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Capacitance of Vertical Parallel Junction Silicon Solar Cell under Monochromatic Modulated Illumination

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Journal of Applied Mathematics and Physics 2015年第11期3卷 1536-1543页

作者： Gokhan Sahin Moustapha Dieng Mohamed Abderrahim Ould el Moujtaba Moussa Ibra Ngom Amary Thiam Grégoire Sissoko Physics Department Faculty of Sciences and Techniques University of Cheikh Anta Diop Dakar Senegal

The aim of this study is to show the influence of the wavelength on the electrical parameters of vertical parallel junction silicon solar cell by use of impedance spectroscopy technique. The Bode diagrams of the diffusion capacitance are shown for different wavelengths while the solar cell operates under both open circuit and short circuit conditions. The Nyquist diagram of the diffusion capacitance has shown the extension of the space charge region for various wavelengths.

关键词： Vertical Parallel Junction Wavelength Capacitance Bode and Nyquist Diagrams

Angiogenic and FLT3 Receptors Expression in Acute Lymphoblastic Leukemia in Pediatric Age Group

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Journal of Cancer Therapy 2019年第6期10卷 442-457页

作者： Mona Hilmy Alrayes Reham Hammad Mohamed Abd Alazim Hussein el Baddiny Maha Saleh Madbouly Ibrahim Mahmoud Hammad Clinical Pathology Department Faculty of Medicine (for Girls) Al-Azhar University Cairo Egypt Clinical Pathology Department National Cancer Institute Cairo University Cairo Egypt Department of Pediatric Oncology National Cancer Institute Cairo University and Children’s Cancer Hospital Egypt Cairo Egypt

Angiogenesis has an important role in pathophysiology of cancer. FMS-like tyrosine kinase 3 (FLT3) is implicated in hematopoietic malignancies. Their role in childhood acute lymphoblastic leukemia (ALL) pathogenesis needs more enlightenment. Expression of vascular endothelial growth factor receptor-1 and -2 (VEGFR-1 and -2), as well as FLT3 were assessed by flow cytometry in bone marrow (BM) blasts of 55 newly diagnosed children with ALL. Patients included B cell ALL (B-ALL) group (n = 41) and T cell ALL (T-ALL) group (n = 14). Comparison between groups revealed a significant increase in blasts percent (%) expressing FLT3 and FLT3 intensity detected in B-ALL group (p = 0.004 and p = 0.02, respectively). In B-ALL patients, a significant positive correlation was seen between blasts % expressing FLT3 and blasts percentage infiltrating BM (r = 0.405;p = 0.009), also positive correlation was seen between % of blasts expressing VEGFR-1 and VEGFR-2 (r = 0.704;p 0.001). In T-ALL group, blast % expressing FLT3 revealed significant positive correlations with blast % expressing VEGFR-1, and those expressing VEGFR-2 (r = 0.627;p = 0.016, and r = 0.654;p = 0.011, respectively). In addition, significant correlation was seen in blasts % expressing all;FLT3, VEGFR-1 and -2, with blasts % expressing stem cell marker CD34 (r = 0.826;p = 0.001, r = 0.596;p = 0.041, and r = 0.798;p = 0.002, respectively). Conclusion: Expression of VEGFR-1, VEGFR-2 and FLT3 were demonstrated and linked on leukemic blasts of ALL which highlights their role in pathogenesis. FLT3 expression plays a role in facilitating blasts proliferation in BM in B-ALL. FLT3, VEGFR-1 and -2 could be used in future profiling of CD34+ leukemic stem cell pool in T-ALL.

关键词： Childhood Leukemia Angiogenesis Vascular Endothelial Growth Factor Receptors FLT3 Acute Lymphoblastic Leukemia

Study of the Intrinsic Recombination Velocity at the Junction of Silicon Solar under Frequency Modulation and Irradiation

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Journal of Applied Mathematics and Physics 2015年第11期3卷 1522-1535页

作者： el Hadji Ndiaye Gokhan Sahin Moustapha Dieng Amary Thiam Hawa Ly Diallo Mor Ndiaye Grégoire Sissoko Laboratory of Semiconductors and Solar Energy Physics Department Faculty of Science and Technology University Cheikh Anta Diop Dakar Senegal

In this study, a method for determining the intrinsic recombination velocity at the junction of a silicon solar cell is presented. The expression of intrinsic recombination velocity at the junction was established under irradiation in frequency modulation. Based on this expression, an electrical model of the intrinsic recombination velocity at the junction is presented.

关键词： Silicon Solar Cell Frequency Modulation Intrinsic Recombination Velocity at the Junction Irradiation Energy

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泡沫稳定性及消泡方法的实验研究

泡沫稳定性及消泡方法的实验研究

作者：亚尔巴（Yarbane el Houssein）吉林大学

学位级别：硕士

泡沫技术在石油工业中获得了广泛的应用,解决了以前很多常规作业所不能解决的技术难题,取得了较大的经济效益。泡沫的稳定性是泡沫的主要性能,随着泡沫的应用领域不断被认识,对该题的研究将越来越受到重视,本文选择了常见的评价泡沫性... 详细信息

泡沫技术在石油工业中获得了广泛的应用,解决了以前很多常规作业所不能解决的技术难题,取得了较大的经济效益。泡沫的稳定性是泡沫的主要性能,随着泡沫的应用领域不断被认识,对该题的研究将越来越受到重视,本文选择了常见的评价泡沫性能的一种方法(Waring Blender法),该方法用泡沫半衰期和泡沫体积来表征泡沫剂的稳定性和起泡能力,采用搅拌法,确定了泡沫剂SDS和稳泡剂CMC-H的最佳浓度,给出了泡沫配方,并对该配方进行了耐温试验。泡沫钻进生产中可能带来不少麻烦,例如在实际生产中,现有的消泡器不能很好地达到消泡的要求。本文进一步研究消泡器特别是贮能管、垫片厚度、消泡压力对消泡能力的影响。通过对大量测试数据的分析,对消泡理论进行研究,确定了消泡器设计的结构参数。

关键词：泡沫稳定性消泡器温度钻进

Effect of sustained virological response on long-term clinical outcome in 113 patients with compensated hepatitis C-related cirrhosis treated by interferon alpha and ribavirin

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World Journal of Gastroenterology 2007年第42期13卷 5648-5653页

作者： Roland el Braks Nathalie Ganne-Carrié Hélène Fontaine Jacques Paries Véronique Grando-Lemaire Michel Beaugrand Stanislas Pol Jean-Claude Trinchet Department of Hepatology Hopital Jean Verdier (AP-HP) and UPRES EA 3409 (University Paris 13) Bondy 93140 France Department of Hepatology Hopital Cochin (AP-HP) and University Paris 5 Paris 75014 France Department of Public Health Jean Verdier Hospital (AP-HP) and UPRES EA 3409 (University Paris 13) Bondy 93140 France

AIM： To assess the long-term clinical benefit of sustained virological response （SVR） in patients with hepatitis C virus （HCV） cirrhosis treated by antiviral therapy using mostly ribavirin plus interferon either standard or ***： One hundred and thirteen patients with uncomplicated HCV biopsy-proven cirrhosis, treated by at least one course of antiviral treatment ≥ 3 mo and followed ≥ 30 mo were included. The occurrence of clinical events [hepatocellular carcinoma （HCC）, decompensation and death] was compared in SVR and non SVR ***： Seventy eight patients received bitherapy and 63 had repeat treatments. SVR was achieved in 37 patients （33%）. During a mean follow-up of 7.7 years, clinical events occurred more frequently in non SVR than in SVR patients, with a significant difference for HCC （24/76 vs 1/37, P = 0.01）. No SVR patient died while 20/76 non-SVR did （P = 0.002）, mainly in relation to HCC （45%）.CONCLUSION： In patients with HCV-related cirrhosis, $VR is associated with a significant decrease in the incidence of HCC and mortality during a follow-up period of 7.7 years. This result is a strong argument to perform and repeat antiviral treatments in patients with compensated cirrhosis.

关键词： Hepatitis C Cirrhosis Interferon alpha

Assessment of Total Incapacity for Work or Incapacity in the Criminal Sense in Case of Penetrating Wounds of the Neck

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Forensic Medicine and Anatomy Research 2018年第1期6卷 1-9页

作者： el Hadji Oumar Ndoye Bobo Diallo Sidy Ahmed Dia Mouhamed Manibiliot Soumah Mame Coumba Fall Mor Ndiaye Department of Forensic and Labor Medicine University Cheikh Anta Diop (UCAD) Dakar Senegal ENT Department of the University Hospital Center of Fann Dakar Senegal

Penetrating wounds of the neck are often life-threatening. The victims are exposed to vascular and laryngotracheal lesions. The purpose of this work is to report the various aspects of the management of penetrating wounds in our context and to make the medico-legal assessment of incapacity in the criminal sense or total incapacity for work. This is a retrospective study (2002-2014) on thirty-nine (39) cases of penetrating neck wounds, received at the ENT departments of the Aristide Le Dantec and Fann University Hospital Centers. Patients were predominantly male, representing 94% of cases with an average age of 27 years. Seventy (70%) of the accidents occurred in the region of Dakar. In 42% of cases, the circumstance of occurrence was a fight or an assault. The weapon used in most cases by the aggressor was a cutter or a knife. The average waiting time was 37 hours with extremes of 02 and 216 hours. Surgically, all patients had been examined under general anesthesia. In terms of lesions, 37 cases had profound cervical muscle injuries, i.e. 94%. There were 17 vascular lesions (43%). The medico-legal distribution of patients showed that among them, 10% had a total incapacity to work exceeding 21 days. The determination of total incapacity for work is an important medical procedure that requires capability and experience. The doctor must not fall into the trap of the confusion between the TIW on the criminal level and the TIW on the civil level. He must limit medically and should not make judgments.

关键词： Penetrating Neck Wounds Assessment of Total Incapacity for Work Criminal Incapacity Forensic Medicine

Interactive Effects of Drought Stress and Phytohormones or Polyamines on Growth and Yield of Two M(<i>Zea maize</i>L) Genotypes

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American Journal of Plant Sciences 2011年第6期2卷 790-807页

作者： M. A. K. Shaddad M. Hamdia Abd el-Samad H. T. Mohammed 不详

Two maize genotypes (Nefertiti and Bashaier) were picked up from nine maize genotypes during the early vegetative growth (25 days) to be cultivated in open field upon the crop yield under the different drought stress levels (90,70,50,30) or under the interaction effect of drought stress and phytohormones or polyamines. According to the data of growth criteria, the maize genotype Nefertiti was found to be the most drought sensitive genotype, while the genotype Bashaier was found to be the most drought resistant genotype. Additionally while the photosynthetic pigments remained more or less unchanged in genotype Bashaier, their biosynthesis destroyed earlier in the drought sensitive genotype (Nefertiti). Also while the genotype Bashaier absorbed and accumulated a sufficient amount of mono and divalent cations (K+, Ca++ and Mg++), the genotype Nefertiti did not. Accordingly while the genotype Bashaier gave a crop yield up to 50% field capacity, the genotype Nefertiti gave a crop yield only up to 70% field capacity and failed to give a crop yield beyond this level. The interaction effect of drought stress and phytohormones and polyamines improved the all above characteristics. Interestingly each of these activators considerably improved the production of crop yield only in genotype Bashaier specially polyamines they produced more than 60% field capacity and at the level of 30% field capacity (the level which did not give crop yield in this genotype). However, phytohormones in generally did not make an important effect on the crop yield in genotype Nefertiti although they improved the dry matter production during the vegetative stages. Such situation seemed to be complicated and borne many questions to be studied in the future.

关键词： Drought Maize (Zea maize L.) Phytohormones Polyamines Leaf Area Dry Weight Yield

Statistical Time Series Forecasting Models for Pandemic Prediction

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Computer Systems Science & Engineering 2023年第10期47卷 349-374页

作者： Ahmed elShafee Walid el-Shafai Abeer D.Algarni Naglaa F.Soliman Moustafa H.Aly Department of electrical Engineering Faculty of EngineeringAhram Canadian University6th October CityGizaEgypt Security Engineering Lab Computer Science DepartmentPrince Sultan UniversityRiyadh11586Saudi Arabia Department of electronics and electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia electronics and Communications Engineering Department College of Engineering and TechnologyArab Academy for ScienceTechnology and Maritime TransportAlexandria1029Egypt

COVID-19 has significantly impacted the growth prediction of a pandemic,and it is critical in determining how to battle and track the disease *** this case,COVID-19 data is a time-series dataset that can be projected using different ***,this work aims to gauge the spread of the outbreak severity over ***,data analytics and Machine Learning(ML)techniques are employed to gain a broader understanding of virus *** have simulated,adjusted,and fitted several statistical time-series forecasting models,linearML models,and nonlinear ML *** of these models are Logistic Regression,Lasso,Ridge,elasticNet,Huber Regressor,Lasso Lars,Passive Aggressive Regressor,K-Neighbors Regressor,Decision Tree Regressor,Extra Trees Regressor,Support Vector Regressions(SVR),AdaBoost Regressor,Random Forest Regressor,Bagging Regressor,AuoRegression,MovingAverage,Gradient Boosting Regressor,Autoregressive Moving Average(ARMA),Auto-Regressive Integrated Moving Averages(ARIMA),SimpleExpSmoothing,Exponential Smoothing,Holt-Winters,Simple Moving Average,Weighted Moving Average,Croston,and naive ***,our suggested methodology includes the development and evaluation of ensemble models built on top of the best-performing statistical and ML-based prediction methods.A third stage in the proposed system is to examine three different implementations to determine which model delivers the best ***,this best method is used for future forecasts,and consequently,we can collect the most accurate and dependable predictions.

关键词： Forecasting COVID-19 predictive models medical viruses mathematical model market research diseases

Typology of the Main Fungal Diseases Affecting Winter Wheat in the Grand Duchy of Luxembourg

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Journal of Agricultural Science and Technology(A) 2012年第12期2卷 1386-1399页

作者： Moussa el Jarroudi Louis Kouadio Philippe Delfosse Frederic Giraud Jurgen Junk Lucien Hoffmann Henri Maraite Bernard Tychon Department of Environmental Sciences and Management University of Liege Arlon Campus Environnement 185 Avenue deLongwy Arlon 6700 Belgium Environment and Agro-biotechnologies Department Centre de Recherche Public-Gabriel Lippmann 41 Rue du Brill Belvaux4422 Luxembourg BIOR1ZON-STAPHYT site Montesquieu Rue Magendie Bordeaux Martillac 33650 France Earth and Life Institute University catholique de Louvain Croix du Sud 2/3 Louvain-la-Neuve 1348 Belgium

Over the 2003-2009 period, field campaigns were carried out in order to identify the main fungal diseases of winter wheat （Triticum aestivum） in the Grand-Duchy of Luxembourg. Four fungal diseases （septoria leaf blotch （SLB）, wheat leaf rust （WLR）, wheat powdery mildew （WPM） and fusarium head blight （FHB）） were observed and a regional-based typology was established according to their severity and prevalence. In the Gutland （South）, SLB severity was strong （about 51% on average） and higher than the severity （about 16%） prevailing in the Oesling （North）. Similar typology was observed with the WLR： high severity in the Gutland （66% and 57% for the years 2003 and 2007, respectively） and low severity （〈 1%） in the Oesling. The FHB was also present in the Eastern part of the Gutland, with a prevalence and severity significantly higher （P = 0.049 and P = 0.012, respectively, Tukey＇s test） compared with their values in the Oesling. On the other hand, the WPM severity was high in the Oesling （15% to 40%） while less than 1% in the Gutland. Such a study is important for the spatial mapping of wheat fungal diseases risk based on agroclimatic parameters and for defining optimal frequencies and dates of chemical treatments.

关键词： Winter wheat septoria leaf blotch wheat leaf rust fusarium head blight powdery mildew disease severity mapping.