Discovery Of Nano tube

Nano tubes have a nanometer-scale tube-like structure. Nanotubes are a type of nanoparticle, and it can be large enough to work as a pipe through which other nanoparticles can be done on a channel or material basis, as an electrical conductor or electrical insulator. Can be used.

Carbon nanotubes discovered in the first nanotube were found in 1952 by L. V. Radkekevich and V. M. Lukanovich published clear images of 50 nanometer diameter tubes made of carbon in the Soviet Journal of Physical Chemistry. This search was largely unnoticed because the article was published in Russian. And the reach of Western scientists was limited to the Soviet press during the Cold War.

Before being known as the carbon nanotube in 1976, Moranobu Endo of CNRS opened the hollow tubes of graphite sheets aligned with chemical vapor-growth techniques. The first sample seen was later known as the Single Wall Carbon Nanotube (SWNT). Three scientists first show images of nanotube with a single graphene wall.

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The Seven-Step Model of Migration

Irrespective of the migration approach adopted, the Seven-step Model of Cloud Migration creates a more rational point of view towards the migration process and offers the ability to imbibe several best practices throughout the journey Step 1: Assess Cloud migration assessments are conducted to understand the complexities in the migration process at the code, design and architectural levels. The investment and the recurring costs are also evaluated along with gauging the tools, test cases, functionalities and other features related to the configuration. Step 2: Isolate The applications to be migrated to the cloud from the internal data center are freed of dependencies pertaining to the environment and the existing system. This step cuts a clearer picture about the complexity of the migration process. Step 3: Map Most organisations hold a detailed mapping of their environment with all the systems and applications. This information can be used to distinguish between the ...

Special Permissions in linux

The setuid permission on an executable file means that the command will run as the user owning the file, not as the user that ran the command. One example is the passwd command: [student@desktopX ~]$ ls -l /usr/bin/passwd -rw s r-xr-x. 1 root root 35504 Jul 16 2010 /usr/bin/passwd In a long listing, you can spot the setuid permissions by a lowercase s where you would normally expect the x (owner execute permissions) to be. If the owner does not have execute permissions, this will be replaced by an uppercase S . The special permission setgid on a directory means that files created in the directory will inherit their group ownership from the directory, rather than inheriting it from the creating user. This is commonly used on group collaborative directories to automatically change a file from the default private group to the shared group, or if files in a directory should be...

RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version

import tweepy /usr/lib/python2.7/dist-packages/requests/__init__.py:80: RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version! RequestsDependencyWarning) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/tweepy/__init__.py", line 14, in <module> from tweepy.api import API File "/usr/local/lib/python2.7/dist-packages/tweepy/api.py", line 12, in <module> from tweepy.binder import bind_api File "/usr/local/lib/python2.7/dist-packages/tweepy/binder.py", line 11, in <module> import requests File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 97, in <module> from . import utils File "/usr/lib/python2.7/dist-packages/requests/utils.py", line 26, in <module> from ._internal_utils import to...

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