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Copyright of Etkileşim: Academic Journal of Uskudar University Faculty of Communication is the property of Etkilesim and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A series of compounds with the general formula RE1.90Y0.10Zr2O7 (where RE includes Eu, Sm and Y includes La, Sm, Eu) were synthesized using a solid‐state reaction method. These compounds were analyzed through differential thermal analysis (DTA), thermogravimetric analysis (TG), X‐ray powder diffraction (XRD), and scanning electron microscopy (SEM). Additionally, their dielectric constant, loss tangent, piezoelectric charge constant, and Curie temperature were measured using an LCR meter, d33 meter, and TG/DTA. X‐ray diffraction results indicated that all samples crystallize in a cubic pyrochlore structure. Photoluminescence studies revealed that Eu3+ ions predominantly contribute to the emission, whether as activators or co‐activators. Among the phosphors, Eu1.90La0.10Zr2O7 exhibited a significantly longer afterglow compared to Sm1.90Eu0.10Zr2O7 and Eu1.90Sm0.10Zr2O7. Conversely, Sm1.90Eu0.10Zr2O7 demonstrated luminescence intensity that was 20 times greater than that of Eu1.90La0.10Zr2O7 and Eu1.90Sm0.10Zr2O7. Furthermore, all samples with characteristic Eu3+ emissions also exhibited piezoelectric properties. Curie temperature (Tc) of Eu1.90La0.10Zr2O7, Sm1.90Eu0.10Zr2O7, and Eu1.90Sm0.10Zr2O7 are 770°C, 830°C, and 845°C, respectively. Therefore, Sm3+ ion improves piezoelectric properties and Curie temperature when doping into the Eu2Zr2O7 host crystal. [ABSTRACT FROM AUTHOR]

EPDM (ethylene propylene diene monomer) is a type of synthetic rubber. The products of rubber have great importance in every part of life. EPDM rubber has high tensile strength, high tension, toughness, and is weather resistant. Therefore, EPDM (ethylene-propylene-diene rubber) is widely used in many fields. The aim of this study is to examine the effect of accelerator type on mechanical properties and vulcanization characteristics of EPDM rubber. We used the accelerators; thiazole, sulfonamides, dithiocarbamate, thiuram, and guanidine groups. The results show that the fastest cure time and the best tensile strength are achieved with dithiocarbamates for EPDM rubber. [ABSTRACT FROM AUTHOR]

Pathogenic, biallelic variants in SORD were identified in 2020 as a novel cause for autosomal-recessive Charcot-Marie-Tooth disease (CMT) type 2, an inherited neuropathy. SORD codes for the enzyme sorbitol dehydrogenase. Loss of this enzyme's activity leads to an increase of sorbitol in serum. We retrospectively screened 166 patients with axonal neuropathy (predominantly CMT type 2, but including intermediate form of CMT and distal hereditary motor neuropathy (dHMN)) without identified genetic etiology for SORD mutations at a single large German neuromuscular center. Clinical and electrophysiology exam findings were analyzed for genotype–phenotype correlation. Five patients of the total cohort of 166 patients harbored pathogenic variants in SORD (3%). The homozygous frameshift variant c.757delG (p.Ala253Glnfs*27) was the most common (4/5). One additional case carried this variant on one allele only and an additional pathogenic missense variant c.458C > A (p.Ala153Asp) on the other allele. Age of onset ranged from early infancy to mid-twenties, and phenotypes comprised axonal CMT (4) and dHMN (1). Our findings strengthen the importance of screening for pathogenic variants in SORD, especially in patients with genetically unconfirmed axonal neuropathy, especially CMT type 2 and dHMN. [ABSTRACT FROM AUTHOR]

In this study, Dy3+ doped and Ho3+ co-doped materials synthesized by the sol-gel method at different temperatures were investigated. The structural and optical properties were characterized by an x-ray powder diffract meter, thermal analysis system, scanning electron microscopy, Raman spectroscopy, FT-IR, UV-vis spectroscopy, and photoluminescence spectrophotometer. The photocatalytic performance, crucially contingent on the sintering temperature, was systematically evaluated using malachite green and methylene blue as model pollutants. Remarkably, the highest efficiency, registering an impressive 90%, was achieved for methylene blue when sintered at 1000 °C. For malachite green, a substantial efficiency of 62% was attained at a sintering temperature of 800 °C. The corresponding optical band gap, a pivotal parameter influencing photocatalytic activity, was determined to be 2.43 eV. Under the near-UV excitation at 318 nm, the CeO2:0.1Dy0.1Ho phosphor emitted photoluminescence with dominating emissions at 475 nm (blue), 559 nm (green) and 663 nm (red) corresponding to 4F9/2→6H15/2 (blue) transition of Dy3+ ions, 5F4, 5S2→5I8 (green) and 5F5→5I8 (red) transitions of Ho3+ ions, respectively. [ABSTRACT FROM AUTHOR]

In this paper, we present a method for numerical computing of some characteristic kinds of non‐null curves lying on a non‐degenerate surface in Minkowski space 피13. Namely, we obtain the system of the first‐order ordinary differential equations that correspond to general helix, relatively normal‐slant helix, and isophote curve and integrate it under chosen initial conditions by applying the ode45 function of MATLAB and Runge‐Kutta method. Depending on the kind of curve, we assume that parametric equation of the surface, an axis vector, value of the real cosine or hyperbolic cosine of the corresponding pseudo angle between axis vector and Darboux frame's vector, normal curvature, and geodesic torsion of the curve are given. Finally, we provide the related examples of numerically computed characteristic curves. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Architectural Sciences & Applications (JASA) is the property of Journal of Architectural Sciences & Applications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this article, photoluminescence (PL) and thermoluminescence (TL) properties of ZrO2, ZrO2:Dy3+, ZrO2:Dy3+–Gd3+, ZrO2:Dy3+–Yb3+, ZrO2:Dy3+–Er3+, and ZrO2:Dy3+–Sm3+ phosphors synthesized by the Pechini method were investigated. The crystal structure, thermal properties, morphology, PL and TL properties were investigated using X‐ray powder diffraction (XRD), differential thermal analysis/thermogravimetric analysis (DTA/TGA), scanning electron microscopy (SEM), PL and TL, respectively. The room temperature emission bands corresponding to 4F9/2 → 6HJ (J = 9/2, 11/2, 13/2 and 15/2) transitions of Dy3+ ions were measured. The phosphors were analysed using Tm–TSTOP, variable dose, and computerized glow curve fitting methods. Reusability, dose–response, and fading characteristics were investigated. The phosphors have a natural TL emission that vanished by heating treatment. Moreover, new peaks with similar properties to the natural emissions were observed after high‐dose irradiation and long‐term fading experiments. The glow curves of the phosphors have 13 individual peaks and many low‐ and high‐temperature satellite peaks. The origin of the peaks is ZrO2 host material and doping with rare‐earth ions (Gd3+, Dy3+, Yb3+, Er3+ and Sm3+) does not lead to a new glow peak. The dopants cause drastic changes in individual peak intensities of ZrO2.The initial fading rates of all the phosphors are relatively fast, but they slow down as time goes on. [ABSTRACT FROM AUTHOR]

The silicate-type and Eu3+-activated Sr3SiO5 and Mg3SiO5 were prepared through the high temperature solid state reaction method under an open atmosphere. DTA/TG analysis was conducted to obtain information about the thermal behaviors of the mixed reactants. Using the DTA/TG results, the sintering process was achieved and the phase properties were characterized by X-ray diffraction (XRD). The effects of the same activator (Eu3+) and co-dopant (Dy3+) on the photoluminescence (PL) properties of the host lattices were investigated by using a photoluminescence spectrometer.