Selasa, September 02, 2008

Space Tourism

By Abdurrahman



What are we going to talk about?
These are trips by ordinary people to space, not as scientists or
technologists, but for personal reasons including adventure, recreation and business.

Who’s the first?
Sixty-year-old California financier Dennis Tito lifts off into space aboard Russia’s Soyuz spacecraft and becomes the world’s first paying space tourist. Tito, who paid Russia a reported $20 million for the trip, spent six days on the International Space Station before returning to Earth.

What do they say about space tourism?
Japanese Rocket Society:
if some $12 billion of funding became available in the near future, commercial passenger space travel services to and from Earth orbit could begin in 2010. At a growth rate of some 100,000 passengers/year/year the business could reach 700,000 passengers/ year by 2017, at a price of about $25,000 /passenger. The importance of this result is that $12 billion is less than half of one year's funding of government space agencies today, and it is therefore readily affordable. By 2030 space tourism activities could have grown to a scale of $100 billion/year, creating several million jobs. It thereby demonstrates the very great economic value of such a development; approximately $1 trillion greater than the value of continued taxpayer funding of space agencies' activities without developing space tourism.

How can they be so confidence?
Analysis indicates that future market revenues will come from large and established industries that can improve their bottom line by doing business in space.

The plan
1. sub-orbital trips (lasting less than 1 hr; all in the space transportation vehicle)
2. three orbit trips (lasting up to 5 hours; all in the space transportation vehicle)
3. three day trips (possibly including a LEO facility)
4. resort packages (with stays of 1-2 weeks at a LEO facility and possibly even extrafacility activities)

How to reach that plan?
Space tourism fields for research
Life Sciences
Short-term orbital stays by average people
Tests of full range of anti-emetics
Treatments of minor ailments in micro-gravity
Propulsion
Development of reusable rocket operation and maintenance procedures
Design of rockets for ease of maintenance
Reusable rocket engine reliability increase
Reusable rocket engine noise suppression
Cost reduction
Transportation
Passenger vehicle size optimisation
Passenger vehicle optimisation for different routes
Orbital propellant production and handling
Orbital Accommodation
Large windows
Micro-gravity plumbing
Facilities for large numbers of guests
Micro-gravity interior design
Cost reduction through mass production
Rotating facilities
Legal/Insurance Issues
Collaboration with aviation
Implementation of liability for damage in space
Implementation of space salvage laws
Insurance industry contribution to vehicle design
Space building standards

Conclusion
Tourism is not bounded to earth. We can extend it further by space tourism. Some people say that if some $12 billion of funding became available in the near future, commercial passenger space travel services to and from Earth orbit could begin in 2010.

Surface Ozone, Dangerous Polutant

By Novita Ambarsari



Ozone…
• Ozone or trioxygen (O3) is a triatomic molecule, consisting of three oxygen atoms.
• Ozone is a powerful oxidizing agent, far better than dioxygen.
• It is also unstable at high concentrations, decaying to ordinary diatomic oxygen (in about half an hour in atmospheric conditions)
• Ozone will oxidize metals (except gold, platinum, and iridium).

Ozone…
• Ozone in atmosphere :
“Good” ozone : on stratosphere
“Bad” Ozone : on surface
• Good ozone :
protect the earth from UVB
• Bad ozone :
dangerous for human health

How surface ozone can be created..??
Ozone on surface air, is not emitted directly into the air, but is created by a chemical reaction between nitrogen oxides (NOX) and volatile organic compounds (VOCs) in the presence of heat and strong sunlight.

Pollutants that cause ozone come from motor vehicle exhaust, industrial emissions, gasoline vapors, chemical solvents, and vegetation.


How Does "Bad" Ozone Affect Human Health and the Environment?
• Inhaling ground-level ozone can damage lung tissue and irritate the respiratory system.
• It can aggravate asthma and other respiratory diseases, reduce lung function, and inflame and damage lung tissue.
• Ground-level or "bad" ozone also damages vegetation and ecosystems.

How Does "Bad" Ozone Affect Human Health and the Environment?
• It leads to reduced agricultural crop and commercial forest yields.
• Reduced growth and survivability of tree seedlings, and increased susceptibility to diseases, pests and other stresses such as harsh weather.
• Because ozone forms in hot weather, anyone who spends time outdoors in the summer may be affected.

Index ozone level
• The United States Environmental Protection Agency (EPA) has developed an Air Quality index to help explain air pollution levels to the general public.
• Eight-hour average ozone concentrations of 85 to 104 ppbv are described as "Unhealthy for Sensitive Groups“.
• 105 ppbv to 124 ppbv as "unhealthy“.
• 125 ppb to 404 ppb as "very unhealthy".

Surface Ozone Characteristics
• Surface ozone concentration increases during the day when UV light and human activities increases too.

Ozone as a greenhouse gas
• The increase in ozone is of further concern because ozone present in the upper troposphere acts as a greenhouse gas, absorbing some of the infrared energy emitted by the earth.
• Quantifying the greenhouse gas potency of ozone is difficult because it is not present in uniform concentrations across the globe.
• The scientific review on the climate change (the IPCC Third Assessment Report[22]) suggests that the radiative forcing of tropospheric ozone is about 25% that of carbon dioxide.

Conclusion..
• Surface ozone is a dangerous pollutant because it damages human health, agricultural, and ecosystem.
• Surface ozone become one of the green house gases and contribute to the climate change of earth.
• Concentration of the surface ozone depens on the UV light, human activities, the area, the population, and the season.

Sporadic - E

By Varuliantor Dear



A study upon real sounded ionosonda data

Background & Purpose
• Why this phenomenon called sporadic when it is practically a daily occurrence ?
• To know the behavior of E-Sporadic phenomenon by using the ionosonda data

How to read Ionogram
• E and Es different by 150 kHz
• Auto scaling make some mistakes
• Some times the data reduced by the ionogram axis

How to grouping data
• Highest hourly foEs each month
• Highest daily foEs
• Hourly >= 5 MHz
• Daily >= 5 MHz
• Number of hours and days foEs>= 5 MHz

Summary of the result
• Grouping the result
• Certain behavior Es
• Have a similar trends in every years

People Opinion
• Varying Es density
• Sun Radiation Role
• The season contradiction
• Meteor influence

Conclusion
• Showing the E Sporadic occurrence
• E Sporadic behavior seemly have a yearly trends
• There is a lot of opinion about the occurrence E Sporadic

Senin, September 01, 2008

ROBOTS

By Ginaldi Ari



Human needs Help?
- Doing hard work
- Explore an unknown and unreach location
- Do many task simultaneously
- In security and safety
- Need friends of his own
That’s why human need them

Introduction
A robot is a mechanical or virtual artificial agent. It is usually a system, which, by its appearance or movements, made an activity that it has intent of its own.

a typical robot will have several of the following properties:
- can sense its environment, and manipulate or interact with things in it
- has some ability to make choices based on the environment, often using automatic control or a preprogrammed sequence
- is programmable
- moves with one or more axes of rotation or translation
- makes dexterous/skillfull coordinated movements
- appears to have intent or purpose


we can use them to do :
a. Help the process of surgery
b. Research Robot
c. Research robots :
d. Process Industry
e. As a helper, who knows you need a help
f. Or just having fun with them
Need a friend?

There are a lot of movies about robot :
a. Robots (Blue Sky Studio)
b. Transformer
c. I-Robot
d. Robocop
e. Terminator, etc

Robots Progress
- Sandia National Institute (USA) have built a 1/4 cubic inch and weighing less than an ounce mini robots, it is possibly the smallest autonomous robot ever created. Powered by three watch batteries, it rides on track wheels and consists of an 8K ROM processor, temperature sensor, and two motors that drive the wheels. Enhancements being considered include a miniature camera, microphone, communication device, and chemical micro-sensor.
- Honda engineers created ASIMO with 34 Degrees of Freedom that help it walk and perform tasks much like a human. One Degree of Freedom is the ability to move right and left or up and down. These degrees of freedom act much like human joints for optimum movement and flexibility.

Thank You

Selasa, Juli 08, 2008