Parkinson’s disease (PD) initially affects on motor activities of the patient. The symptoms of the disease include tremors, muscular rigidity, changes in gait, and complications in speech. In this paper, the experimental procedure for the acquisition of EMG and accelerometer data is explained. From the data, tremor frequency is evaluated. Tremor is an involuntary shaking of the body or the limbs which is considered as an early symptom of Parkinson’s disease. EMG instrument, sensors, selection of muscles in the study, data acquisition procedure, analysis of EMG and accelerometer signal are discussed in this paper. Then the signals were analyzed in the frequency domain to assess tremor frequency in the hand. Since the signals were taken from the underlying muscles of the skin, the results are relatively accurate than indirect methods of hand tremor assessment.

This research paper reports the scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS) analysis and microhardness variation in a stainless steel-copper braze joint. The brazing of copper with stainless steel has been performed at temperatures in the range of 640-680 °C for the time durations in the range of 5-15 min by using a copper-based brazing filler metal (BFM) under an argon gas atmosphere in a brazing furnace. Material’s chemistry of brazed samples has been studied by energy dispersive spectroscopy (EDS) system linked with a Phenom Pro X scanning electron microscope (Phenom Pro SEM). It has been found that Ni atoms from the BFM diffused into stainless steel owing to the better solid solubility of Ni in Fe than that of Cu in Fe. A low Sn at.% was observed in the EDS image for BFM region; this elemental distribution has been attributed to the possibility of reaction of Sn with Fe to form an intermetallic compound: FeSn2. The spatial distribution of various elements has been studied by mapping analysis by using SEM-EDS technique for a brazed sample that showed the penetration depth of Ni and P to stainless steel and Copper regions. Microhardness measurements at various locations of the brazed sample have been made and analyzed. The microhardness data has been graphically analyzed and related to brazing parameters.