The Portrayal of Murder in The Speckled Band and Lamb to the Slaughter :: Sherlock Holmes Arthur Doyle Roald Dahl Essays

The Portrayal of Murder in The Speckled Band and Lamb to the Slaughter The two stories we are comparing are the 1880`s Sherlock Homes murder mystery tail "The Speckled Band" and the second story is the1900`s thriller "Lamb to the Slaughter". The Speckled Band is an on the edge murder mystery tail, this is one of the many Sherlock Homes tails, it was written by Sir Arthur Conan Doyle in the late Victorians 180`s. Lamb to the Slaughter is a very short thriller, this story was written by the great child's Author Roald Dahl in the 1950`s. In this essay we are not comparing the two stories we are comparing and contrasting the two murders which are. In "Lamb to the Slaughter" the murderer is Mrs Mary Maloney, Mrs Maloney is a pretty woman about 5ft with long dark hair and big brown eyes. She is six months pregnant and is a very loving and caring woman who is extremely organised. The victim that Mrs Maloney killed was none other than her Husband Mr Maloney. Mary new that her husband was having an a affair with another Woman, so when Mr Maloney came home from work one night Mrs Maloney lashed out and smashed her husband around the back of his head with an frozen leg of lamb that she had just taken out of the freezer for supper. Mrs Maloney immediately put the frozen leg of lamb in the Oven and then called the police and told them that her husband had been murdered while she was out. After she killed her husband she went into her bedroom and sat there for half an hour thinking of what to do and say to the police. In the end she thought up of a story, she went out of the house 2 get some Items for the meal when she got back she saw her husband and called the police. When the police arrived she said that while she was out he was murdered, the police checked up on that and it was true. The police tried 2 find the murder weapon around the house and garden and after there search Mrs Maloney insisted that they ate the food she had cooked because she was not up to it, so they did the 3 police officers ate the lamb and the evidence they had spent all day looking for. So in the end Mrs Maloney made up a story before she called the police and after she had murdered Mr Maloney and she got away with murder. The Second story "The Speckled Band" the murderer was Doctor Grimesby

Benefits of Using Laser Communication Technology Essay

Laser communication, often referred to as free-space optics (FSO) or free-space laser (FSL) communication, is similar to fiber optic cable in terms of carrier wavelength and bandwidth capability, but data are transmitted directly through the atmosphere via laser beams over paths from a few meters to 4 km or longer. FSL uses lasers in the near-infrared spectrum, typically at wavelengths of 850 or 1550 nm. Given these wavelengths, atmospheric attenuation must be considered, and an adequate margin of optical power (dB) must exist to support high system availability (the percentage of time that an FSL link is in operation, typically 99.9%). A visual range of 100 m can attenuate a laser beam at a rate of nearly 130 dB km−1. For short links (< 1200 m), fog and low clouds are the primary concerns. For longer links, scintillation, heavy rain, and snow frequently become issues. To address these issues, long-term climate data are analyzed to determine the frequency of occurrence of low visibilities and low-cloud ceilings. To estimate availability at a site of interest, adjustments to airport climate data are made to accommodate differences in altitude, geography, and the effects of the urban heat island. In sum, communication via FSL is a feasible alternative to fiber optic cable when atmospheric conditions are considered and properly analyzed. Polarization shift keying (PolSK) is a new modulation technique, it uses the state of polarization of an electromagnetic wave carrier as the information bearing parameter. This paper describes a modulation/demodulation method based on PolSK, and a high-speed laser communication system, and verifies its feasibility through theoretical analysis and computer simulation. Studies have shown that the based on the parameters of laser polarization modulation and demodulation techniques have unique advantages, such as in anti-atmospheric interference, higher data rate and lower bit error rate, greatly improving the reliability of communication. In addition to polymorphism modulation can be achieved by this modulation method, which has a data capacity. In the future, the PolSK modulation and differential demodulation method has a broad space for development and application prospects in the space laser communications. Research Background The technology of laser communication was concerned by great nation in the world, because of its advantage of good security, building network conveniently, large communication capacity, smallness and portable, low power consumption and the other advantages. With the achievement of micro-arc order dynamic tracking technology, in order to develop its potentials and advantages further, high-rate and long distance became the new directions of the development of the laser communication. The technology of laser communication combined some more mature technologies of high speed optical fiber communication technology, such as front optical amplification, wavelength division multiplexing, diversity reception and the all-optical network technology, which also brought new problems into the air light coupled into optical fiber. Because of the effects of the deviation of the alignment, vibration and atmosphere, it was difficult to achieve high efficiency of air light coupled into optical fiber for tiny diameter of core of the fiber. Thus, big diameter of core of the fiber should be chosen. As the limit of the devices, the detective area of the detector of the high speed optoelectronic detector was difficult to achieve above 100ÃŽ ¼m. Therefore, it’s necessary to optimize the diameter of fiber core and the detective area. At the same time, in order to lighten and lessen the optical platform and void some practical problems such as the high frequency interference and the moment of the wire-wound, it’s necessary to estimate and solve the loss of optical docking to optimize the high efficiency and speed received system of the atmospheric laser communication. In the paper, the high-efficiency and high-speed receiver technology of atmospheric laser communication was analyzed, which was based on ideal and atmospheric condition. For which, the received system of the atmospheric laser communication and its main parameters were discussed and the effects of the atmospheric on the laser communication with high efficiency and velocity were analyzed. Besides, the factors were also discussed, which affected the space light coupling into the fiber and fiber docking coupling and the corresponding simulation results were given. The method was proposed, which was used to solve the problems of the atmospheric laser communication, and the results of the indoor fiber docking coupling were analyzed so that it was feasible and efficient. The experiment of the maximum coupling efficiency about the atmosphere was carried out and the effects of the atmospheric on the experimental results were discussed. Modern lasers represent a massive improvement over lasers of the past, and the technology is advancing just as quickly now as it has been for the past decade. Optical fiber has demonstrated the ability to move hundreds of terabits of information per second. In addition, lasers are able to see through dense foliage, and can allow for space communication from distances measured in millions of miles. The capabilities of modern lasers almost are like science-fiction stories, and the technology involved is still improving Statement of the Problem This paper aims to identify the benefits of laser communication technology. The objective of these communication projects is to service personal communication users almost everywhere on Earth. The inter-satellite links in those projects use microwave radiation as the carrier. Free-space optical communication between satellites networked together can make possible high-speed communication between different places on Earth. Some advantages of an optical communication system over a microwave communication system in free space are: (1) smaller size and weight, (2) less transmitter power, (3) larger bandwidth, and (4) higher immunity to interference. The pointing from one satellite to another is a complicated problem due to the large distance between the satellite, the narrow beam divergence angle, and vibration of the pointing system. Such vibration of the transmitted beam in the receiver plane decreases the average received signal, which increases the bit error rate. We review: (1) the present status of satellite networks, (2) developing efforts of optical satellite communication around the world, (3) performance results of vibration effects on different kinds of optical communication satellite networks, and (4) seven approaches to overcome the problems caused by transmitter pointing vibration Methodology This paper aims to investigate the design and the benefits of using laser communication technology. Operation from a low earth orbit (LEO) platform (e.g., the International Space Station) would allow transmission of single photons and pairs of entangled photons to ground stations and hence permit quantum communication applications such as quantum cryptography on a global scale. Integration of a source generating entangled photon pairs and single-photon detection into existing optical terminal designs is feasible. Even more, major subunits of the classical terminals such as those for pointing, acquisition, and tracking as well as those providing the required electronic, thermal, and structural backbone can be adapted so as to meet the quantum communication terminal needs. Results and Discussion Common uses for lasers in sensing include determining precise location information that radar and traditional sighting systems for kinetic weapons like rifles and missiles cannot provide. â€Å"When using lasers with a weapon system they’re a complement to kinetic systems,† explains Michael Rinn, vice president of the Boeing Co. Directed Energy Systems segment in Albuquerque, N.M. Lasers â€Å"offer an advantage of cost-per-shot, precision ranging, and precision pointing,† Rinn continues. â€Å"From three, four, or five kilometers away a laser can focus on a moving target precisely. Radar and gun systems are nowhere near the kinds of ranges we’re demonstrating.† Of course, lasers aren’t a replacement for any system, but they serve to compliment systems by providing additional information. Light detection and ranging (LIDAR) is one of the primary ways lasers can sense objects and movement. LIDAR can create images by bouncing lasers off a targe t. Narrow-beam lasers enable LIDAR to detect images where other sensors could not, such as finding objects in heavy foliage or finding exact distances, heights, chemical compounds, and atmospheric composition. LIDAR not only provides this information, but also can render still images in three dimensions. Given sufficient processing power, lasers also can render moving images that look like videos. Scientists have used LIDAR to guide unmanned aerial vehicles (UAVs), including an AH-6 unmanned Little Bird light helicopter gunship, through areas with obstacles. LIDAR provides the precision necessary for autonomous piloting, a hot commodity at a time when UAVs require at least one operator. The AH-6 is a military version of the MD 500 light helicopter. As with any advancing technology — especially one that involves as much computation as laser technology does — the size of laser systems has shrunk to sizes that were unimaginable when they were first introduced. â€Å"We’re seeing leaps and bounds in the technology,† says Boeing’s Rinn. â€Å"Sizes have gone down from racks to credit-card size; you’re seeing a lot of transformation in the industry.† Early-model laser systems were big, awkward, and used too much power to make them practical for vehicles. Today’s lasers, however, can fit in small boxes and can be parts of UAV payloads, fixed-site perimeter-security systems, helicopters, and ground vehicles. Laser limitations Laser sensing does have a weakness, when compared to other kinds of sensors. â€Å"Heavy rain, really bad weather conditions, and sandstorms, cause problems for lasers,† explains Boeing’s Rinn. Adverse weather conditions prevent laser light from reaching its target. Even heat waves can distort the laser beam and lead to inaccurate or lost data. Fortunately, there is a way around atmospheric issues with lasers. The answer to this problem is an atmospheric-compensation sensor that uses a low-power beam before correcting itself. The now-discontinued Airborne Laser (ABL) program, for example, sent out a low-power laser before firing its powerful chemical laser. The low-power laser measured atmospheric distortion between the aircraft and its target, and used that information to calibrate the laser weapon to put the most energy possible on target. Atmospheric compensation enables the use of lasers even in harsh environments that would render uncorrected laser sensors useless. Atmospheric compensation does not allow lasers to function in particularly bad conditions, however. Atmospheric distortion happens when air currents or pollution bends light, and is the phenomenon that makes the stars at night appear to twinkle . Lasers for communications Fiber-optic cable has seen huge improvements in the past decade. With potential data rates that reach data rates of terabits per second, lasers can move vast quantities of data more securely than other forms of communications. Lasers are impervious to electromagnetic interference (EMI), do not emit stray signals like RF energy does, and fiber lasers are substantially lighter than copper cable. Fiber-optic cable â€Å"Is lighter, faster, smaller has no EMI and doesn’t cause sparks,† explains John Lee, vice president of marketing at optical fiber specialist Timbercon Inc. in Lake Oswego, Ore. â€Å"War fighters today have a huge appetite for data, if we don’t have the type of bandwidth fiber provides we won’t be giving our war fighters everything we can.† Lasers also have been used in communications without optical fiber. â€Å"Laser communication is a very specific application — satellite-to-satellite, terrestrial-to-satellite, terrestrial-to -airplane — are very high bandwidth applications that lasers can do.† Boeing’s Rinn says. Lasers can be used for communication without any cables to communicate from huge distances, particularly in space. This practice, called free-space optical communications, uses laser beams that travel through the air, or through outer space, instead through optical fiber, and is generating substantial industry excitement for its potential in broadband data communications. The NASA Jet Propulsion Laboratory (JPL) in Pasadena, Calif., in fact, has created its own free-space optical communications research group. More information on the NASA group is online at Free-space optical communications send lasers operating at wavelengths not visible to the human eye to receivers for high-bandwidth line-of-sight communications. The benefit of free-space optical communication over radio signals is clear. Free-space optical communication does not experience interference from radio waves and is nearly impossible for an enemy to intercept or disrupt. Free-space optical communication is particularly applicable to inter-satellite communications because it is relatively interference-free, offers better connections than RF signals, and travels for longer ranges. Lasers provide high-bandwidth communications links between satellites, deep-space probes, and orbiting telescopes using lasers, lenses, and mirrors, these connections allow for fast communication with receivers and transmitters. Some space-based free-space optical communications links operate reliably millions of miles apart. Inter-satellite communications links can send and receive data that are exponentially larger than RF signals can provide, while using less power. NASA’s own project, the Laser Communications Relay Demonstration, seeks to prove the long-term viability of free-space optical communication and increase current inter-satellite data rates by as much as a hundred times greater than current RF communication allows. The Laser Communications Relay Demonstration will be holding preliminary design review in 2013, with ground testing starting in 2014. The project will then fly as a commercial satellite payload in 2016. Future laser technology Laser technology has yet to mature, and many enhancements are left to be made. Everything lasers can do currently is still improving at a rapid rate and new techniques to improve lasers are still in the works. One such new technique is beam combining, which blends several laser streams into one high-power beam. â€Å"There are a lot of people chasing combining laser beams,† says Boeing’s Rinn. â€Å"There’s a lot of research and technology growth going on there.† Researchers are taking three approaches to combine laser beams: spectral beam combining, coherent beam combining and polarization beam combining. Each approach has its own uses, benefits, and downsides. The goal of beam combining is to increase laser power and brightness to enable long-distance communications and laser weapons. Beam combining techniques Polarization beam combining blends two linearly polarized laser beams — one vertically polarized and the other horizontally polarized. These beams move to a thin-film polarizer so that one is reflected and the other transmitted, forcing both beams to propagate in the same direction. This creates an unpolarized beam with almost the same optical power as the two input beams combined, and with the same beam quality. Brightness similarly increases. Polarized beam combining does not scale power, however, because the unpolarized output cannot go through the same process. â€Å"It is expected that beam-combined laser systems will in the near future reach output power levels of tens to hundreds of kilowatts,† Paschotta says. â€Å"Possible applications of such systems are in the military sector in the context of anti-missile and other directed energy laser weapons. There are also possibilities for long-distance free-space optical communication and laser-based manufacturing.â⠂¬  Conclusion In the free-space laser communication there is sometimes a strong need for reduction of the diffraction spot size in the far field. In this paper, instead of the usage of the larger size aperture lens in the free-space laser communication system, we introduce diffractive superresolution technology to design and fabricate a cheap pure-phase plate for realizing the smaller spot size than the usual Airy spot size, which can decrease the weight and size of the emitting lens. We have calculated 2, 3, 4, 5 circulation zones for optimizing the highest energy compression (Strehl ratio) with the constraint of the First zero ratio value G=0.8. Numerical results show that the 2- or 3-circular zone pure-phase plate can yield the highest Strehl ratio (S≈0.59) with the constraint of G=0.8, but the 4, 5 circular zone binary phase (0,Ï€) plates are calculated to yield the result ofS≈0.57 with G=0.8. We have fabricated 2- and 3-circular zone binary phase plate with binary optics technology. Finally, we have established an experimental system for simulation of the free-space laser communication to verify the advantage of the superresolution phase plate. Detailed experiments are presented. Factories use sensors to guarantee product quality. The advent of cell phones and constant communications with satellites has raised demands for better communications. The transoceanic fiber cables that sit at the bottom of the ocean, coupled with data demands that almost double yearly thanks to the explosion of streaming video has also led to more and more research being performed on optimizing optical communications and optics in general. Acknowledgement Foremost, I would like to express my sincere gratitude to my Teacher Madam Marlita delos Santos for the continuous support of my study, for his patience, motivation, enthusiasm, and immense knowledge. His guidance helped me in all the time.I could not have imagined having a better advisor and mentor for my study. Besides my Teacher, I would like to thank the rest of my teachers in Lope de Vega National High School for their encouragement, insightful comments, and hard questions. My sincere thanks also goes to my parent for their support and undying love to me so I can finish the secondary learning and I may able to achieve my dreams and ambitions. I thank my fellow Classmates, school mates, and friends for the stimulating discussions, for the sleepless nights we were working together before deadlines, and for all the fun we have had in the last four years. Last but not the least; I would like to thank God for his Guidance and Love for me and the World. The Writer Bibliography 1. Journal of Optical Networking, Vol. 4, Issue 9, pp. 549-560 (2005) 2. http://dx.doi.org/10.1364/JON.4.00 3. http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-4-9-5490549 4. http://lasers.jpl.nasa.gov. 5. M. Pfennigbauer, M. Aspelmeyer, W. Leeb, G. Baister, T. Dreischer, T. Jennewein, G. Neckamm, J. Perdigues, H. Weinfurter, and A. Zeilinger, â€Å"Satellite-based quantum communication terminal employing state-of-the-art technology,† J. Opt. Netw. 4, 549-560 (2005)

The Most Dangerous Game By Richard Connell - 1018 Words

Hunters and Hunters The story by Richard Connell â€Å"The most Dangerous Game† is a very thrilling, eventful story. Its full of many plot twists and turns. It focuses on one man s struggle for safety and another man s idea of what’s socially acceptable. He claims that there are two types of people. The hunters and the huntees. Zaroff believes that the weak people were only placed onto the earth to serve and please the stronger kind. Meaning he was a stronger person, and anyone he believes he is better than is worthless. Richard Connell s story, â€Å"The most Dangerous Game† Rainsford, a very skill and acquired big game hunter falls overboard a ship and swims to what he believes is safety. Boy was he wrong! He is walking and stumbles across a huge mansion. Thinking its vacant he enters, big mistake. In the mansion he meets the hunters. He later finds out they arent only hunting animals and he might just become their next victim. In this story Zaroff’s overconfidence will g et the best of him and he will not be very lucky. He claims he is the best hunter in the world and attempts to kill Rainsford and chases him all over the island. In this short story, the hunters are Zaroff and Ivan. They are the ones hunting down Rainsford and trying to kill him on the island. In the beginning Rainsford believes that Ivan and Zaroff just hunt large game. He is correct but that begins to bore zaroff and he moves onto to a more hard to catch pray, hence the title, â€Å"The Most Dangerous Game’Show MoreRelatedThe Most Dangerous Game By Richard Connell1398 Words   |  6 Pages Richard Connell s short work of fiction â€Å"The Most Dangerous Game† blurs the line between humans and animals and explores some of the causes of fear, especially the primal fear of being hunted. Appropriately, it is a suspense-driven work and relies heavily on the use of certain techniques to make sure the reader feels, or at least understands, the terror that the protagonist Sanger Rainsford feels. In the narrative, two techniques are combined to create suspense: careful use of foreshadowing createsRead MoreThe Most Dangerous Game By Richard Connell908 Words   |  4 Pagesscreenplay for a movie called High Noon; a classic tale of when the hunter becomes the hunted. Then in 1924, Richard Connell wrote another classic, called The Most Dangerous Game. Although both stories demonstrate similar examples of the setting and conflict, the main characters react very differently to the unusual situations they find themselves stuck in. High Noon and The Most Dangerous Game share many similarities throughout the text. For example the setting. Both stories do a great job of displayingRead MoreThe Most Dangerous Game By Richard Connell1003 Words   |  5 Pagesuneventful; many people need suspense and drama to feel motivated and engaged in things; this is the same for books. In the book, â€Å"The Most Dangerous Game†, by Richard Connell, the author used various literature methods to create suspense; the techniques he includes are used differently depending on which part of the plot they are used in.  Ã‚  Ã‚   In the story, Richard Connell uses imagery words to create a setting for the story. In turn, the setting gives readers an idea in regards to what is to happen laterRead MoreThe Most Dangerous Game by Richard Connell692 Words   |  3 Pagespsychotic man. This psychopath is a fellow hunter, but desires to poach even greater and smarter game with extremely high intelligence, and is the smartest animal of all -- humans. Throughout the story, the author creates a suspenseful mood through several conflicts the main character encounters, while struggling to survive the â€Å"most dangerous game.† In Richard Connell’s short adventure story, â€Å"The Most Dangerous Game,† Rainsford, a hunter, travels to South America on a hunting expedition, when he carelesslyRead MoreThe Most Dangerous Game By Richard Connell1008 Words   |  5 PagesWhenever you hear the word evil or immoral, what pops up into your head? The character General Zaroff from a story called â€Å"The M ost Dangerous Game† written by Richard Connell pops up into my head. General Zaroff is a man who lives on an island called Ship-Trap Island. Zaroff proves his immorally so many ways in the story. He lures sailors onto this island by using a bright light to trap them into a fake cannel, kidnaps the sailors, and then hunts them. Zaroff is an evil person who kills humansRead MoreThe Most Dangerous Game By Richard Connell828 Words   |  4 Pagesâ€Å"The Most Dangerous Game,† written by Richard Connell in 1924, was made into a movie in 1932. While transitioning the story to a movie, changes were made to the plot. The three changes from the short story to the film version of â€Å"The Most Dangerous Game† include the setup, the characters, and the game. These changes were made to make it possible to be filmed and to amuse the audiences. In the story, it starts off with Rainsford on a yacht with his friend Whitney. They are headed to Ship-Trap IslandRead MoreThe Most Dangerous Game By Richard Connell1318 Words   |  6 Pagesmethod Richard Connell uses to create suspense in â€Å"The Most Dangerous Game† is slowing down the exposition with the purpose of dragging it out and creating a pace that keeps the reader waiting in a prolonged state of suspense. For example, on page 9, Rainsford stumbles upon the chateau after washing up on Ship-Trap island where he is greeted by its owner, saying â€Å"‘It is a very great pleasure to welcome Mr. Sanger Rainsford, the celebrated hunter, to my home...I am General Zaroff.’† Connell is usingRead MoreThe Most Dangerous Game By Richard Connell857 Words   |  4 Pages Richard Connell, the author of â€Å"The Most Dangerous Game,† used the setting in different functions through perseverance in his short story. One of the most critical elements of plot used in this story was suspense. In â€Å"The Most Dangerous Game,† the setting was used to create this, especially through water and foreshadowing. At the very beginning of the story, Whitney, Rainsford’s hunting partner, tells him that the nearby island was called â€Å"Ship-Trap Island.† This foreshadowing leads to a moreRead MoreThe Most Dangerous Game By Richard Connell852 Words   |  4 PagesRichard Connell’s 1924 short story titled â€Å"The Most Dangerous Game† is widely considered a masterfully dark work of short fiction, one that pulls the reader into surreal and chilling circumstances. Through his narrative, Connell provokes both intellect and emotion as he asks questions at the very core of human existence, questions concerning morality and ethics as understood by the modern individual. What is the value of human life? Does power justify action? With his macabre tone, Connell takesRead Mor eThe Most Dangerous Game By Richard Connell1360 Words   |  6 PagesYen Nguyen Mr. Crockwell English Acc 1p: Period 1 24 September 2017 The Most Dangerous Essay Underestimation and cruel actions lead to many things. In â€Å"The Most Dangerous Game,† author Richard Connell reveals a conflict between the main characters, General Zaroff and Rainsford. Rainsford was to play the most dangerous game created by Zaroff, because the only way to survive, is to win it, otherwise death is the only other option. As demonstrated through the use of personification, symbolism, and