Optimal WAMS Configuration in Nordic Power System

Mohamed A.M. Hassan,Omar H. Abdalla,Hady H. Fayek,Aisha H.A. Hashim,Siti Fauziah Toha International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.3

The Smart grids are considered as multi-disciplinary power systems where the communication networks are highly employed. This paper presents optimal wide area measurement system (WAMS) configuration in Nordic power system. The transition from SCADA to WAMS becomes now trend in all power systems to ensure higher reliability and data visibility. The optimization applied in this research considered the geographical regions of the Nordic power system. The research considered all the devices of WAMS namely phasor measurement units (PMUs), phasor data concentrators (PDCs) and communication links. The study also presents two scenarios for optimal WAMS namely base case and N-1 contingency as different operating conditions. The result of this research presents technical and financial results for WAMS configuration in a real power system. The optimization results are performed using MATLAB 2017a software application.

Effect of Using Organic Acids to Substitute Antibiotic Growth Promoters on Performance and Intestinal Microflora of Broilers

Hassan, H.M.A.,Mohamed, M.A.,Youssef, Amani W.,Hassan, Eman R. Asian Australasian Association of Animal Productio 2010 Animal Bioscience Vol.23 No.10

A grower broiler experiment (from 14 to 35 days of age) was conducted to study the effect of using two commercial mixtures of organic acids (Galliacid$^{(R)}$ and Biacid$^{(R)}$) to substitute antibiotic growth promoter (Eneramycin$^{(R)}$) on performance, carcass characteristics and intestinal microflora. 400 (Ross 308) broiler chicks were used. A basal corn-soybean meal diet were formulated and served as a control treatment. The control diet was supplemented with either 0.06% Galliacid, 0.1% Biacid or 0.02% Eneramycin. Birds fed the Galliacid-supplemented diet had 16% (p<0.001) more gain than the control, while those fed the Biacid- or Enramycinsupplemented diets recorded 3 and 5.5% more gain, respectively. Organic acids mixtures and Enramycin supplementation significantly (p<0.001) improved feed conversion ratio. These results indicated that birds fed either organic acid mixtures or Enramycinsupplemented diets utilized feed more efficiently than those fed the control diet. Galliacid significantly (p<0.01) increased dressing percentage and bursa weight (% body weight). No significant differences were detected on liver, spleen and thymus (% body weight) among treatments. Galliacid or Biacid significantly (p<0.001) decreased intestinal Escherichia coli and Salmonella compared to the control and Enramycin-supplemented diets. Dietary Enramycin significantly (p<0.001) decreased Escherichia coli, but had no effect on Salmonella counts. In conclusion, organic acid mixtures are more efficient than antibiotic growth promoter (Enramycin) in improving broiler performance and decreasing intestinal Escherichia coli and Salmonella spp., and could be successfully used to substitute antibiotic growth promoters in broiler diets. However, not all of the organic acid mixtures gave the same effect either on performance or intestinal bacterial counts.

Oleuropein Induces Anti-metastatic Effects in Breast Cancer

Hassan, Zeinab K.,Elamin, Maha H.,Daghestani, Maha H.,Omer, Sawsan A.,Al-Olayan, Ebtesam M.,Elobeid, Mai A.,Virk, Promy,Mohammed, Osama B. Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9

Breast cancer causes death due to distant metastases in which tumor cells produce matrix metalloproteinase (MMP) enzymes which facilitate invasion. Oleuropein, the main olive oil polyphenol, has anti-proliferative effects. This study aimed to investigate the effect of oleuropein on the metastatic and anti-metastatic gene expression in the MDA human breast cancer cell line. We evaluated the MMPs and TIMPs gene expression by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR) in treated and untreated cells. This study demonstrated that OL may induce anti-metastatic effects on human breast cancer cells. We found that TIMP1,-3, and -4 were over-expressed after all periods of incubation in treated cancer cells compared to untreated cells, while MMP2 and MMP9 genes were down-regulated, at least initially. Treatment of breast cancer cells with oleuropein could help in prevention of cancer metastasis by increasing the TIMPs and suppressing the MMPs gene expressions.

Micro-grid Monitoring and Supervision: Web-based SCADA Approach

Ali Mohamed A.,Barakat Mahmoud M.,Abokhalaf Masoud M.,Fadel Yasmin H.,Kandil Mohamed,Rasmy Mariam W.,Ali Osama N.,Besheer Ahmad H.,Emara Hassan M.,Bahgat Ahmed 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5

Owing to the widespread use of the micro-grid concept to serve many real life applications, the main concern of this paper is to monitor, evaluate and manage the operational performance of an existent, already installed micro-grid that consists of On & Off grid PV systems in addition to the main grid supply. With the aid of customized web based SCADA system fully designed by authors, the performance evaluation of the proposed micro-grid is carried out in terms of energy consumption, power quality indices and energy cost based on Egypt’s energy current tariff . The designed system helps in both micro-grid status monitoring as well as load sharing between the main grid supply and the off grid PV energy system. The data of the on grid PV energy system are accessed and collected online directly from the inverter web server instead of downloading them offl ine from the PV inverter. In this case, data are analyzed with a reasonable refresh rate, which saves time and eff ort. Remote access platform is developed securely through a multi-level security authentication and strong data encryption using the OpenVPN protocol under the Dynamic Domain Name System service. Smart wired and wireless technology—used as integrated sensing devices to the developed SCADA system—enables easy system installation and running cost saving. Finally, to validate the collected data from the newly SCADA designed monitoring system, a performance characterization for the on grid PV system following international standards of yields calculations is carried out for 3 months in 2019.

Load Frequency Control of Power Systems with Sugeno Fuzzy Gain Scheduling PID Controller

Lokman H. Hassan,Haider A.F. Mohamed,M. Moghavvemi,S.S. Yang 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

This paper proposes a new Fuzzy Gain Scheduled Proportional, Integral and Derivative (FGPID) controller by using Takagi-Sugeno (TS) fuzzy system to the load frequency control problem in multi-area power systems. The TS fuzzy inference engine is chosen and the range of the controller is selected suitably to enhance the output performance of the system. Simulation results demonstrate the ability of the proposed control model in damping the frequency oscillations and tie line power deviations due to area load changes. The approach is compared against two controllers in the literature; Fuzzy Gain Scheduling Integral and Derivative (FGID) controller, and Fuzzy Gain Scheduling Proportional and Integral (FGPI) controller. Settling times, overshoots, undershoots and Integral Square Error (ISE) of frequency deviation are used as comparison criteria. Nonlinear simulation results show that the proposed controller provides better performance than the other two models.

Hierarchical composite catalysts of MCM-41 on zeolite Beta for conversion of heavy reformate to xylenes

Syed A. Ali,Faisal M. Almulla,B. Rabindran Jermy,Abdullah M. Aitani,Raed H. Abudawoud,Mohammed AlAmer,Ziyauddin S. Qureshi,Thamer Mohammad,Hassan S. Alasiri 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-

Hierarchical composites of MCM-41 on zeolite Beta were synthesized by in-situ hydrothermal technique,characterized and their catalytic performance for converting heavy reformate into valuable xylenes wasevaluated. Systematic optimization of the hierarchical pore generation was carried out by varying thestrength of the alkaline solution (0.10 0.45 M NaOH) during disintegration of zeolite Beta. Thenanocomposites obtained were extruded with alumina binder and impregnated with 4.0 wt% Mo. Thecharacterization results indicate the transition of mesophase occurs from distinct disordered phase toordered/disordered and then to ordered mesophase with increasing alkaline concentration. The xyleneyield over the hierarchical composite zeolite was 1.4 times more than the parent zeolite Beta. Incorporation of a well-dispersed mild hydrogenation function (4 wt.% Mo) was advantageous inimproving the xylene yield and selectivity. The formulation prepared with moderately alkaline (0.2 MNaOH) solution exhibited optimum bimodal pore structure and improved dealkylation and transalkylationconversion resulting in a xylene yield of 33.0 wt.% and 1.7 times enhancement in xyleneselectivity over parent zeolite Beta. A 30 h stability test showed steady performance and xylene yields. Hence, a potential application of hierarchical zeolite Beta and MCM-41 composite catalysts for theconversion of heavy aromatics to produce xylenes has been successfully demonstrated.

Behavior of concrete-filled double skin steel tube beam-columns

Maha M. Hassan,Ahmed A. Mahmoud,Mohammed H. Serror 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.22 No.5

Concrete-filled double skin steel tube (CFDST) beam-columns are widely used in industrial plants, subways, high-rise buildings and arch bridges. The CFDST columns have the same advantages as traditional CFT members. Moreover, they have lighter weight, higher bending stiffness, better cyclic performance, and have higher fire resistance capacities than their CFT counterparts. The scope of this study is to develop finite element models that can predict accepted capacities of double skin concrete-filled tube columns under the combined effect of axial and bending actions. The analysis results were studied to determine the distribution of stresses among the different components and the effect of the concrete core on the outer and inner steel tube. The developed models are first verified against the available experimental data. Accordingly, an extensive parametric study was performed considering different key factors including load eccentricity, slenderness ratio, concrete compressive strength, and steel tube yield strength. The results of the performed parametric study are intended to supplement the experimental research and examine the accuracy of the available design formulas.

Enhanced Onion Resistance against Stemphylium Leaf Blight Disease, Caused byStemphylium vesicarium, by Di-potassium Phosphate and Benzothiadiazole Treatments

Abo-Elyousr A. M. Kamal,Hussein M. A. Mohamed,Allam A. D. Aly,Hassan A. H. Mohamed 한국식물병리학회 2008 Plant Pathology Journal Vol.24 No.2

In this study, we investigated the induced defense response and protective effects against Stemphylium vesicarium by application of benzothiadiazole (Bion®) and di-potassium phosphate salt (K2HPO4) to onion. Onion leaves were sprayed with Bion® and K2HPO4, then inoculated 2 days later with a virulent strain of S. vesicarium under greenhouse conditions. Disease severity and activities of peroxidase (PO), polyphenoloxidase, phenylalanine ammonia-lyase (PAL) and phenol contents were evaluated in the treated leaf tissues. Reduction in the disease severity was observed in plants treated with Bion® and K2HPO4. Onion plants treated with Bion® and K2HPO4 and inoculated with the pathogen showed significantly higher PAL activity, PO activity, and phenol contents than inoculated water-treated plants 2 days after the treatment. In conclusion, the results of this study provide evidence that application of simple non-toxic chemical solutions as di-potassium phosphate and Bion® can control Stemphylium leaf blight of onion.

Enhanced Onion Resistance against Stemphylium Leaf Blight Disease, Caused by Stemphylium vesicarium, by Di-potassium Phosphate and Benzothiadiazole Treatments

Kamal, Abo-Elyousr A.M.,Mohamed, Hussein M.A.,Aly, Allam A.D.,Mohamed, Hassan A.H. The Korean Society of Plant Pathology 2008 Plant Pathology Journal Vol.24 No.2

In this study, we investigated the induced defense response and protective effects against Stemphylium vesicarium by application of benzothiadiazole ($Bion^{(R)}$) and di-potassium phosphate salt $(K_2HPO_4)$ to onion. Onion leaves were sprayed with $Bion^{(R)}$ and $K_2HPO_4$, then inoculated 2 days later with a virulent strain of S. vesicarium under greenhouse conditions. Disease severity and activities of peroxidase (PO), polyphenoloxidase, phenylalanine ammonia-lyase (PAL) and phenol contents were evaluated in the treated leaf tissues. Reduction in the disease severity was observed in plants treated with $Bion^{(R)}$ and $K_2HPO_4$. Onion plants treated with $Bion^{(R)}$ and $K_2HPO_4$ and inoculated with the pathogen showed significantly higher PAL activity, PO activity, and phenol contents than inoculated water-treated plants 2 days after the treatment. In conclusion, the results of this study provide evidence that application of simple non-toxic chemical solutions as di-potassium phosphate and $Bion^{(R)}$ can control Stemphylium leaf blight of onion.

Response of Triple Negative Breast Cancer to Neoadjuvant Chemotherapy: Correlation between Ki-67 Expression and Pathological Response

Elnemr, Gamal M,El-Rashidy, Ahmed H,Osman, Ahmed H,Issa, Lotfi F,Abbas, Osama A,Al-Zahrani, Abdullah S,El-Seman, Sheriff M,Mohammed, Amrallah A,Hassan, Abdelghani A Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.2

Triple-negative breast cancers constitute about 15% of all cases, but despite their higher response to neoadjuvant chemotherapy, the tumors are very aggressive and associated with a poor prognosis as well as a higher risk of early recurrence. This study was retrospectively performed on 101 patients with stage II and III invasive breast cancer who received 6-8 cycles of neo-adjuvant chemotherapy. Out of the total, 23 were in the triple negative breast cancer subgroup. Nuclear Ki-67 expression in both the large cohort group (n=101) and triple negative breast cancer subgroup (n=23) and its relation to the pathological response were evaluated. The purpose of the study was to identify the predictive value of nuclear protein Ki-67 expression among patients with invasive breast cancers, involving the triple negative breast cancer subgroup, treated with neoadjuvant chemotherapy in correlation to the rate of pathological complete response. The proliferation marker Ki-67 expression was highest in the triple negative breast cancer subgroup. No appreciable difference in the rate of Ki-67 expression in triple negative breast cancer subgroup using either a cutoff of 14% or 35%. Triple negative breast cancer subgroup showed lower rates of pathological complete response. Achievement of pathological complete response was significantly correlated with smaller tumor size and higher Ki-67 expression. The majority of triple negative breast cancer cases achieved pathological partial response. The study concluded that Ki-67 is a useful tool to predict chemosensitivity in the setting of neoadjuvant chemotherapy for invasive breast cancer but not for the triple negative breast cancer subgroup.