Discuss attitudes to love + marriage in Pride and Prejudice essays

Discuss attitudes to love + marriage in Pride and Prejudice essays Set in late 18th Century Regency England, Pride and Prejudice is the portrait of the struggles of women finding the inevitable husband and of a society that believes in male superiority. Through Elizabeth Bennets lively intelligence and desire in finding a man she truly loves there is the contrast of her best friend, Charlotte Lucas marrying for convenience. Austen depicts the views of love and marriage in a time that matrimony to a gentleman of wealth was the goal of most womens lives: A ladys imagination is very rapid; it jumps from admiration to love, from love to matrimony in a moment. We can see the importance of marriage from the start of the novel, Its influence over the characters and events of the novel is hinted at in the ironic opening sentence: It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife. Through Pride and Prejudice, Jane Austen portrays the commonly held beliefs about marriage at the time. She does this through her use of characters and their individual views on marriage and love. Societys view of marriage is evident through the many characters who express monetary views of the sacred institution. She uses Elizabeth Bennet to show the contrast between marriage for love and marriage of the era. Elizabeth Bennets views were very much disregarded at that time. Jane Austen uses this contrast to show happiness is more often found in Elizabeth Bennets idealistic views than in taking a chance with a man of good fortune. Elizabeth Bennets idealistic views are that she wants to marry for love. Many girls may feel similarly to Elizabeth Bennet but in the serial climate of the time of Pride and Prejudice, if a good marriage was offered she would accept. For example, Charlotte Lucas. Charlotte Lucas is the eldest child ...

Admiral John Jellicoe in World War I

Admiral John Jellicoe in World War I John Jellicoe - Early Life Career: Born December 5, 1859, John Jellicoe was the son of Captain John H. Jellicoe of the Royal Mail Steam Packet Company and his wife Lucy H. Jellicoe.   Initially educated at Field House School in Rottingdean, Jellicoe elected to pursue a career in the Royal Navy in 1872.   Appointed a cadet, he reported to the training ship HMS Britannia at Dartmouth.   After two years of naval schooling, in which he finished second in his class, Jellicoe was warranted as a midshipman and assigned to the steam frigate HMS Newcastle.   Spending three years aboard, Jellicoe continued to learn his trade as the frigate operated in the Atlantic, Indian, and western Pacific Oceans.   Ordered to the ironclad HMS Agincourt in July 1877, he saw service in the Mediterranean. The following year, Jellicoe passed his exam for sub-lieutenant placing third out of 103 candidates.   Ordered home, he attended the Royal Naval College and received high marks.   Returning to the Mediterranean, he transferred aboard the Mediterranean Fleets flagship, HMS Alexandra, in 1880 before receiving his promotion to lieutenant on September 23.   Moving back to Agincourt in February 1881, Jellicoe led a rifle company of the Naval Brigade at Ismailia during the 1882 Anglo-Egyptian War.   In mid-1882, he again departed to attend courses at the Royal Naval College.   Earning his qualifications as a gunnery officer, Jellicoe was appointed to the staff of the Gunnery School aboard HMS Excellent in May 1884.   While there, he became a favorite of the schools commander, Captain John Jackie Fisher.       John Jellicoe - A Rising Star: Serving on Fishers staff for a Baltic cruise in 1885, Jellicoe then had brief stints aboard HMS Monarch and HMS Colossus before returning to Excellent the following year to head the experimental department.   In 1889, he became assistant to the Director of Naval Ordnance, a post held at that time by Fisher, and aided in obtaining sufficient guns for the new ships being built for the fleet.   Returning to sea in 1893 with the rank of commander, Jellicoe sailed aboard HMS Sans Pareil in the Mediterranean before transferring to the fleets flagship HMS Victoria.   On June 22, 1893, he survived Victorias sinking after it accidentally collided with HMS Camperdown.   Recovering, Jellicoe served aboard HMS Ramillies before receiving a promotion to captain in 1897.    Appointed a member of the Admiraltys Ordnance Board, Jellicoe also became captain of the battleship HMS Centurion.   Serving in the Far East, he then left the ship to act as chief of staff to Vice Admiral Sir Edward Seymour when the latter led an international force against Beijing during the Boxer Rebellion.   On August 5, Jellicoe was severely wounded in the left lung during the Battle of Beicang.   Surprising his doctors, he survived and received an appointment as a Companion of the Order of the Bath and was awarded the German Order of the Red Eagle, 2nd class, with Crossed Swords for his exploits.   Arriving back in Britain in 1901, Jellicoe became Naval Assistant to the Third Naval Lord and Controller of the Navy before assuming command of HMS Drake on the North American and West Indies Station two years later. In January 1905, Jellicoe came ashore and served on the committee that designed HMS Dreadnought.   With Fisher holding the post of First Sea Lord, Jellicoe was appointed Director of Naval Ordnance.   With the launching of the revolutionary new ship, he was made a Commander of the Royal Victorian Order.   Elevated to rear admiral in February 1907, Jellicoe assumed a position as second-in-command of the Atlantic Fleet.   In this post for eighteen months, he then became Third Sea Lord.   Supporting Fisher, Jellicoe argued strenuously for expanding the Royal Navys fleet of dreadnought battleships as well as advocated for the construction of battlecruisers.   Returning to sea in 1910, he took command of the Atlantic Fleet and was promoted to vice admiral the following year.   In 1912, Jellicoe received an appointment as Second Sea Lord in charge of personnel and training. John Jellicoe - World War I: In this post for two years, Jellicoe then departed in July 1914 to act as second-in-command of the Home Fleet under Admiral Sir George Callaghan.   This assignment was made with the expectation that he would assume command of the fleet late that fall following Callaghans retirement.   With the beginning of World War I in August,  First Lord of the Admiralty Winston Churchill removed the older Callaghan, promoted Jellicoe to admiral and directed him to take command.   Angered by the treatment of Callaghan and concerned that his removal would lead to tension in the fleet, Jellicoe repeatedly attempted to turn down the promotion but to no avail.   Taking command of the newly-renamed Grand Fleet, he hoisted his flag aboard the battleship HMS Iron Duke.   As the battleships of the Grand Fleet were critical for protecting Britain, commanding the seas, and maintaining the blockade of Germany, Churchill commented that Jellicoe was the only man on either side who could lose the wa r in an afternoon. While the bulk of the Grand Fleet made its base at Scapa Flow in the Orkneys, Jellicoe directed Vice Admiral David Beattys 1st Battlecruiser Squadron to remain further south.   In late August, he ordered critical reinforcements to aid in concluding the victory at the Battle of Heligoland Bight and that December directed forces to attempt to trap Rear Admiral Franz von Hippers battlecruisers after they attacked Scarborough, Hartlepool, and Whitby.   Following Beattys victory at Dogger Bank in January 1915, Jellicoe began a waiting game as he sought an engagement with the battleships of  Vice Admiral Reinhard Scheers High Seas Fleet.   This finally occurred in late May 1916 when a clash between Beatty and von Hippers battlecruisers led the fleets to meet at the Battle of Jutland.   The largest and only major clash between dreadnought battleships in history, the battle proved inconclusive.   Though Jellicoe performed solidly and made no major mistakes, the British public was disappointed not to win a victory on the scale of Trafalgar.   Despite this, Jutland proved a strategic victory for the British as the German efforts failed to break the blockade or significantly reduce the Royal Navys numerical advantage in capital ships.   Additionally, the result led to the High Seas Fleet effectively remaining in port for the rest of the war as the Kaiserliche Marine shifted its focus to submarine warfare.   In November, Jellicoe turned the Grand Fleet over to Beatty and traveled south to assume the post of First Sea Lord.   The Royal Navys senior professional officer, this position saw him quickly tasked with combating Germanys return to unrestricted submarine warfare in February 1917. John Jellicoe - Later Career: Assessing the situation, Jellicoe and the Admiralty initially resisted adopting a convoy system for merchant vessels in the Atlantic due to a lack of suitable escort vessels and concerns that merchant mariners would be unable to keep station.   Studies that spring eased these concerns and Jellicoe approved plans for a convoy system on April 27.   As the year progressed, he became increasingly tired and pessimistic and fell afoul of Prime Minister David Lloyd George.   This was worsened by a lack of political skill and savvy.   Though Lloyd George desired to remove Jellicoe that summer, political considerations prevented this and action was further delayed in the fall due to the need to support Italy following the Battle of Caporetto.   Finally, on Christmas Eve, First Lord of the Admiralty Sir Eric Campbell Geddes dismissed Jellicoe.   This action enraged Jellicoes fellow sea lords all of whom threatened to resign.   Talked out this action by Jellicoe, he left his post. On March 7, 1918, Jellicoe was elevated to the peerage as Viscount Jellicoe of Scapa Flow.   Though he was proposed as Allied Supreme Naval Commander in the Mediterranean later that spring, nothing came it as the post was not created.   With the end of the war, Jellicoe received a promotion to admiral of the fleet on April 3, 1919.   Traveling extensively, he aided Canada, Australia, and New Zealand in developing their navies and correctly identified Japan as a future threat.   Appointed Governor-General of New Zealand in September 1920, Jellicoe held the post for four years.   Returning to Britain, he was further created  Earl Jellicoe and Viscount Brocas of Southampton in 1925.   Serving as president of the Royal British Legion from 1928 to 1932, Jellicoe died of pneumonia on November 20, 1935.   His remains were interred at St. Pauls Cathedral in London not far from those of Vice Admiral Lord Horatio Nelson. Selected Sources: BBC: John JellicoeFirst World War: John JellicoeHistory of War: John Jellicoe

Why 70s generated and accepted new definitions for family structures Essay

Why 70s generated and accepted new definitions for family structures and gender roles - Essay Example This meant that even servants were part of the family (Ellwood and Christopher, 34). In the present structure, even the non-parental adults qualify as family members as long as they are actively involved in the upbringing of the children of others. The implication of this is that there is no universal definition of family. One of the reasons is the fact that the family has evolved over the years. In the middle ages, the nuclear family was the most common family setup. Ideally, a nuclear family consisted of the father, the mother and the children. However, there were some instances around the same time where sets of nuclear families resided together. The family in the United States has also seen a high degree of evolution. The evolution was mainly as a result of the changing perceptions in the culture of marriage starting from as early as the 18th century (Furstenberg, 34). Most views on family change are usually not representative of the facts on the ground. For instance, there has been a general increase in single-parent situations since the 1970s. This is mainly attributed to out of wedlock and fatherless children. The American society largely views the changes in gender roles as well as the new family definitions to be mainly caused by three factors namely, economic factors, development factors and last but not least, moral factors (Furstenberg, 40). The economic problems of single motherhood are mainly stemmed in the fact that very few single moms can actually get a good wage. In addition to this, they have to juggle between their professional deities as well as their role of upbringing their children. This ultimately reduces the amount of money they make at the end of a typical month. The government often offers some financial support to single mothers but the money is not usually substantial. These are the main reasons why the issue of

Pacific Science Center Long Report Essay Example | Topics and Well Written Essays - 2250 words

Pacific Science Center Long Report - Essay Example For instance, the center recently engaged in a 13-month trip dubbed â€Å"Around the Americas†, in an effort to research and raise the public’s awareness about the fragile nature of our oceans hence the need to protect and preserve them. The science center is also associated with beneficial community based science programs, which are meant to encourage children and the public at large to appreciate the role of science in society. Some of these include the Science Cafà © and Science on Wheels programs. Further, the center continues to display exhibits that thrill guests and inspire their engagement in scientific projects. One such exhibit is Science on a Sphere, which is an intriguing technological tool that makes use of video projectors and computers to show animated picture of Earth’s atmosphere, land and oceans. The center is guided by its strong mission statement, which asserts that the role of PACSCI is to stir a lifetime interest in science, technology, engineering and math (STEM) through creative and interactive science programs and exhibits. The center further envisions communities where adults and children are motivated by science, understand its primary principles, and apply scientific inquiry and knowledge in practical life situations. This paper explores PACSCI’s position in the American science museum sector, by using analytical tools like SWOT and competition analysis; while further providing recommendations on what the center should do to appeal to a g reater audience and maintain its prominence. The Pacific Science Center stemmed from the US Science Pavilion popularized by the Seattle World’s Fair in 1962. PACSCI is, therefore, a pioneer in the scientific museum sector. This is because the center began as a technology and science depository, with large halls full of interactive scientific demonstrations and practical exhibits, and employees or volunteers trained to respond to guests’

Comparing Hate in The Jewel in the Crown and Wuthering Heights :: comparison compare contrast essays

Hate in The Jewel in the Crown and Wuthering Heights While reading the two works, The Jewel in the Crown and Wuthering Heights, it was impossible to miss the blatant prejudice. The terms used to describe other races were offensive, I also noticed the treatment of many of the characters because of their skin color. One of the novels was set in 1801 and the other in 1942 still they both illustrate horrid prejudices. Emily Bronte's Wuthering Heights is a classic novel from the 1800's. It was shocking at first to read about the Gypsy boy that Mr. Earnshaw brought home referred to as." a gift of God, though it's as dark almost as if it came from the devil." (Pg 28. Bronte, Emily. Wuthering Heights. Norton Critical ed. 3rd ed. Ed William M. Sale, jr., and Richard J. Dunn. New York: W.W. Norton, 1990) Not once in the first meeting of this child did they call him a child or even as him they referred to him as "it" (Pg 28,29. Bronte, Emily. Wuthering Heights. Norton Critical ed. 3rd ed. Ed William M. Sale, jr., and Richard J. Dunn. New York: W.W. Norton, 1990) When Mr. Earnshaw was explaining why he brought the boy home he used phrases like "seeing it starving" "inquired for its owner" and "whom it belonged". (Pg 29. Bronte, Emily. Wuthering Heights. Norton Critical ed. 3rd ed. Ed William M. Sale, jr., and Richard J. Dunn. New York: W.W. Norton, 1990) The horrible way the people thought about the Gypsy child Heathcliff offended me at first and then I remembered the period of the novel. That was unfortunately, standard practice for the era although despicable normal for the era. The trend continued for one hundred years because the novel The Jewel in the Crown had the same tones about the Indian people in the novel. Lady Chatterjee was not allowed in a club because she was an Indian. (Pg 106 Scott, Paul. The Jewel in the Crown. [1996.] Vol. 1 of the Raj Quartet. Rpt. Chicago: University of Chicago Press, 1998.) Many times in this novel, as well there are blatant prejudices. Sister Ludmila felt it "an unnatural context the attraction of white to black, the attraction of an opposite" of a white woman and an Indian (black) man. (Pg 150 Scott, Paul. The Jewel in the Crown.

Spinal Cord Injuries And Treatments Health And Social Care Essay

IntroductionMusculoskeletal system is an organ system that includes bone and gristle, musculuss, sinews, ligaments and articulations. Low back spinal column hurts can be breaks which affect the bone, herniation which affect the disc, sprain which affects ligaments or musculuss. ( Truumees, 2007 ) . Common hurts of the spinal column are associated with falls from a tallness and motor vehicle accidents. When a force is exerted to the lumbar spinal column and exceeds the stableness and strength of the spinal column it consequences in a break. ( Nadalo, 2007 ) . In injury this can ensue in encroachment of the nervousnesss and can do cauda equina syndrome. Cauda equina syndrome involves failing in the legs, vesica palsy and intestine. ( Larson & A ; Maiman, 1999 ) . Harmonizing to Truumees 2007, there is a scope of breaks that are linked with the spinal column. These scope from compaction breaks, where the bone collapses to when pieces of bone explode into the tissue known as explosion breaks. Fracture disruptions are the worst as the castanetss interruption and skid off from each other, ligaments are torn as good. Normally these state of affairss require surgery. Primary imagination protocol for look intoing spinal pathology comprises conventional skiagraphy, CT, and MRI. ( Kim, 2009 ) .Anatomy part:The spinal cord extends from the hiatuss magnum to L1-L2 phonograph record infinite. It is uninterrupted with the myelin oblongata and terminates in the conus medullaris. Below this degree the nerve roots running inferiorly are jointly called the cauda equina. The cauda equina tallies within the spinal canal, which is bordered interiorly by the vertebral organic structures and posterior by the dorsal bony arch, ( Vaccaro, 2003 ) . The membranous beds covering the spinal cord are referred to as the meninxs. The meninxs consist of three beds ; the Dura, arachnoid and Indian arrowroot mater. The Dura is attached interiorly to the posterior longitudinal ligament. The Indian arrowroot mater is composed of a superficial bed epi-pia and a deep bed pia-glia, ( Clark & A ; Letts, 2001 ) . The first alterations evident in spinal cord anatomy following traumatic hurt are punctate bleedings in the grey and white affair. The motion of the lumbar spinal column is mostly confined to flexure and extension with a minor grade of rotary motion. The part between the superior articular procedure and the lamina is the pars interaticularis, ( Nadalo, 2007 ) .PathophysiologyAs indicated above the breaks of the lumbar spinal column occur any clip the combined forces of compaction, distraction, and rotary motion exceed the strength of the spinal column. The prevailing force determines the nature of the break disruption. It is common that axial rotary motion occurs in the upper lumbar part. With great rotational forces, subluxation and a combined break occur and this consequences with the hurt to the conus medullaris. Compaction of the conus medullaris and nervus roots consequences in failing and hurting, ( Clark & A ; Letts, 2001 ) . Any hurt that involves the spinal cord is serious. If the conus medullaris is injured patients will hold jobs with the intestine, vesica and sexual map. A group of single nervousnesss called cauda equina are found below the conus medullaris. Pressure on these nervousnesss can do long term leg failing, intestine and vesica jobs therefore is treated as an exigency, ( Truumees, 2007 ) . Spinal intervertebral phonograph record distribute the forces that travel through the whole spinal column. They lie between two next vertebral organic structures and act as daze absorbers. Disc herniation or ecstasies occur when the inner nucleus pulposus ruptures through the diminished ring ( outer beds ) of the phonograph record. Disc herniation in the lower dorsum can be due to trauma. Symptoms include lower back hurting, leg hurting, numbness or weakening and prickling of one or both legs. In serious instances nervousnesss to the intestine and vesica can be compressed taking to incontinence, ( Knaub, 2007 ) . Compaction from big cardinal lumbar phonograph record herniation at L4/5 and L5/S1 degree is a common cause of cauda equina. Thickening of the ligamentum flavum and degenerative alterations as a consequence of spinal stricture is another cause of cauda equina. Spinal hurt with breaks or subluxation is another less common cause. Compaction can besides be caused by spinal tumor of metastatic lesions, ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) . The symptoms are less prognostic although they are associated with the damage of the vesica, intestine and sexual map and to some extend perianal ( saddle numbness ) . Cauda equina consequences from disfunction of many sacral and lumbar nervus roots. It is besides believed to be caused by interverbral phonograph record herniation. Loss of perianal sensory and sphincter perturbation and this could be with or without urinary keeping. Complete cauda equina has established urinary keeping or flood and uncomplete cauda equina there is decreased urinary esthesis, ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) . With disc herniation, if the degenerative procedure advancements, little circumferential crevices develop in the fibrosus, which subsequently coalesce to organize radial, tear. Differentiation between focal bulge of disc stuff and a circumferential expansion is of import, as the former is typically treated surgically, whereas the later can be treated cautiously. Disc herniat ion refers to a focal, uncomplete extension of the contents of the nucleus pulposus through an uncomplete tear of the annulus fibrosus, ( Lee, 2006 ) .Brief lineation of Imaging techniques/protocolsImagination ProbeImagination of the spinal column can be performed by conventional skiagraphy ( CR ) , ultrasound ( US ) , computerised imaging ( CT ) , digital minus angiography ( DSA ) or magnetic resonance imagination ( MRI ) . With conventional skiagraphy, anteroposterior ( AP ) , sidelong and oblique projections of the vertebral column should be obtained. CR provide valuable information sing bony constructions of the spinal column, facet articulations, phonograph record infinites, and foramina while limited information sing the paraspinal soft tissues can be obtained. The spinal cord is good seen with US in the first few months of life, ( Browner, 2003 ) . Multislice CT demonstrates the vertebral column, vascular constructions and disc really good together with better visual image of the spinal cord and paraspinal soft tissues while conventional CT demonstrates the vertebral organic structure and posterior elements really good with merely limited visual image of the soft tissue and spinal cord. DSA is still the gilded criterion for imaging and interventional processs of spinal vascular constructions. DSA is clip devouring, invasive technique that has the disadvantages of high degrees of radiation. MRI imagination has become the mode of pick for imagination of the spinal cord, thecal pouch, nervus roots, extradural infinite, vascular constructions, nervous hiatus, vertebral organic structure, intervertebral phonograph record, facet articulations, spinal ligaments and paraspinal soft tissue, ( Goethem, Hauwe & A ; Parizel, 2007 ) . Injury patients with hurting in the lumbar sacral part necessitate sidelong and AP radiologic positions. If these surveies are negative but clinical symptoms are impressive, farther imagination by CT is indicated. CT is helpful in characterizing complex hurts such as break disruptions and in separating burst breaks from anterior compaction breaks. Acute oncoming of radicular symptoms after acute injury may justify CTM or MRI to except acute intervertebral phonograph record herniation, ( Browner, 2003 ) .Diagnostic value including image visual aspectsPLAIN FILM RAD OF THE LUMBAR SPINE:Radiographic rating starts with the AP and sidelong radiogram. When clinically inappropriate a horizontal beam with the patient recumbent is taken alternatively of the sidelong place. Initial rating of the overall alliance of the thoracolumbar junction and lumbar spinal column is clearly assessed with a sidelong skiagraphy taken in the supine place. Many breaks demonstrate non merely a comminution of the vertebral organic structure but besides a local country of humpback. Oblique projections should be obtained merely when the AP and sidelong radiogram are inconsistent with the clinical rating. The patient ‘s status must besides let the rotary motion into the oblique place. The oblique projections provide first-class visual image of the pars interaticularis and the aspect articulations, ( Browner, 2003 ) . When viewed in an oblique projection, the lineation of the aspects and the pars interaticularis appear like the cervix of a Scottie Canis familiaris, ( Nadalo, 2007 ) . Soft tissue swelling may bespeak a break even if the break is non straight visualized. Structures that are best seen on the oblique positions include the cross procedure and pedicel on the dependent side and the pars interaticularis. Plain X beam is advantageous as it is readily available and cheap. It besides provide a rapid appraisal of a specific spinal part and depending on the patient ability, weight bearing and dynamic positions possibly obtained. Conventional skiagraphy is utile in corroborating normal osteal constructions, vertebral alliance and structural unity of the spinal column, ( Devlin, 2003 ) . On the contrary field x beam has low sensitiveness and specificity in placing diagnostic spinal pathology. It can non visualize nervous constructions and other soft tissue lesions ( disc herniation ) . It is limited in the diagnosing of early phase tumor or infection because important bone devastation must happen before a radiographic abnormalcy is noticeable, ( Devlin, 2003 ) .CT OF THE SPINECT allows images to be obtained in any plane to show the pathology in inquiry. Multi-planar computed imaging is CT with routinely obtained sagittal and coronal reformatted images. Multi-planar CT including three dimensional CT is presently the imagination technique of pick for spinal hurt. The value of CT is in the axial image, which demonstrates the nervous canal and the relationship of the break fragments to the canal. Axial information obtained in the supine patient are converted electronically into images displayed in the sagittal and coronal planes, without necessitating motion of the patie nt. ( Browner, 2003 ) Thin-section axial CT scanning with a bone algorithm is the individual most sensitive agencies by which to name breaks of the lumbar spinal column. Everyday coiling CT scans of the lumbar spinal column are valuable because multi-section CT scanners can bring forth high-resolution spinal images, even during a primary multi-systemic rating for injury. Good-quality CT images can be used to place more lumbar spinal column hurts than conventional radiographic surveies, ( Oskouian, & A ; Johnson, 2002 ) . CT is known to be the best for bone anatomy appraisal and the usage of multiple transverse sectional images which can be reconstructed to supply images in extraneous planes is an added advantage. It is the chief replacement when MRI is contraindicated, ( Devlin, 2003 ) . The disadvantages of CT follow the exposure to ionising radiation. It provides hapless word picture of nervous elements and next constructions. Ligaments, phonograph record, dural pouch, and nervus roots appear as different sunglassess of grey. Significant pathology can be missed. Sagittal images are non routinely reconstructed at many establishments, ( Devlin, 2003 ) .MRI OF SPECIFIC ACUTE SPINE INJURY:MRI is alone in its ability to observe acute hurt to the spinal cord. Fat appears bright on T1 images and less bright on T2 images. T1 images are good for measuring constructions that contain fat, bleeding or proteinaceous fluid as they demonstrate high signal. T2 images are leaden towards H2O. Water appears bright on T2 images and dark on T1 images. T2 images are most utile in contrasting normal and unnatural anatomy, ( Devlin, 2003 ) . Atlas 2008, suggest that cord odema appears isointense in relation to the normal spinal cord on T1-weighted spin reverberation images but becomes brighter than normal spinal cord on T2-weighted image sequences. MRI signals have the ability to place the histopathology of acute spinal cord hurt. MRI depicts normal ligaments as parts of low signal strength because of deficiency of nomadic H. Break of the ligament is seen on MRI scans as an disconnected break of the low signal, ligament fading or stretching of ligament, association of a lacerate ligament with an attached avulsed bone fragment, ( Browner, 2003 ) . The focal point is normally on spinal constructions when construing spinal column MRI scrutinies and merely the everyday sagittal and axial images are used. Coronal lookout images are acquired for localization of function intent before each everyday lumbar spinal column MRI scrutiny. This everyday normally includes the hip articulations and proximal thighbones, ( Lavelle & A ; Bell, 2007 ) . Acute intervertebral phonograph record herniation may attach to breaks or disruptions or may happen as an stray lesion. If the phonograph record impinges on the spinal cord or roots, a neurologic hurt may ensue. MRI presentation of a single-level acute intervertebral phonograph record herniation is important in surgical direction in spinal injury to optimize neurologic recovery, ( Browner, 2003 ) . Lumbar spinal column MRI can show many vertebral breaks and most abnormalcies of alliance. MRI is superior to CT in the designation of indirect marks of a break such as pre-cervical hydrops or bleeding, extradural hemorrhage, and sprains of the paraspinal and intra-spinal ligaments. Associated hurts to intracranial constructions are evaluated better by utilizing MRIs than by utilizing CT images, ( Jarvik, Bowen & A ; Ross, 2001 ) . MRI avoids ionising radiation and provides imaging in extraneous planes which makes it advantageous over other modes. It can be used to visualize an full spinal part and avoids missed pathology at passage zones between next spinal parts. It besides provides keen soft tissue item and first-class visual image of intrathecal nervous elements. MRI is sensitive to marrow abnormalcies, ( Atlas, 2008 ) . Contrary MRI does non specify osteal anatomy every bit good as CT. Implanted devices are contraindications to MRI and claustrophobic patients may hold trouble because of the little diameter of the imagination machine, ( Devlin, 2003 ) .Contribution to direction and intervention of the disease ( including consideration of patient issues and the wider context of healthcare proviso )Treatment and Management:The chief intervention for unstable lumbar spinal column breaks is surgical arrested development with spinal canal decompression as needed. A posterior attack involves pedicular arrested development in which 2 sections are fused. The process consequences in both fracture decrease and arrested development. The injured vertebra is grafted through the pedicel. Clearance of bone fragments from within the spinal canal is an of import end for most surgical attacks to lumbar spine breaks. Patients with complete paraplegia can be expected to stay unchanged. As for cauda equina syndrome surgical decompression is recommended after verification by MRI imagination of reversible cause of force per unit area. ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) .Research/Developments within diagnostic imagination ( lending to the above )New MR imaging techniques such as diffusion ( DWI ) , perfusion ( PWI ) , functional imagination ( FMRI ) and magnetic resonance spectrometry ( MRS ) provide more specific, elaborate and physiological information about the spinal column and spinal cord and besides enable quantitative rating. Contrast enhanced ( high dosage ) spinal MRA is a really promising technique, peculiarly for testing scrutinies of the spinal venas and arterias. ( Goethem, Hauwe & A ; Parizel, 2007 ) . The betterments in CT engineering, introduced with coiling CT and the newer multi-detector array systems create the potency for CT to supply showing of the thoracic and lumbar spinal column as portion of a everyday thoracic pit and abdominal-pelvic CT survey in a multiple injury patient. Single-slice or coiling CT used in concurrence with lookout AP and sidelong radiogram may finally supply more accurate designation of lumbosacral hurts than is achieved with conventional skiagraphy, ( Browner, 2003 ) . The development of the multi-slice CT engineering with 0.5 2nd gauntry rotary motion allows up to eight axial images to be acquired per second is expected to spread out to more images per second in the close hereafter. Addition of more sensor arrays is anticipated to take to farther additions in the velocity of image acquisition and betterments in image quality, ( Browner, 2003 ) . Bone scan utilizing RNI and extra trials will include Bone densitometry. Dual energy x-ray absorptiometry ( DEXA ) is used to measure bone mass Truumees, E. ( 2007 ) . Understanding lumbar spinal column injury. United States: Stryker Devlin, V. J. , 2003. Spine secrets. Elsevier Health Sciences Nadalo, L. A. , 2007. Lumbar spinal column, injury. Texas, USA: American College of Radiology. Larson, S. J. and Maiman, D. ( 1999 ) . Surgery of the lumbar spinal column. New York: Thieme Vaccaro, A. R. ( 2003 ) . Fractures of the cervical, thoracic, and lumbar spinal column. United Kingdom: Informa Health Care Knaub, M. A. ( 2007 ) . Understanding lumbar phonograph record herniation. United States: Stryker Kim, H. S. , ( 2009 ) . Critical hip upsets show up on spinal imagination surveies: Lookout images illuminate excess spinal lesions, guide scrutiny and assist forestall misdiagnosis of back hurting. The diary of musculoskeletal medical specialty ( UBM Medica ) : Diagnostic Imaging Asia Pacific. Vol. No. July 1, 2009. Lavelle, W. F. and Bell, G. R. Musculoskeletal conditions that may mime spinal pathology, a diagnostic quandary. SpineLine 2007 ; 8 ( 6 ) :14-20 BMJ 11/04/2009 volume 338 Lavy, C. , James, A. , Wilson-MacDonald, J. and Fairbank, J. 2009. Cauda equina syndrome. Goethem, J. W. M. , Hauwe, L. and Parizel, P. , ( 2007 ) . Spinal imagination: Diagnostic imagination of the spinal column and spinal cord. Germany: Springer Berlin Heidelberg. Browner, B. D. , ( 2003 ) skeletal injury: basic scientific discipline, direction, and Reconstruction. USA: Elsevier Health Sciences Lee, J. K. T. , ( 2006 ) . Computed organic structure imaging with MRI correlativity. Philadelphia, USA: Lippincott Williams & A ; Wilkins Clark, P. and Letts, M.A Trauma to the thoracic and lumbar spinal column in the adolescent.A Can J Surg.A OctA 2001 ; 44 ( 5 ) :337-45.A [ Medline ] . Atlas, S. W. , 2008. Magnetic resonance imagination of the encephalon and spinal column. Lippincott Williams & A ; Wilkins. Oskouian, R. J. and Johnson, J.P.A Vascular complications in anterior thoracolumbar spinal reconstruction.A J Neurosurg.A JanA 2002 ; 96 ( 1 Suppl ) :1-5.A [ Medline ] . Jarvik, J.G. , Bowen, B. and Ross, J. , 2001. Practice guideline for the public presentation of magnetic resonance imagination ( MRI ) of the grownup spinal column. ACR pattern guidelines and proficient criterions 2001. Spinal Cord Injuries And Treatments Health And Social Care Essay IntroductionMusculoskeletal system is an organ system that includes bone and gristle, musculuss, sinews, ligaments and articulations. Low back spinal column hurts can be breaks which affect the bone, herniation which affect the disc, sprain which affects ligaments or musculuss. ( Truumees, 2007 ) . Common hurts of the spinal column are associated with falls from a tallness and motor vehicle accidents. When a force is exerted to the lumbar spinal column and exceeds the stableness and strength of the spinal column it consequences in a break. ( Nadalo, 2007 ) . In injury this can ensue in encroachment of the nervousnesss and can do cauda equina syndrome. Cauda equina syndrome involves failing in the legs, vesica palsy and intestine. ( Larson & A ; Maiman, 1999 ) . Harmonizing to Truumees 2007, there is a scope of breaks that are linked with the spinal column. These scope from compaction breaks, where the bone collapses to when pieces of bone explode into the tissue known as explosion breaks. Fracture disruptions are the worst as the castanetss interruption and skid off from each other, ligaments are torn as good. Normally these state of affairss require surgery. Primary imagination protocol for look intoing spinal pathology comprises conventional skiagraphy, CT, and MRI. ( Kim, 2009 ) .Anatomy part:The spinal cord extends from the hiatuss magnum to L1-L2 phonograph record infinite. It is uninterrupted with the myelin oblongata and terminates in the conus medullaris. Below this degree the nerve roots running inferiorly are jointly called the cauda equina. The cauda equina tallies within the spinal canal, which is bordered interiorly by the vertebral organic structures and posterior by the dorsal bony arch, ( Vaccaro, 2003 ) . The membranous beds covering the spinal cord are referred to as the meninxs. The meninxs consist of three beds ; the Dura, arachnoid and Indian arrowroot mater. The Dura is attached interiorly to the posterior longitudinal ligament. The Indian arrowroot mater is composed of a superficial bed epi-pia and a deep bed pia-glia, ( Clark & A ; Letts, 2001 ) . The first alterations evident in spinal cord anatomy following traumatic hurt are punctate bleedings in the grey and white affair. The motion of the lumbar spinal column is mostly confined to flexure and extension with a minor grade of rotary motion. The part between the superior articular procedure and the lamina is the pars interaticularis, ( Nadalo, 2007 ) .PathophysiologyAs indicated above the breaks of the lumbar spinal column occur any clip the combined forces of compaction, distraction, and rotary motion exceed the strength of the spinal column. The prevailing force determines the nature of the break disruption. It is common that axial rotary motion occurs in the upper lumbar part. With great rotational forces, subluxation and a combined break occur and this consequences with the hurt to the conus medullaris. Compaction of the conus medullaris and nervus roots consequences in failing and hurting, ( Clark & A ; Letts, 2001 ) . Any hurt that involves the spinal cord is serious. If the conus medullaris is injured patients will hold jobs with the intestine, vesica and sexual map. A group of single nervousnesss called cauda equina are found below the conus medullaris. Pressure on these nervousnesss can do long term leg failing, intestine and vesica jobs therefore is treated as an exigency, ( Truumees, 2007 ) . Spinal intervertebral phonograph record distribute the forces that travel through the whole spinal column. They lie between two next vertebral organic structures and act as daze absorbers. Disc herniation or ecstasies occur when the inner nucleus pulposus ruptures through the diminished ring ( outer beds ) of the phonograph record. Disc herniation in the lower dorsum can be due to trauma. Symptoms include lower back hurting, leg hurting, numbness or weakening and prickling of one or both legs. In serious instances nervousnesss to the intestine and vesica can be compressed taking to incontinence, ( Knaub, 2007 ) . Compaction from big cardinal lumbar phonograph record herniation at L4/5 and L5/S1 degree is a common cause of cauda equina. Thickening of the ligamentum flavum and degenerative alterations as a consequence of spinal stricture is another cause of cauda equina. Spinal hurt with breaks or subluxation is another less common cause. Compaction can besides be caused by spinal tumor of metastatic lesions, ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) . The symptoms are less prognostic although they are associated with the damage of the vesica, intestine and sexual map and to some extend perianal ( saddle numbness ) . Cauda equina consequences from disfunction of many sacral and lumbar nervus roots. It is besides believed to be caused by interverbral phonograph record herniation. Loss of perianal sensory and sphincter perturbation and this could be with or without urinary keeping. Complete cauda equina has established urinary keeping or flood and uncomplete cauda equina there is decreased urinary esthesis, ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) . With disc herniation, if the degenerative procedure advancements, little circumferential crevices develop in the fibrosus, which subsequently coalesce to organize radial, tear. Differentiation between focal bulge of disc stuff and a circumferential expansion is of import, as the former is typically treated surgically, whereas the later can be treated cautiously. Disc herniat ion refers to a focal, uncomplete extension of the contents of the nucleus pulposus through an uncomplete tear of the annulus fibrosus, ( Lee, 2006 ) .Brief lineation of Imaging techniques/protocolsImagination ProbeImagination of the spinal column can be performed by conventional skiagraphy ( CR ) , ultrasound ( US ) , computerised imaging ( CT ) , digital minus angiography ( DSA ) or magnetic resonance imagination ( MRI ) . With conventional skiagraphy, anteroposterior ( AP ) , sidelong and oblique projections of the vertebral column should be obtained. CR provide valuable information sing bony constructions of the spinal column, facet articulations, phonograph record infinites, and foramina while limited information sing the paraspinal soft tissues can be obtained. The spinal cord is good seen with US in the first few months of life, ( Browner, 2003 ) . Multislice CT demonstrates the vertebral column, vascular constructions and disc really good together with better visual image of the spinal cord and paraspinal soft tissues while conventional CT demonstrates the vertebral organic structure and posterior elements really good with merely limited visual image of the soft tissue and spinal cord. DSA is still the gilded criterion for imaging and interventional processs of spinal vascular constructions. DSA is clip devouring, invasive technique that has the disadvantages of high degrees of radiation. MRI imagination has become the mode of pick for imagination of the spinal cord, thecal pouch, nervus roots, extradural infinite, vascular constructions, nervous hiatus, vertebral organic structure, intervertebral phonograph record, facet articulations, spinal ligaments and paraspinal soft tissue, ( Goethem, Hauwe & A ; Parizel, 2007 ) . Injury patients with hurting in the lumbar sacral part necessitate sidelong and AP radiologic positions. If these surveies are negative but clinical symptoms are impressive, farther imagination by CT is indicated. CT is helpful in characterizing complex hurts such as break disruptions and in separating burst breaks from anterior compaction breaks. Acute oncoming of radicular symptoms after acute injury may justify CTM or MRI to except acute intervertebral phonograph record herniation, ( Browner, 2003 ) .Diagnostic value including image visual aspectsPLAIN FILM RAD OF THE LUMBAR SPINE:Radiographic rating starts with the AP and sidelong radiogram. When clinically inappropriate a horizontal beam with the patient recumbent is taken alternatively of the sidelong place. Initial rating of the overall alliance of the thoracolumbar junction and lumbar spinal column is clearly assessed with a sidelong skiagraphy taken in the supine place. Many breaks demonstrate non merely a comminution of the vertebral organic structure but besides a local country of humpback. Oblique projections should be obtained merely when the AP and sidelong radiogram are inconsistent with the clinical rating. The patient ‘s status must besides let the rotary motion into the oblique place. The oblique projections provide first-class visual image of the pars interaticularis and the aspect articulations, ( Browner, 2003 ) . When viewed in an oblique projection, the lineation of the aspects and the pars interaticularis appear like the cervix of a Scottie Canis familiaris, ( Nadalo, 2007 ) . Soft tissue swelling may bespeak a break even if the break is non straight visualized. Structures that are best seen on the oblique positions include the cross procedure and pedicel on the dependent side and the pars interaticularis. Plain X beam is advantageous as it is readily available and cheap. It besides provide a rapid appraisal of a specific spinal part and depending on the patient ability, weight bearing and dynamic positions possibly obtained. Conventional skiagraphy is utile in corroborating normal osteal constructions, vertebral alliance and structural unity of the spinal column, ( Devlin, 2003 ) . On the contrary field x beam has low sensitiveness and specificity in placing diagnostic spinal pathology. It can non visualize nervous constructions and other soft tissue lesions ( disc herniation ) . It is limited in the diagnosing of early phase tumor or infection because important bone devastation must happen before a radiographic abnormalcy is noticeable, ( Devlin, 2003 ) .CT OF THE SPINECT allows images to be obtained in any plane to show the pathology in inquiry. Multi-planar computed imaging is CT with routinely obtained sagittal and coronal reformatted images. Multi-planar CT including three dimensional CT is presently the imagination technique of pick for spinal hurt. The value of CT is in the axial image, which demonstrates the nervous canal and the relationship of the break fragments to the canal. Axial information obtained in the supine patient are converted electronically into images displayed in the sagittal and coronal planes, without necessitating motion of the patie nt. ( Browner, 2003 ) Thin-section axial CT scanning with a bone algorithm is the individual most sensitive agencies by which to name breaks of the lumbar spinal column. Everyday coiling CT scans of the lumbar spinal column are valuable because multi-section CT scanners can bring forth high-resolution spinal images, even during a primary multi-systemic rating for injury. Good-quality CT images can be used to place more lumbar spinal column hurts than conventional radiographic surveies, ( Oskouian, & A ; Johnson, 2002 ) . CT is known to be the best for bone anatomy appraisal and the usage of multiple transverse sectional images which can be reconstructed to supply images in extraneous planes is an added advantage. It is the chief replacement when MRI is contraindicated, ( Devlin, 2003 ) . The disadvantages of CT follow the exposure to ionising radiation. It provides hapless word picture of nervous elements and next constructions. Ligaments, phonograph record, dural pouch, and nervus roots appear as different sunglassess of grey. Significant pathology can be missed. Sagittal images are non routinely reconstructed at many establishments, ( Devlin, 2003 ) .MRI OF SPECIFIC ACUTE SPINE INJURY:MRI is alone in its ability to observe acute hurt to the spinal cord. Fat appears bright on T1 images and less bright on T2 images. T1 images are good for measuring constructions that contain fat, bleeding or proteinaceous fluid as they demonstrate high signal. T2 images are leaden towards H2O. Water appears bright on T2 images and dark on T1 images. T2 images are most utile in contrasting normal and unnatural anatomy, ( Devlin, 2003 ) . Atlas 2008, suggest that cord odema appears isointense in relation to the normal spinal cord on T1-weighted spin reverberation images but becomes brighter than normal spinal cord on T2-weighted image sequences. MRI signals have the ability to place the histopathology of acute spinal cord hurt. MRI depicts normal ligaments as parts of low signal strength because of deficiency of nomadic H. Break of the ligament is seen on MRI scans as an disconnected break of the low signal, ligament fading or stretching of ligament, association of a lacerate ligament with an attached avulsed bone fragment, ( Browner, 2003 ) . The focal point is normally on spinal constructions when construing spinal column MRI scrutinies and merely the everyday sagittal and axial images are used. Coronal lookout images are acquired for localization of function intent before each everyday lumbar spinal column MRI scrutiny. This everyday normally includes the hip articulations and proximal thighbones, ( Lavelle & A ; Bell, 2007 ) . Acute intervertebral phonograph record herniation may attach to breaks or disruptions or may happen as an stray lesion. If the phonograph record impinges on the spinal cord or roots, a neurologic hurt may ensue. MRI presentation of a single-level acute intervertebral phonograph record herniation is important in surgical direction in spinal injury to optimize neurologic recovery, ( Browner, 2003 ) . Lumbar spinal column MRI can show many vertebral breaks and most abnormalcies of alliance. MRI is superior to CT in the designation of indirect marks of a break such as pre-cervical hydrops or bleeding, extradural hemorrhage, and sprains of the paraspinal and intra-spinal ligaments. Associated hurts to intracranial constructions are evaluated better by utilizing MRIs than by utilizing CT images, ( Jarvik, Bowen & A ; Ross, 2001 ) . MRI avoids ionising radiation and provides imaging in extraneous planes which makes it advantageous over other modes. It can be used to visualize an full spinal part and avoids missed pathology at passage zones between next spinal parts. It besides provides keen soft tissue item and first-class visual image of intrathecal nervous elements. MRI is sensitive to marrow abnormalcies, ( Atlas, 2008 ) . Contrary MRI does non specify osteal anatomy every bit good as CT. Implanted devices are contraindications to MRI and claustrophobic patients may hold trouble because of the little diameter of the imagination machine, ( Devlin, 2003 ) .Contribution to direction and intervention of the disease ( including consideration of patient issues and the wider context of healthcare proviso )Treatment and Management:The chief intervention for unstable lumbar spinal column breaks is surgical arrested development with spinal canal decompression as needed. A posterior attack involves pedicular arrested development in which 2 sections are fused. The process consequences in both fracture decrease and arrested development. The injured vertebra is grafted through the pedicel. Clearance of bone fragments from within the spinal canal is an of import end for most surgical attacks to lumbar spine breaks. Patients with complete paraplegia can be expected to stay unchanged. As for cauda equina syndrome surgical decompression is recommended after verification by MRI imagination of reversible cause of force per unit area. ( Lavy, James, Wilson-MacDonald & A ; Fairbank, 2009 ) .Research/Developments within diagnostic imagination ( lending to the above )New MR imaging techniques such as diffusion ( DWI ) , perfusion ( PWI ) , functional imagination ( FMRI ) and magnetic resonance spectrometry ( MRS ) provide more specific, elaborate and physiological information about the spinal column and spinal cord and besides enable quantitative rating. Contrast enhanced ( high dosage ) spinal MRA is a really promising technique, peculiarly for testing scrutinies of the spinal venas and arterias. ( Goethem, Hauwe & A ; Parizel, 2007 ) . The betterments in CT engineering, introduced with coiling CT and the newer multi-detector array systems create the potency for CT to supply showing of the thoracic and lumbar spinal column as portion of a everyday thoracic pit and abdominal-pelvic CT survey in a multiple injury patient. Single-slice or coiling CT used in concurrence with lookout AP and sidelong radiogram may finally supply more accurate designation of lumbosacral hurts than is achieved with conventional skiagraphy, ( Browner, 2003 ) . The development of the multi-slice CT engineering with 0.5 2nd gauntry rotary motion allows up to eight axial images to be acquired per second is expected to spread out to more images per second in the close hereafter. Addition of more sensor arrays is anticipated to take to farther additions in the velocity of image acquisition and betterments in image quality, ( Browner, 2003 ) . Bone scan utilizing RNI and extra trials will include Bone densitometry. Dual energy x-ray absorptiometry ( DEXA ) is used to measure bone mass Truumees, E. ( 2007 ) . Understanding lumbar spinal column injury. United States: Stryker Devlin, V. J. , 2003. Spine secrets. Elsevier Health Sciences Nadalo, L. A. , 2007. Lumbar spinal column, injury. Texas, USA: American College of Radiology. Larson, S. J. and Maiman, D. ( 1999 ) . Surgery of the lumbar spinal column. New York: Thieme Vaccaro, A. R. ( 2003 ) . Fractures of the cervical, thoracic, and lumbar spinal column. United Kingdom: Informa Health Care Knaub, M. A. ( 2007 ) . Understanding lumbar phonograph record herniation. United States: Stryker Kim, H. S. , ( 2009 ) . Critical hip upsets show up on spinal imagination surveies: Lookout images illuminate excess spinal lesions, guide scrutiny and assist forestall misdiagnosis of back hurting. The diary of musculoskeletal medical specialty ( UBM Medica ) : Diagnostic Imaging Asia Pacific. Vol. No. July 1, 2009. Lavelle, W. F. and Bell, G. R. Musculoskeletal conditions that may mime spinal pathology, a diagnostic quandary. SpineLine 2007 ; 8 ( 6 ) :14-20 BMJ 11/04/2009 volume 338 Lavy, C. , James, A. , Wilson-MacDonald, J. and Fairbank, J. 2009. Cauda equina syndrome. Goethem, J. W. M. , Hauwe, L. and Parizel, P. , ( 2007 ) . Spinal imagination: Diagnostic imagination of the spinal column and spinal cord. Germany: Springer Berlin Heidelberg. Browner, B. D. , ( 2003 ) skeletal injury: basic scientific discipline, direction, and Reconstruction. USA: Elsevier Health Sciences Lee, J. K. T. , ( 2006 ) . Computed organic structure imaging with MRI correlativity. Philadelphia, USA: Lippincott Williams & A ; Wilkins Clark, P. and Letts, M.A Trauma to the thoracic and lumbar spinal column in the adolescent.A Can J Surg.A OctA 2001 ; 44 ( 5 ) :337-45.A [ Medline ] . Atlas, S. W. , 2008. Magnetic resonance imagination of the encephalon and spinal column. Lippincott Williams & A ; Wilkins. Oskouian, R. J. and Johnson, J.P.A Vascular complications in anterior thoracolumbar spinal reconstruction.A J Neurosurg.A JanA 2002 ; 96 ( 1 Suppl ) :1-5.A [ Medline ] . Jarvik, J.G. , Bowen, B. and Ross, J. , 2001. Practice guideline for the public presentation of magnetic resonance imagination ( MRI ) of the grownup spinal column. ACR pattern guidelines and proficient criterions 2001.

Physics - 3271 Words

Measurement and Measurement Error PHYS 1313 S06 Prof. T.E. Coan Version: 16 Jan ’06 Introduction Physics makes both general and detailed statements about the physical universe and these statements are organized in such a way that they provide a model or a kind of coherent picture about how and why the universe works the way it does. These sets of statements are called â€Å"theories† and are much more than a simple list of â€Å"facts and figures† like you might find in an almanac or a telephone book (even though almanacs and telephone books are quite useful). A good physics theory is far more interested in principles than simple â€Å"facts.† Noting that the moon appears regularly in the night sky is far less interesting than†¦show more content†¦Understanding and quantifying measurement error is important in experimental science because it is a measure of how seriously we should believe (or not believe) our theories abut how the physical universe works. If I measure my mass to be 120.317 kilograms, that is a very precise measurement because it is very specific. It also happens to be a very inaccurate measurement because I am not quite that fat. My mass is considerably less, something like 85 kilograms. So, when we say that we have made a precise measurement we can also say that we have made a very specific measurement. When we say we have made an accurate measurement we are saying that our answer is close to the true value of the quantity. When we make measurements in the laboratory we should therefore distinguish between the precision and the accuracy of these measurements. The so-called number of significant figures (â€Å"sig figs†) that a measurement contains indicates its the precision. In our mass example, the quantity 120.317 kilograms has 6 significant figures. This is rather precise as measurements go and is considerably more precise than anything you will ever measure in this course. 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