- TITLE:
LEADING APPROACHES FOR THE IMPLEMENTATION OF SYNERGIC ECONOMIC EFFICIENCY FOR ENTERPRISE INNOVATION AND DEVELOPMENT STRATEGY
- AUTHOR(S):
A.V.Cherep, A.G.Cherep, L.G.Oleinikova
- ABSTRACT:
This paper develops a methodological approach for assessing leading synergetic effects from
using the strategy of the economic innovation mechanism development (SEIMD) at enterprises. This
approach is based on the formation of emergence between the parameters, components, elements of
the development strategy, levers, tools, subsystems of the innovation mechanism, support units and
components of innovation activity systems given the action of the market environment factors in
order to increase the expected effect to large volumes. The approach is grounded on the use of
system and phased approaches and aims at providing financial, economic, innovation and
investment, technological, production and marketing effects caused by use of a certain type of
development strategy.
We postulate that the usage of this methodological approach would allow achieving a cumulative
effect of synergy, improving the enterprise’s position, stabilizing its development, organizing
production and economic, financial activities in the medium and long term. It was established that
the advantage of the synergetic effect assessment based on the use of SEIMD lies in the possibility to
strengthen synergetic relations between the components of the development strategy; achieve certain
types of effects based on the enterprise’s performance; calculate the total synergetic effect; take into
account the effects of external and internal factors that affect the development strategy; determine
the dynamism of the economic mechanism and innovation activity, that is, variability of their
constituent elements in the course of time; shape the methods to counter the threats of the market
environment. The proposed methodological approach means that it is possible to determine the
SEIMD efficiency, level of its stability, expected types of synergetic effects given the changes in the
market factors’ affect in order to provide the stability of the enterprise’s development. In addition,
the assessment of the synergetic effect is aimed at determining the efficiency of the selected SEIMD,
which is implemented at the enterprise, feasibility of its use, role in the activities and development of
the industrial enterprise as well as at calculating the effects of its implementation.
- DOWNLOAD:
LEADING APPROACHES FOR THE IMPLEMENTATION OF SYNERGIC ECONOMIC EFFICIENCY FOR ENTERPRISE INNOVATION AND DEVELOPMENT STRATEGY
- TITLE:
RESEARCH OF METHODS FOR INCREASING THE EFFICIENCY OF PRODUCING OXYGEN-HYDROGEN MIXTURE
- AUTHOR(S):
O. Luhovskyi, I. Nochnichenko, D. Kostiuk, A. Zilinskyi
- ABSTRACT:
In the study methods of increase of an overall performance of an electrolyzer for hydrogen-
oxygen mix obtaining are considered and their influence on system efficiency are investigated. Based
on the results of the analysis of existing studies of hydrogen generators, it was established their low
efficiency and the original design of the hydrogen generator was proposed. Experimental setup to
test the efficiency of the device and determine its performance was designed. There were carried
calculations of increasing the efficiency of a gas generation with the presence of an ultrasonic field.
Analysis of the experimental and theoretical results of the study made it possible to determine the
rational frequency and amplitude of the ultrasonic field. The results of the experimental data
confirmed the increase in the efficiency of the device for gas producing. Directions for improving the
performance of the cell by applying an ultrasonic field and pulse width modulation for maintaining
rational operating modes have been determined, as a result of which it is possible to increase the
productivity of the hydrogen-oxygen mixture up to 40%.
- DOWNLOAD:
RESEARCH OF METHODS FOR INCREASING THE EFFICIENCY OF PRODUCING OXYGEN-HYDROGEN MIXTURE
- TITLE:
EXPERIMENTAL STUDY OF THE ROUGHNESS OF LOW CARBON, MEDIUM CARBON AND TOOL STEEL AFTER DIAMOND BURNISHING
- AUTHOR(S):
V. Dunchev, A. Anchev
- ABSTRACT:
In this article the slide burnishing process of cylindrical specimens made of three types of
constructional steels (S235 low carbon steel, 45 medium carbon steel and Y8A tool steel) has been
studied. The object of this study is the process parameters influence on the roughness obtained. The
basic parameters (burnishing force, diamond’s tip radius, feed rate and number of passes) have been
studied through experimental approach. For that purpose three stages methodology has been
developed. Аs a result of the first stage, the five best combinations for the burnishing force and the
diamond’s tip radius under constant velocity and feed rate conditions have been determined. On this
basis, in the second stage the feed rate impact has been examined. After the second stage end, the
optimal basic parameters of the diamond burnishing process providing minimum roughness have
been determined. The impact of number of passes has been studied in the third stage. The number of
passes varies between one and eight passes for two kind of schemes – one-way and two-way
scheme.Under one-way diamond burnishing scheme the minimum roughness m109.0Ra
has
been obtained for the tool steel. For the three steels studied, the improvement in roughness is greater
for the one-way working scheme. The two-way scheme is not recommended for S235 steel because
the roughness obtained is minimal after one pass. In the conditions of two-way working scheme for
45 medium carbon steel the roughness decreases to six passes, then increases. However, this
reduction is 19%, while in a one-way scheme it reaches 31%. As with other burnishing processes, the
experimental results confirm that the factors of greatest importance for the roughness obtained are
the burnishing force and the diamond’s tip radius.
- DOWNLOAD:
EXPERIMENTAL STUDY OF THE ROUGHNESS OF LOW CARBON, MEDIUM CARBON AND TOOL STEEL AFTER DIAMOND BURNISHING
- TITLE:
EFFECT OF ION NITRIDING ON FATIGUE BEHAVIOR OF STEEL 35HGS
- AUTHOR(S):
V. Dunchev, J. Capek, M. Atanasov
- ABSTRACT:
In this article the fatigue behavior of specimens made of 35HGS low-alloyed steel has been
investigated. A comparative analysis has been made for the effect of hardening process with
subsequent grinding and ion nitriding process. For this purpose, five groups of specimens have been
manufactured. The first group of specimens has been subjected to hardening and grinding. The other
four groups of specimens have been subjected to ion nitriding with a different process duration - 4, 8,
12 and 16 hours, respectively. The experimental study has been conducted in two stages- cyclic
bending fatigue tests and residual stresses assessment trough X-ray diffraction analysis. It has been
established that the ion nitriding process has a more favorable effect on fatigue life in the field of
high-cycle fatigue compared to the quenching process followed by grinding. The positive effect by the
quenching and grinding has been observed in the field of low- cycle fatigue. The highest fatigue limit
)MPa800( 1
has been obtained for the specimens subjected to ion nitriding for a duration of
4 hours. The X-ray diffraction results show that the ion nitriding process provides greater in absolute
value compressive residual stresses compared to the quenching and grinding process. It has been
established that the distribution in depth of the axial and hoop residual stresses created after ion
nitriding is very similar. A different trend has been established between the obtained fatigue limits
and the intensity of the compressive residual stress zone.
- DOWNLOAD:
EFFECT OF ION NITRIDING ON FATIGUE BEHAVIOR OF STEEL 35HGS
- TITLE:
IMPROVEMENT OF SURFACE MICRO-HARDNESS OF 41CR4 STEEL BY MEANS OF SURFACE PLASTIC DEFORMING
- AUTHOR(S):
A. P. Anchev
- ABSTRACT:
Slide burnishing (SB) and roller burnishing (RB) are static mechanical surface treatment
methods, based on surface plastic deforming of the metal components and intended to improve the
surface integrity (SI) of these components. This article presents the outcomes of comparison between
slide diamond burnishing and RB under “micro-hardness” criterion. Due to the sliding friction
contact, SB achieves significantly bigger micro-hardness compared to RB. The significant increase
of burnishing force leads to slightly increase of the micro-hardness.
- DOWNLOAD:
IMPROVEMENT OF SURFACE MICRO-HARDNESS OF 41CR4 STEEL BY MEANS OF SURFACE PLASTIC DEFORMING
