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New phase transitions for formulas in Lukasiewicz logic

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Frontiers of Computer Science 2020年第6期14卷 197-199页

作者： mohamed el HALABY Areeg abdalla Department of Mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt

1 Introduction L-clausal forms is an interesting class of formulas in Eukasiewicz logic that was shown to be NP-complete[1].These formulas are defined over the following Lukasiewicz operations:negation-x=1-x strong di... 详细信息

关键词： formulas transitions Lukasiewicz

Effect of different metal sulfate precursors on structural and catalytic performance of zirconia in dehydration of methanol to dimethyl ether

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燃料化学学报 2018年第1期46卷 67-74页

作者： Abd el-Aziz A.said mohamed Abd el-Aal Chemistry Department Faculty of ScienceAssiut University71516 AssiutEgypt

ZrO_2 was treated with 10% SO_4^(2-) from different metal sulfate precursors for methanol dehydration to dimethyl *** the samples exhibited tetragonal phase and no diffraction peaks corresponding to metal sulfates or metal oxides were *** FT-IR results revealed that there were different interactions between sulfate and ZrO_2,and this had a great effect on the surface area of the *** catalytic activity was measured over the catalysts in the temperature range of 100-300 ℃.The results revealed that sulfated zirconia with CuSO_4·5 H_2O and Al_2(SO_4)_3·16 H_2O showed the best catalytic *** maximum yield of DME ≈87% was obtained over CuSZ at a reaction temperature of 275 ℃.Moreover,the catalytic activity of the catalysts was correlated well with their surface acidity that measured by dehydration of isopropanol.

关键词： MSO 4/ZrO2 甲醇脱水 DME

Pan-African high-grade metamorphism of southern Sinai, Egypt, fluid inclusion evidence

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Chinese Journal Of Geochemistry 2009年第4期28卷 358-363页

作者： mohamed el Tokhi abdalla Musallum Geology Department College of Science United Arab Emirates UniversityUnited Arab Emirates

Fluid inclusions in the leucosomes of Wadi Feiran migmatites showed that CO2, H2O and (H2O-CO2) fluids were likely to have been present when partial melting began in these rocks. Low salinity, aqueous fluid, to a lesser extent, CO2-rich fluids are the most abundant fluids. The present study suggests that high-density CO2 inclusions were formed at the earliest stage, while H2O inclusions were formed at the late stage. In an intermediate stage, low-density CO2 and H2O, CO2 inclusions were formed. At the early stage of uplift and during melt crystallization, the CO2-bearing vapour was trapped at grain boundaries. At the late stage of uplift, H2O released at the time of crystallization of the melt was trapped as inclusions.

关键词：流体包裹体西奈半岛变质作用埃及证据二氧化碳局部熔融熔体包裹体

Predictors of long-term survival after pancreaticoduodenectomy for peri-ampullary adenocarcinoma: A retrospective study of 5-year survivors

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 443-449页

作者： Ayman el Nakeeb mohamed el Sorogy Helmy Ezzat Rami said mohamed el Dosoky mohamed Abd el Gawad Ahmed M elsabagh Ehab el Hanafy Gastroenterology Surgical Center Mansoura University

Background: Pancreaticoduodenectomy(PD) is the standard curative treatment for periampullary tumors. The aim of this study is to report the incidence and predictors of long-term survival( ≥ 5 years) after PD. Methods: This study included patients who underwent PD for pathologically proven periampullary adenocarcinomas. Patients were divided into 2 groups: group(I) patients who survived less than 5 years and group(II) patients who survived ≥ 5 years. Results: There were 47(20.6%) long-term survivors( ≥ 5 years) among 228 patients underwent PD for periampullary adenocarcinoma. Patients with ampullary adenocarcinoma represented 31(66.0%) of the long-term survivors. Primary analysis showed that favourable factors for long-term survival include age < 60 years old, serum CEA < 5 ng/mL, serum CA 19-9 < 37 U/mL, non-cirrhotic liver, tumor size < 2 cm, site of primary tumor, postoperative pancreatic fistula, R0 resection, postoperative chemotherapy, and no recurrence. Multivariate analysis demonstrated that CA 19-9 < 37 U/mL [OR(95% CI) = 1.712(1.24 8–2.34 8), P = 0.001], smaller tumor size [OR(95% CI) = 1.335(1.032–1.726), P = 0.028] and R0 resection [OR(95% CI) = 3.098(2.095–4.582), P < 0.001] were independent factors for survival ≥ 5 years. The prognosis was best for ampullary adenocarcinoma, for which the median survival was 54 months and 5-year survival rate was 39.0%, and the poorest was pancreatic head adenocarcinoma, for which the median survival was 27 months and 5-year survival rate was 7%. Conclusions: The majority of long-term survivors after PD for periampullary adenocarcinoma are patients with ampullary tumor. CA 19-9 < 37 U/mL, smaller tumor size, and R0 resection were found to be independent factors for long-term survival ≥ 5 years.

关键词： Pancreatic carcinoma Pancreatic head carcinoma Pancreaticodudenectomy Long-term survival

Evaluation of urea breath test as a diagnostic tool for Helicobacter pylori infection in adult dyspeptic patients

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World Journal of Gastroenterology 2024年第17期30卷 2302-2307页

作者： Zeinab Nabil Ahmed said Asmaa mohamed el-Nasser Department of Medical Microbiology&Immunology Faculty of Medicine for Girls Al-Azhar UniversityNasr City 11754CairoEgypt

In this editorial,we discuss the article in the World Journal of *** article conducts a meta-analysis of the diagnostic accuracy of the urea breath test(UBT),a non-invasive method for detecting Helicobacter pylori(***)infection in *** is based on radionuclide-labeled *** methods,both invasive and non-invasive,are available for diagnosing *** infection,inclu-ding endoscopy with biopsy,serology for immunoglobulin titers,stool antigen analysis,and *** guidelines recommend UBTs as the primary choice for diagnosing *** infection and for reexamining after eradication *** is used to be the first choice non-invasive test due to their high accuracy,specificity,rapid results,and ***,its performance remains unaffected by the distribution of *** in the stomach,allowing a high flow of patients to be *** its widespread use,the performance characteristics of UBT have been inconsistently described and remain incompletely *** are two UBTs available with Food and Drug Administration approval:The 13C and 14C *** tests are affordable and can provide real-time *** may prefer the 13C test because it is non-radioactive,compared to 14C which uses a radioactive isotope,especially in young children and pregnant *** there was heterogeneity among the studies regarding the diagnostic accuracy of both UBTs,13C-UBT consistently outperforms the *** makes the 13C-UBT the preferred diagnostic ***,the provided findings of the meta-analysis emphasize the significance of precise considerations when choosing urea dosage,assessment timing,and measurement techniques for both the 13C-UBT and 14C-UBT,to enhance diagnostic precision.

关键词： Helicobacter pylori Urea breath test Diagnosis Diagnostic test accuracy Meta-analysis

Existence of Weak Solution for p(x)-Kirchhoff Type Problem Involving the p(x)-Laplacian-like Operator by Topological Degree

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Journal of Partial Differential Equations 2023年第2期36卷 203-219页

作者： el OUAARABI mohamed ALLALOU Chakir MelLIANI said Applied Mathematics and Scientific Computing Laboratory Faculty of Sciences and TechniquesSultan Moulay Slimane UniversityBeni MellalMorocco

In this paper,we study the existence of"weak solution"for a class of p(x)-Kirchhoff type problem involving the p(x)-Laplacian-like operator depending on two real parameters with Neumann boundary *** a topological degree for a class of demicontinuous operator of generalized(S_(+))type and the theory of the variable exponent Sobolev space,we establish the existence of"weak solution"of this problem.

关键词： p(x)-Kirchhoff type problem p(x)-Laplacian-like operator weak solution topological degree methods variable exponent Sobolev space

Mitigation of sulfate reducing Desulfovibrio ferrophilus microbiologically influenced corrosion of X80 using THPS biocide enhanced by Peptide A

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Journal of Materials Science & Technology 2022年第12期107卷 43-51页

作者： Junlei Wang Hongfang Liu Magdy el-said mohamed Mazen A.Saleh Tingyue Gu Department of Chemical and Biomolecular Engineering Institute for Corrosion and Multiphase TechnologyOhio UniversityAthensOH 45701USA School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China Research and Development Center Saudi Arabian Oil CompanyDhahran 31311Saudi Arabia

Tetrakis hydroxymethyl phosphonium sulfate(THPS) was enhanced by a 14-mer Peptide A, with its core12-mer sequence mimicking part of Equinatoxin II protein, in the mitigation of sulfate reducing Desulfovibrio ferrophilus MIC(microbiologically influenced corrosion) of X80 carbon steel. Results proved that50 ppm(w/w) THPS was sufficient to mitigate the D. ferrophilus biofilm, and its very agressive MIC(19.7mg/cm^(2) in 7 days or 1.31 mm/a), but not 20 ppm THPS. To achieve effective mitigation at a low dosage of THPS, biofilm-dispersing Peptide A was added to 20 ppm THPS in the culture medium. Sessile cell counts were reduced by 2-log and 4-log after enhancement by 10 ppb and 100 ppb Peptide A, respectively. Enhancement efficiency(further reduction in corrosion rate) reached 69% for 10 ppb Peptide A and 83% for100 ppb Peptide A compared with 20 ppm THPS alone treatment, indicating that Peptide A was a good biocide enhancer for THPS.

关键词： Microbiologically influenced corrosion Carbon steel Sulfate-reducing bacteria Biofilm Biocide

Deposition of Phosphate Nanoparticles onto Textile Fabrics via Sol-gel Method and Their Kinetics Desorption Studies

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Chemical Research in Chinese Universities 2020年第5期36卷 877-884页

作者： mohamed el MESSOUDI Aicha BOUKHRISS Laila SADALLAH Laila SAJID M'hamed el KOUALI said GMOUH Laboratory REMTEX ESITHHigher School of Textile and Clothing Industties(ESITH)Kni8Route d'EL JADIDACasablancaMorocco Laboratory LIN1AT Faculty of Sciences Ben M'SikHassan II University of CasablancaB.P 5366 KiaarifCasablancaMorocco Laboratory LCAPCM Faculty of Sciences Ben M'SikHassan II Universityof CasablancaB.P 5366 MaarifCasablancaMorocco Laboratory L3GIE Mohamntadia School of EngineersMohammad V UniversityBP.765 Av.Ibn SinaAgdalRabatMorocco Laboratory LEC Higher School of Textile and Clothing Industries(ESITH)Km 8Route d'EL JADIDACasablancaMorocco

In this paper,phosphate nanoparticles were coated on cotton(CO)and polyester(PES)textile surfaces by sol-gel method using tetraethylorthosilicate(TEOS)and chloropropyltriethoxysilane(CPTS)as silica *** deposited nanoparticles were observed with scanning electronic microscopy energv-dispersive X-ray spectroscopy(SEM-EDX).The release kinetics of phosphorus(P)from these textiles into the aqueous medium(Aq),acid(Ac),and basic(Ba)artificial sweats were then *** released amount of phosphorus was evaluated by the inductively coupled plasma(ICP)according to ISO NF EN 16711-2 *** results revealed that the release of P into the aqueous medium is lower than in the artificial *** kinetics data[the phosphoras desorption amount(mg/g)as a iunction of time]were modeled according to five models:the first order,the second order,the third order,simple elovich and parabolic *** suitable model was chosen based on the coefficient of determination(R2)and the calculation of the sum of the absolute errors(EABS),which describes the error between the theoretical and experimental *** observations were also carried out on the fabrics after desorption in order to show the impact of desorption on their ***,the impact of P release on the tensile strength of CO and PES fabrics was investigated using a uniaxial tensile *** thennal stability of all samples before and after desorption was assessed by thermogravimetric aiialysis(ATG).

关键词： Sol-gel Coating Kinetic Desorption Phospliate nanoparticle

Climate change impact and adaptation on wheat yield, water use and water use efficiency at North Nile Delta

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Frontiers of Earth Science 2020年第3期14卷 522-536页

作者： Marwa Gamal mohamed Ali Mahmoud mohamed Ibrahim Ahmed el Baroudy Michael Fullen el-said Hamad Omar Zheli Ding Ahmed Mohammed Saad Kheir Soil and Water Department Faculty of AgricultureTanta UniversityTanta33516Egypt Soils Water and Environment Research InstituteAgricultural Research CenterGiza12411Egypt Faculty of Science and Engineering The University of WolverhamptonWolverhamptonWV11LYUK Haikou Experimental Station Chinese Academy of Tropical Agricultural Sciences(CATAS)Haikou570000China

Investigation of climate change impacts on food security has become a global hot *** so,efforts to mitigate these issues in arid regions have been ***,in this paper,further research is discussed based on data obtained from various crop and climate *** DSSATcrop models(CMs)(CERESWheat and N-Wheat)were calibrated with two wheat cultivars(Gemiza9 and Misr1).A baseline simulation(1981-2010)was compared with different scenarios of simulations using three Global Climate Models(GCMs)for the 2030s,2050s and *** impacts of climate change were assessed using the GCMs and CMs under the high emission Representative Concentration Pathway(RCP8.5).Results predicted decreased wheat grain yields by a mean of 8.7%,11.4%and 13.2%in the 2030s,2050s and 2080s,respectively,relative to the baseline *** impacts of climatic change are probable,despite some uncertainties within the GCMs(i.e.,2.1%,5.0%and 8.0%)and CMs(i.e.,2.2%,6.0%and 9.2%).Changing the planting date with a scenario of plus or minus 5 or 10 days from the common practice was assessed as a potentially effective adaptation option,which may partially offset the negative impacts of climate *** the sowing date by 10 days(from 20 November to 30 November)proved the optimum scenario and decreased further reduction in wheat yields resulting from climate change to 5.2%,6.8%and 8.5%in the 2030s,2050s and 2080s,respectively,compared with the 20 November *** planting 5-days earlier scenario showed a decreased impact on climate change ***,the 10-days early planting scenario increased yield reduction under projected climate *** cultivar Misr1 was more resistant to rising temperature than *** the negative impacts of projected climate change on wheat production,water use efficiency would slightly *** ensemble of multi-model estimated impacts and adaptation uncertainties of climate change can assist decision-makers in planning clima

关键词： DSSAT models scenarios adaptation water use efficiency climate change