scholarly journals Application of a logarithmic model on a stress - deformation interdependence of the recycled tires

2019 ◽  
Vol 13 (3) ◽  
pp. 180-183
Author(s):  
Anđelko Crnoja ◽  
Željko Kos ◽  
Oleg Popov
Keyword(s):  
Stress Resistance ◽  
Raw Materials ◽  
Technological Development ◽  
Tensile Force ◽  
High Accuracy ◽  
Specific Mass ◽  
Logarithmic Model ◽  
Independent Variables ◽  
Stress Deformation ◽  
Very High

During the last two decades, technological development has led to an extreme increase in transport and connected industries. This has significantly increased the production of automobile tires, which have their life span after which they go to waste. It is therefore necessary to extricate new products from recycled raw materials. For a product to be created, it is necessary, especially in civil engineering, to examine and determine all the properties of this material (pressure, traction, stress resistance, etc.). The results obtained by the research in this paper are mathematically processed by applying a logarithmic model. The aim of this process is to predict stress deformation in terms of tensile force. The model obtained is significant with accuracy of 87.21% and has a very high accuracy of the deformation estimation in relation to the applied stress. Independent variables were granulometric composition, binder (glue) and specific mass.

scholarly journals COMPARATIVE ANALYSIS OF MODERN ELECTRONIC GEODESIC DEVICES

2021 ◽  
Vol 4 (164) ◽  
pp. 117-121
Author(s):  
M. Kukhar ◽  
O. Dobrokhodova ◽  
A. Evdokіmov ◽  
M. Myronenko
Keyword(s):  
Comparative Analysis ◽  
Technological Development ◽  
High Accuracy ◽  
Geospatial Data ◽  
Terrain Models ◽  
Accuracy Of Measurements ◽  
Gnss Receivers ◽  
Technical Features ◽  
Very High

Modern geodetic equipment is developing very rapidly. There is a growing need for modern surveying instruments with modern electronics. These devices differ not only in model number, but also in fundamentally new technological solutions. The latest software is used in the devices themselves and in the processing of geospatial data. It provides more opportunities to automate the process of creating terrain models and the implementation of non-standard geodetic tasks. Therefore, now characteristic of the development of modern geodetic equipment is not to increase the accuracy of measurements, but to optimize the workflow using these devices. This is achieved through the development of hardware and software of these devices. This work is devoted to the comparative analysis of modern electronic geodetic instruments on the basis of specific instruments: total stations and GNSS receivers. The study uses methods: observation - to get acquainted with modern surveying equipment, comparison - to determine the technical features of modern electronic surveying instruments, analysis - to identify trends in modern electronic surveying instruments, sampling - to select instruments that will characterize their categories. A comparative analysis of modern geodetic instruments on the example of total stations Leica TS09 plus 1 "R500, Leica Nova MS60 1" and GNSS receivers GNSS Leica GS08Plus, Leica GS18 I was carried out to determine trends in modern electronic geodetic instruments. Thus, from this analysis follows a certain pattern. It is that there is no race for the accuracy of instruments - modern instruments have a very high accuracy. There is also a new trend in the technological development of geodetic instruments in the direction of increasing functionality and automation.

ANALYSIS FOR POTENCY AND PRODUCTION OF GRANULE ORGANIC FERTILIZER BASED ON MANURE

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Firman L. Sahwan
Keyword(s):  
Organic Material ◽  
Organic Materials ◽  
Raw Materials ◽  
Organic Fertilizer ◽  
Raw Material ◽  
Cow Manure ◽  
Production Potential ◽  
Natural Organic Material ◽  
Very High

Organic materials that are generally used as raw material for organic fertilizer granules (POG) is a natural organic material that has been degrade, smooth and dry. One of the main raw materials are always used with a very high percentage of usage, is manure. Manure potential in Indonesia is very high, amounting to 113.6 million tons per year, or 64.7 million tons per year to the island of Java. From this amount, it will be generated numbers POG production potential of 17.5 million tons per year (total Indonesia) or 9.9 million tons per year for the island of Java. While the realistic POG production predictions figures made from raw manure is 2.5 million tons annually, a figure that has been unable to meet the number requirement of POG greater than 4 million tons per year. Therefore, in producing POG, it should be to maximize the using of the potential of other organic materials so that the use of manure can be saved. With the use of a small amount of manure (maximum 30% for cow manure), it would be useful also to avoid the production of POG with high Fe content.keywods: organic material, manure, granule organic fertilizer

scholarly journals Stellar magnetic imaging from spectropolarimetric data

1996 ◽  
Vol 176 ◽  
pp. 53-60 ◽  
Author(s):  
J.-F. Donati
Keyword(s):  
Small Amplitude ◽  
High Accuracy ◽  
Spectral Lines ◽  
New Method ◽  
Doppler Imaging ◽  
Magnetic Imaging ◽  
Active Stars ◽  
Surface Fields ◽  
Very High

In this paper, I will review the capabilities of magnetic imaging (also called Zeeman-Doppler imaging) to reconstruct spot distributions of surface fields from sets of rotationnally modulated Zeeman signatures in circularly polarised spectral lines. I will then outline a new method to measure small amplitude magnetic signals (typically 0.1% for cool active stars) with very high accuracy. Finally, I will present and comment new magnetic images reconstructed from data collected in 1993 December at the Anglo-Australian Telescope (AAT).

Hole Accuracy during Deep Hole Drilling for Hydraulic Cylinder Application

2014 ◽  
Vol 984-985 ◽  
pp. 67-72 ◽  
Author(s):  
R. Clifford Benjamin Raj ◽  
B. Anand Ronald ◽  
A. Velayudham ◽  
Prasmit Kumar Nayak
Keyword(s):  
Feed Rate ◽  
Drill Hole ◽  
Hydraulic Cylinder ◽  
High Accuracy ◽  
Diameter Ratio ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Very High ◽  
Continuous Chip

Deep-hole drilling is a process in which the hole length will be very high when compared to diameter of the drill hole (i.e. length to diameter ratio will be greater than 5). Drilling a deep hole with very high accuracy is difficult process. The current project is about the production of deep hole with the aim to produce a chip which is not a continuous chip and also not a powdery chip. These conditions can be attained by varying the spindle speed and the tool feed rate.

Cost Effective Swath Bathymetry

2001 ◽  
Vol 35 (4) ◽  
pp. 33-45 ◽  
Author(s):  
Peter Hogarth
Keyword(s):  
Processing Time ◽  
Cost Effective ◽  
High Accuracy ◽  
High Coverage ◽  
Swath Bathymetry ◽  
World Survey ◽  
Set Up ◽  
Very High ◽  
Harbor Area ◽  
Wide Swath

Between 23rd and 25th July 2001 GeoSwath, a high specification shallow water wide swath bathymetry system, was used to survey the entire Portsmouth NH Harbor area. This paper deals with the results of this survey, illustrating the potential for significant reductions in the high costs, which have prevented widespread proliferation of Swath Bathymetry systems to date. Data, including a complete DTM gridded to 1 m resolution, will be presented and discussed in detail. These results show that the system is very easy to set up and use, requires greatly reduced boat and processing time, whilst offering high accuracy and very high coverage and resolution when used in a real-world survey of a dynamic harbor environment.

Investigation on Shear Behaviour of Flax-Kenaf Hybrid Composite

2014 ◽  
Vol 1051 ◽  
pp. 139-142 ◽  
Author(s):  
V.S. Srinivasan ◽  
S. Rajendra Boopathy ◽  
B. Vijaya Ramnath
Keyword(s):  
Hybrid Composite ◽  
Raw Materials ◽  
Technological Development ◽  
Fiber Composites ◽  
Shear Behaviour ◽  
Biodegradable Material ◽  
New Materials ◽  
Double Shear ◽  
Environmental Friendly ◽  
Shear Property

The present technological development makes us to find and fabricate new materials to replace existing materials. Also, the need for environmental friendly, easily biodegradable material plays prime role in determining the raw materials. In this paper Flax and Kenaf fibres are used as the suspending matrix to form hybrid composite with epoxy resin. Hand layup technique is carried out in this work to fabricate composite laminate. The double shear property is evaluated. The result shows that the hybrid composite shows better property than mono fiber composites.

M1212 Celiac Disease Serology with Very High Accuracy May Obviate Diagnostic Intestinal Biopsy in Different Clinical Scenarios

2008 ◽  
Vol 134 (4) ◽  
pp. A-362
Author(s):  
Emilia Sugai ◽  
María Laura Moreno ◽  
Hui Jer Hwang ◽  
Adriana Crivelli ◽  
Fabio Nachman ◽  
...  
Keyword(s):  
Celiac Disease ◽  
High Accuracy ◽  
Intestinal Biopsy ◽  
Clinical Scenarios ◽  
Very High

A high accuracy linear rate meter

1975 ◽  
Vol 39 (2) ◽  
pp. 327-330
Author(s):  
C. R. Wyss
Keyword(s):  
Circuit Design ◽  
Digital Circuits ◽  
Analog Computer ◽  
High Accuracy ◽  
Digital Display ◽  
Instantaneous Rate ◽  
Linear Rate ◽  
Very High ◽  
Design Techniques

By implementing analog computer techniques using digital circuits, an instantaneous rate meter was built with approximately 100 times the accuracy of commercially available rate meters. The circuit is accurate to within +/- 0.2 events/min over a range of rates of 0.2–900 epm. Modifications can be made to provide a digital display of rate. The circuit design techniques used in developing the rate meter may be used to generate a wide variety of functions of time with very high accuracy.

Discrete differential operators for periodic and two-periodic time functions

2019 ◽  
Vol 38 (1) ◽  
pp. 325-347 ◽  
Author(s):  
Tadeusz Sobczyk ◽  
Michał Radzik ◽  
Natalia Radwan-Pragłowska
Keyword(s):  
Differential Operators ◽  
High Accuracy ◽  
Large Set ◽  
Periodic Functions ◽  
Content Type ◽  
Second Derivatives ◽  
Non Linear ◽  
Discrete Operators ◽  
Linear Differential ◽  
Very High

Purpose To identify the properties of novel discrete differential operators of the first- and the second-order for periodic and two-periodic time functions. Design/methodology/approach The development of relations between the values of first and second derivatives of periodic and two-periodic functions, as well as the values of the functions themselves for a set of time instants. Numerical tests of discrete operators for selected periodic and two-periodic functions. Findings Novel discrete differential operators for periodic and two-periodic time functions determining their first and the second derivatives at very high accuracy basing on relatively low number of points per highest harmonic. Research limitations/implications Reduce the complexity of creation difference equations for ordinary non-linear differential equations used to find periodic or two-periodic solutions, when they exist. Practical implications Application to steady-state analysis of non-linear dynamic systems for solutions predicted as periodic or two-periodic in time. Originality/value Identify novel discrete differential operators for periodic and two-periodic time functions engaging a large set of time instants that determine the first and second derivatives with very high accuracy.

scholarly journals МЕТОДЫ СТАБИЛЬНЫХ ИЗОТОПОВ В ИССЛЕДОВАНИЯХ АРХЕОЛОГИЧЕСКИХ ОБЪЕКТОВ

2020 ◽  
Author(s):  
S. Rishko ◽  
◽  
G. Zaitseva ◽  
N. Burova ◽  
A. Sementsov ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Natural Environment ◽  
Raw Materials ◽  
High Accuracy ◽  
Trade Routes ◽  
Instrumental Technique ◽  
Technological Methods

Currently, many of the key archeology issues, including the questions of origin, relationships, migration and trade routes, sources of raw materials, technological methods in the processing of metals, etc., are difficult to solve by ar- cheology means alone. Progress in the field of instrumental technique regarding the advent of the latest-generation devices allows not only to perform elemental analysis of samples but also to measure with high accuracy different isotopes, which are often certain markers that characterize some components of the natural environment, provinces of habitation, diet and other important aspects of the ancient people’s habitat.

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