Tuesday, January 1, 2019

5 most interesting facts about animal sixth sense

First of all, I want to tell you what is sixth sense!!!!
According to dictionary, sixth sense means 'a supposed intuitive faculty giving awareness not explicable in terms of normal perception.'
Almost everyone knows the five senses: sight, smell, hearing, touch, a taste. But what about a sixth sense? While humans only have five senses, there are plenty of animals with a sixth sense and sometimes even an seventh. Non-human animals might not have the same brain power as us  But they do possess something we do not - intelligent animal perceptions.  
Almost every animal, start behaving abnormal before earthquake .Animals that detect impending earthquakes don't necessarily have more senses than humans; they just have much higher sensitivity. The fact that animals have keener senses than humans is well-documented. Dogs have a remarkable sense of smell, birds can migrate using celestial cues, and bats can locate food with echoes. Elephants can detect faint vibrations and tremors (such as other elephants' footsteps) from fantastic distances.

1. Egyptian Vulture

Egyptian Vulture used to break its egg by using a stone. Because these vultures have weak beaks.For more information, you can watch youtube video.

2. Woodpecker

With their sharp, powerful beaks, Acorn Woodpeckers excavate custom holes into trees that are the perfect size to hold an unusual food—acorns. Each Acorn Woodpecker group works together to maintain and defend its acorn collection. The same tree, called a “granary”, is reused over generations to store the winter food supply. They us especial tool made up of cactus to put or take food from their stores.

3. Green Heron

They lure in fish using small items such as twigs or insects as bait.   Green Heron stand completely still in shallow water, waiting for a fish to swim by, which it then spears with its long, sharp beak. 

4.Octopus

octopus use coconut shells to protect themselves in water. There are lots of videos showing this kind of behavior.

4. Gorilla

Gorillas are considered highly intelligent. A few individuals in captivity, such as Koko, have been taught a subset of sign language. Like the other great apes, gorillas can laugh, grieve, have "rich emotional lives", develop strong family bonds, make and use tools, and think about the past and future.[55] Some researchers believe gorillas have spiritual feelings or religious sentiments
The following observations were made by a team led by Thomas Breuer of the Wildlife Conservation Society in September 2005. Gorillas are now known to use tools in the wild. A female gorilla in the NouabalĂ©-Ndoki National Park in the Republic of Congo was recorded using a stick as if to gauge the depth of water whilst crossing a swamp. A second female was seen using a tree stump as a bridge and also as a support whilst fishing in the swamp. This means all of the great apes are now known to use tools.[56]
In September 2005, a two-and-a-half-year-old gorilla in the Republic of Congo was discovered using rocks to smash open palm nuts inside a game sanctuary.[57] While this was the first such observation for a gorilla, over 40 years previously, chimpanzees had been seen using tools in the wild 'fishing' for termites. Great apes are endowed with semiprecision grips, and have been able to use both simple tools and even weapons, by improvising a club from a convenient fallen branch.


Sunday, December 30, 2018

Network graph theory

              Incidence Matrix    

  

Incidence matrix give information about incoming and outgoing currents at a node in a circuit. before going to incidence matrix , you should clear basic terms of graph network. 
Rank of matrix is n-1.The matrix order depend upon number of branches and number of nodes present in original graph.
Order of graph depend upon number of nodes (for row) and branches /edges(for column ).
the above diagram give basic idea of incidence matrix. In incidence matrix, incoming branches are taking as negative one , outgoing branches are taking as positive one and not connected branches are taking as zero. The sum of all column are zero.

Here the another matrix comes out which is known as reduced matrix. In reduced matrix nothing is new, just one row of incidence matrix is omitted of incidence matrix . Here is an example of reduced matrix:-


The sum of column not necessary to be zero.
Advantage of reduced matrix is , it required less elements as compared to incidence matrix. Basically,reduced matrix is used to find problem in circuit.

network theory ( Graph theory components )

The network graph theory/network topology is a graphical representation of electric circuits. The main concept of graph theory is to mak...