SSI3013: Information And Communication Technology In Sciences

En. Azmi Bin

ibrahim

SHAFIQ FAIZ

STELLAStella is a systems thinking for education and research. It’s offers a practical way to dynamically ,visualize and communicate how complex systems and ideas really work whelter they are first time or experienced modelers, teachers ,students and researchers use Stella to explore and answer endless question.

•How does climate change influence an ecosystem over time?•Would Hamlet’s fate have changed if he’d killed Glaudius earlier?• How do oil prices respond to shocks in supply and demand?•What will happen when the ozone layers is gone?•How do basic macroeconomic principles affect income and consumption?

Easy-to-use, Stella models model provides endless opportunities to explore by asking “What it” and watching what happens , inspiring the exciting moments of learning. Thousands of educations and researchers have made Stella the gold standard , using it to study everything from economics to physics. Literature to colours , chemistry to public policy ,college and researchers communities all recognized Stella’s unique ability to stimulate learning.

Stella models allow you to communicate how a system works, what goes in , how the systems impacted ,what are the outcomes . Stella supports diverse learning styles , with a wide range of storytelling feature. Diagrams ,chart and animation help visual learners discover relationships between variables in an equation . Verbal learners might surround visual models with words or attach document to explain the impact of a new enviroment policy. Example

ADVANTAGES

Shorter development

cycle for each model

Very readable code

Standardized features often

needed in modeling

Much assistances

in model verification

DISADVANTAGES

Additional training required

Higher software cost (up-

front)

Limited portability

BUNGEE JUMPING VIRTUAL

INTRODUCTIONBungee jumping is relatively new sport. The jump it self is related to the

ritualistic practices of “land divers” from the Pentecost Island in the Pacific Archipelago of Vanuatu . These men demonstrated their courage by jumping off cliffs while attached to vines ; they do this in hope of a plentiful harvest of Yams. In 1997 ,the Oxford University Dangerous Sport Club jumped off a bridge themselves after being inspired by a film about the vine jumpers. During the 1980’s ,the sport flounshed in New Zealand and Frances and was brought into the United State by John and Peter Kockelman of California. In the early 1990’s facilities sprang up all over the country with cranes ,towers and hot air balloons serving as platforms

I use the software Stella from isee systems to model a bungee jump. Bungee Jump is a simple Harmonic Motion , having many component with relationship. For example , student can use Stella to model the bungee jump the relationship between the mass , the displacement and the gravity and strands in bungee cord.

The intent of the project is to develop an understanding of the mathematics and physics involved in determining the motion of a person bungee jumping from a platform a certain height . Newton’s second law of motion which is for every force there is an equal and opposite reaction .

Hooke’s law which is related to the elasticity of the bungee cord , some of the basic laws of physics such as force which in this case referred as gravity, different approximations of nation for the jumper. The free fall of the jumper , as well as the damped harmonic motion during the influences of the bungee cord , will be analyzed . The effect of height , mass ,gravity and elasticity of bungee cord is included in this stimulation.

VIRTUAL BUNGEE JUMP:INTERFACE

The background and context menu, this menu is telling us about the application of this experiment in daily life.The objective is to obtain the perfect bungee cord for chosen weight and gravity by neglecting the air resistance.

VIRTUAL BUNGEE JUMP: SIMPLE EXPERIMENT

Point A show that the length of the bungee cord initially which can be read at Point D column ( Altimeter reading ). Point B and C is a knob that uses to manipulated the weight of the bungee jumper (load attached to bungee cord ) and strands of the bungee cord. Point D also show three column which can be change it unit of measurement by double clicking the column. Point G is the button where student need to click if student want to start the experiment, while Point F is the button to click if student want to stop the experiment immediately at any point.

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The bungee jump is calculated graphically and the knob is added to four. Meaning in this Extended Experiment, you can manipulated more factors that effecting the bungee jump such as gravity, height of platform and strands in bungee cord.

This map it show all the relationship in physic view for bungee jump. With this, student can see clearly how the simulation take place. Starting from the height of platform is the calculation is displacement from platform measure by altimeter.

This graph show the real equation and calculation in the bungee jump virtual simulation. In this part student can change the title, time, equation, graph and unit of the bungee jump virtual model.

Student can change the name, value of knob, words, and anything that related to the knob in the Extended Experiment or Simple Experiment. Same as other button function.

Conclusion

The physical and computer models are dynamic. The students can see what happens when a rainfall event occurs and understand the role of retention/detention ponds in reducing flash flooding and sediment pollution. It is rare that dynamic phenomena can be seen in the field. Video and slides frequently do not convey the dynamics of natural and anthropogenic processes, in part because they are not interactive.

Thank You