Results 21 to 30 of about 373,425 (266)

Design of a compact K-band transceiver front-end module

open access: yesDianzi Jishu Yingyong, 2023
A compact and low-cost transceiver front-end module is designed for point-to-point radio communication system in this paper. The transceiver module contains one receive channel, one transmit channel, two groups of LO synthesizers in limited area.
Wang Yi
doaj   +1 more source

Techno-economic process optimization for a range of membrane performances: What provides real value for point-source carbon capture?

open access: yesCarbon Capture Science & Technology
Membranes provide a unique opportunity for heavy industry decarbonization and a real solution requires optimal system design. We use a superstructure process model to minimize capital and operational expenses for post-combustion carbon capture systems ...
Joshua C. Watson   +3 more
doaj   +1 more source

Performance Review of Multiple Reference Versus Time Domain Optical Coherence Tomography

open access: yesIEEE Photonics Journal, 2018
We present a detailed characterization of noise sources in multiple reference optical coherence tomography (MR-OCT) compared to time-domain OCT (TD-OCT).
Kai Neuhaus   +6 more
doaj   +1 more source

Simple and rapid hydrogenation of p-nitrophenol with aqueous formic acid in catalytic flow reactors

open access: yesBeilstein Journal of Organic Chemistry, 2013
The inner surface of a metallic tube (i.d. 0.5 mm) was coated with a palladium (Pd)-based thin metallic layer by flow electroless plating. Simultaneous plating of Pd and silver (Ag) from their electroless-plating solution produced a mixed distributed ...
Rahat Javaid   +3 more
doaj   +1 more source

High Gain and Wideband Fabry-Perot Resonator Antenna Based on a Compact Single PRS Layer

open access: yesIEEE Access, 2022
In this paper, a wideband and high gain Fabry Perot Resonator Antenna (FPRA) is proposed. It is based on a synthesized compact single partially reflective surface (PRS) layer acting as a superstrate to a slot-coupled feed antenna, which acts as a ...
Noureddine Melouki   +2 more
doaj   +1 more source

The layer by layer selective laser synthesis of ruby [PDF]

open access: yesScience of Sintering, 2010
In the work, features of the layer-by-layer selective laser synthesis (SLS) of ruby from an Al2O3-Cr2O3 mixture are considered depending on the irradiation power, the laser beam traverse speed, the height and amount of the backfill of powder layers.
Vlasova M.   +7 more
doaj   +1 more source

Roads Rehabilitation and Environment in Moldova: Some Legal and Normative Harmonization Aspects

open access: yesPresent Environment and Sustainable Development, 2014
This paper analyzes the environmental regulatory reforms of the Republic of Moldova to restore roads and problems over time. Goals and objectives are the analysis of the current situation on road rehabilitation and environmental assessments in this area,
Cocirta Petru, Vladicescu Viaceslav
doaj   +1 more source

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

open access: yesSensors, 2020
This article presents a compact, planar, quad-port ultra-wideband (UWB) multiple-input−multiple-output (MIMO) antenna with wide axial ratio bandwidth (ARBW).
Pawan Kumar   +2 more
doaj   +1 more source

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

open access: yesFEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai   +4 more
wiley   +1 more source

Dual-Flow Structure to Design a Continuous and Compact Nature Reserve

open access: yesIEEE Access, 2019
Establishing the conservation reserves is an efficient approach to protect various species, in which maintaining the spatial characteristics of the habit is an important issue.
Chih-Wei Lin, Wei-Hao Tu, Jin-Fu Liu
doaj   +1 more source

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