract
El‐Mofty, M., W. Z. Mostafa, R. Yousef…, and M. R. E. Abdel Halim, "Broadband ultraviolet A in the treatment of psoriasis vulgaris: a randomized controlled trial", InternationalJournal of Dermatology, vol. Volume 53, issue Issue 9, pp. 1157–1164, September 2014, 2014.
Khorshid, A. E., A. M. Darwish, I. A. Eshrah, H. A. H. Fahmy, and M. El-Hadidy, "Broadband High Efficiency Amplifier for a Cognitive Radio System", PIERS: PIER, pp. 421, 2013. Abstract
Mann, S. A., A. Mekawy, and A. Alù, "Broadband Field Localization, Density of States, and Nonlinearity Enhancement in Nonreciprocal and Topological Hotspots", Physical Review Applied, vol. 15, no. 3: APS, pp. 034064, 2021. Abstract
Allam, M. A., T. A. Ali, and N. A. D. I. A. H. RAFAT, Broadband dispersion compensation and high birefringence photonic crystal fiber for CWDM/DWDM networks, , vol. 56, issue 6, pp. 1023, 2024. AbstractWebsite

In this study, we propose a new design based on photonic crystal fibers (PCFs) for broadband dispersion compensation in telecommunication networks. The proposed design has a hexagonal structure arrangement of air-holes rings of different diameters between the silica core and the cladding. The PCF properties like effective area, nonlinearity, dispersion slope, confinement loss, and birefringence are reported and discussed. For the best performance we present three designs A, B and C. Simulation results show that the three designs cover the six-telecommunication optical bands O-, E-, S-, C-, L- and U- bands (wavelengths ranging from 1260 to 1675 nm). Design A achieves a large negative dispersion value of about − 1716 ps/( with relative dispersion slope equals to that of conventional single-mode optical fibers (SMFs) of about 0.0036 nm−1, which makes it very suitable for long-haul DWDM transmission systems. With a little modification in the core, designs B and C achieve much higher confinement ability and achieve a very large birefringence value for polarization mode dispersion and sensing applications. Design C is engineered to have exact opposite dispersion of SMF with zero dispersion at the wavelength 1310 nm, which makes it a promising design in CWDM transmission system. The numerical values have been investigated using the full vector finite element method.

El-Broullesy, S. M., R. El-Bashar, M. R. I. Ramadan, S. Aboul-Enein, A. Ibrahim, D. H. Wood, M. F. O. Hameed, and S. S. A. Obayya, "Broadband absorption of modified conical nanowires for photovoltaic applications", Optik, 2022, vol. 271, pp. 170245., 2022.
Bhuyan, D. J., M. A. Alsherbiny, M. N. Low, X. Zhou, K. Kaur, G. Li, and C. G. Li, Broad-spectrum pharmacological activity of Australian propolis and metabolomic-driven identification of marker metabolites of propolis samples from three continents, , vol. 12, issue 6: Royal Society of Chemistry, pp. 2498 - 2519, 2021. Abstract
Mehanny, S. S. F., "A Broad-Range Power-Law Form Scalar-Based Seismic Intensity Measure", Engineering Structures, vol. 31, issue 7, pp. 1354-1368, 2009.
Mofty, M. E., S. Ramadan, M. M. Fawzy, R. A. HEGAZY, and S. Sayed, "Broad band UVA: a possible reliable alternative to PUVA in the treatment of early-stage mycosis fungoides.", Photodermatology, photoimmunology & photomedicine, vol. 28, issue 5, pp. 274-7, 2012 Oct. Abstract

UVA1 phototherapy was found to induce marked improvement in skin lesions of patients with stages IA and IB mycosis fungoides (MF). Broad band UVA (BB-UVA) is composed of 80.1% UVA1, with similar mechanisms of action. Our aim was to evaluate the efficacy of BB-UVA in the treatment of early-stage MF. Thirty patients with early stage MF were included. They were divided into two equal groups receiving either BB-UVA at 20 J/cm2/ session or PUVA three times/week for 40 sessions. Clinical and histopathological evaluations were performed before and after therapy in addition to immunohistochemical measurement of CD4+ cells and Bcl-2. Patients were followed up for an average duration of 36 months. Comparable clinical and histopathological improvement was noted in MF patients in both groups. Clinical improvement graded 'Excellent' was achieved in 33% of patients in the BB-UVA versus 13.3% in the psoralen and UVA (PUVA) group. Long-term follow-up indicated superiority of BB-UVA over PUVA. BB-UVA group showed a more rapid clearance rate, shorter time to achieve complete clearance, a longer disease-free interval and lower relapse rate. The use of BB-UVA in the treatment of early-stage MF is comparable or even superior to PUVA regarding efficacy and remission periods.

Negm-eddin, D. M., Brirf History of Ancient Egypt, , Giza, 2014. d.mhsn_njm_ldyn.pdf
Galose, M. S., H. M. Elsaied, T. A. Macky, and P. H. Fouad, "Brinzolamide/timolol versus dorzolamide/timolol fixed combinations: A hospital-based, prospective, randomized study.", Indian journal of ophthalmology, vol. 64, issue 2, pp. 127-31, 2016 Feb. Abstract

PURPOSE: To compare the efficacy and tolerability of brinzolamide/timolol (BT) and dorzolamide/timolol (DT) fixed combinations on intraocular pressure (IOP) reduction.

METHODS: Patients with primary open angle glaucoma or normal tension glaucoma were randomized to receive either BT or DT. IOPs were measured at baseline, 2 weeks, and 1, 2, and 3 months. The primary outcome measures were the mean change in IOP from baseline at each visit. Secondary outcome measures included the tolerability of each fixed combination.

RESULTS: Seventy-three patients (73 eyes) were included; 37 eyes in BT group and 36 eyes in DT group. Baseline mean IOP were 24.14 ± 4.5 and 29.53 ± 6 mmHg for BT and DT, respectively (P < 0.001). Both BT and DT provided statistically significant mean IOP reductions from baseline values within each group at all study visits (P < 0.001). DT provided greater mean IOP reductions from baseline than BT at each visit which was statistically significant at 2 weeks (P = 0.037). Mean percentage of IOP reduction was 24.35% and 46.33% at 2 weeks (P < 0.001), and 24.65% and 47% at 3 months (P < 0.001) for BT and DT, respectively. Patients' tolerability appeared to be better for DT than for BT with complete ocular comfort without any ocular adverse effects in 31 patients (81.1%) in DT group and 11 patients (29.7%) in BT group (P < 0.001).

CONCLUSION: Both drops provide effective IOP reduction which was greater, and patients were more likely to achieve lower target pressures with DT than with BT.

Abdelhaey, S. A., ""Bringing the individual back in: Private entrepreneurs as actors in international relations – the case of Mark Zuckerberg"", Review of Economics and Political Science, vol. 4, issue 4, pp. pp. 304-320, 2019.
amer, W., N. S. Khalifa, and A. B. Hamed, "Brindging phenol-plasticity with genetic profile of the hydrophyte Ludwigia stolonifera (Guill. & Perr.) P.H. Raven: with reference to its expansion to new habitats.", Caryologia: International Journal of Cytosystematics and Cytogenetics. , vol. 3, pp. 1-13, 2017. ludwigia-carylogia_2017.pdf
Abdelbari, M. A., A. A. El-Gazar, A. A. Abdelbary, A. H. Elshafeey, and S. Mosallam, "Brij® integrated bilosomes for improving the transdermal delivery of niflumic acid for effective treatment of osteoarthritis: In vitro characterization, ex vivo permeability assessment, and in vivo study", International Journal of Pharmaceutics, vol. 640, 2023. AbstractWebsite

Bilosomes are innovative vesicular carriers containing bile salt with a non-ionic surfactant. Being highly flexible, bilosomes can squeeze themselves through the skin carrying the drug to the action site and improving its skin penetration. The objective of this research was to encapsulate niflumic acid (NA), a non-steroidal anti-inflammatory drug into Brij® integrated bilosomes (BIBs) for effective treatment of osteoarthritis through transdermal delivery. BIBs were formulated using 100 mg of Span 20 with different amounts of sodium cholate (NaC), sodium taurocholate (NaTC), or sodium glycocholate (NaGC) as bile salt, with the addition of 5 mg of Brij-93 or Brij-35. BIBs were prepared utilizing ethanol injection method with the application of (31 × 22) complete factorial design using Design-Expert® software. The optimal BIBs formulation determined was (B5) which contains 5 mg of NaTC used as bile salt and 5 mg of Brij-93. B5 exhibited entrapment efficiency% = 95.21 ± 0.00%, particle size = 373.05 ± 0.07 nm, polydispersity index = 0.27 ± 0.01, and zeta potential = –32.00 ± 0.00 mV. It also had a high elasticity with a spherical shape. B5 gel displayed a sustained release profile with a significantly 2.3 folds’ higher drug permeation percent across rat skin than that permeated from NA gel. Moreover, in vivo anti-osteoarthritic and histopathological studies assured the efficacy and safety of B5 gel and its superiority over NA gel. Generally, the outcomes confirmed the great efficacy of NA loaded BIBs for the topical treatment of osteoarthritis. © 2023 Elsevier B.V.