November 28, 2020

How To Ditch Your Cell Phone (And Still Communicate)

IPhone users are familiar with Air Sharing as one of the best “cloud” applications for...

IPhone users are familiar with Air Sharing as one of the best “cloud” applications for mobile phones. Wow! You really understand the topic of solar power. I have seen some inexpensive systems, and am working on one now. We document the habits that make a difference, whether people are interested in fueling their bodies with the most nutritious foods, navigating new workouts, reaching or maintaining a healthy weight or finding other ways to improve their overall health and wellbeing. One of the potential drawbacks for using cellulose in electronic devices is its resistivity. Cellulose can easily dampen electronic signals and must be modified in instances in which substrate conductivity is required. Graphene is a highly conductive allomorph of carbon and has recently been the focus of many materials and electrical engineers due to its conductivity and mechanical toughness. Cellulose nanocrystals have been shown to be a powerful reinforcing agent in polymer chemistry, and so they can also be a reinforcing agent in flexible, wearable electronics. According to a recent publication, a thin-film graphene oxide film was created with layers of cellulose nanocrystals sandwiched between layers of graphene oxide. At ~40% NCC and 60% graphene oxide, the thin film remained highly conductive (5000 S m−1), transparent, and flexible (Xiong et al., 2016). The method of layer-by-layer incorporation of NCCs into a graphene thin film is very labor intensive and, although useful, may not be necessary for many applications. Other groups have shown that cellulose can be coated with graphene sheets by simple filtration of a graphene solution through a cellulose membrane to yield cellulose-based capacitors (Weng et al., 2011; Beeran et al., 2016). This simple method yields graphene-coated cellulose networks that remain flexible. The graphene adsorbs to the cellulose through electrostatic interactions. According to the authors, the only limitation to this method lies in the varying pore sizes within the network; as long as the graphene can penetrate the pores, it will coat the fibers. The team’s neuroscientists identified the specific neural signals needed to control a prosthetic device, such as a robotic arm or a computer cursor. The team’s electrical engineers then designed the circuitry that would enable a future, wireless brain-computer interface to process and transmit these these carefully identified and isolated signals, using less power and thus making it safe to implant the device on the surface of the brain. Electronic engineers also have to be familiar with the electrical engineering technology that deals with control systems as well. Control systems are used to control electrical devices as well as regulate and command them. Engineers must know the differences between sequential controls and linear controls and how to properly and effectively use these control systems. This type of electrical engineering technology can be used in a variety of ways from controlling your computer to controlling aspects of a space shuttle.