748 research outputs found

    Tätigkeitsbericht über zwei Jahre Vereinsarbeit

    Get PDF

    Components of Program for Analysis of Spectra and Their Testing

    Get PDF
    The spectral analysis of aqueous solutions of multi-component mixtures is used for identification and distinguishing of individual componentsin the mixture and subsequent determination of protonation constants and absorptivities of differently protonated particles in the solution in steadystate (Meloun and Havel 1985), (Leggett 1985). Apart from that also determined are the distribution diagrams, i.e. concentration proportions ofthe individual components at different pH values. The spectra are measured with various concentrations of the basic components (one or severalpolyvalent weak acids or bases) and various pH values within the chosen range of wavelengths. The obtained absorbance response area has to beanalyzed by non-linear regression using specialized algorithms. These algorithms have to meet certain requirements concerning the possibility ofcalculations and the level of outputs. A typical example is the SQUAD(84) program, which was gradually modified and extended, see, e.g., (Melounet al. 1986), (Meloun et al. 2012)

    Steganography Approach to Image Authentication Using Pulse Coupled Neural Network

    Get PDF
    This paper introduces a model for the authentication of large-scale images. The crucial element of the proposed model is the optimized Pulse Coupled Neural Network. This neural network generates position matrices based on which the embedding of authentication data into cover images is applied. Emphasis is placed on the minimalization of the stego image entropy change. Stego image entropy is consequently compared with the reference entropy of the cover image. The security of the suggested solution is granted by the neural network weights initialized with a steganographic key and by the encryption of accompanying steganographic data using the AES-256 algorithm. The integrity of the images is verified through the SHA-256 hash function. The integration of the accompanying and authentication data directly into the stego image and the authentication of the large images are the main contributions of the work

    Aplicação da tecnologia através de drones no Corpo de Bombeiros Militar de Santa Catarina

    Get PDF
    TCC(especialização) - Universidade Federal de Santa Catarina. Campus Araranguá. Tecnologias da Informação e Comunicação aplicadas à Segurança Pública e Direitos HumanosO Estado atua através de diversas instituições da Administração Direta com a finalidade de potencializar a prevenção e respostas voltadas a segurança pública. Neste sentido, o Corpo de Bombeiros Militar de Santa Catarina exerce um papel relevante, com deveres constitucionais de prover o Combate a Incêndio, Atendimento Pré Hospitalar, Resgate veicular, Busca Terrestre, Salvamento Aquático, Analise de Projetos e vistorias, Salvamento em Altura, Busca e Salvamento, entre outros. O presente trabalho discorre sobre o Direito Administrativo de forma a contribuir com a percepção da posição do Corpo de Bombeiros Militar de Santa Catarina na Administração Pública. Apresenta a estrutura organizacional e história da corporação CBMSC e o inicio das atividades de bombeiro em Santa Catarina, até os dias atuais. Em seu terceiro capitulo, traz informações sobre o surgimento dos primeiros drones; categorias e classes regulamentadas pela Agencia Nacional de Aviação Civil e exigências para sua operação; e a aplicação recente da tecnologia através de drones com analise dos seus benefícios na atividade de Busca e Salvamento do CBMSC.The State acts through several institutions of the Direct Administration with the purpose of enhancing the prevention and responses directed to public safety. In this sense, the Military Fire Brigade of Santa Catarina plays a relevant role, with constitutional duties to provide Fire Fighting, Prehospital Care, Vehicular Rescue, Terrestrial Search, Water Rescue, Analysis of Projects and Inspections, Rescue in Height, Search And Rescue, among others. The present work deals with Administrative Law in order to contribute to the perception of the position of the Santa Catarina Military Fire Brigade in Public Administration. It presents the organizational structure and history of the CBMSC corporation and the beginning of the activities of fireman in Santa Catarina, until the present day. In its third chapter, it brings information about the emergence of the first drones; Categories and classes regulated by the National Civil Aviation Agency and requirements for its operation; And the recent application of technology through drones with analysis of its benefits in the Search and Rescue activity of the CBMSC

    DRONES: Una visión crítica de los caminos propuestos

    Get PDF
    El uso masivo de drones en la actividad civil y comercial en este último tiempo ha obligado a las autoridades aeronáuticas de diversos Estados a reglamentar sobre el tema de manera provisoria. La doctrina aeronáutica en su mayoría sostiene que los vehículos aéreos no tripulados (VANTS) son aeronaves. Lo cierto es que, si bien el o los conceptos que hoy nos brinda la Organización Civil Internacional (OACI), o los derechos internos, se adaptan a estos vehículos, la poca reglamentación que hoy existe se opone a la casi totalidad de lo normado para aeronaves. En consecuencia, sostenemos que o bien se replantea el concepto de aeronave, o se legisla específicamente a los drones, ya que no es factible la aplicación del derecho aeronáutico actual

    Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

    Get PDF
    Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

    Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at s√=8 TeV with the ATLAS detector

    Get PDF
    The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1fb−1 of proton–proton collision data at √s = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t˜→tχ˜01 or t˜→ bχ˜±1 →bW(∗)χ˜01 , where χ˜01 (χ˜±1 ) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t˜ → tχ˜01 . For a branching fraction of 100%, top squark masses in the range 270–645 GeV are excluded for χ˜01 masses below 30 GeV. For a branching fraction of 50% to either t˜ → tχ˜01 or t˜ → bχ˜±1 , and assuming the χ˜±1 mass to be twice the χ˜01 mass, top squark masses in the range 250–550 GeV are excluded for χ˜01 masses below 60 GeV

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

    Get PDF
    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV
    corecore