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USING SOFTWARE DEFINED RADIOS TO MAKE A TRANSCEIVER AND TO USE IN 5G BASE STATION APPLICATIONS
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Thirdhand Smoke Beliefs of Parents
No full textParents are responsible for protecting their children from the harmful effects of thirdhand smoke (THS). The purpose of this descriptive study was to examine parents’ beliefs about third-hand smoke. Data were collected using the “Introductory Information Form” and the “Turkish Version of the Beliefs About Third-Hand Smoke Scale.” The sample consisted of 895 parents living in Ankara. Data were analyzed using Mann–Whitney U and Kruskal–Wallis-H tests. Eighty-two percent of the participants did not know the concept of THS. The mean scale score of the participants was 4.01 ± 0.82. Scale score means were higher for participants who banned smoking in their homes and cars (p <.05). The results show that most parents do not know the concept of THS. Parents’ awareness should be increased to protect children from THS exposure
Clinicopathological Correlations in Medication-Related Osteonecrosis of the Jaw: A Retrospective Histopathological Study
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Modeling the asymmetric thermo-mechanical behavior and failure of gray cast irons: An experimental-numerical study with separate Johnson-Cook parameters
No full textIn this study, the asymmetric (different tensile and compressive behavior) thermo-mechanical behavior and damage of gray cast irons (EN-GJL-200, EN-GJL-250, EN-GJL-300), which are widely used in industrial applications, under different strain rates and temperatures were investigated by a combination of experimental and numerical methods. The mechanical response of the materials was characterized by quasi-static tensile and compression tests at room temperature and elevated temperatures up to 700 degrees C, Split Hopkinson Compression Bar (SHPB) tests for high strain rates (up to similar to 3600 s(-1)) and tensile tests with specimens of different notch radii to analyze the damage behavior. Based on the experimental data obtained, the Johnson-Cook (JC) material (A, B, n, C, m) and damage (D1-D5) model parameters were calibrated separately for both loading cases in order to capture the apparent asymmetric behavior of gray cast irons under tensile and compression loading. These separate parameter sets were integrated into ANSYS Autodyn finite element software through FORTRAN-based user-defined subroutines and virtual tensile, compression and SHPB tests were performed. Comparing the numerical simulation results with the experimental data, it was observed that the developed asymmetric modeling approach, in particular, represents the thermo-mechanical behavior and damage of the material with high accuracy (deviations in the range of 2-8 % for maximum stress and elongation at break values). This study provides reliable and decoupled JC parameter sets for modeling the asymmetric thermo-mechanical behavior and damage of gray cast irons, allowing more realistic simulations to predict the performance of these materials in demanding engineering applications
Effects of Intrathecal, Intraperitoneal, and Rectal Ozone Application Routes on Kidney Tissue in Rats with Spinal Cord Ischemia–Reperfusion Injury
No full textBackground: Spinal cord ischemia–reperfusion injury (IRI) is a serious complication that can develop after spinal and thoracoabdominal surgeries or spinal cord traumas. This study aimed to investigate the effects of medical ozone on kidney tissue when administered via different routes in a spinal cord IRI model in rats. Methods: Thirty rats were divided into five groups: control (C), ischemia–reperfusion (IR), IR-rectal ozone (IRRO), IR-intrathecal ozone (IRITO), and IR-intraperitoneal (i.p.) ozone (IRIPO). An ozone–oxygen mixture was administered 30 min before midline laparotomy: 1 mg/kg (50 µg/mL) by rectal insufflation to the IRRO group, 20 µL (20 µg/mL) intrathecally to the IRITO group, and 0.7 µg/kg (50 µg/mL) intraperitoneally to the IRIPO group. The spinal cord IR model was established. The left kidney was then harvested for histopathological and biochemical analyses. Results: Malondialdehyde levels and paraoxonase-1 enzyme activities were significantly lower in the IRRO, IRITO, and IRIPO groups than in the IR group. Catalase (CAT) enzyme activity was found to be significantly higher in the IRITO and IRIPO groups than in the IR group. Glomerular vacuolization, vascular vacuolization and hypertrophy, and Bowman space dilation were significantly higher in the IRITO and IRIPO groups than in the IR group. Tubular dilation and lymphocyte infiltration were found to be significantly lower in the IRITO, IRIPO, and IRRO groups than in the IR group. Tubular hyaline cylinders were found to be significantly lower in the IRITO group than in the IR and IRRO groups. Conclusion: Ozone can regulate the negative effects of IRI by regulating cellular oxidative stress mechanisms. This effect was achieved most effectively on kidney tissue in the spinal cord IRI model through intrathecal and intraperitoneal administration. The use of ozone can be a highly beneficial supportive treatment to protect kidney tissue from the negative effects of IRI, an area of study in which preventive treatments should be at the forefront
Ultrastructures of aedeagus and spermatheca of two species of the nominate subgenus Chaetocnema (Chaetocnema) Stephens, 1831 (Chrysomelidae: Galerucinae: Alticini) by Scanning Electron Microscope
No full textProposition of two new subgenera of the genus Stenhomalus White (Cerambycidae: Cerambycinae)
No full textThe paper presents a taxonomic evaluation on subgeneric arrangement of thegenus Stenhomalus White. As a result, Stenhomalus (Bicoloripennus) subgen. nov. andStenhomalus (Unicoloripennus) subgen. nov. are described and presented with somespecies that were previously placed to the nominate subgenus, Stenhomalus (s.str.) White.</p