How sound waves can help select healthy sperm
A new process developed by Monash University researchers has found that by using sound waves to sift through sperm the strongest swimmers can be picked out.
http://dlvr.it/Rn1w7n
http://dlvr.it/Rn1w7n
How Often Do Stores Check Their Security Cameras?
Security cameras have been in use in stores for ages and since they were first used they have helped to stop crimes. Stores of all kinds have implemented security cameras. Grocery stores, convenience stores, electronics stores, and even clothing stores all have security cameras on the property. One common question among store owners is: how often do stores check their security cameras ? Am I checking them enough? For most stores, the answer is not often enough. It is common practice to only check the security cameras when something has gone wrong . That means after someone has stolen, when they see someone stealing, or after a safety incident. In most cases that means that you can’t actually prevent crime, just respond to it. Depending on the location of the store, crimes significant enough to check security footage for could only happen once a month or so. Some stores have video monitors positioned around the store so that staff can always observe what is happening o