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Health care associated infections, antibiotic resistance and clinical outcome: A surveillance study from Sanandaj, Iran

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World Journal of Clinical Cases 2016年第3期4卷 63-70页

作者： Jafar Soltani Bahman Poorabbas neda miri Jalal Mardaneh Department of Pediatrics Faculty of Medicine Kurdistan University of Medical Sciences Alborzi Clinical Microbiology Research Center Nemazee Hospital Shiraz University of Medical Sciences Besat Tertiary Hospital Kurdistan University of Medical Sciences

AIM: To study the antibiotic susceptibility patterns of gram-negative healthcare associated bacterial infections at two tertiary hospitals in the Sanandaj city, Kurdistan Province, ***: From January 2012 to December 2012, all positive cultures from potentially sterile body fluids were gathered. They sent to professor Alborzi clinical microbiology center in Shiraz for further analysis and susceptibility testing. The antibiotic susceptibility was determined using the Kirby-Bauer method(disk diffusiontechnique). The Results were interpreted according to Clinical and Laboratory Standards Institute guidelines against a series of antimicrobials. World Health Organization definitions for Healthcare associated infections were ***: Seven hundred and thirty-two positive cultures were reported from both hospitals. Seventynine isolates/patients fulfilled the study criteria for healthcare associated gram-negative infections. The most frequent bacterial cultures were from the pediatric wards(52%). Serratia marcescens(S. marcescens)(38%) Escherichia coli(E. coli)(19%), Klebsiella pneumoniae(K. pneumoniae)(19%), Acinetobacter baumannii(6%), Enterobacter species(6%), Serratia odorifera(4%) and Pseudomonas species(5%) were the most frequently isolated organisms. The susceptibility pattern of common isolates i.e., S. marcescens, E. coli and K. pneumoniae for commonly used antibiotics were as follows: Ampicillin 3.3%, 6.7%, 20%; gentamicin 73.3%, 73.3%, 46.7%; ceftazidim 80%, 73.3%, 33.3%; cefepim 80%, 86.7%, 46.7%; piperacillin/tazobactam 90%, 66.7%, 86.7%; ciprofloxacin 100%, 73.3%, 86.7%; imipenem 100%, 100%, 100%, respectively. CONCLUSION: The most effective antibiotics against gram-negative healthcare associated infections are imipenem followed by ciprofloxacin. The resistance rate is high against ampicillin and cephalothin. The high mortality rate(46.1%) associated with S. marcescens is alarming.

关键词： Escherichia coli Klebsiella pneumoniae Serratia marcescens Extended-spectrum beta-lactamase Nosocomial infections Antibiotic susceptibility

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Analysis of the overall pressure balance loop for a methanol-to-olefins dual fluidized bed reactor-regenerator

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Particuology 2023年第11期82卷 13-24页

作者： Bijan Hejazi neda Shabany Chemical Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhad***Iran Petrochemical Research and Technology Co. TehranIran

Development of a comprehensive reactor model is of paramount importance for design and scale-up of methanol-to-olefins (MTO) process in a dual fluidized bed reactor (DFB). These models must integrate suitable reaction kinetic expressions with hydrodynamic models properly descriptive of gas-solid contact in fluidized bed reactors. In this modeling study, our previously developed kinetic models of MTO fluidized bed reactor and regenerator are coupled with overall mass, energy and pressure balances to ensure smooth circulation of catalyst particles between the two fluidized beds. This integrated model was then applied to determine geometric dimensions of a demo-scale MTO DFB configuration and to obtain the mass distribution of catalyst particles throughout the entire system including the pipes connecting the two reactors. Our model is capable of being integrated into simulation software such as Aspen Plus for plant-wide optimization and scale-up studies.

关键词： Pressure balance loop Methanol-to-olefins Dual fluidized bed SAPO-34 catalyst

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Cloud service selection using cloud service brokers: approaches and challenges

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Frontiers of Computer Science 2019年第3期13卷 599-617页

作者： Meysam VAKILI neda JAHANGIRI Mohsen SHARIFI Department of Computer Engineering University of Science and Culture Tehran 14619-68151 Iran School of Computer Engineering Iran University of Science and Technology Tehran 16846-13114 Iran

Cloud computing users are faced with a wide variety of services to choose from. Consequently, a number of cloud service brokers (CSBs) have emerged to help users in their service selection process. This paper reviews the recent approaches that have been introduced and used for cloud service brokerage and discusses their challenges accordingly. We propose a set of attributes for a CSB to be considered effective. DifFerent CSBs' approaches are classified as either single service or multiple service models. The CSBs are then assessed, analyzed, and compared with respect to the proposed set of attributes. Based on our studies, CSBs with multiple service models that support more of the proposed effective CSB attributes have wider application in cloud computing environments.

关键词： cloud service broker (CSB) cloud service selection cloud computing quality of service (QoS)

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Design and optimization of thermally responsive autonomous dynamic glazed attachment systems for building solar heat gain control

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Building Simulation 2023年第10期16卷 1971-1986页

作者： neda Ghaeili Ardabili Yanxiao Feng Julian Wang Department of Architectural Engineering Pennsylvania State UniversityUniversity ParkPA16802USA

Windows,as transparent intermediaries between the indoors and outdoors,have a significant impact on building energy consumption and indoor visual and thermal *** the recent development of dynamic window structures,especially various attachment technologies,the thermal,visual,and energy performances of windows have been significantly *** this research,a new dynamic transparent louver structure sandwiched within conventional double-pane windows is proposed,designed,optimized,and examined in terms of energy savings in different *** uniqueness of the proposed design is that it autonomously responds to the seasonal needs prompted by solar heat gain through the use of thermally deflected bimetallic ***,by integrating spectral selective louvers into the system design,the dynamic structure enables strong solar infrared modulation with a little visible *** optical and thermal properties of the dynamic glazing structure support about 30%and 16%seasonal variations in solar heat gains and visible transmittance,***,the potential energy savings were explored via parametric energy simulations,which showed significant potential for heating and cooling energy *** proposed design demonstrates a simple smart dynamic glazing structure driven by seasonal temperature differences,with significant solar heat control capabilities and minor effects on the visible or visual quality of the glazing system.

关键词： smart window window attachment spectrally selective louver solar heat gain visible transmittance bimetal structure

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Development of a radiographic method for measuring the discrete spectrum of the electron beam from a plasma focus device

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Plasma Science and Technology 2017年第7期19卷 26-33页

作者： neda SHAMSIAN Babak SHIRANI BIDABADI Hosein PIRJAMADI Department of Nuclear Engineering Faculty of Advanced Sciences and Technologies University of Isfahan

An indirect method is proposed for measuring the relative energy spectrum of the pulsed electron beam of a plasma focus device. The Bremsstrahlung x-ray, generated by the collision of electrons against the anode surface, was measured behind lead filters with various thicknesses using a radiographic film system. A matrix equation was considered in order to explain the relation between the x-ray dose and the spectral amplitudes of the electron beam. The electron spectrum of the device was measured at 0.6 mbar argon and 22 kV charging voltage, in four discrete energy intervals extending up to 500 keV. The results of the experiments show that most of the electrons are emitted in the 125-375 keV energy range and the spectral amplitude becomes negligible beyond 375 keV.

关键词： magnetized plasma plasma focus plasma diagnostics electron beam energyspectrum x-ray dosimetry

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Soil functional indicators in mixed beech forests are clearly species-specifi c

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Journal of Forestry Research 2023年第4期34卷 1033-1049页

作者： Yahya Kooch neda Ghorbanzadeh Samaneh Hajimirzaaghaee Markus Egli Faculty of Natural Resources&Marine Sciences Tarbiat Modares UniversityNoor 46417-76489MazandaranIran Faculty of Natural Resources University of GuilanSowmeh Sara 4432-3136GuilanIran Faculty of Natural Resources University of Agricultural Sciences and Natural ResourcesSariIran Department of Geography University of ZürichZurichSwitzerland

Beech stands are considered part of the ancient forest ecosystems in the northern *** mixed stands in beach forest ecosystems,the type of associated tree species can signifi cantly aff ect soil functions,but their infl uence on microbial activity,nutrient cycling and belowground properties is ***,we considered forest patches in northern Iran that are dominated by diff erent tree species:Fagus orientalis Lipsky,Quercus castaneifolia ***.,Pterocarya fraxinifolia(Lam.),Tilia begonifolia Stev.,Zelkova carpinifolia Dippe,Acer cappadocicum Gled,Acer velutinum Boiss.,Fraxinus excelsior L.,Carpinus betulus L.,and Alnus subcordata *** each forest patch–tree species,litter and soil samples(25×25×10 cm,100 of each)were analyzed for determine soil and litter properties and their relationship with tree *** litter decomposition rate during a 1-year experiment was also determined.A PCA showed a clear diff erence between selected litter and soil characteristics among tree ***,***,***,***,***,***,and *** enhanced soil microbial biomass of carbon,whereas patches with ***,*** and *** had faster litter decomposition and enhanced biotic activities and C and N ***,soil function indicators were species-specifi c in the mixed beech ***(a N-fi xing species),*** and *** were main drivers of microbial activities related to nutrient cycling in the old-growth beech forest.

关键词： Old-growth forest Deciduous tree species Soil fertility Microbial activities Carbon and nitrogen cycle

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A New Anti-counterfeiting Feature Relying on Invisible Non-toxic Fluorescent Carbon Dots

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Journal of Analysis and Testing 2020年第4期4卷 307-315页

作者： Zahra Fatahi neda Esfandiari Zahra Ranjbar Protein Research Center Shahid Beheshti University*** TehranIran Faculty of Life Sciences and Biotechnology Shahid Beheshti University*** TehranIran Faculty of Surface Coatings and Novel Technologies Institute for Color Science and Technology(ICST)*** TehranIran

Fluorescent patterning has attracted a great deal of attention owing to its potential applications in different areas in particular anti-counterfeiting *** carbon dots(CDs)as a type of fluorescent dyes can be used in invisible patterning due to their remarkable optical *** study attempts to introduce green fluorescent CDs as a promising factor in textile ***,a new green source opted to prepare CDs using the hydrothermal ***,toxicity assays were performed to prove the safety of these carbon-based nanoparticles for *** were also conjugated with cotton fiber ***,these green prepared CDs are promising for security labeling in the textile industry.

关键词： Green carbon dots Cytotoxicity Anti-counterfeiting Cotton fiber

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Static behavior of offshore two-planar tubular KT-joints under axial loading at fire-induced elevated temperatures

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Journal of Ocean Engineering and Science 2019年第4期4卷 352-372页

作者： neda Azari-Dodaran Hamid Ahmadi Faculty of Civil Engineering University of TabrizTabriz ***Iran

A total of 540 nonlinear steady-state finite element analyses were performed to study the influence of temperature and dimensionless geometrical parameters(β,γ,θ,andτ)on the ultimate strength,failure modes,and initial stiffness of two-planar tubular *** joints were analyzed under two types of axial loading and five different temperatures(20℃,200℃,400℃,550℃,and 700℃).So far,there has not been any equation available for calculating the ultimate strength of two-planar tubular KT-joints at elevated ***,after parametric study,a set of design formulas were developed through nonlinear regression analyses,to calculate the ultimate strength of two-planar tubular KT-joints subjected to axial loading at elevated temperatures.

关键词： Ultimate strength Two-planar tubular KT-joint Axial loading Elevated temperatures Parametric equation

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CD9 role in proliferation, rejuvenation, and therapeutic applications

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Genes & Diseases 2024年第3期11卷 95-97页

作者： Sai Priyanka Kodam neda Baghban Mujib Ullah Institutefor Immunityand Transplantation Stem Cell Biology and Regenerative MedicineSchool of MedicineMolecular Medicine Department of MedicineStanford UniversityPaloAltoCA94304USA

The CD9 gene,also known as the Tspan29 gene,codes for a protein called CD9,which is a member of the tetraspanin family of transmembrane proteins.^(1) The CD9 protein is involved in various cellular processes,including cell proliferation,differentiation,adhesion,and migration.^(1,2) CD9 has also been found to play a role in the regulation of stem cell proliferation and differentiation.

关键词： migration. therapeutic CD9

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Design of MMIC oscillators using GaAs 0.2 μm PHEMT technology

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第10期13卷 793-798页

作者： neda KAZEMY NAJAFABADI Sare NEMATI Massoud DOUSTI Department of Electrical Engineering Arak BranchIslamic Azad UniversityArakIran Department of Electrical Engineering Science and Research BranchIslamic Azad UniversityTehranIran

We propose a feedback type oscillator and two negative resistance *** microwave oscillators have been designed in the S band frequency.A relatively symmetric resonator is used in the feedback type *** first negative resistance oscillator uses a simple lumped element resonator which is substituted by a microstrip resonator in the second oscillator to improve *** negative resistance oscillator produces 4.207 dBm and 7.124 dBm output power with the lumped element resonator and microstrip resonator respectively,and the feedback type oscillator produces ?10.707 dBm output *** feedback type oscillator operates at 3 GHz with phase noise levels at-83.30 dBc/Hz and-103.3 dBc/Hz at 100 kHz and 1 MHz offset frequencies *** phase noise levels of the negative resistance oscillator with the lumped element resonator are-94.64 dBc/Hz and-116 dBc/Hz at 100 kHz and 1 MHz offset frequencies respectively,at an oscillation frequency of 3.053 *** the microstrip resonator the phase noise levels are-99.49 dBc/Hz and-119.641 dBc/Hz at 100 kHz and 1 MHz offset frequencies respectively,at an oscillation frequency of 3.072 *** results showed that both the output power and the phase noise of the negative resistance oscillators were better than those of the feedback type oscillator.

关键词： Microwave oscillator Feedback type Negative resistance Resonator Advanced design system software

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