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Volatility spillovers,structural breaks and uncertainty in technology sector markets

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Financial Innovation 2023年第1期9卷 2908-2938页

作者： Linn Arnell Em.a.Engström Gazi salah Uddin mdBokhtiar Hasan Sang Hoon Kang Landshypotek Bank StockholmSweden Department of management and Engineering Linköping UniversityLinköpingSweden Department of Finance and Banking Islamic UniversityKushtia 7003Bangladesh School of Business Pusan National UniversityBusanRepublic of Korea

This study uses the dynamic conditional correlation to investigate how technology subsector stocks interact with financial assets in the face of economic and financial *** results suggest that structural breaks have diverse effects on financial asset connectedness and that the level of bond linkage increases when the trend *** see a growing co-movement between the technology sector and major financial assets when uncertainty is ***,our findings indicate that the connectedness response varies depending on the type of uncertainty shock.

关键词： Technology sector Diversification Dynamic conditional correlation Uncertainty Structural breaks

Assessing the Efficacy of Improved Learning in Hourly Global Irradiance Prediction

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Computers, materials & Continua 2023年第11期77卷 2579-2594页

作者： Abdennasser Dahmani Yamina Ammi Nadjem Bailek Alban Kuriqi Nadhir Al-Ansari salah Hanini Ilhami Colak Laith Abualigah El-Sayed m.El-kenawy Department of mechanical Engineering Faculty of Science and TechnologyGIDD Industrial Engineering and Sustainable Development LaboratoryUniversity of RelizaneBourmadiaRelizane48000Algeria Laboratory of Biomaterials and Transport Phenomena(LBmPT) University of MedeaUrban PoleMedea26000Algeria Energies and materials Research Laboratory Faculty of Sciences and TechnologyUniversity of TamanghassetTamanrasset10034Algeria Sustainable Development and Computer Science Laboratory Faculty of Sciences and TechnologyAhmed Draia University of AdrarAdrarAlgeria CERIS Instituto Superior TécnicoUniversidade de LisboaLisbon1049-001Portugal Civil Engineering Department University for Business and TechnologyPristina10000Kosovo Department of Civil Environmental and Natural Resources EngineeringLulea University of TechnologyLulea97187Sweden Engineering and Architecture Faculty Nisantasi UniversityIstanbulTurkey Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl al-Bayt UniversityMafraq25113Jordan Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman19328Jordan mEU Research Unit Middle East UniversityAmman11831Jordan Applied Science Research Center Applied Science Private UniversityAmman11931Jordan School of Computer Sciences Universiti Sains MalaysiaPulau Pinang11800Malaysia Department of Computing and Information Systems School of Engineering and TechnologySunway University MalaysiaPetaling Jaya27500Malaysia Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt

Increasing global energy consumption has become an urgent problem.a. natural energy sources such as oil,gas,and uranium.a.e rapidly running *** into renewable energy sources such as solar energy is being pursued to counter *** energy is one of the most promising renewable energy sources,as it has the potential to meet the world’s energy needs *** study aims to develop and evaluate artificial intelligence(AI)models for predicting hourly global *** hyperparameters were optimized using the Broyden-FletcherGoldfarb-Shanno(BFGS)quasi-Newton training algorithm.a.d STATISTICA *** from two stations in Algeria with different climatic zones were used to develop the *** error m.a.urements were used to determine the accuracy of the prediction models,including the correlation coefficient,the m.a. absolute error,and the root m.a. square error(RmSE).The optimal support vector machine(SVm)model showed exceptional efficiency during the training phase,with a high correlation coefficient(R=0.99)and a low m.a. absolute error(mAE=26.5741 Wh/m^(2)),as well as an RmSE of 38.7045 Wh/m^(2) across all ***,this study highlights the importance of accurate prediction models in the renewable energy,which can contribute to better energy management and planning.

关键词： Renewable energy energy prediction global irradiation artificial intelligence BFGS quasi-Newton training algorithm

multi-mode Frequency Reconfigurable Conformal Antenna for modern Electronic Systems

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Computers, materials & Continua 2022年第11期73卷 3861-3877页

作者： Abir Zaidi Esraa mousa Ali Abdullah G.Alharbi salah Ud-Din Khan moham.a. Alsharef mohammed S.Alzaidi Sherif S.m.Ghoneim Laboratory EEA&TI Faculty of Science and Techniques(FSTM)MohammediaHassan II UniversityCasablancaMorocco Faculty of Aviation Sciences Amman Arab UniversityAmman11953Jordan Department of Electrical Engineering Faculty of EngineeringJouf UniversitySakaka42421Saudi Arabia Sustainable Energy Technologies Center College of EngineeringKing Saud UniversityP.O.Box 800Riyadh11421Saudia Arabia Electrical Engineering Department College of EngineeringTaif UniversityP.O.Box 11099Taif21944Saudi Arabia

The article presents a miniaturized monopole antenna dedicated to modern flexible electronic *** antenna combines three fundamental properties in a single ***,it is characterized by a com.a.t size com.a.ed to the state-of-the-art literature with an overall size of 18×18×0.254 mm3,secondly,the proposed antenna integrates the reconfigurability function of frequency,produced by m.a.s of a Positive-IntrinsicNegative(PIN)diode introduced into the radiating ***,the antenna is able to switch between different frequencies and different modes,making it suitable to meet the ever-changing demands of communication ***,the antenna is equipped by the property of *** fact,a conformability test is performed and has demonstrated the stability of the antenna performance under normal and bending ***,in order to demonstrate the potential of the proposed antenna,a com.a.ison between the simulated and m.a.ured results is made and turned out to be a strong agreement,making the antenna an excellent candidate for future miniaturized rigid and conformal devices.

关键词： monopole antenna frequency reconfigurable co-planar waveguide(CPW)fed flexible electronics com.a.t size

Essential oils from Elaeoselinum.a.clepium: Chemical composition, antimicrobial and antioxidant properties

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Asian Pacific Journal of Tropical Biomedicine 2016年第10期6卷 851-857页

作者： moufida Bouchekrit Hocine Laouer mohamed Hajji moncef Nasri Serkos Artin Haroutounian salah Akkal Laboratory of Natural Biological Resources Valorization Faculty of Sciences University of Setif Laboratory of Enzyme Engineering and microbiology National School of Engineers of Sfax Chemistry Laboratory Agricultural University of Athens Valorization of Natural Resources Bioactive Molecules and Biological Analysis Unit Department of Chemistry University of Mentouri Constantine1

Objective: To evaluate the chemical composition of the essential oil isolated from Elaeoselinum.a.clepium(L.) Bertol.(E. asclepium), and test the efficiency of the essential oil as an antimicrobial and antioxidant ***: Essential oil was obtained from the aerial parts of E. asclepium by hydro distillation and analyzed by gas chromatography and gas chromatography coupled with mass spectrometry. We study for the first time the chemical composition of the essential oil of E. asclepium, followed by the in vitro antimicrobial activities, which were evaluated by agar diffusion method against six Gram-positive bacteria, five Gram-negative bacteria, and two fungi. In addition, The antioxidant activities were also investigated using assays of 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity and ferricreducing ***: The analyzed essential oil of the aerial parts of E. asclepium was rich in apinene(43.9%), other compounds detected in appreciable amounts were sabinene(27.9%) and b-pinene(16.0%). The essential oil yields 1.2%, the IC50 values of essential oil in 1,1-diphenyl-2-picrylhydrazyl assay in the reducing power assay were 48.26 mg/m L and at 1 mg/m L, respectively. The absorbance value of essential oil at 700 nm was0.956. The antimicrobial effect was higher on Candida albicans ATCC 1024 strain with the inhibition zone 14.5 mm than bacteria and ***: The essential oil of E. asclepium has antimicrobial and antioxidant activities. These species may be used as an important source of natural antimicrobial and antioxidant agents.

关键词： Elaeoselinum asclepium Apiaceae Essential oil Antimicrobial activity Antioxidant activity Reducing power

Nanoflower ZnO thin-film grown by hydrothermal technique based Schottky diode

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Journal of Semiconductors 2020年第10期41卷 25-28页

作者： Ghusoon m.a.i Ahmed K.Khalid salah m.Swadi Electrical Engineering Department College of EngineeringMustansiriyah UniversityBaghdadIraq

This paper reports the realization of planar Schottky diodes based on nanorod ZnO thin *** nanorod ZnO thin film was fabricated by hydrothermal technique on boron doped p-type Si(100)*** Ag//ZnO/Al planar diode operating with voltage bias from–3 to 3 *** I–V characteristics clearly indicate that the devices have rectifying *** thermionic emission theory governs the current across the studied Schottky *** device achieved a turn-on voltage of 0.9 V,barrier height 0.69 e V and saturation current of 1.2×10^(–6)*** diode shows a very large ideality factor(n>>2)which is attributed to high interface trap *** surface topology was investigated by scanning electron microscope(SEm).The structural properties of the nanostructured ZnO thin film were characterized by X-ray diffraction(XRD).The SEm images reveal that the ZnO nanorods grow perpendicular to the substrate with uniformity and high *** XRD pattern illustrates the dominant peak appearing at(002).This intense peak indicates the c-axis orientated phase of the wurtzite ZnO *** demonstrates that the crystals grow uniformly perpendicular to the substrate surface in good agreement with the SEm images.

关键词： ZnO Schottky diode thin film

Formulation of a Net Zero Assessment System for Healthcare Facilities

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Journal of Geoscience and Environment Protection 2023年第7期11卷 118-135页

作者： Esraa Elmitainy salah m. El-Haggar School of Sciences and Engineering The American University in Cairo New Cairo Egypt

The international efforts to limit climate change are increasing, that during the COP26 convention, reaching Net Zero Greenhouse Gas emissions became part of the global goals for many countries and entities. One of the sectors that holds the responsibility of addressing the im.a.ts of climate change is the healthcare sector, and accordingly, it is also encouraged to take a leading role in maintaining its sustainability and be a role model for the other sectors. Additionally, the buildings sector, through the World Green Building council, has taken the initiative to launch the Net Zero Carbon Buildings Commitment for the sector. Based on these practices, the work presented aims to introduce and formulate an Approaching Net Zero assessment methodology to be integrated as part of the sustainability criteria and rating system for healthcare facilities in developing countries. The methodology planned is based on four different aspects which are: 1) Approaching Net Zero Energy, 2) Approaching Net Zero Wastewater, 3) Approaching Net Zero Solid Waste, and 4) Approaching Net Zero GHG emissions. The facility should have achieved a Green Building certification through any certification body, and then apply for the aspect on which it requires to be assessed. The assessment methodology follows a systematic approach, where a baseline year of normal operation is determined for existing facilities to act as a base of assessment, and normal design practices for new facilities Based on the assessment and proof of performance enhancement, the facility will either be awarded a basic certificate for achieving continuous savings, or additionally be awarded a best performance certificate com.a.ed to other facilities in the same category.

关键词： Healthcare Facilities Sustainability Net Zero Concept Water Efficiency Energy Efficiency Cradle-to-Cradle/Waste Reduction GHG Emissions

Copper Delivery by the Copper Chaperone for Chloroplast and Cytosolic Copper/Zinc- Superoxide Dismutases： Regulation and Unexpected Phenotypes in an Arabidopsis mutant

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molecular Plant 2009年第6期2卷 1336-1350页

作者： Christopher m. Cohu salah E. Abdel-Ghany Kathryn A. Gogolin Reynolds Alexander m. Onofrio Jared R. Bodecker Jeffrey A. Kimbrel Krishna K. Niyogi marinus Pilon Biology Department Colorado State University Fort Collins CO 80523-1878 USA Department of Plant and microbial Biology University of California Berkeley CA 94720-3102 USA

Copper （Cu） is an important mineral nutrient found in chloroplasts as a cofactor associated with plastocyanin and Cu/Zn superoxide dismutase （Cu/ZnSOD）. Superoxide dismutases are metallo-enzymes found in most oxygenic organisms with proposed roles in reducing oxidative stress. Several recent studies in Arabidopsis have shown that microRNAs and a SQUAmOSA promoter binding protein-like7 （SPL7） transcription factor function to down-regulate the expression of many Cu-proteins, including Cu/ZnSOD in both plastids and the cytosol, during growth on low Cu. Plants contain the Cu Chaperone for SOD （CCS） that delivers Cu to Cu/ZnSODs, and, in Arabidopsis, both cytosolic and plastidic CCS versions are encoded by one gene. In this study, we demonstrate that Arabiclopsis CCS transcript levels are regulated by Cu, mediated by microRNA 398 that was not previously predicted to target CCS. The microRNA target site is conserved in CCS of Oryza sativa. The data suggest that Cu-regulated microRNAs may have more mRNA targets than was previously predicted. A CCS null mutant has no m.a.urable SOD activity in the chloroplast and cytosol, indicating an absolute requirement for CCS. When the CCS null mutant was grown on high Cu media, it lacked both Fe superoxide dismutase （FeSOD） and Cu/ZnSOD activity. However, this did not lead to a visual phenotype and no photosynthetic deficiencies were detected, even after high light stress. These results indicate that Cu/ZnSOD is not a pivotal component of the photosynthetic anti-oxidant system during growth in laboratory conditions.

关键词： Chloroplast photosynthesis copper homeostasis superoxide dismutase microRNA.

Atmospheric photochemistry and secondary aerosol formation of urban air in Lyon,France

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Journal of Environmental Sciences 2021年第1期33卷 311-323页

作者： salah Eddine Sbai Chunlin Li Antoinette Boreave Nicolas Charbonnel Sebastien Perrier Philippe Vernoux Farida Bentayeb Christian George Sonia Gil Department of physics Laboratoires de physique des hauts Energies Modelisation et SimulationMohammed V Uniuersity in RabatRabatMorocco Universite lyon Universite Claude Bernard Lyon 1CNRSIRCELYON2 Auenue Albert Einstein69100 LyonFrance Department of Earth and Planetary Sciences Weizmann Institute of Science76100 RehovotIsrael

Photochemical aging of volatile organic compounds(VOCs)in the atmosphere is an important source of secondary organic aerosol(SOA).To evaluate the formation potential of SOA at an urban site in Lyon(France),an outdoor experiment using a Potential Aerosol mass(PAm)oxidation flow reactor(OFR)was conducted throughout entire days during JanuaryFebruary *** variation of SOA formations and their correlation with OH radical exposure(OHexp),ambient pollutants(VOCs and particulate matters,Pm),Relative Humidity(RH),and temperature were explored in this *** urban air was exposed to high concentration of OH radicals with OHexp in range of(0.2-1.2)×10^12 molecule/(cm^3·sec),corresponding to several days to weeks of equivalent atmospheric photochemical *** results informed that urban air at Lyon has high potency to contribute to SOA,and these SOA productions were favored from OH radical photochemical oxidation rather than via *** SOA formation(36μg/m^3)was obtained at OHexp of about 7.4×10^11 molecule/(cm^3·sec),equivalent to approximately 5 days of atmospheric *** correlation between SOA formation and ambient environment conditions(RH&temperature,VOCs and Pm)was *** was the first time to estimate SOA formation potential from.a.bient air over a long period in urban environment of Lyon.

关键词： Urban air Oxidation Flow Reactor(OFR) Secondary Organic Aerosol(SOA) Volatile Organic Compounds(VOC) Photochemistry Lyon

The Im.a.t of Inoculum Preparation media on Pollutant Removal through Phycoremediation of Agricultural Drainage Water by Desmodesmus sp.

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国际实验植物学杂志(英文) 2023年第10期92卷 2875-2890页

作者： Asm.a.salah Hoda Sany Abo El-Khair B.El-Sayed Reham m.El-Bahbohy Heba I.mohamed Ayman Amin Plant Physiology Division Department of Agricultural BotanyFaculty of AgricultureCairo UniversityGizaP.O.Box 12613Egypt Algal Biotechnology Unit National Research CentreDokkiGiza12622Egypt Biological and Geological Science Department Faculty of EducationAin Shams UniversityCairo11341Egypt

Water is the most essential natural resource for the future *** production is extensively water-dependent and a significant polluter of water ***,this work investigated the effect of two different preparation media[Bold’s Basal medium(BBm.a.d Dom.a.i cheese whey(DCW)]for agricultural drainage water(ADW)*** treatments were incubated for 6 *** to the results of biomass productivity,specific growth rate,photosynthetic pigments,and biochemical composition,Desmodesmus *** grow in drainage water without *** two treatments significantly reduced the concentration of nitrate,phosphate,chemical oxygen demand,and sodium in ***,using cheese whey with BBm.a. inoculum preparation media enhanced the lipid accumulation in the algal biomass(25.4%w/w)and gave the best biodiesel properties among ***,combining remediation of drainage water with microalgae mass production can achieve the sustainability of agriculture.

关键词： Desmodesmus sp. drainage water nutrients recycle photosynthetic pigments phycoremediation water scarcity