New combined model of high impedance arcing fault in overhead transmission system

High impedance fault is a popular complex phenomenon that exhibits high nonlinear behavior. For most distinctive characteristics of high impedance fault, are asymmetry and nonlinearity, so, in order to obtain an accurate model of high impedance fault, it is necessary to develop a model that gives the most distinctive characteristics of high impedance fault. In this paper we propose a novel model of high impedance arcing fault in electrical power transmission system. Proposed model is based on the digital arc model incorporated with specially developed custom model which has been designed in PSCAD/EMTDC program. The results is clearly reveal that the proposed model gives the important characteristics of high impedance fault (HIF) which is essential for development of reliable detection algorithms

Identification of asymmetrical faults in electrical power systems based on signal processing and neural network

In the present era, faults are the greatest interruption for the power system utility. Theses, faults on electrical power systems are unavoidable problems and will continue to happen. These faults are effects on the power system reliability and stability, hence, diagnosis and classification of such faults in rapid and accurate way is an important issue. In this paper, combination method of digital signal processing and multi-layer neural network has presented. The methodology has divided in two steps, firstly: wavelet transform has implemented in here for pre-processing the data, which is used to extract the useful information during the fault in both time and frequency domain, and calculate the features of coefficients which is used as input for neural network. Secondly: multi-layer neural network has adopted here to detect and classify the unsymmetrical faults in different conditions such as single line to ground fault, line to line to ground fault and double line fault. Power System Computer-Aided Design /Electromagnetic Transients with DC (PSCAD/EMTDC) used to simulate the three types of asymmetry faults. Simulation results reveal that the proposed method gives satisfactory results, and will be very useful in the development of a power system protection schem

Evaluation of Apoptotic Effect of Betanin Nanoparticles Against Squamous Cell Carcinoma Cell Line Compared to Doxorubicin

Aim: to evaluate the anticancer effect of nano sized betanine particles (betanine NP) on squamous cell carcinoma cell line compared to doxorubicin (DOX) by measuring apoptosis through caspase 3. Material and Methods: Three groups of the human tongue squamous cell carcinoma cell line (SCC 25) were created, and two of them were treated with DOX and betanine NP. The third group served as a negative control and was not given any treatment. To evaluate the concentration of caspase 3 using the ElISA technology, different quantities of betanin NP and DOX were administered to SCC25 at 48- and 72-hour intervals. Results: Caspase 3 levels in the current investigation were 501.69.93, 543.86.71 pg/ml for DOX and 336.913.1, 405.53.5, and respectively for betanine NP in 48h and 72h intervals. Additionally, morphological analysis was performed to demonstrate the cells’ apoptotic alterations. There was a highly statistically significant difference between samples of various materials, as revealed by the ANOVA test for Comparison between groups using the ELISA technique for caspase 3 detection at 48h and 72h (p0.001). These findings suggest that DOX has a stronger apoptotic effect on SCC25 cells than betanin NP. Conclusion: Our findings explained that DOX and betanine NP can induce cancer cell death against SCC 25 cell lines by increasing the concentration of caspase 3. DOX has higher apoptotic effect on SCC25 cells than betanin NP according to ELISA technique.</jats:p

Consensus Guideline on the Management of Epilepsy in Egypt: A National Delphi Consensus Study

Abstract Objective In epilepsy, early diagnosis, accurate determination of epilepsy type, proper selection of antiseizure medication, and monitoring are all essential. However, despite recent therapeutic advances and conceptual reconsiderations in the classification and management of epilepsy, serious gaps are still encountered in day‐to‐day practice in Egypt as well as several other resource‐limited countries. Premature mortality, poor quality of life, socio‐economic burden, cognitive problems, poor treatment outcomes, and comorbidities are major challenges that require urgent actions to be implemented at all levels. In recognition of this, a group of Egyptian epilepsy experts met through a series of consecutive meetings to specify the main concepts concerning the diagnosis and management of epilepsy, with the ultimate goal of establishing a nationwide Egyptian consensus. Methods The consensus was developed through a modified Delphi methodology. A thorough review of the most recent relevant literature and international guidelines was performed to evaluate their applicability to the Egyptian situation. Afterward, several remote and live rounds were scheduled to reach a final agreement for all listed statements. Results Of 278 statements reviewed in the first round, 256 achieved ≥80% agreement. Live discussion and refinement of the 22 statements that did not reach consensus during the first round took place, followed by final live voting then consensus was achieved for all remaining statements. Significance With the implementation of these unified recommendations, we believe this will bring about substantial improvements in both the quality of care and treatment outcomes for persons with epilepsy in Egypt. Plain Language Summary This work represents the efforts of a group of medical experts to reach an agreement on the best medical practice related to people with epilepsy based on previously published recommendations while taking into consideration applicable options in resource‐limited countries. The publication of this document is expected to minimize many malpractice issues and pave the way for better healthcare services on both individual and governmental levels

Consensus Guideline on the Management of Epilepsy in Egypt: A National Delphi Consensus Study

Abstract In epilepsy, early diagnosis, accurate determination of epilepsy type, proper selection of anti-seizure treatment, and monitoring; all are essential. However, despite recent therapeutic advances and conceptual reconsiderations in the classification and management of epilepsy, serious gaps are still encountered in day-to-day practice in Egypt as well as several other limited resources countries. Premature mortality, poor quality of life, disabilities, diminished family function, cognitive problems, poor treatment outcomes, comorbidities, and significant economic burden are major challenges that impose urgent actions to be implemented at all levels. In recognition of this, a group of Egyptian epilepsy experts met through a series of consecutive meetings to specify main concepts and questions concerning the diagnosis, evaluation, and management of Epilepsy, with an ultimate goal of establishing a nationwide Egyptian consensus to guide health care professionals in the management of patients with epilepsy in general and to declare a pragmatic pathway for patients with drug-resistant epilepsy. The consensus was developed through a modified Delphi methodology. A thorough review of the most recent relevant literature and international guidelines was performed to evaluate their applicability to the Egyptian situation. Afterward, several remote and live rounds were scheduled to reach a final agreement for all listed statements. With the implementation of these unified recommendations, we believe this will bring about substantial improvements in both the quality of care and treatment outcomes for persons with epilepsy in Egypt.</jats:p