Micromachining plays a vital role in the manufacturing industry in producing microcomponents with high sensitivity and fine dimensional tolerances for implant materials in medical applications. Micro-machining can be carried out through various machining processes like physical, chemical and biological processes, although the use of biological machining is limited. In biological machining, microorganisms are used as a source of energy to machine the components, and machining with microorganism brings a lot of advantages in the machining process like the production of components with lower energy resources, low cost, no heat-affected zone and fine dimensional tolerances, which makes it suitable for machining implant materials. In other machining process like conventional and unconventional machining processes, the heat-affected zone, dimensional tolerances and environmental-related problems are the major issues, as these processes generate more heat while machining. This damages the material, which will not be able to be used for certain applications, and this issue can be overcome by bio-machining. In this present work, nickel, titanium and nitinol are manufactured using the powder metallurgy technique. They are manufactured as a 10 mm diameter and 5 mm thick pellet. The fabricated nickel, titanium and nitinol shape memory alloys are machined with Acidithiobacillus ferrooxidans microorganisms to obtain a better material removal rate and surface roughness and to check the bio-machining performance by considering various parameters such as shaking speed, temperature, pH and percentage of ferric content for the future scope of biomedical applications. Considering these parameters, microorganisms play a vital role in the temperature, shaking speed and time of the bio-machining process, and it was observed that a better material removal rate and surface roughness are achieved at a temperature of 30 °C, shaking speed of 140 rpm and machining time of 72 h.

Recruitment and selection are the most important process of any organization in analysing the candidates to bring in resourceful talents. The study is made to analyse the recruitment and selection process, the employees’ satisfaction level with the current recruitment practices and also to identify the impact of employment and selection process on organization presentation. To arrive at the required data for analysis, both primary and secondary data collection methods were employed. From the study, it is understood that utilisation of fair, valid and reliable recruitment and selection process helps in improving the business by the point view of market by helping in decision-making in critical situations. To know the employee satisfaction levels, recruitment and Selection process can be used to understand the requirement of motivational and encouraging activities that are conducted to improve the skills, experience and information of the employer and employee. Identifying the strengths and weakness of the employee is very essential for organizational growth which leads to bring about changes inside the business with regard to a variety of factors including working conditions, the attitudes and behaviours of employers who execute their jobs well, productivity-boosting strategies, the usage of cutting-edge technology etc.

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