Cumhuriyet Science Journal

<span style="font-size:14px;">Cumhuriyet Science Journal (CSJ) is an official publication of Cumhuriyet University Science Faculty. The high quality research papers  related to the natural sciences and engineering are published in English. This journal have been published online 4 times a year. CSJ is an open access,  free of charge journal and all articles in CSJ have undergone peer review and upon acceptance are immediately and permanently free for everyone to read and download.</span></p>

List of Papers (Total 1,924)

Assesment of outdoor radioactivity and health risk in Adıyaman Province of Turkey

This study was conducted to determine the outdoor absorbed gamma dose levels in and around Adiyaman province in the southeast of Turkey. Measurements were performed using a portable plastic scintillator at 94 different points (Eberline Smart Portable (ESP-2) model). Three readings were made for each measurement and the mean of these three values were determined and the gamma dose...

Effects of Calcined Phosphogypsum on the Geotechnical Parameters of Fine-Grained Soils

In this article, the using of waste materials has been studied such as phosphogypsum in the alteration of fine-grained soils in order to upgrade the geotechnical properties as a construction material. Standard Proctor test, unconfined compressive strength tests and California bearing ratio were carried out on Calcined Phosphogypsum (CPG) stabilized soil samples. It was determined...

Comparison of Data Transfer Performance of BitTorrent Transmission Protocols

BitTorrent, one of the distributed file sharing protocols, is regarded as one of the first examples of decentralized Internet philosophy and is among the important research areas in this context. TCP was initially used as the transport layer protocol in BitTorrent, and the transition to the uTP protocol was made because of the problems of latency and excessive bandwidth...

Investigation of The Gamma Ray Shielding Behaviour of (90-x)TeO2—xMoO3—10ZnO Glass System Using Geant4 Simulation Code and WinXCOM Database

In this study, mass attenuation coefficients (µm), transmission fractions (T), mean free path (MFP) and half value layer (HVL) of the (90-x)TeO2—xMoO3—10ZnO glass system (x=10, 20 and 30 mol%) were calculated at the gamma ray photon energies of 356 keV, 662 keV, 1173 keV and 1330 keV. Shielding parameters of the glass system were calculated from the Monte Carlo simulations...

The Effect of Semi-Circular Protrusions on Cylinder to Flow Structure

In this study; two dimensional, viscous, incompressible, fully developed and turbulent flows on the surface of the cylinder placed in a channel were analyzed using numerical methods. Momentum and continuity equations were solved numerically by ANSYS FLUENT program using finite volume method. The effect of the half cylinder (d = 4.4 mm) placed on the cylinder diameter (D) 44 mm in...

Novel Fluorene and Pyrrole Comprising Copolymers: Effect of Copolymer Feed Ratio on Electrochromic and Electrochemical Properties

Herein, synthesis of two homopolymers namely, poly-2,2′-(9,9-dioctyl-9h-fluorene-2,7-diyl)bisthiophene (PBT), poly-pyrrole-3-carboxylic acid (PP3CA) and fluorene and pyrrole comprising five novel copolymers (CoP1, CoP2, CoP3, CoP4, CoP5) were electrochemically synthesized. Each electrolytic solution was prepared with different monomer feed ratios to investigate the effect of...

The Determination of Some Qualities Parameters and Use of Strip Loin Beef (M. Longissimus dorsi) Powder in Bread Enrichment

In this study, the protein content of the bread, that is also known as rich in carbohydrate content, is enriched by using strip loin beef (M. longissimus dorsi) powder as the additive. In order to meet the daily protein needs of individuals, bread was prepared with the addition of certain amounts (3%, 5%, 7%, and 10%) of beef minced powder to the wheat flour. The protein content...

Recurrence Relations for the Moments of Minimum Order Statistics from Exponential Distribution

In this paper, certain recurrence relations for the moments of minimum order statistics of a random sample of size n arising from exponential distribution are obtained. The usefulness of these relations in evaluating the moments of exponential minimum order statistics is also discussed.

Antifungal Activity of Some Benzimidazole-Hydrazones

In the present work, 15 4-(1-(prop-2-in-1-yl)-1 H -benzoimidazole-2-yl)- N '-(substitutedmethylene)benzohydrazide derivatives ( 4a - 4o ) were re-synthesized to evaluate their antifungal activity. Structure identification of synthesized compounds was elucidated by 1 H-NMR, 13 C-NMR, and HRMS spectroscopic methods. Inhibitory potential of the re-synthesized compounds was...

The Comparison of Primary, Secondary and Tertiary Amine Ligands on Palladium (II) Complex Ion on Thermo-Physical, Chemical Reactivity, and Biological Properties: A DFT Study

The Palladium is considered as the catalyst for coupling reaction and useful metal in industry. The thermo-physical, chemical reactivity and biological interaction are considered the most expected parameters for use in any area of the chemical industry, the pharmaceutical industry, and academia. The palladium (II) complex ion with different amine ligands are considered under...

Hermite-Hadamard Type Inequalities For Two Times Differentiable Arithmetic-Harmonically Convex Functions

In this work, by using both an integral identity and the Hölder, the power-mean integral inequalities it is established several new inequalities for two times differentiable arithmetic-harmonically-convex function. Also, a few applications are given for some means of real numbers.

The Oxidation of 4-(4-Formylphenoxy) Phthalonitrile to 4-(4-Carboxylphenoxy) Phthalonitrile at Ambient Conditions

The substituted phthalonitriles have been used to prepare soluble phthalocyanine species in recent years. One of the most used phthalonitrile derivatives for the target product is 4-nitrophthalonitrile. In this study 4-(4-formylphenoxy) phthalonitrile was prepared as the substituted phthalonitrile derivative by the nucleophilic substitution reaction of para-hydroxybenzaldehyde...

Comparison of Remote Sensing Classification Techniques for Water Body Detection: A Case Study in Atikhisar Dam Lake (Çanakkale)

Water resources management is one of the most important issues of today. Satellite remote sensing have been successfully used to detect the presence of water bodies. In this study, four remote sensing methods: (1) normalized difference water index (NDWI), (2) support vector machine (SVM), (3) geographic object-based image analysis (GEOBIA) and (4) NDWI supported GEOBIA...

Linear And Nonlinear Intersubband Optical Absorptions In Multiple Quantum Wells Under The External Fields

In this study, the effects of the external fields (electric and tilted magnetic fields) and well parameters on the optical absorption coefficients in GaAs/GaAlAs multiple (five) quantum wells under the applied electric and tilted magnetic fields has been investigated theoretically. Firstly, the energy eigenvalues and eigen functions of an electron confined in multiple quantum...

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

In this research, the concentrations of natural (226Ra, 232Th and 40K) and anthropogenic (137Cs) radionuclides were measured in sediment samples collected from the Borçka Dam Lake using a high purity germanium detector (HPGe). The activity values ranged from 4.79-21.46, 9.36–20.65, 238.01–721.26 and 0.79–6.81 Bq kg-1 for 226Ra, 232Th, 40K and 137Cs respectively. The average 226Ra...

Double Actions of Groups

In this work, we present the concept of double action of a group on a set as a new concept in literature, which opens up the way for applying rich amount of algebraic topological facts and methods in the algebraic topology. Besides of this, we give some expository examples of this new concept. We also express the definition of a double action via permutations as similar to the...

Determination of the annual effective dose distribution due to cosmic ray exposure of the Eastern Black Sea Region, Turkey

In this study, annual effective dose rate distribution due to cosmic radiation, which constitutes an important part of natural radiation, was mapped in spatial pixels for three provinces in the Eastern Black Sea region (Artvin, Rize and Trabzon). Cosmic ray-induced annual effective dose calculations were performed based on latitude and altitude changes with EXPACS, an excel-based...

A Mechanism of Eddy Generation in A Single Lid-Driven T-Shaped Cavity

The two-dimensional (2D) steady, incompressible, Stokes flow is considered in a T-shaped cavity which has the upper-lid moving in horizontal directions. A Galerkin finite element method is used to investigate a new eddy generation and flow bifurcation. The flow in a cavity is controlled by two parameters and which are associated with the heights of the T-shaped domain. By varying...

Investigation of Cytotoxic Effects of Inula Viscosa Extract

Inula viscosa is a type of Asteraceae family, which widely used for medicinal plant to treatment of different diseases. Inula viscosa contains many biological compounds, such as monoterpenes, sesquiterpenes, diterpenes, flavonoids. Our study aimed to investigate the cytotoxic effects of Inula viscosa extract on MCF-7 (breast carcinoma), C6 (glioblostoma cancer), MG63 (bone...

Shell Model Calculations for Proton-rich Zn Isotopes via New Generated Effective Interaction by Artificial Neural Networks

In this study, the artificial neural network method has been employed for the generation of the new two-body matrix elements which is used for fpg shell nuclei. For this purpose, jj44b interaction Hamiltonian has been considered as a source. After the generation of the new Hamiltonian, both, original and new generated, are tested on proton-rich Zn isotopes. According to the...

A Theorem on Absolute Summability of Infinite Series

In this paper, a theorem on absolute summability of infinite series is obtained by taking almost increasing sequence instead of positive non-decreasing sequence. Also, some results of absolute summability are given.

Growth of Cu2ZnSnS4 Thin Films Using Moderate Annealing Temperature and Short Dwell Time

In this study CZTS thin films were fabricated by a two-stage process that sputter deposition of metallic Cu, Zn, and Sn on Mo coated glass substrates and annealing process at 500 °C using various short dwell times (4, 8, and 12 min) using Rapid Thermal Processing (RTP) approach. The X-ray diffraction (XRD), Raman spectroscopy, Scanning Electron Microscopy (SEM), Energy Dispersive...

Ecotoxic Effects of Cerium Oxide Nanoparticles on Bacteria

In this study, the ecotoxic effects of cerium oxide nanoparticles ( CeO 2 NPs) on both gram positive Bacillus subtilis and gram negative Escherichia coli bacteria were investigated. CeO 2 NPs were prepared in synthetic water solutions having different water contents (low, median and high ionic strength and conductivity, pH 5.5 and 6.5). Bacteria were exposed to CeO 2 NP solutions...

A Finite Element Investigation of the Superelevated Horizontal Curve

Stress-strain analyses are studied under the bottom of the pavement layer, and pavement life values are calculated depending on the cross-section variation because of the superelevation in horizontal curves. For this purpose, 1st principal total mechanical strain values are analyzed with the superelevation values changing between 0-8 (%) and the different positions of wheel...

Evaluation of NCEP/NCAR Reanalysis Precipitable Water Data Comparing to Radiosonde Observations for Turkey

Precipitable Water (PW) data of NCEP/NCAR Reanalysis Project (NNRP) model is evaluated by comparing to radiosonde data obtained from 8 locations of Turkey for the years between 2015 and 2017. Two methods are utilized to extract NNRP data for the observation locations. In the first method, the nearest NNRP grid point to the radiosonde locations is selected. The second method is...