M Homeida, A.A Defalla, M. W. Kardaman, T E Nash, Allyson M. Fenwick, Salwa Suliman, I Eltom, James L. Bennett,
Abstract Almost all mortality caused by Schistosoma mansoni is secondary to Symmers' periportal fibrosis of the liver which can now be diagnosed by ultrasonography. This study assessed the usefulness of ultrasonography in measuring the effect of chemotherapy on the prevalence of Symmers' periportal fibrosis in Sudanese villagers. The prevalence of Symmers' fibrosis in 318 randomly selected patients from two villages not receiving systemic antischistosomal chemotherapy was compared with that in 168 patients ...
Tópico(s): Parasitic infections in humans and animals
1988 - Elsevier BV | The Lancet
... PubMed Scopus (123) Google Scholar , 10 Smith D. Defalla B.A. Chadwick D.W. The misdiagnosis of ...
Tópico(s): Healthcare Decision-Making and Restraints
2007 - Elsevier BV | Epilepsy & Behavior
Bassam A. Tayeh, Marijana Hadzima-Nyarko, Magdy Youssef Riad, Radwa Defalla Abdel Hafez,
The reinforcement of ultra-high-performance concrete (UHPC) with fibers was investigated in this study. Concrete is the most widely used manmade construction material, and UHPC has remarkable mechanical properties. The mechanical properties of UHPC can be modified by a variety of curing procedures and the amount of cement used. This study aimed to examine the impact of fiber reinforcement, temperature, and exposure time on UHPC. Initially, the temperature for UHPC was changed from 300 °C to 500 °C ...
Tópico(s): Concrete and Cement Materials Research
2023 - Multidisciplinary Digital Publishing Institute | Buildings
Bassam A. Tayeh, Samir M. Ahmed, Radwa Defalla Abdel Hafez,
The addition of sugarcane pulp sand (SCPS) and paper grain sand (PGS) to concrete bricks was proven effective in this study. This research not only investigated the engineering of incorporating SCPS and PGS into concrete bricks to build lightweight bricks but also examined the possibility of substituting fine aggregates with agricultural and industrial wastes to safely dispose of or recycle wastes. Concrete bricks were subjected to multiple tests, such as scanning electron microscopy, to evaluate ...
Tópico(s): Concrete and Cement Materials Research
2022 - Elsevier BV | Case Studies in Construction Materials
Radwa Defalla Abdel Hafez, Bassam A. Tayeh, Khaled Abdelsamie,
Tópico(s): Innovations in Concrete and Construction Materials
2022 - Springer Science+Business Media | Environmental Science and Pollution Research
Radwa Defalla Abdel Hafez, Bassam A. Tayeh, Raghda Osama Abd- Al Ftah,
Green construction materials have emerged as viable options to cope with the sustainability challenges set by the global communities without compromising the technical merits. Agro-industrial wastes have been utilized as alternative components in manufacturing construction products. In this vein, burnt clay bricks (CBs) is one of the novel and viable waste disposal strategy. Therefore, the primary focus of this research is to examine the impacts of agro-industrial wastes, such as sludge waste (SW), ...
Tópico(s): Recycled Aggregate Concrete Performance
2022 - Elsevier BV | Case Studies in Construction Materials
Ibrahim Y. Hakeem, Raghda Osama Abd-Al Ftah, Bassam A. Tayeh, Radwa Defalla Abdel Hafez,
The increasing demand for natural sand has proportionally influenced the industry for alternatives that can perform better in construction. Hence, this study was conducted to investigate the eggshell potential as a fine aggregate replacer in a concrete mix due to its high calcium carbonate content. The experimental plan was developed by substituting sand by volume in sustainable concrete (SC) replacement with 5 %, 10 % and 15 % eggshells. Primary concrete features that were studied were slump, water absorption, ...
Tópico(s): Innovations in Concrete and Construction Materials
2023 - Elsevier BV | Case Studies in Construction Materials
Ruperto Enrique Olivera Villaseñor, Alejandro Rodríguez,
This work is based on the usage of two models in order to assess the potential risk in failures coming from clandestine taking in the different pipeline ne...
Tópico(s): Metal Forming Simulation Techniques
2007 - | Científica
Radwa Defalla Abdel Hafez, Marijana Hadzima-Nyarko, Samir M. Ahmed, Bassam A. Tayeh,
In this paper, initial experiments were carried out to determine the possibility of using chicken feathers instead of sand in mortar. After earlier research suggested that chicken feathers had a high durability and resilience to degradation, chicken feathers recovered from slaughterhouses were chosen due to the significant cross-linking and strong bonding within their structure. Compared to natural sand, chicken feather sand (CFS) works as an eco-friendly resource. In this study, the chicken feather ...
Tópico(s): Concrete and Cement Materials Research
2023 - Multidisciplinary Digital Publishing Institute | Buildings
Raghda Osama Abd-Al Ftah, Bassam A. Tayeh, Khaled Abdelsamie, Radwa Defalla Abdel Hafez,
So much study has been done and is currently being done on the possibilities of using natural fibres to increase the concrete strength, to lower the cost of production and to reduce the negative effects of concrete production on our environment. The structural behaviour of flexural-loaded reinforced concrete beams incorporated with different grades of concrete (normal, high, and ultra-high strength) and a constant percentage of luffa cylindrical fibre (0.75% of the volume) was studied. The experimental ...
Tópico(s): Structural Behavior of Reinforced Concrete
2022 - Elsevier BV | Case Studies in Construction Materials
Dominic Heaney, Josemir W. Sander,
... of attendees of an epilepsy clinic,3Smith D. Defalla B.A. Chadwick D.W. The misdiagnosis of ...
Tópico(s): Genomics and Rare Diseases
2007 - Elsevier BV | Seizure
David Chadwick, David F. Smith,
... expertise and the necessary investigational facilities.3Smith DF, Defalla BA, Chawick DW. The misdiagnosis of epilepsy and ...
Tópico(s): Neuroscience and Neuropharmacology Research
1998 - Elsevier BV | The Lancet
Radwa Defalla Abdel Hafez, Marijana Hadzima-Nyarko, Samir M. Ahmed, Bassam A. Tayeh,
Missing Citation [...]
Tópico(s): Geotechnical and construction materials studies
2024 - Multidisciplinary Digital Publishing Institute | Buildings
Radwa Defalla Abdel Hafez, Ali Shubbar, Mohammed Salah Nasr, Raghda Osama Abd-Al Ftah,
The utilization of natural fiber wastes could be an ideal way to tackle two problems. Firstly, this may be a solution to the issue of environmental challenges related to agricultural wastes. Secondly, it can potentially fix high-strength concrete's (HSC) issue of unexpected (sudden) collapse. This study looked at the results of using two different kinds of natural fiber waste in HSC. Seven HSC mixtures were manufactured; three included rice straw fibers (RSF), three contained palm leaf sheath fibers ( ...
Tópico(s): Innovations in Concrete and Construction Materials
2024 - | Sustainable Structures
Heather Angus‐Leppan, John Paul Leach,
... CASPubMedWeb of Science®Google Scholar 11 Smith D, Defalla BA, Chadwick DW. The misdiagnosis of epilepsy and ...
Tópico(s): Acute Ischemic Stroke Management
2009 - Wiley | European Journal of Neurology
José Antonio García‐Montes, Carlos Zabal Cerdeira, Juan Calderón‐Colmenero, Nilda Espinóla, Guillermo Fernández de la Reguera, Alfonso Buendía-Hernández,
... mujer de 38 anos de edad con signos defalla cardiaca en clase funcional IV (NYHA), condos comunicaciones ...
Tópico(s): Cardiovascular and Diving-Related Complications
2005 - Elsevier BV | Revista Portuguesa de Pneumologia
Julio A Aguilar, Carmen Summerson,
... cantidad. El pacientequien se encontraba hospitalizado para manejo defalla cardiaca, desarrolla muerte subita.Caso 2Femenino de 46 ...
Tópico(s): Cardiac tumors and thrombi
2004 - Elsevier BV | Archivos de cardiología de México
Ahmed M. Maglad, Yousif Jabbar Laft, Samadar S. Majeed, Radwa Defalla Abdel Hafez,
This study presents a methodology for investigating the effect of adding nano cement kiln dust (NCKD) and nano red brick dust (NRBD) on the mechanical properties of concrete bricks. Cement kiln dust and red brick dust were processed into nanomaterials and incorporated into concrete brick mixes as partial replacements for cement at varying percentages: 0%, 10%, 20% and 30%. The research evaluated the fresh and hardened properties of the brick mixes. The workability of the fresh mixes was assessed using ...
Tópico(s): Innovative concrete reinforcement materials
2024 - Elsevier BV | Case Studies in Construction Materials
Radwa Defalla Abdel Hafez, Bassam A. Tayeh, Raghda Osama Abd- Al Ftah,
Tópico(s): Recycling and utilization of industrial and municipal waste in materials production
2025 - Elsevier BV | Case Studies in Construction Materials
Radwa Defalla Abdel Hafez, Raghda Osama Abd-Al Ftah, Bassam Abdelsalam Abdelsalam, Ibrahim Saad Agwa,
Tópico(s): Innovative concrete reinforcement materials
2025 - | Sustainable Structures
Bassam A. Tayeh, Samir M. Ahmed, Radwa Defalla Abdel Hafez,
Tópico(s): Innovations in Concrete and Construction Materials
2025 - Elsevier BV | Case Studies in Construction Materials
Radwa Defalla Abdel Hafez, Samadar S. Majeed, Raghda Osama Abd- Al Ftah, Moustafa Abdulrahim Mohamedsalih,
Tópico(s): Advanced Energy Technologies and Civil Engineering Innovations
2024 - Elsevier BV | Journal of Building Engineering
Singarayar Britto, R. Mahendranath Chowdary, BASIL MAHMOD ALI DEFALLA, Prof. Monika Mittal,
This research delves into the complex dynamics of remittance flows between India and 31 pairs of countries through a unique zoological lens, offering a novel perspective on the migratory patterns and financial implications of these flows. With the increasing interconnectedness of the global economy, remittances have emerged as a vital component of international migration. This study employs a zoological analogy to better understand the behaviors and patterns of these financial transfers, akin to ...
Tópico(s): Migration and Labor Dynamics
2024 - | MIGRATION LETTERS
Ahmed M. Maglad, Yousif Jabbar Laft, Samacar S. Majeed, Radwa Defalla Abdel Hafez,
Tópico(s): Recycling and utilization of industrial and municipal waste in materials production
2024 - Elsevier BV | Case Studies in Construction Materials
Siva Prakash C. S., Aliya Sultana, Piyush Mehta, Heera S. Kumar, Basil Mahmod Ali Defalla, Prakash Divakaran, Vinay Raj R. Dean,
Purpose: This research explores the interplay between accountancy, finance, and management, aiming to achieve financial success through integrated approaches, enhancing strategic decision-making, resource allocation, and organizational sustainability. Theoretical Framework: This research integrates traditional accounting methodologies with modern management paradigms to explore the dynamic interplay between accountancy, finance, and management. Key theoretical perspectives include Agency Theory, ...
Tópico(s): Financial Reporting and Valuation Research
2024 - CENTRO UNIVERSITARIO FEI | Revista de Gestão Social e Ambiental
M Dharmananda, Basil Mahmod Ali Defalla, Neha Purohit, Shailendra Singh, Biju Joseph, T Mohanadasan, Monika Mittal, Pooja Vyas,
In the dynamic contemporary business landscape, the convergence of technology, finance, and management plays a pivotal role in organizational success. This research explores the multifaceted realm of strategic integration, emphasizing the intricate balance between these domains. The background sets the stage, elucidating the historical evolution and growing relevance of this integration. Various research methodologies, including case studies, surveys, interviews, and data analysis, are used to investigate ...
Tópico(s): Economic Development and Digital Transformation
2024 - | Journal of Infrastructure Policy and Development
Radwa Defalla Abdel Hafez, Raghda Osama Abd-Al Ftah, Khaled Abdelsamie,
Recycling has progressed recently, turning specific non-renewable resources into renewable ones. This has led to a considerable increase in research on using waste materials such as ceramic and nucleus date waste as alternative aggregate materials in buildings. They suggest using aggregate from nucleus dates rubbish and ceramic waste to reduce the amount of waste in the environment and address material shortages at building sites. This study was aimed at determining whether the incorporation of ...
Tópico(s): Innovations in Concrete and Construction Materials
2024 - | Sustainable Structures