Sensor Technology for Mineral Exploration

Sensor Technology for Mineral Exploration 1. Introduction Significant contribution is done by satellite remote sensing in the field of mineral exploration viz. Geological faults, fractures and mapping, which are associated with the ore deposits based on spectral signature, (Farooq and Govil 2013; Magendra and Sanjeevi 2014; Murphy and Monteiro 2011, Le Yo et al., 2011) the spectral signature helps in the recognizes hydrothermal altered rocks (Sabins, 1999). The multispectral remote sensing exhibits differences in spectral signatures which are insufficient spectral resolution for the hydrothermal altered mineral mapping (Clark, 1999). The Multispectral sensors viz. Landsat TM, ETM+, ASTER image processing helps in iron oxides mapping, the spectral ranges 1.55-1.75 Â µm and 2.08-2.35 Â µm is important for iron mapping (Gupta, 2003). The hyperspectral images provide a higher spectral resolution the the multispectral images (Clark et al., 1990; Magendra and Sanjeevi 2014; Van der Meer 2012). The discovery of new hyperspectral sensor technology in terms of both sensor and technical development has provided the opportunity to revisit previous remote sensing approaches for the mineral exploration as well as for the development of improved methods. Hyperspectral sensors have hundreds of channels, aircraft and satellite platforms which provide unique spectral datasets, and which are helpful in analyzing the surface mineralogy mapping (Goetz et al., 1985; Kruse et al., 2003; Debba et al., 2005, Vaughan et al., 2003). The airborne sensors like AVIRIS, HYDICE and Satellite sensor like Hyperion are used for mapping geology, snow etc. Hyperspectral remote sensing aims at providing the requirements like spectral, spatial and radiometric empower, measuring in terms of range, sampling, response, stability, uniformity, precision and accuracy. With the help of hyperspectral remote sensing we can find different minerals viz iron oxides, micas, chlorites, amphiboles, talc, serpentines, c arbonates, quartz, garnets, pyroxenes, feldspars and sulphates (Eva Papp and Cudahy 2002; Magendran and sanjeevi 2014; Hubbard and Crowley 2005). EO-1 Hyperion is the first Space based hyperspectral sensor, and it was launched on 21 November 2000 (Ungar et al., 2003). The Hyperion image has 30m spatial resolution, 242 channels and 7.7 km swath. The hyperspectral (Hyperion) sensor with 0.4-2.5Â µm spectral range, i.e. visible-near infrared (VNIR) spectrometer (approxmeterly0.4-1.0Â µm) and one short-wave infrared (SWIR) spectrometer (approximately 0.9-2.5Â µm) (EO-1 User guide) in which some minerals and rocks show good absorption and reflectance, due to variation in physicochemical properties, which help in their exploration mapping (Clark et al., 1990; Hunt et al., 1971). The spectral reflectance one can detect and identify the Earth surface and atmospheric constituents to measure the reflected spectra’s component concentration. We can find the distribution of the component and validate by improving models. The processing of Hyperion image is a challenging task as it consists hundreds of channels. The selection of required channels with its good apparent reflection requires good skills. The direct measurements of atmospheric properties are rarely available, and there are some techniques which surmise them from their imprint on hyperspectral radiance data. These properties are used to constrain highly accurate models of atmospheric radiation transfer to produce an estimate of the true surface reflectance. Moreover, atmospheric corrections of this type can be applied on a pixel by pixel basis since each pixel in a hyperspectral image contains an independent measurement of atmospheric water vapor absorption bands. There are different models available viz QUAC, 5S, 6S, ATCOR, ATREAM, HATCH, EFFORT Polishing, FLAASH etc (ITTVis, 2010). FLAASH is a MODTRAN4-based atmospheric correction software package, which provides accurate, physics-based derivation of apparent surface reflectance, through derivation of atmospheric properties such as surface albedo, surface altitude, water vapor column, aerosol and cloud optical depths, surface and atmospheric temperature from hyperspectral imaging data. FLAASH uses the most advanced techniques for handling particular stressing atmospheric conditions, such as the presence of clouds, cirrus and opaque cloud classification map adjustable spectral polishing for artifact suppression. The Hyperion image consists of a huge number of data sets which are supposed to be reduced dimensionally. The techniques like Minimum Noise Fraction (MNF) transform are used to reduce the number of spectral dimensions to be analyzed. The pure pixels are the most spectrally extreme pixels (Broadman et al., 1995), which spectrally correspond to the mixing end members. These end members form the base for the n-Dimensional visualization, and each selected end members are spectrally matched with USGS spectral library. The near visible near infrared image (VNIR) and shortwave infrared (SWIR) spectral range cover the features of iron bearing minerals, hydroxyl bearing minerals sulphates and carbonates. The iron ores and iron bearing minerals have characteristic spectra in the 850nm to 950 nm wavelength (Magendran and Sanjeevi, 2014). The ferric iron minerals hematite (Fe203) has distinct spectral curves in the visible near-infrared image (VNIR), which is caused by absorptions and induced by crystal field transitions at about 465 nm, 650 nm and 850–950 nm (Townsend, 1987). The paper presents an attempt for mapping iron oxides in Chitradurga Schist belt by using the Hyperion image. The iron distribution mapping is made with the standardized hyperspectral methodologies. An attempt is also made by taking the spectra of iron in-vitro and compared it with the USGS spectral libraryfor mappingiron distribution. The Spectral Angle Mapper Classification (SAM) is an automated method of comparing the image spectra with the individual spectra, or a spectral library (Boardman 1992; Kruse et al 1993). SAM treats both individual spectra, spectral library spectra and calculates as vectors and its spectral angle. Since the SAM algorithm uses the only vector direction and not the vector length. The result of the SAM classification is an image showing the best match at each pixel. This method is typically used for determining the mineralogy and works better in the areas of identical regions. The USGS maintains a large spectral library composed of mineral and soil types, which has image spectra and can be compared directly. 1.1 Study Area and image data The lithology of the Chitradurga schist belt 13036’25’’N and 760 35’49’’E belongs to both Bababudan and Chitradurga Groups. (Figure 1) The Bababudan Group of rocks represented by metabasalt-quartzite formations and NNW trending synclinal Kibbanahalli BIF formation, wrapping around the Chikkanayakanahalli (CN Halli) gneiss and joining the main CN Halli belt near Dodguni (Radhakrishna, 1967; Srinivasan and Sreenivas, 1975; Seshadri et al., 1981; Ramakrishnan and Vaidynadhan, 2008). Chitradurga Group covers most of the CN Halli schist belt, represented by quartz-sericite-chlorite schist, quartzite, carbonates, Mn formations and BIF overlies Bababudan Group (Devaraju and Anantha Murthy, 1976, 1977). EO-1 Hyperion level 1 radiometric (L1R) product having 242 bands covering CN Halli area acquired on 14 April 2011 was used. The image covers the spectral range of 0.4 to 2.5Â µm at 10 nm bandwidth. However, only 155 of them are calibrated from visible-to-infrared (VNIR) and short wave-infrared (SWIR) regions. (Table 1) (EO-1 User Guide, 2003).

Baptism :: essays research papers

Baptism is a religious ritual that some people choose to practice. Baptism is a belief that once done you start a new spiritual life. There ways to perform this ritual, which is considered sacred among the people that follow the religion of Christianity. Baptism has three processes. The first process is preparation. The second process is performing the Baptism. The last process is the conclusion of the baptism.   Ã‚  Ã‚  Ã‚  Ã‚  In order to perform a baptism, you have to prepare. The preacher has to see why the individual wants to commit their self to the Lord. Next, the individual has to inform the preacher why they want to give their self to the lord. Committing yourself to the lord is an important decision. Once the preacher agrees that the individual is true to their self and the Lord, the preacher sets aside a date for which the person shall be baptized.   Ã‚  Ã‚  Ã‚  Ã‚  Once the date is meet, the baptism proceeds. In order for a baptism to happen the individual must have on garments they won’t mind getting wet. Also, the preacher gives the individual white robs as a ceremonial garment ; the white garment must be worm over the person’s clothing. Once the garments are in place, the pastor then performs the baptism ceremony. The pastor first gives the individual a name of a saint, which the name shall be his example and protector. Next, the pastor dips water upon the individual’s head three times. The pastor then anoints the individual on the head, this practice symbolizes true love and peace. The individual then receives a taper to mark that he become a child of God.   Ã‚  Ã‚  Ã‚  Ã‚  Lastly, the conclusion of the baptism is performed. The pastor says a few words of inspiration to the individual or individuals that has been baptized. There is also a celebration to celebrate the rebirth of the newly reformed Christian.

Referring to your Wider Reading Essay

By Comparing Extracts A, B and C and Referring to your Wider Reading, Examine how Typical in both Style and Treatment of Subject Matter these writings are of Literature from or about the First World War The experiences of men and women within the war differed drastically, due to the different roles played by each gender; women lacked knowledge of the trauma undergone by soldiers on the frontline, due to their lack of personal experience. However, there was not only contrast between men and women in their attitudes and view of the war: Depending on the nature of their involvement in the war, attitudes of women were many and varied, as were those of men. Written by Jessie Pope, a writer well-known for the propaganda portrayed by her poetry throughout the war, ‘Who’s for the Game?’ harbours an extremely motivational, patriotic tone. This is due to the fact that Pope was commissioned to write poems that would encourage young men to join up and fight for their country. As such, this poem illustrates Pope’s utilisation of certain literary techniques in order to rouse an arguably ill-founded passion inside young men to fight to defend their country. Pope’s use of rhetorical questions throughout this poem acts as a gripping device, and holds the attention of the reader; ‘Who’s for the game, the biggest that’s played, The red, crashing game of a fight?’ †¦Who’ll give his country a hand?’ As well as demonstrating Pope’s use of rhetorical questions and the patriotism within her poetry, this quote also illustrates her technique of comparing the brutal war to a sport’s ‘game’, which is further supported by her statement; ‘Who’ll grip and tackle the job unafraid?’ in which sport’s terminology is utilised, in order to enable her target audience, the young men of the time, to relate to what is being said: Sport’s games were popular amongst boys of the early Twentieth Century, and by comparing the war to a such a game, Pope appeals to these boys. The above quote also demonstrates Pope’s technique of challenging the masculinity of the young men, as she implies that those who don’t fight are cowards, again this is further developed by the statement; ‘Who would much rather come back on a crutch Than lie low and be out of the fun?’ As she was ignorant of the brutality of the reality of war, Pope’s idealisation of, and her naà ¯Ã‚ ¿Ã‚ ½ve, patriotic approach to the war enraged many of those who were actively involved in the fighting. World War One poet, Wilfred Owen, particularly despised Pope for her habit of romanticising the aspects of war that she was ignorant of. He was in fact so passionate about his dislike for her that he directly addresses her, in ‘Dulce et Decorum Est’, when he states, ‘If you could hear†¦the blood Come gargling from the froth corrupted lungs†¦ My friend, you would not tell with such high zest To children ardent for some desperate glory The old Lie: Dulce et decorum est Pro patria mori’. Expressing a similar attitude to that of Pope, Marian Allen glorifies the war in her poem, ‘The Wind on the Downs’, in which she speaks of her inability to accept the death of a loved one. In support of this subject matter, a disbelieving, longing tone is conveyed, with a sense of naivety also conveyed by Pope in ‘Who’s for the Game’. This naivety is present due to the lack of personal experience that these two writers have had of the brutal reality of the First World War. As Pope remained on the home front in order to write poetry for the newspapers, Allen was typical of many more women at the time of the war; she remained at home whilst her lover went to fight in the war, and consequently she had view of war that was such due to the propaganda portrayed by the media and writers such as Pope. Allen’s use of soft and endearing language develops this idea of Allen as a naà ¯Ã‚ ¿Ã‚ ½ve writer in terms of the War, as her failure to accept her lover’s death is symbolic of her genuine ignorance to the nature of his death, and in fact life, whilst serving. The repetition of this denial towards her loss reinforces this point; ‘You have not died, it is not true†¦ That you are round about me, I believe†¦ How should you leave me, having loved me so?†¦ It seemed impossible that you should die’. That we’re introduced to the concept of his death through her line, ‘Because they tell me, dear, that you are dead,’ carries with it an air of denial, due to her expression that she was told, and not that she actually believes it herself. The line would be much less effective had it said ‘Because you are dead’. Allen’s idealisation of her lover and his life in, and out of the war, may be due to the manner in which she received the news of his death, and how little of the truth she was told. This is a subject directly addressed by Siegfried Sassoon in ‘The Hero’, as he speaks of the ‘gallant lies’ an officer had delivered to the mother of a soldier who had actually died a horrific death. It is portrayed by Allen that her and her lover ‘thought of many things and spoke of few’ when he returned home on leave, thereby conveying that he found it difficult to speak of the truth to her. This seeming feeling of not being able to confide in anyone one the home front was common amongst soldiers in the First World War. R.C Sherriff demonstrates it in his play ‘Journey’s End’ through Stanhope’s reluctance to take leave, and Susan Hill illustrates it through Hilliard’s emotional isolation from his family in ‘Strange Meeting’, as he cannot even speak to his sister of the ‘nightmares’ he encounters whilst at home on leave. Had Allen known the honest nature of her lover’s death, and life at war, she may have expressed a different view through this poem. Vera Brittain did gain an insight into the reality of what life must have been like for the men at war, through receiving her dead fiancà ¯Ã‚ ¿Ã‚ ½Ã¢â‚¬â„¢s uniform via post. The refined view she adopted of the war was aided by the condition of the uniform; ‘damp and worn and simply caked with mud’, exhibiting the ‘hole’ made by the bullet that killed him. These quotes are taken from Extract C, an extract from ‘Letters from a Lost Generation’. In this particular letter, Brittain is writing to her brother about the terrible ordeal of examining the uniform, an experience that proved to be somewhat revelatory for Brittain, as it was this following the loss of her fiancà ¯Ã‚ ¿Ã‚ ½ that spurred her to join up and become a V.A.D. Brittain composed this letter in 1916, which was a pivotal year within the war; a year in which many attitudes of those who previously supported the war were manipulated by its seeming newfound futility. Owen expresses in ‘Futility’, ‘Was it for this the clay grew tall?’ which strongly conveys his view that the war became superfluous, and that the Earth did not develop to be destroyed in such a brutal, futile way. Siegfried Sassoon also made a famous declaration stating his opposition to the continuation of the War in 1917, as a result of events in 1916, such as the infamous ‘Battle of the Somme’. This declaration, and therefore Sassoon’s change of view towards the war is a component of Pat Barker’s ‘Regeneration’. The form of a letter allows Brittain to utilise several literary techniques, such as varying sentence lengths and use of the five senses to create impact. Effective examples of blunt sentences used by Brittain are, ‘It was terrible’ And ‘No, they were not him’. These two statements demonstrate how Brittain made use of short sentences in order to reflect the blunt, direct nature in which her realisation of the reality of war hit her. In contrast to these short sentences, Brittain displays many complex sentences in order to convey a vivid image of the scene of the uniform before her; ‘The mud of France which covered them was not ordinary mud; it had not the usual clean, pure smell of earth, but it was as though it were saturated with dead bodies- dead that had been dead a long, long time.’ This sentence illustrates Brittain’s use of powerful adjectives, such as ‘saturated’, to strengthen her intended effect, and her application of the repletion of ‘long’, and ‘dead’, in order to emphasise certain factors of what she is conveying. Varying sentence lengths is not a facet of either Allen’s ‘The Wind on the Downs’ or Pope’s ‘Who’s for the Game’. This is due to these extracts taking the forms of poems, which makes it difficult for such a technique to be applied. However, Pope manages to exploit her chosen form of a poem in order to aid her purpose. She imposes a strong marching rhythm, which is supported by the typical ABAB rhyme scheme, thereby giving her poem a sense of soldiers marching to war, which can be perceived by the young men reading it. Similarly, Allen makes use of a regular rhyme scheme in order to give her poem fluidity and enhance the idealised depiction of death, which inevitably highlights Allen’s ignorance to the truth of conditions at war. Pope employs simple language and colloquialisms in her poem, due to its form and audience: As it appeared in a national newspaper, the audience was broad, and so the use of simple language meant the poem would appeal to everyone. The colloquialisms, such as ‘lie low’ ‘†¦give his country a hand’ illustrate Pope’s ability to relate to her intended audience, as boys of the time would find this language common and therefore easy to relate to. The patriotism conveyed by Pope is also illustrated through the latter of the two colloquialisms above. This patriotic attitude was shared by Rupert Brooke, as is conveyed through his poem, ‘The Soldier’ when he writes; ‘A dust whom England bore, shaped, made aware, Gave, once, her flowers to love, her ways to roam’ Brooke died of dysentery before carrying out any active service in the war, and therefore, he too was ignorant of the true conditions of life in the trenches. Thus, his poetry often illustrated naivety and patriotism, similar to others, like Pope and Allen, who were ignorant of the brutal reality of war. Through comparing these three texts we can consequently deduce that although one would assume women to have adopted a romantic view towards the act of fighting for one’s country due to their lack of active involvement in the war, there were actually a range of views produced amongst women as a result of the first world war, expressed through their various pieces of literature.

Just Mercy By Bryan Stevenson - 2043 Words

The start of the book, Just Mercy, grabbed me pretty quick, but I was thinking â€Å"why are we reading a book about a lost soul who is going to spend his time with people who are sentenced to die for the horrible crimes they committed?† I soon started to realize the true story was much more than that and I would read a story about right and wrong and receive a message about the goodness and mercy of humans towards each other. The story is told by Bryan Stevenson, the author and a graduate of Harvard Law, who was looking for something bigger to do in his life when he was a freshman in law school. He found it during an internship in Georgia at the Southern Prisoners Defense Committee or SPDC, an organization that fought for the basic rights of†¦show more content†¦Stevenson also writes about teenagers, including Charlie, who are sentenced to life as adults and serve in horrible conditions. Charlie was 14 and tried as an adult for capital murder, and the man he killed h ad just beaten Charlie’s mother unconscious. The case of Charlie introduces Stevenson to mercy in the fact that an elderly white couple hears Stevenson speak at church and they want to help Charlie by paying for his GED and college education. The story of misrepresented and unfairly judged people continues and so does the story of Walter McMillan. The continued evolution of evidence and the overwhelming number of witnesses who provide McMillan with an iron clad alibi make you wonder how on earth he could have ever been found guilty and in the end, with tremendous effort and support from Stevenson and his team, McMillan is released and the DA drops all charges against him. The question I kept asking is how many men and women are in jail today because of bias and poor representation? Bryan Stevenson’s story is inspiring and it should challenge us to get closer to difficult subjects before we cast judgment. The first connection I made to lecture and the text book came ear ly in Just Mercy when Stevenson told about his background an upbringing. Stevenson described southern coastal Delaware, a place you think of as a vacation destination on the Atlantic coast, based on his experience growing up.Show MoreRelatedJust Mercy By Stevenson Bryan Essay1297 Words   |  6 PagesJust Mercy was written in 2014 by Stevenson Bryan. This story takes place in Montgomery Alabama. This story is about the broken system of justice. How people are judged unfairly even in the supreme Court. Bryan Stevenson primarily focuses on death penalty cases and juveniles sentenced to life or death. He provides relief for those incarcerated also, he understands the need to fix this criminal justice system by focusing on poverty, and racial disparities. Stevenson chooses cases that did not receiveRead MoreBryan Stevenson : Just Mercy1453 Words   |  6 Pages Bryan Stevenson: Just Mercy Maya Pimentel Middle College High School Intro Many are put onto death row without actually having a fighting chance to plead their case, provide the full story, and prove their innocence. Bryan Stevenson is a lawyer who fights for those who have been left for dead and aren’t given a second chance. Bryan Stevenson is a social justice activist, the founder and executive director of the Equal Justice Initiative, and a clinical professorRead MoreJust Mercy By Bryan Stevenson1742 Words   |  7 PagesThe novel, Just Mercy, by Bryan Stevenson covers many aspects of the legal system, including Stevenson’s quest to get prisoners who were convicted as adolescents out of adult prison. Through Stevenson’s experiences, he sees first hand experience of children that are sent to adult prisons. Specifically he saw how the prisoners who were convicted as children revert to a very low mental state and often have a great deal of trouble readjusting if they are even remotely capable of doing so. One of theseRead MoreJust Mer cy By Bryan Stevenson993 Words   |  4 Pagesâ€Å"Just mercy† written by Bryan Stevenson is a story about â€Å"justice and redemption†(title). Bryan Stevenson tells the story about Walter McMillian a convicted murder. McMillian was unjustly charged for the murder of Ronda Morrison by Ralph Myers even though there was clear evidence that McMillian did not commit this murder. McMillian’s story proves the inequities in the American justice system, and Stevenson proves the faults in the system by telling McMillian’s story. â€Å"Proximity has taught me someRead MoreJust Mercy By Bryan Stevenson1654 Words   |  7 PagesChildren Are Not Adults The novel, Just Mercy, by Bryan Stevenson covers many aspects of the legal system, including Stevenson’s quest to get prisoners who were convicted as adolescents out of adult prison. Later, Stevenson sees how the prisoners who were convicted as children revert to a very low mental state and often have a great deal of trouble readjusting if they are even remotely capable of doing so. Children should never be pushed into adult prisons or receive adult punishments because ofRead MoreJust Mercy By Bryan Stevenson1633 Words   |  7 PagesIn the novel, Just Mercy, by Bryan Stevenson, Stevenson explains his quest to get prisoners, who were originally convicted when they were adolescents, out of adult prison. Later, Stevenson sees how the prisoners who were convicted as children revert to a very low mental state and often have a great deal of trouble readjusting if they are even remotely capable of doing so. That is why children should never be pushed into adult prisons or receive a dult punishments because of their lack of brain developmentRead MoreJust Mercy By Bryan Stevenson1519 Words   |  7 Pages Bryan Stevenson, author of Just Mercy, is a lawyer from the rural south that advocates for mostly children on death row. He spends most of his time in low income communities with next to no hope. His TED talk was based on his experiences in these communities, his career, and his knowledge regarding minorities while addressing his predominately financially stable, White audience. Trying to persuade an audience that is not effected by what you are trying to speak against is hard, however, Bryan StevensonRead MoreJust Mercy By Bryan Stevenson1963 Words   |  8 Pagesconsidered lives at all? 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