Export 6540 results:
Sort by: Author [ Title  (Asc)] 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]
Salem, M., N. Tsurusaki, A. Eissa, and T. Osman, "{Detection of Slums from Very High-Resolution Satellite Images Using Machine Learning Algorithms: A Case Study of Fustat Area in Cairo, Egypt}", 6th International Exchange and Innovation Conference on Engineering & Sciences, Fukuoka, Japan, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, pp. 219–224, 2020. Abstract

Slums are a global urban challenge, particularly in big cities in most developing countries where they are growing faster than governments control. However, detection of slums is a big challenge for such countries due to fast growing there and difficulty of field survey. To address this challenge, this study uses a novel method to detect slums from very high-resolution (VHR) satellite images using machine learning algorithms and roads network derived from OpenStreetMap. This method has been applied to Fustat Area in the center of Cairo, Egypt where slums highly exist. The result of this study has detected eight slums with areas that ranged from 2.4 ha to 28.3 ha. The accuracy of the result has been verified by the kappa index which showed a high accuracy of 0.93. The results of this study are important for planners and decision makers to help them in developing such areas.

Kandeel, A., A. Abdelmaksoud, M. Kotb, and W. Omar, "{Does 18F-FDG PET/CT have an additive role in evaluation of childhood Langerhans Cell Histiocytosis?}", Journal of Nuclear Medicine, vol. 58, no. supplement 1, pp. 120, may, 2017. AbstractWebsite

120Objectives: To demonstrate the value of FDG PET/CT in evaluation of childhood patient with Langerhans cell histiocytosis (LCH) and its added value in clinical management including initial staging and assessment of treatment response.Methods: A prospective analysis of 30 patients (27 males and 8 females; age ranged from 2.7 months to 9 years with a mean of 2.7 ± 2.0 years) with histopathological proven LCH who were under treatment and/or regular follow up from September 2013 till November 2016. All patients received specific therapy for LCH in the form of chemotherapy {&}/or surgical resection according to the standard institutional protocol. The findings of the PET/CT were compared with skeletal survey and computed tomography (CT) findings within time interval less than 1 month. The choice of methods depended on tumor location. Analysis criteria included the following: any focal FDG uptake was considered abnormal when it was greater than that of hepatic uptake or in presence of an abnormal changes on CT with any degree of FDG uptake, FDG avid lymph nodes on PET/CT were interpreted as positive on PET/CT basis regardless of the size.Results: According to PET/CT result, 21 patients (70{%}) presented with multi-system disease (bone, LNs, liver, lungs, soft tissue and skin), 6 patients (20{%}) had unifocal lesions (five with bone and one lymph nodes) and 3 patients (10{%}) presented by multi-focal lesions (two with bone lesions and a single patient with nodal involvement). At the end of study 21 patients (70{%}) were disease free with no recurrence. Only nine patients (30{%}) had disease recurrence. Twenty three patient (76.7{%}) had low risk of mortality and only seven patients (23.3{%}) were of high risk state. At the end of study, 21 patients (70{%}) were disease free with no recurrence. Only nine patients (30{%}) had disease recurrence. No statistically significant association could be detected between disease recurrence with age, sex, presenting organ, disease extent, risk of mortality, SUVmax of leading lesion. Disease extent showed a border line significant association with risk of mortality (p 0.05).Conclusion: PET/CT is a useful tool to assess known LCH lesions and rule out the presence of other organ infiltration and to provide a reference basis of classification, staging, treatment plan, and evaluation of therapy effect. FDG PET/CT not only provides the characteristics of lesions in CT scan, but also the lesions activity by FDG uptake. 18F-FDG PET/CT should be incorporated in patient management to facilitate disease stratification and avoid un-necessary interventions. Research Support: none

Salem, M., N. Tsurusaki, P. Divigalpitiya, and T. Osman, "{Driving Factors of Urban Expansion in Peri-Urban Areas of Greater Cairo Region}", 23rd International Conference on Urban Planning, Regional Development and Information, no. April, Vienna, Austria, CORP–Compentence Center of Urban and Regional Planning, pp. 191–196, 2018. Abstract

1 ABSTRACT Since the early 1980s, the Greater Cairo Metropolitan Region (GCMR) has witnessed a rapid urban expansion that has been mainly concentrated in the peri-urban areas (PUAs). Most of this expansion was against urban planning laws and has presented a critical challenge to the urban environment. It has also led to spatial fragmentation and loss of enormous agriculture lands. This research analyses the urban expansion in the PUAs of the GCMR, during the period (2001-2017) using GIS and remote sensing. In addition to presenting a set of driving factors of this expansion, which were extracted from the literature review and previous studies. The results of this research show that the urban expansion rate during the mentioned period reached to 461 hectares per year. Moreover, the population growth and accessibility were the most significant driving factors in the PUA of the GCR.

Badawy, A. A., M. O. Alotaibi, A. M. Abdelaziz, M. S. Osman, A. M. A. Khalil, A. M. Saleh, A. E. Mohammed, and A. H. Hashem, "{Enhancement of seawater stress tolerance in barley by the endophytic fungus aspergillus ochraceus}", Metabolites, vol. 11, no. 7, 2021. AbstractWebsite
Manoto, S., A. El-Hussein, R. Malabi, L. Thobakgale, S. Ombinda-Lemboumba, Y. Attia, M. Kasem, and P. Mthunzi-Kufa, "{Immobilization of HIV GP41 antibodies on glass substrates for HIV biosensing}", Frontiers in Biological Detection: From Nanosensors to Systems XII, vol. 11258: International Society for Optics and Photonics, pp. 59 – 67, 2020. Abstract
Zrig, A., A. Saleh, F. Hamouda, M. K. Okla, W. H. Al-Qahtani, Y. A. Alwasel, A. Al-Hashimi, M. Y. Hegab, A. H. A. Hassan, and H. AbdElgawad, "{Impact of sprouting under potassium nitrate priming on nitrogen assimilation and bioactivity of three medicago species}", Plants, vol. 11, no. 1, 2022. Abstract

Edible sprouts are rich in flavonoids and other polyphenols, as well as proteins, minerals, and vitamins. Increasing sprout consumption necessitates improving their quality, palatability, and bioactivity. The purpose of this study was to test how KNO3 priming affects the sprouting process species on three Medicago species (Medicago indicus, Medicago interexta, and Medicago polymorpha) and their nutritional values. Targeted species of Medicago were primed with KNO3, and the levels of different primary and secondary metabolites were determined. KNO3 induced biomass accumulation in the sprouts of the three species, accompanied by an increased content of total mineral nutrients, pigments, vitamins, and essential amino acids. Besides, our results showed that KNO3 enhanced the activity of nitrate reductase (NR), glutamate dehydrogenase (GDH), and glutamine synthetase (GS) enzymes, which are involved in the nitrogen metabolism and GOGAT cycle, which, in turn, increase the nitrogen and protein production. KNO3 treatment improved the bioactive compound activities of Medicago sprouts by increasing total phenolic and flavonoid contents and enhancing the antioxidant and antidiabetic activities. Furthermore, species-specific responses toward KNO3 priming were noticeable, where Medicago interexta showed the highest antioxidant and antidiabetic activities, followed by Medicago polymorpha. Overall, this study sheds the light on the physiological and biochemical bases of growth, metabolism, and tissue quality improvement impact of KNO3 on Medicago sprouts.

Osman, T., P. Divigalpitiya, M. M. M. Osman, E. Kenawy, M. Salem, and O. Hamdy, "{Quantifying the Relationship between the Built Environment Attributes and Urban Sustainability Potentials for Housing Areas}", Buildings, vol. 6, no. 3: Multidisciplinary Digital Publishing Institute, pp. 39, sep, 2016. AbstractWebsite

The Greater Cairo Metropolitan Region (GCMR) in its seeking to sustainable development (SD) by the year of 2050 facing the serious challenge of around 65 percent of Cairenes live in unplanned settlements. In this respect, the authors examined the effect of urban characteristics of unplanned settlements on SD in the Egyptian context, focusing on the type of unplanned growth on agricultural land. The output of the analysis were fourfold. First of all, we provide a brief overview of previous research on the main types of unplanned settlements in GCMR and the sustainability definition according to the Egyptian context. Secondly, we had a discussion with the local government during our field survey in GCMR to determine the study samples, the main urban characteristics, and the sustainability evaluation criteria in the Egyptian context. Thirdly, through the comparative analysis and geographic information system (GIS), we examined how the character of urban development affected per capita four urban measures in a cross-section of two settlements, one represented the unplanned settlements and other as a comparative planned sample to determine the real gap. Finally, by using the evaluation matrix, the help and block items are estimated for each measure of urban characteristics, providing substantive evidence on how the four measures of urban characteristics have been affected by the urban sprawl.

Madany, M. M. Y., W. A. Obaid, W. Hozien, H. AbdElgawad, B. A. Hamed, and A. M. Saleh, "{Salicylic acid confers resistance against broomrape in tomato through modulation of C and N metabolism}", Plant Physiology and Biochemistry, vol. 147, no. September 2019: Elsevier, pp. 322–335, 2020. Abstract
Manoto, S. L., C. Mabena, R. Malabi, S. Ombinda-Lemboumba, A. El-Hussein, M. Kasem, M. Lugongolo, and P. Mthunzi-Kufa, "{Smartphone biosensing for point of care diagnostics}", Frontiers in Biological Detection: From Nanosensors to Systems XII, vol. 11258: International Society for Optics and Photonics, pp. 45 – 51, 2020. Abstract
{Guedri Mkaddem}, M., A. Zrig, M. {Ben Abdallah}, M. Romdhane, M. K. Okla, A. Al-Hashimi, Y. A. Alwase, M. Y. Hegab, M. M. Y. Madany, A. H. A. Hassan, et al., "{Variation of the Chemical Composition of Essential Oils and Total Phenols Content in Natural Populations of Marrubium vulgare L.}", Plants, vol. 11, no. 5, pp. 612, feb, 2022. AbstractWebsite

Marrubium vulgare is a valuable source of natural bioactive molecules with high preventive and therapeutic effectiveness. Therefore, this study aimed to study the chemical polymorphism of natural populations of M. vulgare in Tunisia by quantitative chemical markers and the estimation of divergence between populations. Phytochemical analyses of the eight natural populations of Tunisian Marrubium vulgare prospected in different bioclimatic stages, revealed 42 compounds of essential oils representing 96.08% to 100% of the total oil. Hydrocarbon sesquiterpenes were the main fraction of all the populations studied and $\beta$-bisabolene was the major compound (from 30.11% to 71.35% of the total oil). The phytochemical investigation of the M. vulgare plant indicated the presence of essential oil with significant percentages of phenolic compounds. A significant quantitative and qualitative variation in the essential oils is detected for both major and minor compounds. The principal components analysis (PCA) performed in the single and combined traits provides a good distinction among populations, not according to their geographical and/or bioclimatic origins. Moreover, the phytochemical analysis of the leaves showed that the Tunisian populations, i.e., the populations of Kasserine, Kef, and Beja, were very rich in phenolic compounds (from 20.8 to 44.65 mg GAE/g DW). Flavonoids compounds were also the main class of total polyphenols present in all the tested populations (from 8.91 to 37.48 mg RE/g DW). The quantitative genetic diversity estimated by the population's structure, based on PCA analysis, was an adaptation to the changes in the environmental conditions. Overall, our study indicated that natural populations of M. vulgare had different chemotypes of essential oils and they were rich in phenolic compounds, particularly flavonoids, which opens a new prospect for industrial use and differential exploitation of this species.

Haig, G., D. Wang, A. A. Othman, and J. Zhao, "The α7 Nicotinic Agonist ABT-126 in the Treatment of Cognitive Impairment Associated with Schizophrenia in Nonsmokers: Results from a Randomized Controlled Phase 2b Study.", Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, vol. 41, issue 12, pp. 2893-2902, 2016 Nov. AbstractWebsite

A double-blind, placebo-controlled, parallel-group, 24-week, multicenter trial was conducted to evaluate the efficacy and safety of 3 doses of ABT-126, an α7 nicotinic receptor agonist, for the treatment of cognitive impairment in nonsmoking subjects with schizophrenia. Clinically stable subjects were randomized in 2 stages: placebo, ABT-126 25 mg, 50 mg or 75 mg once daily (stage 1) and placebo or ABT-126 50 mg (stage 2). The primary analysis was the change from baseline to week 12 on the MATRICS Consensus Cognitive Battery (MCCB) neurocognitive composite score for ABT-126 50 mg vs placebo using a mixed-model for repeated-measures. A key secondary measure was the University of California Performance-based Assessment-Extended Range (UPSA-2ER). A total of 432 subjects were randomized and 80% (344/431) completed the study. No statistically significant differences were observed in either the change from baseline for the MCCB neurocognitive composite score (+2.66 [±0.54] for ABT-126 50 mg vs +2.46 [±0.56] for placebo at week 12; P>0.05) or the UPSA-2ER. A trend for improvement was seen at week 24 on the 16-item Negative Symptom Assessment Scale total score for ABT-126 50 mg (change from baseline -4.27±[0.58] vs -3.00±[0.60] for placebo; P=0.059). Other secondary analyses were generally consistent with the primary end point results. Adverse event rates were similar for ABT-126 and placebo. ABT-126 did not demonstrate a consistent effect on cognition in nonsmoking subjects with schizophrenia; however, a trend toward an effect was observed on negative symptoms. registration: NCT01655680.

Osman, D. S., "معالجة مفهوم الدولة المدنية في المواقع الإلكترونية الدينية علي الإنترنت", المجلة المصرية لبحوث الإعلام , vol. عدد خاص, issue عدد خاص , 2011. First Research.doc
Ashour, A. A., A. H. Moussa, M. S. Abou-Ali, M. S. El-Sayed, A. S. Obada, A. F. Ghaleb, and A. H. Azzam, معجم مصطلحات الرياضيات, , القاهرة, مجمع اللغة العربية بالقاهرة, 2019.
ElSaied, H. M. A., R. S. H. M. Allam, and M. H. Osman, "‘Wipe-out’ after subscleral trabeculectomy in advanced glaucoma patients", Delta Journal of Ophthalmology, vol. 18, pp. 94–98, 2017. deltajophthalmol18294-1254499_032904.pdf
Abdelrahman, A. M., H. M. A. ElSaied, R. S. H. M. Allam, and M. H. Osman, "‘Wipe-out’ after subscleral trabeculectomy in advanced glaucoma patients", Delta Journal of Ophthalmology, vol. 18, pp. 94–98, 2017.
Abdelrahman, A. M., H. M. A. ElSaied, R. S. H. M. Allam, and M. H. Osman, "‘Wipe-out’ after subscleral trabeculectomy in advanced glaucoma patients", Delta Journal of Ophthalmology, vol. 18, issue 2017, pp. 94–98, 2017.
Abdelrahman, A. M., H. M. A. ElSaied, R. S. H. M. Allam, and M. H. Osman, "‘Wipe-out’after subscleral trabeculectomy in advanced glaucoma patients", Delta Journal of Ophthalmology, vol. 18, issue 2, pp. 94-98, 2017.
Khairy, M., A. Mahmoud, M. H. Sayyouh, A. Osman, and A. Gomaa, "“ A Laboratory Study on the Effect of Stimulating Indigenous Bacteria on Surface and Interfacial Forces of Crude - Oil Brine System", . The Offshore Mediterranean Conference, , Ravenna, Italy, 1997.
Omran, M., O. Badary, A. Helal, H. Hafez, M. Moneer, and S. Shouman, "“A prospective pharmacokinetics study of Docetaxel in breast cancer patients in relation to cytochrome 3A4 activity”", 3rd Congress of the Mediterranean Multidisciplinary Oncology Forum, Athens - Greece, 24-26 Oct, 2013. abstract.docx
Mahmoud, A., O.Osman, A. Refaat, N. G. Madian, and W. Khalil, "“Biophysical Study of Collagen/Chitosan Blends”", American Scientific Publishers, Quantum Matter, vol. 5, pp. 1-5, 2016.
Mahmoud, A. A., O. Osman, Ahmed Refaat, MD, N. G. Madian, W. Khalil, and M. Ibrahim, "“Dielectric Spectroscopy Measurements on Collagen Blends”", Middle East Journal of Applied Sciences, vol. 5, issue 5, pp. 94-106, 2015.