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Ara es mostren els items 26112-26131 de 245647

    • Attitude control of a solar sail 

      Vilchez Llamazares, Enol (Universitat Politècnica de Catalunya, 2018-02-13)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Politecnico di Milano
      This study focuses to find the most beneficial control of attitude of a Solar Sail situated in the L1 Lagrange point. Several controls will be implemented in this work to find the most suitable one. From the most generic ...

    • Attitude control research with educational nanosatellites 

      Martínez, Úrsula; Bravo, Luis; Gligor, Dan; Olfe, Karl; Bello, Álvaro; Ezquerro, José Miguel; Rodríguez, Jacobo; Salgado, Pablo (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      This paper introduces the three-axis attitude control of the ESAT platform. ESAT is a modular nanosatellite that implements the popular 10x10x10 cm CubeSat standard, designed for hands-on learning at different educational ...

    • Attitude control techniques for a 1U CubeSat 

      Serrano Aporta, Joan (Universitat Politècnica de Catalunya, 2022-07-13)
      Treball Final de Grau
      Accés obert
      This thesis is focused on the study, design and simulation of an Attitude Control System for a 1U CubeSat. The simulations and their proper validation are carried out with MATLAB/Simulink. It is undertaken within the PLATHON ...

    • Attitude determination and control system development with a low thrust propulsion system for the 3Cat-8 nano-satellite mission 

      Navarro Simoni, Pol Eduard (Universitat Politècnica de Catalunya, 2023-02-14)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   Institut d'Estudis Espacials de Catalunya
      This final degree thesis describes the development and implementation of an ADCS simulator for the 3Cat-8 mission of the UPC NanoSat Lab, which enables the calculation of the actuators and controller variables. Additionally, ...

    • Attitude determination based on image processing 

      Lemaire Lemaire, Adrien (Universitat Politècnica de Catalunya, 2022-06-21)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Université de Lille
      In this report, we will explore the way to measure the angular position of a satellite, more precisely of a CubeSat, expressed with the Euler angles. We therefore consider all the rotations that are possible in a ...

    • Attitude Determination Control! System Software for Nano-Satellites 

      Juan Martínez, Enric (Universitat Politècnica de Catalunya, 2015-10-26)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Attitude Determination System for a Phased Array Beamformer 

      Garrucho Moras, Lidia (Universitat Politècnica de Catalunya, 2015-02)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Attitude Determination using Quaternion-based Algorithms for 3Cat-4 

      Navarro Trastoy, Ángel (Universitat Politècnica de Catalunya, 2020-07-20)
      Projecte Final de Màster Oficial
      Accés obert
      The determination of a spacecraft’s orientation is a major problem for every mission; payloads require specific characteristics to work and engines must aim the opposite direction to were the spacecraft is meant to move. ...

    • Attitude estimation for base station antennas based on downlink channel statistics 

      Ling, Cen; He, Yonguy; Yin, Xuefeng; Zhong, Zhimeng; Duan, Weiming; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this contribution, a maximum-likelihood-based approach is proposed for estimating the attitudes of sectoring base station (BS) antennas based on the power of the received signals observed by multiple user equipments ...

    • Attitude estimation for in-service base station antenna using downlink channel fading statistics 

      Ling, Cen; Yin, Xuefeng; Yongyu, He; Ruiz Boqué, Sílvia (2015-01-01)
      Article
      Accés obert
      Amaximum-likelihood-estimation method is proposed for extracting the attitude of a sectoring base station (BS) antenna by using the received signal strengths observed by multiple user equipments (UEs) in this contribution. ...

    • Attitude estimation of a small satellite using a multi-objective optimization approach 

      Gambon Bru, German (Universitat Politècnica de Catalunya / Imperial College London, 2010)
      Projecte/Treball Final de Carrera
      Accés obert
      This project analyses the performance of a multi-objective optimization approach for the estimation of the rates of rotation of a small satellite, given noisy measurements of the attitude. The performance of this method ...

    • Attosecond core-level spectroscopy reveals the flow of excitation in a material between light, carriers and phonons 

      Sidiropoulos, Themistoklis P. H.; Palo, Nicola di; Rivas Barragan, Daniel; Severino, Stefano; Reduzzi, Maurizio; Nandy, Biplob; Bauerhenne, Bernd; Krylow, Sergej; Vasileiadis, Thomas; Biegert, Jens (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      We use attosecond core-level X-ray spectroscopy to disentangle the spectral and dynamical signatures of energy conversion pathways between photons, charge carriers and the lattice in graphite with attosecond precision and ...

    • Attosecond pulse shaping using partial phase matching 

      Austin, Dane R.; Biegert, Jens (IOP, 2014-11-04)
      Article
      Accés obert

    • Attosecond soft X-ray absorption revealing the ultrafast non-adiabatic dynamics of furan 

      Severino, Stefano (Universitat Politècnica de Catalunya, 2023-03-13)
      Tesi
      Accés obert
      (English) One of the fundamental goals of the physical chemistry community has always been to be able to follow the details of the evolution of chemical reactions in real-time. Besides the extreme temporal resolution ...

    • Attosecond state-resolved carrier motion in quantum materials probed by soft x-ray XANES 

      Buades, Bárbara; Picón, Antonio; Berger, Emma; León, Iker; Palo, Nicola di; Cousin, Seth L.; Cocchi, Caterina; Pellegrin, Eric; Herrero Martin, Javier; Mañas-Valero, Samuel; Coronado, Eugenio; Danz, Thomas; Draxl, Claudia; Uemoto, Mitsuharu; Yabana, Kazuhiro; Schultze, Martin; Wall, Simon; Zürch, Michael; Biegert, Jens (AIP, 2021-03-10)
      Article
      Accés obert
      Recent developments in attosecond technology led to table-top x-ray spectroscopy in the soft x-ray range, thus uniting the element- and state-specificity of core-level x-ray absorption spectroscopy with the time resolution ...

    • Attosecond sublevel beating and nonlinear dressing on the 3d-to-5p and 3p-to-5s core-transitions at 91.3 eV and 210.4 eV in krypton 

      Seres, Enikoe; Seres, Jozsef; Namba, Shinichi; Afa, Iduabo John; Serrat Jurado, Carles (2017-12-11)
      Article
      Accés obert
      Applying extreme ultraviolet (XUV) transient absorption spectroscopy, the dynamics of the two laser dressed transitions 3d5/2-to-5p3/2 and 3p3/2-to-5s1/2 at photon energies of 91.3 eV and 210.4 eV were examined with ...

    • Attosecond x - ray transient dynamics 

      Delgado Guerrero, Jorge (Universitat Politècnica de Catalunya, 2017-09-08)
      Projecte Final de Màster Oficial
      Accés obert

    • Attosecond X-ray absorption fine-structure spectroscopy in condensed matter 

      Buades, Bárbara (Universitat Politècnica de Catalunya, 2018-07-31)
      Tesi
      Accés obert
      Attoscience aims to study electron dynamics in matter with unprecedented temporal resolution by using the shortest pulses generated on Earth. Currently, such resolution is only provided by sources that deliver attosecond ...

    • Attractive Factors of Environment-Friendly Daily Necessities 

      Chiu, Wei-Chen; Ho, Chun-Heng (Kansei Engineering and Emotion Research (KEER), 2022-09)
      Text en actes de congrés
      Accés obert
      Going green is increasingly important to the market. The present research indicates that functional and emotional factors can achieve the best-perceived effects when choosing an environment-friendly product. Therefore, ...

    • Attractive planar panelization using dynamic relaxation principles 

      Gauss, Florian; Teuffel, Patrick (CIMNE, 2015-10-19)
      Comunicació de congrés
      Accés obert
      In the presented paper a new method is proposed to approximate a given NURBS surface with a PQ (Planar Quad) mesh. The desired mesh layout will be generated in plan and then attracted to the target surface. The process ...