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Clinical behavior of chromophobe renal cell carcinoma is less aggressive than that of clear cell renal cell carcinoma, independent of Fuhrman grade or tumor size
Chromophobe renal cell carcinoma (chRCC) is the third most common subtype of RCC, after clear cell (ccRCC) and papillary RCC. Its lower incidence and frequent exclusion from clinical trials might be why chRCC characteristics have not been extensively studied. The aim of our study was to examine tumor characteristics and long-term prognosis of chRCC compared to ccRCC. We collected 4,210 evaluabl...


Second order PDEs with Dirichlet white noise boundary conditions
In this paper, we study inhomogeneous Dirichlet boundary problems associated to the Poisson and heat equations on bounded and unbounded domains with smooth boundary and random boundary data. The main novelty of this work is a convenient framework for the analysis of equations excited by the white in time and/or space noise on the boundary. Our approach allows us to show the existence and unique...
A Nonmonotone Hybrid Method of Conjugate Gradient and Lanczos-type for Solving Nonlinear Systems
In this paper, we construct a new algorithm which combines the conjugate gradient and Lanczos methods for solving nonlinear systems. The iterative direction can be obtained by solving a quadratic model via conjugate gradient and Lanczos methods. Using the backtracking line search, we will find an acceptable trial step size along this direction which makes the objective function nonmonotonically...


Chemical diffusion and oxygen exchange of LaNi0.4Fe0.6O3−δ ceramics
Oxygen surface exchange and oxygen chemical diffusion coefficients of LaNi0.4Fe0.6O3−δ ceramics are determined via conductivity relaxation method after stepwise change of temperature in the range of 700–950 °C in air and Ar/O2 gas flow at oxygen partial pressures ((p_{O_2 } )) of 4 Pa, 18 Pa, 37 Pa, 47 Pa and 59 Pa. The highest conductivity (about 160 S·cm−1) is found at 950 °C in air...
Preparation, crystallization, microstructure and dielectric properties of lead bismuth titanate borosilicate glass ceramics
Various bulk and transparent glasses were prepared by rapid melt quenching technique in the glass system 55[(PbxBi1−x)TiO3]-44[2SiO2B2O3]-La2O3 (x = 0–0.7). The X-ray diffraction (XRD) studies of the glass samples confirmed the amorphous nature. The differential thermal analyses (DTA) were carried out from room temperature to 900 °C with a heating rate of 10 °C/min. The DTA patterns of th...


Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C
Geopolymer composites containing woven cotton fabric (0–8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 °C, 400 °C, 600 °C, 800 °C and 1000 °C. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 °C, the composit...
Evaluation of SiC-porcelain ceramics as the material for monolithic catalyst supports
Mechanical and thermal properties of SiC-porcelain ceramics were studied in the wide SiC content range of 0–95%. Microstructure evolution, shrinkage at sintering, porosity, mechanical strength, elastic modulus, coefficient of thermal expansion (CTE) and thermal conductivity were studied depending on SiC content. The optimal sintering temperature was 1200 °C, and the maximum mechanical streng...

Relaxor behavior and Raman spectra of CuO-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 ferroelectric ceramics
In this work, Raman spectra and dielectricity-temperature dependence measurements were used to investigate the B-site order degree in CuO-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 ferroelectric ceramics. The measurement results indicated a typical relaxor characteristic for all samples. With the increasing of CuO doping content, the B-site order degree increased first and then decreased. However, the frequ...
Role of phonon drag and carrier diffusion in thermoelectric power of polycrystalline La0.97Na0.03MnO3 manganites
We develop a theoretical model for quantitative analysis of temperature-dependent thermoelectric power of monovalent (Na) doped La0.97Na0.03MnO3 manganites. In the ferromagnetic regime, we have evaluated the phonon thermoelectric power by incorporating the scattering of phonons with impurities, grain boundaries, charge carriers and phonons. In doing so, we use the Mott expression to compute the...

Frequency dependent electrical properties of Na2Pb2R2W2Ti4Nb4O
In the present research work, frequency dependent electrical properties of tungsten bronze structured compounds Na2Pb2R2W2Ti4Nb4O30 (R = Nd, Sm) are reported. X-ray diffraction (XRD) study of polycrystalline ceramic samples confirms the formation of compounds with orthorhombic structure. Analysis of frequency dependent electrical data in the framework of modulus and conductivity formalism sugge...
Normalized evaluation of thermal shock resistance for ceramic materials
A normalized method for evaluation of thermal shock resistance for ceramic materials was proposed. A thermal shock resistance index (TSRI), Г, in the range of 1 to 100, was introduced, based on a normalized formula obtained directly by a simple testing process of determining the changes in flexural strength before and after thermal shock cycles. Alumina ceramic was chosen as the model material...

Functional and Nonfunctional Quality in Cloud-Based Collaborative Writing: An Empirical Investigation
Research problem: Collaborative writing has dramatically changed with the use of cloud-based tools, such as Google Docs. System quality—both functional (i.e., what services the system provides) and nonfunctional quality (i.e., how well the system provides the services)—influences user satisfaction with these tools. Research question: Do functional and nonfunctional quality influen...
Making the Pitch: Examining Dialogue and Revisions in Entrepreneurs' Pitch Decks
Research problem: The question: How Korean entrepreneurs in an entrepreneurship program revised their slide decks for their presentations (“pitches”) in response to professional communication genres representing feedback from potential stakeholders in their target markets is examined. Research questions: As entrepreneurs learn to pitch ideas to unfamiliar markets, how do they revi...
Iron-containing mixed-oxide composites as oxygen carriers for Chemical Looping with Oxygen Uncoupling (CLOU)
Chemical Looping with Oxygen Uncoupling (CLOU) offers a potentially effective approach for converting solid carbonaceous fuels with inherent carbon dioxide capture. It utilizes oxygen carriers that allow facile and reversible exchange of their lattice oxygen with external environment under varying oxygen partial pressures. The varying and often tunable thermodynamic properties of mixed oxides o...
WikiNect: image schemata as a basis of gestural writing for kinetic museum wikis
This paper provides a theoretical assessment of gestures in the context of authoring image-related hypertexts by example of the museum information system WikiNect. To this end, a first implementation of gestural writing based on image schemata is provided (Lakoff in Women, fire, and dangerous things: what categories reveal about the mind. University of Chicago Press, Chicago, 1987). Gestural w...