The critical micelle concentration (CMC) of nonylphenolethoxylate (NPE) surfactant has been determined by measuring the surface tension as a function of the molar concentration of the surfactant in aqueous and binary mixture of water + methanol solutions at a temperature range from 20?C to 35?C. The interfacial parameters ?max, Amin, ?cmc and ?G?ads were calculated. The results indicate that the CMC increases as the temperature increases and that the addition of methanol the CMC decreases. The thermodynamic parameters such as standard Gibbs free energy (?G?), enthalpy (?H?), and entropy (?S?) of micellization were estimated using the change of CMC with temperature. The enthalpy – entropy compensation behavior of the surfactant was evaluated and a good linearity in the compensation plot has been observed.
Recently, the development of the field of biomedical engineering has led to a renewed interest in detection of several events. In this paper a new approach used to detect specific parameter and relations between three biomedical signals that used in clinical diagnosis. These include the phonocardiography (PCG), electrocardiography (ECG) and photoplethysmography (PPG) or sometimes it called the carotid pulse related to the position of electrode.
Comparisons between three cases (two normal cases and one abnormal case) are used to indicate the delay that may occurred due to the deficiency of the cardiac muscle or valve in an abnormal case.
The results shown that S1 and S2, first and second sound of the
... Show Moreما من شك ان الارهاب يعُد من اكثر الجرائم رعباً في الوقت الراهن، وقد اتخذت الجرائم الارهابية مع الزمن منحى آخر حيث استثمر الارهابيون مستحدثات العلم الحديث وبدءوا باستحداث وسائل جديدة في اداء العمل الارهابي بدون عنف أو اراقة دماء، كما تم تجنيد العديد من العلماء والباحثين المارقين والمأجورين من قبل التنظيمات الارهابية او من قبل دول وذلك من اجل تنفيذ جرائمهم الارهابية.
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... Show MoreData steganography is a technique used to hide data, secret message, within another data, cover carrier. It is considered as a part of information security. Audio steganography is a type of data steganography, where the secret message is hidden in audio carrier. This paper proposes an efficient audio steganography method that uses LSB technique. The proposed method enhances steganography performance by exploiting all carrier samples and balancing between hiding capacity and distortion ratio. It suggests an adaptive number of hiding bits for each audio sample depending on the secret message size, the cover carrier size, and the signal to noise ratio (SNR). Comparison results show that the proposed method outperforms state of the art methods
... Show Moreان اي مجتمع لابد له من سلطة تنظم امره وتدبر شؤونه لان المجتمع الانساني ضروري ويعبر الحكماء عن هذا بقولهم (( الانسان مدني بالطبع اي لابد له من الاجتماع ))(
[i]) ، وان مبدأ سيادة القانون يتطلب وجود دولة قانونية تقوم على اركان حقيقية تستمد قوتها من الشعب باعتباره مصدر السلطات ،ولها قوة ملزمة تستمدها من القواعد الدستورية التي ارست عليها بنائها القان
... Show MoreMany new heterocyclic compounds including 4-thiazolidinones containing indole with triazole units were described. The new Schiff bases [VII]a, b and [VIII]a,b synthesized by condensation acid hydrazides [II],[VI] with different (aromatic) aldehydes in absolute ethanol. The refluxing equimolar amounts of the Schiff bases ([VII]a,b, [VIII]a,b) with thioglycolic acid in benzene led to get thiazolidin-4-ones derivatives ([IX]a,b and [X]a-d). Finally, the new derivatives [XI]a-c run out via the reacted compound [IX]a with di