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Showing posts from October, 2021

What is Digital Rights Management (DRM)?

Digital Rights Management (DRM) is a way to protect copyrights for digital media. This approach includes the use of technologies that limit the copying and use of copyrighted works and proprietary software. In a way, digital rights management allows publishers or authors to control what paying users can do with their works. For companies, implementing digital rights management systems or processes can help to prevent users from accessing or using certain assets, allowing the organization to avoid legal issues that arise from unauthorized use. Today, DRM is playing a growing role in data security. With the rise of peer-to-peer file exchange services such as torrent sites, online piracy has been the bane of copyrighted material. DRM technologies do not catch those who engage in piracy. Instead, they make it impossible to steal or share the content in the first place. Most of the time, digital rights management includes codes that prohibit copying, or codes that limit the time or number o

What is CCS Technology (Carbon Dioxide Capture and Sequestration)?

Carbon Sequesteration is the process of capturing, securing and storing carbon dioxide from the atmosphere. This set of technologies can greatly reduce carbon dioxide emissions from new and existing coal and gas-fired power plants and large industrial sources.  There are two main types of CCS technologies - Biological and Geological.  Biological carbon sequestration is the storage of carbon dioxide in vegetation such as grasslands or forests, as well as in soils and oceans. Geological carbon sequestration is the process of storing carbon dioxide in underground geologic formations, or rocks.  Scientists are exploring a third alternative of technological sequestration, some of the methods employed are Graphene Production (uses carbon as a raw material ), Direct Air Capture and Engineered molecules, capable of capturing carbon dioxide from air! There is international agreement that CCS is a safe and successful strategy to manage large volumes of CO2 over the long term. In 2005, the Interg

Why do Mosquitoes bite some people and not others?

It has taken decades of research, but scientists are close to working out why mosquitoes bite some people, and not others.  It comes down to a complex trifecta of carbon dioxide, body temperature and body odour that makes some people more inviting to mozzies than others. Mosquitoes first use carbon dioxide (CO2) to track their quarry, much like I use my well-honed sense of smell to track down a freshly baked apple pie. CO2 is emitted by its mammalian blood donor, which mosquitoes can detect from up to 50 metres away. They fly upstream using the shift in concentration of CO2 along this stream to orient themselves. Subsequently people that emit higher levels of CO2 are more attractive from a distance such as those that are exercising or others that have a higher resting metabolism, such as larger individuals.  In general, this means men are more likely to attract mosquitoes than women, children are less susceptible than adults, and full-figured individuals including pregnant women are mo

How Do Coral Reefs Form?

Before learning how reefs form, it's helpful to define a reef. Acoral reef is made up of animals called stony corals. The stony corals are made up of tiny, soft colonial organisms called polyps. Polyps look a lot like a sea anemone, as they are related to these animals. They are invertebrates in the Cnidaria phylum. As the polyps live, reproduce, and die, they leave their skeletons behind. A coral reef is built up by layers of these skeletons covered by living polyps. The polyps reproduce either through fragmentation (when a piece breaks off and new polyps form) or sexual reproduction through spawning. A reef ecosystems may be made up of many species of corals. Healthy reefs are typically colorful, highly biodiverse areas made up of a mishmash of corals and the species that inhabit them, such as fish, sea turtles, and invertebrates such as sponges, shrimp, lobsters, crabs, and seahorses. Soft corals, like sea fans, may be found within a coral reef ecosystem, but do not build reefs

What is the difference in a jet airplane engine and a rocket?

One difference between rockets and jets is found in the type of fuel they burn. Jet engines are air breathers. They take in air (which contains oxygen needed for combustion), mix it with fuel, burn it to increase the pressure, and exhaust the spent gases out the back at a high rate of speed. This high-speed ejection of mass propels the plane forward. Rockets do almost the same thing with two exceptions. Unlike jets, they carry their own oxygen along with them and a rocket does not have wings that add lift. Rocket fuel can burn without external oxygen being present. As a side note, once a solid fuel rocket is ignited, it cannot be turned off. Jet engines must have outside oxygen from the air. Another difference is that jet planes have wings for lift and rockets do not. The density of air and the speed of the plane affect the lift on the wings. For rockets the lift (thrust) is provided solely by the expelled gases. Therefore, a rocket can travel in the vacuum of space void of air, but a