National Research Institute of Astronomy and Geophysics, Helwan, Egypt - Articles

Confrontation between Quantized Periods of Some Extra-Solar Planetary Systems and Observations (Articles)

A. B. Morcos

International Journal of Astronomy and Astrophysics Vol.3 No.2A，June 19, 2013

DOI: 10.4236/ijaa.2013.32A005 6,064 Downloads 8,151 Views Citations
This article belongs to the Special Issue on The Sun-Earth, Star-Planet and Planet-Moon Connections
Analytical Third Order Solution for Coupling Effects of Earth Oblateness and Direct Solar Radiation Pressure on the Motion of Artificial Satellites (Articles)

Hadia Hassan Selim

International Journal of Astronomy and Astrophysics Vol.4 No.3，September 16, 2014

DOI: 10.4236/ijaa.2014.43049 3,431 Downloads 4,428 Views Citations
On the Accuracy Assessment of the Latest Releases of GOCE Satellite-Based Geopotential Models with EGM2008 and Terrestrial GPS/Levelling and Gravity Data over Egypt (Articles)

Mohamed El-Ashquer, Basem Elsaka, Gamal El-Fiky

International Journal of Geosciences Vol.7 No.11，November 29, 2016

DOI: 10.4236/ijg.2016.711097 2,490 Downloads 4,166 Views Citations
Tracing of the Avenue of the Ram-Headed Sphinxes Remains Using Geophysical Investigations, Luxor, Egypt (Articles)

Alhussein A. Basheer, Abdelnasser M. Abdel-motaal, Ahmed El-Kotb, Ayman I. Taha, Mohammed A. Abdalla

International Journal of Geosciences Vol.5 No.8，July 30, 2014

DOI: 10.4236/ijg.2014.58070 2,984 Downloads 3,817 Views Citations
Studies of Tectonic Motion from Helwan-Satellite Laser Ranging Station (Articles)

Gamal F. Attia

International Journal of Astronomy and Astrophysics Vol.4 No.4，December 5, 2014

DOI: 10.4236/ijaa.2014.44055 3,400 Downloads 4,373 Views Citations
Feasible Multiple Satellite Mission Scenarios Flying in a Constellation for Refinement of the Gravity Field Recovery (Articles)

Basem Elsaka

International Journal of Geosciences Vol.5 No.3，March 27, 2014

DOI: 10.4236/ijg.2014.53027 4,386 Downloads 6,152 Views Citations
MASW Survey with Fixed Receiver Geometry and CMP Cross-Correlation Technique for Data Processing: A Case Study of Wadi Fatima, Western Saudi Arabia (Articles)

Faisal Rehman, Sherif M. El-Hady, Muhammad Faisal, Hussein M. Harbi, Muhammad Fahad Ullah, Saifur Rehman, Muhammad Kashif

Open Journal of Geology Vol.8 No.5，May 10, 2018

DOI: 10.4236/ojg.2018.85027 1,167 Downloads 3,306 Views Citations
New Generating Sets of the First Order Lane-Emden Differential Equations in N-Dimensional Radially Symmetric Polytropes (Articles)

M. A. Sharaf, A. S. Saad

Applied Mathematics Vol.4 No.4，April 26, 2013

DOI: 10.4236/am.2013.44090 4,825 Downloads 6,669 Views Citations
Spectral Evolution of Hercules X-1 over Main High State from RXTE/PCA Observations (Articles)

Denis A. Leahy, Mohammed H. Abdallah

Journal of High Energy Physics, Gravitation and Cosmology Vol.8 No.4，August 31, 2022

DOI: 10.4236/jhepgc.2022.84061 142 Downloads 558 Views Citations
Optical and Infrared Photometric Study of Old Open Star Cluster Berkeley 39 (Articles)

A. Essam, I. M. Selim

International Journal of Astronomy and Astrophysics Vol.5 No.3，September 28, 2015

DOI: 10.4236/ijaa.2015.53022 5,036 Downloads 5,996 Views Citations
Anodic Coating Characteristics of Different Aluminum Alloys for Spacecraft Materials Applications (Articles)

Afaf M. Abd El-Hameed, Yehia A. Abdel-Aziz, Fatma S. El-Tokhy

Materials Sciences and Applications Vol.8 No.2，February 8, 2017

DOI: 10.4236/msa.2017.82013 4,032 Downloads 8,667 Views Citations
Sliding Mode Control of Chaotic Motion in Electrodynamic Tethered Satellite System in an Inclined Elliptical Plane (Articles)

Ahmad Yousof Ahmad Taha, Ahmed Magdy Abdelaziz, Abd El Hakeem Abd El Naby, Yehia A. Abdel-Aziz

Journal of Applied Mathematics and Physics Vol.13 No.5，May 26, 2025

DOI: 10.4236/jamp.2025.135098 24 Downloads 149 Views Citations
Spatio-Temporal Polar-Inclined Space Mission Architecture for a Refined Retrieve of the Earth’s Gravity Field (Articles)

Basem Elsaka

World Journal of Engineering and Technology Vol.7 No.4，November 26, 2019

DOI: 10.4236/wjet.2019.74047 533 Downloads 1,198 Views Citations
A Comprehensive Study of Solar Energy Components by Using Various Models on Horizontal and Inclined Surfaces for Different Climate Zones (Articles)

Samy A. Khalil

Energy and Power Engineering Vol.14 No.10，October 21, 2022

DOI: 10.4236/epe.2022.1410031 209 Downloads 1,088 Views Citations
Shallow Seismic Refraction, Two-Dimensional Electrical Resistivity Imaging, and Ground Penetrating Radar for Imaging the Ancient Monuments at the Western Shore of Old Luxor City, Egypt (Articles)

Elsayed I. Selim, Alhussein A. Basheer, Gad Elqady, Mahfooz A. Hafez

Archaeological Discovery Vol.2 No.2，April 9, 2014

DOI: 10.4236/ad.2014.22005 5,981 Downloads 10,698 Views Citations
Relevance of AEM and TEM to Detect the Groundwater Aquifer at Faiyum Oasis Area, Faiyum, Egypt (Articles)

A. A. Basheer, A. I. Taha, A. El-Kotb, F. A. Abdalla, S. O. Elkhateeb

International Journal of Geosciences Vol.5 No.6，May 16, 2014

DOI: 10.4236/ijg.2014.56056 4,531 Downloads 6,647 Views Citations
Site Effect Estimation Using Microtremor Measurements at New Luxor City Proposed Site, South Egypt* (Articles)

Abdelnasser Mohamed, Sayed Omer El khateeb, Wael Dosoky, Mahmoud A. Abbas

Journal of Geoscience and Environment Protection Vol.9 No.9，September 29, 2021

DOI: 10.4236/gep.2021.99008 472 Downloads 1,882 Views Citations
Towards a Semi-Kinematic Datum for Egypt (Articles)

Mostafa Rabah, Ahmed Shaker, Magda Farhan

Positioning Vol.6 No.3，July 24, 2015

DOI: 10.4236/pos.2015.63006 4,759 Downloads 5,875 Views Citations
Source Mechanisms of Recent Earthquakes in Southern Saudi Arabia: Detecting of New Seismic Sources (Articles)

Ahmed Hosny, Abdullah Mousa, Khaled Yousef, Lotfy Samy, Hamada Sadallah

International Journal of Geosciences Vol.14 No.10，October 19, 2023

DOI: 10.4236/ijg.2023.1410049 194 Downloads 1,151 Views Citations
Symbolic and Graphical Computations of a Class of Slightly Perturbed Equations (Articles)

Mohammed A. Sharaf, Abdel-naby S. Saad, Zainab A. Mominkhan

Applied Mathematics Vol.4 No.5，May 21, 2013

DOI: 10.4236/am.2013.45112 3,242 Downloads 4,908 Views Citations

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