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Three dimensional hydrodynamic modeling over bed forms in open channels

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International Journal of Sediment Research 2010年第4期25卷 431-440页

作者： K.EL KHEIASHY J.MCCORQUODALE I.georgiou E.MESELHE Kellogg Brown and Root Inc. (KBR) 4100 Clinton Drive 03-1130 Houston TX 77020 USA Civil and Environmental Engineering Department University of New Orleans New Orleans LA 70148 USA Earth and Environmental Sciences Department University of New Orleans New Orleans LA 70148 USA Civil Engineering Department University of Louisiana at Lafayette Lafayette LA 70504USA

Three dimensional numerical modeling ofidealized sand dunes was used to assess the capability of various modeling formulations to capture the flow structure and resistance introduced by bed forms which are similar to those in the Lower Mississippi River. The selected models were: ECOMSED (HydroQual), MIKE 3 [Danish Hydraulic Institute (DHI)] and H3D (Hayco). The study revealed that the hydrostatic versions of models did not capture the flow separation at the crest of the dunes; however, they did respond to the presence of bed forms and gave a total resistance similar to the nonhydrostatic models.

关键词： Bed forms Alluvial rivers Three dimensional models Mississippi river

A Global Solution of the Einstein-Maxwell Field Equations for Rotating Charged Matter

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Journal of Modern Physics 2012年第9期3卷 1301-1310页

作者： Andreas georgiou School of Physics Astronomy and Mathematics University of Hertfordshire Hatfield UK

A stationary axially symmetric exterior electrovacuum solution of the Einstein-Maxwell field equations was obtained. An interior solution for rotating charged dust with vanishing Lorentz force was also obtained. The two spacetimes are separated by a boundary which is a surface layer with surface stress-energy tensor and surface electric 4-current. The layer is the spherical surface bounding the charged matter. It was further shown, that all the exterior physical quantities vanished at the asymptotic spatial infinity where spacetime was shown to be flat. There are two different sets of junction conditions: the electromagnetic junction conditions, which were expressed in the traditional 3-dimensional form of classical electromagnetic theory;and the considerably more complicated gravitational junction conditions. It was shown that both—the electromagnetic and gravitational junction conditions—were satisfied. The mass, charge and angular momentum were determined from the metric. Exact analytical formulae for the dipole moment and gyromagnetic ratio were also derived. The conditions, under which the latter formulae gave Blackett’s empirical result for rotating stars, were investigated.

关键词： Gravitation Exact Solutions Einstein-Maxwell Equations Rotation Charged Dust

The Angular Momenta Dipole Moments and Gyromagnetic Ratios of the Electron and the Proton

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Journal of Modern Physics 2014年第14期5卷 1254-1257页

作者： A. georgiou School of Physics Astronomy and Mathematics University of Hertfordshire Hatfield UK

We had previously obtained analytical formulae for the dipole moments and angular momenta of rotating spherical bodies. The resulting formulae were applied to the Sun, the star 78 Virginis and the Earth. The agreement of the theoretical formulae with the actual real situations is indeed remarkable. In this note we apply the same formulae to the electron and the proton, using the classical values of the radii, so no quantum mechanical treatment is considered.

关键词： Angular Momenta Dipole Moments Electron Proton

The Angular Momenta, Dipole Moments and Gyromagnetic Ratios of the Neutron and the Muon

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Journal of Modern Physics 2015年第7期6卷 1004-1006页

作者： Andreas georgiou School of Physics Astronomy and Mathematics University of Hertfordshire Hatfield UK

The dipole moments, angular momenta and gyromagnetic ratios of the electron and the proton were obtained earlier. In this note, we derive the corresponding expressions for the neutron and the muon. This work relies on... 详细信息

关键词： Angular Momenta Dipole Moments Neutron Muon

Reviewing the Puzzle of CLIL

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基础教育外语教学研究 2020年第12期 27-32页

作者： Sophie Loannou georgiou 不详

Content and language integrated learning(CLIL)has become a well-knownterm for foreign language teachers and language researchers.A little more than a decade ago,it was a term unheard of in most staff rooms orprofessional *** paper seeks to define CLIL and to look into thereasons that have propelled it to widespread *** successfactors of CLIL programmes will be presented,as well as research resultsrelating to its ***,concerns about CLIL will be addressed and away forward for the approach will be roughly sketched.

关键词： CLIL has hear

Reviewing the Puzzle of CLIL

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基础教育外语教学研究 2013年第4期 33-40页

作者： Sophie Ioannou georgiou

Content language integrated learning (CLIL) has become a well-known term for foreign language teachers and language researchers.A little more than a decade ago,it was a term unheard of in most staff rooms or professional *** paper seeks to define CLIL and to look into the reasons that have propelled it to widespread *** success factors of CLIL programmes will be presented,as well as research results relating to its ***,concerns about CLIL will be addressed and a way forward for the approach will be roughly sketched.

关键词：基础教育外语教学英语学习方法

Effect of bombesin and neurotensin on gut barrier function in partially hepatectomized rats

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World Journal of Gastroenterology 2005年第43期11卷 6757-6764页

作者： Stelios F Assimakopoulos Ilias H Alexandris Chrisoula D Scopa Panagiotis G Mylonas konstantinos C Thomopoulos Christos D georgiou Vassiliki N Nikolopoulou Constantine E Vagianos Department of Internal Medicine Department of Surgery Department of Pathology Department of Internal edicine Department of Biology

AIM: To investigate the effect of regulatory peptides bombesin (BBS) and neurotensin (NT) on intestinal barrier function in partially hepatectomized ***: Ninety male Wistar rats were randomly divided into five groups: Ⅰ (n = 10): controls, Ⅱ (n =20): sham operated, Ⅲ (n = 20): partial hepatectomy 70% (PHx), Ⅳ (n = 20): PHx+BBS (30 μg/kg/d), Ⅴ (n= 20): PHx+NT (300 μg/kg/d). Groups Ⅳ and Ⅴ were treated for 8 days before PHx and 48 h post *** the end of the experiment, on day 10, intestinal barrier function was assessed by measuring endotoxin concentrations in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and villus density, mucosal thickness, mitotic activity and apoptosis in crypts were assessed. In addition, ileal mucosa was analyzed for DNA and protein content and microbiological analysis was performed in cecal *** estimate intestinal oxidative stress, lipid peroxidation was determined on tissue homogenates from terminal ***: BBS or NT administration significantly reduced portal and systemic endotoxemia observed 48 h after partial hepatectomy. In hepatectomized rats (group Ⅲ), a trend towards induction of mucosal atrophy was observed, demonstrated by the reduction of villus density, mucosal thickness, protein content and significant reduction of DNA, while these alterations were reversed by regulatory peptides *** trophic effect of BBS and NT was accompanied by induction of mitoses above control levels and a significant reduction of apoptosis in intestinal *** lipid peroxidation was found significantly lower in PHx group and regulatory peptides exerted an antioxidant action, further decreasing this parameter of oxidative stress. The bacterial population of E. coli and aerobic Gram (+) cocci was increased in cecal content of hepatectomized rats, while this parameter was not affected by the administration of BBS or ***: Gut regulatory peptides BBS a

关键词：神经加压素肠阻塞肝脏切除术小鼠动物实验

Severe Thyrotoxicosis Does Not Accelerate 1a-Hydroxylation of 25-Hydroxyvitamin D3 in Dogs. Experimental Study

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International Journal of Clinical Medicine 2013年第12期4卷 539-542页

作者： Christos georgiou Velentzas Toronto Western Hospital Toronto Canada University of Athens Athens Greece

Two healthy dogs weighing 18 kg and 13 kg each received an intravenous injection of 7 μg/kg 25-hydroxyvitamin D3 (25OHD3). Subsequently, they were blood-sampled in order to determine the plasma levels of 25(OH)D3 over 4-hourly time intervals and for a time period of 24 hours. After a period of 18 days since the last blood sampling, the animals were brought to a hyperthyroid state and the intravenous injection of 7 μg/kg 25OHD3 was repeated. Blood sampling was performed every 4 hours and over a time period of 24 hours in order to determine the levels of 25OHD3. The graphic plotting of plasma levels of 25OHD3 in the euthyroid state did not differ from that in the hyperthyroid state. This finding in dog animal experimentation is indicative that the increased levels of thyroid hormones did not affect the activity of CYP27B1 and CYP24A1 enzymes that are related to the catabolism of 25OHD3 over a minimum of 24 hours period.

关键词： Thyrotoxicosis Vitamin D Dogs

PASS认知过程：能够解释RAN-阅读之间的关系吗？(英文)

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心理科学 2010年第6期33卷 1291-1298页

作者： George K.georgiou 邓赐平 Department of Educational psychology University of Alberta

本研究考察了计划、注意、同时性加工和继时性加工这些PASS认知技能,在多大程度上能够预测快速命名和单词阅读之间的共同变异量。84位说英语读三年级和四年级的加拿大儿童,接受了客体和颜色快速命名、单词确认、计划、注意、同时性加工... 详细信息

本研究考察了计划、注意、同时性加工和继时性加工这些PASS认知技能,在多大程度上能够预测快速命名和单词阅读之间的共同变异量。84位说英语读三年级和四年级的加拿大儿童,接受了客体和颜色快速命名、单词确认、计划、注意、同时性加工和继时性加工任务的测量。结果表明,计划和继时性加工能够对快速命名和阅读之间的共同变异量做出显著的解释。这一结果表明,在探寻快速阅读与阅读密切关联的原因时,应充分考虑这两个认知过程。

关键词：快速命名速度单词阅读计划继时性加工加拿大原住民