Epistemologies for Technology and its Teaching: Untying the Knot of a Three-level Technological Problem

2019 ◽  
Author(s):  
Panagiotis S. Makrygiannis ◽  
Dimitrios Piromalis ◽  
Michail Papoutsidakis ◽  
Dimitrios Tseles ◽  
Evangelos C. Papakitsos
Keyword(s):  
Technological Problem

scholarly journals RESEARCH OF VIBRATION MACHINES DYNAMICS FOR PRODUCT SURFACES PROCESSING BY MATHEMATICAL MODELING

2020 ◽  
pp. 35-43
Author(s):  
Volodymyr Topilnytskyy ◽  
Yaroslav Kusyi ◽  
Dariya Rebot
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Surface Treatment ◽  
Lagrange Equation ◽  
The Body ◽  
Technological Problem ◽  
Surface Processing ◽  
Approximate Methods ◽  
Vibration Machine ◽  
Working Chamber

The article describes the methodology for the study of the dynamics of vibrating machines for surface processing of products by mathematical modeling, which is presented in four main stages. The first stage: analysis of classes of vibrating machines for surface treatment of products, choice of basic for solving the technological problem, project of a unified calculation scheme of the machine. The second stage: development of a nonlinear mathematical model for describing the dynamics of the vibration machine working body and its filling, development of elements of automated calculations of the machine. The third stage: the study of the influence of the parameters of the vibrating machine, product sets and tools (with their various combinations) on the factors of the intensity of products surface processing. The fourth stage: recommendations for choosing vibrating machine parameters and machining bodies that will maximize the processing performance of products with the selected intensity criterion. A mathematical model for describing the motion of a vibrating machine for surface treatment of articles by a set of unrelated bodies of small size is created. It has two unbalance units that generate oscillations of its working body and a spring suspension-mounting of the working chamber (container). The model is parametric and nonlinear, incorporating key dynamic, kinematic and geometric parameters of the vibrating machine in symbolic format. It is constructed by: descriptions of the plane-parallel movement of the mechanical system, the rotational motion of the material point and the body; second-order Lagrange equation; asymptotic (approximate) methods of nonlinear mechanics. With the help of the model it is possible: to describe the oscillatory movement of the working chamber (container) of the vibrating machine; to study the influence of the machine parameters on the efficiency of performance of the set technological task, the conditions of occurrence of non-stationary modes of operation of the vibrating machine and the ways of their regulation.

Visualization of Human Behavior Data

Big Data ◽  
2016 ◽  
pp. 1582-1612 ◽  
Author(s):  
Alessandro Marcengo ◽  
Amon Rapp
Keyword(s):  
Data Visualization ◽  
Fundamental Problem ◽  
Technological Problem ◽  
Quantified Self ◽  
Application Domain ◽  
Theoretical Terms ◽  
Future Directions ◽  
New Approach ◽  
Robust Approach ◽  
Human Side

Although in recent years the Quantified Self (QS) application domain is growing, there are still some palpable fundamental problems that relegate the QS movement in a phase of low maturity. The first is a technological problem, and specifically, a lack of maturity in technologies for the collection, processing, and data visualization. This is accompanied by a perhaps more fundamental problem of deficit, bias, and lack of integration of aspects concerning the human side of the QS idea. The step that the authors tried to make in this chapter is to highlight aspects that could lead to a more robust approach in QS area. This was done, primarily, through a new approach in data visualization and, secondly, through a necessary management of complexity, both in technological terms and, for what concerns the human side of the whole issue, in theoretical terms. The authors have gone a little further stressing how the future directions of research could lead to significant impacts on both individual and social level.

Ensuring Food Security as a Legal and Technological Problem

2021 ◽  
pp. 337-352
Author(s):  
Aleksey P. Anisimov ◽  
Denis E. Matytsin
Keyword(s):  
Food Security ◽  
Technological Problem

Forward planning: meeting the requirements. The world food and agricultural situation

1973 ◽  
Vol 267 (882) ◽  
pp. 5-12 ◽  
Keyword(s):  
Developing Countries ◽  
Developed Countries ◽  
Technological Problem ◽  
Trade Policies ◽  
World Food ◽  
Planning Meeting ◽  
The World ◽  
The 1960S ◽  
The Developed Countries ◽  
Obvious Feature

The world food and agricultural situation in the 1980s must be looked at, as now, in terms of the division between developed and developing countries. While there will still be problems in the developed countries - such as surpluses - the great crisis will remain in the developing countries. The most obvious feature of the crisis is the balance between the increase in population and the increase in food production. In the 1960s, the balance was extremely precarious and, in the first two years of the 1970s, population actually grew faster than production. Hence, it is imperative to accelerate the increase in production in the developing countries. In order to achieve this, it is important to see to what extent the obstacles are due to lack of knowledge on how to obtain more from natural resources - primarily a technological problem - and to what extent they are due to the weaknesses of human institutions and of the political will for change. In addition, the prospects for a more rational and hopeful world food and agricultural situation in the 1980s will depend very largely on how the national agricultural production and trade policies of both developed and developing countries can be modified by practical steps towards international agricultural adjustment for the benefit of all.

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