Tarek D. Elsarnagawy

• Professor, Former Director of Valley of Science & Technology, Executive President Counselor of Research, Development & External Affairs at Zewail City for Sci. & Technology
• Managing Director at Zewail City for Science and Technology

CV

Herein, a commercially self-curing PMMA was chosen as starting material and it was then mixed with different weight percentages (0 to 3 wt%) of nano-TiO2. The composite was prepared in a form of a thin disc specimen with 5 cm diameter and 1 mm average thickness and then characterized for elemental, functional and surface properties. The mechanical...

In the present study, 2D micro- and nanofibrous polycaprolactone (PCL) scaffolds were fabricated using the electrospinning technique. The thermal, microstructure and mechanical properties of the fabricated micro- and nanofibrous scaffolds were assessed using structural/phase, elemental, morphological characterizations and micro-universal testing ma...

Electrospinning technique was used for the fabrication of Polycaprolactone (PCL) nanofibrous scaffolds as 2D biodegradable polymer for soft and hard tissue replacement. Nanofiber's morphology, porosity, phase identification as well as thermal and biological properties were assessed using standard techniques. Bone marrow mesenchymal stem cells (BMSC...

In the present study, Poly(D,L-lactide-co-glycolide) (PLGA) nanofibrous scaffolds were synthesized by electrospinning for soft tissue replacement at a voltage of 20 kV and polymer solution feed rate of 1 mL/h. These were characterized using various morphological, elemental and other analytical techniques. The SEM results indicated that the as-spun...

In this article a wearable belt that simultaneously measures the rates of the heartbeat and respiration using an into textile embedded single fiber Bragg grating (FBG) sensor is presented and realized. A miniature interrogator FBGT-600 from Redondo-USA has been used for the measurements. The measured signal has been processed and both the heartbeat...

In this article a wearable belt that simultaneously measures the rates of the heartbeat and respiration using an into textile embedded single fiber Bragg grating (FBG) sensor is presented and realized. A miniature interrogator FBGT-600 from Redondo-USA has been used for the measurements. The measured signal has been processed and both the heartbeat...

In this article a wearable system that simultaneously measures the rates of the heartbeat (HBR) and respiration using fiber Bragg grating (FBG) sensor embedded into a textile is presented. The measured data is validated by comparing the recorded data by the FBG sensor with that of a commercial electrocardiogram ECG. The recorded data by the wearabl...

A device based study is carried out using an embedded Fiber Bragg Grating (FBG) strain sensor to simultaneously measure vital signal such as respiration, heartbeat and body motion in the form of a smart costume. The experimental results are modeled and simulated using a specially designed algorithm. The designed system consisted of FBG strain senso...

In this article a portable and wearable wireless system to measure the respiratory rate and signal using embedded fiber Bragg grating (FBG) based optical sensor into textile (nylon) is realized. The measured data is analyzed and compared with the output data of a commercial wired piezoelectric crystal film respiratory belt from Grass Technology (FB...

In the present work, a series of 0, 1 and 7 wt% silver nano-particles (Ag NPs) incorporated poly lactic-co-glycolic acid (PLGA) nano-fibers were synthesized by the electrospinning process. The PLGA/Ag nano-fibers sheets were characterized using SEM, TEM and DSC analyses. The three synthesized PLGA/silver nano-fiber composites were screened for anti...

"The intention of this paper is to be the first in a series to consider the complexity of Learning Centers as a nexus for learning in different organizational settings and the implications on development broadly conceived. Given each unique context, the series will delve into the following questions: How might Learning Centers best support the lear...

In this paper, aligned PLGA nanofibrous scaffolds were synthesized by electrospinning for tissue engineering. Morphological characterization showed highly aligned nanofibrous morphology with nearly uniform diameter less than 200 nm and porosity reaches to 73%. The FTIR results showed no changes in the FTIR spectra whether the material is in the bul...

The main objective of the present paper is to represent a new class of Poly Lactic-co-Glycolic Acid (PLGA) nanofibers containing silver (Ag) nanoparticles (NPs) by electrospinning process. Silver nanoparticles were well loaded without any chemical and structural modifications into PLGA polymer matrix to form an organic-inorganic nanocomposite. Synt...

While standard magnetoencephalographic systems record only one component of the biomagnetic field, novel vector-biomagnetometers enable measurement of all three components of the field at each sensing point. Because information content in standard one-component magnetoencephalography (MEG) is often not adequate to reconstruct quasi-radial dipolar a...

Observations indicate that different information is contained in electrocardiograms and magnetocardiograms in both patients and healthy volunteers. Closed loop currents could explain this phenomenon. We hypothesized that open loops, such as the spirally shaped currents in the heart, also contribute to these differences. We modeled two types of open...

The paper sets selected definitions of terms which are important to apply for the interactions of all participants in a cooperative and educational training program COOP. It describes details how the COOP program is developed to closely match the National qualifications Framework designed by the Saudi National Commission on Academic Accreditation a...

The paper sets selected definitions of terms which are important to apply for the interactions of all participants in a cooperative and educational training program COOP. It describes details how the COOP program is developed to closely match the National qualifications framework designed by the Saudi National Commission on Academic Accreditation a...

This study presents the experience of the Department of Applied Medical Sciences (AMS) - Riyadh Community College - King Saud University in its way to achieve the international accreditation standards to ensure quality. The study is based on a three years experience (2008-2010). The following will be clarified, the list of criteria adopted by AMS t...

Strain gauges are useful sensors in many engineering and medical applications. In case of using one gauge for measurement; quarter-bridge configurations, current flowing when power is delivered to the electrical strain gauge causes temperature rise; transient heat effect (THE); and consequently apparent strain appearing as drift of the zero baselin...

The aim of this study is to evaluate the ability of fibre optics in measuring nano-strains developed in dentistry due to small chewing force. Since long fibres were used before, therefore, short fibres were evaluated in this study. In this direction the results from three short fibres sensors (coated with adhesive, coated without adhesive, and unco...

This paper introduces an application of a single-mode optical fiber as a temperature sensor. The application is based on the Michelson-interferometer principle. A single mode optical fiber of several meters is loosely wound around a foam cylinder. The interferometric principle used in this work gives the advantage of having the output directly as a...

This study aims at comparing the technology of fibre optics to that of electrical strain gauges (ESG) when both are used in the field of dentistry. It compares the accuracy and sensitivity of the strain gauges versus that of optical fibres under the same loading conditions. Results showed that the accuracy of strain gauges is slightly better than t...

The paper reviews selected definitions of certain terms which are important to know for the interactions of all participants in a cooperative and educational training program. It describes details how the COOP program is developed to closely match the National Qualifications Framework designed by the Saudi National Commission on Academic Accreditat...

Emerging Technologies in Biomedical Engineering: A challenging fiber-optic temperature sensor “FOTS”

This paper introduces the application of a single-mode optical fiber as a temperature sensor. The application is based on a Michelson- Interferometer where the optical fiber represents the arms of the Michelson-Interferometer which are affected by the external stimulus to be measured. The sensor configuration is composed of a single-mode fiber of s...

Zusammenfassung Im Rahmen dieser Arbeit wird ein vollständig Monomode-Glasfaser-gekoppeltes (vor Ort elektronikfreies) Kraftmeß-/Wägesystem mit hoher Auflösung und Genauigkeit realisiert. Zwei konventionelle gecoatete Monomode-Glasfasern von mehreren Metern Länge sind auf den zylindrischen Teilen eines Stahl-Deformationskörper unter definierter Zug...

Sensors based on optical fibers use many principles to measure the required parameter. There are two basic types of fiber-optic sensors (FOS): Extrinsic- and Intrinsic- FOS. In this thesis an intrinsic FOS is designed to measure strain produced by a measurand. Alike the well known electrical strain gauges (ESG), a FOS is used to measure strain. The...