Protecting information sent through insecure internet channels is a significant challenge facing researchers. In this paper, we present a novel method for image data encryption that combines chaotic maps with linear feedback shift registers in two stages. In the first stage, the image is divided into two parts. Then, the locations of the pixels of each part are redistributed through the random numbers key, which is generated using linear feedback shift registers. The second stage includes segmenting the image into the three primary colors red, green, and blue (RGB); then, the data for each color is encrypted through one of three keys that are generated using three-dimensional chaotic maps. Many statistical tests (entropy, peak signa

The characterization of ZnO and ZnO:In thin films were confirmed by spray pyrolysis technique. The films were deposited onto glass substrate at a temperature of 450°C. Optical absorption measurements were also studied by UV-VIS technique in the wavelength range 300-900 nm which was used to calculate the optical constants. The changes in dispersion and Urbach parameters were investigated as a function of In content. The optical energy gap was decreased and the wide band tails were increased in width from 616 to 844 eV as the In content increased from 0wt.% to 3wt.%. The single–oscillator parameters were determined also the change in dispersion was investigated before and after doping.

Cadmium Oxide and Bi doped Cadmium Oxide thin films are prepared by using the chemical spray pyrolysis technique a glass substrate at a temperature of (400?C) with volumetric concentration (2,4)%. The thickness of all prepared films is about (400±20) nm. Transmittance and Absorbance spectra are recorded in the wave length ranged (400-800) nm. The nature of electronic transitions is determined, it is found out that these films have directly allowed transition with an optical energy gap of (2.37( eV for CdO and ) 2.59, 2.62) eV for (2% ,4%) Bi doped CdO respectively. The optical constants have been evaluated before and after doping.

The present study was aimed to investigate the possible effects caused by the antibiotic, metronidazole, on the histology of the testis and the morphology of the sperms of mice. To achieve this,  adult male albino Swiss Mice were orally administrated with 0.1 ml (100 mg\ kg ) of the commercially used metronidazole (Flagyl) for 60 consecutive days. The results showed significant decreases (p<0.05) in the mean weight of body and testis in the treated mice as compared to the distilled water-treated control group. The treatment also caused several histopathological changes in the testis which included necrosis, congestion, hemorrhage, edema, germ cell downfall  and rupture in the seminiferous tubules. The tests of the sp

This paper represents an experimentalattempt to predict the influence of CO2-MAG welding variables on the shape factors of the weld joint geometry. Theinput variables were welding arc voltage, wire feeding speed and gas flow rate to investigate their effects on the shape factorsof the weld joint geometry in terms of weld joint dimensions (bead width, reinforcement height, and penetration). Design of experiment with response surface methodology technique was employed to buildmathematical models for shape factors in terms of the input welding variables. Thepredicted models were found quadratic type and statistically checked by ANOVA analysis for adequacy purpose. Also, numerical and graphical optimizations were carried out

يهتم البحث  بدراسة  المثير  الحسي  ودورهُ  في فهم  وتفسير المنتج الصناعي المعاصر ، تحددت مشكلة  البحث بالتساؤل التالي : ما هي طبيعة المثير الحسي  ودورهُ  في فهم  وتفسير المنتج الصناعي المعاصر؟  وتحدد هدف  البحث  في الكشف عن  المثير  الحسي  ودوره  في تصميم  المنتج الصناعي المعاصر ، كما تضمن البحث الكلمات المفتاحية ( المثير الحسي ، الفهم والتفسير)

تضمن  الإطار ا

تهدف هذه الدراسة إلى تحليل مفهوم الجدية بوصفه قيمة تصميمية مؤثرة في تصميم المنتجات الصناعية الذكية، ودوره في تحقيق التوازن بين الابتكار والاستدامة وتلبية احتياجات المستخدم. تركز على العلاقة بين عناصر الجدية (كالالتزام، والتحكم، والتحدي) وأبعاد التصميم الذكي مثل الجودة والتكامل والابتكار. كما تستعرض دور التقنيات المتقدمة كالذكاء الاصطناعي والنانو تكنولوجي والتوأم الرقمي في دعم هذا المفهوم. وتكمن أهمية ا

يهدف هذا البحث إلى الكشف عن جماليات العلاقة الشكلية بين الفنون البصرية والعمارة السيبرانية. ولتحقيق ذلك تم استخدام المنهج الوصفي التحليلي من خلال تناول جماليات العلاقة الشكلية، والفنون البصرية، والعمارة السيبرانية، وتحليل بعض الأعمال الفنية المختارة الموجودة في مواقع شبكة الإنترنت بأسلوب تحليل المحتوى؛ للوصول إلى الكشف عن جماليات العلاقة الشكلية بين الفنون البصرية والعمارة السيبرانية. حيـث تم اختيـار

مهمة هذا البحث الاجابة عن استراتيجية معنى الفن لذاته في عدد من اساليب الفن التشكيلي المعاصر، ومن اجل هذا الشأن نبني على التفريق في مهمة الفن بين محتوى الفكرة وبين محتوى الموضوع ففي محتوى الفكرة نتناول المحسوسات البصرية المتوهمة، ومن المؤكد يمكن التفريق بين المحسوسات الحقيقية والمحسوسات المتوهمة، وفي المحسوسات المتوهمة تفرق بين عدة انواع تبعاً لمصادرها، فهي اما عن متخيل او وهم في حلم او وهم ابصار ظهر في ظر

The objective of the study is developing a procedure for production and characterization of rice husk ash (RHA). The effects of rice husk (RH) amount, burning/cooling conditions combined with stirring on producing of RHA with amorphous silica, highest SiO₂, lowest loss on ignition (LOI), uniform particle shape distribution and nano structured size have been studied. It is concluded that the best amount is 20 g RH in 125 ml evaporating dish Porcelain with burning for 2 h at temperature 700 °C combined with cooling three times during burning to produce RHA with amorphous silica, SiO₂ 90.78% and LOI 1.73%. On the other hand, cooling and stirring times affect the variation of nano structured size and particle shape dis

  This research aims  to know the reality of  implementation of  Knowledge Management in Saudi Universities Applied  in Shaqra University and to study the difficults whish encountered in applying the Knowledge Management approach.

The study investigated the university staff  in Shaqra, Thadig, and Huraymila branches,  using a questionnaire designed by the researcher to collect the data, sample of (260) members was used, applying the descriptive analytical approach to test the hypothesis by using (SPSS) program.

The study revealed that the first four zero hypothesis are rejected because there is medium approval of the university members on the fo

المستودع الرقمي العراقي. مركز المعلومات الرقمية التابع لمكتبة العتبة العباسية المقدسة

This paper aims to decide the best parameter estimation methods for the parameters of the Gumbel type-I distribution under the type-II censorship scheme. For this purpose, classical and Bayesian parameter estimation procedures are considered. The maximum likelihood estimators are used for the classical parameter estimation procedure. The asymptotic distributions of these estimators are also derived. It is not possible to obtain explicit solutions of Bayesian estimators. Therefore, Markov Chain Monte Carlo, and Lindley techniques are taken into account to estimate the unknown parameters. In Bayesian analysis, it is very important to determine an appropriate combination of a prior distribution and a loss function. Therefore, two different

كان تأثير كوفيد-19 على الشركات هو الأسوأ من أي وباء سابق. تأثرت من خلالها سلاسل التوريد العالمية وعمليات وأداء الشركات بجائحة كوفيد-19، مما جعل المؤسسات الصغيرة والمتوسطة (SME) أكثر عرضة للتأثر. في الوقت نفسه، تظهر مجموعة كبيرة من الأدبيات القائمة على ابحاث الاثر الضار للاضطرابات على الشركات. هناك نقص حاد في الأدبيات المتعلقة بآثار الاضطرابات على أداء المؤسسات الصغيرة والمتوسطة والعناصر التي يمكن أن تزيد من صم

Bentonite is widely used in industrial applications. The present study reports the effect of adding different weights of ZnO to the Iraqi bentonite, on surface area, pore volume and real density. These surface properties were evaluated for pure and modified bentonite. The modification was made by adding different ZnO weights such as; ( 0.5%, 1%, 5%, 10% ). The effect of heat exposing for all modified clay samples at 500 ?C have been also evaluated. The results show that the addition of 0.5% ZnO leads to increase the surface area percentage about 36%, increase pore volume percentage about 5.48% and increase the real density percentage about 27.116%. When the samples exposed to 500 ?C, their surface area and pore volumes have been decreased a

The present study included the effect of acute exposure of different concentrations of sodium chloride on the Zooplankton Crustacean Daphnia pulex which belong to the order Cladocera. The lethal concentrations killing 50% of the population (LC50) after 24hrs and 48hrs were 2.95‰ and 2.63‰ respectively While lethal concentrations killing 100%  of the population (LC100) and non lethal concentrations (LC0) were 6‰ and 0.5‰ after 24hrs of exposure to NaCl. The acute exposure of the Crustacean Daphnia pulex showed increasing in mortality percentages with increasing the concentrations and exposure time

The new ligand [N1,N4-bis((1H-benzo[d]Glyoxalin-2-yl)carbamothioyl)Butanedi amide] (NCB) derived from Butanedioyl diisothiocyanate with 2-aminobenz imidazole was used to prepare a chain of new metal complexes of Cr(III), Mn(II), Co(II), Ni(II), Cu(II), Pd(II), Ag(I), Cd(II) by general formula [M(NCB)]Xn ,Where M= Cr(III), n=3, X=Cl; Mn(II), Co(II), Ni(II), Cu(II), Pd(II), Cd(II) ,n=2 , X=Cl; Ag(I), n=1, X=NO3. Characterized compounds on the basis of 1H, 13CNMR (for (NCB), FT-IR and U.V spectrum, melting point, molar conduct, %C, %H, %N and %S, the percentage of the metal in complexes %M, Magnetic susceptibility, thermal studies (TGA),while its corrosion inhibition for mild steel in Ca(OH)2 solution is studied by weight loss. These measureme

A phytoremediation experiment was carried out with kerosene as a model for total petroleum hydrocarbons. A constructed wetland of barley was exposed to kerosene pollutants at varying concentrations (1, 2, and 3% v/v) in a subsurface flow (SSF) system. After a period of 42 days of exposure, it was found that the average ability to eliminate kerosene ranged from 56.5% to 61.2%, with the highest removal obtained at a kerosene concentration of 1% v/v. The analysis of kerosene at varying initial concentrations allowed the kinetics of kerosene to be fitted with the Grau model, which was closer than that with the zero order, first order, or second order kinetic models. The experimental study showed that the barley plant designed in a subsu

The synthesis and bioactivity of zinc oxide nanoparticles has been extensively studied. The antibacterial activity of different antibiotics individually (ceftriaxone (C), chloramphenicol (CRO), penicillin (P) and amoxicillin (Ax)) and Zinc oxide nanoparticles (60μg/ml) in combination with the previously mentioned antibiotics has been demonstrated in the present study by using the disk diffusion assay method. The results showed a synergistic effect between Zinc oxide nanoparticles (ZnO NPs) and both Ax and P for most of the studied Gram-positive isolates (Staphylococcus aureus1, Staphylococcus aureus2, Staphylococcus epidermidis1, Staphylococcus epidermidis2, Enterococcus faecalis1, Enterococcus faecalis2 ) and between ZnO NPs and both C

Amiodarone (AMD), a powerful antidysrhythmic medication, can cause hepatotoxicity when used long-term or in high doses. It affects both mitochondrial and lysosomal function because of its lipophilic nature and accumulation in tissues. It also has direct production of ROS. Glycyrrhiza glabra is one of the medicinal plants that have been commonly used for thousands of years. It possesses anti-ulcer, anti-inflammatory and antioxidant properties. In this study, the antihepatotoxic effect of Gg was evaluated against AMD liver toxicity in rats model, thirty rats were taken and divided evenly into five groups given daily doses by gastric gavage oral tube for 3 weeks as follows: the 1st group acted as a control group given D.W., and the

تكمن اهمية البحث في  تأثير استخدام انموذج التعلم البنائي في تنمية التحصيل المعرفي وتعلم مهارة الدحرجة بكرة القدم لطلاب الصف الثاني متوسط و تطرق الباحثان الى مشكلة البحث من خلال الطريقة المتبعة من قبل المدرس و القائمة على أساس الإمتثال و العمل وفق للأنموذج المتبع (الأسلوب الأمري)، فضلاً عن قلة الإهتمام بالجانب النظري في درس التربية الرياضية لا تتماشى وما يمر به عصرنا اليوم من تطور معرفي الأمر

The study of traffic on the roads the governorate of Karbala, Where is the study of traffic on the roads measure is necessary to determine the extent of the road and highlighting the importance of its role in the transfer of individuals from original to destination as well as the importance of the region that attracted its movement. This research aims to analyze the traffic in the governorate of Karbala through the study and analysis of surveys of traffic that were made in the governorate. Based on this analysis, it has been reached to identify volumes of the traffic and its density and how the roads are efficient and accommodating these volumes, the results of the traffic survey of the studied roads in the area of the study have shown t

Improving the quality of health services in the health sector is an important and necessary matter that must be taken care of and improved, and this study seeks to demonstrate the role of quality costs in improving the quality of health services and achieving a high level of quality to satisfy the beneficiaries and to provide health services of good quality, and the research concluded that the main point of service provision Good health is the costs of prevention and evaluation (costs of quality conformity) and attention to it, and that technical competition contributes greatly to the development of the level of quality, as well as the use of health and medical staff with competent expertise, and that the costs of internal failure and th