Internet of Things (IoT) provides many homecare systems and makes an easier life for humans. Some homecare systems are really useful for aged people. In our society, many aged people are suffering from a disease called dementia. Dementia word describes the set of symptoms that may contain memory loss and difficulty with thinking. The demented people are unable to recognize their family members. Also they have difficulty to deal with day to day activities. Taking care of such people is not a dominant task if assigned to a caretaker, but some people may not afford these much of expenses. Even if it is assigned to the caretaker, they may be burdened with the amount of care required. In this work, to reduce the burden on the caretakers, a homecare system using IoT is designed. An android camera phone installed at the door recognizes the face of the arrived person and sends an unique identifier wirelessly to an android watch wore by the demented person. The android watch alerts the user with vibration. Also, it opens the locally stored image using the unique identifier and announces the name of the arrived person. Reminder application is also used to remind the day to day activities with voice commands.

Thin-walled tube shaped components have been expansively utilized as an impact energy dissipating devices in modern vehicles in order to decrease fatalities and vehicle damage during accidents. The present article investigates the axial crushing performance of bi-tubular structures of various configurations. Nonlinear impact simulations were performed on the proposed bi-tubular structure using finite element ABAQUS/CAE explicit code. From the outcomes attained, the Energy Absorption Capability (EAC) of bi-tubular structures with stiffeners were compared and it confirmed that bi-tubular structures have more potential than that of traditional simple geometry tubes. Furthermore, bi-tubular structure of circle section enclosed with square type section were recommended as significant one for superior EAC. This kind of bi-tubular structures was found to be proficient energy absorbing elements in vehicles to improve the crashworthiness performance