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Aluminium A356 alloy is widely used at automobile and aircraft industries in the form of cast component with varying section size. This study investigates how the microstructure and mechanical properties of different section size vary before and after heat treatment and aging processes. Aluminium ingot is melted using a furnace and poured in to the mold having mold cavities of varying dimensions. Cast components are heat treated as per ASTM standard B917-01 at a temperature of 537°C for 12 hours followed by a temperature of 155º for 5 hours. In order to investigate the effect of heat treatment and aging processes microstructure and mechanical properties such as impact strength, hardness, and tensile strength were analysed as-cast condition and after heat treatment and aging process.

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In the general smart home, the system is an add-on to home automation and automation of systems guarantees human comforts like lighting, heating, ventilation, and security. In this proposed work, we have designed and implemented a low-cost smart home system using sensor multiplexing technique which is extendable, cheap, and multi-faceted and supported Node MCU (ESP8266). The sensors are used in the smart home to detect various flammable gases with the help of MQ-6 (LPG), MQ-7 (CO), and MQ-135 (CO 2 ) and environment parameters like temperature and humidity with the help of DHT11 sensor, and finally to detect intruder with the help of passive infrared rays (PIR) sensors. All the sensors' information is to measure and at the same time to upload it to IoT cloud (Ubidots) platform, and any sensor that exceeds its threshold value indicates an alert message on the LCD at the same time piezo-buzzer alerts in the form of beep sounds in surrounding areas. The major development of a home automation system is to comprehend most home appliances that use Wi-Fi for remote observance. Technological progress has increased the implementation of home systems leading to improved standards of living. Industrial smart home systems are still unaffordable to an enormous of the center and social class families. However, the emergence of low-cost microcontroller development boards, just like the Node MCU (ESP8266), has enabled the implementation of cheap and efficient home systems.

This paper studies the mechanical properties of the aramid fiber reinforced epoxy resin composite by varying the percentage composition. Three different compositions of aramid fiber are 30 %, 35 % and 45 % by weight. The aramid epoxy composite was manufactured by the vacuum suction method. The manufactured composites are then cured by the hot air oven for 180 minutes. The prepared composites undergo through various tests such as the tensile test, hardness test and impact test. The results of the tests on the three compositions analyzed and variation in its mechanical properties is noted.