Gauge symmetries are known to be respected by gravity because gauge charges carry flux lines, but global charges do not carry flux lines Milestone Cards and are not conserved by gravitational interaction.For discrete symmetries, they are spontaneously broken in the Universe, forming domain walls.Since the realization of discrete symmetries in the U
Side Lobe Reduction in an X-Band Horn Antenna Loaded by a Wire Medium
Through electromagnetic simulation, the present work reports on a comparative study of the enhanced radiation properties of a standard X-band horn pedal plate antenna loaded by a wire medium.Acting as an artificial dielectric the wire medium consists of an array of parallel metallic wires installed into the antenna with the wires oriented in the di
Asymmetric cell division of hematopoietic stem cells: recent advances, emerging concepts, and future perspectives
Hematopoietic stem cells (HSCs) can self-renew and differentiate for the entire life of an organism to produce new blood cells when needed.This process is regulated by asymmetric cell division (ACD), an evolutionarily conserved mechanism whereby cell fate determinants are unequally segregated into the daughter cells during division to instruct diff
Is There a Place for Medicinal Cannabis in Treating Patients with Sleep Disorders? What We Know so Far
Kathleen J Maddison,1,2 Christopher Kosky,1 Jennifer H Walsh1,2 1West Australian Sleep Disorders Research Institute, Department of Pulmonary Physiology & Sleep Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia; 2Centre for Sleep Science, University of Western Australia, Perth, Western Australia, AustraliaCorrespondence: J
Application of Mass Spectrometry in New Energy Fields
The development and utilization of environment-friendly energy is imminent with global energy shortage and climate change becoming increasingly serious.The advancement and utilization of environment-friendly energy, including photocatalytic hydrogen production, electrocatalytic pollutant removal, and the development of electrochemical energy storag