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Now showing items 2252-2271 of 3130
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Phase Transitions in Pure and Hybrid Hydrogels: A Fluorescence Study
(Wiley, 2009)Recent observations on phase transitions around the critical point showed that the critical exponents differed drastically from percolation results and classical results for pure hydrogel systems depending on monomer ... -
Phase transitions of the variety of random-field Potts models
(Elsevier, 2021)The phase transitions of random-field q-state Potts models in d = 3 dimensions are studied by renormalization-group theory by exact solution of a hierarchical lattice and, equivalently, approximate Migdal-Kadanoff solutions ... -
Phenolic Profile, Antioxidant and Enzyme Inhibitory Activities of Leaves from Two Cassia and Two Senna Species
(Mdpi, 2022)Several species within the genera Cassia or Senna have a treasure of traditional medicines worldwide and can be a promising source of bioactive molecules. The objective of the present study was to evaluate the phenolic ... -
Philosophical concerns in fine arts education
(Elsevier Science Bv, 2012)Due to the rapid changes in society it is increasingly important to ask why we teach the way we do which teaching methods we should adopt and which we should reject or abandon. As a result it is crucial that philosophical ... -
Photolithography-Based Microfabrication of Biodegradable Flexible and Stretchable Sensors
(Wiley-V C H Verlag Gmbh, 2023)Biodegradable sensors based on integrating conductive layers with polymeric materials in flexible and stretchable forms have been established. However, the lack of a generalized microfabrication method results in large-sized, ... -
Physical Layer Security for Multi-User MIMO Visible Light Communication Systems with Generalized Space Shift Keying
(Institute of Electrical and Electronics Engineers Inc., 2021)We consider the physical layer security (PLS) of multi-user (MU) multiple-input-multiple-output visible light communication (VLC) systems with an eavesdropper (Eve) and propose a novel spatial constellation design technique ... -
Physical Layer Security Under the Effect of Dimming in Visible Light Communications
(IEEE, 2023)Visible Light Communication (VLC) is a promising option for 6G wireless systems to increase performance and provide a high-speed data rate compared to radio frequency (RF). Dimming control is one of the most important ... -
Physical-Layer Security in 6G Networks
(IEEE-Inst Electrical Electronics Engineers Inc, 2021)The sixth generation (6G) of mobile network will be composed by different nodes, from macro-devices (satellite) to nano-devices (sensors inside the human body), providing a full connectivity fabric all around us. These ... -
Physical-layer security in visible light communications
(Institute of Electrical and Electronics Engineers Inc., 2020)Optical wireless communications (OWC) and its potential to solve physical layer security (PLS) issues are becoming important research areas in 6G communications systems. In this paper, an overview of PLS in visible light ... -
Physical-Layer Security With Optical Generalized Space Shift Keying
(Ieee-Inst Electrıcal Electronıcs Engıneers Inc, 2020)Spatial modulation (SM) is a promising technique that reduces inter-channel interference while providing high power efficiency and detection simplicity. In order to ensure the secrecy of SM, precoding and friendly jamming ... -
Pilot assisted channel estimation for asymmetrically clipped optical OFDM over visible light channels
(Institute of Electrical and Electronics Engineers Inc., 2017)The Visible Light Communication(VLC) has drawn significant attention recently for wireless communication in addressing the performance limitations of wireless systems due to the scarcity of bandwidth. In VLC system the ... -
Pilot Symbol Aided Channel Estimation for Spatial Modulation-OFDM Systems and its Performance Analysis with Different Types of Interpolations
(Springer, 2017)Spatial modulation orthogonal frequency division multiplexing (SM-OFDM) system has been recently proposed as an alternative for multiple-input multiple-output (MIMO)-OFDM systems to increase spectral efficiency by keeping ... -
Pilot Symbol Assisted Channel Estimation for 4x4 Space Time Block Coded Spatial Modulation Systems
(IEEE, 2015)Recently spatial modulation (SM) and space-time block coding (STBC) are combined to take advantage of the benefits of both while avoiding their drawbacks for multiple-input and multiple-output (MIMO) systems. The pioneering ... -
Pilot-aided bayesian MMSE channel estimation for OFDM systems: Algorithm and performance analysis
(2004)This paper proposes a computationally efficient pilot-aided minimum mean square error (MMSE) channel estimation algorithm for OFDM systems. The proposed approach employs a convenient representation of the discrete multipath ... -
Policies and Variables affecting FDI: A Panel Data Analysis of North African Countries
(2020)North Africa region is one of the wealthiest areas due to its natural resources and strategic location. But, it is still fragile according to economic indicators, especially investment environment and foreign direct ... -
Policies of media and cultural integration in Germany: From guestworker programmes to a more integrative framework
(Sage Publications Ltd, 2014)After the arrival of the first labour migrants in Germany in the 1960s a gradual change in the perception of migrants in German politics took place: from guests (Gastarbeiter) and foreigners (Ausländer) to citizens as ... -
Policy tools and the attributes of effectiveness: Spaces, mixes and instruments
(Taylor and Francis, 2022)[No abstract available] -
The political consequences of dependent financialization: Capital flows, crisis and the authoritarian turn in Turkey
(Routledge Journals, Taylor & Francis Ltd, 2023)Recent debates on financialization in emerging market economies highlight the terms of unequal exchange that they are embedded in, where international capital flows steered by powerful financial actors and transnationalized ... -
The Political Dynamics of R&D Policy in Turkey: Party Differences and Executive Interference during the AKP Period
(Routledge Journals Taylor & Francis Ltd, 2018)This article examines the political dynamics of R&D policy in Turkey during the Justice and Development Party (Adalet ve Kalknma Partisi AKP) period. Drawing on interviews and other sources the article argues that R&D ... -
The Political Economic Sources of Policy Non-design, Policy Accumulation, and Decay in Policy Capacity
(Sage Publications Inc, 2023)This article problematizes the political economic drivers of policy (non-)design, instrument choice, and how prolonged non-design could trigger policy accumulation with serious implications for policy capacity. Focusing ...