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Low-power, high-speed, and area-efficient sequential circuits by quantum-dot cellular automata: T-latch and counter study

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Frontiers of Information Technology & Electronic Engineering 2023年第3期24卷 457-469页

作者： mohammad gholami Zaman AMIRZADEH Department of Electrical Engineering Faculty of Engineering and TechnologyUniversity of MazandaranBabolsar ***Iran Department of Electrical Engineering Mazandaran University of Science and TechnologyBabol ***Iran

Quantum-dot cellular automata(QCA)is a new nanotechnology for the implementation of nano-sized digital circuits.This nanotechnology is remarkable in terms of speed,area,and power consumption compared to complementary metal-oxide-semiconductor(CMOS)technology and can significantly improve the design of various logic circuits.We propose a new method for implementing a T-latch in QCA technology in this paper.The proposed method uses the intrinsic features of QCA in timing and clock phases,and therefore,the proposed cell structure is less occupied and less power-consuming than existing implementation methods.In the proposed T-latch,compared to previous best designs,reductions of 6.45%in area occupation and 44.49%in power consumption were achieved.In addition,for the first time,a reset-based T-latch and a T-latch with set and reset capabilities are designed.Using the proposed T-latch,a new 3-bit counter is developed which reduces 2.14%cell numbers compared to the best of previous designs.Moreover,based on the 3-bit counter,a 4-bit counter is designed,which reduces 0.51%cell numbers and 4.16%cross-section area compared to previous designs.In addition,two selective counters are introduced to count from 0 to 5 and from 2 to 5.Simulations were performed using QCADesigner and QCAPro tools in coherence vector engine mode.The proposed circuits are compared with related designs in terms of delay,cell numbers,area,and leakage power.

关键词： Quantum-dot cellular automata(QCA) Quantum-dot T-latch T-flip-flop Counter Selective counter QCADesigner QCAPro

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Tracing suspended and bed sediments during high and low water periods using geochemical characteristics-Case study:Vazrood watershed,northern Iran

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Journal of Mountain Science 2024年第2期21卷 470-483页

作者： KARIMI Nabiyeh gholami Leila KAVIAN Ataollah KHALEDI DARVISHAN Abdulvahed Department of Watershed Management Faculty of Natural ResourcesSari Agricultural Sciences and Natural Resources UniversitySari ***Iran Department of Watershed Management Engineering Faculty of Natural ResourcesTarbiat Modares UniversityNoor ***Iran

Complete and comprehensive information about sediment dynamic and identification of hotspots of sediment production and transport are necessary for understanding the erosion processes and increasing the efficiency of soil and water conservation practices.Numerous studies used the sediment fingerprint techniques to investigate the contribution of different sources in suspended and bed sediment yield of the watersheds.However,the contribution of various land use/land covers in suspended and bed sediment yield for the great Caspian Sea basin is in an aura of ambiguity and the present study was conducted to gather information about an important part of this area in northern Iran,where rangelands are located upstream of Hyrcanian forests and dense agricultural lands are located downstream.The surface soil of different land use/land covers including forest,rangeland,agriculture and streambank lands were sampled in 30 points.Suspended and bed sediments were sampled in the watershed outlet in two high and low water periods.Geochemical characteristics of soil and sediment samples containing 59 elements were measured using ICP-OES GBC Integra.The reliable and suitable tracers from 59 elements were then selected using Range test,Kruskal-Wallis and Discriminant Function Analysis,respectively,in FingerPro package of R software.The results showed that for suspended sediment,streambank and rangeland had the highest contributions of 86.2%and 47.5%,respectively,in two high and low water periods.For bed sediment,in two high and low water periods,rangeland and streambank had the highest contributions of 73.8%and 84.4%,respectively.Land use change and especially human activities such as agriculture,road construction and development of residential areas along the main river riparian zone has led to a significant increase in suspended and bed sediments.

关键词： Caspian Sea basin FingerPro Geochemistry Sediment transport Tracer combination

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Edge Coloring of Graphs with Applications in Coding Theory

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China Communications 2021年第1期18卷 181-195页

作者： Ghaffar Raeisi mohammad gholami Department of Mathematical Sciences Shahrekord UniversityShahrekordP.O.Box 115Iran

In this paper,a new type of edge coloring of graphs together with an algorithm for such an edge coloring is presented to construct some columnweight three low-density parity-check(LDPC)codes whose Tanner graphs are free of 4-cycles.This kind of edge coloring is applied on some well-known classes of graphs such as complete graphs and complete bipartite graphs to generate some column-weight 3 LDPC codes having flexibility in terms of code length and rate.Interestingly,the constructed(3;k)-regular codes with regularities k=4;5;:::;22 have lengths n=12;20;26,35;48;57;70;88;104;117;140;155;176;204;228;247;280;301;330;having minimum block length compared to the best known similar codes in the literature.In addition to linear complexity of generating such parity-check matrices,they can be considered as the base matrices of some quasi-cyclic(QC)LDPC codes with maximum achievable girth 18,which inherit the low-complexity encoder implementations of QC-LDPC codes.Simulation results show that the QC-LDPC codes with large girth lifted from the constructed base matrices have good performances and outperform random codes,progressive edge growth LDPC codes,some finite fields and group rings based QC-LDPC codes and also have a close competition to the standard IEEE 802.16e(WiMAX)code.

关键词： low-density parity-check code edge coloring Quasi-cyclic LDPC code girth AWGN channel

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Some Explicit Constructions of Type-Ⅱ,Ⅲ,Ⅳ,Ⅴ QC-LDPC Codes with Girth 6

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China Communications 2020年第5期17卷 89-109页

作者： Farzaneh Abedi mohammad gholami Department of Mathematics Shahrekord UniversityP.O.Box 88186-34141ShahrekordIran School of Computer Sciences Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5746TehranIran

Multi-type quasi-cyclic(QC) low-density parity-check(LDPC) codes can be considered as multiple-edge protograph QC-LDPC codes having some advantages in the minimum Hamming distance bound over single-edge protograph codes or type-Ⅰ QC-LDPC codes when the base matrices have the same size. In this paper, we investigate a class of multi-type QC-LDPC codes whose parity-check matrices contain just one blockrow of circulants and we obtain the generator matrix of such codes in general form. Using the permutation arrays and defining injection arrays, we present a new approach to construct a class of high-rate type-Ⅰ QC-LDPC codes with girth 6 from the constructed 4-cycle free multi-type QC-LDPC codes. In continue, for 2 ≤ w≤6, some type-w QC-LDPC codes with girth 6 are constructed explicitly such that the constructed codes are flexible in terms of rate and length. To the best of our knowledge, for w = 5,6, this is the first paper which deals with the explicit construction of type-w QC-LDPC codes with girth 6 and high rates. Moreover, for w = 3, 4, the constructed type-w QC-LDPC codes have better(6,8)-cycle multiplicities than the codes with minimum achievable length recently constructed by cyclic difference families(CDFs). Simulation results show that the binary and non-binary constructed codes outperform the constituent underlying QC-LDPC codes.

关键词： QC-LDPC codes permutation arrays girth explicit constructions

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COMPARING TWO CLUSTERING-BASED TECHNIQUES TO TRACK MOBILE NODES IN INDUSTRIAL WIRELESS SENSOR NETWORKS

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Journal of Systems Science and Systems Engineering 2016年第2期25卷 177-209页

作者： mohammad gholami Robert W. Brennan Department of Mechanical and Manufacturing Engineering Schulich School of Engineering University of Calgary Calgary Alberta Canada T2N 1N4

Tracking mobile nodes in dynamic and noisy conditions of industrial environments has provided a paradigm for many issues inherent in the area of distributed control systems in general and wireless sensor networks in particular. Due to the dynamic nature of the industrial environments, a practical tracking system is required that is adaptable to the changes in the environment. More specifically, given the limited resources of wireless nodes and the challenges created by harsh industrial environments there is a need for a technique that can modify the configuration of the system on the fly as new wireless nodes are added to the network and obsolete ones are removed. To address these issues, two cluster-based tracking systems, one static and the other dynamic, are proposed to organize the overall network field into a set of tracking zones, each composed of a sink node and a set of corresponding anchor nodes. To manage the wireless nodes activities and inter and intra cluster communications, an agent-based technique is employed. To compare the architectures, we report on a set of experiments performed in JADE （Java Agent Development Environment）. In these experiments, we compare two agent-based approaches （dynamic and static） for managing clusters of wireless sensor nodes in a distributed tracking system. The experimental results corroborate the efficiency of the static clusters versus the robustness and effectiveness of the dynamic clusters.

关键词： Wireless sensor networks tracking mobile nodes factory automation distributed adaptive systems reconfigurability

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Efficacy of Valerian Extract on Sleep Quality after Coronary Artery bypass Graft Surgery: A Triple-Blind Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2021年第1期27卷 7-15页

作者： Halimeh khaton Zare Elmi mohammad gholami Mandana Saki Farzad Ebrahimzadeh Student Research Committee Lorestan University of MedicalSciencesKhorramabad(***)Iran School of Nursing and Midwifery Lorestan University of Medical SciencesKhorramabad(***)Iran Social Determinantsof Health Research Center Lorestan University of MedicalSciencesKhorramabad(***)Iran Department of Biostatistics and Epidemiology School of Health and NutritionLoreatan Univeraity of Medical GcienceaKhorramabad(***)Iran

Objective:To assess the effect of valerian root extract on the sleep quality of patients after coronary artery bypass graft(CABG)surgery.Methods:The patients who participated in this triple-blind clinical trial were selected by permuted block randomization.The participants were assigned to the valerian(n=36)and placebo(n=36)groups.The valerian group received 530 mg of valerian capsules for 30 nights after CABG surgery,and the placebo group received 530 mg of the placebo capsules containing wheat flour.The Pittsburgh Sleep Quality Index(PSQI),the prothrombin time(PT)and partial thromboplastin time(PTT)were assessed on four occasions,including the baseline,the 3 rd,14 th and 30 th days following intervention.Results:The odds ratio of worsened sleep quality significantly varied over time(the interaction of time and group)in the valerian group compared to the placebo group in various dimensions including total sleep quality(P=0.001),sleep latency(P<0.01),sleep duration(P=0.020),sleep efficiency(P=0.001)and daytime dysfunction(P=0.025).No significant difference was observed in the alterations of the odds ratio of PT in the two groups over time.(P=0.371).Conclusion:The consumption of oral valerian root extract over 30 nights could significantly improve the patients'sleep quality safely after CABG surgery.

关键词： coronary artery bypass graft herbal medicine randomized controlled trial sleep quality valerian

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Molecular investigation of exoU and exoY virulence genes in Pseudomonas aeruginosa collected from hospitalized patients in North of Iran:A descriptive-analytical study

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Journal of Acute Disease 2024年第2期13卷 74-80页

作者： Ahmad Reza Moradi Mehrdad gholami Lotfollah Davoodi Negar Hajilou Hamid Reza Goli Sana Institute of Higher Education SariIran Department of Medical Microbiology and Virology Faculty of MedicineMazandaran University of Medical SciencesSariIran Antimicrobial Resistance Research Center Faculty of MedicineMazandaran University of Medical SciencesSariIran Molecular and Cell Biology Research Center Faculty of MedicineMazandaran University of Medical SciencesSariIran

Objective:To investigate the frequency of exoU and exoY genes in patients with Pseudomonas aeruginosa infection.Methods:In this study,100 clinical isolates of Pseudomonas aeruginosa were collected from patients hospitalized in educational-therapeutic hospitals and were identified using standard microbiological tests.Then,the antibiotic resistance pattern of the isolates was determined by the disk agar diffusion method.The bacterial DNAs were extracted by the alkaline lysis method.Finally,the presence of exoU and exoY genes was evaluated by the PCR test.Results:In this study,47%,72%,29%,39%,40%,and 44%of the isolates were non-susceptible to piperacillin,aztreonam,ceftazidime,imipenem,tobramycin,and ciprofloxacin,respectively.In addition,95%and 93%of the clinical isolates carried the exoU and exoY genes.Blood and fecal isolates had both virulence genes,while only one wound isolate had neither genes.Meanwhile,all urinary isolates contained the exoY gene and only one isolate lacked the exoU gene.Also,88 isolates simultaneously had both exoU and exoY genes.Conclusions:High prevalence of exoU and exoY genes in this region indicates a significant role of typeⅢsecretion system in pathogenesis of Pseudomonas aeruginosa.The typeⅢsecretion system may be a suitable target to reduce the pathogenicity of this bacterium.

关键词： Pseudomonas aeruginosa exoU exoY Virulence gene TypeⅢsecretion system PCR

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Exploring the potential and safety of quantum dots in allergy diagnostics

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Microsystems & Nanoengineering 2023年第6期9卷 1-23页

作者： Milad Mohkam mohammad Sadraeian Antonio Lauto Ahmad gholami Seyed Hesamodin Nabavizadeh Hossein Esmaeilzadeh Soheila Alyasin Allergy Research Center Shiraz University of Medical SciencesShirazIran Institute for Biomedical Materials and Devices(IBMD) Faculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia School of Science University of Western SydneyCampbelltownNSW2560Australia School of Medicine University of Western SydneyCampbelltownNSW2560Australia Biotechnology Research Center Shiraz University of Medical SciencesShirazIran Department of Pharmaceutical Biotechnology School of PharmacyShiraz University of Medical SciencesShirazIran Department of Allergy and Clinical Immunology Namazi HospitalShiraz University of Medical SciencesShirazIran

Biomedical investigations in nanotherapeutics and nanomedicine have recently intensified in pursuit of new therapies with improved efficacy.Quantum dots(QDs)are promising nanomaterials that possess a wide array of advantageous properties,including electronic properties,optical properties,and engineered biocompatibility under physiological conditions.Due to these characteristics,QDs are mainly used for biomedical labeling and theranostic(therapeutic-diagnostic)agents.QDs can be functionalized with ligands to facilitate their interaction with the immune system,specific IgE,and effector cell receptors.However,undesirable side effects such as hypersensitivity and toxicity may occur,requiring further assessment.This review systematically summarizes the potential uses of QDs in the allergy field.An overview of the definition and development of QDs is provided,along with the applications of QDs in allergy studies,including the detection of allergen-specific IgE(sIgE),food allergens,and sIgE in cellular tests.The potential treatment of allergies with QDs is also described,highlighting the toxicity and biocompatibility of these nanodevices.Finally,we discuss the current findings on the immunotoxicity of QDs.Several favorable points regarding the use of QDs for allergy diagnosis and treatment are noted.

关键词： allergy diagnosis potential

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Risk of permanent medical impairment after road traffic crashes: A systematic review

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中华创伤杂志:英文版 2023年第5期26卷 267-275页

作者： Mahla Babaie mohammadamin Joulani mohammad Hosein Ranjbar Hameghavandi mohammad Hossein Asgardoon Marzieh Nojomi Gerard MO'Reilly Morteza gholami Zahra Ghodsi Vafa Rahimi-Movaghar Sina Trauma and Surgery Research Center Tehran University of Medical SciencesTehranIran Student Research Committee Faculty of MedicineIran University of Medical SciencesTehranIran Universal Scientific Education and Research Network TehranIran Iranian Student Society for Immunodeficiencies Students'Scientific Research CenterTehran University of Medical SciencesTehranIran Preventive Medicine and Public Health Research Center Psychosocial Health Research InstituteDepartment of Community and Family MedicineIran University of Medical SciencesTehranIran Department of Sociology&Anthropology Nipissing UniversityNorth BayOntarioCanada School of Public Health and Preventive Medicine Monash UniversityMelbourneAustralia Emergency and Trauma Centre The AlfredMelbourneAustralia National Trauma Research Institute The AlfredMelbourneAustralia Metabolic Disorders Research Center Endocrinology and Metabolism Molecular-Cellular Sciences InstituteTehran University of Medical SciencesTehranIran Endocrinology and Metabolism Research Center Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical SciencesTehranIran Brain and Spinal Cord Injury Research Center Neuroscience InstituteTehran University of Medical SciencesTehranIran Department of Neurosurgery Shariati Hospita Tehran Univerty of MedicalSciencesTeranra Institute of Biochemistry and Biophysics University of TehranTehranIran

Purpose:To systematically review the risk of permanent disability related to road traffic injuries(RTIs)and to determine the implications for future research regarding permanent impairment following road traffic crashes.Methods:We conducted this systematic review according to the preferred reporting items for systematic reviews and meta-analysis statement.An extended search of the literature was carried out in 4 major electronic databases for scientific research papers published from January 1980 to February 2020.Two teams include 2 reviewers each,screened independently the titles/abstracts,and after that,reviewed the full text of the included studies.The quality of the studies was assessed using the strengthening the reporting of observational studies in epidemiology(STROBE)checklist.A third reviewer was assessed any discrepancy and all data of included studies were extracted.Finally,the data were systematically analyzed,and the related data were interpreted.Results:Five out of 16 studies were evaluated as high-quality according to the STROBE checklist.Fifteen studies ranked the initial injuries according to the abbreviated injury scale 2005.Five studies reported the total risk of permanent medical impairment following RTIs which varied from 2%to 23%for car occupants and 2.8%to 46%for cyclists.Seven studies reported the risk of permanent medical impairment of the different body regions.Eleven studies stated the most common body region to develop permanent impairment,of which 6 studies demonstrated that injuries of the cervical spine and neck were at the highest risk of becoming permanent injured.Conclusion:The finding of this review revealed the necessity of providing a globally validated method to evaluate permanent medical impairment following RTIs across the world.This would facilitate decisionmaking about traffic injuries and efficient management to reduce the financial and psychological burdens for individuals and communities.

关键词： Morbidity Wounds and injuries Automobiles Motor vehicles Accidents Traffic

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Effect of graphene oxide and reduced graphene oxide nanosheets on the microstructure and mechanical properties of mild steel jointing by flux-cored arc welding

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International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 505-514页

作者： mohammad Khosravi mohammad Mansouri Ali gholami Yadollah Yaghoubinezhad Department of Mechanical Engineering Birjand University of Technology BirjandP.O.Box 97175-569235Iran Department of Materials Engineering Birjand University of Technology BirjandP.O.Box 97175-569315Iran

The effect of graphene oxide(GO)and reduced graphene oxide(RGO)nanosheets on the microstructure and mechanical properties of welded joints of mild steel was evaluated by flux-cored arc welding.GO was synthesized by the Hummer’s method and was reduced under hydrothermal conditions at a pressure of 1.1 MPa at 180°C for 12 h.1,3,and 10 mg/mL paste fillers were used in GO and RGO,and applied to the weld notch.The results clearly showed that by increasing the concentration of RGO up to 10 mg/mL,the tensile strength and hardness of the weld metal were improved by approximately 20.5%and 38.4%,respectively,because the coarse grains were changed into fine domains.The domain of the nanosheets cluster was 19.85×10^?9 m.Specifically,the RGO nanosheets contributed to modifying the mechanical properties of the welded steel,likely due to dislocation pinning.

关键词： graphene oxide reduced graphene oxide flux-cored arc welding steel mechanical properties

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