Stratovolcano the Composite Cones Essay Example | Topics and Well Written Essays - 500 words

Stratovolcano the Composite Cones - Essay Example Stratovolcanoes are common at subduction zones forming a chain of volcanic features along plate tectonic boundaries where the oceanic crust is drawn under continental crust. The magma that is responsible for stratovolcanoes formation rises when water that is trapped both in the porous basalt rock and in hydrated minerals of the upper oceanic crust layer. It is then released into the mantle rock of the asthenosphere of earth’s crust that is above the sinking oceanic slab. After the occurrence of dewatering at high pressures and temperatures for each mineral, the plate descends to greater depths. The released water from this rock then lowers the melting point by cooling the temperatures of the overlying mantle rock. This in turn makes the rock to undergo partial melting and then rises due to its lighter density relative as compared to the surrounding mantle rock and the pools that form temporarily at the base of the lithosphere. The magma then rises thought the earth’s cr ust, carrying silica-rich crustal rock leading to a final intermediate composition. On reaching near the top surface, it then forms a pool in the magma chamber within the volcano, due to low pressure, water and other compounds such as chlorine sulphur and carbon dioxide dissolve in the magma to escape from the solution. Once a critical large volume of magma and gases accumulates the rock that acts as an obstacle is then overcame leading to a sudden explosive eruption (Biley ). Stratovolcanoes are rated as the most hazards to civilians as they cause large numbers of death when they occur. Many deaths are caused by mud and the pyroclastic flow that fast-moving mixture of hot volcanic debris ash and gases that can travel at high speed of about 160km/h. The eruption of Mt Pel’ee on Martinique Island in the Caribbean, El Chi chon volcano in Mexico which killed thousands of lives, the Pinatubo volcano that erupted in 1991 in Manila and the Unzen volcano on the island of Kyushu. Stratovolcanoes mainly form at the convergent plate margins usually where one plate descends beneath an adjacent denser plate at the site of a subduction zone.  

Physiology Essay Example | Topics and Well Written Essays - 3500 words

Physiology - Essay Example This pathway consists of A & A fibers characterised with high velocity (30 to 110 m/sec) of impulse conduction. The dorsal column-lemniscal pathway has also high degree of spatial orientation of the nerve fibres; particularly the medial fibers convey the information from the lower parts of the body while the lateral fibers related to higher segments. The spasticity in the muscles is related to the pyramidal insufficiency. This condition can occur if pyramidal pathways controlling voluntary movements are damaged by the mechanic or other agents. Intoxications, chronic neurodegenerative diseases, traumas, and metabolic disorders can play role in the origin of muscular spasticity. The attenuation reflex is important protective mechanism providing the best sound perception. The contraction of the stapes muscle protects the inner ear from damaging. The role of outer ear structures is important also - they can reduce resonance in the middle ear. Summation is a process of gradual release of the transmitter and the transmission of the impulse from several presynaptic neurones to one postsynaptic neurone (spatial summation) or from only one presynaptic and one postsynaptic neurone (temporal summation). The summation leads to the release of sufficient the impulse is transmitted across the synaptic cleft. The pain control system of CNS is represented by three major components: the periaqueductal grey and the nucleus raphe magnus (in the brain) and the pain inhibitory neurons of the dorsal horns in medulla spinalis. The opioid receptors of these structures are activated by endorphins or exogenous opiates and block the spreading of pain impulses. 3.3 Why is it difficult to localize slow, chronic pain (2) Chronic pain usually irradiate to other areas thus its localisation could be difficult. Furthermore, the efferent pain stimuli are conducted to CNS

The cry of humanity Essay Example for Free

The cry of humanity Essay Many people often cry for this word in some parts of their lives. People express their craving for this entity in different manners such that protests and silent rebellion can be counted as examples of expression of the desire in attaining freedom. People may seem to be so vulnerable when it comes to freedom that they tend to freak out whenever their freedom is being suppressed by other people, say parents or government leaders. I, being a member of the human society also cry for this at times. I am pleading to have my allowance be increased during my high school days and I do not want anyone to hinder my joy in my party life with my friends. Moreover, I want to have my own kitchen and my room so I am free of making my own sandwich with no one to share and ask â€Å"for the nth time around, why are you still eating? † Freedom for me is act of being free to do things whether it is good or bad. Freedom only differs with the words that are tagged to it say for academic freedom, spiritual freedom and political freedom. Academic freedom is something that can be related with the right of every child to be sent to school and receive the essential information about life and sciences. Nowadays, technology is in its boost however, many people especially the youth are not receiving it due to poverty and some terrorism attacks in their country. Political freedom on the other hand, is the appropriateness of the rights and privileges received by each member of the society. When girls are not allowed or permitted to enter politics due to the patriarchal norms of the country, she is experiencing political depression. Spiritual freedom goes with the ability of every person to express their faith without persecution and judgment from others. It is the moment of freely obeying what is in ones doctrines with the practices of a religion or a sect. Faith: An Expression of Freedom From the time of Moses, when the Israelites are still slaves by the Pharaoh Ramesis, they are not able to see the reality that there is a true God aside from the statues and walls of the pyramids or palaces. They were just given the idea that gods can transform stick into snakes but not with some interventions like setting them completely free. Moses actually had doubts the first time he has been called by God at the burning bush and had Aaron to talk for him, as it was commanded by the One who talked to Moses. It was when they believed that there is a far better life than serving the Egyptians. They were able to escape them through the guidance of God hence they were able to head for the Promised Land that is full of flowing milk and honey: that is Canaan, for instance. Christianity is one of the most populated religions in the world. Apparently, most of the societies follow by the practices and the traditions of the said religion. They perceive men would be the best leaders for the society thus sometimes giving no chance for women who have potentials also in leading the church. I now of a church that do not give an account in letting their women preach for they believe in the abilities of men. Society has been a part of molding the beliefs of every people in the world. Since it is composed of many different parts like norms, values and ethics, one may not be so shocked that people really have different point of views on things. Luckily, there are passionate people that give time in studying them. Freedom in choosing a religion is more prevalent during our time since there were already people who fought for it during the early 15th to 17th century. The battle of being recognized as people with strong and distinguished faith is not a problem anymore. There may be different religions that can be seen else where like Catholic, Protestant, Buddhist and Muslims, but we are lucky enough to have the chance to choose the religion that suits our lifestyle. Perhaps will not be our passes to eternal life, but it is our faith that separates us from others and with that, we will be living with those standards as long as we are alive. Speaking our freedom Mass media is a source of information that gives us the idea of the current events in our country. Whether news pertains to celebrities or politicians or calamities, the existence of the developed broadcasting or journalism is a big help in easing some of our life’s problems. During some points in the martial law, and dictatorial presidency or leadership of some leaders in the world, the news and public affairs of those were put into a shut, giving no opportunities for them to report the true and correct occurrences in their country. Those people who will rebelliously report the anomaly will be soon in the death bed with a bullet on their head or chest part. Ellis obviously gave his points of view regarding this matter. He cited some examples that can give us the idea of what freedom of speech is. The presentation of ideas were detailed hence it gave me the feeling that media should not be oppressed for telling the truth. It should be fought for instances of government abuse. Freedom of speech doesn’t only occur on the broadcasting part of the society but also in the inner communities wherein the normal people lives. It is the way people express their ideas with no hesitations and no other people that would tell them what to do. It does not necessarily mean going with the opposite flow of the norms but rather, it is an opportunity to bring more treasures in the mind bank of every civilizations. For sure, there are many beliefs that are outdated and can not be applied to the present situation of the world. With that, presentation of ideas is necessary to solve some of the troubles at a certain time. Ideas are best presented with no hesitations, but I agree that it is a healthy way of enriching a body’s mind through some exchange of ideas that can actually get into a conclusion that resolves the case yet, both parties had their own time for shining, explaining their point of views. Questioning may be a good sign of comprehension thus signifies the impact of the thing that we are after. Freedom for both As many people have argued and died for religion and freedom of expression, we must note that we are fortunate that we were born in an era where we no longer have to battle with guns and swords for it like the gladiators and the cowboys before. Having them establish at this point will b\make it much more easier for us to choose what is right rather than seeking for it or founding a new one. Both religion and speech are parts of our lives that our essential in our beings. Religion, as we all know has the idea of god or gods that direct our path to what we think is right. It may show us the best way to do things in their right place and time. While speech is a channel of ourselves that help us be known by others. It is very important that we are able to fight for them thus our rights for living may not be suppressed also. There may be instances that people will contradict what we believe in but it is very important that we truly know what we are standing and living for. Life is a matter of believing and striving for some realizations. References Freedom of Speech – Reader Feedback and Response. Retrieved 14 July 2008 from http://blog. tomevslin. com/2006/02/freedom_of_spee_1. html Hurd, Michael J. 2008. Judge Joseph Lieberman by his Ideas, Not His Religion and Race. Retrieved 13 July 2008 from http://www. capmag. com/article. asp? ID=716 Thomas Jefferson. 1999. Freedom of Religion. Retrieved 14 July 2008 from http://etext. lib. virginia. edu/jefferson/quotations/jeff1650. htm

Essay on the Dark Side of the Mind Exposed in Cask of Amontillado

The Dark Side of the Mind Exposed in Cask of Amontillado "A wrong is unredressed when retribution overtakes its redresser. It is equally unredressed when the avenger fails to make himself felt as such to him who has done the wrong." With that statement, Montresor begins his tale of revenge deciding that the act must be slow and sweet and that in order to fully enjoy it, his adversary must be aware of his intentions. Hidden within those same few lines, lies not only this horrid plan, but also the true interest of its' true author. In his Cask of Amontillado, Edgar Allen Poe reveals his supreme interest in the dark side of the human mind and heart. Much of what a story means, much of its effect on the reader depends on the eyes through which it is seen and on the voice that tells it to us. In Cask of Amontillado, those eyes and voice belong to Montresor. The story is written in second-person perspective. In relaying the events of the day, Montresor refers to the reader as 'you' several times. This does not only act to pull the reader into the story, but it also provides a valuable insight into the mind of the author. By referring to the reader as 'you' a connection is established between Montresor and the reader. This connection suggests that the reader can sympathize with the actions of Montresor by relating them to some event in the readers' past or imagination. Poe suggests that we, as a body of readers, all want to commit acts such as that committed by Montresor and therefore can understand him and his dark actions. To fully understand the dark side of the human mind and heart, the mind of Montresor has to be examined. The question as to what fiendishly evil act Fortunato committed that was so seve... ...each step, Montresor pulls Fortunato in a little further by provoking him with threats of getting his archenemy Luchresi to test the wine. Without breaking from his calm shell, Montresor is able to lead Fortunato to his doom never once faltering or stumbling. In his Cask of Amontillado, Poe dives into a study of the darkness of the human mind and heart. He looks at the worst crime possibly committed by one human to another and ponders over the mind of the criminal. Montresor, calm, cool, and collected, is able to fulfill a plan that he had made long before. Fifty years later, he conveys the story to the world so that the dark side of all people may be matched against that of him. A man that truly lives by the motto of his family, "nemo me impune lacessit" [no one provokes me with impunity], Montresor becomes a study for Poe and a mirror to all mankind.

Information Systems and Information Technology Essay

A combination of hardware, software, infrastructure and trained personnel organized to facilitate planning, control, coordination, and decision making in an organisation Contrast IS and IT: What is the difference between Information Systems and Information Technology? In: Computer Terminology, Technology, Information Technology[Edit categories] Answer: Information Systems is a large umbrella referring to systems designed to create, store, manipulate, or disseminate information. Example of an information system is a pencil and a piece of paper. The two objects themselves are just tools, but together they create a system for writing (information). The term Information systems has been around a lot longer than the computer, or the term information technology. These days the two are sometimes thought to be synonymous, but that, in most cases is a misconception. Information technology falls under the information systems umbrella, but has nothing to do with systems per say. IT deals with the technology involved in the systems themselves, e.g. an information system like wiki.answers.com contains many information technologies. Servers, server operating systems, web-server software (IIS, Apache, et al), and code written for the web-server software (PHP, C#, VB, PERL, Ruby, et al). Even your computer and browser make up part of this information system. Like the pencil and paper example, each one of the mentioned parts of this information system in itself is an information technology. That being said, most people in the profession no longer make a distinction. Moreover, companies call their IS/IT department a wide range of titles based on more on culture and tradition than anything else. Assist With Business Processes Information systems aid businesses in developing a larger number of value  added-systems in the company. For example, a company can integrate information systems with the manufacturing cycle to ensure that the output it produces complies with the requirements of the various quality management standards. Adoption of information systems simplifies business processes and removes unnecessary activities. Information systems add controls to employee processes, ensuring that only users with the applicable rights can perform certain tasks. Further, information systems eliminate repetitive tasks and increase accuracy, allowing employees to concentrate on more high-level functions. Information systems can also lead to better project planning and implementation through effective monitoring and comparison against established criteria.

Metamorphic Facies Defined and Explained

As metamorphic rocks change under heat and pressure, their ingredients recombine into new minerals that are suited to the conditions. The concept of metamorphic facies is a systematic way to look at the mineral assemblages in rocks and determine a potential range of pressure and temperature (P/T) conditions that were present when they formed.   It should be noted that metamorphic facies are different than sedimentary facies, which include the environmental conditions present during deposition. Sedimentary facies can be further divided into lithofacies, which focus on a rocks physical characteristics, and biofacies, which focus on the paleontological attributes (fossils).   Seven MetamorphicFacies There are seven widely recognized metamorphic facies, ranging from the zeolite facies at low P and T to eclogite at very high P and T. Geologists determine a facies in the lab after examining many specimens under the microscope and doing bulk chemistry analyses. Metamorphic facies is not obvious in a given field specimen. To sum up, a metamorphic facies is the set of minerals found in a rock of a given composition. That mineral suite is taken as a sign of the pressure and temperature that made it. Here are the typical minerals in rocks that are derived from sediments. That is, these will be found in slate, schist and gneiss. The minerals shown in parentheses are optional and dont always appear, but they can be essential for identifying a facies. Zeolite facies: illite/phengite chlorite quartz (kaolinite, paragonite)Prehnite-pumpellyite facies: phengite chlorite quartz (pyrophyllite, paragonite, alkali feldspar, stilpnomelane, lawsonite)Greenschist facies: muscovite chlorite quartz (biotite, alkali feldspar, chloritoid, paragonite, albite, spessartine)Amphibolite facies: muscovite biotite quartz (garnet, staurolite, kyanite, sillimanite, andalusite, cordierite, chlorite, plagioclase, alkali feldspar)Granulite facies: alkali feldspar plagioclase sillimanite quartz (biotite, garnet, kyanite, cordierite, orthopyroxene, spinel, corundum, sapphirine)Blueschist facies: phengite chlorite quartz (albite, jadeite, lawsonite, garnet, chloritoid, paragonite)Eclogite facies: phengite garnet quartz Mafic rocks (basalt, gabbro, diorite, tonalite etc.) yield a different set of minerals at the same P/T conditions, as follows: Zeolite facies: zeolite chlorite albite quartz (prehnite, analcime, pumpellyite)Prehnite-pumpellyite facies: prehnite pumpellyite chlorite albite quartz (actinolite, stilpnomelane, lawsonite)Greenschist facies: chlorite epidote albite (actinolite, biotite)Amphibolite facies: plagioclase hornblende (epidote, garnet, orthoamphibole, cummingtonite)Granulite facies: orthopyroxene plagioclase (clinopyroxene, hornblende, garnet)Blueschist facies: glaucophane/crossite lawsonite/epidote (pumpellyite, chlorite, garnet, albite, aragonite, phengite, chloritoid, paragonite)Eclogite facies: omphacite garnet rutile Ultramafic rocks (pyroxenite, peridotite etc.) have their own version of these facies: Zeolite facies: lizardite/chrysotile brucite magnetite (chlorite, carbonate)Prehnite-pumpellyite facies: lizardite/chrysotile brucite magnetite (antigorite, chlorite, carbonate, talc, diopside)Greenschist facies: antigorite diopside magnetite (chlorite, brucite, olivine, talc, carbonate)Amphibolite facies: olivine tremolite (antigorite, talc, anthopyllite, cummingtonite, enstatite)Granulite facies: olivine diopside enstatite (spinel, plagioclase)Blueschist facies: antigorite olivine magnetite (chlorite, brucite, talc, diopside)Eclogite facies: olivine Pronunciation: metamorphic FAY-sees or FAY-shees Also Known As: metamorphic grade (partial synonym)

Informative Speech Special Events - 1328 Words

Special Events Special events are parties with a 4-point purpose. To be most effective and worthwhile events should optimally achieve four primary goals: †¢ An event should celebrate your school’s mission and vision; †¢ An event should help you identify and engage new prospects for your school; †¢ An event should raise money in support of your school’s overall mission or for a particular program; and, †¢ An event should promote your school to the broader community. Of all the revenue streams in a comprehensive advancement program, special events give your school the most exposure to the largest possible audience, but they also cost the most per dollar raised. While special events are considered a revenue stream within a comprehensive†¦show more content†¦Finally, evaluate your event. Did you meet your participation and fundraising goals? Did you have enough volunteers? What elements of your event were a hit, and which ones weren’t as popular? Were there any snags the night of the event that can be prevented next year? What would you do differently next year? Consider more than just how much was raised and how many people attended – factor in how much paid staff time and volunteer time the event required. Institutional Funders There are three types of institutional funders: Corporations, Foundations, and the Government. Government funders include federal, state and local government agencies, and funding may be in the form of pass-through funds, subaward funds, or contracts and collaborative agreements. Federal grants are considered economic aid issued by the United States Government provided in order for the recipient to carry out a public purpose. There are Categorical Grants that include project grants and formula grants, Block Grants and Earmark Grants. Corporate Giving Corporate giving, also known as corporate philanthropy, refers to the act of for-profit companies donating some of their profits or resources to charity. 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