TOJSAT - Volume 7 - Issue 1 - January 2017
A CASE STUDY OF SHE (SOLAR-HYDROELECTRIC) IN TURKEY Mahir DURSUN, M. Fatih SALTUK
Abstract:
Nowadays, energy and source requirements are significant issues, as in the past.
Besides, renewable energy sources that especially hybrid energy systems and their usages have
been very popular in recent years because of a lot of reasons. In this study, efficiency of solar-
Hydro Electric (SHE) is compared with hydro energy and solar energy systems and a case
situation is computed with real data and it is clarified the efficiency, generation, cost and
available credibility items of system in Turkey. Energy efficiency, systems cost, investment
repayment period, operation expenditures, available energy credibility and optimum energy
costs are computed and shown in study. Electricity generation of solar is calculated by PVsyst
program. Generation and capacity utilization rates of systems are shown in graphics.
A COMPARATIVE PERSPECTIVE ON WOMEN IN THE 19TH CENTURY THROUGH LITERATURE Zuhal EroÄŸlu
Abstract:
19th century is a very hot period in terms of scientific developments, economical and
sociological transformations. Accordingly, the economic and social conditions of people were
changing dramatically. Yet, no doubt that it was a patriarchal society and that the stage belonged
to men even though women gradually started to appear on the stage as well. There were Great
Expectations, hopes and fights for the future among men. Even after the fact that women’s rights
started to be advocated, the approach towards women did not really change easily. Although their
existence in society was visible now, its limits were smartly drawn. Literature has a very
interesting role here because it both helped women to enlarge their world and drew the line of
the individuality at the same time. The depictions of women in the narratives of the male authors
in this period show how it works. In this paper I am going to analyze two novels from two
different cultures: The Blue and the Black (Mai ve Siyah) by Halid Ziya Uşaklıgil and Great
Expectations by Charles Dickens. In these novels we can see both the world of women in this
period vis-à-vis men and how literature works to draw the line for women socially and
economically.
A QUALITATIVE ANALYSIS OF EFL WRITTEN CORRECTIVE FEEDBACK Ä°hsan ÃœNALDI
Abstract:
This study focuses on the qualitative aspects of written corrective feedback provided by Turkish teachers of English as a foreign language. The participants were 171 teachers working at state schools in Turkey. The participants were provided with an essay written by a B1 level 20-year-old Turkish EFL learner. They were asked to evaluate the essay and write feedback to the learner. The results were analyzed through an inductive approach; the themes and recurring ideas were watched for without any predetermined concepts or categories. The results revealed that the feedback given to the learner varied to certain extents; a number of categories emerged during the analysis. However, it was concluded that the expectations of EFL teachers from a written text in English focused dominantly on grammatical accuracy.
ANALYSIS OF LYMPHOCYTE IMAGES FOR DIAGNOSING RHEUMATOID ARTHRITIS USING THRESHOLD SEGMENTATION METHOD WITH SLIDER CONTROL Chokkalingam Subramanian, Komathy Karupannan, BrahimBelhaouari Samir
Abstract:
Medical images today help bring to divulge hitherto concealed knowledge about diseases that were, at one time, rarely subject to intense and prolonged scrutiny and analysis. In recent times, however, imaging has gone a long way in helping establish plausibly both the causes and behavioural patterns of a given disease. The objective of this paper is to constitute a series of techniques to detect accurately, in lymphocytes from blood smear images, the occurrence of Rheumatoid Arthritis (RA). This paper has used computer-aided diagnosis for accuracy and consistency, and the threshold segmentation method with slider control as a proposed segmentation method for lymphocyte extraction from blood smear images, precisely because it performs much better than existing segmentation methods. The paper discusses critical medical parameters - such as area, perimeter, circularity, roundness and solidity - from segmented lymphocytes, and also describes the ADTree method governing classification and decision rules. The final part of the paper deals with a case study on datasets of inflamed and non-inflamed types (for three different medical cases) using correlation and Analysis Of Variance (ANOVA) techniques to discover the homogeneity and relationships that exist between the critical parameters listed above for identifying the status of RA.
ANALYZING CPU SCHEDULING ALGORITHMS ACCORDING TO WAITING TIMES - A CASE STUDY Ruya SAMLI
Abstract:
In multiprocessing operating systems, maximum CPU utilization is one of the most important goals. To obtain the maximum rate, the processes in the CPU queue must be scheduled properly. There are several scheduling algorithms to decide this process order as First-Come First-Served Scheduling, Last-Come First-Served Scheduling, Shortest Job Scheduling, Random Scheduling etc. This paper presents a case study to examine which of these scheduling methods is the most efficient one between these policies according to total waiting times.
CARBON FOOTPRINT DETERMINATION OF A TURKISH CEMENT FACTORY Betül ÖZER
Abstract:
Carbon footprint can be defined as the carbon dioxide (CO2) equivalent of greenhouse gas (GHG) emissions caused by anthropogenic activities (such as transportation, energy generation, services or purchasable products, etc.). The carbon footprint of a facility can be determined due to reasons such as legal obligations, social responsibilities, customer demand, or reduction of GHG emissions. In this study carbon footprint of a cement factory is ascertained. The amount of greenhouse gas emissions from the factory is 1,64 million tons of CO2 in 2014. 65% of them come from clinker production and the remaining comes from combustion, mainly petroleum coke which has the largest share of approximately 30% of contribution. It will be a good opportunity for the factory to use waste oil and end of life tires (ELT) as alternative fuels to mitigate its the carbon footprint.
COMPARISON OF SUGAR AND ORGANIC ACID CONTENTS OF TURKISH ORANGES JUICES Serkan SELLI
Abstract:
Two different orange juices obtained from cvs. Kozan Misket and Kozan Yerli were compared in terms of sugar and organic acid composition. These two parameters are important in determining the ripeness of fruits. Samples were obtained from Cukurova region of Turkey and the analysis was carried out by high-performance liquid chromatographic methods. Four organic acids (citric, ascorbic, malic and succinic acids) and three sugars (sucrose, glucose and fructose) were determined. Sucrose had the majority in sugars in both samples with the concentration of 61.02 g/l in Kozan Misket and 63.23 g/l in Kozan Yerli, respectively. With regard to organic acids, citric acid was found to be present in the largest amounts having concentration of 16.25 g/l in Kozan Misket and 15.90 g/l in Kozan Yerli in both samples.
DETERMINATION OF SURFACE CHARACTERISTIC OF ATMOSPHERIC PRESSURE PLASMA MODIFIED POLYMERIC ULTRAFILTRATION MEMBRANE VIA CONTACT ANGLE MEASUREMENTS Irem Damar Hunera, Hacı Ali Gulec
Abstract:
The aim of this study was to improve the surface hydrophilicity of ultrafiltration membrane (UP150, PES, MWCO; 150 kDa) by using atmospheric pressure argon plasma jet (APAPlJ) modification system. Argon was selected as a precursor gas and three different distances between nozzle and substrate surface (25-30-35 mm) and three different exposure period (1-5-10 times) was applied during APAPlJ modifications. The effect of APAPlJ modifications on the membrane surface evaluated by contact angle measurements, surface free energy (SFE) method and xVDLO theory. APAPlJ modification was able to change membrane surface properties. More hydrophilic surface properties were obtained by APAPlJ modifications using 25 mm of distance of nozzle to substrate surface and 5 times of exposure period. Under these conditions, the water contact angle was decreased from 63.5 to 34.6°. The base component of SFE was increased 5 times and Giwi value was increased from -45.0 to 28.7 mJm-2.
FRICTION AND WEAR BEHAVIOR OF PLASMA TRANSFERRED ARC COATING ON AISI 4140 STEEL OF BORON CARBIDE AND NICKEL POWDER MIXTURE Gökçe Mehmet AY, Osman Nuri ÇELİK
Abstract:
Reducing effect of wear and friction is an important research area in machine design. In order to reduce these effects; lubrication, heat treatments and coatings are used on machine parts. Hard coatings are used in wear intensive environments and Plasma Transferred Arc (PTA) Coating is an innovative hard coating method. PTA coatings are used in applications such as automotive valves, glass and ceramic molds and plastic extrusion dies. PTA coating properties are gained from coating powder, thus coating powder research is an important aspect. In this study microstructure and wear behavior of AISI 4140 steel surface coated by Boron Carbide was inspected. Two different mixtures was prepared, Ekabor II ™ powder that contains Boron Carbide and pure Boron Carbide was mixed with a Nickel base to produce two different coating powder recipes. Wear tests were conducted on a Ball-on-Disk device with circular geometry. Optical and Electron Microscopy was used to characterize microstructure of coating layer formed on the surface of AISI 4140.
INVESTIGATION OF TENSILE STRENGTH AND ELONGATION PROPERTIES OF BASALT FIBER-PUMICE REINFORCED POLYPROPYLENE COMPOSITES Sabih OVALI, Süleyman İlker MISTIK
Abstract:
Basalt fibre is obtained from volcanic basalt rocks. The manufacture of basalt fiber requires the melting of the basalt rock to about 1400°C. Its chemical structure is nearly related to glass fiber. It has slightly better mechanical properties than glass fiber. Basalt fiber has great potential application to composite manufacturing. In this study, multiaxial fabrics were produced from basalt filaments. Multiaxial basalt fabric and pumice stones were used as reinforcement material for the production of the composite structures. Polypropylene was used as resin. Finally multiaxial basalt fabric-pumice stone reinforced polypropylene composites were produced by using hot press compression machine. Then modulus of elasticity, tensile strength and elongation properties of the thermoplastic composites were investigated.
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FRICTION WELDED IRON ALUMINIDES Osman Torun
Abstract:
Fe–40Al alloy were welded by the friction welding technique. Samples were welded for different welding time under a constant forging and friction pressure at 1000 rmp. Microstructures of the welds were examined by optical microscopy. The results showed that the welded samples were free of any pore or crack along the weld interface except for 3s. The micro hardness of the welded samples was measured. The strength of the welds was determined by the shear tests. It was observed that the shear strength of the welds depended on the welding time. The maximum shear strength was 466, 8 MPa.
ON THE HISTORY OF SOME LINEAR ALGEBRA CONCEPTS:FROM BABYLON TO PRE-TECHNOLOGY Sinan AYDIN
Abstract:
Linear algebra is a basic abstract mathematical course taught at universities with calculus. It first emerged from the study of determinants in 1693. As a textbook, linear algebra was first used in graduate level curricula in 1940’s at American universities. In the 2000s, science departments of universities all over the world give this lecture in their undergraduate programs. The study of systems of linear equations first introduced by the Babylonians around at 1800 BC. For solving of linear equations systems, Cardan constructed a simple rule for two linear equations with two unknowns around at 1550 AD. Lagrange used matrices in his work on the optimization problems of real functions around at 1750 AD. Also, determinant concept was used by Gauss at that times. Between 1800 and 1900, there was a rapid and important developments in the context of linear algebra. Some theorems for determinant, the concept of eigenvalues, diagonalisation of a matrix and similar matrix concept were added in linear algebra by Couchy. Vector concept, one of the main part of liner algebra, first used by Grassmann as vector product and vector operations. The term ‘matrix’ as a rectangular forms of scalars was first introduced by J. Sylvester. The configuration of linear transformations and its connection with the matrix addition, multiplication and scalar multiplication were studied first by A. Cayley. After the 1900s, the improvement of linear algebra was more technique and in a way that more correlative with other disciplines of mathematics than past. Heisenburg used matrix algebra for quantum mechanics. Von Neuman and Turing introduced stored-program computers.
PHYSICAL AND ECONOMIC ANALYSIS OF THE POTENTIAL WIND ENERGY PLANT IN SINOP/ TURKEY Yalçın ALCAN
Abstract:
The use of renewable energy sources is rapidly increasing in the world and in Turkey. Wind energy from these sources, is more attractive to investors when compared to other renewable energy sources due to the installation and operation costs. Electrical energy from wind sources in the coastal area usually has production potential. For instance, if the wind map of Turkey is examined it can be seen that electrical energy production from the wind sources in the coastal area has production potential. Sinop, which is located in the Black Sea coastline, is an efficient point for wind energy investment because of its geographical structure. In this study, in order to be a model, potential points for the electric power from wind sources in the Sinop have been identified. Then, the scale and size of a potential power plant from wind energy which can be installed in Sinop have been investigated. Lastly, its installation and operation costs have been calculated.
POSTAL MARKET LIBERALISATION AND ITS IMPACT ON THE MAIL SUPPLY CHAIN: THE CASE OF TURKEY Mehmet YiÄŸit TÃœRKMEN
Abstract:
As a candidate country for European Union membership, Turkey is on the way towards liberalising its postal market. Not only will such liberalisation introduce competition in the postal market in which Post and Telegraph (PTT) Corporation, was the monopoly, but also it will result in spreading out of the new entrants into the PTT Corp's supply chain in several ways. The literature has barely touched upon the impact of the technological substitution and incoming liberalisation on the supply chain of the Turkey's ex-monopoly. Providing examples from the exmonopolies of the European Union, the purpose of this study is to examine the effects of the liberalisation of the postal market in Turkey on the PTT Corp's supply chain. The study highlights the ways in which the new entrants penetrate into the postal market using desk-based research. Moreover, it investigates the competition from a supply chain perspective.
PREDICTION OF ASH CONTENT FOR COARSE CLEAN COAL PREPARED WITH HEAVY MEDIUM DRUM BY ARIMA(1,0,1) MODEL Adem TAÅžDEMÄ°R
Abstract:
The aim of this research is to model the ash content of +18 mm clean coal product obtained by a heavy medium drum at Dereköy coal preparation plant in Turkey by a time series model. The drum was operated 355 days in 2010 and its one year of daily as-received ash content data of +18 mm clean coal was used for evaluation by an ARIMA time series model. The ash data was found non-normal distribution and to fit log-normal distribution well. The ARIMA(1,0,1) time series model determined for the log-transformed data was the best model to represent the ash content of +18 mm coal. This model was shown to be used conveniently within the 95% confidence interval for estimating the ash contents that will be produced in short time period.
QUANTUM SHAPE KINEMATICS Furkan Semih Dündar, Barış Tamer Tonguç
Abstract:
Shape dynamics is a theory first proposed by Julian Barbour which states that physics happen uniquely in the reduced configuration space of a theory. So far, studies in the area have focused on gravitational systems. Here we first contemplate on the implications of this idea on quantum mechanics. We summarize the idea of shape dynamics and then give physical configurations of multi qubit systems. Our aim in the grand picture, is to initiate a research program translating classical shape dynamics to quantum realm.
RSSI BASED CLUSTERING ALGORITHM FOR WIRELESS SENSOR NETWORKS Naim Karasekreter, Fatih Başçiftçi, Uğur Fidan
Abstract:
Technological developments on wireless communication systems and sensors productivity-enhancing wireless sensor networks have led the development of new algorithms. Wireless sensor devices (nodes) were developed along with the use of these two cases, and data collected has been achieved forwarded to a central location. Studies in the literature were shown that, WSN (wireless sensor networks) systems are focused on the detection the position of the nodes in the network and worked for energy efficiency. One of the major activities in the wireless sensor network is to create their own organizing clusters with selected cluster head, each cluster can send the data. Cluster head selection is based on a random number that is above the threshold value is calculated by the addition of the number, etc. parameters of nodes in the network or having highest energy value. In this study, the cluster head selection is performed by calculating a distance between nodes in the cluster. Distance information is obtained from RSSI (Received Signal Strength Indicator). Each node in the network, all nodes can communicate with them on the record and finds the average RSSI level. The highest average per cluster node is selected and published in this case to the other node. The cluster head node will include its own cluster the node that is lower than the average RSSI. Cluster head selection and clustering process continues with iterations until all nodes clustering in the network. Experimental studies conducted with simulation program developed C # .net environment and network efficiency are investigated. In the results, the cluster is first created which settled in the center of the network, and the center population was determined to be more than others. In this case, a threshold value must be determined for correcting the data next to the average RSSI. So, accordingly the necessity of re-aggregation network is detected.
SCREENING OF PKS/NRPS GENE REGIONS ON MARINE DERIVED ACTINOBACTERIA Kadriye ÖZCAN
Abstract:
Marine derived actinobacteria are very valuable organisms because of unique abillities. The goal of this study was to investigate potential of production bioactive metabolite from marine derived actinobacteria. Eight actinobacteria were screened by PCR based techniques. Results showed that many isolate positive for NRPS (62,5%) and PKS (37,5%) genes. According to the PCR screening marine erived actinobacteria from Black Sea have significant biosynthetic potential. As a results highlighted that marine sediments represented potential sources for discovery of bioactive secondary metabolites.
THE EFFECT OF RESERVOIR LENGTH ON THE EARTHQUAKE BEHAVIOR OF ROLLER COMPACTED CONCRETE DAMS Murat CAVUSLI, Ismail Hakki OZOLCER, Murat Emre KARTAL, Muhammet KARABULUT, Seda COSKAN
Abstract:
Finite element analysis is an effective method for evaluating roller-compacted concrete (RCC) dams in the earthquake zone and investigating earthquake response of RCC dams. The primary aim of this research is to inspect the effect of various reservoir lengths on the earthquake response of a selected RCC dam under strong ground motion effect. This study presents two-dimensional earthquake response of Cine RCC dam considering geometrical and material non-linearity in time-history analyses. The Drucker-Prager material model is used in the materially non-linear analyses for concrete and also foundation rock. The reservoir length of RCC dam is modeled respectively as half, itself, two times, three times, five times and ten times of the dam height. The dam–reservoir-foundation interaction is modeled by the contacttarget element couples. The hydrodynamic pressure of the reservoir water is modeled with two dimensional fluid finite elements based on the Lagrangian approach. 1999 Duzce Earthquake acceleration records are considered in all dynamic analysis. According to non-linear time history analyses, the horizontal displacements and principle stress components are compared and evaluated.
THE IMPORTANCE OF ONTOLOGY IN SOFTWARE ENGINEERING EDUCATION PROGRAMS Zeynep Altan
Abstract:
Since late 1970s (Yordon Structured Design, DeMarco Structured Analysis) and early 1980s (Structured System Analysis and Design Method -SSADM) to early 1990s (Booch Method), software developing methodologies have planned to model system building. As the real world problems became more complex and software industry became more complicated, software engineering education has been a necessity as a separate discipline. The Guide to the Software Engineering Body of Knowledge (SWEBOK) was published in 2004 after the description of a sequence of software engineering standards. These standards began to be specified in 1976 by IEEE Computer Society. On the other hand, the radical changes on the context of software problems arose object technology. The revolution of object technology took many years. As the consequence of different practices, a new software development approach Model-Driven Engineering (MDE) developed by Object Management Group (OMG) focused on models as the primary artifacts for development process. The processes have been implemented with transformations mapping information from one model to another. The integration of knowledge in different models depends on the existence of explicit declarative semantic models. Therefore, increasing diversity and complexity of information gave rise to increasing interests on ontologies. These formal domain models have been linked to each other on the Web. The linked ontologies provide shared terminologies for different applications. In 2013, the Knowledge Areas (KAs) in SWEBOK 3.0 have also been rearranged according to these complications of the real world problems. Formal and informal solution techniques, latest development methods and new technologies have been included to guide the software engineering education programs.
THE ROLE OF COOKERY VOCATION IN THE TOURISM SECTOR ON WOMEN EMPLOYMENT Mutlu DOÄžAN
Abstract:
Tourism sector makes many contributions to country economies from creating an important share with regard to national income to providing employment opportunities as a dynamic sector. Thanks to this position, tourism sector has become an important sector for developing countries such as Turkey where unemployment problems are experienced. Satisfaction from the service provided in the tourism sector is among the most important conditions for the sustainability of the success of this sector. The food and beverage departments of the accommodation establishments which are part of this sector have a critical importance for both customer satisfaction as well as the economic contributions provided to the accommodation facility. The success of the food and beverage department has direct effects on the success of the accommodation establishment. Male employment has been more dominant in this sector due to the long working hours, intensive weekend schedules as well as tasks that require physical strength. Marriage is also an important factor that has negative impact on the participation of women in this sector. When it is taken into account that the food and beverage services play an important role in customer satisfaction related with accommodation establishments, the importance of trained personnel in this field becomes even more important. Recently, female students who graduated from the Culinary Arts and Gastronomy departments of universities that have started to increase in number started to take place in the food and beverage departments thus contributing to the presentation of a more quality service.
TUMOR DETECTION ON CT LUNG IMAGES USING IMAGE ENHANCEMENT Kamil DIMILILER, Buse UGUR, Yoney K. EVER
Abstract:
Last three decades, early cancer detection and researches on early detection solutions play vital role for human health. Computed tomography images (CT) are widely used in radiotherapy planning because they provide electronic densities of tissues of interest which are mandatory to a correct dose computation. Furthermore, the good spatial resolution and soft/hard tissues contrast allow precise target delineation. Also, CT techniques are preferred compared to X-Ray and MRI images. Image processing techniques have started to become popular in use of CT images. In this study, image pre-processing, image erosion, median filtering, thresholding and feature extraction of image processing techniques are applied on CT images in detail. The aim of this study is to develop an image processing algorithm for lung cancer detection on CT Images.
VACATIONING AT A DESTINATION UNDER TERORISM RISK: TOURISTS’ DESTINATION IMAGE PERCEPTIONS ABOUT ISTANBUL Süphan NASIR, M.Talha YILMAZ
Abstract:
The main purpose of this study is to analyze the consequences of terror related risks on destination image perceptions of tourists who are vacationing at a destination under terrorism risks. The survey was conducted with tourists, who were visiting Istanbul during a risky period. Before surveying with tourists, several terrorism attacks had took place in Istanbul. This study investigates the impact of terrorism activities on tourists' destination image perceptions of Istanbul as a travel destination, and also its impact on destination satisfaction, which in turn influence tourists revisit intentions and word of mouth behavior. The survey was conducted with 156 respondents at the Sultan Ahmet Square. Destination image of Istanbul is assessed with the destination atmosphere, travel environment, attraction & events, shopping, accommodation, and dining dimensions. Although tourists are vacationing at a destination under terrorism risk, results of this study indicate that the destination image of Istanbul is positive in the mind of tourists. Visiting Istanbul is quite valuable in terms of emotional, functional and overall values. Overall, respondents are highly satisfied with their decision to travel to Istanbul and strongly agree that it is right choice to visiting Istanbul. Majority of the respondents indicated that they are satisfied or extremely satisfied with their visit to Istanbul. Lastly, the findings showed that tourists, who visited Istanbul under terrorism risks, are highly satisfied with their travel experience and expressed that they will recommend Istanbul to others, say positive things about Istanbul, and they stated that they are willing to revisit Istanbul.
