Glow Essay Example for Free

Glow Essay Investigation of the effect of cold temperatures on the lasting time of glow sticks. Aim: to investigate whether freezing a glow stick will affect its longevity. Hypothesis: The glow sticks will last longer when they are frozen than when they are at room temperature. Background information: Glow sticks are made of hydrogen peroxide, a phenyl oxalate called ester, and phosphorescent dye. The ester and phosphorescent dye are kept in one part of the glow stick, the hydrogen peroxide in the other, separated by a piece of glass. No chemical reaction occurs until the glass breaks, combining the chemicals together inside the tube. Cooling a glow stick slows the reaction a slightly and causes it to last longer, but the light is dimmer. This can be demonstrated by freezing an activated glow stick. When it is reheated, it will begin to glow again. However, if the chemical reaction has already occurred and the glow stick has already gone out, freezing the glow stick will not cause it to begin glowing again. A high quality glow stick will last 8-12 hours, provided there is no otherwise interference. It will glow faintly for about one day after this time period is over, however the primary glow will have gone out. Other factors, such as the color of the glow stick (Green, yellow and orange are the brightest colors and therefore last the longest. ), the previous treatment of the glow sticks (Sometimes, a glow stick will have been accidently activated by being knocked over or bumped before the activator intends to, meaning that the chemical reaction may have already occurred by the time it is intended to be activated. ) and the amount of light they are exposed to and for how long. (Being hit with direct light damages the glow stick, lessening its longevity. )

Nuclear Power Versus Renewable Energy

Nuclear Power Versus Renewable Energy One of the biggest problems that we face in todays modern power hungry times is the decision on a single source of power. As we continue to consume as a society we are very quickly burning through our supplies of fossil fuels to the point at which in a couple of decades we will have all but exhausted existing supplies. It is for this reason that decisions need to be made on what source will generate future generations electricity. The future of energy production will lie with the criteria set out by fossil fuel energy production and how well they fit these criteria. Any new fuel source will have to be readily available and provide a constant supply of energy; it will need to be cheap and safe to produce; the same or fewer emissions than that of fossil fuels, although with todays current eco standards the later will probably need to be true. One particular source of energy seems the logical choice for the main replacement for fossil fuels and that is nuclear power, but how do other more renewable sources of energy compare to nuclear power? In 2002 it was reported by an MIT study that nuclear power supplied 17% of the worlds electricity consumption [1] and if this is compared to renewable sources such as wind power, geothermal and biomass generators which accounts for just 19% as calculated in 2008 [2]. The aim of this paper is to compare and contrast the viability of different energy sources for the future. What is nuclear power? Nuclear power in its current state is the controlled fission of radioactive material for the generation of electricity. Nuclear power uses Uranium primarily as a fissible material, the first safety issues come from obtaining a source of uranium that is viable to use for energy generation. Uranium occurs naturally in a compound ore form, comprised of 99.3% U238 and 0.7% U235 [3]. Uranium 238 is not a suitable isotope for fission, infact in its natural ore it prevents the uranium from sustaining any sort of nuclear reaction. This can be explained by the energy of absorbed neutrons in the nuclear material, U235 will undergo fission at all energies of neutrons, but U238 will not. To overcome this problem, uranium ore needs to be enriched with a higher percentage of U235 (usually so that U235 comprises 3% to 5% of the ore [3]). The enrichment process introduces safety issues that are not present in other forms of energy production, the process produces uranium hexafluoride that is a highly toxic chemical that is difficult to store due to its corrosive nature. The main waste product is depleted uranium that the radioactive waste from extracting U235 from natural Uranium ore. There has been much controversy over Depleted uraniums use as a weapon and its difficulty in being stored due to its radioactive nature, current estimates put global stockpiles of depleted uranium at 1.5 million tonnes [3]. The generation of power from radioactive sources makes use of a compound nuclear reaction. Neutrons are absorbed by enriched uranium, usually a uranium ore composed of mainly U235, which forms an excited compound nucleus. A compound nucleus will be inherently unstable and result in the fission of the excited compound nucleus and emission of two new nuclei and neutrons. Figure 1 illustrates a possible nuclear reaction inside a nuclear reactor: Figure 1- Example of nuclear reaction. n+U235 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ U*236 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Xe139 +Sr95 + 2n As can be seen from figure 1 the example fission reactions require a single neutron to induce fission of U235 but the final products of the reaction include 2 neutrons which allows the reaction to become self perpetuating, this neutron feeding process is known as a chain reaction. This chain reaction will only occur in enriched uranium. Nuclear power is generated using two different types of reactor that both have their merits and faults with regard to safety: The fast reactor is a reactor based on an equal mix of Uranium 235 and 238 that can sustain the chain reaction required to generate energy. Fast neutrons, hence the name, sustain the reaction, in the case of the fast reactor neutrons interact with U238 whicch forms a nucleaus that does not under go fission but forms plutonium 239 instead. Although Pu 239 is able to undergo fission, it does not do so at the speed required to sustain the chain reaction and infact most of it becomes unused waste in the form of spent fuel. The fast reactor is designed to navigate around this by using the fast neutrons to produce more fissile Pu239 than spent Pu239 by not using a moderator to slow neutrons down this reduces the problem of producing lots of unused fuel as waste. Because this type of reactor does not use a moderator to control neutrons and due to the highly fissile material in the reactor core, it does require an efficient cooling system which does introduce certain safety issues. Fast reac tors require a liquid sodium coolant, chosen due to its highly conductive nature, to remove heat from the core. The use of sodium though has its associated risks because its highly reactive and becomes corrosive when reacting with air which is obviously a problem when surrounding a radioactive core. Thermal reactors use enriched uranium to produce energy instead of an equal mix and the enrichment produces the waste products as discussed earlier. Unlike fast reactors which do not use moderators thermal reactors, and the ones in question use a moderator and coolant. In the case of Pressurised water reactors and boiling water reactors they both use water as a coolant and moderator due to waters inherent property that it is a good neutron absorber. The water based thermal reactors are one of the most widely used nuclear reactors due to the availability and safety of the coolant and moderator. There are contamination risks with the boiling water reactor, as water is pumped through the reactor and boils it will pick up fragments of radioactive contaminants which could be released into the atmosphere via the cooling towers. For note the worlds largest nuclear power plant uses 7 different boiling water reactors to generate electricity and is capable of generating a total of 8,212MW and a typical fossil fuel turbine is capable of generating 1000MW so a typical fossil fuel plant can be compared to outputting a similar amount of energy to that of a nuclear power plant [3b]. Safety of Nuclear Power With the explosion of the Chernobyl nuclear power plant and the recent meltdown risks of the Fukushima reactors safety concerns are always inherent when discussing nuclear power. Meltdowns are often a buzz word when associated with nuclear power plants and is often the biggest safety concern when considering nuclear power, but what exactly is a nuclear meltdown? A nuclear meltdown is not as serious as the word suggests or as the world media have suggested. A meltdown will occur when there is more heat inside the reactor core than that being removed by any coolant mechanism that are put in place. If this does happen then the nuclear fuel will literally melt causing it to melt through the reactor. This will result in damage to the reactor core and a possibility of the fuel escaping the reactor, but nuclear reactors are contained within a containment structure that is designed to prevent any radioactive material from contaminating the atmosphere and allowing coolant to be pumped into the structure. This only becomes an issue when the containment structure is damaged as was the case during the Fukushima earthquakes, with the exception of natural disasters modern nuclear power plants are designed with the up most safety in mind and have many different precautions in place to prevent and exposure and risk to the general public. Control rods are one of the best designed safety features within a nuclear reactor, they are designed to avoid any rapid increase in reactor core temperatures. When fuel temperatures rise to a temperature at which coolant will be contaminated and need to be ejected, the control rod safety mechanism kicks in. They are designed to slow the neutron flux with in the reactor, much like the moderator does, and hence slow down the rate of energy generation so that coolant can carry heat away without the risk of contamination. Systems are in place so that this precaution is activated immediately when any reactor threat is detected. This safety measure reduces the risk of any radioactive material being ejected via cooling systems. In fact studies suggest that exposure to radioactive sources due to nuclear power stations and nuclear fuel plants are less than 0.1% of human annual exposure to radiation, this can be seen from figure 1. So although there is a high chance of radioactive contamination the safety mechanism that are in place prevent this risks from occurring and keeping exposure down to a minimum. Figure 2- Figures showing annual sources of radiation exposure [4] With this in mind although there are danger risks when considering nuclear fuel as a replacement for fossil fuels, the number of design features installed to prevent this is more than adequate to ensure the safety of the technology. Proliferation concerns One concern with Nuclear power is not the safety risks of the power station or the waste they produce but instead that enrichment facilities can produce Uranium that is enriched for use in nuclear weapons. This is much a concern in the developing world where governments are not as stable and it would not take long for a fuel enrichment facility to start producing weapons grade uranium. Renewable energy sources So far we have looked at some of the pros and cons of nuclear power and it seems like a viable alternative to fossil fuels, but technological advances have allowed renewable energy sources to become a viable option for industrial production of energy. Renewable sources of energy cant produce energy on the scales that nuclear power plants can but they do not suffer from the contamination complications that nuclear power does. Solar power Solar power exploits natures biggest source of energy the sun, which outputs a massive 3.8410^26W [5] of which we receive 1.7410^17 W or 1.366kW/m^2 [6]. This is a huge amount of energy to exploit and an obvious choice for renewable energy because the sun is expected to remain in the sky for the next four and a half billion years. This seemingly perfect candidate for energy production seems relatively unused as solar power accounts for just 0.9% [7] of worlds energy production. One of the main issues with solar technology is the photovoltaic cell, this being the standard solar panel technology, it has a relatively low efficiency and as a result the amount of energy outputted does not represent the full potential from the energy put in, also with the sun being an intermittent energy source, the only way photovoltaic cells can produce energy at nights is with the use of large banks of batteries, which are expensive and an environmental hazard. There are seemingly new technologies creeping into the solar market, much simpler than the photovoltaic cell and much more efficient. One such technology is the solar tower. The solar tower uses a large field of heliostats which are mirrors that track the sun to focus the suns light on a single point which is a central tower. The central tower uses the heat supplied to drive a steam turbine capable of generating between 10 and 100 MW (dependant on the number of mirrors), for example the PS10 solar power plant in Spain uses 624 heliostats to generate 11MW and is still being constructed[8]. This may seem like a small amount of energy but a larger area solar power tower could provide much more energy, by increasing the area of the plant, by increasing the number of heliostats. One such project is currently under way in the Mojave desert which covers 4000 acres and aims to generate enough electricity to power the city of San Francisco [9]. Unlike Photovoltaic cells solar power towers hav e the capability of producing energy at night. When the suns energy is focused on the central tower some of the heat which is used to drive the turbines is also used to heat salts to molten temperatures in excess of 200 C, molten salts can keep their temperature very well if insulated properly, and when required can be pumped through the turbine to generate steam to generate electricity [10]. Given enough time Solar power could become a replacement for fossil fuel energy production, but in the meantime it suffers from high initial costs, a large carbon footprint and a lack of backing. Currently Spain appears to be the pioneers of this technology and have already constructed numerous solar power towers including PS10 as discussed earlier. Wind power One by-product of the suns energy that has yet to be mentioned is that it supplies energy into the atmosphere causing temperature and pressure differences, this produces a bulk movement of air molecules resulting in the wind. The wind is a much more exploited energy source compared to solar power, with wind power producing 2.5% of the worlds electricity[11]. Wind power generates electricity in a very similar manner to a conventional power generator, but instead of using water as a fluid to turn a turbine, the wind is the fluid that turns the turbine. Although there is a significant amount of power available in the wind not all of it can be extracted and a theoretical limit has been calculated for the amount of energy that can be [12]. This limit means that 59.3% of energy in the wind can be used for energy generation. In reality much less than this is extracted because wind is not a uniform medium and as such suffers from intermittency issues similar to solar power, in that wind is not a constantly accessible resource. Hydroelectric Power One already established form of renewable energy is Hydroelectricity, the generation of energy using the conversion of gravitational potential energy of falling water through a turbine. Its currently the 4th largest form of power generation behind coal, gas and nuclear power producing 20% of the worlds current electricity demands [13]. Interestingly though Hydroelectricity has been exploited in the 1st world, with almost all possible sites being developed for hydroelectricity, its only in the developing world where hydroelectricity could be utilized to improve renewable energy generation, this would explain why it is the 4th largest energy provider [13]. Unlike wind power and solar power, hydroelectric power does not suffer from intermittency issues. The idea behind a hydroelectric dam is that it uses the water at a higher gravitational potential to fall through a turbine generating electricity. When there is a smaller demand for electricity the flow rate can be reduced and the reservoir can be used to store excess water, this provides the dam with water on demand, which is a unique feature of hydroelectric power. Three gorges dam in china is a fantastic example of a 21st century hydroelectric plant, for reference it is capable of producing 22500MW [14] this is greater than 100 times the amount of energy produced by a solar power tower, and 5 times more energy than the largest nuclear power stations, so obviously hydroelectric dams are useful and utilizable replacement for fossil fuels. Hydroelectricity does have its environmental faults, and is probably the most hazardous of the renewable power sources. In order to construct a hydroelectric plan a large enough volume of water is required with a big enough drop for potential energy conversion to warrant building a hydroelectric plant. To do this a river must be dammed which upriver will flood a large area of land, this causes huge amounts of destruction to natural habitats, downriver there is a chance that drinking water is contaminated which has obvious human impacts. Conclusion on energy types We have discussed the different aspects of nuclear power and many different types of renewable energy sources. It is my opinion that despite certain renewable already being established they have still not reached their potential to replace fossil fuels, especially with certain intermittent issues and as a result are not ready to replace fossil fuels. On the other hand, while renewable sources develop into a more viable energy source nuclear power is ready to replace fossil fuels in the interim. If we compare energy production it would appear as if hydroelectric dams are the best option, but as discussed all sites in the developed world have been exploited and for comparison nuclear power stations are still being built as many possible sites still exist. Despite its safety issues and the non-renewable nature of nuclear fuel, nuclear power is capable of producing a steady supply of power that will meet demands upon request. In reality there is no one replacement for fossil fuels, as a society we have created a huge dependence on them and it is going to require a mixture of different power sources in order to develop a secure energy future and as a result our future probably lies with renewable energies and nuclear energies working in conjunction with each other. References 1. Deutch J.M et al, Future of Nuclear Power, An interdisciplinary MIT study, 2009, page 1. 2. El-Asjry M. et al, Renewable energy policy network for the 21st century, REN21, 2010, page 9. 3. Falk J. Bodman R.,Uranium Enrichment, Energy Science, November 2006, page 2. 3b. Power and technology, Full statistics of turbine energy generation, http://www.power-technology.com/projects/kashiwazaki/, accessed 16 April 2011. 4. Nuclear safety, The institution of engineering and technology, 2006, page 3. 5. Zeilik M. et al, Introductory Astronomy and Astrophysics, Saunders college publications, 1992, page G-11. 6. Wilson R. C., and Mordvinov A. V., Secular total solar irradiance trend during cycles 21-23, Geophys. Res. Lett, 2003, page 1199. 7. Wirman C., Electrical power annual: generation, US energy information administration, 2009, page 3. 8. Garcia-Sobrinos G., Tower of Power, Civil engineering, 2009, page 42-49. 9. Zook D., County supervisor concerned by Brightsource Mega Solar Project Impacts calls for a full review, Best Syndication News, 2011. 10. Barth D., Development of a High Temperature, Long-Shafted, Molten-Salt Pump for Power Tower Applications, Journal of Solar Energy Engineering, 2002 11. Ragheb M., Wind Power Systems:Harvesting the Wind, College of Engineering University of Illinois, 2011. 12. Gijs A.M. van Kuik, The Lanchester-Betz-Joukowsky Limit, Wind Energy Journals, 2007, 10:289-291 13. Hydropower and the Worlds Energy Future, International energy agency publication, 2000, update 2009. 14. Fabian A., Taming the Yangtze, IET publications, 2009.

Child Development Case Study Essay -- Child Development Theory

From the video observation, the two three-year old children, Thomas and Riley set off on a bus journey along with their childminder; it is observed that both the children speak about their journey, in which they are able to identify various features, which include the passengers; various buildings and different types of buses. Both children observe many of the features by taking photographs to highlight what they have observed on their journey. From observation, the video looks at the way the childminder plans the experience from a child-initiated stance, which directs the children’s learning in addition with assisting them with role-play and symbolic play, which is shown towards the end of the video. Thus, this essay will focus on the importance of early physical development within the Early Years framework, as well as the influence of the family with reference to the children along with the childminder. I shall link theory to practice from observation, by recounting both the boy’s bus journey, using a number of hypothetical methods, as well as emphasising the social and emotional development equally with cognitive development. However in particular, I will address the cognitive development, by doing so, a whole approach is required regarding both the children’s development, as children are seen as individuals and that each area of their development cannot be divided into different sections. So in order to accentuate the whole approach, it is imperative that the two boy’s development is seen from a holistic perspective. Furthermore, not only does the children’s development depend on their own developmental process, additionally the family, as well as the child minder will have an influential effect on the relationship of both ch... ...Early Childhood. 2nd ed. London: SAGE Publications. Bruner, J. (1986) Actual Minds, Possible Worlds. USA: Harvard University Press. Department of Education (Dcfs) (2010) it’s child’s play Early Years Foundation Stage [online]. [Assessed 7 December 2010]. Available at: . Keenan, T. and Evans, S. (2009) An Introduction to Child Development. 2nd ed. London: SAGE publications. Malim, T. and Birch, A. (1998) Introductory Psychology. London: MACMILLAN Press. Penn, H. (2008) Understanding early childhood. 2nd ed. Berkshire: Open University Press. Piaget, J. and Inhelder, B. (1969) The Psychology of the Child. London: Routledge. Smidt, S. (2007) A Guide to Early Years Practice. 3rd ed. Oxon: Routledge. Woodhead, M and Oates, J. (eds). (2007) Attachment Relationships. Milton Keynes: The Open University.

Essay --

In the case against the topic statement, the first area we are going to be looking at is regards to the â€Å"White Hats†. White Hat is a term that was originally used to describe some on sound moral character. Today it used to describe a special kind of hacker, that uses their skill set in order to expose weakness in a system with intent of having them fixed. ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg...

Dance :: essays research papers

George Balanchine was born in St. Petersburg on Jan 22, 1904, into a very musical family and began studying the piano at age 5. He had a classical education in acting and dance training, beginning at age 9, from the Imperial Theater School in St. Petersburg. It was originally thought that young Georgi would become one of the Tsar's cadets, so it was with the thought that if things didn't work out at the ballet school he could always join the army. In fact, in his first year he was not at all thrilled by what he was learning. He only got to perform once in the Maryinsky Theater in such spectacles as The Sleeping Beauty that Balanchine became enamored of the theater. Balanchine was raised on the dance traditions of the classical Russian ballet established by Petipa. In spite of having all the best teachers and dancers in the world at the time Balanchine states that "Contrary to popular belief, ballet was not taken very seriously by the Russian public. It was an entertainment almost exclusively for the aristocracy, among whom there were perhaps only a few gentlemen who were not primarily interested in what the ballerinas were doing after the performance" (balletmet.com). This changed with the revolution. Ballet was banned for a period until the Minister of Education, Lunacharsky, a balletomane, persuaded the authorities to gradually reinstate ballet. Sometime between 1919 and 1921, while continuing to dance, Balanchine joined the Petrograd Conservatory of Music. There he studied piano and music theory, including composition, harmony, and counterpoint, for three years, and he began to compose music. He became a skilled conductor and pianist and often played for graduating student performances at the Imperial Russian Ballet School. He graduated from the Imperial Theater School with honors in 1921 at age 17 and joined the corps de ballet of the Maryinsky, by then renamed the State Theater of Opera and Ballet, and now the Kirov Ballet. Balanchine began to choreograph while still in his teens, creating his first work around 1920 or possibly earlier. It was called La Nuit, for himself and a female student, to the music of Anton Rubinstein. Another of his early duets, Enigma, danced in bare feet, was performed once at a benefit on the stage of the State Theater, as well as for some years thereafter, in both Petrograd and in the West. In 1923 he was able to form a small troupe, the Young Ballet, for which he composed several works in an experimental vein, but the authorities disapproved, and the performers were threatened with dismissal if they continued to participate.

Scm 3301

SCM 3301 Spring 2013 Exam 1 Study Review The exam will cover chapters 1-4 from the textbook. Format: 34 multiple choice questions of approximately equal weightage from each of the four chapters. Resources to study: * Lecture Notes ( If you have missed a class, please obtain the notes from a classmate) * The textbook * Closely read the sections covered in the lectures * Closely read the material related to the main ideas listed below Main Ideas: Chapter One: Describe a supply chain and define supply chain management. * Describe the objectives and elements of supply chain management. * Describe a brief history and some of the trends of supply chain management. * Understand the range of supply chain management activities common to both services and manufacturing * BUY – Supply * MAKE – Operations * SHIP – Logistics * Coordination – Integration * Understand the current trends in Supply Chain Management Chapter Two: Understand the role of supply management and its strategic impact on an organization’s competitive advantage * Understand the profit leverage of effective purchasing * Have a basic knowledge of the manual purchasing process, e-procurement, small value procurement * Understand strategic nature of the â€Å"make or buy† decision * Understand sourcing decisions and the factors impacting supplier selection * Describe the various considerations in assessing the Total Cost of Ownership * Understand how a supplier portfolio is managed Describe the opportunities and challenges of global sourcing Chapter Three: * Explain the importance of supplier partnerships * Understand the key factors for developing successful partnerships * Understand the principles behind the Weighted Criteria Evaluation System * Understand the purpose and creation of a supplier certification program * Explain the importance of a supplier recognition program * Understand the capabilities of Supplier Relationship Management Chapter Four: Define and a ppreciate the trends in ethical and sustainable sourcing * Define and describe the terms: fair trade products green purchasing social sustainability * Describe how ethical and sustainable sourcing strategies are developed and implemented * Understand how Supply Base Rationalization can help improve a company’s ethical and sustainable sourcing * Understand ways that supplier partnerships can help a company’s ethical and sustainable goals * Understand the use of environmental supplier certification and recognition programs

Research Paper NT1430 Essay

When it comes to IPv6 there are a lot of topics that can be discussed. It will change the Internet forever as we know it. IPv4 is the fourth version of protocol using a 32 bit address space whereas IPv6 will be using 128 bits of hexadecimal addressing to allow for drastically more addresses. Currently IPv4 allows roughly 4,294,967,296 possible addresses and with the current allocation practices it limits the number of public address to a few hundred million. In contrast, the 128 bit address space that IPv6 uses can provide roughly 3.4 x 1038 possible addresses. The sheer size of the IPv6 address allows for the subdividing of the address into a hierarchical routing structure that in turn can reflect the current topology of the Internet. This will provide great flexibility for the addressing and routing in the future where the IPv4 obviously lacks in comparison. It would hard to imagine a world where we do have anymore Internet addresses to go around. This should hopefully solve that problem, at least for a while to come. When configuring DHCP on Linux to use IPv6 one must be sure that they have everything in order. The two most used means of auto configuration IPS are on the router advertisement and dhcpv6. When you are using the RA a server daemon needs to advertise a network prefix which is typically a /64, gateway and sometimes a DNS server. Then the Client machines can auto configure their IPv6 addresses when they have initialized a bootup based on their current MAC address using EUI64. When addressing the same situation with dhcpv6, dynamic or static addresses can always be assigned to the current client machines. Unfortunately the gateways cannot be assigned due to the design of the dhcpv6 protocol. If you must use dhcpv6 you have to use RA. You can configure RA to advertise only the gateway leaving the IP and DNS server configuration all up to the dhcpv6, or only the DNS servers. In order to run dhcpd in IPv6 mode you  need to add a -6 argument. The arguments should define the configuration file and lease file. Here is an example of a startup command; /usr/sbin/dhcp -6 –cd/etc/dhcpd6.conf –lf/var/state/dhcpd6.leases eth1. The -6 enables the IPv6 mode and the –cf defines the IPv6 configuration file. Here’s an example of the dhcpd6.conf; # dhcpd6.conf authoritative; option dhcp6.name-servers 2001;db8;1;1;;200; option dhcp6.domain-search ‘internal.1an’; In conclusion, I hope that after this you understand why IPv6 is such a game changer and why it is so important for our world going forward. Without it our planet would cease to exist and everything would stop. Obviously IPv4 is still around and will be for a few more years, but the days of thinking that IPv4 would last forever or definitely over and it’s time for something new will hopefully last a little longer. References http://technet.microsoft.com/en-us/library/cc780310(v=WS.10).aspx //www.cisco.com/web/about/security/security_services/ciag/documents/v6-v4-threats.pdf http://linux.ardynet.com/ipv6setup.php