Results 11 to 20 of about 31,714 (226)

Electron-Mediator-Free Microfluidic Photocatalytic Coenzyme Regeneration with 100% Conversion Efficiency within 126 S. [PDF]

Adv Sci (Weinh)
Discover a groundbreaking mediator‐free photocatalytic method for coenzyme NAD(P)H regeneration using BiOBr nanosheets in a microfluidic chip. This study achieves 100% NAD+ to NADH conversion in 126 s, maintaining >87% efficiency over 32 h. Explore how photocatalysis and microfluidics combine to offer a sustainable, scalable solution for green ...
Chai Y, Wan L, Pang Z, Li X, Jia Z, Jiang H, Tsoi CC, Jia H, Shen J, Zhang Z, Long J, Xie F, Chen Y, Zhang X.   +13 more
europepmc   +2 more sources

Prescribed Medication Burden by Tobacco Smoking and E-Cigarette Use Status. [PDF]

Health Sci Rep
ABSTRACT Purpose Tobacco smoking is a major driver of chronic disease, and e‐cigarette use is increasingly common, yet their associations with prescribed medication burden remain unclear. Methods We analysed data from 1657 adults aged ≥ 16 years who completed a nurse visit in the Health Survey for England 2021.
Adebisi YA, Uzairue LI, Farayola RO, Iyagbaye E, Ong CJN, Benson AE, Muzondo NV, Temitope AD.   +7 more
europepmc   +2 more sources

Multi-user MIMO CDMA systems using complete complementary sequences. [PDF]

, 2006
The authors propose a novel use of complete complementary (CC) sequences for increased spectral efficiency in a multiple-input–multiple-output (MIMO) code division multiple access (CDMA) system.
Khirallah, C., Rashvand, H. F., Coulton, P., Zein, N., Rashvand, P., Coulton, Paul   +5 more
core   +1 more source

DS-CDMA microcellular networks with adaptive antennas [PDF]

, 1996
This paper considers the performance of a DS-CDMA system which employs adaptive antenna technology at the basestation site of a microcell. Results for a typical microcellular environment produced with the help of a ray tracing tool highlight the ...
Tsoulos, G, Beach, MA
core   +1 more source

Blind Joint Soft-Detection Assisted Slow Frequency-Hopping Multicarrier DS-CDMA [PDF]

, 2000
A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band ...
Lie-Liang Yang, L. Hanzo, Yang, L-L., Hanzo, L.   +3 more
core   +1 more source

MULTICHANNEL M-ARY BI-ORTHOGONAL KEYING

Information and Telecommunication Sciences, 2015
The new method of Multichannel M-ary Bi-Orthogonal Keying, its operating principle and performance studying are introduced in this paper. Utilized spectral efficiency and BER performance of this method are also studied in comparison with DS-CDMA. Overall
Kateryna P. Kovalchuk, Oleksandr V. Mazurenko   +1 more
doaj   +1 more source

Detection Schemes With Low-Resolution ADCs and Spatial Oversampling for Transmission With Higher-Order Constellations in Terahertz Band

IEEE Access
In this work, we consider Terahertz (THz) communications with low-resolution uniform quantization and spatial oversampling at the receiver side, corresponding to a single-input multiple-output (SIMO) transmission.
Christian Forsch, Peter Zillmann, Osama Alrabadi, Stefan Brueck, Wolfgang Gerstacker   +4 more
doaj   +1 more source

Spreading Code Design for a MC-CDMA Based GNSS Pilot Signal [PDF]

, 2010
MC-CDMA can represent an alternative to classical DS-CDMA for the design of GNSS ranging signals. A first requirement MC-CDMA signals must fulfill is that their generation on a satellite payload be feasible.
Meurer, Michael, Seco-Granados, Gonzalo, Vergara, Mariano, Felix Antreich, Gonzalo Seco-Granados, Antreich, Felix, Mariano Vergara, Michael Meurer   +7 more
core   +1 more source

ENHANCEMENT OF CODE DIVISION MULTIPLE ACCESS (CDMA) WITHIN THE GSM SYSTEM IN IRAQ

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ
Despite the widespread adoption of Global System for Mobile Communications (GSM) in Iraq, the network's capacity and performance limitations have become increasingly apparent, particularly in urban areas with high user density. Currently, LTE (4G) is the
Nabil Abdulwahab Abdulrazaq Baban
doaj   +1 more source

Performance evaluation of carrier interferometry implementations of MC-CDMA over a wideband channel suffering phase noise [PDF]

, 2005
In this paper the performance of Carrier Interferometry (CI) and Pseudo-Orthogonal Carrier Interferometry (PO-CI) [1] implementations of Multi-Carrier Code Division Multiple Access (MC-CDMA) are investigated.
Taylor, N, Cooper, MA, McGeehan, JP, Armour, SMD   +3 more
core   +1 more source