one of the most common methods for production of ultra fine grained materials is severe plastic deformation (spd). in this study, constrained groove pressing (cgp) and high pressure torsion (hpt) processes as effective methods of severe plastic deformation for the strain imposed on the pure copper were used. this paper presents the results of an experimental research, to review the influence of...

Axone (Akhuni), a homemade Nagamese fermented soybean product, is known for its umami flavor and taste and eaten as a delicacy in North Eastern India. Incorporation of Axone (1% w/w) in commercial poultry feed significantly improved growth rate (weight gain) both in piglets (p, 0.01) and grower pigs (p, 0.039). However, in grower pigs, growth rate was hampered in first week of experiment (p, 0....

Despite having some useful properties, stainless steels suffer from lack of suitable surface hardness. In this research electroless Ni-B-Tl coating was used with the aim to increase their surface hardness. The effects of Nickel chloride, Sodium borohydride, Thallium nitrate and Ethylendiamin on the chemical composition of coating were studied. To achieve an increase in hardness, the effects of ...

Genetic algorithm (GA) researchers have long desired to describe the key characteristics of GA-hardness. Unfortunately this goal has remained largely unmet. In this paper, we describe a new way for evaluating GA-hardness that is based on the foundations of formal complexity theory. In particular, a GA-reduction is introduced. Using this reduction, we show that a reasonable definition of "GA-har...

an experiment was conducted to study the effect of sulfuric acid, temperature scales and the source of seed on to break hardness alfalfa seed (medicagoscutellatacvrobinson). this study was carried out as a factorial experiment based on randomized complete design with four replications at the agricultural collage of lorestan university in 2005. acid treatment as the first factor (to rinse with a...

We explore the clearing problem in the barter exchange market. The problem, described in the terminology of graph theory, is to find a set of vertexdisjoint, length-restricted cycles that maximize the total weight in a weighted digraph. The problem has previously been shown to be NP-HARD. We advance the understanding of this problem by the following contributions. We prove three constant inappr...

Objectives: (1) To understand what hardness is, and how it can be used to determine material properties. (2) To conduct typical engineering hardness tests and be able to recognize commonly used hardness scales and numbers. (3) To be able to understand the correlation between hardness numbers and the properties of materials (4) To learn the advantages and limitations of the common hardness test ...