662 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of PotsdamDE34 papers
- University of HelsinkiFI26 papers
- Aalto UniversityFI23 papers
- Tampere UniversityFI18 papers
- Centre National de la Recherche ScientifiqueFR17 papers
- Northeastern UniversityUS17 papers
- University of JyväskyläFI14 papers
- Brown UniversityUS13 papers
- Technical University of MunichDE13 papers
- Aarhus UniversityDK12 papers
- Helsinki Institute of PhysicsFI10 papers
- Charles UniversityCZ9 papers
41 papers · 1 filter
On Feasibility of 5G-Grade Dedicated RF Charging Technology for Wireless-Powered Wearables
Olga Galinina, Hina Tabassum, Konstantin Mikhaylov +3
For decades, wireless energy transfer and harvesting remained of focused attention in the research community, but with limited practical applications. Recently, with the developmen…
Highly Dynamic Spectrum Management within Licensed Shared Access Regulatory Framework
Aleksei Ponomarenko-Timofeev, Alexander Pyattaev, Sergey Andreev +3
Historical fragmentation in spectrum access models accentuates the need for novel concepts that allow for efficient sharing of already available but underutilized spectrum. The eme…
Comb model with slow and ultraslow diffusion
Trifce Sandev, Alexander Iomin, Holger Kantz +2
We consider a generalised diffusion equation in two dimensions for modeling diffusion on a comb-like structures. We analyse the probability distribution functions and we derive the…
Non-equilibrium phase and entanglement entropy in 2D holographic superconductors via Gauge-String duality
N. S. Mazhari, D. Momeni, R. Myrzakulov +2
An alternative method of developing the theory of non-equilibrium two dimensional holographic superconductor is to start from the definition of a time dependent background.…
Guiding light via geometric phases
Sergei Slussarenko, Alessandro Alberucci, Chandroth P. Jisha +4
Known methods for transverse confinement and guidance of light can be grouped into a few basic mechanisms, the most common being metallic reflection, total internal reflection and…
Performance Analysis of Energy Detection over Mixture Gamma based Fading Channels with Diversity Reception
Omar Alhussein, Ahmed Al Hammadi, Paschalis C. Sofotasios +4
The present paper is devoted to the evaluation of energy detection based spectrum sensing over different multipath fading and shadowing conditions. This is realized by means of a u…
On the Complexity of Rainbow Coloring Problems
Eduard Eiben, Robert Ganian, Juho Lauri
An edge-colored graph is said to be rainbow connected if between each pair of vertices there exists a path which uses each color at most once. The rainbow connection number, de…
First passage time distribution in heterogeneity controlled kinetics: going beyond the mean first passage time
Aljaz Godec, Ralf Metzler
The first passage is a generic concept for quantifying when a random quantity such as the position of a diffusing molecule or the value of a stock crosses a preset threshold (targe…
Understanding the IoT Connectivity Landscape: A Contemporary M2M Radio Technology Roadmap
Sergey Andreev, Olga Galinina, Alexander Pyattaev +6
This article addresses the market-changing phenomenon of the Internet of Things (IoT), which relies on the underlying paradigm of machine-to-machine (M2M) communications to integra…
Light Field Reconstruction Using Shearlet Transform
Suren Vagharshakyan, Robert Bregovic, Atanas Gotchev
In this article we develop an image based rendering technique based on light field reconstruction from a limited set of perspective views acquired by cameras. Our approach utilizes…
K-Means Fingerprint Clustering for Low-Complexity Floor Estimation in Indoor Mobile Localization
Alireza Razavi, Mikko Valkama, Elena-Simona Lohan
Indoor localization in multi-floor buildings is an important research problem. Finding the correct floor, in a fast and efficient manner, in a shopping mall or an unknown universit…
An Introduction to Twisted Particle Filters and Parameter Estimation in Non-linear State-space Models
Juha Ala-Luhtala, Nick Whiteley, Kari Heine +1
Twisted particle filters are a class of sequential Monte Carlo methods recently introduced by Whiteley and Lee to improve the efficiency of marginal likelihood estimation in state-…
Atomic layer deposited second order nonlinear optical metamaterial for back-end integration with CMOS-compatible nanophotonic circuitry
StÉphane Clemmen, Artur Hermans, Eduardo Solano +6
We report the fabrication of artificial unidimensional crystals exhibiting an effective bulk second-order nonlinearity. The crystals are created by cycling atomic layer deposition…
Arrow type impossibility theorems over median algebras
Miguel Couceiro, Stephan Foldes, Gerasimos C. Meletiou
We characterize trees as median algebras and semilattices by relaxing conservativeness. Moreover, we describe median homomorphisms between products of median algebras and show that…
Anomalous, non-Gaussian tracer diffusion in heterogeneously crowded environments
Surya K. Ghosh, Andrey G. Cherstvy, Denis S. Grebenkov +1
A topic of intense current investigation pursues the question how the highly crowded environment of biological cells affects the dynamic properties of passively diffusing particles…
Binding energies of exciton complexes in transition metal dichalcogenides and effect of dielectric environment
Ilkka Kylänpää, Hannu-Pekka Komsa
Excitons, trions, biexcitons, and exciton-trion complexes in two-dimensional transition metal dichalcogenide sheets of MoS, MoSe, MoTe, WS and WSe are studied b…
Facilitation of polymer looping and giant polymer diffusivity in crowded solutions of active particles
J. Shin, A. G. Cherstvy, W. K. Kim +1
We study the dynamics of polymer chains in a bath of self-propelled particles (SPP) by extensive Langevin dynamics simulations in a two dimensional system. Specifically, we analyse…
Compressive Identification of Active OFDM Subcarriers in Presence of Timing Offset
Alireza Razavi, Mikko Valkama, Danijela Cabric
In this paper we study the problem of identifying active subcarriers in an OFDM signal from compressive measurements sampled at sub-Nyquist rate. The problem is of importance in Co…
Quantifying the non-ergodicity of scaled Brownian motion
Hadiseh Safdari, Andrey G. Cherstvy, Aleksei V. Chechkin +3
We examine the non-ergodic properties of scaled Brownian motion, a non-stationary stochastic process with a time dependent diffusivity of the form . We compute…
Self-subdiffusion in solutions of star-shaped crowders: non-monotonic effects of inter-particle interactions
Jaeoh Shin, Andrey G. Cherstvy, Ralf Metzler
We examine by extensive computer simulations the self-diffusion of anisotropic star like particles in crowded two-dimensional solutions. We investigate the implications of the area…
Entropy and Channel Capacity under Optimum Power and Rate Adaptation over Generalized Fading Conditions
Paschalis C. Sofotasios, Sami Muhaidat, Mikko Valkama +2
Accurate fading characterization and channel capacity determination are of paramount importance in both conventional and emerging communication systems. The present work addresses…
ShakeMe: Key Generation From Shared Motion
Hidir Yuzuguzel, Jari Niemi, Serkan Kiranyaz +2
Devices equipped with accelerometer sensors such as today's mobile devices can make use of motion to exchange information. A typical example for shared motion is shaking of two dev…
How Large are Nonadiabatic Effects in Atomic and Diatomic Systems?
Yubo Yang, Ilkka Kylanpaa, Norm Tubman +3
With recent developments in simulating nonadiabatic systems to high accuracy, it has become possible to determine how much energy is attributed to nuclear quantum effects beyond ze…
Compressive Detection of Random Subspace Signals
Alireza Razavi, Mikko Valkama, Danijela Cabric
The problem of compressive detection of random subspace signals is studied. We consider signals modeled as where is an $N \times K…