TOJSAT - Volume 7 - Issue 2 - April 2017

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ANALYSES OF ABA RESPONSES GENES IN ARABIDOPSIS THALIANA sos5 MUTANT UNDER NaCI STRESS

Tuba ACET

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Abscisic acid (ABA) is an important phytohormone that regulates a lot of
physiological, biochemical and molecular processes during plants life and response stress
conditions. In this paper, Arabidopsis thaliana salt overly sensitive (sos5) mutant which known
hyper sensitive to NaCI stress was used to investigate ABA regulation. Because of this, ABA
depended genes determined by q-RT PCR method under 2h. 100 mM NaCI stress. Findings
indicated that RD29A, RD 29B and RD22 which ABA dependent gene expressions were highly
lower than Col-gl (wild type); however ERD1 which ABA in depended gene expression was
higher than WT. Based on these results, we suggest that defect of ABA responses gene
regulation might be responsible for hypersensitivity to Arabidopsis sos5 mutant under salt
stress.

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CALCULUS WRITING PROMPTS

Jason D. Johnson, Carla A. Rudder

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In this paper, a study was designed to explore mathematics majors engaged in Calculus
writing prompts. The paper also provides mathematics instructors benefits for instruction and
students for the importance of writing to make sense of mathematics. An analysis for both the
derivative and integral writing prompts was completed. The results indicate that mathematics
majors were able to solve derivative and integral problems, however, some were unable to articulate
their mathematical thinking and the thinking of others.

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CMAS BASED CERAMICS PRODUCTION USING DOLOMITE, KAOLIN AND ZIRCONIA

Nil Toplan, H. Özkan Toplan

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CMAS (CaO-MgO-Al2O3-SiO2) based ceramics were fabricated by using dolomite,
kaoline and zirconia as raw materials. Natural calcia and magnesia containing material
(dolomite) and silica and alümina containing kaolin were used to develop a new ceramic of
CMAS system. The calculated amounts of oxides for the indicated compositions were ball
milled for 3 h using distilled water as the milling media. After drying, the powders pressed in
cylindrical mould under the pressure of 300 MPa. The samples were fired in an electric furnace
with a heating rate of 10ºC.minute-1 at 900ºC to 1200ºC for periods of 1, 3, and 5 hours. Then,
the fired samples were cooled to room temperature in the furnace. Microstructure of produced
CMAS ceramics were investigated and their phases analysis was determined. The effects of
ZrO2 oxide on microstructure and phase structure of CMAS ceramics were also investigated.

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COMPARISON OF DIFFERENT TEMPORAL DATA WAREHOUSES APPROACHES

Georgia GARANI, Canan Eren ATAY

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Data warehouses are mainly used for business data analysis by querying and
reporting huge collections of data. For the management of historical data, temporal data
warehouses have been developed. Two current approaches for dealing with temporal data in
data warehouses are compared in this paper, Object-Relational Temporal Data Warehouse (ORTDW)
model and Starnest Temporal Data Warehouse (S-TDW) model. The O-RTDW model
enables data values to be associated with facts, and specifies when facts are valid, thereby
providing a complete history of the data values and their changes. To accurately and completely
store all data changes, the valid time should be kept at the attribute level. On the other hand, the
S-TDW model uses the starnest schema for the modeling of time-varying data in dimensions.
The temporal starnest schema expresses naturally hierarchy levels by the clustering of data in
nested tables, with result the description of aggregation levels for a dimension in a natural way.
By comparing these two temporal data warehouses models, object-oriented and nesting
approaches are also compared and evaluated.

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COMPARISONS OF POLYPROPYLENE COMPOSITES: THE EFFECT OF COUPLING AGENT ON MECHANICAL PROPERTIES

Umit HUNER

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The aim of this work is to compare the glass fiber (GF)/polypropylene (PP) and black
rice husk (BRH)/black rice husk ash (BRHA)/polypropylene (PP) composites on mechanical
properties. Tensile, flexural and falling weight impact test was conducted to investigate the
effect of filler content and coupling agent (MAPP) on the mechanical properties of the
BRH/BRHA/PP composites. Using a coupling agent, the mechanical properties of glass fiber
reinforced material is intended to reach. By incorporating up to 10% (by weight) fillers, the
tensile strength of GF/PP increased by 21%, BRH/PP and BRHA/PP were decreased by 20%
and 10%, respectively, compare to neat polypropylene. Using MAPP provided to enhance the
tensile strength of BRH/PP and BRHA/PP composites. And also the effect of water absorption
on GF/BRH/BRHA was investigated. Results showed that increasing BRH and BRHA
concentration and increasing water contact time greatly increase water absorption.

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DETERMINATION OF CONTROL LIMITS FOR ASH CONTENT OF CLEAN COARSE COAL PROCESSED BY HEAVY MEDIUM DRUM

Adem TAŞDEMİR

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In this research, control limits of the ash content of clean coarse coal product (+18
mm) produced by a heavy medium drum at a coal preparation plant in Turkey was investigated.
The importance of data normality and data independence to detect correct control limits of
process control chart were shown for ash content of coal product. One year ash data obtained
in 2010 which had non-normal distribution and autocorrelated were found to obey lognormal
distribution well and ARIMA(1,0,1) model was the best model to remove autocorrelation.
Assuming normal distribution and independence, the control limits of ash content were
determined as UCL=16.97, CL=12.85, LCL=8.74 with original ash data. When considering
only data non-normality and ignoring autocorrelation, the ash control limits were detected as
UCL=17.49, CL=12.72, LCL=9.25. On the other hand, the control limits of ash content were
implemented as UCL=19.56, CL=12.72, LCL=8.27 if we consider both lognormal distribution
and autocorrelation by ARIMA(1,0,1) model. In addition, number of out-of-control points for
ARIMA residual chart considering both data non-normality and auto-correlation were less than
those obtained by control chart using original data.

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FACTORS PROMOTING STAPHYLOCOCCUS AUERUS DISINFECTION BY TiO2, SiO2 AND AG NANOPARTICLES

Merve ÖZKALELİ, Ayça ERDEM

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The use of conventional disinfection products and methods in drinking water
treatment continue to fail in many undeveloped countries. Those applications need to be reevaluated
and innovative approaches to be considered to enhance the reliability and robustness
of disinfection while avoiding disinfection byproducts (DBPs) formation. The rapid growth in
nanotechnology has prompted significant interest in the environmental applications of
nanoparticles (NPs). In order to understand the antibacterial effect of NPs, Staphylococcus
aureus treated with TiO2, SiO2 and Ag NPs were studied under ambient conditions. The results
indicated that the most bactericidal effect with specific die-off rates of 0,003 L/mg (TiO2 NPs)
and 0,002 L/mg (Ag NPs) were defined in the absence and the presence of photoactivation,
respectively. Moreover, as ionic strength of the test media increases from 10 to 100 mM, NPNP
and NP-bacteria interactions were negatively affected.

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FRICTION WELDING OF AL 7075 ALLOY AND 316 L STAINLESS STEEL

Osman TORUN

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Friction welding of Al 7075-T6 alloy and 316 L stainless steel carried out for
different times under a constant friction and forging pressure, a forging time, rotational speeds.
Microstructures of the welds were examined by scanning electron microscopy and optical
microscopy. The results showed that all of the welded samples were free of any or crack along
the weld interface. The chemical compositions of the interface of the welded joints were
determined by using energy dispersive spectroscopy. 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 210, 7 MPa.

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HIGH RISE BUILDINGS IN HISTORIC CITIES

Elif Süyük Makaklı, Serpil Özker

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High rise building was the most remarkable new building type to emerge in the late
19th century which has entirely changed the scale, appearance, concept and image of cities with
its great visual impact. With advanced technologies the skylines of the cities dominated by high
rise buildings all over the world in 20th century. In the 21st century it can be expected that
more and more innovative high rise buildings will be built, utilizing the cutting-edge techniques
also in historic cities with World Heritage Sites. High rise buildings’ relationship with their
context is more problematic than any other structure, the subject of what they add and what
they take away to the city is quite controversial. Introducing a new building in a historic city
has a dramatic impact on traditional urbanistic structure. In this study high rise buildings in
historic cities with World Heritage Sites, their development, and impact on the city and the
urban image are examined by selected examples from different historic cities. The current
approaches for designing high rise buildings in a historical setting will be also examined.

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IMPLEMENTATION OF BERNSEN’S LOCALLY ADAPTIVE BINARIZATION METHOD FOR GRAY SCALE IMAGES

Can EYUPOGLU

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In digital image processing, binarization (two-level thresholding) is a commonly
used technique for image segmentation. It is the process of converting a gray scale image to a
binary image. Furthermore, binarization methods are divided into two groups as global
binarization and locally adaptive binarization. A number of binarization techniques have been
proposed over the years. Bernsen’s method is one of locally adaptive binarization methods
developed for image segmentation. In this study, Bernsen’s locally adaptive binarization
method is implemented and then tested for different gray scale images.

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IMPORTANCE OF SKETCHING IN THE DESIGN PROCESS AND EDUCATION

Serpil Özker, Elif Süyük Makaklı

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Design education adopts different education models that changes constantly due to differences
among disciplines. Education models can be varied with different training techniques. The
design approaches introduced during the design process, which forms the basis of design
education, gain meaning through sketching “with free-hand drawing” which is an effective
communication tool for the profession. Sketching ensures fast development and introduction of
opinions, serving as an active transmitter of visual expression. The computer technologies that
are advancing rapidly today turns the traditional design, the “free-hand technique”, into an
element with a conceptual impact on the design process. The study aims to discuss the “process
of sketching” behind the design factor in the architecture and interior architecture education in
Turkey and to analyse the method of sketching as well as its application styles, design,
presentation, education, process and results, discussing the importance of sketching process in
the education. Finally, the sketching process is associated with the concept of design,
emphasizing that it is essential for the architecture and interior architecture design education
and it is a skill that must be enhanced through education.

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INVESTIGATION OF CONCRETE GRAVITY DAM BEHAVIOUR CONSIDERING DAM–FOUNDATION–RESERVOIR INTERACTION

Muhammet KARABULUT, Murat Emre KARTAL, Murat CAVUSLI, Seda COSKAN, Oguzhan DURSUN

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Ground motion effects on a concrete gravity (CG) dam in the earthquake zone should
be taken into account for design conditions. Boyabat CG dam constructed in Sinop, Turkey, is
selected as an application. This study presents two-dimensional earthquake response of Boyabat
CG dam including friction between dam and foundation. The two-dimensional finite element
model of Boyabat CG dam is obtained using ANSYS finite element software. The unfavorable
section of the dam is selected for two-dimensional numerical analyses. The contact-target
element pairs are used in the dam–foundation–reservoir interaction. In this case, friction contact
is considered in the numerical solutions. Empty and full reservoir cases are also considered in
these solutions. The hydrodynamic pressure of the reservoir water is modeled with two
dimensional fluid finite elements based on the Lagrangian approach. In the earthquake analyses,
the finite element model has fixed boundary conditions. According to linear dynamic analyses,
maximum horizontal displacements and maximum principle stress components are presented
by dam height in the largest section. These results are evaluated considering empty and full
reservoir conditions.

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INVESTIGATION OF SINGLE AND MULTI-LAYER NONWOVENS THERMAL INSULATION AND AIR PERMEABILITY BEHAVIORS

Seyda EYUPOGLU, Nigar MERDAN, Habip DAYIOGLU, Mehmet KILINC

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Textile materials have potential importance for an alternative use on thermal
insulation as their porous and fibrous structure. In this study, thermal insulation and air
permeability of multi-layer nonwovens with 120, 180 and 500 g/m2 forming single and double
layer were investigated. Moreover, thermal insulation and air permeability of triple-layer and
four-layer nonwovens with the weight of 180 g/m2 were analyzed. It was found that the single
layer nonwovens give better thermal insulation properties than the multi-layer nonwovens.
Furthermore, the increase of weight of nonwovens causes to increase in thermal conductivity
coefficients. According to the air permeability measurements, the results show that the air
permeability of samples decreases with the increase of weight of samples and number of layer.

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MINIMIZING THE ENERGY OF THE VELOCITY VECTOR FIELD OF CURVE IN R3

Ayşe ALTIN

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The present paper considers all the unit-speed curve segments between two fixed
points p and q in R3. It obtain a condition for the critical curve of the problem of minimizing
the energy of the velocity vector field among the family of all curves from p to q. It show that
the condition can be expressed in terms of the curvature functions.

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MODELLING APPROACHES OF PERFORMANCE EVALUATION OF HIGH QoS OF KERBEROS SERVER WITH DYNAMICALLY RENEWING KEYS UNDER PSEUDO CONDITIONS

Yoney K. EVER, Eser GEMIKONAKLI, Kamil DIMILILER

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In literature, some existing studies suggested different proposed approaches that
interrupt temporary link/server access. Also, in order to find implications in terms of
performance degradation, analytical models are used, as well as failures of the servers. Unlike
previous studies, the failures of the servers are considered together with link/server
interruptions for renewals. In this study, the authors mainly focused to develop a new
framework for the existing authentication protocols by considering them in an unusual fashion.
The performance degradations that may be caused by service interruptions are discussed with
a new framework to model the interactions between the network and the authentication servers.

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STRATEGIC DECISION SUPPORT SYSTEM BASED HYBRID MODELS FOR COLLEGES ENROLLMENT CAPACITY PLANNING: DESIGN & IMPLEMENTATION

Said Ali El-Quliti, Abdul Hamid Mohamed Ragab, Reda Abdelaal, Ali Wagdy Mohamed, Abdulfattah Suliman Mashat, Amin Yousef Noaman, Abdulrahman Helal Altalhi

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This paper proposes a Hybrid Strategic Decision Support System (H-SDSS)
for colleges’ enrollment capacity planning. Three hybrid subsystems are combined for
executing the task of decision making processes. The system includes students’ track
specified model, colleges’ enrollment model and students’ capacity forecast model.
Data mining knowledge based rules and goal programming based methods are used
for building the system. This H-SDSS is expected to help university decision makers
for solving problems related to strategic decisions for enhancing university students’
admission and enrollment capacity planning to satisfy future of higher educational
demands as well as labor market needs.

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WEAR PERFORMANCE OF HDPE/ ZnO – SiO2 - CaCO3 – Mg(OH)2 NANO-FILLER POLYMER COMPOSITES

Sezgin Ersoy, Münir Taşdemir

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Polymer technology is developing products for diverse needs.
However, the expected properties of materials are rapidly increasing. Many new
products have been developed using nanotechnology in the development of
polymer production. These products can be illustrating change properties as
physical, structural, morphological, electrical and mechanical properties when
compared to the microstructure. Detection of these changes can be determined by
an examination of these materials. In this study, the investigation of the effect of
high-intensity polyethylene is filled by zinc oxide, magnesium hydroxide, calcium
carbonate and silicon dioxide. The experiments show that It varies according to the
tribological properties of nano contribution rates. High density polyethylene with zinc
oxide, magnesium hydroxide, calcium carbonate and silicon dioxide have been
mixed at % 5, %10, %15 and % 20 proportion. After the mixing activity the
dehydrated materials have been changed into granule.

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