TOJSAT - Volume 6 - Issue 2 - April 2016
A PLANAR ROBOT DESIGN AND CONSTRUCTION WITH MAPLE Engin CAN, Özkan CANAY
Abstract:
Maple is used to do numerical computation, plot graphs and do exact symbolic
manipulations and word processing. In this study we demonstrate how Maple can be used for
the simulation of a planar robot. This offers the possibility to become familiar of mathematical
modelling. The mechanism under consideration is a so-called F-mechanisms (Can & Stachel,
2014), i.e., a planar parallel 3-RRR robot with three synchronously driven cranks. It turns out
that at this example it is not possible to find the poses of the moving triangle exactly by
graphical methods with traditional instruments only. Hence, numerical methods are essential
for the analysis of motions which can be performed by a planar robot.
A STOCHASTIC-OPTIMIZATION MODEL FOR DETERMINING THE OPTIMAL MICRO-SITING OF WIND TURBINES Akiner Tuzuner, Issa Almassri, Selcuk Goren
Abstract:
We propose a general model for the placement of wind turbines in a rectangular grid
formation over a flat area. For better realism, we consider stochastic wind speeds and directions,
in conjunction with the wake effects that upstream turbines impose on downstream ones. The
objective is to pack as many turbines as economically optimal in a given area, i.e. to maximize
the expected MW output per dollar of capital investment and O&M costs per meter square. Due
to the complex structure of the mathematical model, we apply a hybrid approach of Monte-
Carlo sampling of wind speeds and directions together with the Nelder-Mead heuristic method
to search for the optimal horizontal and vertical spacing of the turbines. Results of a case study
based on a real dataset of wind speeds and directions, a selected commercial turbine’s
approximated power curve, and industry estimates of costs is discussed.
AN INQUARY STUDY OF NiO FILMS DEPOSITED WITH SOL-GEL SPIN COATING Guven Turgut
Abstract:
Y incorporated nickel oxide thin films have been deposited via sol-gel route by using
spin coater. The structural, morphological and optical properties of films have been inquired.
The films had nano-sized polycrystalline cubic structure. The optical characterizations
indicated that the band gap and Urbach energy continuously went up with Y contribution. The
present investigation reveals the properties of nickel oxide are healed and controlled with Y
contribution and these films are probably good candidates for various applications.
COMPARATIVE ANALYSIS OF CURRENT METHODS IN SEARCHING OPEN EDUCATION CONTENT REPOSITORIES Benneaser John, V. Thavavel, Jayakumar Jayaraj, A. Muthukumar, Poornaselvan Kittu Jeevanandam
Abstract:
The current generation of learners are living in a eConnected society where the
technology and content are open. Open learning enables learners to be self-determined and
interest-guided. To make online learning successful, it is critical that learners need effective
ways of finding the appropriate learning resources. However, due to the generally
unstructured nature and overwhelming quantity of learning content, effective learning remains
challenging. This study compares different features offered by the Open learning content
search platforms, and analyzes the past one-year website usage metrics data to gather insights
about the usage. This paper also discusses the gaps in the current Open Content search
dilemma and proposes potential solutions.
CREATING ONTOLOGY BASED CONCEPT MAPS WHICH CAN BE QUERIED IN COMPUTER ENVIROMENT Mehmet Milli, Emre Ünsal, Özlem Aktaş
Abstract:
Nowadays, Semantic web and ontology applications which came with it, are
commonly used in social media, entertainment and shopping sites. But usage of semantic web
in education field is limited. Semantic web applications are useful developing tools and ELearning
objects can be used for creation and editing. It is important that Individuals on the
internet arrange educational techniques based on their interests and needs (Stutt & Motta 2004).
Thus, it is envisaged that, semantic web applications will have large contribution conception
when moving to individualized education in future education. The aim of this study is to create
concept maps for educators, which is one of the significant learning techniques and widely
applied in the teaching process, by using ontologies. In accordance to this aim, an ontology
based system made with “Protégé 4.3” developing tool based on RDF(Resource Description
Framework) language and can be queried in E-Learning environment by using ontology query
language SPARQL (SPARQL Protocol and RDF Query Language). Moreover, the developed
system is able to present concepts visually to educators, which could not be done by concept
maps generated with classic methods and ensured to access textual information. Therefore,
students are able to perform better relations between former and recently learned concepts and
achieve constructive learning easier. In future studies, ontology based concept maps which is
only used as learning material in education phases, are expected to be used more effectively
also in planning, learning and evaluation stages.
ELASTIC FOUNDATION EFFECTS ON THREE DIMENSIONAL ARCH DAMS Muhammet KARABULUT, Murat Emre KARTAL, Murat CAVUSLI, Derya TANRIVERMIS, Bayram KAYALAR
Abstract:
Dynamic effects on an arch dam should be taken into account together with gravity
and hydrostatic pressure for the most critical conditions. This study presents three-dimensional
linear earthquake response of an arch dam. Different soil parameters and ground motion
accelerograms are used in the finite element analyses. The Type 3 double curvature of an arch
dam which is one of the five type models suggested in Arch Dams Symposium organized in
England in 1968 is considered in this paper. All numerical analyses are carried out by SAP2000
program for empty reservoir case. In the scope of this study, modal analyses and modal timehistory
analyses are performed using three dimensional finite element model of the arch dam
and arch dam-foundation interaction systems. According to numerical analyses, maximum
horizontal displacements and principle stresses are shown by height and also evaluated
earthquake for various soil conditions and earthquakes. Besides this study clearly appears that
the soil conditions are very effective on the dynamic response of an arch dam.
EXPERIMENTAL INVESTIGATION OF DUCTILITY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH POLYPROPYLENE FIBERS Rıfat SEZER, Abdulhamid ARYAN
Abstract:
The purpose of this study is to research both the performance of the reinforced
concrete beams without fiber and the performance of the reinforced concrete beams with fiber.
For this purpose, the experimental load - displacement curves of beams were formed and the
areas under these curves were compared. According to the results of this comparison, it is
concluded that the reinforced concrete beams with polypropylene fiber are more ductile. The
dimension of the used beam-samples for test in this study is 20x30 cm, their length is 200 cm
and their scale is ½. The reinforced concrete reference-beams are produced as two items and
the reinforced concrete beams with P-0.60 kg/m3 polypropylene fiber are produced as three
items.
FRICTION AND WEAR PERFORMANCE OF HIGH DENSITY POLYETHYLENE / STYRENE - BUTADIENE RUBBER POLYMER BLENDS Sezgin Ersoy
Abstract:
In the present work, the friction and wear property of high density polyethylene /
styrene - butadiene rubber polymer blends was studied. SBR addition in the HDPE was 5, 10,
15, and 20 wt. In this study indicate that HDPE / SBR polymer applied to the abrasion test
indicate that road and load values to increase the effect of wear, but this effect by increasing
the rate of SBR additives lead to a reduction in wear is observed that value as %. The result
showed that the addition of fillers to the composite changed the friction coefficient and wear
rate.
LOW COST WIRELESS SENSOR NETWORKS FOR ENVIRONMENT MONITORING Emre Ünsal,Mehmet Milli, Yalçın ÇEBİ
Abstract:
Wireless Sensor Network (WSN) is one of the emerging technologies which combine
sensors and tiny embedded devices over a wireless communication medium nowadays. WSNs
gather information from the environment by measuring mechanical, thermal, biological,
chemical, optical or magnetic incidents and transmit the collected information from sensor
nodes to a sink node. However there are many sensors nodes which can be commercially sold
in the markets, these nodes cost high prices and low cost and easy to build up sensor nodes are
needed in low budget applications. The aim of this study is to create a low cost wireless sensor
network for environment monitoring by using Arduino Platform. In accordance to this aim,
Arduino Uno R3 modules are used as wireless sensor network motes. Moreover, to collect data
from nodes and communicate between our sensor nodes, a low cost radio transceiver called
NRF24L01+ is used for the wireless communication. In to monitor environment, four kinds of
sensors (temperature, humidity, carbon monoxide and methane) suitable for Arduino platform
selected. In addition, the collected sensors data is displayed to users with a developed windows
application by using Visual Studio.Net Platform.
PANEL COINTEGRATION ANALYSIS OF INTERNATIONAL TOURISM DEMAND: SAMPLE OF ANTALYA Sabriye GÃœVEN, Mehmet MERT
Abstract:
This paper aimed to find the short-run and long-run relationships between
international tourism demand to Antalya with economic variables such as income (GDP) and
tourism price. Seasonally adjusted quarterly tourist arrivals data were used for 36 countries over
the period 1996Q1 – 2014Q4. Firstly, panel unit root test such as Levin, Lin and Chu (LLC)
(2002) panel unit root test, Maddala and Wu (1999) and Choi (2001) panel unit root test were
used. Then the panel cointegration test based on Kao (1999) panel cointegration test and
Pedroni (1999) panel cointegration test were used to test cointegration relationship among the
variables in the long-run. Also we used a new technique of estimating dynamic heterogeneous
panels, which is developed by Pesaran, Shin and Smith (1999), for the international tourism
demand model. Pooled Mean Group (PMG) estimator is particularly convenient for panels with
large T and N. The PMG estimator allows the intercepts, short-run coefficients and error
variances to differ across groups while constrains the long run coefficients to be identical. The
long-run results of this study show that growth in income (GDP) of the countries concerned has
positive effect on international visitor arrivals to Antalya. However, tourism price was not
found as determinants of international tourism demand in Antalya since the tourism price
parameter is not statistically significant. Also error correction coefficient is negative and
statistically significant. This findings show an existence of long-run relationship.
POSITION OPTIMISATION OF GE DETECTORS IN NUCLEAR RESONANCE FLUORESCENCE (NRF) EXPERIMENT BY USING MONTE CARLO METHOD Hüseyin Ozan Tekin, Iskender Akkurt
Abstract:
Nuclear resonance fluorescence (NRF) supplies good information to study nuclear
structure of isotopes. The main perquisite for excitation to occur, the incoming photon must
have energy equal to one of the excited states of absorbing nucleus. After absorption of the
photon, nucleus will have a transition to the excited state pertaining to photon energy and then
the excited nucleus will decay back to the ground state by emitting a gamma ray that has energy
equal to that excited state. This process is called nuclear resonance fluorescence (NRF). In
this study, we estimated the optimum detector position by considering maximum photondetector
interaction and counted photon amount. It can be concluded that maximum photon
fluence is recorded at the under of the NRF target.
THE HEALTH INFORMATION PROFESSIONAL IN EHEALTH:ETHICAL CONSIDERATIONS FOR AN INTERJURISTICAL SETTING Eike-Henner W. Kluge
Abstract:
Issues such as privacy, security, quality, etc. have received considerable attention in
discussions of eHealth; however little attention has been paid to the fact that eHealth situates
health information professionals (HIPs) in an ethical and legal context that differs importantly
from that of traditional health care. In traditional health care HIP services are pragmatically
useful but not inherently necessary; in eHealth, however, HIPs are not only the interface
between physicians and patients but the instrumental facilitators of eHealth itself. With this,
their professional standing acquires a fiduciary parameter it did not have before, and older
models of the ethics of health information professionals are no longer wholly sufficient to
provide guidance. Matters are complicated further by the inter-jurisdictional parameters of
eHealth, which introduce dimensions that do not exist in the traditional intra-jurisdictional
setting. This paper outlines the issues and sketches a possible approach for addressing the
situation.
THE IMPROVE OF COMBUSTION PROPERTIES ON WOODEN MATERIAL BY USING LIQUED NITROGEN AND BORIC ACID C. Özcan, Ş. Kurt, R. Esen , C. Özcan
Abstract:
In this study, the effects of combustion properties on oriental beech (Fagus orientalis
L.) wood species which treated with liquid nitrogen and impregnated with boric acid. The
dipping method was used for the impregnation and liquid nitrogen process. The combustion
test was performed according to the procedure defined in the ASTM-E 69 standards and during
the test the mass reduction, temperature were determined for each 30 seconds. According to the
test results, it was found that the samples treated with liquid nitrogen retention was increase.
Moreover, sample treated with liquid nitrogen and impregnated with boric acid was more
successfully to combustion retardant than samples only impregnated with boric acid.
THE MISSING PERSONS FINDING SENSITIVE TO MOVEMENTS WITH IMAGE RECOGNITION SYSTEM AND NUMERIC DATA PEOPLE OF LOSS IN TURKEY Emre AVUÇLU, Fatih BAŞÇİFTÇİ
Abstract:
Lost children and adults in our country and in other countries that they are known by
everyone to be a major social problem. According to the study, records from 12 April 2010 to
1 January 2006 Turkey were examined. During this review process, it was observed that a total
of 29.223 recourses for missing children. Of these, 27.741 children are said to be found later.
Children and young people are the future of the country and the main architect of assurance. In
this study, the robot is designed to find missing persons. Thanks to the wireless camera on the
robot, transmits images to the authorities in the outside world. Face images with previously
saved from a computer face pictures of missing persons matched. If there is a match between
the faces, the system automatically provides alerts to the authorities.
USING VIKOR METHOD FOR ANALYZING OF QUALIFICATION LEVELS AND TRANSITION TO EMPLOYMENT OF EUROPEAN UNION AND CANDIDATE COUNTRIES Emre IPEKCI CETIN, H. Hande CETIN
Abstract:
The aim of this study is to evaluate and rank European Union and Candidate
countries with respect to some of the qualification levels and transition to employment
indicators especially which are relevant with women. The data obtained from the “Key Data on
Education in Europe 2012” report. Indicators have selected as follows: 1- proportion of tertiary
education qualifications awarded to women by field of educational/professional training, 2-
proportion of people in employment by age group (25-39; 40-64), 3- tertiary education
graduates in employment of females by occupational category (age 25-64), 4- unemployment
rates of females for the 25-64 age group by educational attainment. VIKOR Method which is
one of the multi-criteria decision making techniques used in this study. By using this method,
alternatives (EU and candidate countries) ranked by comparing the measure of closeness to the
ideal alternative and then the best (compromise) alternative from a set of alternatives in the
presence of conflicting criteria (indicators mentioned above) has selected.
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