Study of Principal Component Analysis (PCA) as Face Recognition Method
Journal Article

Face recognition is a biometric technique that can be used for a variety of purposes, such as national security, access control, identity fraud, banking, and finding missing children. Faces are highly dynamic and facial features are not always easily extracted, which can lead to discarding textural information like the smoothness of faces, a hairstyle that, might contain strong identity information. In addition, brightness, scale, and facial expressions play a significant role in the face-recognizing process. Therefore, face recognition is considered as a difficult problem. To figure out this problem effective methods using databases techniques are needed. This paper describes face recognition methods and their structure. Based on Wen Yi Zhao and Rama Chellappa work the face recognition methods are divided into three groups: a holistic approach, feature-based approach, and hybrid approach, where Principal Component Analysis PCA, a holistic approach method, is presented as a mathematical technique that can assist the process of face recognition. Also, the paper shows how the PCA is used to extract facial features by removing the principal components of the available multidimensional data.

Entisar Nassr Abdulati Abolkasim, (04-2022), Scientific Journal for the Faculty of Science- Sirte University: Scientific Journal for the Faculty of Science-Sirte University, 1 (2), 18-32

Study of Principal Component Analysis (PCA) as a face recognition method
Journal Article

Face recognition is a biometric technique that can be used for a variety of purposes, such as national security, access control, identity fraud, banking, and finding missing children. Faces are highly dynamic and facial features are not always easily extracted, which can lead to discarding textural information like the smoothness of faces, a hairstyle that, might contain strong identity information. In addition, brightness, scale, and facial expressions play a significant role in the face-recognizing process. Therefore, face recognition is considered as a difficult problem. To figure out this problem effective methods using databases techniques are needed. This paper describes face recognition methods and their structure. Based on Wen Yi Zhao and Rama Chellappa work the face recognition methods are divided into three groups: a holistic approach, feature-based approach, and hybrid approach, where Principal Component Analysis PCA, a holistic approach method, is presented as a mathematical technique that can assist the process of face recognition. Also, the paper shows how the PCA is used to extract facial features by removing the principal components of the available multidimensional data.

AR Shtewi, (04-2022), ليبيا /سرت: Scientific Journal for Faculty of Science-Sirte University, 2 (1), 28-32

التحديات التي تواجه الانتقال السريع من التعليم التقليدي إلى التعليم عن بُعد (دراسة تقييمية لأداء منصة جامعة غريان الالكترونية)
مقال في مؤتمر علمي

يعتمد التعليم التقليدي على مجموعة عناصر أساسية، أهمها على الإطلاق المنهج التعليمي، المحاضر و الطالب، إلا أن هذه العناصر الأساسية أضيفت إليها عنصر جديد في التعليم عن بعد ألا وهو البيئة الإلكترونية. في ظل جانحة كورونا 19COVID والتي بدأت مع نهاية سنة 9102 والتحول السريع من التعليم التقليدي الي التعليم عن يعد الخطط التعليمية المعدة مسبقا فيه تطوير ً بعد و إشراك التعليم عن بعد في تنف . هذا التحول السريع والذي لم يتم َ أدي الي ظهور بعض المشاكل في مخرجات العملية التعليمية. فالتعليم عن عناصر التعليم ولم يتم الإعداد له مسبقا بعد وإن كانت عناصره الأساسية هي نفس عناصر التعليم التقليدي إلا أن الأسلوب في تنفيذه أختلف بإدخال عنصر جديد أساسي وهو البيئة الإلكترونية التي من خلالها يتم تنفيذ الخطط التعليمية. في هذه الورقة البحثية سوف يتم دراسة أهم العناصر الفاعلة والمؤثرة في العملية التعليمية للتعليم عن بعد والمشاكل الناجمة عن هذا التحول السريع ثم إيجاد الحلو ل المناسبة لمواكبة التطور في سير العملية التعليمية وذلك من خلال دراسة تقييمية لتجربة كلية العلوم بجامعة غريان وسوف تكون نتائج هذا البحث مفيدة لتنفيذ التغيرات في النظام التعليمي ولتلبية متطلبات المعايير التعليمية الحديثة للتعليم العالي.

أيمن أحمد محمد أحمد، ناصر علي أبوراوي الفيض، طارق الهادي محمد خليفة، عبدالحكيم مصطفى التريكي، كمال المبروك سليمان، حاتم أحمد محمد المبروك، (02-2022)، ليبيا: المؤتمر العلمي الأول لتقنية المعلومات وعلوم الحاسوب كلية تقنية المعلومات، 45-56

Revisiting Virtual Execution Policies for Optimistic Concurrency Control: The Real-Time Benefits of Writing Before Validating.
Journal Article

In this paper we present an approach to optimistic concurrency control where the write phase occurs before the validation phase (RWV instead of RVW). Our work extends earlier research into real-time databases that utilized virtual execution to lower disk access overheads. Such work demonstrated that virtual execution allowed an increase in transactions completing before deadlines expired and improvements in overall throughput. However, we demonstrate that only with the reversal of the write and validation phases can virtual execution reach its full potential.

Naser Alfed, Kamal Solaiman, Khaled Farj, Abubkr Abdelsadiq, (12-2021), ليبيا: جامعة غريان, 22 (2),

Role of Karhunen–Loève transform in distincting followed ancient lava flow and exploring mineral composite in the Central of Libya
Journal Article

Abstract: The igneous rock unit of Al-Haruj Al-Aswad were interpreted using satellite image. The satellite image of Land sat bands from one tosevenhas captured by the Thematic Mapper (TM7) scanner. These imageswere processed and interpreted with following standard technique. Karhunen– Loèvetransform were employed to produce principalcomponent images. Then, they were paintedby using RGB color system to produce false color images from principal component images and ratio images. The resulted images were interpreted in the matter of geology of the area.Theprincipalcomponent transformation is helpful in mapping different lava flow phases in the area. This transform have used the correlation between the corresponding pixels in images of different bands. Six lava flow phases was interpreted depends on their color and shade in the processed satellite images. 

Mahmood Salem Elhadi Dhabaa, (12-2021), غريان: جامعة غريان, 22 346-355

Using technical of remote sensing to discriminate the percentage of iron raw in the Wadi El-shati
Journal Article

Abstract

The rock units of Wadi El-shati were classified to group of clusters to explain the concentration of iron ore by using enhanced satellite image. The several images of single band of Thematic Mapper (TM7) of Landsat were combined to produce multispectral image bands. It was processed by group of filters after the false color image has been made. The filtered image was classified with unsupervised classification after the image ratio has been done by dividing band 3 on band1. Finally, we reached the classified image has concentration of iron tone.

Mahmood Salem Elhadi Dhabaa, (10-2021), غريان: مجلة الجبل للعلوم التطبيقة والانسانية, 8 48-58

HIGH HIDING CAPACITY AUDIO WATERMARKING METHOD BASED ON DISCRETE COSINE TRANSFORM
Journal Article

This paper presents a new high-capacity algorithm for audio watermarking for the purpose of embedding a watermark audio signal into an original audio signal. This algorithm uses DCT (discrete cosine transform) in combination with SVD (singular value decomposition), DWT (discrete wavelet transform), and CZT (chirp ztransform). For the purpose of ensuring high levels of imperceptibility and robustness, a low-frequency sub band of 1-level DWT is selected to embed the watermark, followed by DCT, CZT, and SVD. As a result, the proposed algorithm achieves a high capacity of 352800 bits per second while a good quality audio signal is maintained (having an objective difference grade of more than-0.04). It also provides high imperceptibility (a signal to noise ratio of more than 58 dB) and it is extremely resistant to common audio attacks, including requantizing, resampling, additive white Gaussian noise or AWGN, MP3 compression, and low-pass filtering. The proposed algorithm presents much better compared to the audio watermarking algorithms already existent.

Omar Moftah Ibrahim Abodena, Ali Alashtir, (08-2021), International Journal of Advance Research and Innovative Ideas in Education: IJARIIE, 7 (4), 677-684

The First Record of A medicinal Plant Species Prosopis farcta (Banks & Sol) .J.F.Macbr (Fabaceae; Mimosoideae) from Libya
Journal Article

Prosopis farcta (Banks & Sol.) J. F. Macbr. has been reported for the first time from Libya. This species is native in Asia. Flowering specimens of Prosopis farcta collected from Sokna Region about 650 Km south-east Tripoli. It is presented with updated nomenclature, taxonomic description, geographical distribution, place of occurrence in Libya, and field colored photographs are also provided. The voucher specimens were deposited in the Herbarium of Botany Department (ULT), University of , Tripoli, Libya.

Shhoob Mohamed imhmed Elahmir, (07-2021), UNITED STATES: تم اختياره Quest Journals, 8 (6), 39-43

Robust and high-capacity audio watermarking basedon chirp z-transform
Conference paper

A novel non-blind audio watermarking algorithm, using chirp z-transform in combination with discrete wavelet transform and singular value decomposition, is presented in this paper. In the proposed method, a watermark audio signal (about 13 seconds in length) is hidden into an original audio signal (about 51 seconds in length) by applying discrete wavelet transform, chirp z-transform, and singular value decomposition. The effectiveness of the proposed algorithm has been tested using signal-to-noise ratio, objective difference grade (ODG), and normalised cross- correlation of watermarked audio signal under various common audio attacks. Experimental results demonstrate that the algorithm has a high capacity (352.8 kbps), without significant perceptual distortion (ODG > -0.29) and provides good robustness against common audio attacks, including: re-sampling, echo addition, MP3 compression, additive white Gaussian noise, re- quantisation, cutting, and low-pass filtering. This algorithm has a high capacity and excellent audio quality compared with other audio watermarking algorithms.

Omar Moftah Ibrahim Abodena, (05-2021), 2021 29th IEEE Signal processing and communications applications conference (SIU): IEEE, 1-4

Biosynthesis of Silver Nanoparticles Using Olive Wastewater
Journal Article

Biosynthesis of the metallic nanoparticle is gaining importance because it’s a single-step process, nontoxic, environmentally acceptable, and easily scaled up. The present study investigated the biosynthesis of silver nanoparticles (AgNPs) via reacting olive wastewater filtrate (OWF) with silver nitrate, and the formation of AgNPs was confirmed by a color change of the reaction mixture and visible spectrophotometry. Additionally, the influence of pH, reaction time, AgNO3 concentration, temperature, and OWF volume on the proposed method was investigated. It was found that with increasing the previously mentioned parameters, the formation of the AgNPs was increased under the experimental conditions. The results showed that OWF represented a promising material for the biosynthesis of AgNPs.      


Nawal Abdurazq Elhadi Ahmad, Abdounasser Albasher Omar, (03-2021), الشبكة العنكبوتية: Journal of Materials NanoScience, -20 (-1), 5-0

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