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

On Approximate Solutions of Second-Order Linear Partial Differential Equations (Articles)

Yousry S. Hanna

Applied Mathematics Vol.3 No.9, September 27, 2012

DOI: 10.4236/am.2012.39148 5,791 Downloads 9,375 Views Citations
Influence of Solar Cycle Variations on Solar Spectral Radiation (Articles)

Usama Ali Rahoma, Rabab Helal

Atmospheric and Climate Sciences Vol.3 No.1, January 30, 2013

DOI: 10.4236/acs.2013.31007 5,222 Downloads 9,093 Views Citations
Performance of Incoming Solar Radiation Components in Partial Annular Solar Eclipse on June 21^st, 2020 in Helwan, Egypt (Articles)

Samy A. Khalil, A. H. Hassan, U. Ali Rahoma, A. Abulwfa, Ashraf S. Khamees

Open Journal of Applied Sciences Vol.11 No.3, March 18, 2021

DOI: 10.4236/ojapps.2021.113022 704 Downloads 1,865 Views Citations
On the Infinite Products of Matrices (Articles)

Yousry S. Hanna, Samya F. Ragheb

Advances in Pure Mathematics Vol.2 No.5, September 26, 2012

DOI: 10.4236/apm.2012.25050 4,129 Downloads 8,053 Views Citations
Prominence Activity during the 2006 Total Solar Eclipse (Articles)

Beshir Marzouk

Natural Science Vol.10 No.4, April 4, 2018

DOI: 10.4236/ns.2018.104014 1,302 Downloads 3,073 Views Citations
Dynamics of Satellite Formation Utilizing the Perturbed Restricted Three-Body Problem (Articles)

Nabawia S. Khalifa

Journal of Applied Mathematics and Physics Vol.10 No.1, January 27, 2022

DOI: 10.4236/jamp.2022.101016 315 Downloads 1,380 Views Citations
Swift XRT Analysis of Type II-P Supernova SN 2008ij (Articles)

SH. M. Shehata, Ahmed M. Fouad, R. M. Samir, A. A. Shaker

International Journal of Astronomy and Astrophysics Vol.14 No.3, September 10, 2024

DOI: 10.4236/ijaa.2024.143014 98 Downloads 531 Views Citations
Geophysical Evaluation for Evidence of Recharging the Pleistocene Aquifer at El-Nubariya Area, West Nile Delta, Egypt (Articles)

Ahmed Khalil, Khamis Mansour, Taha Rabeh, Alhussein Basheer, Mohamed Abdel Zaher, Kamal Ali

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

DOI: 10.4236/ijg.2014.53032 6,539 Downloads 9,475 Views Citations
Sea Water Intrusion Modeling in Rashid Area of Nile Delta (Egypt) via the Inversion of DC Resistivity Data (Articles)

E. Tarabees, G. El-Qady

American Journal of Climate Change Vol.5 No.2, June 6, 2016

DOI: 10.4236/ajcc.2016.52014 2,553 Downloads 4,373 Views Citations
The Effect of Sun Elevation on the Twilight Stages in Malaysia (Articles)

Yasser Abdel-Fattah Abdel-Hadi, Amir Hussein Hassan

International Journal of Astronomy and Astrophysics Vol.12 No.1, February 11, 2022

DOI: 10.4236/ijaa.2022.121002 343 Downloads 1,900 Views Citations
Evaluation of Nile Delta-Mediterranean Sea Conjunction Using GPS, Satellite-Based Gravity and Altimetry Datasets (Articles)

Basem Elsaka, Ali M. Radwan, Mohamed Rashwan

Journal of Geoscience and Environment Protection Vol.8 No.2, February 5, 2020

DOI: 10.4236/gep.2020.82003 715 Downloads 2,243 Views Citations
Three-dimensional seismic attenuation tomography of Egypt (Articles)

Elsayed Fergany, Mamdouh Abass, Carlos Vargas

Natural Science Vol.4 No.8A, August 14, 2012

DOI: 10.4236/ns.2012.428081 6,572 Downloads 10,798 Views Citations
This article belongs to the Special Issue on Earthquakes
Application of Geophysical Methods for Geotechnical Parameters Determination at New Borg El-Arab Industrial City, Egypt (Articles)

Alhussein A. Basheer, Abdelnasser M. Abdelmotaal, Hany S. Mesbah, Khamis K. Mansour

Current Urban Studies Vol.2 No.1, March 28, 2014

DOI: 10.4236/cus.2014.21003 5,725 Downloads 9,613 Views Citations
Analytical Solution for Formation Flying Problem near Equatorial-Circular Reference Orbit (Articles)

Shaheera A. Altalhi, Magdy Ibrahim El Saftawy

International Journal of Astronomy and Astrophysics Vol.9 No.3, August 30, 2019

DOI: 10.4236/ijaa.2019.93016 568 Downloads 1,413 Views Citations
Prediction of the Diffuse Solar Energy on Horizontal at Different Selected Locations (Articles)

Samy A. Khalil

Energy and Power Engineering Vol.14 No.11, November 9, 2022

DOI: 10.4236/epe.2022.1411034 277 Downloads 1,231 Views Citations
Integrated Geophysical Investigations to Detect the Shallow Subsurface Settings at New Sohag City, Egypt (Articles)

Hany Mesbah, Mohammed Shokry, Mamdouh Soliman, Magdy Atya

International Journal of Geosciences Vol.8 No.3, March 31, 2017

DOI: 10.4236/ijg.2017.83019 2,195 Downloads 4,362 Views Citations
Phase-Resolved UV Spectroscopy of V834 Cen and MR Ser in High and Intermediate States (Articles)

Magdy R. Sanad, Matthew Bobrowsky

International Journal of Astronomy and Astrophysics Vol.2 No.4, December 31, 2012

DOI: 10.4236/ijaa.2012.24028 3,474 Downloads 5,996 Views Citations
Recurrence of Space-Time Events (Articles)

Nasr Ahmed

Journal of Modern Physics Vol.6 No.13, October 19, 2015

DOI: 10.4236/jmp.2015.613182 4,886 Downloads 6,479 Views Citations
Archaeo-Geophysical Survey around Itay El-Baroud Area, Nile Delta, Egypt (Articles)

Hany Shaaban, Gad El-Qady, El-Said Al-Sayed, Ashraf Khozaym, Ahmed Al-Emam, Hosni Ghazala

Archaeological Discovery Vol.2 No.3, July 18, 2014

DOI: 10.4236/ad.2014.23006 4,201 Downloads 6,789 Views Citations
Appliance of Geophysical Methods to Detect the Ancient Remains at “Tell Defenneh” Area, Ismailia, Egypt (Articles)

Alhussein Adham Basheer, Ahmed El-Kotb Al-Imam, Abdelnasser Mohammed Abdelmotaal, Mostafa Sarhan Toni, Sayed Omar Elkhateeb

Archaeological Discovery Vol.2 No.3, July 23, 2014

DOI: 10.4236/ad.2014.23009 3,401 Downloads 5,343 Views Citations

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