موقف الولايات المتحدة الأمريكية من الحرب العالمية الأولي 1914 م
مقال في مجلة علمية

يشير هذا البحث الي الوقوف علي أهم الاسباب التي دفعت الولايات المتحدة للدخول الي غمار الحرب العالمية الاولي، في شهر ابريل 1917م بعد سنتين ونصف من جهود الرئيس الأمريكي (ويلسون)، ودوره في ابقاء الولايات المتحدة محايدة خلال الحرب العالمية الأولي، حيث أعلنت الولايات المتحدة الحرب علي ألمانيا في 6 ابريل 1917م، أما النمسا فلم تعلن الولايات المتحدة الحرب عليها الا في 7 ديسمبر من العام نفسه ، كما انها لم تعلن الحرب مطلقا علي الدولة العثمانية (تركيا).

ويذكر المؤرخون أن الولايات المتحدة عندما دخلت الحرب كانت تعيش في فراغ سياسي، ولم تكن تدرك أهمية عامل القوة في العلاقات الدولية، وذلك علي عكس الدول الاوروبية التي كانت تقدر طبيعة القوة والدور الذي تلعبه في المجال الدولي.

وكانت الولايات المتحدة تخشي من سيطرة المانيا علي أوروبا، وأن تمد نفوذها الي البلقان والشرق الأوسط، وهذا من أن يشكل تهديدا خطيرا لسلامة الولايات المتحدة الا ان الولايات المتحدة لم تكن لتقرر التحالف مع فرنسا وبريطانيا في هذه الحرب لو أن الألمان لم يشنوا حرب الغواصات الخطيرة في ربيع 1917م .

وفي 6 ابريل 1917م صادق الكونغرس الامريكي علي اعلان الحرب ضد ألمانيا علي اثر اغراق الغواصات الالمانية لبعض السفن الامريكية، وهكذا وضعت تحت تصرف دول الوفاق الودي امكانيات أغني دولة في العالم، وأكبر الأقطار انتاجا للصناعات الحربية والغدائية، فتحولت بذلك كفة الميزان الي دول الوفاق، بعد الانتصارات التي حققتها القوات الألمانية في جبهات القتال الغربي في بداية الحرب.


عائشة مسعود المليان بازين، أسماء مصطفي محمد دبوس، (09-2021)، ليبيا: مجلة آفاق المعرفة، 2 (2)، 165-179

Investigation of Andrographolide Effect on Non-Infected Red Blood Cells Using the 1H-NMR-Based Metabolomics Approach
Journal Article

Andrographolide (AG) has been shown to have several medicinal and pharmaceutical effects, such as antimicrobial, anti-inflammatory, antioxidant, anti-diabetic, and anti-malarial activities. Moreover, studies to assess the pharmacological effect of AG on the metabolic changes of uninfected red blood cells (uRBCs) have not yet been investigated. This study aims to evaluate the pharmacological effects of AG compared to chloroquine (CQ) on the metabolic variations of uRBCs in vitro using a proton nuclear magnetic resonance (1H-NMR)-based metabolomics approach coupled with multivariate data analysis (MVDA). Forty-one metabolites were successfully identified by 1H-NMR. The results of the unsupervised data analysis principal component analysis (PCA) showed ideal differentiation between AG and CQ. PC1 and PC2 accounted for 71.4% and 17.7% of the explained variation, respectively, with a total variance of 89.10%. Based on S-plot and VIP values, a total of 28 and 32 metabolites were identified as biomarkers in uRBCs-AG and uRBCs-CQ, respectively. In uRBCs treated with AG, ten metabolic pathways were determined to be disturbed, including riboflavin metabolism, d-glutamate and d-glutamine metabolism, phenylalanine metabolism, glutathione metabolism, proline and arginine metabolism, arginine biosynthesis, citrate cycle, glycolysis/gluconeogenesis, and pyruvate metabolism as well as alanine, aspartate, and glutamate metabolism. In contrast, in CQ-treated uRBCs, nine affected metabolic pathways were determined, which involved the same metabolic pathways for uRBCs-AG, except for glutathione metabolism. These findings suggest an evident relationship between AG and CQ associated with metabolic changes in intact RBCs after being exposed to the treatment. The metabolomics results could allow useful comprehensive insights into the underlying mechanism of the action of AG and CQ on red blood cells. Consequently, the 1H-NMR-based metabolomics approach was successfully utilized to identify the pharmacological effects of AG and CQ on the metabolic variations of uRBCs.

ASHRAF AHMAD ISSA ALAPID, (08-2021), Metabolites: MDPI, -11 (8), 486-526

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

ثلوث المياه الجوفية في مدينة الاصابعة (دراسة تحليلية)
مقال في مجلة علمية

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عادل إبراهيم بشير دبوبة، (08-2021)، طرابلس: مجلة المعرفة، 1 (2)، 130-158

Problems in Teaching Listening to Libyan 3rd Year Secondary School Students ( Assaba Area
Journal Article

Abstract

Although listening skill plays a significant role in daily communication and

education process in teaching English , listening subject has long been neglected

in second language teaching. This study aims to explore problems, difficulties

and barriers in teaching listening to Libyan students in our case study Alassaba

area, 3rd year secondary science school, Mosab Ben Omer Secondary School

and Omer Ben Alkhtab Secondary school. The participants of our study were 5

teachers. Classroom observation and teacher’s interview are used for data

collection. It is found that all teachers were using grammar translation method

in teaching listening. Most classes were uncomfortable learning atmosphere,

beside the absence of technology which used and facilitate teaching listening.

The findings based on data analysis and discussion may be of a great

significance to find solutions for these problems and improving the way of

teaching listening

Waleed Aldhawi Kareem Almishraqi, Abdulmjeed Emhmmed Khalefi almogatef, (07-2021), جامعة غريان: مجلة المنارة, 4 (1), 252-246

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

OPTIMUM DESIGN OF VERTICAL RECTANGULAR FIN ARRAY
Journal Article

Experimental and numerical investigations have been performed to study the natural convection heat transfer from a vertical rectangular fin arrays at different orientation angles.An experimental setup was constructed and calibrated to test different fin configurations. It basically consists of base plate, an array of parallel longitudinal fins, heating unit and layers of thermal insulation. Fin length (L) and fin thickness (t) were kept fixed at 187 and 6.5 mm respectively, while fin spacing (S) was varied from 3 to 16 mm and fin height (H) was varied from 15 to 45 mm. The orientation angle (β) was changed from 0° to 60°, and temperature difference between fin and surrounding (∆T) from 30 to 95 o C.Base-to-ambient temperature difference was also varied through a calibrated wattmeter ranging from 10 to 180W. To understand the general flow patterns dominating flows from the heat sink, the three-dimensionless elliptic governing equations were solved using finite volume computational fluid dynamics (CFD) code. A comparative study between the experimental and numerical results was performed to verify the numerical code. It was found for the configuration tested that the heat transfer rate per unit base area increases with the increase in the fin spacing and reaches a maximum value then decreases with farther increase in the fin spacing. The maximum heat dissipation occurs at optimal spacing S opt =7 mm. Empirical correlations between Nussult number, Rayleigh number, fin spacing, fin height, orientation angle, temperature difference between the fin and surroundings were derived. Finally the present work general empirical formula is given in the form =. .. .. Where , 15 mm ≤ H ≤ 45 mm, 3mm ≤ S ≤ 16 mm, °0 ≤ β ≤°60, t = 6.5 mm, L = 187 mm.

Hmza Ashur Milad Mohamed, (07-2021), USA: IJSRED, 4 (4), 1110-1133

الحوكمة الإدارية وعلاقتها بالولاء التنظيمي بالجامعات الليبية
مقال في مجلة علمية

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عبدالعزيز زهمول الضاوي الضبع، (07-2021)، جامعة المعرقة - طرابلس: مجلة المعرفة، 1 (1)، 31-57

خفض الركام الخشن في الخلطة الخرسانية وتأثيره على مقاومة الضغط للخرسانة
مقال في مجلة علمية

Abstract:

This study includes the effect of reducing coarse aggregate in concrete mixture on its softening and hardening properties, where the concrete mixtures were prepared with varying proportions of coarse aggregate and replaced with fine aggregate (30%, 40%, 50

Hardened concrete was studied by means of a compression resistance test. The average compressive strength of three samples taken , and that is after the concrete has been treated by immersing in water for a period of 7 days, 14 days, and 28 days.

The operational degree of softened concrete was determined for all the above mentioned ratios, where six concrete mixtures were prepared, with a total of 60 cubes, at a ratio of mixing 1:2:4 cement and aggregate (fine, coarse) and by adding water to cement in a ratio of 0.5, the results indicated that the concrete of (40%) coarse aggregate was most suitable for use in desert areas.

Key Words: Coarse aggregate, Fine aggregate, Compressive strength.

خالد محمد عمرو أمحمد، (07-2021)، المعهد العالي للعلوم والتقنية غريان: مجلة غريان للتقنية، 7 (7)، 81-88

المستوى التعليمي للوالدين وعلاقته بالعنف ضد الأبناء) (دراسة ميدانية
مقال في مجلة علمية

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عبدالعزيز زهمول الضاوي الضبع، (06-2021)، مجلة الجامعة: جامعة غريان، 21 (2021)، 71-88

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