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Cryptographie - partie 1 : chiffrement de César (Vidéo)

Chapitre "Cryptographie" - Partie 1 : Le chiffrement de César

Plan : César a dit... ; Des chiffres et des lettres ; Modulo ;
Chiffrer et déchiffrer ; Espace des clés et attaque ; Algorithmes

Exo7. Cours et exercices de mathématiques pour les étudiants.
Retrouvez le polycopié sur http://exo7.emath.fr


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Facing down Facebook
Dr Omar Merlo, a University Lecturer in Marketing and Strategy, says Facebook and other new media tools bring with them new risks for brand management. The challenge is identifying, and immediately responding via the right channels, if they threaten your reputation. YouTube and Facebook users, he says, have changed the face of marketing forever.
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1.6.5 E. Worker as institutional reformer

The problem for young people is the way they are excluded and oppressed by the main institutions of society. Few are really listened to at school – and certainly not about how they could be better taught. Many are oppressed by the forces of law and order – and even by local community groups who are threatened by often harmless if boisterous behaviour. The job market wants to slot them into dead-end jobs. The doctors often treat them as appendages of their parents. These institutions need
Author(s): The Open University

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Nature?s Fair Share: Ecosystem Needs and Benefits in the Lower Colorado River and Delta
Karl W. Flessa - Nature?s Fair Share: Ecosystem Needs and Benefits in the Lower Colorado River and Delta
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Do Women Make Good Political Leaders? [Audio]
Speaker(s): Baroness Williams | Shirley Williams is a former Labour cabinet minister and one of the Gang Of Four who left Labour to start the Social Democrats.
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Questions relating to Figure 11

The following OD450 values were measured from serum samples taken from three babies: 0.12, 0.40, and 1.74.

SAQ 7

Virtual Maths - 3D shapes, diagram, area, volume
Diagram of 3D shapes with formula for calculating area (and volume)
Author(s): Leeds Metropolitan University

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http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Acknowledgements

Grateful acknowledgement is made to the following sources for permission to reproduce material in this course:

The content acknowledged below is Proprietary and used under licence (not subject to Creative Commons licence). See Terms and Conditions.

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Carnivorous Plants of Texas
This video adapted from Texas Parks and Wildlife Department explores the bizarre world of carnivorous plants. More than 400 species of plants evolved structures and strategies for capturing, killing, and digesting insects and other creatures to satisfy their need for a scarce nutrient. This video highlights two types of carnivorous plants common to bogs of the southern United States. (2mins)
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Veggie Tales Part 3/5

In this show, Bob the Tomato interviews Abraham and Sarah about how they waited years and years (you know they loved that) for the child promised to them by God.  Junior Asparagus joins in as the film crew records the int
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Conclusion

In this course you have found out that:

  • The sensation of pain is caused by the release of a chemical (prostaglandin) that stimulates the nerve endings and sends an electrical message to the brain.

  • Pain can be reduced if the formation of prostaglandin can be inhibited.

  • Prostaglandin is formed, from arachidonic acid, in a cavity in the active site of the enzyme cyclooxygenase (COX).

  • Geometrical isomerism can b
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5.3 Settlement, deforestation and endangered species

Box 4: Some indicators of New Zealand's environment*

The proportion of New Zealand converted to farmland is large by world standards (52 percent compared to the world's 37 percent in 1993). Although our human population density is comparatively low (13 people for each square kilomet
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"The Water Drop" on Vimeo
This is a short film of a water droplet using very sophisticated cameras so the end result is very unique.  This would be a great brain-break and can be used to compliment the Common Core Test Exemplar Follow the Water From Brook to Ocean. (0:50)
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CSET Science Subtest I: Forces and Motion

The University of California, Irvine Extension, supported by generous grants from the William and Flora Hewlett Foundation and The Boeing Company, is developing online courses to prepare science and mathematics teachers for the California Subject Examinatio
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4.1.2 The network

The network is a communication channel in that it conveys data from the transmitter to the receiver. The network may also manipulate data in some way, and it may also store or retrieve data.

In a mobile phone system, the network conveys the message from User l's handset to User 2's. It will also store the identity of User 1 and the duration of the call. This data is used to work out the amount to charge User 1, which is a form of manipulation of data. A network can be very comple
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Nicolas Ghesquiere debuts for Louis Vuitton
Subscribe: http://smarturl.it/reuterssubscribe More Lifestyle News: http://smarturl.it/LifestyleNews It's the final fashion show of the Fall 2014 runway season - and perhaps the most anticipated one. This is the first ever Louis Vuitton collection by fashion designer Nicolas Ghesquiere. Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financial, national, an
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Base pairing

Nucleic acid folding patterns are dominated by base pairing, which results from the formation of hydrogen bonds between pairs of nucleotides. In nucleic acids, as in proteins, the highly directional nature of this hydrogen bonding is the key to secondary structure.

SAQ 5

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Kookles lasagne : Stappenplan
lasagne.jpg

Dit is een visueel stappenplan met foto's en korte zinnen om snel lasagne te maken.


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Using Tensegrity and Folding to Generate Soft Responsive Architectural Skins
This paper describes the process of designing a prototype for a soft responsive system for a kinetic building facade. The prototype uses lightweight materials and mechanisms to generate a building facade skin that is both soft (less dependent on hard mechanical systems) and responsive (dynamically and simultaneously adapting to spatial and environmental conditions). By combining concepts stemming from both tensegrity structures and folding mechanisms, we develop a prototype that changes dynamica
Author(s): Abdelmohsen, Sherif, Massoud, Passaint and Elshafe

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3.1.2 Star clusters and stellar evolution

  • Since all the stars in a cluster formed at about the same time, and all have similar compositions, they provide a powerful tool for the study of stellar evolution.

  • The lack of massive stars lying at the top of the main sequence in clusters indicates that they evolve fastest. The ages of clusters are inferred from the position of the main sequence turn-off.


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