Hardness Tests

Easiness Assumptions and Hardness Tests : Trading Time for Zero

Easiness Assumptions and Hardness Tests: Trading Time for Zero Error

We propose a new approach towards derandomization in the uniform setting, where it is computationally hard to find possible mistakes in the simulation of a given probabilistic algorithm. The approach consists in combining both easiness and hardness complexity assumptions: if a derandomization method based on an easiness assumption fails, then we obtain a certain hardness test that can be used t...

Easiness Assumptions and Hardness Tests : Trading Time for Zero

We propose a new approach towards derandomization in the uniform setting, where it is computationally hard to nd possible mistakes in the simulation of a given probabilistic algorithm. The approach consists in combining both easiness and hardness complexity assumptions: if a derandomization method based on an easiness assumption fails, then we obtain a certain hardness test that can be used to ...

FPGA based image acquisition and graphic interface for hardness tests by indentation

We present a real-time video and image acquisition system, which has important characteristics such as modularity, configurability, versatility, and low cost. This system was developed on the Altera DE2 Board ® using Verilog HDL ® (Hardware Description Language), VHDL ® (VHSIC Hardware Description Language) and Block Diagram as coding languages. The proposed system architecture was applied for ...

Comparison of Rockwell B Hardness (hrb) Tests Using Steel and Tungsten Carbide Ball Indenters

Significant measurement differences occur in Rockwell B hardness (HRB) tests when using 1.588 mm diameter ball indenters made of steel and tungsten carbide (WC). In this paper, finite element analysis (FEA) is used to simulate the HRB indentation process using steel, tungsten carbide and rigid ball indenters on the same tested materials under the same testing conditions. The influence of the de...