Electromotive Force Generated in All Materials under Temperature Difference

In this research, we investigate the thermoelectric effects of general materials. The results of this showed that an electromotive force was generated under a temperature difference between two points in materials. As no material has infinite electric resistance, an electromotive force is expected to be generated under a temperature difference in all materials. In conclusion, the thermoelectric effect generates an electromotive force. This electromotive force causes an electric current to flow, thereby generating a magnetic field.This magnetic field generates the Earth's magnetic field, triboelectricity, sunspots, and kinetic energy of celestial bodies.This temperature differential electromotive force also generates lightning and creates an ionosphere that reflects radio waves.

Electromotive Force Generated in All Materials under Temperature Difference

In this research, we investigate the thermoelectric effects of general materials. The results of this showed that an electromotive force was generated under a temperature difference between two points in materials. As no material has infinite electric resistance, an electromotive force is expected to be generated under a temperature difference in all materials. In conclusion, the thermoelectric effect generates an electromotive force. This electromotive force causes an electric current to flow, thereby generating a magnetic field. This magnetic field generates the Earth's magnetic field, triboelectricity, sunspots, and kinetic energy of celestial bodies. This temperature differential electromotive force also generates lightning and creates an ionosphere that reflects radio waves.

Synthesis of Nanocrystalline TiO2 by the Extraction-Pyrolytic Method and its Phase Transformation in the Presence of Gadolinium

Due to its to its optical, thermal, photocatalytic and electrophysical properties, nanocrystalline titanium oxide (TiO2) is widely used in various fields. In the present work, a series of pure and Gd-modified (0.5, 5, 50 mol%) TiO2 nanocrystalline powders were prepared by a novel synthesis approach – extraction-pyrolytic method (EPM). Metal containing extracts on the basis of valeric acid were used as precursors. Thermal behavior of produced individual and mixed precursors were investigated by thermogravimetric analysis (TGA) and high temperature differential scanning colometry (HDSC). Phase composition of pure and Gd-modified TiO2 powders were studied as a function of pyrolysis temperature (450o -850°C ) and gadolinium content by X-ray diffraction (XRD) method. Photocatalytic activity of produced powders was studied by photocatalytic degradation of methylene blue (MB) under UV/VIS light irradiation.

Experimental Investigation of Dry and Cryogenic Friction Stir Welding of AA7075 Aluminium Alloy

An attempt has been made to investigate dry and cryogenic friction stir welding of AA 7075 aluminium alloy, which is predominantly availed in aerospace and defence component industries. These industries avail friction stir welding for joining two nonferrous materials, and minimal deviations and maximum strength are the preliminary and long time goal. A cryogenic friction stir welding setup was developed to conduct the joining of two aluminium alloy pipes. An increase of 0.76–42.93% and 3.79–31.24% in microhardness and tensile strength, respectively, is ascertained in cryogenic friction stir welding in correlation to dry friction stir welding of aluminium alloys. TOPSIS evaluation for the experimental run indicated tool profile stepped type, pipe rotation speed of 1000 rpm, welding speed of 50 mm/min, and axial force of 8 kN as close to unity ideal solution for dry and cryogenic friction stir welding of AA 7075 aluminium alloys. The friction stir-welded component under the cryogenic environment showcased drop in temperature, curtailed surface roughness, and fine grain structure owing to reduction in temperature differential occurring at the weld zone. A curtailment of 50.84% is ascertained in the roughness value for cryogenic friction stir welding in correlation to dry friction stir welding of AA 7075 alloy. A decrement of 21.68% is observed in the grain size in the cryogenic condition with correlation to the dry FSW process, indicating a drop in the coarse structure. With the curtailment of grain size and drop in temperature differential, compressive residual factor and corrosion resistance attenuated by 40.14% and 67.17% in the cryogenic FSW process in correlation to the dry FSW process, respectively.

Evaluation of Real-World Smart Sock-Based Temperature Monitoring Data as a Physiological Indicator of Early Diabetic Foot Injury: Case-Control Study (Preprint)

BACKGROUND Diabetic foot ulcers represent major health care complications both in terms of cost and impact to quality of life for patients with diabetic peripheral neuropathy. Temperature monitoring has been shown in previous studies to provide a useful signal of inflammation that may indicate the early presence of a foot injury. OBJECTIVE In this study we evaluated the temperature data for patients that presented with a diabetic foot injury while utilizing a sock-based remote temperature monitoring device. METHODS The study abstracted data from patients enrolled in a remote temperature monitoring program in year 2020-2021 using a smart sock (Siren Care, San Francisco, California, USA). In the study cohort, a total of 5 participants with a diabetes-related lower extremity injury during study period were identified. In the second comparison cohort, a total of 26 patients met the criteria for monitoring by the same methods that did not present with a diabetes-related podiatric injury during the same period. The 15-day temperature differential between six defined locations on each foot was the primary outcome measure among subjects who presented a diagnosed foot injury. Paired t-tests were used to compare the differences between the two groups. RESULTS A significant difference in temperature differential was observed in the group that presented with a podiatric injury over the course of evaluation vs. the comparator group that did not present with a podiatric injury with temperature measured in °F. The average difference from all six measured points was 1.4°F between the injury group (mean 3.6 +/- 3.0) and the comparator group (mean 2.2 +/- 2.5, t=-71.4; P<.000). CONCLUSIONS The presented study demonstrated significant temperature difference for patients presenting with a foot injury in a 15-day period prior to the diagnosis of an injury compared with a similar period for patients without an injury. The findings suggest temperature monitoring may be a predictor of a developing foot injury. The continuous temperature monitoring system employed has implications for further algorithm development to enable early detection. The study was limited by a nonrandomized, observational design with limited injuries present in the study period.

Effect of SiCw Whiskers on the indentation thermal shock resistance of ZrB2-MoSi2 Composites

A comparative evaluation of the thermal shock resistance (TSR) of ZrB2-20 MoSi2-20 SiCw (ZMSw20) and ZrB2-20 MoSi2 − 5SiCw (ZMSw5) composites were studied using the indentation quench method. High-dense ZrB2 based composites were prepared by multi-stage spark plasma sintering at 1700°C. The results show that the ZMSw20 composite expressed superior crack shielding and TSR under quenching circumstances. The critical temperature differential ΔTc of ZMSw20 ceramic (ΔTc= 800°C) was higher than that of ZMSw5 ceramic (ΔTc=600°C). The significant enhancement in TSR was imposed residual stresses that improved the resistance to crack progression during thermal shock. Furthermore, an increment in silicon carbide content reduces the crack growth, and increases the TSR of the composites.