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Hosted by Dr. William J. Frey
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Page 1: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

Hosted

by

Dr. William J. Frey

Page 2: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

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Safety and Risk

Educational Laptops

Bus and Nat Env

Therac-25

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Page 3: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

Row 1, Col 1

A thing’s risks are fully known and judged acceptable in light of accepted value principals.

What is safety?

Page 4: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

1,2

These laptops are designed for use by children in developing nations.

What are the MIT latops?

Page 5: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

1,3

The study of how living things—plants and animals—interact

with one another in the Earth’s unified natural system, or ecosystem.

What is ecology?

Page 6: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

1,4

The Therac-25 machine at thisinstitution was put back into

operation on April 7, 1986. Four days later, another patient com-

plained of burns.

What is ETCC or the East Texas Cancer Center?

Page 7: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

2,1

The scientific and exact process ofdetermining the degree of risk.

What is a risk assessment?

Page 8: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

2,2

Physical surroundings (like a classroom) enable or

instrument certain kinds of actionswhile they block or constrain

other kinds.

What is one way Socio-Technical Systems embody values?

Page 9: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

2,3

Development that “meets the needs of the present [generation] without compromising the ability of future

generations to meet their own needs.

What is sustainable development?

Page 10: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

2,4

A race condition produced demands which exceeded the

memory and processing capacitiesof the computer controls.

What was the central flaw in the design of the software controls developed for the Therac-25 machine?

Page 11: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

3,1

How people view risk dependson its voluntariness, the controlthey have over it, certain dread,

and unknown factors, and thebenefits they expect from it.

What is the Risk Perception?

Page 12: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

3,2

This court decision found thestate of Texas guilty of

inequitable education funding.

What is Edgewood Decision of 1967?

Page 13: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

3,3

In this view, the world’s resource base, the air, soil,minerals, and so forth, is

essentially finite, or bounded.

What is set forth by the notion of limited carrying capacity?

Page 14: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

3,4

Double pass electron accelerator, dual mode, and more computer

control.

What are three new features offered by the Therac-25 units over the previous 20 and 6 models?

Page 15: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

4,1

The potential that something unwanted and harmful may

occur.

What is risk?

Page 16: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

4,2

Laptops allow for digitalizing textbooks, graduating

computer-literate students, and solving the digital-divide.

What is were advantages cited for the Texas Laptop project?

Page 17: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

4,3

This term refers to the amount of land and water a human

population needs to produce the resources it consumes and to absorb

its wastes, given prevailing technology.

What is the ecological footprint?

Page 18: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

4,4

This presented a serious obstacleto identifying and solving the

central problem in the Therac-25 Case.

What is the lack of communication between stakeholders on the operational history of the Therac-25 unit?

Page 19: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

5,1

“Subjects, to the degree that they are capable, [should] be given the

opportunity to choose what shall or shall not happen to them.”

What, according to the Belmont Report, is informed consent?

Page 20: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

5,2

Instead of properly disposing of spent laptop and desktop computers, many so-called re-

cycling companies send these parts to developing nations where valuable metals

are mined and the other parts carelessly cast into dumps, irrigation canals, and rivers.

What is exporting harm?

Page 21: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

5,3

Three hundred million of thesebecome obsolete every year, making

this the fastest-growing part ofthe waste stream.

What is electronic waste?

Page 22: Hosted by Dr. William J. Frey 100 200 400 300 400 Safety and Risk Educational Laptops Bus and Nat Env Therac-25 300 200 400 200 100 500 100.

5,4

New responsibilities delegated tothe software controls in the

Therac-25 model.

What are monitoring machine status, accepting treatment input, and setting up machine for treatment?


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