Ad-hoc wireless network with a huge amount of static or mobile sensors is called wireless sensor network (WSN). The sensors collaborate to sense, collect and process the raw information of the phenomenon in sensing area (in-network), and transmit the processed information to the observers. Robustness, fault tolerance, and furthermore are prime factors to be consider before designing wireless sensor network. It is theoretically proved through math modeling, theoretical analysis and formula deducting that sensor deployments in the form of equilateral triangle, as a rule, are better than those in the form of square, hexagon and octagon. The theoretical analysis formula has given that minimum number of sensor nodes is demanded in a given sensor field if the field is covered fully and seamlessly and efficient coverage area ratio decrease with increase of sensor nodes comparing to same grid.
We describe a workflow for efficient, environmentally attentive, and sustainable practices related to routine agarose gel electrophoresis. The methods reduce plastic waste and improve efficiency, especially for the exhaustive screening of difficult-to-obtain plasmids. Sustainability is increased when agarose is used ten times over by virtue of a thorough recycling regimen. The workflow optimizes workspaces and standardizes lab practices for handling potentially hazardous waste, minimizing environmental harm. Safety, efficiency, and sustainability improve laboratory productivity, help minimize environmental contamination, and increase cost-effectiveness.
A common laboratory method involves gel electrophoresis followed by photographic documentation of the results, a procedure which is performed worldwide by students and experienced scientists alike. Proprietary Gel Documentation Systems are convenient and useful for documentation of electrophoresis results, but the systems can be prohibitively expensive to purchase and repair, they contain features that are not necessary for everyday documentation, and some users may not find the systems intuitive to operate. We describe our gel documentation setup that meets the everyday needs for documentation in our lab. The setup is inexpensive, modular, user friendly, and increases sustainability through extending the working life of obsolete cell phones, iPads, or other electronic devices containing a camera. More importantly, the setup completely shields users from potentially damaging ultraviolet radiation.
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