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Effects of magnetic field on photon-induced quantum transport in a single dot-cavity system

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Chinese Physics B 2016年第11期25卷 270-274页

作者： Nzar Rauf Abdullah Aziz H fatah Jabar M A fatah Physics Department College of Science University of Sulaimani Science Institute University of Iceland

In this study,we show how a static magnetic field can control photon-induced electron transport through a quantum dot system coupled to a photon *** quantum dot system is connected to two electron reservoirs and exposed to an external perpendicular static magnetic *** propagation of electrons through the system is thus influenced by the static magnetic and the dynamic photon *** is observed that the photon cavity forms photon replica states controlling electron transport in the *** the photon field has more energy than the cyclotron energy,then the photon field is dominant in the electron ***,the electron transport is enhanced due to activation of photon replica *** contrast,the electron transport is suppressed in the system when the photon energy is smaller than the cyclotron energy.

关键词： photon connected reservoirs zigzag suppressed perpendicular exposed spacing Hamiltonian confinement

Analytical Study of Ground Painting Layers and Conservation Processes of an Egyptian Painted Coffin

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Journal of Life Sciences 2011年第8期5卷 661-669页

作者： Hala Afifi Mahmood Mostafa Ahmed abde1 fatah Conservation and Restoration Department Faculty of Archaeology Cairo University Giza Cairo 12613 Egypt Supreme Council of Antiquities Cairo 12613 Egypt

The aim of this study is to examine and present the results of the scientific examinations carried out on the ground layers with paint samples collected from the decorated surfaces of the wooden coffin dated back to the late period from Saqqara excavation that belonged to the Ministry of Antiquities. Many analytical methods were performed as optical microscopy, scanning electron microscopy coupled with energy-dispersive X-ray analysis （ESEM-EDX）, X-ray diffraction analysis as well as fourier transform infrared spectroscopy have been used to both characterise the inorganic composition and the binding media used. The analytical results showed that the materials composition and technique used to plaster applied on the wooden surface are in good agreement with the information gathered through the historical survey. The coffin was in bad and poor condition. There was cracking on the surface and in the structure, serious flaking, cupping of some pigments and serious damage in both the wooden support and gesso layer. Conservation treatment processes carried out included consolidation of lifting areas of the paint film, disturbing restoration materials, repair of cracks in the wooden support and a dry surface cleaning of the pigments.

关键词： Wooden coffin pigments Saqqara EDX SEM conservation chemical composition deterioration aspect.

Analytical Derivations of Single-Particle Matrix Elements in Nuclear Shell Model

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Communications in Theoretical Physics 2016年第7期65卷 104-114页

作者： Aziz H.fatah R.A.Radhi Nzar R.Abdullah Physics Department Faculty of Science and Science Education School of Science University of Sulaimani Physics Department College of Science University of Baghdad Science Institute University of Iceland

We present analytical method to calculate single particle matrix elements used in atomic and nuclear physics. We show seven different formulas of matrix elements of the operator f(r)d_r^m where f(r) = r~μ, r~μjJ(qr), V(r)corresponding to the Gaussian and the Yukawa potentials used in nuclear shell models and nuclear structure. In addition,we take into account a general integral formula of the matrix element 〈 n′ l′|f(r) d_r^(m) |n l〉 that covers all seven matrix elements obtained analytically.

关键词： nuclear structure shell model nuclear matrix elements and nuclear structure

Model-based adaptive controller for personalized ventilation and thermal comfort in naturally ventilated spaces

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Building Simulation 2021年第6期14卷 1757-1771页

作者： dalia Ghaddar Mariam Itani Nesreen Ghaddar Kamel Ghali Joseph Zeaiter Mechanical Engineering Department American University of BeirutP.O.Box 11-0236Beirut 1107-2020Lebanon Mechanical Engineering Department Phoenicia UniversityDistrict of ZahraniLebanon Bahaa and Walid Bassotne Department of Chemical Engineering and Advanced Energy American University of BeirutBeirutLebanon

This work develops a standalone autonomously controlled personalized ventilation(PV)unit in a naturally ventilated(NV)office space to maintain acceptable thermal comfort{TQ under steady and transient indoor conditions and activity *** NV-PV proportional integral derivative(PID)controller adjusts the PV supply temperature(7spv)at the occupant set flow rate(Qspv)based on predicted TC using a regression *** target TC level that the controller attains at all times is between 0(neutral)and 1(slightly comfortable).Process transfer functions were developed and then used to find the adaptive PID tuning coefficients using the Internal Model Control(IMC)*** controller was tested in a case study at indoor temperature range of 25 to 33℃ with relative humidity range of 55%and 80%.It was shown that the NV-PV controller adjusted Tspv to maintain acceptable TC under transients of indoor conditions and metabolic rates.

关键词： adaptive PID controller personalized ventilation natural ventilation thermal comfort

Effects of La_(2)O_(3) addition on microstructure development and physical properties of harder ZTA-CeO_(2) composites with sustainable high fracture toughness

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Journal of Rare Earths 2021年第7期39卷 844-849,I0003页

作者： Zhwan Dilshad Ibrahim Sktani Nik Akmar Rejab Abdul fatah Zulkarnain Rosli Ali Arab Zainal Arifin Ahmad Department of Mechanical and Energy Engineering Erbil Technical Engineering CollegeErbil Polytechnic UniversityErbil44001Iraq Structural Materials Niche Area School of Materials and Mineral Resources EngineeringEngineering CampusUniversiti Sains Malaysia14300Nibong TebalPenangMalaysia State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

The influence of La_(2)O_(3) inclusion(0-3 wt%) on the micro structure,phase formation and mechanical properties of zirconia toughed alumina(ZTA) added with 5.0 wt% CeO_(2) was *** CeO_(2) composites were sintered at 1600℃ for 4 *** microstructure,phase formation,density,fracture toughness and hardness properties were characterised through FESEM,Microscopy Image Analysis Software and XRD diffractometer,Archimedes principle and Vickers indentation technique,*** XRD,image processing and FESEM reveal the existence of LaAl_(11)O_(18).The addition of La_(2)O_(3) incites the sintering,microstructure refinement,densification of ZTA-CeO_(2) matrix and phase ***,the hardness of ZTA-CeO_(2) ceramics is increased rapidly based on refinement of Al_(2)O_(3) grains,densification of ZTA-CeO_(2) composites and porosity *** is observed that the fracture toughness is enhanced through in situ formation of elongated LaAl_(11)O_(18) *** addition of 0.7 wt% La_(2)O_(3) culminated in the achievement of the optimum findings for density(4.41 g/cm^(3)),porosity(0.46%),hardness(1792 HV) and fracture toughness(8.8 MPa·m^(1/2)).Nevertheless,excess La_(2)O_(3) is proven to be detrimental as it displays poor mechanical properties due to the poor compactness of numerous LaAl_(11)O_(18) grains,coarsening of Al_(2)O_(3) grains and decline in density.

关键词： ZTA-CeO_(2) Ceramic composite Microstructural design Fracture toughness Vickers hardness Rare earths

Assessing the effects of site factors on the productivity of a feller buncher:a time and motion analysis

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Journal of Forestry Research 2019年第4期30卷 1471-1478页

作者： Ebru Bilici Abdullah E.Akay dalia Abbas Department of Forestry Dereli Vocational SchoolGiresun UniversityGiresunTurkey Department of Forest Engineering Faculty of ForestryBursa Technical UniversityBursaTurkey Department of Forestry Wildlife and FisheriesUniversity of TennesseeKnoxvilleTNUSA Department of Environmental Science American UniversityWashingtonDCUSA

We evaluated,for the first time in Turkey,the productivity of a feller buncher during clear-cut operations of two Brutian pine stands located in Canakkale,northwestern Turkey with different diameter classes and terrain *** the first stand with 24.6 cm average DBH,the feller buncher cut full trees and moved them to *** the second stand with 34.3 cm average DBH,the feller buncher cut trees in two stages due to their larger diameters and the relatively steep and rough terrain conditions of the *** effects of specific stand features,DBH and tree height measurements were assessed through statistical analysis in relation to *** results indicate that the average productivity for the first stand was about 118 m^3h^-1,while it was about 80 m3h-1 in the second *** though tree diameter and volume were higher in the second stand,productivity decreased by32.3%due to extra time spent on the two-stage cutting *** results revealed that harvesting operations should be planned carefully and the right equipment selected by accounting for different tree sizes,terrain conditions and machine specifications in order to better understand their effects on production.

关键词： Timber harvesting Feller buncher Timber size Productivity Time and motion study

Improving outdoor air quality based on building morphology:Numerical investigation

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Frontiers of Architectural Research 2020年第2期9卷 319-334页

作者： Asmaa Mohammed Hassan Ashraf abdel fatah El Mokadem Naglaa Ali Megahed Osama Mahmoud Abo Eleinen Architecture and Urban Planning DepartmentFaculty of EngineeringPort Said UniversityPort SaidEgypt

Due to rapid urbanization around the world,high concentrations of vehicular pollutants have deteriorated the outdoor air quality,which can affect the physical and psychological well-being of *** strategies have been proposed to overcome these harmful impacts by improving the dispersion of air ***,a question arises regarding the potential effects of building morphology on the dispersion of ***,transient three-dimensional Computational Fluid Dynamics(CFD)simulations are performed to examine the effect of building morphology on PM10 *** cases with various prototypes and morphological methods are compared with a simple building form to identify the patterns of PM10 dispersion within a given time sequence under a prevailing inflow *** results indicate that the different designs of building morphology with varying Relative compactness(RC)indicator highlight the importance of considering morphological factors to improve outdoor air *** addition,the proposed prototypes can reduce PM10 concentrations by approximately 30%e90%at specific points in the studied time *** particular,the vertical,horizontal,and grid folded prototypes can be considered more effective as an approximate decrease between 70%and 90%in PM10 concentrations is observed,which reflects the influence of building morphology on improving outdoor air quality.

关键词： Building morphology Morphological methods Outdoor air quality PM10 dispersion CFD simulation

Combination therapy of dabrafenib plus trametinib in patients with BRAF^(V600E)-mutated biliary tract cancer

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Hepatobiliary & Pancreatic Diseases International 2021年第5期20卷 506-507页

作者： Alessandro Rizzo Angela dalia Ricci Giovanni Brandi Division of Oncology Azienda Ospedaliero-Universitaria di Bolognavia Albertoni 15BolognaItaly

To the Editor: In the last decade, next-generation sequencing(NGS)-based molecular profiling has shed light on the molecular landscape of biliary tract cancer(BTC), revealing the presence of several potentially actionable mutations [1]. According to Clinical ***, there are at least 40 phase I to IV ongoing trials aimed at evaluating the role of targeted treatments in BTC, as monotherapy or in combination with other anticancer agents [2]. Early encouraging results have been observed with therapies targeting IDH mutations, FGFR fusions, HER family and, more recently, BRAF mutations [3].

关键词： BRAF cancer Clinical

Stochastic energy-demand analyses with random input parameters for the single-family house

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Building Simulation 2022年第3期15卷 357-371页

作者： Marcin Koniorczyk Witold Grymin Marcin Zygmunt dalia Bednarska Alicja Wieczorek Dariusz Gawin Lodz University of Technology Department of Building Physics and Building MaterialsPoland

In the analyses of the uncertainty propagation of buildings’energy-demand,the Monte Carlo method is commonly *** this study we present two alternative approaches:the stochastic perturbation method and the transformed random variable *** energy-demand analysis is performed for the representative single-family house in *** investigation is focused on two independent variables,considered as uncertain,the expanded polystyrene thermal conductivity and external temperature;however the generalization on any countable number of parameters is ***,the propagation of the uncertainty in the calculations of the energy consumption has been investigated using two aforementioned *** stochastic perturbation method is used to determine the expected value and central moments of the energy consumption,while the transformed random variable method allows to obtain the explicit form of energy consumption probability density function and further characteristic parameters like quantiles of energy *** calculated data evinces a high accordance with the results obtained by means of the Monte Carlo *** most important conclusions are related to the computational cost reduction,simplicity of the application and the appropriateness of the proposed approaches for the buildings’energy-demand calculations.

关键词： energy demand stochastic analysis transformed random variable method thermal conductivity probability distribution random multivariable