Nahed Solouma

King Faisal University · Department of Biomedical Engineering

Normal vision is a precious gift to mankind. Any vision defect or degradation is actually an intimidating problem for individuals and societies. Therefore, researchers are continually working to find effective solutions for vision disorders. In some retinal diseases such as Age-related Macular Degeneration (AMD), visual aids are required to improve...

Lasers are demonstrating high impact in many medical and biological applications. They have different interaction mechanisms within tissues depending on operational parameters, particularly the wavelength. In addition, the optical properties of the examined tissue (i.e., absorption and sca ering properties) influence the efficacy of the applied las...

Wireless power transmission (WPT) is commonly used today in many important daily applications, such as electric vehicles, mobile phones, and implanted medical devices. The transmitter and receiver coils are essential elements in the WPT system, and the coupling coefficient between these coils plays an important role in increasing the power transfer...

High-throughput microarrays contain a huge number of genes. Determining the relationships between all these genes is a time-consuming computation. In this paper, the authors provide a parallel algorithm for finding the Pearson’s correlation coefficient between genes measured in the Affymetrix microarrays. The main idea in the proposed algorithm, Fo...

Clean energy is extremely important not only because of economic purposes but also for health considerations. The use of photovoltaic (PV) systems is growing, with the increased needs for electricity. This requires more attention to research of PV systems. In this study, a method to predict the expected lifetime based on the reliability of system p...

Accurate determination of the optical absorption and scattering properties of biological tissues is a vital issue in many clinical and biomedical applications. These properties assist in planning and monitoring therapeutic protocols in addition to understanding many diagnostic measurements. Diffuse optical diagnosis is a non-invasive technique to m...

In this work, experimental setups and software algorithms were written, and implemented on medical imaging modalities to illustrate the importance of using the computer generated holography to create holograms and spatial light modulators to reconstruct them.

Breast cancer is the most women killing disease worldwide which is easily treated in its early stages before symptoms appear. Therefore, early detection of breast tumor is very significant to reduce the breast cancer death rate. Since the limitations of breast diagnosis techniques, such as X-ray mammography, magnetic resonance imaging, breast ultra...

Optical imaging method provides safe and encouraging tool in many medical applications. In this editorial, principle operation, instrumentation, medical applications and advantages of diffuse optical imaging technique are presented and discussed.

Optical differentiation is a promising tool in biomedical diagnosis mainly because of its safety. The optical parameters' values of biological tissues differ according to the histopathology of the tissue and hence could be used for differentiation. The optical fluence rate distribution on tissue boundaries depends on the optical parameters. So, pro...

Optical parameters of biological tissues play an important role in tissue characterization, including the absorption and scattering coefficients and the anisotropy factor. These parameters are high wavelength dependent and give functional information of the tissue such as total haemoglobin content, tissue oxygenation and water fraction. However, es...

Imaging is a very important diagnostic modality in medicine and other applications. Optical imaging is of superior importance in medicine because of its safety and direct production of spatial images without the need of reconstruction techniques. Unfortunately, there are many problems associated with optical imaging such as the problem of aberratio...

diffuse optical imaging is a recent, safe, noninvasive, functional, and very promising medical imaging technique that employs near infrared light to characterize biological tissue. Absorption and scattering properties of biological tissues give very important information about physiological changes associated with vasculature, cellularity, and oxyg...

Diffuse optical imaging is a non-invasive functional imaging technique that employs near infrared light (600~900 nm) to probe biological tissues. In tissue, the propagation of light at these wavelengths after distances greater than a few scattering lengths becomes nearly isotropic and can be represented by photon diffusion. Detected diffuse reflect...

Age-related macular degeneration (AMD) and diabetic retinopathy are the major causes of blindness. In AMD, the photoreceptors of the macula are damaged and the patient loses the central vision. Diabetic retinopathy occurs when high small blood vessels known as neovasculature arise in the choroid behind the retina. Moreover, leakage of small amounts...

Age-related macular degeneration (AMD) and diabetic retinopathy are the major causes of blindness. In AMD, the photoreceptors of the macula are damaged and the patient loses the central vision. Diabetic retinopathy occurs when high small blood vessels known as neovasculature arise in the choroid behind the retina. Moreover, leakage of small amounts...

This Issue (DOI: 10.13140/RG.2.1.1860.0408) includes the following articles; P1111528389, A.S. Haider and U. Nasir and M. Mujtaba and M.D. Ahmed, "Controller Design for Magnetic Levitation System Using Diophantine Minimum Order Estimator Approach " P1111530390, Mahmoud. A. Abo shady and Moataza.A.Hindiand Hamdy.A.Shatla and Ragab Elsagher, "SCADA b...

This Issue includes the following articles; P1111528389, A.S. Haider and U. Nasir and M. Mujtaba and M.D. Ahmed, "Controller Design for Magnetic Levitation System Using Diophantine Minimum Order Estimator Approach " P1111530390, Mahmoud. A. Abo shady and Moataza.A.Hindiand Hamdy.A.Shatla and Ragab Elsagher, "SCADA based Control of Gas Plant Inlet P...

Blindness is an intimidating problem in worldwide. Diabetic retinopathy and Age-related Macular Degeneration (AMD) are two major causes of blindness. These disorders could be managed by laser photocoagulation to stop the progress of the disease and prevent blindness. The physician fixates the eye of the patient and sends a laser beam to photocoagul...

This work presents experimental investigation of turbulent partially premixed flames (PPF’s) stabilized within a concentric flow conical nozzle (CFCN) burner with a turbulence generator. The burner stability limit is investigated. In addition, the flow and temperature fields are measured above the conical nozzle exit using 2D PIV and fine wire ther...

Background: Retinitis pigmentosa (RP) is a clinically and genetically heterogeneous group of inherited retinal degenerations that is estimated to affect more than 1.5 million people worldwide. RP is characterized by retinal pigment deposits visible on fundus examination, abnormal electroretinogram and progressive retinal dysfunction. Aim: The prese...

The aim of this work is to electronically generate the diffraction patterns of medical images and then trying to optically reconstruct the corresponding holographs to be displayed in space. This method is proposed in a trial to find a smart alternative of the expensive and perishable recording plates.

The aim of this work is to electronically generate the diffraction patterns of medical images and then trying to optically reconstruct the corresponding holographs to be displayed in space. This method is proposed in a trial to find a smart alternative of the expensive and perishable recording plates.

Hard implants undergo detachment from the host tissues due to inadequate biocompatibility, poor adhesion and subsequent cell integration. Thereby, surface engineering seems to offer solutions for improved functionality and biocompatibility of material implants inside the biological environment. Polycaprolactone (PCL) thin film has been fabricated v...

Background Discovering new biomarkers has a great role in improving early diagnosis of Hepatocellular carcinoma (HCC). The experimental determination of biomarkers needs a lot of time and money. This motivates this work to use in-silico prediction of biomarkers to reduce the number of experiments required for detecting new ones. This is achieved by...

Exudates are one of the earliest and most prevalent symptoms of diseases leading to blindness such as diabetic retinopathy and macular degeneration. Certain areas of the retina with such conditions are to be photocoagulated by laser to stop the disease progress and prevent blindness. Outlining these areas is dependent on outlining the lesions and t...

Age-related macular degeneration and diabetic retinopathy are among major causes of blindness worldwide. Laser photocoagulation of certain positions in the affected retina is used to stop the progress of such disorders and prevent blindness. Unfortunately, the treatment procedure is done manually over many treatment sessions with about 50% failure...

Retinal disorders are among the most dangerous diseases because many of them may lead to blindness if not early diagnosed and managed. Medical screening is very important as it allows the early diagnosis of the disease. Only ophthalmologists who have enough experience can differentiate between normal and abnormal retinas at the early stages of the...

The key idea discussed in this paper is to infer gene regulatory network from high throughput microarray data for Hepatocellular Carcinoma (HCC). Working with such huge number of genes is a complex process. So, our framework for inferring gene interactions from large scale microarrays is based on a selected set of informative genes. We applied two...

The main idea to correct sight disorders using lasers is to modify corneal curvature by applying laser to specific layers of the cornea. Intrastromal photorefractive keratectomy (ISPRK) is a laser technique used to correct sight disorders by evaporating corneal tissue from the stroma. Evaporating such tissue produces small cavities that may coincid...

Understanding gene interactions in complex living systems can be seen as the ultimate goal of the systems biology revolution. Hence, to elucidate disease ontology fully and to reduce the cost of drug development, gene regulatory networks (GRNs) have to be constructed. During the last decade, many GRN inference algorithms based on genome-wide data h...

Protein function prediction is one of the most important problems in the field of proteomics since it leads to determining cell functions. Since proteome is divided into clusters, each cluster (group of proteins) should have common characteristics. One of these characteristics is to have the same functions. In this study we try to extract motifs fo...

Bioinformatics can be used to predict protein function, leading to an understanding of cellular activities, and equally-weighted protein-protein interactions (PPI) are normally used to predict such protein functions. The present study provides a weighting strategy for PPI to improve the prediction of protein functions. The weights are dependent on...

Age-related macular degeneration and diabetic retinopathy are among major causes of blindness worldwide. Laser photocoagulation of certain positions in the affected retina is used to stop the progress of such disorders and prevent blindness. Unfortunately, the treatment procedure is done manually over many treatment sessions with about 50% failure...

DNA microarray is a high throughput gene profiling technology employed in numerous biological and medical studies. These studies require complete and accurate gene expression values which are not always available in practice due to the so-called microarray missing value (MV) problem. Many attempts have been held to deal with this problem. MV imputa...

A new approach for segmenting different anatomical regions in dental Computed Tomography (CT) studies is presented in this paper. It is expected that the proposed approach will help automate different tissues regions by providing initial boundary points for deformable models or seed points for split and merge segmentation algorithms. Preliminary re...

In this paper, a new approach for computing different anatomical regions in dental Computed Tomography (CT) is presented. The approach consists of two steps. First, a HU threshold window sets to separate between different regions upon their gray-level values; second, a set of objects are generated and texture descriptors are calculated for selected...

Usually, the relations between the protein functions do not be considered in protein function/interaction prediction. In this paper, we propose a strategy for determining the relation between the protein functions. The technique is based on the overlapping number of proteins and interactions over protein clusters to determine the correlation betwee...

Many attempts have been carried out to deal with missing values (MV) in microarrays data representing gene expressions. This is a problematic issue as many data analysis techniques are not robust to missing data. Most of the MV imputation methods currently being used have been evaluated only in terms of the similarity between the original and imput...

Biomarker determination is a very important issue in medical research. Knowing the biomarker, better prognosis and diagnosis could be reached. Experimental prediction of biomarkers is lengthy and very costly. Recently, many studies have been conducted in the area of bioinformatics for In-silico prediction of biomarkers. This is assumed to save a lo...

J Jo ou ur rn na al l o of f R Ra ad di ia at ti io on n R Re es se ea ar rc ch h a an nd d A Ap pp pl li ie ed d S Sc ci ie en nc ce es s ABSTRACT Skin cancer is an intimidating disease which necessitates the presence of a non-invasive treatment. Laser-induced thermotherapy is one of the recent non-invasive modalities of superficial lesion treatme...

Exudates are one of the earliest and most prevalent symptoms of diseases leading to blindness such as diabetic retinopathy and wet macular degeneration. Certain areas of the retina with such conditions are to be photocoagulated by laser to stop the disease progress and prevent blindness. Outlining these areas is dependent on outlining the exudates,...

In this paper, numerical methods are used to build a three-dimensional (3D) model for human mandible with multi-objects from two-dimensional (2D) images captured by computed tomography (CT) scanner device. Three steps are used to evaluate realistic model; First step, segmentation techniques; are used to eliminate the undesired tissues, Second step,...

This paper presents an investigation on finite element modeling (FEM) for the human eardrum. FEM simulation was done in order to capture the mechanical noise variation effect on the human eardrum to control it in housing. The model was created using advanced finite element program ANSYS. In this model, different insulating architectural materials f...

The main idea to correct sight disorders using lasers is to modify corneal curvature by applying laser to specific layers of the cornea. Intrastromal photorefractive keratectomy is a laser technique used to correct sight disorders by evaporating corneal tissue, which results in small cavities that may coincide to form a larger cavity that will coll...

Many digital signal processing, techniques have been used to automatically distinguish protein coding regions (exons) from non-coding regions (introns) in DNA sequences. In this work, we have characterized these sequences according to their nonlinear dynamical features such as moment invariants, correlation dimension, and largest Lyapunov exponent...

Due to the ever growing amount of publications about protein-protein interactions, information extraction from text is increasingly recognized as one of crucial technologies in bioinformatics. This paper presents a Protein Interaction Extraction System using a Link Grammar Parser from biomedical abstracts (PIELG). PIELG uses linkage given by the Li...

his paper presents efficient comparison of segmented blood vessels and optic disc (OD), both of which are two prominent anatomical structures in retina, in both gray-scale and color retinal images. The blood vessel extraction is composed of four algorithms according to two criteria , i.e., Detection of the blood vessel boundaries ( using Difference...

Photodynamic therapy (PDT) is a new and promising modality in cancer treatment. Many studies have been conducted in the area of photodynamic therapy to improve its applicability. In this work, we tried to assess the validity of PDT in cancer treatment automatically instead of histopathologic assessment. Our proposed method is based on capturing a f...

Diagnosis and treatment of several disorders affecting the retina and the choroid behind it require capturing a sequence of fundus images using the fundus camera. These images are to be processed for better diagnosis and planning of treatment. Retinal image segmentation is greatly required to extract certain features that may help in diagnosis and...

We develop a computerized system for evaluation of alloimplant procedures in dentistry from x-ray images. The goal of this system is to help clinicians make more accurate evaluation of their surgical procedures as well as to guide them in selecting the most appropriate alloimplant material in an objective manner. A study was conducted whereby three...

We propose a computerized system to accurately point laser to the diseased areas within the retina based on predetermined treatment planning. The proposed system consists of a fundus camera using red-free illumination mode interfaced to a computer that allows real-time capturing of video input. The first image acquired is used as the reference imag...

We propose a new computerized system to accurately guide laser shots to the diseased areas within the retina based on predetermined treatment planning. The proposed system consists of a fundus camera interfaced to a computer that allows real-time capturing and processing of a sequence of images at video frame rates. The first image in the sequence...

Protein functions and their relations are powerful tasks in the field of proteomics since it can lead to knowing cell functions and activities. The relations between the proteins functions do not be considered into protein function/interaction prediction; although they have critical rule in improvement the accuracy of protein functions. In this pap...

Accurate registration, mosaicing and montage are essential for a physician employing laser photocoagulation in the treatment of diabetic choroidal neovascularization. In this paper, we introduce a 3-D based motion and structure recovery, compared to previous 2-D approaches. We detect the motion of the retina and recover its 3-D structure from vascu...

Examining the ECG signal carefully may lead to an accurate diagnosing for the heart abnormalities. Several techniques have been conducted in the area of arrhythmia detection using classical methods of classification. In the last two decades, there has been an increasing interest in applying techniques from the domains of nonlinear analysis and chao...