Abstract Boundary conditions for a massless Dirac fermion in 2+1 dimensions where the space is a half-plane are discussed in detail.It is argued that linear boundary conditions that leave the Hamiltonian Hermitian generically break C P and T symmetries as well as Lorentz and conformal symmetry.We show that there is essentially one special case wher
With the increasing resolution of optical remote sensing images, ship detection in optical remote sensing images has attracted a lot of research interests.The current ship detection methods usually adopt the coarse-to-fine detection strategy, which firstly extracts low-level and manual features, and then performs multi-step training.Inadequacies of
Background: COVID-19 has affected the whole world.Apart from the impact of the COVID-19 outbreak on physical health, there has been a significant impact on the mental health of the individuals.To address these mental health concerns, our institute had started a 24/7 national telephonic helpline to enable distressed individuals to reach out and seek
Introduction.Single intraperitoneal injections of sublethal doses of cadmium (10 µg Cd·kg-1 body weight) and nickel (60 µg Cd·kg-1 body weight) were administered to carp, Cyprinus carpio L., to determine detoxification potential of the fish affected after transfer to a clean milieu, as reveale
This paper aims to develop a novel attitude determination system aided by polarization sensor.An improved heading angle function is derived using the perpendicular relationship between directions of E-vector of linearly polarized Oil Filter light and solar vector in the atmospheric polarization distribution model.The Extended Kalman filter (EKF) wi