Ändra sökning
Avgränsa sökresultatet
1234567 151 - 200 av 818
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Träffar per sida
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
Markera
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 151. El-Taher, A.
    et al.
    Pang, Xiaodan
    RISE., Swedish ICT, Acreo.
    Schatz, R.
    Jacobsen, G.
    RISE., Swedish ICT, Acreo.
    Popov, S.
    Sergeyev, S.
    Noise characterization and transmission evaluation of unrepeated raman amplified DP-16QAM link2015Ingår i: Conference on Optical Fiber Communication, Technical Digest Series, 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    Impairments characterization and performance evaluation of Raman amplified unrepeated DP-16QAM transmissions are conducted. Experimental results indicate that small gain in forward direction enhance the system signal-to-noise ratio for longer reach without introducing noticeable penalty

  • 152.
    Engelke, Ulrich
    et al.
    Commonwealth Scientific and Industrial Research Organisation, Australia.
    Darcy, Daniel P.
    Dolby Laboratories, USA.
    Mulliken, Grant H.
    Dolby Laboratories, USA.
    Bosse, Sebstian
    Fraunhofer Institute for Telecommunications, Germany.
    Martini, Maria G.
    Kingston University, UK.
    Arndt, Sebstian
    NTNU Norwegian University of Science and Technology, Norway.
    Antons, Jan Niklas
    Technische Universiät Berlin, Germany.
    Chan, Kit Y.
    Curtin University, Australia.
    Ramzan, Naeem
    University of the West of Scotland, UK.
    Brunnstrom, Kjell
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Psychophysiology-Based QoE Assessment: A Survey2017Ingår i: IEEE Journal on Selected Topics in Signal Processing, ISSN 1932-4553, E-ISSN 1941-0484, Vol. 11, nr 1, s. 6-21, artikel-id 7569001Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We present a survey of psychophysiology-based assessment for quality of experience (QoE) in advanced multimedia technologies. We provide a classification of methods relevant to QoE and describe related psychological processes, experimental design considerations, and signal analysis techniques. We summarize multimodal techniques and discuss several important aspects of psychophysiology-based QoE assessment, including the synergies with psychophysical assessment and the need for standardized experimental design. This survey is not considered to be exhaustive but serves as a guideline for those interested to further explore this emerging field of research.

  • 153. Engholm, M
    et al.
    Jelger, P
    Laurell, F
     Norin, L
    RISE., Swedish ICT, Acreo.
    Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping2009Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 24, nr 8, s. 1285-Artikel i tidskrift (Refereegranskat)
  • 154. Engholm, M
    et al.
    Lashgari, K
    Edvarsson, S
    Westin, G
    Norin, L
    RISE., Swedish ICT, Acreo.
    Atomically designed precursors in optical fiber amplifiers: The thermal stability of the heterobimetallic ErAl3(OPri)12 in a solution-coated silica soot2005Ingår i: Journal of Applied Physics, Vol. 97, nr 11, s. 113104-Artikel i tidskrift (Refereegranskat)
  • 155. Engholm, M
    et al.
     Norin, L
    RISE., Swedish ICT, Acreo.
    Comment on: "Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation"2008Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 33, nr 11, s. 1216-Artikel i tidskrift (Refereegranskat)
  • 156. Engholm, M
    et al.
    Norin, L
    RISE., Swedish ICT, Acreo.
    Preventing photodarkening in ytterbium-doped high power fiber lasers, correlation to the UV-transparency of the core glass2008Ingår i: Optics Express, Vol. 16, s. 1260-68Artikel i tidskrift (Refereegranskat)
  • 157. Engholm, M
    et al.
     Norin, L
    RISE., Swedish ICT, Acreo.
    Strong UV-absorption visible luminescence in ytterbium-doped aluminosilicate glass under UV-excitation2007Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, s. 3352-54Artikel i tidskrift (Refereegranskat)
  • 158. Engholm, M
    et al.
    Norin, L
    RISE., Swedish ICT, Acreo.
    Edvardsson, S
    Lashgari, K
    Westin, G
    A structural investigation of a synthesized precursor for optical fiber applications, the heterobimetallic ErNb2(OPri)132006Ingår i: Optical Materials, Vol. 29, nr 4, s. 386-91Artikel i tidskrift (Refereegranskat)
  • 159.
    Ericson, C
    et al.
    RISE., Swedish ICT, Acreo.
    Holm, J
    RISE., Swedish ICT, Acreo.
    Ericson, T
    RISE., Swedish ICT, Acreo.
    Hjerten, S
    RISE., Swedish ICT, Acreo.
    Electroosmosis- Pressure-Driven Chromatography in Chips Using Continuous Beds2000Ingår i: Analytical Chemistry, Vol. 72, nr 1, s. 81-Artikel i tidskrift (Refereegranskat)
  • 160.
    Eriksson , P
    RISE., Swedish ICT, Acreo.
    Theoreticalexperimental investigation of interferometric absorbersfor thermal infrared detectors1999Ingår i: Sensor Materials, Vol. 9, nr 2Artikel i tidskrift (Refereegranskat)
  • 161.
    Eriksson , P
    RISE., Swedish ICT, Acreo.
    Thermal characterization of surface micromachined silicon nitride membranes for thermal infrared detectors1999Ingår i: Journal of Micromechanical Systems, Vol. 6, nr 1Artikel i tidskrift (Refereegranskat)
  • 162. Eriksson, T
    et al.
    Blomgren, J
    RISE., Swedish ICT, Acreo.
    Winkler, D
    An HTS SQUID picovoltmeter used as preamplifier for Rogowski coil sensors2002Ingår i: Physica, Vol. c358, s. 130-Artikel i tidskrift (Refereegranskat)
  • 163. Eriksson, T
    et al.
    Blomgren, J
    RISE., Swedish ICT, Acreo.
    Winkler, D
    Discharge measurements using a HTS-SQUID based amplifier system2001Ingår i: IEEE Trans. Appl. Supercond., Vol. 11, s. 256-Artikel i tidskrift (Refereegranskat)
  • 164.
    Estcheverry, S
    et al.
    RISE., Swedish ICT, Acreo.
    Sudirman, A.
    Laurell, F.
    Margulis, Walter
    RISE., Swedish ICT, Acreo.
    Playing cellular Golf in microstructured fibres2015Ingår i: Workshop on Specialty Optical Fibers and their Applications, WSOF 2015, 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    We illuminate particles in a solution using fibers with cladding holes. Particles sufficiently near the fiber tip and with the correct optical signature are collected into the holes with good specificity, mimicking cell-collection for diagnostics.

  • 165. Esteve, R
    et al.
    Schöner, A
    RISE., Swedish ICT, Acreo.
      Reshanov, S A
     Zetterling, C-M  
    Comparative study of thermal oxides post-oxidized deposited oxides on n-type free standing 3C-SiC2010Ingår i: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 645-648, s. 829-32Artikel i tidskrift (Refereegranskat)
  • 166. Etcheverry, S.
    et al.
    Faridi, A.
    Ramachandraiah, H.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Laurell, F.
    Russom, A.
    All fiber based micro-flow cytometer by combining optical fiber with inertial focusing2016Ingår i: 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016, 2016, s. 1655-1656Konferensbidrag (Refereegranskat)
    Abstract [en]

    Towards a portable point of care flow cytometry platform, we present here an integrated all optical fiber-based optofluidic system capable of counting and discriminating fluorescent particles and cells. The robust and compact device incorporates optical fibers and circular capillaries to build an all-fiber optofluidic device to enable counting particles based on their fluorescent and back-scatter light emission. Here, we combine this with inertial- and elasto-inertial microfluidics for sheathless particle and cell focusing for integrated detection with scattering and fluorescence detections - all necessary components of standard cytometers. We validated the system for cell counting based on scattering and fluorescence.

  • 167.
    Etcheverry, S.
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Margulis, W.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe2018Ingår i: Conference on Lasers and Electro-Optics OSA Technical Digest (online) (Optical Society of America, 2018), paper AM4P.6, 2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    A fiber probe traps single micrometer-particles by fluid suction into a hollow microstructure and enables optical identification by the fluorescence light collected in a fiber core. The probe finds applications in life-science and environmental monitoring.

  • 168.
    Etcheverry, S
    et al.
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Sudirman, A
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Margulis, W
    RISE., Swedish ICT, Acreo.
    Laurell, F
    Identification and collection of particles with optical fibers2015Ingår i: paper 9540-26, European Conferences on Biomedical Optics ECBO 2015, Munich, 2015., 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    A micro-structured fiber-based system for identification and collection of fluorescent particles is demonstrated. An optical fiber probe with longitudinal holes in the cladding is used to retrieve fluorescent particles by exerting microfluidics forces. Laser induced fluorescent (LIF) is carried out by the fiber probe and an optical setup. When a particle with a previously chosen fluorescence wavelength is identified, a vacuum pump is activated collecting the particle into a hole. Green and red fluorescent polystyrene particles were detected and selectively retrieved.

  • 169.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Araujo, Leonardo F.
    Pontifícia Universidade Católica do Rio de Janeiro (PUC-RIO), Brazil.
    Carvalho, Isabel C. S.
    Pontifícia Universidade Católica do Rio de Janeiro (PUC-RIO), Brazil.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fontana, Jake
    Naval Research Laboratory, US.
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber2017Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, nr 22, artikel-id 221108Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 ns. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide opportunities for remote sensing and signaling applications. © 2017 Author(s).

  • 170.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Araujo, Leonardo F.
    Pontificia Universidade Católica do Rio de Janeiro, Brazil.
    da Costa, Greice K. B.
    Rural Federal University of Rio de Janeiro, Brazil.
    Pereira, Joao M. B.
    Pontificia Universidade Católica do Rio de Janeiro, Brazil.
    Camara, Alexandre R.
    Universidade do Estado do Rio de Janeiro, Brazil.
    Naciri, Jawad
    Naval Research Laboratory, USA.
    Ratna, Banahalli R.
    Naval Research Laboratory, USA.
    Hernández-Romano, Ivan
    University of Guanajuato, Mexico;Mackenzie Presbyterian University, Brazil.
    de Matos, Cristiano J. S.
    Mackenzie Presbyterian University, Brazil.
    Carvalho, Isabel C. S.
    Pontificia Universidade Católica do Rio de Janeiro, Brazil.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fontana, Jake
    Naval Research Laboratory, USA.
    Microsecond switching of plasmonic nanorods in an all-fiber optofluidic component2017Ingår i: Operator Theory: Advances and Applications, ISSN 1004-4469, E-ISSN 2334-2536, Vol. 4, nr 8, s. 864-870Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As information technologies move from electron- to photon-based systems, the need to rapidly modulate light is of paramount importance. Here, we study the evolution of the electric-field-induced alignment of gold nanorods suspended in organic solvents. The experiments were performed using an all-fiber optofluidic device, which enables convenient interaction of light, electric fields, and the nanorod suspension. We demonstrate microsecond nanorod switching times, three orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein–Smoluchowski relationship, allowing for the determination of the rotational diffusion coefficient and polarizability anisotropy of the nanorods as well as the effective length of the ligands capping the nanorods. The ability to dynamically control the optical properties of these plasmonic suspensions coupled with the point-to-point delivery of light from the fiber component, as demonstrated in this work, may enable novel ultrafast optical switches, filters, displays, and spatial light modulators.

  • 171.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Faridi, A.
    KTH Royal Institute of Technology, Sweden.
    Ramachandraiah, H.
    KTH Royal Institute of Technology, Sweden.
    Kumar, T.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    High performance micro-flow cytometer based on optical fibres2017Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, nr 1, artikel-id 5628Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres. Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee accurate and sensitive detection. The capability of this technique is extended to high flow rates (up to 800 μl/min), enabling a throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems. © 2017 The Author(s).

  • 172.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fluidic trapping and optical detection of microparticles with a functional optical fiber2017Ingår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, nr 26, s. 33657-33663Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A fiber probe is presented that traps single micro-sized particles and allows detection of their optical properties. The trapping mechanism used is based on fluid suction with a micro-structured optical fiber that has five holes along its cladding. Proof-of-principle experiments with a diluted solution of fluorescently labeled particles are performed. The fiber probe presented here may find various applications in life-science and environmental monitoring. ©

  • 173. Evekull, D
    et al.
    Johansson, S
    Olson, M
    Koch, R
    RISE., Swedish ICT, Acreo.
    Laurell, F
    Polymer encapsulated miniature Nd:YAG lasers2003Ingår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 39, s. 1446-48Artikel i tidskrift (Refereegranskat)
  • 174. Evekull, D
    et al.
    Rydholm, J
    Bjurshagen, S
    Bäcklin, L
    Kindlundh, M
    Kjellberg, L
    Koch, R
    RISE., Swedish ICT, Acreo.
    Olson, M
    High power Q-switched Nd:YAG laser mounted in a silicon microbench2004Ingår i: Optics Laser Technolog, Vol. 36, nr 5, s. 383-86Artikel i tidskrift (Refereegranskat)
  • 175. Fabrega, JM
    et al.
    Schrenk, B
    Bonada, F
    Lazaro, JA
    Forzati, M
    RISE., Swedish ICT, Acreo.
    Rigole, P-J
    Prat, J
    Modulated Grating Y-Structure Tunable Laser for ?-Routed Networks Optical Access2011Ingår i: IEEE Journal of Selected Topics in Quantum Electronics, Vol. 17, nr 6, s. 1552-Artikel i tidskrift (Refereegranskat)
  • 176. Fanjoux, G.
    et al.
    Sudirman, A.
    RISE., Swedish ICT, Acreo.
    Beugnot, J. C.
    Furfaro, L.
    Margulis, Walter
    RISE., Swedish ICT, Acreo.
    Sylvestre, T.
    Towards supercontinuum generation by stimulated Raman-Kerr scattering in an integrated nonlinear liquid core fiber2014Ingår i: Optics InfoBase Conference Papers, 2014Konferensbidrag (Refereegranskat)
  • 177. Fanjoux, G
    et al.
    Sudirman, A
    Beugnot, J-C
    Furfaro, L
    Margulis, W
    RISE., Swedish ICT, Acreo.
    Sylvestre, T
    Stimulated Raman-Kerr scattering in an integrated nonlinear optofluidic fiber arrangement2014Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 39, nr 18Artikel i tidskrift (Refereegranskat)
  • 178. Ferguson, RM
    et al.
    Khandhar, A
    Jonasson, C
    Blomgren, J
    RISE., Swedish ICT, Acreo.
    Johansson, C
    RISE., Swedish ICT, Acreo.
    Krishnan, KM
    Size-Dependent Relaxation Properties of Monodisperse Magnetite Nanoparticles Measured Over Seven Decades of Frequency by AC Susceptometry2013Ingår i: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 49, s. 3441-3444Artikel i tidskrift (Refereegranskat)
  • 179. Fernandez Fernandez, A
    et al.
    Brichard, B
    Berghmans, F
    El Rabii, H
    Fokine, M
    Popov, M
    RISE., Swedish ICT, Acreo.
    Chemical Composition Fiber Gratings in a High Mixed Gamma Neutron Radiation Field2006Ingår i: IEEE Transactions on Nuclear Scienc, Vol. 53, nr 3, s. 1607-13Artikel i tidskrift (Refereegranskat)
  • 180. Fiorani, M
    et al.
    Skubic, B
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
    Valcarenghi, L
    Castoldi, P
    Wosinska, L
    Monti, P
    On the design of 5G transport networks2015Ingår i: Photonic network communications, ISSN 1387-974X, E-ISSN 1572-8188, Vol. 30, nr 3, s. 403-Artikel i tidskrift (Refereegranskat)
  • 181. Fiorani, M.
    et al.
    Tombaz, S.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Skubic, B.
    Wosinska, L.
    Monti, P.
    Energy performance of C-RAN with 5G-NX radio networks and optical transport2016Ingår i: 2016 IEEE International Conference on Communications, ICC 2016, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Each mobile network architecture able to meet the traffic requirements of future 5G services comes with its own set of benefits vs. requirements for the radio and the transport segments. This paper focuses on the energy performance of four mobile network architectures, each one with different splitting options for the baseband processing functions. The radio segment under exam is based on a new radio access technology referred to as 5G-NX, while the transport segment is based on wavelength division multiplexing (WDM). The energy consumption of each mobile network architecture is weighted against (i) the benefits for the radio segment as a function of the level of centralization of the baseband processing resources and (ii) the required transport capacity and consequently the power consumption levels needed to accommodate the backhaul, midhaul, and/or fronthaul traffic generated at each base station. Our results show that a fully centralized radio access network (C-RAN) with centralization of all the baseband functions is not a practical approach for 5G mobile networks, while a partially centralized C-RAN architecture in which the physical layer baseband processing is performed at the base station site represents a promising solution.

  • 182.
    Fiorani, Matteo
    et al.
    KTH Royal Institute of Technology, Sweden..
    Tombaz, Sibel
    Ericsson Research, Sweden..
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Skubic, Björn
    Ericsson Research, Sweden..
    Wosinska, Lena
    KTH Royal Institute of Technology, Sweden..
    Monti, Paolo
    KTH Royal Institute of Technology, Sweden..
    Modeling energy performance of C-RAN with optical transport in 5G network scenarios2016Ingår i: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 8, nr 11, s. B21-B34Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The deployment of new 5G wireless interfaces based on massive multiantenna transmission and beamforming is expected to have a significant impact on the complexity and power consumption of the transport network. This paper analyzes the energy performance of four radio access network (RAN) architectures, each one utilizing a different option for splitting the baseband processing functions. The radio segment is based on Long-Term Evolution (LTE) and 5G radio access technologies. The transport segment is based on optical wavelength division multiplexing, where coherent and direct detection transmissions are considered. The energy consumption of each RAN architecture is weighted against i) the benefits for the radio segment as a function of the level of centralization of the baseband processing functions and ii) the power consumption levels needed to accommodate the capacity generated at each base station. Results show that, with LTE radio interfaces, the energy consumption of the transport network amounts to only a few percent of the overall network power consumption. As a result, fully centralized LTE radio architectures are a viable option, with energy savings of at least 27% compared with conventional distributed architectures. On the other hand, with advanced 5G radio interfaces, centralized architectures, if not carefully designed, might become impractical due to the excessive energy consumption of the transport network (i.e., as a result of the huge capacity to be accommodated). This aspect can be mitigated via a careful joint design of the radio and the transport network (i.e., leveraging on appropriate optical transmission techniques and compromising where needed on the radio network performance).

  • 183. Fiorarli, M.
    et al.
    Monti, P.
    Skubic, B.
    Martensson, J.
    RISE., Swedish ICT, Acreo.
    Valcarenghi, L.
    Castoldi, P.
    Wosinska, L.
    Challenges for 5G transport networks2014Ingår i: 2014 IEEE International Conference on Advanced Networks and Telecommunication Systems, ANTS 2014, 2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    5G mobile communications is seen as the enabler for the networked society where connectivity will be available anywhere and anytime to anyone and anything. The details of 5G are the subject to ongoing research and debate, mostly focused on understanding radio technologies that can enable the 5G vision. So far, less work has been dedicated to the challenges that 5G will pose to the transport network. This paper provides a first analysis of the key challenges to 5G transport in terms of capacity, flexibility and costs, for example. Different use cases are discussed as well as technology options and control plane concepts.

  • 184.
    Fock, Jeppe
    et al.
    DTU Technical University of Denmark, Denmark .
    Jonasson, Christian
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Johansson, Christer
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Hansen, Mikkel F.
    DTU Technical University of Denmark, Denmark .
    Characterization of fine particles using optomagnetic measurements2017Ingår i: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 19, nr 13, s. 8802-8814Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The remanent magnetic moment and the hydrodynamic size are important parameters for the synthesis and applications of magnetic nanoparticles (MNPs). We present the theoretical basis for the determination of the remanent magnetic moment and the hydrodynamic size of MNPs with a narrow size distribution using optomagnetic measurements. In these, the 2nd harmonic variation of the intensity of light transmitted through an MNP suspension is measured as a function of an applied axial oscillating magnetic field. We first show how the measurements of the optomagnetic signal magnitude at a low frequency vs. magnetic field amplitude can be used to determine the MNP moment. Subsequently, we use linear response theory to describe the dynamic non-equilibrium response of the MNP suspension at low magnetic field amplitudes and derive a link between optomagnetic measurements and magnetic AC susceptibility measurements. We demonstrate the presented methodology on two samples of commercially available multi-core MNPs. The results compare well with those obtained by dynamic light scattering, AC susceptibility and vibrating sample magnetometry measurements on the same samples when the different weighting of the particle size in the techniques is taken into account. The optomagnetic technique is simple, fast and does not require prior knowledge of the concentration of MNPs and it thus has the potential to be used as a routine tool for quality control of MNPs.

  • 185.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Formation of thermally stable chemical composition gratings in optical fiber2002Ingår i: Journal of the Optical Society of America B (Optical Physics, Vol. 19, s. 1759-Artikel i tidskrift (Refereegranskat)
  • 186.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Growth dynamics of chemical composition gratings in optical fiber2002Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, s. 1974-76Artikel i tidskrift (Refereegranskat)
  • 187.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    High temperature miniature oven with low thermal gradient for processing fiber Bragg gratings2001Ingår i: Review of Scientific Instrument, Vol. 72, nr 8, s. 3458-Artikel i tidskrift (Refereegranskat)
  • 188.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Laser induced sub-micron changes of the chemical composition of SiO2-based optical fibers2003Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    A method to create sub-micron changes of the chemical composition of silica based optical fibers is reviewed. The method is used to create thermally stable refractive index structures, Fiber Bragg gratings, which can be used e.g. as sensors operating at very high temperatures. The method is based on UV induced chemical reactions of the silica glass with in-diffused molecular hydrogen. A change in the chemical composition is attained after thermal treatment, and the mechanism is attributed to diffusion of hydrogen compounds within the glass.

  • 189.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Thermal stability of chemical composition gratings in optical fiber2002Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, s. 1016-18Artikel i tidskrift (Refereegranskat)
  • 190.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Thermal stability of oxygen-modulated gratings in standard telecommunication fiber2004Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 29, nr 11, s. 1185-87Artikel i tidskrift (Refereegranskat)
  • 191.
    Fokine, M
    RISE., Swedish ICT, Acreo.
    Underlying mechanisms, applications, limitations of chemical composition gratings in silica based fibers2004Ingår i: Journal of Non-Crystalline Solids, Vol. 349, s. 98-104Artikel i tidskrift (Refereegranskat)
  • 192. Fokine, M
    et al.
    Margulis, W
    RISE., Swedish ICT, Acreo.
    Large increase in photosensitivity through massive hydroxyl formation2000Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 25, nr 5, s. 302-Artikel i tidskrift (Refereegranskat)
  • 193.
    Fokine, M
    et al.
    RISE., Swedish ICT, Acreo.
    Nilsson, LE
    Claesson, Å
    RISE., Swedish ICT, Acreo.
    Berlemont, D
    Kjellberg, L
    Krummenacher, L
    Margulis, W
    RISE., Swedish ICT, Acreo.
    Integrated fiber Mach Zehnder interferometer for electro-optic switching2002Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, nr 18, s. 1643-45Artikel i tidskrift (Refereegranskat)
  • 194. Fonnum, G
    et al.
    Johansson, C
    RISE., Swedish ICT, Acreo.
    Molteberg, A
    Aksnes, E
    Characterization of Dynabeads® by magnetization measurements Mössbauer spectroscopy2005Ingår i: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 293, s. 41-47Artikel i tidskrift (Refereegranskat)
  • 195.
    Foote, P
    et al.
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Breidne, M
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Levin, K
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Papadopolous, P
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Read, I
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Signorazzi, M
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Nilsson, L-E
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Stubbe, R
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Claesson, Å
    RISE., Swedish ICT, Acreo, Fiber Optics.
    Operational load monitoring using optical fibre sensors2004Ingår i: Health monitoring of aerospace structures: Smart sensor technologies and signal processing / [ed] Staszewski, W., Boller, C., and Tomlinson, G., West Sussex, England: John Wiley & Sons, 2004Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 196. Fornara, A
    et al.
    Johansson, P
    RISE., Swedish ICT, Acreo.
    Petersson, K
    Gustafsson, S
    Qin, J
    Olsson, E
    Ilver, D
    RISE., Swedish ICT, Acreo.
    Krozer, A
    RISE., Swedish ICT, Acreo.
    Muhammed, M
    Johansson, C
    RISE., Swedish ICT, Acreo.
    Tailored Magnetic Nanoparticles for Direct Sensitive Detection of Biomolecules in Biological Samples2008Ingår i: Nano Letters, Vol. 8, nr 10, s. 3423-28Artikel i tidskrift (Refereegranskat)
  • 197.
    Fortes Brollo, Maria Eugenia
    et al.
    CSIC Institute of Material Science of Madrid, Spain.
    Hernández Flores, Patricia
    CSIC Centro Nacional de Biotecnología, Spain.
    Gutiérrez, Lucía
    INA Instituto Universitario de Nanociencia de Aragón, Spain.
    Johansson, Christer
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Barber, Domingo Francisco
    CSIC Centro Nacional de Biotecnología, Spain.
    Morales, María Del Puerto
    CSIC Institute of Material Science of Madrid, Spain.
    Magnetic properties of nanoparticles as a function of their spatial distribution on liposomes and cells2018Ingår i: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 20, nr 26, s. 17829-17838Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aggregation processes of magnetic nanoparticles in biosystems are analysed by comparing the magnetic properties of three systems with different spatial distributions of the nanoparticles. The first one is iron oxide nanoparticles (NPs) of 14 nm synthesized by coprecipitation with two coatings, (3-aminopropyl)trimethoxysilane (APS) and dimercaptosuccinic acid (DMSA). The second one is liposomes with encapsulated nanoparticles, which have different configurations depending on the NP coating (NPs attached to the liposome surface or encapsulated in its aqueous volume). The last system consists of two cell lines (Pan02 and Jurkat) incubated with the NPs. Dynamic magnetic behaviour (AC) was analysed in liquid samples, maintaining their colloidal properties, while quasi-static (DC) magnetic measurements were performed on lyophilised samples. AC measurements provide a direct method for determining the effect of the environment on the magnetization relaxation of nanoparticles. Thus, the imaginary (χ'') component shifts to lower frequencies as the aggregation state increases from free nanoparticles to those attached or embedded into liposomes in cell culture media and more pronounced when internalized by the cells. DC magnetization curves show no degradation of the NPs after interaction with biosystems in the analysed timescale. However, the blocking temperature is shifted to higher temperatures for the nanoparticles in contact with the cells, regardless of the location, the incubation time, the cell line and the nanoparticle coating, supporting AC susceptibility data. These results indicate that the simple fact of being in contact with the cells makes the nanoparticles aggregate in a non-controlled way, which is not the same kind of aggregation caused by the contact with the cell medium nor inside liposomes.

  • 198.
    Forzati, M
    et al.
    RISE., Swedish ICT, Acreo.
    Berntson, A
    RISE., Swedish ICT, Acreo.
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
    IFWM Suppression Using APRZ with Optimized Phase-Modulation Parameters2004Ingår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 16, s. 2368-70Artikel i tidskrift (Refereegranskat)
  • 199.
    Forzati, M
    et al.
    RISE., Swedish ICT, Acreo, Broadband Technology.
    Berntson, A
    RISE., Swedish ICT, Acreo, Broadband Technology.
    Mårtensson, J
    RISE., Swedish ICT, Viktoria.
    Polarisation Modulation Scheme for intra-channel non-linear suppression2007Patent (Övrig (populärvetenskap, debatt, mm))
  • 200.
    Forzati, M
    et al.
    RISE., Swedish ICT, Acreo.
    Berntson, A
    RISE., Swedish ICT, Acreo.
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
    Davies, RJ
    Performance Analysis of Single-MZM APRZ Transmitters2006Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 24, s. 2006-14Artikel i tidskrift (Refereegranskat)
1234567 151 - 200 av 818
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.4