1,345 research outputs found
Using Generalizability Theory to Assess the Score Reliability of Communication Skills of Dentistry Students
The goal of this study is to determine the reliability of the performance points of dentistry students regarding communication skills and to examine the scoring reliability by generalizability theory in balanced random and fixed facet (mixed design) data, considering also the interactions of student, rater and duty. The study group of the research consists of the 16 dentistry students who took communication skills elective course in Hacettepe University in 2014-2015 academic year. In the study, the variability sources are taken as student (s), rater (r), occupation (o) and task (t). 16 students are assigned with 16 different duties and whether the students fulfill the duties is rated by 8 raters from two different occupation groups, 4 standard patients and 4 academicians. On these facets using different designs G study has been performed. Within the scope of this study the sxrxt design where all variability sources are crossed; sx(o:r)xt design where the occupation nested on rater as the result of scoring of the students by two different occupation groups as standard patient and academicians; sxaxt and sxspxt facets where rater facet is taken as fixed facet according to occupation groups (sp: Standard Patient, a: Academician) were examined. For each design estimated variance components are discussed separately
Türkçede Bileşiğin Biçimlenişi: Varsayımsal Taban Yaklaşımıyla Yeni bir Sınıflama
Doğal dil ve sözlüksel yapı açısından Chomsky Dilbilgisi(CD)'nin ilk biçimlenişi (Chomsky 1957), biri stratejik diğeri kuramsal nitelikli görülebilecek iki ilgi çekici nokta bulunduruyordu: Stratejik olanı, bu dilbilgisinin karşıtez kaynakları olan gelenekselci ve yapısalcı çalışmalarla biçimbilimde oldukça parlak sonuçlar elde edilmiş olmasına karşın, bu alanın belirgin biçimde zayıf bırakılmasıydı. Kuramsal olanı ise, tümce oluşumundaki (sentence formation) üretimin sözcük oluşumunda (word formation) da bulunabileceğinin göz ardı edilmesiydi
Weak field and slow motion limits in energy-momentum powered gravity
We explore the weak field and slow motion limits, Newtonian and
Post-Newtonian limits, of the energy-momentum powered gravity (EMPG), viz., the
energy-momentum squared gravity (EMSG) of the form
with
and being constants. We have shown that EMPG with and
general relativity (GR) are not distinguishable by local tests, say, the Solar
System tests; as they lead to the same gravitational potential form, PPN
parameters, and geodesics for the test particles. However, within the EMPG
framework, , the mass of an astrophysical object inferred from
astronomical observations such as planetary orbits and deflection of light,
corresponds to the effective mass , being the actual physical mass and
being the modification due to EMPG. Accordingly, while in GR we simply have the
relation , in EMPG we have . Within
the framework of EMPG, if there is information about the values of
pair or from other independent phenomena (from
cosmological observations, structure of the astrophysical object, etc.), then
in principle it is possible to infer not only alone from
astronomical observations, but and separately. For a proper
analysis within EMPG framework, it is necessary to describe the slow motion
condition (also related to the Newtonian limit approximation) by (where and ), whereas this condition leads to in
GR.Comment: 12 pages, no figures and table
Effects of Prolonged Intravenous Flunixin Meglumine in Healthy Dogs
This study was designed to evaluate possible side effects on liver and kidney functions and haematological indices, associated with long-term intravenous (IV) administration of flunixin meglumine in healthy dogs. For this purpose, 12 dogs were divided into 2 equal groups. Group 1 was intravenously given flunixin meglumine at the dose of 1.1 mg/kg/day for 5 days and g-roup 11 received 2.2 mg/kg/day IV for 5 days. Blood samples were withdrawn before treatment (day 0), 2 h post injection on each day of treatment and one day after the last injection for biochemical (glucose, sodium-Na, potassium-K, chloride-Cl, creatinine, urea, alkaline phosphatase-AP, alanine amino transferase-ALT and total protein) and haematological (bleeding time, coagulation time, red blood cell, white blood cell, platelet count, differential leukocyte count, haematocrit and haemoglobin) analyses. Faecal and urine samples were collected on the same days as blood samples for the presence of any abnormalities. The results revealed a significant increase in bleeding (P < 0.001) and coagulation time (P < 0.001) and a decrease in platelet count (P < 0.001) in both groups. There was also a significant increase in the concentration of Na and Cl in group 1 and an elevation in AP (P < 0.00 07 ALT (P < 0.001) and glucose (P < 0.001) in group II. Blood in urine and faeces was also evident in both groups. The results may suggest that the dose of 1.1 mg/kg IV for 5 d does not cause any significant side effects provided that no bleeding disorder exists. and the dose of 2.2 mg/kg IV for 5 d should not exceed 3 d as liver enzymes began to increase significantly afterwards
Equivalence of matter-type modified gravity theories to general relativity with nonminimal matter interaction
We show that gravity models, such as , and , that modify the introduction of
the material source in the usual Einstein-Hilbert action by adding only
matter-related terms to the matter Lagrangian density are
equivalent to general relativity with nonminimal interactions. Through the
redefinition ,
these models are exactly GR, yet the usual material field and its
accompanying partner, viz., the modification field
interact nonminimally. That is,
, where
is the interaction kernel that governs the rate of energy transfer.
We focus on the particular model, the energy-momentum squared gravity, where
the usual material field brings in an accompanying energy-momentum
squared field , along with a sui generis nonminimal
interaction between them. Compared to usual phenomenological nonminimal
interaction models in the literature, EMSF gives rise to more intricate
interaction kernels having covariant formulation even with simple forms of the
function. We elaborate upon EMSF via some different aspects: a DE component
induced from the interaction of sources such as cold dark matter and
relativistic species with their accompanying EMSFs generating interacting DE-DM
models, mimicking noncanonical scalar field, etc., or a Hoyle-type creation
field generating steady-state universe models extended to fluids other than
dust and a mimicker of modified generalized Chaplygin gas. We also demonstrate
the proper calculation of second metric variation of , as
well as in models that contain scalars like and .Comment: 16 pages, no figures and table
Screening in a new modified gravity model
We study a new model of Energy-Momentum Squared Gravity (EMSG), called
Energy-Momentum Log Gravity (EMLG), constructed by the addition of the term
, envisaged
as a correction, to the Einstein-Hilbert action with cosmological constant
. The choice of this modification is made as a specific way of
including new terms in the right-hand side of the Einstein field equations,
resulting in constant effective inertial mass density and, importantly, leading
to an explicit exact solution of the matter energy density in terms of
redshift. We look for viable cosmologies, in particular, an extension of the
standard CDM model. EMLG provides an effective dynamical dark energy
passing below zero at large redshifts, accommodating a mechanism for screening
in this region, in line with suggestions for alleviating some of the
tensions that arise between observational data sets within the standard
CDM model. We present a detailed theoretical investigation of the
model and then constrain the free parameter , a normalisation of
, using the latest observational data. The data does not rule out the
CDM limit of our model (), but prefers slightly negative
values of the EMLG model parameter (), which leads to
the screening of . We also discuss how EMLG relaxes the persistent
tension that appears in the measurements of within the standard
CDM model.Comment: 17 pages, 11 figures, 1 table; matches the version published in EPJ
Efficient FPGA implementation of high-throughput mixed radix multipath delay commutator FFT processor for MIMO-OFDM
This article presents and evaluates pipelined architecture designs for an improved high-frequency Fast Fourier
Transform (FFT) processor implemented on Field Programmable Gate Arrays (FPGA) for Multiple Input Multiple Output
Orthogonal Frequency Division Multiplexing (MIMO-OFDM). The architecture presented is a Mixed-Radix Multipath Delay
Commutator. The presented parallel architecture utilizes fewer hardware resources compared to Radix-2 architecture,
while maintaining simple control and butterfly structures inherent to Radix-2 implementations. The high-frequency
design presented allows enhancing system throughput without requiring additional parallel data paths common in
other current approaches, the presented design can process two and four independent data streams in parallel
and is suitable for scaling to any power of two FFT size N. FPGA implementation of the architecture demonstrated
significant resource efficiency and high-throughput in comparison to relevant current approaches within
literature. The proposed architecture designs were realized with Xilinx System Generator (XSG) and evaluated
on both Virtex-5 and Virtex-7 FPGA devices. Post place and route results demonstrated maximum frequency
values over 400 MHz and 470 MHz for Virtex-5 and Virtex-7 FPGA devices respectively
PHOTOGRAMMETRIC MODEL OPTIMIZATION IN DIGITALIZATION OF ARCHITECTURAL HERITAGE: YEDIKULE FORTRESS
The idea of "digitalization of architectural heritage" has recently gained prominence to represent architectural and historical assets. With all these potentials, this study aims to create optimized models that can be used in serious gaming environments by presenting a method of photogrammetry. As a case study, Yedikule Fortress and its surroundings, which have a multi-layered structure that includes many cultural aspects such as Byzantine, Ottoman, and Republican periods in the historical process, have been studied within the scope of digitizing the architectural heritage to create an optimized model for gaming environments. The study was methodologically constructed in three phases: Photogrammetry, polygon modeling, and low poly/high poly baking process. The fortress and its surroundings are modeled using a high-detail point cloud and a high-poly mesh using aerial photogrammetry. The high-poly model was taken as a reference and transferred into a low-poly model as a mesh map, texture, and light characteristics. This allowed the high poly model to operate more efficiently and effectively in game engines. As a result, the study created a detailed and optimized model for the game engines to produce serious games specific to light and texture data, to be used on devices that support mixed reality (MR) technologies
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