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Internet of Things Enabled Energy Aware Metaheuristic Clustering for Real Time Disaster Management

Computer Systems Science & Engineering 2023年第5期45卷 1561-1576页

作者： Riya Kumarasamy Santhanaraj Surendran Rajendran Carlos andres Tavera Romero Sadish Sendil Murugaraj Department of Information Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Center for Artificial Intelligence and Research(CAIR) Chennai Institute of TechnologyChennai600069India COMBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Department of Emerging Technologies Guru Nanak Institute of TechnologyIbrahipatnamTelangana501506India

Wireless Sensor Networks(WSNs)are a major element of Internet of Things(IoT)networks which offer seamless sensing and wireless *** management in smart cities can be considered as a safety critical ***,it becomes essential in ensuring network accessibility by improving the lifetime of IoT assisted *** and multihop routing are considered beneficial solutions to accomplish energy efficiency in IoT *** article designs an IoT enabled energy aware metaheuristic clustering with routing protocol for real time disaster management(EAMCR-RTDM).The proposed EAMCR-RTDM technique mainly intends to manage the energy utilization of nodes with the consideration of the features of the disaster *** achieve this,EAMCR-RTDM technique primarily designs a yellow saddle goatfish based clustering(YSGF-C)technique to elect cluster heads(CHs)and organize *** addition,enhanced cockroach swarm optimization(ECSO)based multihop routing(ECSO-MHR)approach was derived for optimal route *** YSGF-C and ECSO-MHR techniques compute fitness functions using different input variables for achieving improved energy efficiency and network *** design of YSGF-C and ECSO-MHR techniques for disaster management in IoT networks shows the novelty of the *** examining the improved outcomes of the EAMCR-RTDM system,a wide range of simulations were performed and the extensive results are assessed in terms of different *** comparative outcomes highlighted the enhanced outcomes of the EAMCRRTDM algorithm over the existing approaches.

关键词： Internet of things disaster management wireless sensor networks real time applications routing clustering

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Dispersal behavior of yellowjacket （Vespula germanica） queens

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Insect Science 2018年第1期25卷 109-116页

作者： Maite Masciocchi andres S. martinez Aria J. Pereira Jose M. Villacide Juan C. Corley CONICET CCT Comahue INTA Grupo de Ecologia de Poblaciones de Insectos INTA EEA Bariloche Argentina Centro Regional Universitario Bariloche U. N. del Comahue Bariloche 8400 Argentina

Understanding the factors that affect animal dispersal behavior is important from both *** and applied perspectives. Dispersal can have clear evolutionary and ecological consequences, but for normative insect pests, dispersal capacity can also help to explain invasion success. Vespula germanica is a social wasp that, in the last century, has successfully invaded several regions of the world, showing one of the highest spread rates reported for a nonnative insect. In contrast with nonsocial wasps, in social species, queens are responsible for population redistribution and spread, as workers are sterile. For V. germanica, it has been observed that queen flight is limited to 2 distinct periods： early autumn, when new queens leave the nest to mate and find sheltered places in which to hibernate, and spring when new colonies are founded. Our aim was to study the flight behavior of V. germanica queens by focusing on the different periods in which dispersal occurs, characterizing as well the potential contribution of queen flight （i.e., distance） to the observed geographical spread. Our results suggest that the distances flown by nonover- wintered queens is greater than that flown by overwintered individuals, suggesting that the main queen dispersal events would occur before queens enter hibernation. This could relate to a behavioral trait of the queens to avoid the inbreeding with related drones. Additionally, given the short distances flown and remarkable geographical spread observed, we provide evidence showing that queen dispersal by flight is likely to contribute proportionately less to population spread than human-aided factors.

关键词： flight potential German wasps hibernation invasive wasps social insect

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NHC-catalysed[3+2]-asymmetric annulation between pyrazolin-4,5-diones and enals:synthesis of novel spirocyclic pyrazolone γ-butyrolactones and computational study of mechanism and stereoselectivity

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Organic Chemistry Frontiers 2022年第2期9卷 420-427页

作者： Marta Gil-Ordonez Alicia Maestro Pablo Ortega Pablo G.Jambrina Jose M.andres GIR-SintACat-Instituto Universitario CINQUIMA y Departamento de Química Orgánica Facultad de CienciasUniversidad de ValladolidPaseo Belén 747011 ValladolidSpain Departamento de Química Física University of Salamanca37008 SalamancaSpain

Chiral pyrazolones with a spirocyclic centre at the C4-position are widely found in a large family of medically relevant *** recent years,organocatalysis,particularly that performed with quiral N-heterocyclic carbenes(NHCs),has allowed the enantioselective synthesis of these spirocyclic compounds despite its inherent *** this work,we describe the fully diastereo-and highly enantioselective synthesis of novel spirocyclic pyrazolone γ-butyrolactones via NHC-catalysed[3+2]annulation reaction of enals and 1H-pyrazol-4,*** understand the catalytic mechanism and origin of stereoselectivity,electronic structure calculations were carried *** considering various pathways,we concluded that the stereoselectivity-determining step is the formation of the lactone that proceeds after addition of the NHC derived homoenolate to the electrophilic carbonyl group of pyrazolin-4,*** calculations predict that the free energy barrier is lower for the(RS)product,which is also the main product experimentally obtained.

关键词： synthesis spiro mechanism

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Planarized THz quantum cascade lasers for broadband coherent photonics

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Light(Science & Applications) 2022年第12期11卷 3098-3108页

作者： Urban Senica andres Forrer Tudor Olariu Paolo Micheletti Sara Cibella Guido Torrioli Mattias Beck Jerome Faist Giacomo Scalari Quantum Optoelectronics Group Institute of Quantum ElectronicsETH Zurich8093 ZürichSwitzerland Istituto di Fotonica e Nanotecnologie CNRVia del Fosso del Cavaliere 10000133 RomeItaly

Recently,there has been a growing interest in integrated THz photonics for various applications in communications,spectroscopy and *** present a new integrated photonic platform based on active and passive elements integrated in a double-metal,high-confinement waveguide layout planarized with a low-loss *** extended top metallization keeps waveguide losses low while improving dispersion,thermal and RF properties,as it enables to decouple the design of THz and microwave ***-running on-chip quantum cascade laser combs spanning 800 GHz,harmonic states with over 1.1 THz bandwidth and RF-injected broadband incoherent states spanning over nearly 1.6 THz are observed using a homogeneous quantum-cascade active *** a strong external RF drive,actively mode-locked pulses as short as 4.4 ps can be produced,as measured by *** demonstrate as well passive waveguides with low insertion loss,enabling the tuning of the laser cavity boundary conditions and the cointegration of active and passive elements on the same THz photonic chip.

关键词： waveguide passive tuning

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The Early Evolutionary History and Adaptive Radiation of the Pterosauria

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Acta Geologica Sinica(English Edition) 2012年第6期86卷 1356-1365页

作者： Brian andres Department of Geology University of South Florida

Phylogenetic analyses of early pterosaur species are relatively new and contradictory. However, they imply a similar evolutionary history for early pterosaurs： a large divergence of all major early groups of pterosaurs before the first named pterosaur species appeared in the fossil record. This large, unsampled divergence may be a record of the initial adaptive radiation of the pterosaurs, but a recent comprehensive phylogenetic analysis reconstructs named Triassic pterosaur species grouped together in a monophyletic clade with all other major groups diverging later. Ten patterns that characterize adaptive radiations put forward by Gavrilets and Losos （2009） are assessed for congruence with the comprehensive phylogeny and two previous phylogenies to determine which are consistent with our notions of an adaptive radiation. Of the eight patterns that can be applied to pterosaurs, only six vary between pterosaur phylogenies. Of these six patterns, all apply to the three phylogenies with varying amounts of support. For many patterns, however, the comprehensive phylogeny has a greater magnitude, shorter time span, or is the only topology within which they can be assessed. Pterosaurs are characterized by an adaptive radiation no matter which phylogeny is considered, but congruence with the fossil record increases the support and information content of a phylogeny by reducing the time and area within which to reconstruct evolutionary history.

关键词： Pterosauria adaptive radiation phylogeny Triassic

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Twin-Wire Networks for Zero Interconnect,High-Density 4-Wire Electrical Characterizations of Materials

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Research 2022年第2期2022卷 225-234页

作者： Nerio andres Montoya Valeria Criscuolo Andrea Lo Presti Raffaele Vecchione Christian Falconi Department of Electronic Engincering University of Rome Tor VergataVia del Politecnico 1Roma 00133Italy School of Physics Universidad Nacional de ColombiaA.A.3840 MedellinColombia Center for Advanced Biomaterial for Health Care Istituto Italiano di TecnologiaLargo Barsantie Matteucci 53Naples 80125Italy

Four-wire measurements have been introduced by Lord Kelvin in 1861 and have since become the standard technique for characterizing small resistances and ***,high-density 4-wire measurements are generally complex,time-consuming,and inefficient because of constraints on interconnects,pads,external wires,and mechanical contacts,thus reducing reproducibility,statistical significance,and throu ***,we introduce,systematically design,analyze,and experimentally validate zero interconnect networks interfaced to external instrumentation by couples of twin wire.3D-printed holders with magnets,interconnects,nonadhesive layers,and spacers can effortlessly establish excellent electrical connections with tunable or minimum contact forces and enable accurate measurements even for delicate devices,such as thin metals on soft *** an example,we measured all the resistances of a twin-wire 29-resistor network made of silver-nanoparticle ink printed on polyimide,paper,or photo paper,including during sintering or temperature calibration,resulting in anunprecedentedly easy and accurate characterization of both resistivity and its temperature *** theoretical framework and experimental strategies reported here represent a breakthrough toward zero interconnect,simple,and efficient high-density 4-wire characterizations,can be generalized to other 4-wire measurements(impedances,sensors)and can open the way to more statistically meaningful and reproducible analyses of materials,high-throughput measurements,and minimally invasive characterizations of biomaterials.

关键词： impedance characterization breakthrough

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Queens remate despite traumatic mating in stingless bees

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Current Zoology 2022年第1期68卷 81-92页

作者： Jamille Costa VEIGA Gustavo Rodrigo Sanches RUIZ Gislene Almeida CARVALHO-ZILSE Cristiano MENEZES Felipe andres Leon CONTRERA Bee Biology and Ecology Lab Instituto de Ciencias BiologicasUniversidade Federal do ParaBelem66075-110 ParaBrazil Biodiversity and Ecosystem Services Research Group Instituto Tecnologico Vale-Desenvolvimento SustentavelBelem66055-090 ParaBrazil Ecology and Zoology of Invertebrates Lab Instituto de Ciencias BiologicasUniversidade Federal do ParaBelem66075-110 ParaBrazil Bee Research Group Instituto Nacional de Pesquisas da AmazoniaManaus69067-375 AmazonasBrazil Research and Development Embrapa Meio AmbienteJaguariuna13820-000 Sao PauloBrazil

Males can control female reproduction using genital plugs to impede access by *** social bees,ants,and wasps,plugging may involve traumatic mating,with females being *** stingless bees,chances are that plugs may promote ovarian activan,and are thought to ensure single mating—a general tendency among the social ***,understanding on relationships between mating plugs,traumatic mating,and mating systems in stingless bees remains *** address this,we(1)compared mated queens of 7 Neotropical species to understand the patterns of copulatory marks in females and(2)compared pre-and post-mating genitalia of males and females in Melipona fasciculata to depict plug functional *** revealed an unprecedented consequence of mating in stingless bees:the characteristic marks left by mating plugs on female abdomens and the inferences that can be made from *** our surprise,in 1 species *** we found that queens retain the plug long after mating,and may carry it for the rest of their *** the other 6 species retained the plug for only a short *** queens were only found in ***,whose multiple copulatory marks match previous findings of polyandry in this *** study shows that queens can remate,and suggests that male genital morphology may determine in part the time persistence of *** conclude that traumatic mating plugs do not fully prevent remating in stingless bees and that mating systems are not uniform in this ***,exceptional cases of facultative polyandry in social insects—for example,when mating plugs fail—may confirm a general tendency for single mating in close link with efficient mating plugs.

关键词： copulatory marks facultative polyandry genital morphology male harm sexual conflict

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Elucidating galaxy assembly bias in SDSS

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Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 130-150页

作者： andres N.Salcedo Ying Zu Youcai Zhang Huiyuan Wang Xiaohu Yang Yiheng Wu Yipeng Jing Houjun Mo David HWeinberg Department of Astronomy and Center for Cosmology and AstroParticle Physics The Ohio State UniversityColumbus OH 43210USA Department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryShanghai 200030China CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Department of Astronomy University of Massachusetts AmherstAmherst MA 01003USA

We investigate the level of galaxy assembly bias in the Sloan Digital Sky Survey (SDSS) main galaxy sample using ELUCID,a state-of-the-art constrained simulation that accurately reconstructed the initial density perturbations within the SDSS *** top of the ELUCID haloes,we develop an extended HOD model that includes the assembly bias of central and satellite galaxies,parameterized as Q_(cen)and Q_(sat),respectively,to predict a suite of one-and two-point *** particular,our fiducial constraint employs the probability distribution of the galaxy number counts measured on 8 h^(-1)Mpc scales N_8^(g) and the projected cross-correlation functions of quintiles of galaxies selected by N_(8)^(g) with our entire galaxy *** perform extensive tests of the efficacy of our method by fitting the same observables to mock data using both constrained and non-constrained *** discover that in many cases the level of cosmic variance between the two simulations can produce biased constraints that lead to an erroneous detection of galaxy assembly bias if the non-constrained simulation is *** applying our method to the SDSS data,the ELUCID reconstruction effectively removes an otherwise strong degeneracy between cosmic variance and galaxy assembly bias in SDSS,enabling us to derive an accurate and stringent constraint on the *** fiducial ELUCID constraint,for galaxies above a stellar mass threshold M_(*)=10^(10.2)h^(-2)M_(⊙),is Q_(cen)=-0.09±0.05 and Q_(sat)=0.09±0.10,indicating no evidence for a significant (>2σ) galaxy assembly bias in the local Universe probed by ***,our method provides a promising path to the robust modelling of the galaxy-halo connection within future surveys like DESI and PFS.

关键词： spatial distribution of galaxies large scale structure of the Universe numerical simulation

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Simulation of a Walking Robot-E xoskeleton Movement on a Movable Base

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Journal of Artificial Intelligence and Technology 2021年第4期1卷 207-213页

作者： Sergey Jatsun Andrei Malchikov Andrey Yatsun AI Manji Khalil andres Santiago martinez Leon Department of Mechanics Mechatronics and RoboticsSouthwest State UniversityKursk 305040Russian Federation

The paper studies the problem of movement of a two-legged walking machine on a movable *** task is relevant for design rehabilitation and mechanotherapy complexes for people with impaired functions of the musculoskeletal system and presents a mathematical model that allows obtaining the kinematic and dynamic parameters of the movement of the executive units of the device under *** paper presents a method for planning the trajectory of exoskeleton links,its algorithmic and software *** paper proposes the structure of the automatic link position control system,which ensures the movement of the executive links along a given trajectory.A mathematical apparatus is proposed for studying the dynamics of the controlled movement of the links of the human-machine system of the *** article presents the results of *** on the movement of the low-limb exoskeleton leg in the one step mode and analyzes them.

关键词： walking robot mathematical simulation kinematic analysis trajectory planning

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Solvent-free fabrication of broadband WS2 photodetectors on paper

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Opto-Electronic Advances 2023年第3期6卷 1-11页

作者： Wenliang Zhang Onur Çakıroğlu Abdullah Al-Enizi Ayman Nafady Xuetao Gan Xiaohua Ma Sruthi Kuriakose Yong Xie andres Castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM-CSIC)Madrid E-28049Spain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710129China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China

Paper-based devices have attracted extensive attention due to the growing demand for disposable flexible ***,we integrate semiconducting devices on cellulose paper substrate through a simple abrasion technique that yields high-performance photodetectors.A solvent-free WS_(2) film deposited on paper favors an effective electron-hole separation and hampers *** as-prepared paper-based WS2 photodetectors exhibit a sensitive photoresponse over a wide spectral range spanning from ultraviolet(365 nm)to near-infrared(940 nm).Their responsivity value reaches up to~270 mA W^(−1) at 35 V under a power density of 35 mW cm^(−2).A high performance photodetector was achieved by controlling the environmental exposure as the ambient oxygen molecules were found to decrease the photoresponse and stability of the WS_(2) ***,we have built a spectrometer using such a paperbased WS_(2) device as the photodetecting component to illustrate its potential *** present work could promote the development of cost-effective disposable photodetection devices.

关键词： paper electronics photodetector van der Waals materials solvent-free deposition tungsten disulfide

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