Digital Commons Network^™

Identification Of Differences Between Information Communicated By Text Messaging And Voice Message On Feedback, Nicholas Simpson

Online Theses and Dissertations

This study examined the modifying effect of communication via voice or text on a cellular phone as it relates to the effects of feedback on future performance, self-efficacy, and perceived face validity. Previous literature has established an effect of positive feedback enhancing future performance and self-efficacy, and negative feedback decreasing future performance and self-efficacy, but no research currently exists on how this effect can be modified by method of delivery over cellular phone. This study examined the effect of positive and negative feedback by having participants complete self-efficacy, face validity, and performance measures. The participants then received positive or negative …

The Perception Of School Board Members And Their Role In Improving College And Career Readiness, Sara Elaine Farris

Online Theses and Dissertations

The national focus of graduating America's students ready for college and a career has heightened the importance of and the need for school board members to rethink their purpose on what and how they spend their time. Improving the college and career readiness of K-12 students will need school boards that are willing to receive the training to ensure that district leadership and schools are using the appropriate strategies that will impact college and career readiness.

School boards have always recognized student achievement as central to their role in governing public schools; however, the impact they actually have on promoting …

Kentucky Speech-Language Pathologists' Confidence And Education In Providing Services To Spanish-English Bilingual Children In The Public Schools, Leah Katherine Cooley

Online Theses and Dissertations

The American Speech-Language-Hearing Association (ASHA) has mandated that all speech-language pathologists (SLPs) competently assess and serve children from diverse cultural backgrounds (ASHA, 2010). In Kentucky, there has been a 121% increase in the Hispanic population in the last ten years (O'Neill, 2011). As the population of Kentucky becomes more diverse, it is essential that SLPs have cultural competence and confidence in serving clients with culturally-linguistically diverse backgrounds. The purpose of this study was to compare the amount of multicultural pre- service training and continuing education Kentucky SLPs have received to the amount received by the SLPs surveyed in the larger …

Exploring Military Service As An Alternative Sanction: Evidence From Inmates' Perspectives, Travis Wade Milburn

Online Theses and Dissertations

A large body of research exists that examines the punitiveness of prison compared to a wide variety of alternative sanctions. Generally, this research finds that there are numerous demographic and contextual differences in the way that people experience the punitiveness of prison. In this paper, I expand that research by using data from over 900 inmates to examine whether they view military service as more punitive than incarceration.

The research suggests females, Blacks, and those who have not had prior military service are more likely to desire imprisonment as opposed to military service. However, Whites and veterans appear to embrace …

Deuterium Tracer Studies Of The Mechanism Of Cobalt Catalyzed Fischer-Tropsch Synthesis, Chunfen Jin

Online Theses and Dissertations

Since the Fischer-Tropsch (FT) catalytic polymerization reaction has been discovered in 1920s, many kinds of possible mechanisms have been reported. However, there is still debate because there is a lacking of experimental evidence to discriminate the validity of each mechanism. To define the mechanism of Fischer-Tropsch-Synthesis (FTS), we must define the C-C formation pathways as well as the structure of initiator species in the process, and finally provide an explanation in mechanistic detail as to how branched hydrocarbon compounds are formed in the reaction sequence.

In order to understand the cobalt catalyzed mechanism of FTS, we conducted H2/D2 switching and …

The Impact Of International Students On American Students And Faculty At An Appalachian University, My Mustapha Jourdini

Online Theses and Dissertations

This study examined the effects of exposure to international students on American student and faculty perceptions at a regional Appalachian University. A revised and improved version of Jaleh Shabahang's (1993) International Education Opinionnaire was used to survey American students and faculty regarding their perceptions of the educational and cultural impact of international students. The revised instrument also measured American student and faculty perceptions of five ethnic groups of international students. Three independent samples t-tests were administered to compare the views between two American groups: students or faculty in international-related academic departments (IRs) and non-international-related academic departments (NIRs). The first test …

Perceived Levels Of Confidence And Knowledge Of Autism Between Paraprofessionals In Kentucky Schools And Parents Of Children With Autism, Laura Nichole Baker

Online Theses and Dissertations

A total of 173 special education paraprofessionals and 49 parents of children with autism responded to a survey investigating perceived levels of confidence and knowledge of autism. The purpose of this study was to determine if paraprofessionals assigned to children with autism in Kentucky public schools were adequately trained, skilled and knowledgeable in their provision of services to children with autism. Parents scored significantly higher in their amount of autism knowledge when compared to paraprofessionals. Paraprofessionals were found to be significantly more confident in their ability to provide instructional support to children diagnosed with autism than were the parents. Results …

Ambient Ionization Mass Spectrometry Analysis Pertaining To Biofuel Process Development, Sushma Dendukuri

Online Theses and Dissertations

Mass spectrometry (MS) has undergone a revolution with the introduction of a new group of desorption/ionization (DI) techniques known collectively as Ambient Ionization mass spectrometry. Ambient ionization mass spectrometry allows for direct analysis of analytes and typically requires little or no sample preparation. Specifically, Direct Analysis in Real Time (DART) has developed rapidly and allowed investigations to occur with the analysis of biomass after various pretreatments to determine the pretreatment biomass degradation efficiency. The degradation of the initial biomass structure is a very important step before other chemical treatments can occur to generate needed sugars. Since generated sugars aid in …

Synthesis Of Novel Ionic Liquid Tagged Porphryin Media Designed For The Oxidation Of Lignin, Joseph Hugh Franklin Baker

Online Theses and Dissertations

The ever growing need for a viable renewable fuel source has led to this thesis project; the biomimetic lignin degradation by means of a homogeneous oxidative catalyst in corresponding ionic liquids. Lignin comprises nearly a third of lignocellulosic biomass and is cross-linked to both cellulose and hemicellulose. Current utilization methods of lignin do not generate the full value of the polymer, because they do not yield many of the valuable feed stock chemicals it is comprised of. To improve the value of the biomass as a whole and create a viable economy for the US's transition to biofuels, better utilization …

Symmetry And The Order Of Events In Time. A Proposed Identity Of Negative Mass With Antimatter, Randy Wayne

Turkish Journal of Physics

In another paper in this series, we developed a symmetrical theory of mass which describes how systems of positive mass and negative mass will respond to an input of thermal energy. A system composed of positive mass or negative mass will respond to an input of thermal energy in opposite ways. For example, if a system composed of positive mass expands in response to radiation from a hot body, a system composed of negative mass will contract. Likewise, if the system composed of positive mass contracts when brought in communication with a cold body, a system composed of negative mass …

Thermodynamics Of Liquid Alkali Metals Using Pseudopotential Perturbation Scheme, Jagendra Kamalsinh Baria, Ashvinkumar Ramaniklal Jani

Turkish Journal of Physics

Recently proposed model potential of Baria and Jani is used with the exchange and correlation effect of Sarkar et al. to calculate internal energy (Enthalpy), Entropy and Helmholtz free energy of liquid Na, K, Rb and Cs at various temperatures with the variational approach. The parameter of the potential is determined with the standard zero pressure condition. The structure factor derived by Percus-Yevick solution for hard sphere fluids which is characterized by hard sphere diameter \sigma is used. A good agreement between theoretical investigations and experimental findings has confirmed the ability of the model potential to the liquid alkali metals.

Te Surface Waves In Dielectric Slab Sandwiched Between Lhm Slabs, Ass'ad I. Ass'ad, Hassan S. Ashour

Turkish Journal of Physics

In this work, the dispersion relation for TE surface waves has been derived for a slab waveguide constructed from a dielectric material slab sandwiched between two thick layers of left-handed material (LHM). The dispersion relation and the power flow were numerically solved for a given set of parameters: the structural factor, dielectric slab thickness, and the operating frequency on the effective refractive index and power flow. We found that the wave effective refractive index decreases with thickness increase as well as increase in frequency. We found that the effective refractive index increases slightly with increase of structural factor. Also, the …

Prediction Of Some Mechanical And Vibrational Properties Of Gax (X = P, As, Sb) Semiconductor Compounds, Anil Ratilal Jivani, Ashvinkumar Ramniklal Jani

Turkish Journal of Physics

The static elastic constants (C_{11}, C_{12} and C_{44}), pressure derivative of elastic constants, pressure derivative of bulk modulus, propagation velocities of longitudinal and transverse waves in [100], [110] and [111] directions and Young modulus are investigated through computations using the higher-order perturbation theory based on pseudopotential formalism, in which we have applied our own proposed model potential for GaP, GaAs and GaSb semiconductor compounds. In the present calculations, two local-field correction functions are employed to consider exchange and correlation effects. The numerical values of the aforesaid properties are found to be sensitive to the selection of the local-field correction function …

Determination Of Barrier Height Temperature Coefficient By Norde's Method In Ideal Co/N-Gaas Schottky Contacts, Abdulmeci̇t Turut

Turkish Journal of Physics

We have formed the ideal Co/n-GaAs Schottky barrier diodes (SBDs) by magnetron DC sputtering. The experimental current-voltage data of the Co/n-GaAs SBD are almost independent of the sample temperature and quite well obey the thermionic emission model from 100 K to 320 K. We have showed that the temperature coefficient of the barrier height can be determined using Norde's method instead of the temperature-dependent capacitance-voltage measurements or the flat-band barrier height values because the thermionic emission current dominates in the ideal SBDs. We have obtained a barrier height temperature coefficient value of \alpha = 0.41 meV/K for Co/n-GaAs SBDs used …

Structure And Electrical Properties Of Lanthanum Doped Bi_2sr_2ca_{2-X}La_Xcu_3o_{10+ \Delta} Superconductor, Kareem Jasim

Turkish Journal of Physics

In this work we studied the effect of La-doping on phase purity, crystal structure and electrical resistivity of Bi_2Sr_2Ca_2Cu_3O_{10+\delta} superconductor, synthesized by usual solid state reaction method. The X-ray florescence (XRF) show the stoichiometry of samples and X-ray diffraction (XRD) analysis showed the change of structure from orthorhombic to tetragonal by increasing La doping. It was found that the change of lanthanum concentrations of all our samples produce a change in the oxygen content, the ratio of lattice parameters c/a and mass density \rho_m. Electrical resistivity, using the four-probe technique, was used to find the critical temperature T_c and to …

Effect Of Zinc Incorporation On The Density Of Defect States In A-Se_{85}Te_{15} Glassy Alloy, Shikha Shukla, Santosh Kumar

Turkish Journal of Physics

Present work incorporates the study of d.c. conductivity measurements at high electric fields in vacuum evaporated thin films of Se_{85-x}Te_{15}Zn_x (x = 0, 2, 4, 6 and 10) glassy alloys. Current-Voltage (I-V) characteristics have been measured at various fixed temperatures. In these samples, at low electric fields, ohmic behavior is observed. However, at high electric fields (E \sim 10^4 V/cm), non ohmic behavior is observed. An analysis of the experimental data confirms the presence of space charge limited conduction (SCLC) in the glassy materials studied in the present case. From the fitting of the data to the theory of SCLC, …

The Element Contents In Chickpeas Grown Under Organic And Conventional Farming Regimes Using Wdxrf Analysis For Human Nutrition And Health, Uğur Akbaba, Yusuf Şahi̇n, Hasan Türkez

Turkish Journal of Physics

A comparative study on elemental composition of various chickpea (Cicer arientînum L) samples was conducted by using wavelength dispersive X-ray fluorescence (WDXRF). 22 elements, Al, Ca, Cu, Fe, Mn, Ni, P, S, Sr, Zn, Br, Cl, K, Mg, Na, Ba, Rb, Si, Au, Cr, La and Sn, were determined in chickpea samples (n = 10) grown under organic and conventional farming regimes. Results obtained from each group were analyzed statistically using the SPSS statistic program. It was observed that the concentration and peak intensity values of Ca, Fe, P, Cl, K, Mg and Na elements were higher in the chickpea …

Branching Of The W(H_4) Polytopes And Their Dual Polytopes Under The Coxeter Groups W(A_4) And W(H_3) Represented By Quaternions, Mehmet Koca, Nazi̇fe Koca, Mudhahir Al-Ajmi

Turkish Journal of Physics

4-dimensional H_4 polytopes and their dual polytopes have been constructed as the orbits of the Coxeter-Weyl group W(H_4), where the group elements and the vertices of the polytopes are represented by quaternions. Projection of an arbitrary W(H_4) orbit into three dimensions is made preserving the icosahedral subgroup W(H_3) and the tetrahedral subgroup W(A_3). The latter follows a branching under the Coxeter group W(A_4). The dual polytopes of the semi-regular and quasi-regular H_4 polytopes have been constructed.

Neutron Cross-Sections For ^{55}Mn In The Energy Range From 0.2 To 22 Mev, Abul Khaer Mohammad Rezaur Rahman

Turkish Journal of Physics

Neutron total and differential elastic scattering cross-sections for ^{55}Mn nucleus was calculated from different global spherical optical potential (SOP) sets for different neutron energies ranging from 0.2 MeV to 22 MeV using the well known computer program SCAT-2 on an IBM PC-AT. In addition, the angular distributions of elastically scattered neutrons at different neutron energies were calculated. The results were compared with those of the experimental data obtained from the EXFOR data file of NEA data bank. The best-fit potential parameter was thereby selected. It was observed that the best fit to the experimental values of the total cross-sections are …

\Delta (E2/M1) And X(E0/E2) Mixing Ratios In ^{134}Ba By Means Of Ibm-2, Abdul Ridha Hussain Subber, Flih Hussain Al-Khudair

Turkish Journal of Physics

The ^{134}Ba isotope (Z = 56) lies in the transitional region closer to the vibrational range of nuclei. Energy levels B(E2), B(M1) and the mixing ratios \delta (E2/M1) and X(E0/E2) for selected transitions were calculated in the framework of the proton-neutron interacting boson model (IBM-2). All results were compared with experimental data. Some experimental X(E0/E2) ratios were calculated from available experimental data. Majorana parameters were found to have a great effect on the calculated energy levels of the 2_3^+ and 2_4^+, which indicate that both of them have mixed symmetry properties.

Gamma Irradiation Effect On The Optical Properties And Refractive Index Dispersion Of Dye Doped Polystyrene Films, Tariq J. Alwan

Turkish Journal of Physics

In this work, we have studied the effect of the gamma irradiation on the optical properties and optical constants of Polystyrene doped by methylene blue (mb) with thickness in the range 0.11 + 5 mm. The samples have been investigated via transmittance and reflectance spectra, and characterized in the wavelength range 300-900 nm. The optical band gap E_g was determined while the optical absorption spectra showed that the absorption mechanism is an indirect allowed transition, which found that optical energy gap E_g decreases after irradiation. The optical constants (refractive index, extinction coefficient, and real and imaginary parts of the dielectric …

Hydrogen Implantation Effects On The Electrical And Optical Properties Of Inse Thin Films, Atef Fayez Qasrawi, Khaled Faisal Ilaiwi, Antonio Polimeni

Turkish Journal of Physics

The effects of hydrogen ion implantation on the structural, electrical and optical properties of amorphous InSe thin films have been investigated. X-ray diffraction analysis revealed no change in the structure of the films. An implantation of 7.3 x 10^{18} ions/cm^2 decreased the electrical conductivity by three orders of magnitude at 300 K. Similarly, the conductivity activation energy, which was calculated in the temperature range of 300-420 K, decreased from 210 to 78 meV by H-ion implantation. The optical measurements showed that the direct allowed transitions energy band gap of amorphous InSe films has decreased from 1.50 to 0.97 eV by …

Full Polar Optical Phonon States And Dispersive Spectra Of A Wurtzite Gan/Aln Rectangular Quantum Wire, Li Zhang

Turkish Journal of Physics

Within the framework of the dielectric continuum model and Loudon's uniaxial crystal model, the full polar optical phonon modes including the quasi-confined (QC) modes, the propagating (PR) modes, the half-space (HS) modes, and the interface optical (IO) modes in a quasi-one-dimensional (Q1D) wurtzite rectangular quantum wire (QWR) structure are deduced and analyzed. The analytical phonon states, their dispersion equations and polar polarization eigenvectors are derived. Numerical calculation of dispersive spectra for these modes is performed on a wurtzite GaN/AlN rectangular QWR. The behavior of the QC mode reducing to the IO mode is observed clearly in the dispersive curves of …

Heat And Mass Transfer In Hartmann Flow With Soret Effect In Presence Of A Constant Heat Source, Nazibuddin Ahmed

Turkish Journal of Physics

An exact solution of the laminar flow of an incompressible, viscous, electrically conducting fluid between two infinite, parallel, horizontal isothermal stationary walls in the presence of a transverse magnetic field and constant heat source, taking into account the induced magnetic field, induced electric field, Soret effect and dissipating heat is presented. The expressions for the non-dimensional velocity field, temperature field, concentration field, induced magnetic field, induced electric field, skin frictions at the walls and the co-efficients of the rates of heat and mass transfer at the walls in terms of the Nusselt and Sherwood numbers are obtained. The effects of …

Space-Time Scaling Invariant Traveling Wave Solutions Of Some Nonlinear Fractional Equations, Tianlan He, Hui Fang

Turkish Journal of Physics

In this paper, a homogeneous principle is proposed to seek the space-time scaling invariant traveling wave solutions expressed by power functions for some fractional differential equations. Applying this principle to generalized fractional Benjamin-Ono equations and generalized fractional ZakharovKuznetsov equations, the traveling wave solutions expressed by power functions have been obtained under some parameter conditions.

Near-Resonant Diurnal Reactions: A Physical Model Applicable To Origin Of Life Processes, Eddwin Budding, Cüneyt Aki, Osman Demi̇rcan, Bülent Gündüz, Güngör Gündüz, Mehmet Emi̇n Özel

Turkish Journal of Physics

We adopt that the large residual chemical potential energy (CPE) among reagents of the biosphere constitutes the key physical problem posed by life. We associate the formation of this CPE with the near-resonant behaviour of a two-stage `A-B' molecular process that behaves as a self-sustaining parametric oscillator. Under suitable conditions, such an oscillator generates CPE when forced by a periodic (daily) insolation. The net growth factor required to explain the current mean excess of biospheric CPE is \sim 5 x 10^{-12} d^{-1}. This aligns with the mean exponential coefficient of secular oxygen generation in the terrestrial atmosphere. It is also …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

2012-2013 Graduate Catalog, Morehead State University

Morehead State Catalog Archive

2012-2013 graduate catalog for Morehead State University.

Effect Of Motion On The Adc Quantification Accuracy Of Whole-Body Dwibs, A. Stone, Jacinta Browne, Brian Lennon, James Meaney, Andrew Fagan

Articles

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Diffusion-weighted whole-body imaging with background body signal subtraction was introduced as a qualitative approach to detecting metastases in the body. A liver-mimicking phantom with embedded tumours that could be moved to replicate respiratory motion was developed to assess its ability to accurately quantify ADC values.

RESULTS:

Mean tumour ADC values were unaltered by the motion; however, a significant (p < 0.05) increase in the spread of ADC values was measured, even for relatively large tumours.

CONCLUSIONS:

These findings may be of significance in cancer therapy monitoring where subtle changes in ADC histograms may reveal changes in tumour heterogeneity.

New Non-Toxic Holographic Photopolymer Material, Dervil Cody, Izabela Naydenova, Emilia Mihaylova

Articles

There is an increasing need for environmentally friendly holographic recording materials which can be produced in bulk with little risk to the health of workers in manufacturing. This is why the development of non-toxic photopolymer materials is crucial, and has attracted attention in recent years. Composition and preliminary characterization of a new non-toxic photopolymer material are presented. It operates well at a range of spatial frequencies, and achieves diffraction efficiencies and refractive index modulation comparable to the known acrylamide-based photopolymers.