Results 21 to 30 of about 964 (142)

Cascaded microsphere‐coupled surface‐enhanced Raman spectroscopy (CMS‐SERS) for ultrasensitive trace‐detection

open access: yesNanophotonics, Volume 11, Issue 3, Page 559-570, January 2022., 2022
Abstract Surface‐enhanced Raman spectroscopy (SERS) has been widely investigated and employed as a powerful optical analytical technique providing fingerprint vibrational information of molecules with high sensitivity and resolution. In addition to metallic nanostructure, dielectric micro‐/nano‐structures with extraordinary optical manipulation ...
Yanlin Mi   +5 more
wiley   +1 more source

3D Propulsions of Rod‐Shaped Micropropellers

open access: yesAdvanced Intelligent Systems, Volume 3, Issue 11, November 2021., 2021
An asymmetric structural design is proposed to construct rod‐shaped micropropellers that can realize surface‐free 3D propulsions. These 3D micropropellers have an in‐plane rotating “spinning” mode to gain high speed and an out‐of‐plane biconical rotating “precession” mode to pass through narrow channels with a smaller rotation radius, which makes them ...
Yuan Zhang   +6 more
wiley   +1 more source

Assessing the Influence of Temperature‐Memory Creation on the Degradation of Copolyesterurethanes in Ultrathin Films

open access: yesAdvanced Materials Interfaces, Volume 8, Issue 6, March 23, 2021., 2021
Ultrathin films at the air water interface are manipulated in a controlled way to represent the semicrystalline morphology of a temperature‐memory polymer at distinct points of the programming/switching cycle. The degradability under enzymatic catalysis depends on the deformation temperature, which is also reflected in the viscoelastic properties ...
Rainhard Machatschek   +2 more
wiley   +1 more source

The effects of PO43- removal from aqueous solution with varied concentrations of metal oxides in steel slag filter system [PDF]

open access: yes, 2018
High amount of orthophosphate will accelerate the growth of autotrophs and eutrophication will occur. This phenomenon decreases the water quality and as a result may increase the cost of water treatment for drinking water.
Ahmad, Siti Zu Nurain   +2 more
core   +1 more source

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

open access: yesInternational Journal of Antennas and Propagation, Volume 2021, Issue 1, 2021., 2021
The present study proposed the equivalent test method for the strong electromagnetic field radiation of electric explosive devices (EEDs) of the weapon equipment to satisfy the military requirements of the electromagnetic radiation safety test, as well as the evaluation of the electric ignition, the electric initiation ammunition, or missiles.
Biao Wang   +5 more
wiley   +1 more source

Antennas for the detection of radio emission pulses from cosmic-ray induced air showers at the Pierre Auger Observatory [PDF]

open access: yes, 2012
The Pierre Auger Observatory is exploring the potential of the radio detection technique to study extensive air showers induced by ultra-high energy cosmic rays. The Auger Engineering Radio Array (AERA) addresses both technological and scientific aspects
Pastor Carpi, Sergio   +1 more
core   +8 more sources

Theoretical Investigations on CPW-Fed Single and Dual-Polarized Slot Radiators Using Schelkunoff’s Biconical Antenna Analysis [PDF]

open access: yesRadioengineering, 2020
This article presents a closed-form analysis of CPW-fed slot dipole structures with the help of Schelkunoff’s biconical antenna analysis technique and Babinet’s principle. Input characteristics of CPW-fed slot dipole antennas are investigated, and closed-
A. Banerjee   +4 more
doaj  

Reduction of the model noise in non-linear reconstruction via an efficient calculation of the incident field: application to a 434 MHz Scanner [PDF]

open access: yes, 1999
Microwave tomography has been drastically boosted by the development of efficient reconstruction algorithms based on an iterative solution of the corresponding non-linear inverse problem.
Bolomey, Jean Charles   +7 more
core   +1 more source

Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter [PDF]

open access: yes, 2017
An in-situ calibration of a logarithmic periodic dipole antenna with a frequency coverage of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio ...
Aab, A.   +404 more
core   +9 more sources

Design of Compact Broadband Omni directional Canonical Sleeve Antenna covering 500-3600 MHz

open access: yesAdvanced Electromagnetics, 2018
A novel compact broadband Canonical Sleeve Antenna (CSA) covering 500-3600 MHz with omni directional characteristics is presented in this paper. A new method is employed in which the radiating antenna structure is designed as combination of three ...
C. S. Ram, D. Vakula, M. Chakravarthy
doaj   +1 more source

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