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Sjabloon voor SMS-gesprek
sms.jpg

Sjabloon van een gsm met tekstberichten. Laat leerlingen zelf een gesprek bedenken, geef leerlingen boodschappen door via deze weg,....


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3.1 Introduction

In mammals and birds, homeostasis, the provision of a stable internal environment, includes keeping certain physiological variables, T b, cellular and extracellular water and blood glucose at near constant levels. T b of reptiles varies with T a, but reptiles can only function over a limited range of T b. Nevertheless, vertebrate species live successfully in deserts, which are arid, have low productivity and extremes of <
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22.314J Structural Mechanics in Nuclear Power Technology (MIT)
This course deals with structural components in nuclear power plant systems, their functional purposes, operating conditions, and mechanical-structural design requirements. It combines mechanics techniques with models of material behavior to determine adequacy of component design. Considerations include mechanical loading, brittle fracture, in-elastic behavior, elevated temperatures, neutron irradiation, and seismic effects.
Author(s): Kazimi, Mujid S.,Buyukozturk, Oral

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

6.1 Introduction

The biological functions of both DNA and RNA are dependent on complex, and sometimes transient, three-dimensional nucleoprotein structures. It is in such structures that the enzymatic manipulation of DNA in the essential biological processes such as DNA replication, transcription and recombination occur, and it is important to understand the interactions that drive these processes. Whether it is the activity of enzymes associated with DNA, such as DNA topoisomerases, or the packaging of DNA o
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5.3 Summary

The term phase is used to refer to the part of a cycle that an oscillating system is in at a particular moment. For two sine waves of the same frequency that are not in step, one wave lags or leads the other in time. We can express the amount by which they are out of step as a phase difference. Usually phase difference is expressed as a fraction of a cycle or as a certain number of degrees (one complete cycle corresponding to 360°).

If two (or more) sine waves are completely out of pha
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Energy resources: Water quality
Water is arguably the most important physical resource as it is the one that is essential to human survival. Understanding the global water cycle and how we use water is essential to planning a sustainable source of water for the future. In the UK there are areas where water supplies are limited, shown by recent droughts. Globally, there are many areas that do not have enough water to support the current population adequately. Decisions will have to be made on the best way to use water in a wo
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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Professor David Coley inaugural lecture: Are buildings evil?
In this inaugural lecture, Professor David Coley from the Department of Architecture and Civil Engineering will address why so few buildings in the UK are built using the low-energy technologies that are now available.
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Les limites du système biosphère : les enjeux globaux (Vidéo)

Dans ce cours, Dominique Bourg présente les neuf grandes perturbations environnementales en s'appuyant sur les travaux de Johan Rockström.


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7.2 Operating systems

You have already seen that operating systems organise the sharing of resources. But they do much more than this; they ensure the efficient running of a computer by:

  • loading application programs from secondary memory into main memory and managing their execution;

  • supporting application programs by managing their use of the computer's resources;

  • managing the storage of programs and data in secondary memory;

  • ac
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Japanese Words of the Week with Risa for Beginners #22 - Clothing Accessories
In this Beginner lesson, you’ll learn Japanese words about Clothing Accessories. Visit us at JapanesePod101.com, where you will find Japanese lesson notes and many more fantastic lessons and learning resources. Leave us a message while you are here! Learn Japanese with JapanesePod101.com! How would you react if someone put you on the spot with a [...]
Author(s): JapanesePod101.com

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Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions) and is used under licence.

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

The content acknowledged below is Proprietary and is used und
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Battle of Britain Newsreels - World War II
Battle of Britain is the name commonly given to the effort by the German Luftwaffe to gain air superiority over the Royal Air Force (RAF), before a planned sea and airborne invasion of Britain (Operation Sealion). This video contains black and white newsreel footage from 1940 and 1941 documenting the air battles.

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The science of breakfast in weight management and health
In this lecture, Dr James Betts from the Department of Health will examine the importance of eating breakfast for overall good health, and whether missing breakfast could increase a person's risk of becoming overweight or suffering from heart disease or diabetes.
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Absolute Beginner Japanese for Every Day #11 - 10 Phrases You Always Want to Hear
Learn Japanese with JapanesePod101.com! In your home country, there are some phrases that are so common you use them or hear them every day. The same is true in Japan too, so why not give your Japanese an instant boost by learning them in this video lesson? With Risa’s help, you’ll be sounding like a [...]
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5.9.2 Ultrafiltration (UF)

This employs membranes with smaller pores (0.001–0.02 μm) than those for microfiltration and utilises much greater pressure (up to 3000 kPa). An atomic mass unit is 1/12 of the mass of a neutral atom of the most abundant isotope of carbon, i.e. I.66X 10−27 kg.

Commonly, the membranes are made of polysulphone, polyacrylonitrile, polyamide and cellulose acetate. Inorganic ceramic membranes are also used. Owing to its ability to remove very small particles, UF is mainly use
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1.5.3 The doctor-nurse relationship

In reality, however, the nurse spends much more time with patients and often knows a lot that the doctor does not. Somehow the nurse needs to be able to communicate essential knowledge to the doctor, in the patient’s presence, without appearing to undermine the doctor’s ‘omniscient’ status. According to Leonard Stein’s research in America, they achieve this through playing ‘the doctor–nurse game’.

T
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1.5 Accountability

Social workers have to act within the law and can be called upon to justify their actions to courts and managers as well as to service users. The law can define a worker's accountability in some detail. Furthermore, service users have a right to complain. Social workers are also employees and thus can be called upon to justify their actions to their line management and agency; this will be outlined by their agency requirements.


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1 The desert climate: An introduction

If you have visited a desert you will have noticed the sparse plant cover, or in certain sandy deserts, the almost complete absence of plant life. The low productivity of deserts derives from their defining feature, which is aridity. Scarcity of water restricts the diversity and amount of plant cover, and in turn the diversity and abundance of animals. However, if you were visiting one of the American deserts after rains, you would be rewarded by the sight of the desert ‘in bloom’, as vas
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The ARCH: A Home Away From Home
Penn Celebrates 'Reinvigorated' ARCH, A New Hub For Student Life On Thursday, Feb. 6, the Penn community gathered to celebrate the re-opening of the ARCH, Penn's Arts, Research, and Culture House. The open house marked the completion of a $24.5 million renovation transforming the historic late-Gothic Revival building at 3600 Locust Walk into what President Amy Gutmann called a "welcoming and central hub for all students to meet and share ideas" and a "beacon of undergraduate cultural and res
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2.6.1 course summary

  1. Laws summarise regularities observed in Nature. They can summarise large numbers of similar phenomena and make it possible to predict the course of particular phenomena.

  2. In physics, many of the laws are expressed mathematically and concern measurable quantities. This aids precision and clarity, and it supports rational argument.

  3. Newtonian mechanics is based on equations (Newton's laws of motion, Newton's law of universal gravita
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