ALI IBRAHIM ALI MOHAMED - Academia.edu (original) (raw)

Papers by ALI IBRAHIM ALI MOHAMED

$Research paper thumbnail of One sacroiliac screw for posterior ring fixation in unstable pelvic fractures$

Acta Orthopaedica Belgica

Unstable pelvic injuries are considered uncommon and they are usually associated with high rate o... more Unstable pelvic injuries are considered uncommon and they are usually associated with high rate of morbidity and mortality. High energy blunt trauma and falling from height are usually the main mechanism of injury. It is a retrospective study that was performed in academic level I trauma center. From September 2015 to December 2019, a consecutive series of 26 patients (7 females), with average age of 32 years with unstable pelvic fracture were included in this study. All patients underwent reduction and percutaneous fixation with one sacroiliac screw posteriorly for each sacroiliac joint and anterior arch fixation of the pelvic ring with either platting or external fixator. The average duration of follow up was 36 months. Clinical results: at the final follow-up, all patients had complete radiological healing of the fractures. The subjective functional assessment yielded excellent for twenty-two patients, good for two patients and fair for two patients. Posterior arch fixation of th...

An efficient and environmentally Pumice as a new catalyst for designing of 3,4dihydropyrimidin-2(... more An efficient and environmentally Pumice as a new catalyst for designing of 3,4dihydropyrimidin-2(1H) ones / thiones via one-pot multi component condensation of aromatic aldehydes, urea/ thiourea and ethyl acetoacetate or acetyl acetone in excellent

Sensors

The Internet of Things (IoT) has disrupted the IT landscape drastically, and Long Range Wide Area... more The Internet of Things (IoT) has disrupted the IT landscape drastically, and Long Range Wide Area Network (LoRaWAN) is one specification that enables these IoT devices to have access to the Internet. Former security analyses have suggested that the gateways in LoRaWAN in their current state are susceptible to a wide variety of malicious attacks, which can be notoriously difficult to mitigate since gateways are seen as obedient relays by design. These attacks, if not addressed, can cause malfunctions and loss of efficiency in the network traffic. As a solution to this unique problem, this paper presents a novel certificate authentication technique that enhances the cyber security of gateways in the LoRaWAN network. The proposed technique considers a public key infrastructure (PKI) solution that considers a two-tier certificate authority (CA) setup, such as a root-CA and intermediate-CA. This solution is promising, as the simulation results validate that about 66.67% of the packets th...

Alexandria Engineering Journal

Egypt lies in a dry region of the world. The management of water resources in dry areas is necess... more Egypt lies in a dry region of the world. The management of water resources in dry areas is necessary to maintain the limited quantities of water available and to achieve an appropriate level of development, food security and stability. The current study aims to estimate the water footprint (WF) of Egyptian crops in the old and new lands inside and outside the Nile Valley and Delta. In addition, comparison of the WF of Egyptian crops with the global WF, and calculating the economics of the green and blue WF of Egyptian crops. Methodology of assessment was adopted from the water footprint assessment manual. Meteorological data during the study period were obtained from the weather station at Agricultural Research Center, and from Egyptian Meteorological Authority. Data of crop productivity were obtained from the Economic Affairs Sector-Ministry of Agriculture and Land Reclamation. The results showed that the contribution of green water to the total water footprint of Egyptian crops was small compared to blue water. Average total green plus blue water footprint (WF green+blue) of Egyptian crops was about 680 m 3 /ton. Egyptian crops recorded low WF values compared to the average global WF. In addition, average net return of the WF green+blue of Egyptian crops amounted to 10.25, 5.23 and 5.00 LE/m 3 for winter field crops and vegetables, summer field crops and vegetables, Nili and perennial crops, respectively.

Vaccines

Background: Vaccine hesitancy, as defined by the WHO, is the reluctance or refusal to vaccinate d... more Background: Vaccine hesitancy, as defined by the WHO, is the reluctance or refusal to vaccinate despite the availability of vaccines and is one of the ten threats to global health in 2019. Vaccine hesitancy remains a complex matter influenced by multiple factors, especially in sub-Saharan Africa. Methods: We conducted a cross-sectional study between November 2021 and January 2022 among the general adult public seeking care at six different healthcare facilities in Kenya. The survey, in English, consisted of questions based on demographics, knowledge, and attitudes, including hesitancy towards the COVID-19 vaccine. Results: Of the 3996 surveys collected, 55.1% were from private, 19.5% from faith-based and 25.3% from government facilities., Approximately 81.0% of all the participants reported it was important to get a vaccine to protect other people from COVID-19, 79.9% reported they would take a vaccine to protect against COVID-19, yet 40.5% reported being hesitant to take the vaccin...

ABSTRACT The co-existence of diabetes mellitus (DM) and sickle cell disease (SCD) is rare. This s... more ABSTRACT The co-existence of diabetes mellitus (DM) and sickle cell disease (SCD) is rare. This study aimed to explore whether SCD patients have the same DM prevalence as the general population in a country with a high prevalence of DM. This cross-sectional study included all SCD adult patients admitted to Salmaniya Medical Complex, Bahrain, between 2003 and 2010 (n = 2,204). A random sample (n = 520) was taken to establish the prevalence of DM. Laboratory records were examined to determine the presence of DM. There were 376 SCD patients with complete records; of these, 24 (6.4%) had DM. The age- and sex-standardised prevalence of DM was 8.3%. While the prevalence of DM in SCD patients in Bahrain was high, it was lower than expected in this population. SCD may have a protective effect towards DM development. However, the impact of these two conditions on vascular diseases suggest a need for screening and aggressive treatment in this population.

International Journal of Intelligent Engineering Informatics, 2021

Frontiers in Optics + Laser Science APS/DLS, 2019

Cancers, 2022

Oesophago–gastric adenocarcinoma remains a leading cause of cancer-related morbidity and mortalit... more Oesophago–gastric adenocarcinoma remains a leading cause of cancer-related morbidity and mortality worldwide. Although there has been an enormous progress in the multimodality management of resectable oesophago–gastric adenocarcinoma, most patients still develop a recurrent disease that eventually becomes resistant to systemic therapy. Currently, there is no global consensus on the optimal multimodality approach and there are variations in accepted standards of care, ranging from preoperative chemoradiation to perioperative chemotherapy and, more recently, adjuvant immune checkpoint inhibitors. Ongoing clinical trials are aimed to directly compare multimodal treatment options as well as the additional benefit of targeted therapies and immunotherapies. Furthermore, our understanding of the molecular and genetic features of oesophago–gastric cancer has improved significantly over the last decade and these data may help inform the best approach for the individual patient, utilising bio...

Imaging and Applied Optics Congress, 2020

Image propagation through turbulence is examined using Hufnagel-Valley model for different turbul... more Image propagation through turbulence is examined using Hufnagel-Valley model for different turbulent path distances. Performance is assessed via cross-correlation (CC) products for variable turbulence inner scale which is shown to have a significant impact on the recovery.

Atmosphere, 2021

Monitoring the impact of changes in land use/land cover (LULC) and land surface temperature (LST)... more Monitoring the impact of changes in land use/land cover (LULC) and land surface temperature (LST) is of great importance in environmental and urban studies. In this context, this study aimed to analyze the dynamics of LULC and its impact on the spatiotemporal variation of the LST in the two largest urban cities in Syria, Damascus, and Aleppo. To achieve this, LULC changes, normalized difference vegetation index (NDVI), and LST were calculated from multi-temporal Landsat data for the period 2010 to 2018. The study revealed significant changes in LULC, which were represented by a decrease in agricultural land and green areas and an increase in bare areas in both cities. In addition, built-up areas decreased in Aleppo and increased in Damascus during the study period. The temporal and spatial variation of the LST and its distribution pattern was closely related to the effect of changes in LULC as well as to land use conditions in each city. This effect was greater in Aleppo than in Dam...

A Master of Science thesis in Computer Engineering by Ali Mohamed Ali Mohamed entitled, "Ass... more A Master of Science thesis in Computer Engineering by Ali Mohamed Ali Mohamed entitled, "Assessment of Usability of Web-Based Applications' User Interfaces," submitted in May 2017. Thesis advisor is Dr. Tarik Ozkul. Soft and hard copy available.

Gezira Journal of Health Sciences, 2010

Background: Anaemia in children is a health problem particularly in developing countries, such as... more Background: Anaemia in children is a health problem particularly in developing countries, such as Kassala area, eastern Sudan. Methods: A total of 401 children from four primary schools in kassala were random simple stratified selected during a period of two months and prevalence of anaemia was estimated, clinically and by measuring haemoglobin concentration. Results: Clinical examination revealed anaemia in 373 of the students and haemoglobin estimations proved anaemia in 93% of the students enrolled in the study (Hb. less than 13.5 g/dl). Conclusion : The study showed high prevalence of anaemia among schoolchildren in the study area, so we recommend that more studies must be done in this area and the heath authorities may interfere by heath education and other interventional methods (e.g. provision of iron and folate).

Evaluation of Some Maize ( Zea mays L.) Genotypes for Growth, Grain Yield and Resistance to Stem ... more Evaluation of Some Maize ( Zea mays L.) Genotypes for Growth, Grain Yield and Resistance to Stem Borers. بوبحلا ةيجاتناو ومنلا تافصل ةيماشلا هرذلل ويثارولا سزطلا ضعب مييقت قاسلا تابقاثل ةمواقملاو . A Thesis Submitted In Partial Fulfillment of the Requirements for the Degree of M.Sc. in Agriculture (Agronomy) By Mohamed Ali Mohamed B.Sc. Sudan University of Science and TechnologyCollege of Agricultural Studies, Agronomy, 2013

Orthopedics, 2021

Complex acetabular fractures are due to high-energy trauma in most cases. The operative managemen... more Complex acetabular fractures are due to high-energy trauma in most cases. The operative management of these types of fractures is often difficult and technically challenging. Almost all of these types of fractures are treated through extensile approaches, and a variety of them have been described. Some of these approaches are associated with complications such as infection, heterotopic ossification, and increased blood loss in addition to increased operative time. This retrospective study was performed at an academic Level I trauma center. From January 2013 to March 2019, 21 patients with complex acetabular fractures were treated with open reduction and internal fixation through a single anterior modified Stoppa approach. The average operative time was 98.80 minutes (range, 60-180 minutes), the average follow-up time was 40 months (range, 24-72 months), and the average Harris Hip Score (HHS) was 87.85 (range, 75-100). At the latest follow-up, 12 (57.1%) patients had an excellent HHS, 8 (38.1%) patients had a good HHS, and 1 (4.8%) patient had a fair HHS. Complex acetabular fractures can be effectively managed by a modified Stoppa approach without the need for extensile or combined approaches. [Orthopedics. 2021;44(3):e353-e358.].

Land, 2021

In Syria, 76% of the forests are located in the Syrian coast region. This region is witnessing a ... more In Syria, 76% of the forests are located in the Syrian coast region. This region is witnessing a rapid depletion of forest cover during the conflict that broke out in mid-2011. To date, there have been no studies providing accurate, reliable, and comprehensive data on the qualitative and quantitative aspects of forest change dynamics and the underlying drivers behind this change. In this study, changes in the dynamics of forest cover and its density between 2010 and 2020 were detected and analyzed using multi-temporal Landsat images. This study also analyzed the relationship between changes in forest cover and selected physical and socio-demographic variables associated with the drivers of change. The results revealed that the study area witnessed a significant decrease in the total forest area (31,116.0 ha, 24.3%) accompanied by a considerable decrease in density, as the area of dense forests decreased by 11,778.0 ha (9.2%) between 2010 and 2020. The change in forest cover was driv...

Computational Intelligence and Neuroscience, 2021

Sensors, satellites, mobile devices, social media, e-commerce, and the Internet, among others, sa... more Sensors, satellites, mobile devices, social media, e-commerce, and the Internet, among others, saturate us with data. The Internet of Things, in particular, enables massive amounts of data to be generated more quickly. The Internet of Things is a term that describes the process of connecting computers, smart devices, and other data-generating equipment to a network and transmitting data. As a result, data is produced and updated on a regular basis to reflect changes in all areas and activities. As a consequence of this exponential growth of data, a new term and idea known as big data have been coined. Big data is required to illuminate the relationships between things, forecast future trends, and provide more information to decision-makers. The major problem at present, however, is how to effectively collect and evaluate massive amounts of diverse and complicated data. In some sectors or applications, machine learning models are the most frequently utilized methods for interpreting ...