Friday 27 May 2016
voltage
It is also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field.
A system backup is the process of backing up the operating system, files and system-specific useful/essential data. Backup is a process in which the state, files and data of a computer system are duplicated to be used as a backup or data substitute when the primary system data is corrupted, deleted or lost.
keil uvision
The industry-standard Keil C Compilers, Macro Assemblers, Debuggers, Real-time Kernels, Single-board Computers, and Emulators support all 8051 derivatives and help you get your projects completed on schedule.
https://drive.google.com/file/d/0B2Zd8ycjE1q8MEdUaHFCZ24weXc/view?usp=sharing
https://drive.google.com/file/d/0B2Zd8ycjE1q8MEdUaHFCZ24weXc/view?usp=sharing
Thursday 26 May 2016
Engineering Facts: Inverter
Engineering Facts: Inverter: https://drive.google.com/file/d/0B2Zd8ycjE1q8QzVxeFYxLW5oalU/view?usp=sharing
Monday 23 May 2016
Aerosol
Aerosol
Mist and clouds are aerosols. Because dust
particles mostly settle to the ground, this visible dust is a suspension, not
an aerosol. Very fine dust, common in the Sahara Desert, however, can
constitute an aerosol as it travels on the winds for weeks.
An aerosol is a colloid of fine
solid particles or liquid droplets, in air or another gas. Aerosols can be
natural or artificial. Examples of natural aerosols are fog, forest exudates
and geyser steam. Examples of artificial aerosols are haze, dust, particulate
air pollutants and smoke. The liquid or solid particles have diameter mostly
smaller than 1 μm or so; larger particles with a significant settling speed
make the mixture a suspension, but the distinction is not clear-cut. In general
conversation, aerosol usually refers to an aerosol spray that delivers a
consumer product from a can or similar container. Other technological
applications of aerosols include dispersal of pesticides, medical treatment of
respiratory illnesses, and combustion technology. Diseases can also spread by
means of small droplets in the breath, also called aerosols.
Definitions
Photomicrograph made with a Scanning Electron
Microscope (SEM): Fly ash particles at 2,000x magnification. Most of the
particles in this aerosol are nearly spherical.
An aerosol is defined as a
colloidal system of solid or liquid particles in a gas. An aerosol includes
both the particles and the suspending gas, which is usually air.Frederick G.
Donnan presumably first used the term aerosol during World War I to describe an
aero-solution, clouds of microscopic particles in air. This term developed
analogously to the term hydrosol, a colloid system with water as the dispersing
medium. Primary aerosols contain particles introduced directly into the gas;
secondary aerosols form through gas-to-particle conversion.
Stability
of generated aerosol particles,
Stability of nanoparticle
agglomerates is critical for estimating size distribution of aerosolized
particles from nano-powders or other sources. At nanotechnology workplaces,
workers can be exposed via inhalation to potentially toxic substances during
handling and processing of nanomaterials. Nanoparticles in the air often form
agglomerates due to attractive inter-particle forces, such as vander
Waals force or electrostatic
force if the particles are charged. As a result, aerosol particles are usually
observed as agglomerates rather than individual particles.
Effects of
Aerosols;
Volcanic eruptions release large
amounts of sulphuric acid, hydrogen sulphide and hydrochloric acid into the
atmosphere. These gases represent aerosols and eventually return to earth as
acid rain, having a number of adverse effects on the environment and human
life.
Aerosols interact with the
Earth's energy budget in two ways, directly and indirectly.E.g., a direct
effect is that aerosols scatter sunlight directly back into space. This can
lead to a significant decrease in the temperature, being an additional element
to the greenhouse effect and therefore contributing to the global climate change.
The indirect effects refer to
the aerosols interfering with formations that interact directly with radiation.
For example, they are able to modify the size of the cloud particles in the
lower atmosphere, thereby changing the way clouds reflect and absorb light and
therefore modifying the Earth's energy budget.
When aerosols absorb pollutants,
it facilitates the deposition of pollutants to the surface of the earth as well
as to bodies of water.This has the potential to be damaging to both the
environment and human health.
Aerosol particles with an
effective diameter smaller than 10 μm can enter the bronchi, while the ones
with an effective diameter smaller than 2.5 μm can enter as far as the gas
exchange region in the lungs,which can be hazardous to human health.
Mercury emissions
Mercury emissions:
In
March 2005, nine states (California, New York, New Jersey, New Hampshire,
Massachusetts, Maine, Connecticut, New Mexico and Vermont) sued the EPA. The
EPA's inspector general had determined that the EPA's regulation of mercury emissions did not follow the Clean Air Act, and
that the regulations were influenced by top political appointees. The EPA had
suppressed a study it commissioned by Harvard University which contradicted its position on mercury controls.
The suit alleges that the EPA's rule allowing exemption from "maximum
available control technology" was illegal, and additionally charged that
the EPA's system of pollution credit trading allows power plants to forego
reducing mercury emissions. Several states also began to enact their own
mercury emission regulations. Illinois's proposed rule would have reduced
mercury emissions from power plants by an average of 90% by 2009MSunday 22 May 2016
What is Engineering
Eningieering is the 7th sense that destroy all the 6 senses and makes the person non-sense;D
Saturday 21 May 2016
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