Hard X-ray spectral indices in solar flares as probes of the variations of magnetic field topology during a solar cycle.

Hard X-ray spectrum of GRS 1915+105: the disk-jet connection

Hard X-ray transient source observed during the 1976 transatlantic flight

Hard X-rays from accretion disk boundary layers

Hard-wired digital data preprocessing applied within a modular star and target tracker

Hardness Amplification in Proof Complexity

Hardness and Algorithms for Rainbow Connectivity

Hardness and Approximation of The Asynchronous Border Minimization Problem

Hardness and Parameterized Algorithms on Rainbow Connectivity problem

Hardness as randomness: a survey of universal derandomization

Hardness of Amorphous Hard Carbon Films Determined by the Ultra Low Load Microindentation Technique

Hardness of approximating the weight enumerator of a binary linear code

Hardness of approximation for crossing number

Hardness of conjugacy and factorization of multidimensional subshifts of finite type

Hardness of discrepancy computation and epsilon-net verification in high dimension

Hardness of Mastermind

Hardness Results for Agnostically Learning Low-Degree Polynomial Threshold Functions

Hardness Results for Approximate Pure Horn CNF Formulae Minimization

Hardness Results for the Gapped Consecutive-Ones Property

Hardness Variability of Linear Bipolar Devices