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Common Envelope Jet Supernova r -process Yields Can Reproduce [Eu/Fe] Abundance Evolution in the Galaxy
(2022-02-16)
We use a numerical Galactic chemical evolution model and find that the common envelope jet supernova (CEJSN) r-process scenario can account for both the very early average ratio of europium to iron and its evolution at ...
Experimental investigation on environmental control of a 50-person mine refuge chamber
(2022-02-15)
Air quality and thermal environment of mine refuge chamber (MRC) are very important to determine the physical safety of refugees. Accurately assessing the environmental load and taking reasonable measures are critical to ...
The BPT Diagram in Cosmological Galaxy Formation Simulations: Understanding the Physics Driving Offsets at High Redshift
(2022-02-15)
The Baldwin, Philips, & Terlevich diagram of [O iii]/Hβ versus [N ii]/Hα (hereafter N2-BPT) has long been used as a tool for classifying galaxies based on the dominant source of ionizing radiation. Recent observations have ...
Fault Detection and Isolation in Electric Vehicle Powertrain
(Wiley, 2022-02-15)
The powertrain of an electric vehicle (EV) consists mainly of the battery, electric motor and power electronics. The safe and reliable operation of the electric vehicle depends on their fault-free operation. Fault detection ...
Edge Security for SIP-enabled IoT Devices with P4
(2022-02-11)
The exponential growth of IoT devices poses security concerns, in part because they provide a fertile breeding ground for botnets. For example, the Mirai botnet infected almost 65,000 devices in its first 20 hours. With ...
Chandra view of Abell 407: The central compact group of galaxies and the interaction between the radio AGN and the ICM
(2022-02-11)
Abell 407 (A407) is a unique galaxy cluster hosting a central compact group of nine galaxies (named as 'Zwicky's Nonet'; G1 - G9 in this work) within a 30 kpc radius region. The cluster core also hosts a luminous radio ...
Proof of Concept of a Low-Cost Beam-Steering Hybrid Reflectarray that Mixes Microstrip and Lens Elements Using Passive Demonstrators
(2022-02-11)
In this article, a proof-of-concept study on the use of a hybrid design technique to reduce the number of phase shifters of a beam-scanning reflectarray (RA) is presented. An extended hemispherical lens antenna with feeds ...
Genetic algorithm optimized robust nonlinear observer for a wind turbine system based on permanent magnet synchronous generator
(2022-02-10)
This paper presents an optimal control scheme for a Permanent Magnet Synchronous Generator (PMSG) coupled to a wind turbine operating without a position sensor. This sensorless scheme includes two observers: The first ...
Robust Multi-Beam Multiplexing Design Based on a Hybrid Beamforming Structure with Nearly Equal Magnitude Analogue Coefficients
(2022-02-10)
One novel design considering two practical application constraints based on the interleaved subarray architecture is proposed to achieve multi-beam multiplexing for arbitrary directions to serve corresponding users. One ...
Performance analysis of acceleration effect on paraffin melting in finned copper foam
(2022-02-05)
Phase change material (PCM) has great potential in thermal control of aircraft electronic components because of their excellent latent heat capacity. In the current work, a finned copper foam phase change energy storage ...