Friday, 20 October 2017
Cockroaches are among the most enviable species in the world, thanks to their capability to endure some of the most deadly situations and come out just fine. For example, a cockroach has a higher resistance to radiation than human beings, (although contrary to popular myth, it can not survive a nuclear blast). It can also hold its breath for as long as 40 minutes, and it can last for weeks without food.
[caption id="attachment_2922" align="aligncenter" width="400"] Source - Twitter: @yaboiroachbug[/caption]
The most remarkable thing of all, a roach can survive without its brain! And not just for a minute or two, a decapitated cockroach can go on living for weeks and sometimes months on end!
Before we dive deeper into this mystery of roaches' headless survival, let's first examine why people (and nearly every animal on earth) cannot endure without their precious heads.
Why can't humans survive without their heads?
It's a well-known fact that human beings can not survive without their heads. There are quite a variety of anatomical factors behind this, but for the scope of this article, we will address just the ones that pertain to the case of headless roaches.
Firstly, decapitation leads to an extremely high amount of blood loss, which no human can make it through. This rapid bleeding would result in an inevitable drop in blood pressure, which implies that oxygen might not be carried to every part of the body, leading to death.
[caption id="attachment_2923" align="aligncenter" width="831"] The human "head" plays host to a variety of vital biological processes to sustain life.[/caption]
The nose, which is the chief facilitator of respiration in people, as it enables for inhalation and exhalation, is situated on our face, which is part of the head. Without the head, there would be no respiration, and therefore no opportunity for life to persist. Moreover, humans consume with their mouth, which is likewise located in the head. Obviously, that's another issue. Finally, since almost everything is controlled by the brain sitting at the top of the body, life for humans beings cannot be imagined without their head.
How can roaches endure without their heads?
Open circulatory system in cockroaches
To begin with, there's a significant distinction between humans and roaches relating to how blood flows throughout their particular bodies. The human body includes a complex circulatory system with a bunch of arteries, veins and various capillaries that crisscross inside the body to provide oxygen, in addition to crucial nutrients, for survival.
[caption id="attachment_2924" align="aligncenter" width="900"] A decapitation injury on a cockroach is quickly sealed off by clotting, preventing uncontrolled bleeding. Image Source: Nano Vina[/caption]
On the contrary, cockroaches have an 'open' circulatory system; it's rather primary and consists of just a little number of components. This avoids quick, unchecked blood loss following decapitation, as their necks are rapidly "sealed off" by clotting.
Respiration in cockroaches.
Unlike human beings, roaches do not need their mouths to inhale and exhale, as they do not rely on a single organ like we do, to serve that purpose. They breathe through lots of pipelines that are linked to holes (called spiracles) spread out along the length of their bodies.
[caption id="attachment_2925" align="aligncenter" width="810"] Even without its head, a cockroach has little or no problem as far as its breathing is concerned.[/caption]
How does a decapitated cockroach live without its brain and food?
A roach's brain, as you can think of, is not almost as complicated as ours. A cockroach's brain consists of clumps of ganglia — heaps of nerve tissues — that help it in performing the most fundamental sensory functions (like responding to touch, a flash of light, etc.). A no-brain situation, for that reason, is not that big of a concern as far as survival (in appropriate conditions) for a few weeks is concerned.
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When it comes to the food, roaches are cold-blooded animals, which indicates that unlike their hot-blooded equivalents (e.g., human beings), they can last for days on a single meal they had on an excellent food-finding day. Moreover, without their head, they could not potentially be extremely physically active, so their energy would be saved too, helping them last for weeks without food.
[caption id="attachment_2926" align="aligncenter" width="619"] Heads are so over-rated - Source: Jen Seng[/caption]
In a nutshell, a cockroach can last weeks without its head, supplied it's not attacked by an infection, mold, bacteria, or predators and remains in a relatively cold environment.
References:Cockroach on Wikipedia, Ganglion, Cockroach FAQ: Microbiology Department at UMass Amherst, Scientific American
Wednesday, 18 October 2017
It seems like tablets get used for everything these days. You walk into the clothing store, and a sales clerk offers to show you the latest style on a screen; you sit down at your favorite restaurant, and the server takes your order on an iPad. You get home from a business meeting after using your tablet to interface your presentation from tablet to screen, and perhaps you’ll check your emails and social media before switching on a movie.
Needless to say, the tablet sells itself. But does it stand to replace the laptop in the near future? Probably not, and here’s why.
If you’ve ever tried to type up a report on a tablet, you’ll know it takes you twice as long as when you’re using a laptop. What’s more, the tiny touch-screen pad is just asking for errors to be made.
Even if you think you can sidestep the ergonomic discomforts by investing in a USB keyboard and an iPad stand, the screen is too small, and the applications for creating documents just aren’t that advanced.
When you consider the many accessories you might use for both your work and personal life (such as digital camera, external hard drives, printers, scanners and streaming devices) they usually have one thing in common: they all link up with your laptop or desktop computer. When you try to use your tablet to perform these tasks, you start spending money on pricey cables and running into compatibility problems.
Nowadays, laptops have around ten times the amount of memory than tablets. However, there will come a time when you will need to upgrade your laptop’s RAM (random access memory). Unlike tablets, you can increase the memory of your laptop easily. By increasing your laptop memory, your laptop will be able to perform more tasks at once, improving its overall speed. Therefore, if you need to increase your laptop memory, search online for a trusted memory distributor such as Offtek, and enquire about products they have available.
When using a tablet, in most cases, it’s not currently possible to run two applications side by side. Recent versions of Android tablets have multitasking enabled but they aren’t as efficient as compared to running on a laptop. In certain types of jobs, this can pose all manner of problems, but mostly it makes multitasking difficult, especially since apps on tablets are prone to crashing. Larger screens make it visibly easier to juggle tasks, as well as allowing for more straightforward navigation between web pages.
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While laptops are more expensive than tablets, you get more for your money when you invest in a computer. Plus, a laptop will have a longer lifespan than any other device, and it’s less likely to be lost or stolen. If you’re buying an iPad for work purposes, you may find you end up paying out much more money on accessories than you were expecting. Additionally, most tablets have a built-in battery with a limited lifespan whereas most laptops have a removable battery. In this case, a laptop is far more cost-effective.
Tablets are incredibly useful when it comes to reading eBooks, streaming videos and taking photos, but they are not as reliable as computers in the workplace. In short, a tablet is an excellent addition to your tech collection, but it shouldn’t replace your laptop.
The post Why You Shouldn’t be Trading in Your Laptop for a Tablet appeared first on GadgTecs.
from GadgTecs http://bit.ly/2yvM9Zd
Tuesday, 17 October 2017
We conducted a survey and asked participants to rank their top roadblocks to productivity. See the results from team leaders and team members below.
Infographic brought to you by Wrike project management cloud software
The post 15 Roadblocks to Productivity that you can overcome appeared first on GadgTecs.
from GadgTecs http://bit.ly/2zeFvWm