Authors:
José G. Vargas-Hernández, María Luisa Anaya Rosas
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
The objective of the present investigation is to analyze the strategies that the companies implement and the changes that originate in the retail trade and the retail trade and in the commercial establishments in the developed countries. Based on a literary review, it identifies the framework of the current situation, encompassing all the social products and services that cause the new mechanisms of sale of products and services by the firms and the different ways of buying products and services by Los Consumers Concluding that this variation is mainly present due to the technological level, the culture of the purchase and the strategies of sale, that owns and develops the consumers and the companies.
Keywords: “Strategies, retail, commercial establishment, purchase, sale”
Authors:
José G. Vargas-Hernández, Vanessa Yesenia, Vázquez Lerma
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
The purpose of this research is to analyze the degree of effectiveness of TQM in SMEs in Mexico as a function of Business Performance,
considering that Business Performance is related to Total Quality Management. This research is analytical and descriptive, since no statistical
method is used, only the variables and the research problem are analyzed in detail and in a detailed manner, and descriptive because tables and
tables can be found to help facilitate understanding of these important concepts. This research will analyze the impact of both variables, and
with this, the entrepreneurs can make the necessary changes in their production line or in their employees to obtain better and greater positive
results.
Keywords: “Business Performance, Total Quality Management (TQM), SMEs, Effectiveness”
Authors:
Volkan ATEŞ, Necaattin BARIŞÇI
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
Electricity is natural but not a storable resource and has a vital role in modern life. Balancing between consumption and production of the
electricity is highly important for power plants and production facilities. Researches show that electricity load consumption characteristic is
highly related to exogenous factors such as weather condition, day type (weekdays, weekends and holidays etc.), seasonal effects, economic
and politic changes (crisis, elections etc.). In this study, we propose a short-term load forecasting models using artificial intelligence based
optimization technique. Proposed 5 different empirical models were optimized using flower pollination algorithm (FPA). Training and testing
phase of the proposed models held with historical load and weather temperature dataset for the years between 2011-2014. Forecasting accuracy
of the models was measured with Mean Absolute Percentage Error (MAPE) and monthly minimum approximately %1,79 for February 2013.
Results showed that proposed load forecasting model is very competent for short-term load forecasting.
Keywords: “Short-Term load forecasting; Nature-Inspired optimization; Flower pollination algorithm; Artificial intelligence”
Authors:
İbrahim Burak Koç, Anas Al Janadi, Volkan Ateş
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
Accelerators are systems where high-tech experiments are conducted today and contain high-tech constructions. Construction and operation of accelerators require multidisciplinary studies. Each accelerator structure has its own characteristics as well as similar features of accelerator structures. Control systems come to the forefront as one of the most important structures that make up accelerators. Since control systems have critical importance for accelerators, in such systems when a problem occurs, there is a danger of environmental and human safety as well as machine system. For that reason interlock systems are being developed in different structures. In the literature, FPGAs and PLCs in such interlock systems have been shown to be suitable for use in accelerators [1,7].
In this work, we describe an interlock system that evaluates the operation and protection modes of devices used in an electron accelerator. In order to ensure that this system can operate at minimum cost and maximum safety, the defined system is divided into 3 subsystems. The error messages from the control devices in the accelerator control systems are the input to the interlock system. The purpose of the interlock system that evaluates error messages is to ensure that the accelerator closes safely.
The purpose of this study is to specify which of the 3 interlock subsystems which are defined for minimum cost and maximum security should be connected to the fault outputs from the control devices. As an evaluation criterion, 6 features are defined for the control devices and each control device is weighted according to the importance of the task. In the solution of the problem, genetic algorithms were used for assigning 74 controller outputs to 3 interlock subsystems. Thanks to the Genetic Algorithm used in the study, 94.3% success rate was obtained in terms of cost and safe system.
Keywords: “Optimization, Genetic Algorithm, Accelerator”
Authors:
Yalçın KAPLAN
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
In this study, which is a source of renewable energy required to take advantage of solar energy to the maximum duration of sunshine was
estimated. In the study, values were used of the city of Amasya. Artificial neural networks (ANN) backpropagation gradient-descent(GD) learn
algorithm and genetic algorithm(GA) were used. Three hidden layer network model was designed with two inputs for ANN and GA. Between
2000 and 2010 values were used as input data monthly sunshine duration and humidity values. Output data was obtained monthly sunshine
duration of 2010. The values obtained were compared with the actual values and the root mean square error (RMSE) was calculated. Result of
the study, GA was used to calculate the values that are needed for solar energy.
Keywords: “Artificial neural network, solar energy, Sunshine”
Authors:
V. Koshevyy, O. Pashenko
Year: 2017,
Volume: 1,
Number: 1
(0 downloads)
Abstract
This paper has presented the basis of a compound multiphase waveform design with additional amplitude modulation, capable of controlling a
waveform pick-factor, suitable for use with marine radar. The waveform shows good Doppler tolerance, with the low side-lobes performance
maintained over the central zone of an ambiguity function. A clear waveform design procedure has been presented that does not require the
implementation of numerical optimization procedures. It has been shown that a compromise between side-lobes suppression and the value of
pick-factor can be found. These waveforms allow achieving better results as compared to compound multiphase waveforms without additional
amplitude modulation under mismatched weighting filtering. In this article we considered periodic mode of Radar.
Keywords: “Composite signal, Ambiguity function, Cross-ambiguity function, Amplitude modulation, Periodic mode”
Authors:
Mehmet ZİLE
Year: 2018,
Volume: 2,
Number: 1
(0 downloads)
Abstract
Occupational health and safety related to the work which is done in workplaces in general people full body health and safety provision. In our
country, the occupational health and safety risk assessment analysis moral, legal, and indirect costs has become crucial. Located in the
workplace or identification of hazards from outside intrusion. It turned into a risk of danger that led to the factors analyzed by ranking of the
risks arising from the dangers with and control measures will be utilized for the purposes of risk assessment and analysis work required. These
occupational accidents are a problem that must be resolved as a country reality. Any work that does not have security and supervision issues an
accident invitation. Today, worker health and work safety remain a problem that needs to be resolved. In this study, the penalty and legal
aspects of occupational health and safety have been examined by focusing on work accidents that have been passed on to many nominations.
Keywords: “Occupational Health and Safety, Penalty and Legal Aspects of OHS, Labor Law 6331”
Authors:
İlhami DEMİR, Selahattin GÜZELKÜÇÜK ,Özer SEVİM, Ahmet FİLAZİ, Çağrı Göktuğ ŞENGÜL
Year: 2018,
Volume: 2,
Number: 1
(0 downloads)
Abstract
Sulfate is a major chemical threat to concrete and reinforced concrete structures. In this study, a micro-structural analysis of the effects of
sulfate on cement mortars with blast furnace slag substitution was conducted. To observe the effect of blast furnace slag on cement mortar, blast
furnace slag substitution was made instead of CEM I 42.5 R cement at different ratios. Mechanical properties, length change and micro-structures
of samples cured in potable water and 10% Na2SO4 solution for 7, 28, 90 days were analyzed. When the results of compressive strength and
length change were examined, it was seen that compressive strengths and length change values increased in time. The length change values were
found to be higher in the sulfate environment. The blast furnace slag in the sulfate environment has reduced the percentage of length change. A
comparative chemical analysis of the samples, C-S-H (Calcium Silicate Hydrate), CH (Calcium Hydroxide) and Ettringite developments were
presented in terms of micro-structural properties. As a result, it was observed that CH gels develop in 7 day samples, C-S-H gels in 28 day
samples, and ettringite in samples cured in % 10 Na2SO4 solution for 90 days.
Keywords: Micro-structure, Blast-furnace slag, Sulfate effect, Cement mortar
Authors:
Onur Derse, Elifcan Göçmen
Year: 2017,
Volume: 2,
Number: 1
(0 downloads)
Abstract
Container terminal includes logistics activities that are needed to processing of containers considering cost, time and environmental issues. This
makes terminal management problems important. These problems aim to decide the efficient planning of the terminals considering the cost and
time minimization. Terminal operations include the movement of the full and empty containers between gateways of the terminals and berths
by transport modes. Cranes and trucks are used in the study for the transportation. In this study, management of container processes problem
has been proposed. The problem aims to perform the movement of the containers at the terminal efficiently. A simulation modelling approach
has been proposed and solved by Arena software.
Keywords: “Terminal Vehicle Movements, Transport of Containers, Simulation”
Authors:
ONUR ARSLAN
Year: 2018,
Volume: 2,
Number: 1
(0 downloads)
Abstract
Accurate evaporation prediction is significant for the management of water resources systems. The advantage of empirical formulas is that they
don’t require a lot of parameters. In this study, evaporation values of meteorological stations located in Konya Closed Basin and basin-wide
evaporation values are predicted with the developed empirical formulas (DEF). The formula is formed by adding the mean temperature term to
Meyer empirical formula (MEF) and the coefficients are determined by linear regression analysis. For this purpose, 70% of mean monthly water
vapour pressure in air, relative humidity, wind speed, temperature and evaporation values of Cihanbeyli, Niğde, Beyşehir, Aksaray and Karaman
meteorological stations located in the basin between 1978 and 2017 were used for modeling stage and 30% for test stage. The results obtained
from the DEFs were compared with the results obtained from MEF via determination coefficient. Konya Closed Basin, in where Beyşehir and
Salt Lakes are located, is an important ecological area. Evaporation prediction in the basin, where severe droughts are experienced, is important
for the management of water resources systems. It was determined that the determination coefficients obtained from the DEFs were higher than
the determination coefficients obtained from MEF at both the training and the test stages. These results show that the DEFs gave better results
than MEF and they can be used for evaporation prediction in the places where evaporation values are not measured or contain missing data.
Keywords: “Evaporation, Developing Empirical Formula, Meyer Empirical Formula (MEF), Konya Closed Basin”
Authors:
Munise Didem DEMİRBAŞ, Didem ÇAKIR
Year: 2018,
Volume: 2,
Number: 1
(0 downloads)
Abstract
In this study, trained models were obtained by using Artificial Neural Network (ANN) in order to determine the equivalent stress levels of
one dimensional functionally graded rectangular plates. In this training set, a single layer sensor model was used according to our linear
problem. With ANN, the models were trained by changing parameters the number of different iterations, number of neurons and learning
algorithms. and the trained model was tested and its performance was measured.
In our study, thermal stress analyses were performed for different compositional gradient exponents using finite difference method to
constitute data sets. The data sets were constructed for the smallest value of the largest value of the equivalent stress levels, the greatest value
of the greatest value of the equivalent stress levels, the greatest value of the smallest value of the equivalent stress levels, and the smallest value
of the smallest value of the equivalent stress levels. Five different training algorithms were used in our training network: Levenberg-Marquardt,
Back Propagation Algorithm, Momentum Coefficient Back Propagation Algorithm, Adaptive Back Propagation Algorithm and Momentive
Adaptive Back Propagation Algorithm. The Levenberg-Marquardt algorithm is found to be more efficient than the other algorithms.
With this study, trained models have been developed to provide time and job savings to determine equivalent stress levels in functionally
graded plates, which are very important for high temperature applications. These educated models will provide important contributions to the
literature and will be a source for the work to be done in this regard.
Keywords: Functionally graded plates, artificial neural network, single layer model, Levenberg-Marquardt algorithm, finite difference method, thermal stress analysis
Authors:
Cem Boğa
Year: 2018,
Volume: 2,
Number: 1
(1 downloads)
Abstract
This study relates to the determination of radial and tangential stresses and radial displacements in a hollow cylinder made of functional
graded material (FGM) subject to internal pressure both analytically and using ANSYS APDL and comparison of the results. The material
properties of the FGM cylinder vary depending on a simple power function in the radial direction along the thickness. It is assumed that the
Poisson's ratio is constant in the radial direction. Under infinitesimally small deformations, radial and tangential stress and radial displacements
on the basis of the differential equation regulating the elastostatic behavior of an FGM cylinder using the plane strain and axial symmetric load
assumptions state and field equations were obtained for the analytical solution. The FGM cylinder subjected to internal pressure effect is
modeled using dummy thermal loads in ANSYS APDL. The results of radial and tangential stress and radial deformation along the thickness
are obtained for four different FGM types and are shown graphically. Analytical and ANSYS results were compared and found to be in one
accord. In this study, elastic analysis of the FGM cylinder was aimed to enable the results to be obtained without having to deal with
complicated mathematical expressions.
Keywords: “Functionally graded material, Simple power function, Internal pressure, Cylinder, Elastic analysis”
Authors:
Munise Didem DEMİRBAŞ, Didem ÇAKIR, Sibel ARSLAN, Celal ÖZTÜRK
Year: 2018,
Volume: 2,
Number: 1
(0 downloads)
Abstract
In this study, the sets of equation were extracted by Genetic Programming (GP) for thermal stress analysis of one-dimensional functionally
graded rectangular plates. First, thermal stress analyses were performed using a finite difference method for a sufficient number of
compositional gradient exponents. Then, equation sets were obtained by the GP using the maximum and minimum equivalent stress levels
obtained from these analyses. Appropriate models are produced for equivalent stress levels at compositional gradient exponents. The models
achieved these levels 100 times faster than the finite difference method by using GP. GP provided significant time gain in deriving sets of
equations for thermal stress analysis of plates with current boundary conditions.
Keywords: “Functionally graded plates, genetic programming, finite difference methods, thermal stress analysis.”
Authors:
Mustafa Yaşar, Salih Yazıcıoğlu
Year: 2018,
Volume: 2,
Number: 2
(0 downloads)
Abstract
In the construction sector, constructions, painting, heat insulation, coating and so on. Outside facade scaffoldings are widely used in outdoor
facade applications. The floats consist of temporary elements which are designed to support various loads in the constructions and to provide
convenience for the applications made on the exterior sides of the constructions. In this study, exterior scaffold components consisting of
prefabricated components and classification of scaffolds according to the purpose of use are included. Furthermore, since pre-fabricated steel and
aluminum alloy components used in exterior scaffold installation need to be designed and installed in a capacity that can withstand all kinds of
loads statically and dynamically with respect to environmental impacts, what is required of the test works related to testing of the prefabricated
components against loads and external influences exposed in the site environment before they are used in the sites. In 2017, a company that
manufactures prefabricated steel exterior scaffolding in Elmadağ district of Ankara has examined the tests that should be done at the production
site in accordance with the TS EN 12810-1 Scaffolding certification. Experiments that the laboratory has been done in laboratory have also been
examined according to the requirements of TS EN 12810-1 standard. In the conclusion part of the work, the importance of external scaffolding
in terms of occupational health and safety has been explained instead of the external scaffoldings which are laid out with the inadequate
components required by the standards without the engineering.
Keywords: “Building equipment, temporary work equipment, facade scaffoldings, safe scaffolding system”
Authors:
Ahmet Karaarslan, Şaban Çetin
Year: 2018,
Volume: 2,
Number: 2
(0 downloads)
Abstract
In this study, the common misconceptions are identified and regarding solutions are offered for Electrical and Electronics Engineering students. From the standpoint of knowledge, most important substructure of education is concept teaching. The biggest obstacle to be faced in concept teaching is misconceptions that can be avoided by researches. According to previous studies, students’ success, interest and motivations regarding the electrical and electronics field is lower compared to other fields. One of the reasons of this is that, the concepts being used are notional and students fail to make these concepts meaningful. As a result of this structure, they are faced with learning difficulties. These learning difficulties set the basis of misconceptions of students. By this study, a conception test is created in order to determine misconceptions. The test consists of one right choice, expected misconception and a wrong choice which is not related with the subject. Also, there are open-end questions at the end of each test question in order to determine the students’ views regarding their choices. By the result of content analysis, student common misconceptions are determined and solutions are offered to avoid these misconceptions.
Keywords: “Misconceptions, Improving Classroom Teaching, Teaching/Learning Strategies”
