Vaccine Refrigerator Regulator with Data Logger & Back-up Power Supply

Is your back-up power ready?

Wireless Data logger Using ZigBee

This paper illustrates environmental parameters monitoring at a remote unit based on Arduino capable of transmitting the parameters to the main unit which later processes for further environmental predictions. This also explains the practical implementation of the wireless communication protocol using ZigBee, data logging, data processing using VB.net.

A Fully Digital, Energy-Efficient, Adaptive Power-Supply Regulator

A voltage scaling technique for energy-efficient operation requires an adaptive power-supply regulator to significantly reduce dynamic power consumption in synchronous digital circuits. A digitally controlled power converter that dynamically tracks circuit performance with a ring oscillator and regulates the supply voltage to the minimum required to operate at a desired frequency is presented. ...

Influenza vaccine supply, 2005–2006: did we come up short?

BACKGROUND Although total influenza vaccine doses available in the 2005/2006 influenza season were over 80 million, CDC received many reports of delayed and diminished vaccine shipments in October to November of 2005. To better understand the supply problems, CDC and partners surveyed several health care professional groups. METHODS Surveys were sent to representative samples of influenza vac...

Variometer with GPS logger

Variometer is a device that informs user about his/her vertical velocity. It is particularly useful in paragliding, hang gliding and other air sports. The device has to inform user about vertical velocity by sound. Ground position of user is important too, because of complex functions (e.g., computing flying range, altitude above ground) and after-flight evaluation. This paper deals with the ha...