Results 11 to 20 of about 31,000 (257)

Energy Efficiency of Unmanned Aerial Vehicle with Reconfigurable Intelligent Surfaces: A Comparative Study

Drones, 2023
Unmanned aerial vehicles (UAVs) and reconfigurable intelligent surfaces (RIS) are the promising emerging technologies proposed for the 6th-Generation (6G) network to improve the capacity, reliability, and coverage of wireless communications.
Chi Yen Goh, Chee Yen Leow, Rosdiadee Nordin   +2 more
doaj   +1 more source

STAR-RIS-UAV-Aided Coordinated Multipoint Cellular System for Multi-User Networks

Drones, 2023
Different from conventional reconfigurable intelligent surfaces (RIS), simultaneous transmitting and reflecting RIS (STAR-RIS) can reflect and transmit signals to the receiver. In this paper, to serve more ground users and increase deployment flexibility,
Baihua Shi, Yang Wang, Danqi Li, Wenlong Cai, Jinyong Lin, Shuo Zhang, Weiping Shi, Shihao Yan , Feng Shu   +8 more
doaj   +1 more source

BBD Driven Fabrication of Hydroxyapatite Engineered Risedronate Loaded Thiolated Chitosan Nanoparticles and Their In Silico, In Vitro, and Ex Vivo Studies

Micromachines, 2023
Risedronate sodium (RIS) exhibits limited bioavailability and undesirable gastrointestinal effects when administered orally, necessitating the development of an alternative formulation. In this study, mPEG-coated nanoparticles loaded with RIS-HA-TCS were
Zoya Saifi, Tanya Ralli, Md. Rizwanullah, Meraj Alam, Divya Vohora, Showkat R. Mir, Saima Amin, Sadia Ameen   +7 more
doaj   +1 more source

Enhancing Asia’s trade: price and non-price barriers revisited [PDF]

Journal of International Logistics and Trade, 2010
In a supply-constrained region like Asia, promoting exports has always been a challenge particularly at a time when Asia’s trade has been severely affected by lack of external demand.
Prabir De
doaj   +1 more source

Energy Efficiency Fairness of Active Reconfigurable Intelligent Surfaces-Aided Cell-Free Network

IEEE Access, 2023
Reconfigurable intelligent surface (RIS) has been widely recognized as a promising technique for future wireless communications. Benefiting from its ability to improve channel capacity with low cost and power consumption, the concept of RIS-aided cell ...
Yuhong Wang, Jingyi Peng
doaj   +1 more source

Beamforming Dual-loop Optimization Algorithm for RIS-assisted UAV Communication Systems [PDF]

Zhengzhou Daxue xuebao. Gongxue ban
In order to enhance the spectrum efficiency of the RIS-UAV relay communication system formed by integrating UAV and RIS in complex urban environments, research was conducted to explore the optimization of maximizing system downlink sum rate of RIS-UAV ...
GUO Xinying, LIU Longfei, ZHU Chunhua
doaj   +1 more source

Performance of a Double RIS Communication System Aided by Partially Active Elements

Sensors, 2023
Reconfigurable intelligent surface (RIS) has emerged as a promising technology to enhance the spectral efficiency of wireless communication systems. However, if there are many obstacles between the RIS and users, a single RIS may not provide sufficient ...
Seung-Geun Yoo, Min-A Kim, Jin-Woo Kim, Sang-Wook Park, Young-Hwan You, Hyoung-Kyu Song   +5 more
doaj   +1 more source

Inhibition of growth and urease activity of Helicobacter pylori by Korean edible seaweed extracts

Botan‪ical Sciences, 2013
Of 27 Korean seaweed species screened for potential anti- H. pylori activity, seven (25.9%) showed strong inhibitory activity based on the agar diffusion method. The strongest activity was observed for ethanol extracts from Ishige okamurae. At 1 mg/disk,
Bo-Bae Lee, Jae-Suk Choi, Hye Eun Moon, Yu-Mi Ha, Myung Sook Kim, Kwang Keun Cho, In Soon Choi   +6 more
doaj   +1 more source

A sleep-active neuron can promote survival while sleep behavior is disturbed.

PLoS Genetics, 2023
Sleep is controlled by neurons that induce behavioral quiescence and physiological restoration. It is not known, however, how sleep neurons link sleep behavior and survival.
Inka Busack, Henrik Bringmann
doaj   +1 more source

Clinical performance of the urine‐based TERT promoter AbsoluteQ Digital PCR for non‐invasive detection of bladder cancer

Molecular Oncology, EarlyView.
A urine‐based digital PCR assay targeting two hotspot TERT promoter variants detected bladder cancer with high sensitivity and no false positives in this case–control cohort. The streamlined AbsoluteQ workflow outperformed Sanger sequencing and supports non‐invasive molecular testing for bladder cancer detection.
Anna Nykel, Izabela Kubiak, Lena Rutkowska, Żaneta Kasprzyk, Łukasz Kępczyński, Michał Bednarek, Dariusz Sobieraj, Jacek Wilkosz, Piotr Kania, Adam Jędrzejczyk, Bogdan Kałużewski, Agnieszka Gach, Tadeusz Kałużewski   +12 more
wiley   +1 more source