Ibrahim M Selim

University of Sadat City · Computer Science

Linear programming is an important approach that is used to represent a large class of combinatorial optimization problems. The simplex algorithm is one of the algorithms for solving linear programming problems with exponential time complexity. Fortunately, this algorithm solves real-world problems with polynomial time complexity. In particular, a...

Classification of edge-on galaxies is important to astronomical studies due to our Milky Way galaxy being an edge-on galaxy. Edge-on galaxies pose a problem to classification due to their less overall brightness levels and smaller numbers of pixels. In the current work, a novel technique for the classification of edge-on galaxies has been developed...

Clues and traces of the universe's origin and its developmental process are deeply buried in galaxy shapes and formations. Automated galaxies classification from their images is complicated due to the faintness of the galaxy images, conflicting bright background stars, and image noise. For this purpose, the current work proposes a novel logically s...

Galaxies’ studies play an important role in the astronomic. Accurate classification of these galaxies enables scientists to understand the formation and evolution of the Universe. During the last decades, there have been several methods applied to classify the galaxy images. However, these methods encounter three big challenges. First, most existin...

The Virgo cluster of galaxies is of great importance to study the development of the universe due to its close distance from the earth as well as being the center of the local super cluster. The problem that faces Virgo cluster studies is that it shares the same right ascension (RA) and Declination (DEC) ranges with large number of background a...

The development of automated morphological classification schemes for galaxies is important to study the formation and subsequent evolution of galaxies in our universe. This paper proposed a new machine learning method for classifying three types of galaxies image (Hubble types) namely elliptical, lenticulars, and spirals. The proposed approach con...

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Galaxy classification has an important role in understanding the formation of galaxies and the evaluation of our universe. Most of the machine learning methods were used to improve galaxy image classification. However, these methods suffer from some limitations, such as getting stuck in local point and slow convergence. Therefore, an alternative me...

Abstract: This paper is an extended version of "Deep Galaxy: Classification of Galaxies based on Deep Convolutional Neural Networks". In this paper, a robust deep convolutional neural network architecture for galaxy morphology classification is presented. A galaxy can be classified based on its features into one of three categories (Elliptical, Spi...

When numerical simulations are used for determining the age and contribution of different stellar populations in the integrated colour of a galaxy some problems were encountered. In this paper, a modified flower pollination algorithm (MFPA) is proposed for determining the age and relative contribution of different stellar populations of galaxies. T...

When numerical simulations are used for determining the age and contribution of different stellar populations in the integrated colour of a galaxy some problems were encountered. In this paper, a modified flower pollination algorithm (MFPA) is proposed for determining the age and relative contribution of different stellar populations of galaxies. T...

This paper presents a new approach for the automatic detection of galaxy morphology from datasets based on an image-retrieval approach. Currently, there are several classification methods proposed to detect galaxy types within an image. However, in some situations, the aim is not only to determine the type of galaxy within the queried image, but al...

In this paper, a deep convolutional neural network architecture for galaxies classification is presented. The galaxy can be classified based on its features into main three categories Elliptical, Spiral, and Irregular. The proposed deep galaxies architecture consists of 8 layers, one main convolutional layer for features extraction with 96 filters,...

The development of automated morphological classification schemes can successfully distinguish between morphological types of galaxies and can be used for studies of the formation and subsequent evolution of galaxies in our universe. In this paper, we present a new automated machine supervised learning astronomical classification scheme based on th...

Forecasting the weather in future won the attention of many researchers in different countries around the world. In this work a robust hybrid technique was applied to forecast rainfall by combining Particle Swarm Optimization based Learning Automata (PSOLA) and Multi-Layer Perceptron (MLP) which is popular kind used in Feed Forward Neural Network (...

In the field of galaxies images, the relative coordinate positions of each star with respect to all the other stars are adapted. Therefore the membership of star cluster will be adapted by two basic criterions, one for geometric membership and other for physical (photometric) membership. So in this paper, we presented a new method for the determina...

In this work we present JHKs near-infrared photometric study for the poorly studied open star clusters Alessi 16, Chupina1, Juchert-Saloran1 and Patchick 78 based on 2MASS data. Astrometry and photometric parameters have been calculated using the Redial Density Profile (RDP) and Color Magnitude Diagrams (CMDs) fittings. Radius, distance, reddening,...

The intelligent classification techniques have been widely used in the medical field for accurate classification. The liver disease diagnoses is one of the most commonly tasks in medical diagnosis area. However liver disease in most cases does not cause any symptoms at earlier stage. Symptoms partly rely on the type and the degree of liver disease....

An overview of automated astronomical facilities (especially in Egypt) is presented. Control of motors speed used to open and close the dome and mirror shutters due to weather station data. The fuzzy logic control introduced as a new control system for the Kottamia astronomical dome's shutters and mirror's shutter due to weather station data. The r...

In modern astronomy with the advent of astronomical imaging technology developments and the increased capacity of digital storage, lead to the production of photographic atlases of data which need to be processed autonomously. Galaxies morphology is an important topic to understand questions concerning the evolution and formation of galaxies and th...

Variations of light curves for space objects are investigated. Optical observations and photometric measurements for small space debris on highly elliptical orbits (HEO) and geostationary orbits (GEO) are used to determine their orbital parameters. Light curves of small space debris with various area-to-mass ratios and orbital characteristics are d...

In the present study, we have used Deep CCD images of the extremely young open star cluster NGC 6611, up to a limiting magnitude of V∼22.86 mag in V, R and I passbands. The resulting color-magnitude V; (V–I) diagram as well as their radial density profiles has been determined. Using 2MASS data, we confirmed the consistency between the 2MASS photome...

The cuckoo search algorithm (CS) is a simple and effective global optimization algorithm. It has been applied to solve a wide range of real-world optimization problem. In this paper, an improved Cuckoo Search Algorithm (ICS) is presented for determining the age and relative contribution of different stellar populations in galaxies. The results indi...

- The Astronomical dome has two shutters with three DC motors, Speed control of DC Motor is vital in many applications. In this paper the DC motors of Astronomical Dome and mirror shutters have been controlled by fuzzy logic control based on online homogenous weather station data. Control of motors speed used to open and close the dome and mirror s...

The optical tube has adapter to be attached to the Vixen Atlux mount and CCD camera with filter wheel are compatible with the tube and fixed using system of Celestron and SBIG. The position of the CCD camera is directed to be compatible with direction of motion in α and d

Seismological studies indicate that almost all earthquakes occurrence are attributed to tectonic stresses. On the other hand, Earth tides represent the largest periodic stress variations within the Earth’s crust and deep layers. Although, the amplitude of the tidal stress is small compared to the tectonic stresses, tidal stress rate is comparable o...

CCD observations in UBVRI filter are used to study the surface photometry of the barred lenticular galaxy NGC 3384

In this paper we present astrophysical parameters of the very old open star cluster Berkeley 39 using 2MASS JHK data and observation of BV CCD photometry (V ~ 21.5 mag) in Johnson-Cousin filters. We have derived reddening, distance, metallicity and age etc. using two color diagrams in near-infrared and optical bands. We have found E B-V = 0.099 ± 0...

We present 776 truly physical galaxy pairs, 569 of them are close pairs and 208 false pairs from Karachentsev (1972) and Reduzzi & Rampazzo (1995) catalogues, which contains 1012 galaxy pairs. Also we carried out star formation activity through the far-infrared emission (FIR) in physical (truly) interacting galaxies in some galaxy pairs and compare...

In this paper, we are going to introduce the Kottamia Astronomical Observatory, KAO, to the astronomical community. The current status of the telescope together with the available instrumentations is described. An upgrade stage including a new optical system and a computer controlling of both the telescope and dome are achieved. The specifications...

Abstract. We present deep CCD photometry (V � 21 mag) in BVRI Johnson-Cousin filters supported with 2MASS JHK data set for the old open star cluster NGC 2266. The cluster’s parameters such as reddening, distance, metallicity and age, etc ..., are derived using two color diagrams in optical and near-infrared bands. These parameters are EB􀀀V = 0:196�...

New BVR light curves of the eclipsing binary system NSV 5904 have been constructed based on CCD observations obtained using 1.88-m telescope of Kottamia observatory during the phase of telescope testing and adjusting its optical quality on May, 2009. New times of minima and epoch have been determined from these light curves. Using the Binary Maker...

We inquire in to the physics of a self gravitating medium in quasi-static equilibrium, using the phenomenological approach of thermodynamics. Gravitational galaxy clustering is statistical and its origin is dynamical one. Hence the aspects of clustering must be understood in order to arrive at a proper appreciation of the subject of the formation a...

Ibrahim Selim

In this work we have used the Viril theorem to investigate the dynamical stability of Hickson compact groups of galaxies. The average luminous mass of the galaxies member is approximately 1.3 times 011 Modot and average total luminous mass of group is approximately 4.6 times 011 Modot. The virial theorem has used to estimate the virial mass. The av...

We present a study of the HI, CO and FIR emission properties of galaxies in dense groups and compare with those of the reference sample of extremely isolated galaxies defined in the AMIGA project. We have previously proposed an evolutionary scenario in which the amount of HI decreases with the secular evolutionary state of a group. A key question i...

The effect of galaxy interaction on star formation in dense environment through the far-infrared emission (FIR) of galaxies has been investigated using data of Hickson Compact Groups (HCGs). We have identified 470 galaxy pairs with proximity criterion cr 6 390, and 358 galaxy pairs with (rp) less than 100 Kpc and V 6 350 km/s. We identified 41 clos...

We introduce and describe the performance of the optical tube of Celestron C-14, Atlux-Vixen mount and SBIG St-8E CCD camera being used at Kottamia Observatory. We have installed all software and instrumentations. The Installation and operation procedures for the whole system are described. Concluding remarks and recommended provision to maximize t...

We present a new method for determining the age and relative contribution of different stellar populations in galaxies based on the genetic algorithm. We apply this method to the barred spiral galaxy NGC 3384, using CCD images in U, B, V, R and I bands. This analysis indicates that the galaxy NGC 3384 is mainly inhabited by old stellar population (...