Max Dupain Essay Example for Free

Max Dupain Essay The sunbaker was taken in 1938 Some of the artistic intentions and reasons that Max Dupain has taken this photograph exactly in this way are that max Dupain has deliberately faded away the background in this photograph to highlight and draw the eye upon the picture of the man. He may also have decided to fade the background, as the way the sand blends in with the skin colour of the man, adds to Dupain’s theme of â€Å"beach culture†. Max Dupain has also taken this photograph as a full body close up of the man, which suits the photograph more. Like many of Dupain’s photograph, this photo is taken and has association with the beach. The atmosphere, from looking at the photograph, is quiet and unruffled and the mood can be described at peaceful; the conditions that most sunbakers love. This photograph focuses on the way that this scene was captured, as well as the man and the features he possesses. The Sunbaker by Max Dupain was an interesting photograph and the way he did it portrayed his theme of â€Å"beach culture† very well. By Maddi Meldrum

Electromagnetic Field in MRI

Electromagnetic Field in MRI Haoqi Yu Physics 2702 Tatiana Seletskaia MRI is an abbreviation of magnetic resonance imaging, it is first discovered by two physicists in 1947, Felix Bloch and Edward Mills Purcell. MRI is an imaging device that uses both powerful magnetic fields and radio frequency to produce detailed pictures organs and structures inside the human body. It is mainly used to detect the oscillations of hydrogen atoms. The magnetic field strength in an MRI machine is measured in Tesla (T), majority of clinical MRI are performed at 1.5 or 3T. The MRI machines produces an extremely strong magnetic field up to 50,000 times that of the Earths magnetic field and electromagnet of similar strength would be able to pick up a car. Static magnetic fields are created by the flow of direct current electricity, The human body is made up of 70% of water, which is largely composed of water molecules. A water molecule consists of two atoms of hydrogen and one atom of oxygen. MRI relies on the magnetic properties of a hydrogen atom to produce images. Hydrogen being the simplest element in the periodic table, it consists of just a single proton for its nucleus, with no neutrons and is orbited by a single electron. A way to model a proton is to think of it as a sphere composed of positive current loops that are stacked to one another.   Like the earth, proton has a spin, a north and south pole, and it spins around its magnetic pole. As a positive spinning charged particle, it produces a magnetic dipole moment. Normally, the proton is oriented randomly so there is no overall magnetic field, it will just spin regularly. When it is placed in an electromagnetic field, the proton will start precessing, at a rate depending on the field strength of the MRI system. The components of the MRI system incl ude the primary magnet, gradient magnet, radiofrequency (RF) coils, and the computer system. The primary magnetic field refers to the strength of the static permanent field, hydrogen atoms align parallel or antiparallel to the primary field (B0), this is called longitudinal magnetization. The main purpose of this RF pulse is to disturb the protons which are precessing. A greater proportion of the hydrogen protons aligns to the direction parallel to the primary magnetic field or low energy state than antiparallel or high energy state. The net magnetic vector is in the direction of the primary magnetic field. The proton spin around the long axis of the primary magnetic field is called precession, the precession rate is called the Larmor frequency. When protons precess together, this is known as in phase, when protons process separately, that is known as out of phase. The frequency changes in proportion to the magnetic field strength at 1.5T is 63.9MHz. The gradient coils generate secondary magnetic field over the primary field, they are located within the bore of the primary magnet. They are arranged in opposition to each other to produce positive and negative poles, the arrangement of these gradient coils gives MRI the capacity to image directionally along x, y, z axis. Gradient magnets alter the strength of the primary magnetic field, thereby changing the procession frequencies between slices. The RF coil is used to transmit a second magnetic field, which results in a disturbance of the proton alignment. Some low energy parallel protons flip to a higher energy state, decreasing longitudinal magnetization. Protons then become synchronized and precess in phase. Thus, a net magnetization vector turns towards the transverse plane to the primary magnetic field. The radio frequency coil is used to receive signals to create images as protons resume their normal state in the primary magnetic field prior to transmission of the RF pulse. A fter the RF pulse, protons flip back to their low energy state parallel to the primary magnetic field. MRI machines uses static magnetic fields in the range of 200 to 3000mT. Static magnetic fields are generated by permanent magnets, wherever electricity is used in form of direct current through superconductors. The signal with the body increases as the field strength of the static field increases. The MRI machine gets the image from the hydrogen body in our body, when the body is in the MRI, it activates the hydrogen atoms. It puts them in a state where there now susceptible to forms of energy, when radio frequency energy is added, the hydrogen atoms are in a high-energy state. When hydrogen atoms are in the high-energy state, they are going to try to decrease its energy level and release it to the surrounding structures. Hydrogen atoms in fat have a different frequency in terms of its ability to release radio frequency energy, so the MRI image is bright and dark. References YouTube. Ominhs, 14 Oct. 2011. Web. 07 Mar. 2017.  . Magnetic resonance imaging. BMJ : British Medical Journal. Ed. Abi Berger. BMJ, 05 Jan. 2002. Web. 07 Mar. 2017. Magnetic resonance imaging (MRI). Encyclopà ¦dia Britannica. Encyclopà ¦dia Britannica, inc., n.d. Web. 07 Mar. 2017. Blink, Evert J. Mri : Physics. Mri Physics. N.p., n.d. Web. 7 Mar. 2017. Schild, Hans H. MRI, made easy ( well almost). Berlin: Schering, 1990. Print. Static Fields. Static Fields: 3. What Are the Sources of Static Magnetic Fields? Green Facts, n.d. Web. 07 Mar. 2017.

Controlling Illegal Street Racing :: essays research papers

The automobile was invented around 1890, ever since then people have been trying to push the limits of the automobile. With the desire to push the limits of automobiles competition was created, and spawned racing. Racing comes in many forms, from circle track racing to drag racings. Many of these racing events are held in controlled areas and are sanctioned by governing bodies with rules and regulations to make the sport safe. The downside to this notion of competition has created amateurs who try to duplicate racing in uncontrolled environments causing death and carnage. This brings us to the idea of street racing, it is a derivative of drag racing, but as the name implies it is done on the street. Since street racing takes place on public roads it is hard to control every variable that may occur resulting in crashes that involve innocent bystanders. There are ways however, to combat street racing and to help amateurs participate in drag racing in controlled and safe environments in stead of public roads. Out of these many ways to combat street racing are two ways to help stop this problem. One of these ways is the sectioning of new drag strips, and racing events that are taken off the road and into areas that can become controlled environments. The other way is to implement stricter enforcement and more severe punishments for those caught street racing. Street racing can be controlled if done correctly. Opening racetracks and getting existing tracks to stay open longer and later for the people that normally race illegally is a step in the right direction. By opening tracks in and around large cities you make it easier for people who might other wise partake in street racing and endanger the lives of others. Often times in large metropolitan areas you would have to travel one, two, three, maybe even four hours away to find a legal drag strip. This makes it less convenient to people that are interested in racing and ultimately leads them to just race where and whenever they can in the local area. Another way is for organizations to help sponsor these types of events. They do not have to build a racetrack on every corner, but it is the idea, that you can make a large parking lot or old airport runway a legal and safe place for people to race. Some programs have had great success with this, for instance Race Legal holds events in southern California to help get the young kids that parti cipate in dangerous street racing off of the streets and give them a safe and legal place to race.

Pablo Escobar Essay -- Biography Biographies Bio

Pablo Escobar The paper traces Escobar's life from humble peasant beginnings to powerful cocaine drug dealer and kingpin. The paper discusses the sound financial decisions Escobar made as well as the way he invested in legitimate projects using the funds he gained illegally. The paper explores the influence Escobar had and the way he worked, ultimately unsuccessfully, to establish a no-extradition clause into the Colombian constitution. Pablo Emilio Escobar Gaviria was born on December 1 1949 and died on December 2, 1993. Pablo Escobar was a man of power and riches during his time in history. He become famous as a Colombian drug wholesaler . Pablo Escobar beacome so rich and powerful in the drug business that in 1989 , Forbes magazine had listed him as the seventh richest man in world. richest man in the world.He is actually considered to be one of the most most brutally cruel, determined and prevailing drug dealer in history. Pablo once told his mother that he wanted to be "big" someday but I don't think this was what she had in mind. Pablo started out making money by sneaking into grave yards at night and stealing the tombstones from the deceased he would then sand blast the engraving off of the tombstone and sell them as new grave markers to the Panamanians. By age twenty Pablo was also an accomplished car thief. His small time crimes would never amount to what he was going to become. His reputation grew after a well known Medellin drug dealer named Fabio Restrepo was murdered in 1975 ostensibly by Escobar,all of Restrepo's men were informed that they now worked for Pablo.. It was here that he began his pattern of dealing with the authorities by either bribing them or killing them. During the 1980s, Escobar ... ... special. He wanted to get to the top quickly and as a child decided he was not going to take the slow and steady path that law abiding citizens took. He began a life of crime, without regard to who he hurt and killed along the way. His eventual success in the community did not negate the means he used to gain that success however and when he tried to use his gained political popularity to change the constitution in a manner that would erase his past the public turned on him. He went to prison, escaped and died. Had Escobar not existed, the business aspects of the drug world would not be as organized as it is. He was able to develop solid financial and business practices in an illegal world. He left a mark in which is name will always be associated with the notorious drug lords of the world. Pablo Esobar wanted the good life, but he didn't care who he hurt to get it."

Lost Sounds :: Free Descriptive Essay About A Place

Lost Sounds At first, it was a little awkward, but after I got accustomed to keeping my eyes closed in front of the whole class, I could relax and just listen. The many times I had previously visited the Everglades, it had never occurred to me that one very important aspect of the Everglades is the calming sounds it produces. I then remembered that many people come to the Everglades not to learn about it or enjoy its views, but to get away from the chaos of the city. With my eyes closed and my classmates quiet, I felt I was by myself. Nothing could come between me and the nature surrounding me. I heard a little bird in the distance, its chirp muffled by the leaves fiercely rustling in the wind; it reminded me of one of those CDs that people buy to relax or fall asleep. This â€Å"CD,† though, would never be heard again: in my mind I had captured the unique music made by nature at that precise moment. When I got home, I locked myself in the bathroom, turned the light off, and closed my eyes once more. I wanted to see if I could remember those sounds: I knew they would make me eager to return to class in two weeks. My experiment was a success. I can only imagine the feelings of the first explorers of the Everglades when they got to these majestic lands. Native Americans had already been living there for millennia when the Everglades was â€Å"discovered,† and had grown accustomed to the music it made. Yet, the new explorers probably had not seen or heard anything similar in their lives. When they closed their eyes, they would have heard nature yet untouched by the hands of humankind: hundreds, maybe even thousands, of birds calling each other, alligators bellowing under a cool shade, frogs imitating crickets and pigs, and, of course, the soft wind making waves on the sawgrass and then softly cooling their faces. It must have been glorious! Most of these things can still be heard today, but less frequently. As people hunted down animals, drained the Everglades, and developed cities, they took away many key elements of this ecosystem. Some, like the birds, are still struggling to achieve stable numbers of populatio n that would guarantee the survival of future generations of their species.

Opium As A Chinese Saga Essay

The Lure That Was China Amidst it all, she withstood the grandeur of her civilization and past, her legacy and mystique, her people and culture: China is the ever yearned for prize of colonization; of commercialism; of travelers of yore and hitherto – for she has everything to be proud of in any given time. She has achievements, inventions, products, people, craft, art, inert knowledge, philosophies, grace – so with her natural resources. Up until the end of the 17th century, China and her people and their life was as they preferred it to be. Then the West was utterly impetuous to indulge China to comprehensive trade. China has most exquisite exportable products: porcelain, silk, tea. The West love to have them. However, there is nothing much that the Chinese need from the West – nor find of any use. Specifically Great Britian, Europe could not allow an imbalance trade. So, in 1793, Britain sent a diplomat and successfully was given an Imperial audience. The array of European products presented was wonderful and would be suitable for the balancing of trade that must be established between Europe, between Britain and China. It was a disappointment. The Emperor wrote King George: â€Å". . . As your Ambassador can see for himself, we possess all things. I set no value on objects strange or ingenious, and have no use for your country’s manufactures. . . Our Celestial Empire possesses all things in prolific abundance and lacks no product within its own borders. There was therefore no need to import the manufactures of outside barbarians in exchange for our own produce. But as the tea, silk and porcelain which the Celestial Empire produces, are absolute necessities to European nations and to yourselves, we have permitted, as a signal mark of favour, that foreign hongs [merchant firms] should be established at Canton, so that your wants might be supplied and your country thus participate in our beneficence. † (Historywiz, 1999-2005) And the problem began. China Sets A Foothold As the West expressed its agitation about such imbalance of trade, China thenon closed its doors from trade. It isolated itself. It allowed selective foreign trade only via the City of Canton (now Guangzhou). The Europeans could not do away with the Chinese goods. So their gold and silver paid for what they want. It never flowed back to Europe because there was nothing that the Chinese want from Europe. What drove China to distance itself from Europe is because of the haughtiness the Europeans pursued with regards to trade. To this the Chinese is unaffected. For the Chinese, they are sufficient to themselves. Their confidence is a sense of superiority in their race. Their domestic trade is immensely rich on their own. China is a country, a nation, a people that is very big, very fruitful, very rich, very diversified in natural resources. Furthermore, as China’s interaction with the foreigners from that time made them wary. They felt intimidated and therefore became protective of itself. Thus, the isolation. Then, particularly the British, drew the gambit: Opium. Benign Was Opium Supposed To Be Opium has been in China and its use for as far back as 12 centuries ago. The purpose was medicinal. It cured diarrhea. Up and until 17th century it was sparingly mixed with tobacco as a means of relaxation. It was said to have been introduced by the Arabs, then the Portuguese, the Dutch. It is one of the lesser portion of trade that China indulges in but placed under control. This is what the British saw to balance things out with China. But â€Å"in 1729, when the foreign import was 200 chests, the Emperor Yung Ching issued the first anti-opium edict, enacting severe penalties on the sale of opium and the opening of opium-smoking divans. The importation, however, continued to increase, and by 1790 it amounted to over 4,000 chests annually. In 1796 opium smoking was again prohibited, and in 1800 the importation of foreign opium was again declared illegal. Opium was now contraband, but the fact had no effect on the quantity introduced into the country, which rose to 5,000 chests in 1820; 16,000 chests in 1830; 20,000 chests in 1838, and 70,000 chests in 1858. † (La Motte) China therefore was alarmed with the increasing use of opium by its people. It decreed a complete prohibition of its trade. Yet, the addiction that the Chinese evolved into towards the drug, encourage Western traders to penetrate China. On top of this the Chinese empire is facing corruption and fraud in its government. Bureaucracy is becoming inefficient and weak emperors are no longer qualified to face the problems. No matter what laws and penalties are imposed on the trade and use of opium, it fell on deaf ears. The profits were too much for underground Chinese traders not to connive with Western exporting traders. The balance of trade is deteriorating and China was awakening to the scourge. â€Å"In 1839 the Emperor ordered Commissioner Lin Tse-Hsu to put a stop to the opium trade. Lin wrote to Queen Victoria, appealing to the British sense of justice and compassion: ‘We have heard that in your own country opium is prohibited with the utmost strictness and severity:—this is a strong proof that you know full well how hurtful it is to mankind. Since then you do not permit it to injure your own country, you ought not to have the injurious drug transferred to another country, and above all others, how much less to the Inner Land! Of the products which China exports to your foreign countries, there is not one which is not beneficial to mankind in some shape or other. There are those which serve for food, those which are useful, and those which are calculated for re-sale; but all are beneficial. Has China (we should like to ask) ever yet sent forth a noxious article from its soil? ’ He received no reply.  Left on his own to solve the problem, Lin ordered the destruction of a large supply of opium stored on Chinese soil. † (HistoryWiz, 1999-2005) Then, the two opium wars ensued. China lost. Effects of Loss Moral Effects All because of misunderstanding and obstinacy about how to balance trade, China had to experience a loss not just in terms of economics more importantly the destruction of their moral fibre. The imbalance is not only in trade but waging conflict towards strengths and weaknesses, superiority and pride. The unknowing Chinese at the end was the one who paid the bigger price because of an addiction he likewise unknowingly developed. Because of the lure of the profits, even the Chinese himself pitted against his own countryman’s destruction of his morality. After so many years of demoralization due to the tremendous addiction of the Chinese and the usurping profiteering of the scrupulous Chinese and foreign businessmen, China for once and for all to work itself unanimously to kick the habit. The emperor ordered that in ten years no more opium traffic will be allowed. No matter that China has tremendous distances as a vast land; no matter that have no viable means of telecommunication; no matter that they have very few learned people – they all decided to get rid of opium. The West agreed to cooperate with China to lift them from their moral bondage of drug addiction. Economic Effects As a turning point in the life of China as a nation and a people, its loss counted likewise the diminishing territorial rights it holds. China then had to sign the treaties of Nanjing and Tietsin in surrender and allowed its doors again to international trade. As foreign trade was pursued, Western merchants bought silk and tea from China, increasing the volume remarkably as years went by. Because of this, Chinese farmers opted to abandon producing food stuff and concentrated on silk and tea. Thus food prices skyrocketed. With five more ports opened, the former boatmen who worked in Canton ports met with unemployment. Aggravated by rising food prices, the unemployed became more miserable. It is not all glory with increased trade. The instant resurgence of trade volumes caused a shortage in Spanish silver dollars. It has to be abolished due to its uncontrollable appreciation and was replaced by the Mexican dollars. There are also imbalances in the local currencies. Copper cash depreciated because of inadequate supply of copper and the inefficient government. This is a total destruction of the financial systems of China and they were left with the introduction of paper money in 1853. Another commercial activity affected after the loss to the opium war was the textile industry. Cloths are produced by hand in China. The West brought in cheap machine made cloths. That killed local production. And then there is the basic agriculture and home grown industries that were affected by the changes in other commercial activities. Capitalism surged into China’s consciousness and yet China was not ready for the big time game of capitalism. They were not that knowledgeable about managing profit and loss. Sociological Effects With the shameful loss from the opium war, the Chinese lost faith in the superiority of their race. They came to recognize the superiority of the Westerns. They decided to get to know them and their ways. The Chinese decided to discover the political, social and technological know-how of the Western culture. Thus, they came to know and open up to what diplomacy and foreign relations are all about. Political Effects: Since the loss of China was due to the superiority of the Western armaments, China looked into the advancement of their military and armory. They opened modern factories for modern weapons to be produced. The factories were set not to make money but for purposes of the development of Chinese military. The opium war likewise revealed the ineffectiveness of the feudal system. Its Manchu government became incapable of protecting and governing the citizenry. Poverty prevailed; petty revolution ensued; the economy collapsed. The Chinese intellectuals rose up to the occasion and likewise looked into re-organizing its government an dpolitics. Conclusion: China’s quagmire in opium was not a show of the total weakness on the part of its people, but rather insufficiency of appropriate support. For not knowing any better, they indulged because it was available. The inherent cultural perspective and philosophies are quite strong yet it was limited to the features of their time. Modern circumstances that come along their way are not something they are really prepared for. Education and information was not present at that time. Coupled with this shortcoming of the pertinent period of time, the West was incessant in its colonization and commercial and capitalist activities. At that period of time, the West sees itself as the lord and master of the whole world. What they occupy and spread must be taken hook, line and sinker. The trade objectives of the West were very encompassing, so with the rest of their occupation strategies. If the West was morally short sighted in instigating addiction among the Chinese people and the infiltration and condoning of underground Chinese business man with the lure of profit in the opium trade – then the Opium War is something that it is not a laurel to have won. And on the part of China, the opium war and rising above its ashes might have been a blessing in disguise. For what China is now in this 21st century is a result of lessons learned.

Identify the Strategies for Strengthening Local Financial Capacity in Malaysian Local Government.

Identify the strategies for strengthening local financial capacity in Malaysian local government. The first strategy that can be used to strengthen the financial capacity in Malaysian local government is by generating the new avenues for revenue source which are sought to supplement the income of the local authorities. This may include sale of the municipal bonds, rezoning of the land from the residential to commercial purposes or taking the equity share in the privatization project.Another alternative that available to be taken by the Malaysian local government is by increasing the assessment tax imposed to the local people. The public should be explained on what extent the local authority increasing their assessment tax. For example, due to the increase of the demand for the local government functions and services, it requires high cost and unfortunately, the current condition of the local government cannot fulfil it urges them to do so.Before the local government wish to increase the tax, it is important for the local people to be informed in order to know their view as well as they may discuss with the local authority for the betterment of the services provided in their area of jurisdiction. The third strategy that can be used to strengthen the local financial capacity in Malaysian local government is by offering land pooling. It is an activity which is mostly practiced in the countries like Australia, Japan, Korea and Taiwan.It is a situation whereby owner of small plots of land will be encouraged to combine their land together for profitable development under the local authority concern. For example, the land owners surrender their land to the local authority for the provision of infra and development, after which area are re-allocated to the owners. The local authority retains a small portion of the readjusted land as its contribution and can utilize this land for its own purpose. The next way that can be taken by local authority in Malaysia to become a strategy in strengthening the financial capacity is through re-zoning process.It is the process of changing the status of the land usage. For example, from the status of residential, change to commercial status where it can generate more income in term of tax where a higher assessment rate can be imposed. Generally, this can be applied to certain residential areas whereby a large number of houses have been permitted to operate their businesses from or within their premises, but is still being assessed by the local authority under residential status.