Physical DC Modes in the Microwave Resonator With Complex Geometric Topology

On preparation of bimetal nanoparticles by using a single-mode microwave resonator, Ag–Ni and Pd–Ag nanocomposites were synthesized under microwave irradiation at 80 centigrade, which was a lower temperature than that for reduction of Ag ion.

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Use of the Composite Properties of a Microwave Resonator to Enhance the Sensitivity of a Honey Moisture Sensor

Sensors ◽

10.3390/s21072549 ◽

2021 ◽

Vol 21 (7) ◽

pp. 2549

Author(s):

José R. Reyes-Ayona ◽

Eloisa Gallegos-Arellano ◽

Juan M. Sierra-Hernández

Keyword(s):

Dielectric Permittivity ◽

Frequency Response ◽

Microwave Resonator ◽

The Real ◽

Moisture Sensor ◽

Composite Resonator ◽

Composite Properties

A moisture sensor based on a composite resonator is used to measure different honey samples, which include imitation honey. The sensor changes its frequency response in accordance with the dielectric permittivity that it detects in the measured samples. Although reflectometry sensors have been used to measure the percentage of moisture in honey for almost a century, counterfeiters have achieved that their apocryphal product is capable of deceiving these kinds of sensors. Metamaterial features of the composite resonators are expected to improve their response when detecting lossy samples such as organic samples. It is also sought that these sensors manage to detect small differences not only in the real parts of the dielectric permitivities of samples but also in their imaginary parts, and, thus, the sensors are able to discern between real honey and slightly altered honey. Effectively, not only was it possible to improve the response of the sensors by using lossy samples but it was also possible to identify counterfeit honey.

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A novel design of microwave resonator

2005 Asia-Pacific Microwave Conference Proceedings ◽

10.1109/apmc.2005.1606547 ◽

2006 ◽

Author(s):

Tran Anh Tuan ◽

Phan Anh

Keyword(s):

Microwave Resonator ◽

Novel Design

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Cross-sections of unknotted ribbon disks and algebraic curves

Compositio Mathematica ◽

10.1112/s0010437x19007012 ◽

2019 ◽

Vol 155 (2) ◽

pp. 413-423

Author(s):

Kyle Hayden

Keyword(s):

Cross Sections ◽

Algebraic Curves ◽

American Mathematical Society ◽

Geometric Topology ◽

Mathematical Society ◽

Advanced Mathematics ◽

Low Dimensional Topology ◽

Low Dimensional ◽

Holomorphic Disks

We resolve parts (A) and (B) of Problem 1.100 from Kirby’s list [Problems in low-dimensional topology, in Geometric topology, AMS/IP Studies in Advanced Mathematics, vol. 2 (American Mathematical Society, Providence, RI, 1997), 35–473] by showing that many nontrivial links arise as cross-sections of unknotted holomorphic disks in the four-ball. The techniques can be used to produce unknotted ribbon surfaces with prescribed cross-sections, including unknotted Lagrangian disks with nontrivial cross-sections.

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