OALib Journal期刊

ISSN: 2333-9721



匹配条件: “ARSLAN” ,找到相关结果约656条。
A Unified Equation of Interactions  [PDF]
Hasan Arslan
Open Journal of Microphysics (OJM) , 2011, DOI: 10.4236/ojm.2011.12005
Abstract: The aim of this study is to combine four fundamental forces in a single equation. Dirac equation is written by putting the Yukawa potential as a representation of the strong and gravitational forces. The ordinary terms seen in the Dirac Equation are treated as the representations of the electromagnetic forces. The Lagrangian of the weak local interaction of the charged particles is converted to the energy representation according to the virial theorem and is put in the equation. Thus four fundamental forces are combined in a unique equation.
The Distances in the Stable Systems Due to the Virial Theorem  [PDF]
Hasan Arslan
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.44094

The virial theorem is written by using the canonical equations of motion in classical mechanics. A moving particle with an initial speed in an n-particle system is considered. The distance of the moving particle from the origin of the system to the final position is derived as a function of the kinetic energy of the particle. It is thought that the considered particle would not collide with other particles in the system. The relation between the final and initial distance of the particle from the origin of the system is given by a single equation.

The Dirac Equation with the Scattered Electron Including Extra Potential Energy Comes from the Virial Theorem  [PDF]
Hasan Arslan
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.44078

The scattering of electron by a photon is a well-known reaction in physics. In this study, the change in the electron’s energy after the scattering is taken into account. The previous works are searched. In order to take into account this change in the electron’s energy in the equation of motion of the electron, the Dirac equation is used with the virial theorem. The scattered electron kinetic energy which is given to the electron by the loss in photon’s energy is related to the potential energy of the electron by the virial theorem which states that the potential energy is two times of the kinetic energy in minus sign. A first time application of the virial theorem on a scattered electron by a photon is included to the Dirac equation.

Some Possible Particles Decays from pp Collisions at LHC Experiment  [PDF]
Hasan Arslan
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.511103

Some of the possible decays of pp collisions at LHC experiment are considered. The vector bosons mediating in the electroweak interactions and right-handed leptons except neutrinos are assumed to be the most resultant particles from the pp collisions. Neutrinos and anti-neutrinos will be observed when one-double electron charged vector bosons are the resultant particles. The charge conservation is thought to be the dominant factor of these decays. The amplitude transitions for Feynman diagram of these decays are written.

Investigating Catalase and Carbonic Anhydrase Enzyme Activities and Levels of Certain Trace Elements and Heavy Metals in Patients with Primary and Metastatic Hepatic Carcinoma  [PDF]
Ayse Arslan, Halit Demir, Harun Arslan
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.48163

Hepatocellular carcinoma (HCC) is among most common terminal cancer types in the world. Primary etiological factors include cirrhosis, hepatitis, aflatoxin and alcohol. The current study was conducted to determine cytosolic erythrocyte carbonic anhydrase and catalase enzyme activities and levels of some trace elements. For this purpose, 40 patients with primary and metastatic hepatic cancer and 29 healthy volunteers enrolled to the study. Catalase and carbonic anhydrase enzyme activities and serum trace element levels were measured in patient and control groups. In the current study, serum copper, magnesium, manganese and zinc levels were lower in the primary and metastatic hepatic cancer group in comparison with the control group (P < 0.05). In contrast, serum iron, cobalt, cadmium and lead levels were higher in the patient relative to the control group (P < 0.05). In comparison with the control group, the catalase level was lower in primary and metastatic cancer group, while the carbonic anhydrase level was higher in the cancer group (P < 0.05). Changes in levels of trace elements and anti-oxidant enzymes may be the factors which influence the development and progression of liver cancer. The carbonic anhydrase enzyme can be a useful indicator in the diagnosis of cancer. However, this issue warrants further investigation.

The Path to Information Technology Business Value: Case of Turkey  [PDF]
Birgul Arslan, Meltem Ozturan
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.21007
Abstract: This study seeks to shed light upon the strategic value of information technology (IT) investments. Previous literature suggests that IT investments per se are not sufficient for improving firm performance. Drawing from the resource-based view, it is hypothesized in this study that IT investments can deliver higher firm performance if they are 1) combined with complementary assets, 2) leveraged to build capabilities and 3) used to support organizational core competencies. Based on the data collected, the findings show that IT support for core competencies has a significant positive effect on firm performance and the research model explains more than fifty percent variation of this performance. The study contributes to the literature by developing a comprehensive resource-based model of IT value, which takes IT, human and complementary resources into account and combines them with IT-related capabilities. The study also attempts to fill the gap of measurement by proposing a new measurement for IT stock of company which accounts for both the availability and the level of information technologies held by the company. Lastly, the study provides evidence from an under researched country, Turkey.
The Adomian Decomposition Method and the Differential Transform Method for Numerical Solution of Multi-Pantograph Delay Differential Equations  [PDF]
Musa Cakir, Derya Arslan
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.68126
Abstract: In this paper, the Adomian Decomposition Method (ADM) and the Differential Transform Method (DTM) are applied to solve the multi-pantograph delay equations. The sufficient conditions are given to assure the convergence of these methods. Several examples are presented to demonstrate the efficiency and reliability of the ADM and the DTM; numerical results are discussed, compared with exact solution. The results of the ADM and the DTM show its better performance than others. These methods give the desired accurate results only in a few terms and in a series form of the solution. The approach is simple and effective. These methods are used to solve many linear and nonlinear problems and reduce the size of computational work.
Evaluation of Lipid Peroxidation and Some Antioxidant Activities in Patients with Primary and Metastatic Liver Cancer  [PDF]
Ayse Arslan, Halit Demir, M. Fatih Ozbay, Harun Arslan
Journal of Cancer Therapy (JCT) , 2014, DOI: 10.4236/jct.2014.52024

Abstract: HCC is the 6th most common cancer in the world. The main risk factors associated with HCC are hepatitis B (HBV) and hepatitis C viral infections and other factors that play a role in HCC development, include aflatoxin B1 (AFB1) cigarette smoking, and chronic inflammation. The aim of this study is to investigate lipid peroxidation and some antioxidant enzyme activities in patients with primary and metastatic liver cancer. For this purpose, 25 primary and metastatic liver cancer patients and 15 healthy controls were included in the study. In blood samples taken from the patient and control groups, the main product of lipid peroxidation MDA and SOD, GSH, GPx activity levels were examined. In result of study serum MDA level is higher and erythrocyte SOD, GSH, and GPx activities were found to be significantly lower in the patient group compared with the control group (p < 0.05). As a result, liver cancer is associated with oxidative stress and antioxidant system weakens, which is an important indicator of oxidative stress, lipid peroxidation levels increased and promotes the tissue damage.

A Grain Flow Model to Simulate Grain Yield Sensor Response
Selcuk Arslan
Sensors , 2008, DOI: 10.3390/s8020952
Abstract: The objective of this study was to develop a flow model for grain combinesbased on the laboratory and field response of an impact based grain flow sensor. The grainflow model developed in this study is of first order with constant coefficients. A computercode was written to solve the model and to simulate the response of a yield sensor whoseresponse had been determined previously for various types of flow rate inputs both in fieldand laboratory experiments. The computer program for the simulation can alsocompensate for the time delay. The simulation results of the theoretical model suited wellto the experimental data and showed that the model effectively shows the input-outputrelationship of grain flow through a grain combine. This model could be used for periodicflow signals acquired from grain yield sensors. It was concluded that the model postulatedin this study could be further developed to determine the grain yield entering the combineusing the outlet flow rate measured by a yield sensor.
An Amperometric Biosensor for Uric Acid Determination Prepared From Uricase Immobilized in Polyaniline-Polypyrrole Film
Fatma Arslan
Sensors , 2008, DOI: 10.3390/s8095492
Abstract: A new amperometric uric acid biosensor was developed by immobilizing uricase by a glutaraldehyde crosslinking procedure on polyaniline-polypyrrole (pani-ppy) composite film on the surface of a platinum electrode. Determination of uric acid was performed by the oxidation of enzymatically generated H2O2 at 0.4 V vs. Ag/AgCl. The linear working range of the biosensor was 2.5×10-6 – 8.5×10-5 M and the response time was about 70 s. The effects of pH, temperature were investigated and optimum parameters were found to be 9.0, 55 oC, respectively. The stability and reproducibility of the enzyme electrode have been also studied.

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