GreenPhones: Energy-smart software for ubiquitous mobility

智能手机带来了一系列全新的应用，对人们的生活产生了根本性的影响。如今，智能手机的用途已经超越了简单的打电话和发短信，还包括为老年人提供帮助和为护理人员提供帮助。在未来，他们承诺会有一些激进的应用，比如让盲人能够拍摄视频和照片，并与他们的物理环境进行互动。这是通过智能手机包含的无数传感器（例如，摄像头、触摸和陀螺仪）、底层硬件的计算能力（目前高达四核cpu）和无处不在的网络连接实现的。由于电池的能量有限，开发智能手机的功能是一项非常具有挑战性的任务；目前，没有一个申请辅助生活的人能活超过6-8小时。

Smartphones are enabling an entirely new set of applications, resulting in a fundamental impact on people's lives. Smartphones today are being used for services beyond simple phone calls and messaging, including assitance for seniors and helpful aids for caregivers. In the future, they promise radical applications like enabling blind people to capture video and photos and in general interact with their physical environment. This is made possible through myriad sensors that smartphones include (e.g., camera, touch, and gyroscopes), the compute capability of the underlying hardware (upto quad-core CPUs today), and pervasive network connectivity. Exploiting the capabilities of the smartphone is a very challenging task due to the limited energy source of the battery; currently none of the applications for assisted living can be alive for more than 6-8hrs.