With the development of electronic equipment components in the direction of integration, miniaturization, and intelligence, their increasingly high heat dissipation requirements pose a high challenge to the thermal conductivity (TC) of thermal interface materials (TIMs). Polymer-based composite materials with high TC have gradually been favored because of their good processing performance, low cost, and low density. It is important to summarize the relationship between the problems of low heat conduction and their solutions in relation to polymer-based composite materials. For this purpose, this review comprehensively discusses the basic mechanisms of heat transfer inside polymer-based TIMs, the current challenges, and future prospects for improving TC. Strategies involving surface modification and network construction can reduce interfacial thermal resistance and enhance heat conduction.

<span>In medical practices, the storage space of electrocardiogram (ECG) records is a major concern. These records can contain hours of recording, necessitating a large amount of storage space. This problem is commonly addressed by compressing the ECG signal. The proposed work deal with the ECG signal compression method for ECG signals using discrete wavelet transform (DWT). The DWT appeared as powerful tools to compact signals and shows a signal in another time-frequency representation. It is very appropriate in the elimination &amp; removal of redundancy. The ECG signals are decomposed using DWT. After that, the coefficients that result from DWT are threshold depending on the energy packing efficiency (EPE) of the signal. The compression is achieved by the quantization and dual encoding techniques (run-length encoding &amp; Huffman encoding). The dual encoding technique compresses data significantly. The result of the proposed method shows better performance with compression ratios and good quality reconstructed signals. For example, the compression ratio (CR)=20.6, 10.7 and 11.1 with percent root mean square difference (PRD)=1%, 0.9% and 1% for using different DWT (Haar, db2 and FK4) Respectively.</span>

A multi-principal element FeMnNiAlC10 bulk alloy was produced by vacuum arc melting. The same alloy was sintered as a thin film on a silicon substrate by ion beam sputter deposition. The bulk alloy has a multiphase structure the elements predominantly segregating into iron manganese carbides and nickel aluminium phases. The thin film is amorphous without detectable phase segregations. The absence of segregation is attributed to the film composition and deposition onto substrate at temperature below 400 K. The corrosion resistance of the thin film alloy was evaluated in 3.5% NaCl. The FeMnNiAlC10 thin film alloy has better corrosion resistance than 304SS. The hardness of the thin film was approximately 7.2 ± 0.3 GPa and the reduced Young’s modulus was approximately 103 ± 4.6 GPa. FeMnNiAlC10 thin film could be a good candidate for coating oil and gas extraction soft iron infrastructure.

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A fiber Brag grating-based temperature sensor FBG together with high accuracy, resolution and compact size interrogation system using a short period grating was presented in this work. The designed sensor measures the temperature from 35 °C temperature to 41 °C which is represented the ranges of human body temperature for use in medical applications. In this paper, we present some results obtained from experiments within a measurement range from (35°C to 40°C) which is from hypothermia to hyperthermia) that the sensor has high sensitivity and high resolution of (85.9%) for FBG sensor. After the results we obtained and the features that the sensor enjoys, such as small size, immunity from electrical influence, and the ability to work in environments Magnetic Resonance Imaging (MRI) environments. The sensor can be used in hospitals and clinics for improvement and monitoring of patients. The importance of this work increases due to the COVID-19 pandemic we are going through, so this work can be proposed to contribute to monitoring patients’ cases and considered as a new equipment in studying temperature sensor in human.