Indices o INDEXES
Un ndice es un arreglo ordenado utilizado para acceder lgicamente filas de una tabla.
A partir de un punto de vista conceptual, un ndice se compone de una clave de ndice o
index key en ingls y un conjunto de punteros. El index key es, en
Para que una entidad sea debil debe cumplir con las siguientes condiciones:
1. La entidad es la existencia dependiente; es decir, que no puede existir sin la entidad
con la que tiene una relacin.
2. La entidad tiene una clave principal q
Lecture 03: Early Technology (continued)
Throughout prehistory and history digging and moving soil and rock have been very important
activities. I'm not talking about mining here, we will cover that separately.
Some societies built mounds. The
Notes for Session 04 (Early technology, continued)
The Sumerian wrote on clay because that's what they had. As we will see next week that's almost all
they had. The Mycenaean Greeks also wrote Linear B on clay tablets, perhaps because th
The scale of ancient technology (continued)
Last time I showed you a series of technological revolutions that occurred over the last thousand years
and I pointed out that technology persists and spreads much more readily than other aspects of culture.
Session 01 Introduction
[See course outline on cuLearn for discussion of the course itself.]
The scale of ancient society
Geographical scale: the Roman Empire
The Classical world operated on a much larger scale than people generally realize. Probably are
1. State the 1st and 2nd Laws of Thermodynamics.
The first law of thermodynamics states that energy can not be created or
destroyed, yet, it can be transformed/trasnferred in any transformation from one to the
other and the total energy remains.
1. Describe the use of the eCar in terms of energy transformations.
Traditional cars use fossil energy to power, however, electronic cars use electricity.
which this is a energy transformation from fossil fuel to electricity.
2. What is a system?
1. Why is there a move to smart grids?
There is a supply&demand of charing eCar battery.
2. What are the components of the electrical energy system?
Generation, transmission, distribution and consumer.
3. What are 3 types of energy storage (give an exampl
1. What are the 4 risk management strategies suggested by Dorfman? Give an example of each
Transfer: Insurance to contracts
Avoidance: not performing an activity that caries risk, not flying in airplane to
avoid hijacking risk
Risk Reduction: meth
1. What is the difference between a resource and a reserve?
Resource is the untouched because of the poor quality it has. Yet the reserves is
the core of a resource that needs to be examined and might have economic value.
2. Along with fracking, developme
1. In your own words, explain how the Namibian desert beetle can get water from the
The water sticks to the peak of each bump, because the bump is smooth and like
glass which attract water. and the cover to forming the drop of water, and when
1. What is the difference between the way the USGS and the IEA see peak oil?
USGS sees supply and demand,in the supply chain, it start from supply then peak
oil and peak production. Yet, in the demand, it demands growth continues indefinitely
and last oil
1. How do views of environmental risk differ among the four myths of nature?
Nature capricious: need nor resources controllable
nature perverse/ tolerant; need are not but resources are controllable
nature benign: nature is stable/global equilibrium but r
1. Explain what moral standing is.
Moral standing is for an ethics to have moral standings, its interests and wellbeing must be considered when deciding what to do.
2. Is there a connection between moral standing and sustainable development? Explain.
1. What are the 5 distinct elements of a passive solar building?
Aperture (window, collector), Absorber (dark material to absorb solar radiation,
Thermal mass, Distribution, Control.
2. What 4 things do you need to have forest fires?
Drought, sources of i
Mystery Person ! Hugh Green
" Combine Jane Jacobs & Robert Moses (freeways in NY; Long Island
Thermal Capacitance: ability of materials to store heat
Thermal Mass: materials that store heat; stores heat by changing temperature (the more
Thursday, February 25th, 2016
*Watched VIDS$GRIDS videos on YouTube*
o Contain anode, cathode/electrolytes
o Different kinds of batteries
! Primary: cannot be recharged
! Secondary: can be recharged