A semiautomatic machine for grinding lightweight refractory parts

Refractories ◽  
1984 ◽  
Vol 25 (1-2) ◽  
pp. 50-53
Author(s):  
D. G. Vizhunov
Keyword(s):  
Semiautomatic Machine ◽  
Lightweight Refractory

Semiautomatic machine for hardening high-speed steel end mills

1985 ◽  
Vol 27 (2) ◽  
pp. 94-95
Author(s):  
N. M. Raznikov ◽  
A. I. Kopenkin
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Semiautomatic Machine ◽  
End Mills

Fettling porcelain flatware on a semiautomatic machine

1970 ◽  
Vol 27 (7) ◽  
pp. 434-434
Author(s):  
N. P. Belyi ◽  
N. F. Saul'
Keyword(s):  
Semiautomatic Machine

Production of lightweight refractory cordierite tiles

1983 ◽  
Vol 40 (1) ◽  
pp. 38-39
Author(s):  
V. N. Mokhort ◽  
V. P. Mineev ◽  
L. K. Kul'mamirov ◽  
V. V. Arbuzin ◽  
L. I. Kul'mamirova
Keyword(s):  
Lightweight Refractory

Minority Migrations and the Diffusion of Technology

1951 ◽  
Vol 11 (4) ◽  
pp. 347-360 ◽  
Author(s):  
Warren C. Scoville
Keyword(s):  
Production Function ◽  
Model Building ◽  
Semiautomatic Machine ◽  
New Production ◽  
Foreign Markets ◽  
Diffusion Of Technology ◽  
Building Activities ◽  
Innovation And Diffusion ◽  
First Time ◽  
And Diffusion

The process of technical change from the economist's viewpoint may be broken down into three phases: invention, innovation, and diffusion. Invention, or the increase in technological possibilities, is the discovery or perception of new configurations of technical processes or principles that alter the array of possible production functions. An innovation consists of using any given production function for the “first” time. Diffusion is basically imitative and involves the gradual replacement of old methods by the new. One example will suffice to illustrate these distinctions. The invention of the automatic bottle machine consisted of the conception, experimentation, and model-building activities of Michael J. Owens; the pioneering efforts of the entrepreneurs at Toledo, Ohio, to demonstrate that the new production function was both practical and economically feasible constituted the innovational phase; and the gradual replacement of hand-blown and semiautomatic machine methods by the new process in both American and foreign markets involved diffusion.

Toward a Semiautomatic Machine Learning Retrieval of Biophysical Parameters

2014 ◽  
Vol 7 (4) ◽  
pp. 1249-1259 ◽  
Author(s):  
Juan Pablo Rivera Caicedo ◽  
Jochem Verrelst ◽  
Jordi Munoz-Mari ◽  
Jose Moreno ◽  
Gustavo Camps-Valls
Keyword(s):  
Machine Learning ◽  
Semiautomatic Machine ◽  
Biophysical Parameters

scholarly journals Strength of the flexural joint of mortar joints and solid fired clay brick prisms

2021 ◽  
Vol 2139 (1) ◽  
pp. 012017
Author(s):  
N Afanador García ◽  
G Guerrero Gómez ◽  
C Nolasco Serna
Keyword(s):  
Compressive Strength ◽  
Standard Deviation ◽  
Flexural Strength ◽  
Coefficient Of Variation ◽  
Force Measurement ◽  
Research Work ◽  
Simple Random Sampling ◽  
Design Parameters ◽  
Semiautomatic Machine ◽  
Clay Brick

Abstract Masonry constructions built with mortar and solid fired clay bricks are subject to: high cement content, excessive water-cement ratio causing problems of mortar shrinkage during curing and differential movements between the brick and mortar caused by movements due to wind or seismic events. Earth movements generate some failures in simple masonry walls and confined masonry in solid brick joints, mainly with failure inclination angles varying from 45 degrees to 50 degrees. The objective of this research work was to estimate the flexural bond strength of the mortar joint and the solid fired clay brick and thus establish design parameters for non-structural masonry in the municipality of Ocanña, Colombia. From the fired clay brick manufacturers, 18 in total, simple random sampling was used to determine the sample size, 4 manufacturers were randomly selected. In addition, the characterization of the solid fired clay brick units was carried out with respect to their compressive strength, initial absorption rate and final absorption, as well as the mortar with respect to its compressive strength at 28 days, according to the Colombian standard for earthquake resistant constructions; for the determination of the flexural strength of the bonding mortar and solid brick units, a semiautomatic machine for flexural strength testing of masonry units, Pinzuar model PC-13, with a force measurement of 1000 N and an accuracy of 0.1 N, was designed. The flexural strength at the masonry joint was obtained for mortar type M with a value of 0.26 MPa, with a standard deviation of 0.01 MPa and a coefficient of variation of 4.72%. As for mortars type N and S, the average strength value was equal to 0.24 MPa for the two types of mortar, with standard deviation of 0.03 MPa and 0.01 MPa respectively, and coefficient of variation of 11.4% and 3.18% respectively. Given the importance of the variables, an interpretation of physical of the relationship between the properties was made: compressive strength of the solid fired clay brick and flexural strength at the masonry joint, since their average values were similar.

Optimizing the multilayer heat-insulating lightweight refractory linings of industrial furnaces and heat-powered units

2005 ◽  
Vol 46 (6) ◽  
pp. 432-434
Author(s):  
V. M. Zubashchenko ◽  
I. N. Kuzin
Keyword(s):  
Lightweight Refractory

A semiautomatic machine for applying deep cuts

1983 ◽  
Vol 40 (2) ◽  
pp. 63-66
Author(s):  
S. L. Shvartsman
Keyword(s):  
Semiautomatic Machine ◽  
Deep Cuts

Preparation of Lightweight Mullite-Anorthite Refractories by Different Routes

2018 ◽  
Vol 281 ◽  
pp. 150-155
Author(s):  
Dan Yang Zhang ◽  
Ling Qu ◽  
Wen Jie Yuan
Keyword(s):  
Thermal Conductivity ◽  
Phase Composition ◽  
Bulk Density ◽  
Apparent Porosity ◽  
Template Method ◽  
Lightweight Refractory ◽  
Sacrificial Template ◽  
Polyurethane Sponge ◽  
Main Component ◽  
Aluminate Cement

Mullite-anorthite as a kind of lightweight refractory combines the low thermal conductivity of anorthite and the excellent thermal properties of mullite. In this work, mullite beads and calcium aluminate cement was used as the main component and bonding agent. The lightweight mullite-anorthite refractory was prepared by difference routes including foaming method, addition of pore-forming agent and sacrificial template method. The phase composition, bulk density, apparent porosity and thermal conductivity of samples were compared. The results showed that anorthite formed as the consequence of the reaction of cement and mullite. Extra addition of foam, cornstarch and polyurethane sponge could decrease the bulk density of samples. The pore size of samples prepared by foaming method was the smallest. The apparent porosity of samples obtained by sacrificial template method was largest, but the thermal conductivity was the highest due to the open pores.

Semiautomatic machine tool for sharpening diamond planes

2008 ◽  
Vol 28 (5) ◽  
pp. 498-499
Author(s):  
Ya. I. Barats ◽  
D. A. Tikhonov ◽  
A. G. Dvoinev
Keyword(s):  
Machine Tool ◽  
Semiautomatic Machine
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