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In this modern world, security is the main challenging thing and crime has become ultra-modern too Motwani, (2021); Ray (2022); Rahman et al. (2018); & Vamsi, et al. (2019). In this current time a lot of incidents occur like robbery, stealing, and many more. Anyone can enter your private home at any time to steal your property. Doors serve as entrances to our homes, offices and many other kinds of enclosure; they may also provide access for strangers, criminals, and offenders. Doors are meant to be secured and to prevent intrusions from unwanted persons. Individuals and cooperate bodies are becoming more aware of the dangers associated with relying on keys and parameter fencing to provide security to exclusive areas of their apartments and organization because criminals and fraudsters can forge keys or make master keys that can be used to break into such rooms or offices. So the security does matter in this daily life. People always remain busy in their day to day work also want to ensure the safety of their beloved things. Sometimes they forget to look after their necessary things like keys, wallets and credit cards. Without these, they are unable to access their home or any place they want. To prevent such incidents many scholars came into action and tried to prohibit them. In this experimental design, a new system is designed using ARDUINO UNO which would control the door through utilizing a camera and a distance ultrasonic sensor-based technology without any complexity. A motor is fitted to the door so that door will open only when password is matched. The system keeps a picture of the visitor as evidence that would be needed if any unwanted situation occurs like stealing, and robbery. This experimental design has a known password and the information is stored in the database. When the correct pass code is entered, the microcontroller will give instruction to servo motor. Servo motor performs the action on door unlocking.

Most countries have high demand of electricity. Load shedding is a way of shedding loads when the electricity demand is higher than the total generation, Butt et al. (2020). Therefore, to protect the system solar powered systems are used in households. The experimental design set up system includes a battery, comparator and control of the system. The design allows energy conservation and the design process uses Droid Telsa application. Simulations of circuit battery voltages are simulated at different voltages. The design is sensitive to slight voltage changes.

Bibliography: pages 92-95., This study examines the formability of an AISI 301 based metastable austenitic stainless steel, in which nitrogen partially substitutes nickel. In order to understand the formability of the experimental alloys, the tensile behaviour of the alloys is characterised. The tensile properties of metastable austenitic stainless steels are governed by austenite stability which is related to alloy composition and test temperature. At certain alloy compositions, transformation induced plasticity (TRIP) occurs. TRIP depends on the manner in which deformation induced martensite forms in the steels. Incipient necking is resisted if the martensite forms gradually and selectively, preventing propagation of micronecks and microcracks. Tensile tests performed from -5 to 100°C were used to study the effect of TRIP on the ductility of these alloys and optimum tensile properties were obtained at room temperature. In addition, the effect of copper on TRIP and subsequently formability were ascertained using copper alloyed stainless steels. Important stretch formability parameters were obtained from the tensile test which is an intrinsic formability test. TRIP results in improved formability of metastable austenitic stainless steels, and a simulative Engelhardt test was performed to ascertain the effect of TRIP on drawability of the test alloys. It was found that alloys with TRIP characteristics exhibited good drawability and in all cases the test alloys had better limiting drawing ratios than AISI 304 stainless steel. Delayed cracking occurred in alloys with more than 0.2 percent nitrogen content and a low austenite stability, probably as a result of embrittlement of the deformation induced martensite by nitrogen. A study of the cavitation erosion of the test alloys was initiated because it is known that TRIP enhances cavitation erosion resistance in stainless steels. Results indicate that the metastable test alloys demonstrate superior erosion resistance when compared with the stable experimental alloys. Cavitation induced martensite was found in metastable alloys using x-ray diffraction.