Results 71 to 80 of about 83,036 (231)
steel research international, EarlyView.By applying solution heat treatment after plasma nitriding, followed by requenching and tempering, researchers successfully obtained nitrogen‐rich martensite on AISI 409. This study compares the intergranular corrosion resistance and hardness of nitrogen‐rich martensite in AISI 409 with carbon‐rich martensite in AISI 420.
Pedro Victorio Caetano Abrantes Quadros +2 more
wiley +1 more source
Modulation-mode and power-assignment for SVD-and GMD-assisted downlink MIMO systems [PDF]
, 2010 Multiuser multiple-input multiple-output (MIMO) downlink (DL) transmission schemes experience both multiuser interference (MUI) as well as inter-antenna interference.
Ahrens, Andreas +2 more
core +1 more source
Channel Estimation And Multiuser Detection In Asynchronous Satellite Communications
, 2010 In this paper, we propose a new method of channel estimation for asynchronous additive white Gaussian noise channels in satellite communications.
Bouallegue, Ridha, Chaouech, Helmi
core +1 more source
Exploiting Opportunistic Multiuser Detection in Decentralized Multiuser MIMO Systems [PDF]
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference, 2009 This paper studies the design of a decentralized multiuser multi-antenna (MIMO) system for spectrum sharing over a fixed narrow band, where the coexisting users independently update their transmit covariance matrices for individual transmit-rate maximization via an iterative manner.
Zhang, R., Cioffi, J.M.
openaire +3 more sources
British Journal of Pharmacology, EarlyView.Abstract Background and Purpose Plasma glucocorticoids increase acutely after MI, thereafter tissue levels are amplified selectively within cells expressing 11‐ßhydroxysteroid dehydrogenase type 1 (11‐ßHSD1) that regenerates active glucocorticoids from circulating metabolites.
Sara Al Disi +19 more
wiley +1 more source
Dental Traumatology, EarlyView.ABSTRACT Background/Aim Bi‐colored mouthguards (MTG) are often sought by both professional and amateur athletes. Bi‐colored MTG can be made in the dental office from premanufactured bi‐colored EVA sheets or custom‐designed in the dental office for greater color variety.
Luiz Felipe Rodrigues Siqueira +4 more
wiley +1 more source
Multiuser Space–Time Line Code With Transmit Antenna Selection
IEEE Access, 2020 In this paper, a multiuser space-time line code (MU-STLC) scheme is newly designed that concurrently delivers multiple STLC signals to multiple users, and a preprocessing matrix for the MU-STLC is derived based on the minimum mean square error criterion.
Jingon Joung, Jihoon Choi
doaj +1 more source
Joint Altitude and Beamwidth Optimization for UAV-Enabled Multiuser Communications [PDF]
IEEE Communications Letters, 2017 We study multiuser communication systems enabled by an unmanned aerial vehicle (UAV) that is equipped with a directional antenna of adjustable beamwidth.
Haiyun He +3 more
semanticscholar +1 more source
Assessing Clinical Competence of Postgraduate Dental Specialty Trainees: A Scoping Review
European Journal of Dental Education, EarlyView.ABSTRACT Background Assessment is essential to ensure that trainees meet competency standards in delivering patient care. However, a comprehensive summary of the literature on clinical assessment in postgraduate dental education is largely absent. Filling this gap is essential for developing effective assessment processes to help support competency ...
Fatemeh Amir‐Rad +4 more
wiley +1 more source
IEEE Access, 2020 The estimation of carrier frequency offset (CFO) is a challenging issue in uplink orthogonal frequency division multiple access (OFDMA) systems. Many estimation methods have been proposed in the past.
Shih-Sheng Li, See-May Phoong
doaj +1 more source