Jim Jarmusch’s Unique Western Film, Deadman :: Movie Film Essays

Jim Jarmusch’s Unique Western Film, Deadman In Jim Jarmusch’s Dead Man, he pays homage to the classic style of western films while taking his own eccentric take that puts the film in a league of its own. With a combination of elements related to the western genre and a genre Jarmusch creates all on his own, the viewer can begin to explore and appreciate the unique film, Dead Man. Although the scenery of isolated towns, mystic rivers, and endless forests is consistent with the western genre, the philosophical tone of the movie is not. The philosophy of a true western film deals a character fighting with guns to maintain honor (and of course order and justice). He kills because he has to and that is the end of it. In Dead Man, William Blake appears to be doing the same thing. He begins to use his gun for survival, but it is different. The gun actually stands for something in the film. Blake becomes a poet by the use of his gun, which mirrors the legendary American poet whose name he shares. The guns show how disgusting it is in American society to kill and Jarmusch doesn’t glamorize it in the way that Hollywood blockbusters about violence do. Further exploring the similarities on the surface, a true western always has the same type of characters and props. Blake is shown in the same outfit throughout the film much like the one outfit that a westerner wears. Blake encounters a whore in the town who is not opposed to the usage of guns, which also goes along with a whore’s values in a true western film. The town of Machine is desolate, dirty, and ruled by guns. In western movies there is always a dirty town with the same characteristics. All of those similarities are not used in the same way, however; they are used as tools to give this surface western a deeper meaning that no true western film ever explored. The themes are pessimistic as they deal with death and afterlife, rather than hope and rebirth. The killings in the movie mock the way people are killed in westerns. Blake doesn’t kill to protect his honor; he kills to survive and in turn mocks the system. Another thing that Jarmusch is mocking by using the western genre as a medium is the treatment of Native Americans. Nobody talks about how he was rejected by whites, and then rejected by his own people by growing up in the white society.

A Comparison of the Merits of using Software or Hardware Transactional Memory, against Traditional ‘Semaphore’ Locking

1. IntroductionTransactional memory is poised to take parallel programming a step higher by making it more efficient and much easier to achieve, compared to traditional ‘semaphore’ locking. This is because transactional memory is easier to handle when tasks are divided into several free threads, especially when these threads do not have common access to data. This implies that each section can operate on a processor core and that there is no connection between cores. It can be challenging when different task sections are not totally free – that is, several threads are forced to upgrade a singly shared value. The traditional approach to this utilizes locks and every time that a thread changes a shared value, it requires a lock. In this case, it is not possible for any other thread to receive the lock if another thread possesses it. Instead, the thread must wait until the thread that has the lock can change the shared value. This is likely to require a complex comp utation, and to take an extended amount of time before eventually releasing the lock (Bright, 2011). The release of the lock allows the waiting thread to continue. While this is an effective system, it faces several major challenges. A key issues concerns updates to the shared value that occurs occasionally; therefore, making it rare for a thread to wait at ‘no time’ – the state in which the lock based system can be efficient (Alexandrescu, 2004). Nonetheless, this efficiency commonly disappears every time updates to the shared value are made. Threads take too much time waiting for a lock to appear and are unable to provide any use when in this state.2.Lock vs. Lock Free Data StructuresWhile it may seem easy to handle a singly shared value, locks are difficult to use correctly and this is a challenge faced in real programs. For instance, a program with dual locks 1 and 2 is likely to encounter a problem called a ‘deadlock’. A deadlock is a case wher eby two threads require two locks and only have the option of acquiring lock 1 then 2, or 2 followed by 1. As long as each thread needs the lock in the same order this will not present any issues; however, if one thread needs lock 1 and the other requires lock 2 at the same time, this can cause a deadlock. In this situation, the first thread waits for lock 2 to become free and the second waits for 1 to be free. This exchange makes it difficult for both to succeed and results in a deadlock. This issue might appear to be preventable and only likely to occur when a program has dual locks; however, it can become a challenge to ensure each section performs the right function when this becomes more complex.3. Transactional MemoryIt can argued that transactional memory can solve the problem of lock conflicts. In this case of a deadlock, the programmers could mark the sections of their programs which change the shared data, so that each of the marked blocks is implemented within a transact ion. This means that either the whole block executes, or none of it does. The program can therefore identify the shared value without locking it. This allows for the program to conduct all the necessary operations and write back the value, eventually committing the transaction (Bright, 2011). The key transaction occurs with the commit operation in which transactional memory system ascertains that shared data has been changed after the commencement of an operation. If this is not identified then the commit updates, allowing the thread to go ahead with its function. In case the shared value has not been modified, the transaction stops and the function of the thread is rolled back (Detlefs et al., 2001). In this instance, the program retries the operation. It can be seen, therefore, transactional memory has several merits over traditional semaphore locking. For example, transactional memory is optimistic; this infers that the threads are positioned to succeed and do not look forward to acquiring a lock. This is in case the other thread makes an attempt to conduct a concurrent operation (Detlefs et al., 2001). In an instance of concurrent modifications occurs when a single thread is forced to retry its function. In addition to this, there are no deadlocks in transactional memory. Transactional memory is a programming approach that programmers are familiar with; the transaction and rollback process is not new to those who have handled relational databases because they offer a similar set of features. Nonetheless, blocks facilitate the ease of developing large programs that are correct (Alexandrescu, 2004). Blocks with nested atomic blocks will perform the correct function, although this is not true in the case of lock-based data structur es.4.Merits of the HardwareThere has been little attention given towards hardware compared to software-based implementations. It has also been noted that most real processors seldom support transactional memory and, therefore, modifications are necessary (Maged, 2004). However, there are systems that use virtual machines to undertake their primary function and in this regard there are changes for the .NET and Java virtual machines (Bright, 2011). In other cases, systems use native codes that require certain special operations to allow access to the shared data. This enables the transactional memory software to ascertain that the right operations have occurred in the background. Such implementations have the advantages of ensuring that the programs that are produced are bug-free (Detlefs et al., 2001). The data in cache contains a version tag whereas the cache itself can maintain many versions of the same data. The software sends a signal to the processor to commence a transaction and performs the necessary action. This then signals the processor to commit the work. If other threads have changed the data, resulting in many versions, the cache will refuse the transaction and the software will be forced to try again. Should other versions not be created, then the data is committed (Bright, 2011). This facility is also applicable for speculative execution. A thread can commence execution with data available, whereas speculatively conducting important work – instead of waiting for upgraded versions of all data needed – might mean waiting for additional cores to complete computation (Alexandrescu, 2004). If the data was upgraded, then the work that is committed provides a performance boost; the work had been completed before the delivery of the final value. Should the data turn out to be stale, then the speculative work is rejected and re-deployed with the correct value (Bright, 2011).5.Logical FunctionsA significant advantage that transactional memory has over traditional lock-based programs is that it support is an extension of a load-link or store conditional. Load-link is an undeveloped operation that can be implemented to build many types of thread-safe constructs (Maged, 2004). This comprises both mechanisms that are known, such as locks, and unconventional data structures, such as lists that can be changed by many threads at the same time without locking at all (Alexandrescu, 2004). The creation of software transactional memory is possible through the use of load-link or store conditional. Load-link or store conditional contains two sections: firstly, it utilizes load link to recover the value from memory where it can then conduct the functions it needs to perform on that value. When there is a need to write a new value to the memory, this utilizes store conditional (Detlefs et al., 2001). Store conditional can only succeed if the memory value has not been changed after the load link. In case the value has been changed, the program has to return to the beginning and start again. These systems are restrictive because they do not follow writes to each memory bytes, but to the whole cache lines. This highlights the fact that store conditional has the potential to fail without modification of monitored value (Bright, 2011). Bright (2011) explains that store conditional is also most likely to fail if a context switch happens between the load link and store conditional. Transactional memory is a version of an enforced link load and store conditional; each thread can perform load link on several different memory locations (Maged, 2004). In addition to this, the commit operation does store conditional. This impacts on multiple locations at the same time, with each store either succeeding or failing (Bright, 2011).6.ConclusionIn conclusion, a lock-free procedure is sure to sustain the progress of a thread executing a procedure. While some threads can be put on hold arbitrarily, one thread is certain to progress each move. The whole system can then make progress despite the fact that some threads might take longer than others. It can be seen, therefore, that the use of software or hardware transactional memory presents better ways of ensuring consistency of stored data when accessed and manipulated by several concurrent threads than traditional ‘semaphore’ locking. Consequently, lock-based programs fail to provide any of the above mentioned guarantees7.ReferencesAlexandrescu, A. (2004) Lock-Free Data Structures. Available at: http://www.drdob bs.com/lock-free-data-structures/184401865 [Accessed 12th March 2014]. Bright, P. (2011) IBM’s new transactional memory: make-or-break time for multithreaded revolution. Available at: http://arstechnica.com/gadgets/2011/08/ibms-new-transactional-memory-make-or-break-time-for-multithreaded-revolution/ [Accessed 12th March 2014]. Detlefs, D., Martin, P.A., Moir, M. & Steele, G.L., (2001) ‘The Twentieth Annual ACM Symposium on Principles of Distributed Computing’, in Lock-free Reference Counting, ACM Press: New York. Maged, M.M. (2004) ‘Proceedings of the ACM SIGPLAN 2004 Conference on Programming Language Design and Implementation’, in Scalable Lock-free Dynamic Memory Allocation, ACM Press: New York.

Beer’s Law Problem Set Essay

Beer’s Law Problem Set Spring 2013 1. Calculate the absorbances corresponding to the following values of the percentage of transmitted light: (Provide your final answer with three decimal places) a. 95% b. 88% c. 71% d. 50% e. 17.5% f. 1% 2. A solution of a compound (1.0mM) was placed in a spectrophotometer cuvette of light path 1.05cm. The light transmission was 18.4% at 470nm. Determine the molar extinction coefficient. Include units in your answer. 3. The molar extinction coefficient of reduced NADH (nicotinamide adenine dinucleotide phosphophate) at 340nm is 6220 L/mole ·cm. 3ml of solution containing 0.2 micromoles of NADH were placed in a cuvette of 1.05cm light path. Calculate the percentage light transmission of this sample at 340nm. 4. 3ml of a solution containing both the oxidized and reduced form of nicotinamide adenine dinucleotide (NAD and NADH, respectively) was placed in a 1.0cm spectrophotometer cuvette. The absorbance at 340nm (at which only the reduced form is measured) was 0.207. The absorbance at 260nm (which measures both the oxidized and reduced forms together) was 0.900. The molar extinction coefficient of NADH is 6220 L/mole ·cm, and the molar extinction coefficient at 260nm is 18,000 L/mole ·cm. Calculate the molar concentrations of oxidized and reduced forms of the nucleotide in the mixed solution. 5. A mixture of ortho, meta, and para cresoles dissolved in cyclohexane may be analyzed spectrophotometrically because each exhibits an absorption in a region where absorption due to the other cresols is negligible. The absorption maxima occur at 752nm, 776nm, and 815nm for ortho, meta, and para cresols, respectively. To test the validity of Beer’s Law for solutions of cresols, each is made up in cyclohexane at a series of concentrations and the absorbances measured. Data obtained are recorded below: Ortho Meta Para Concentration (g/100ml) 0.25 0.50 1 2 Absorbance (at 752nm) 0.120 0.235 0.465 0.820 Concentration (g/100ml) 0.60 1.15 2.35 Absorbance (at 776nm) 0.115 0.220 0.460 Concentration (g/100ml) 0.50 1 2.1 3.15 Absorbance (at 815nm) 0.09 0.2 0.415 0.60 An unknown mixture of the three cresols in cyclohexane was analyzed and the percentage of light absorbed at 752, 776, and 815nm was 27.5, 50, and 41 respectively. Determine the concentration of each cresol and the percentage of the final mixture. (Calculate your answer using 3 decimal places) (Hint: if 20% of the light is absorbed by the sample, then 80% is transmitted. Percent absorbed does not equal Absorbance. Also, the table of data above should be used to generate a graph. How would this help you?) Answers: 1) a. 0.022 b. 0.056 c. 0.149 d. 0.301 2) ~700 L/mole ·cm 3) 36.7% 4) NAD= 16.7uM , NADH= 33.3uM 5) ortho 0.259g/100ml 8.697% meta 1.549g/100ml 52.014% para 1.170g/100ml 39.288% e. 0.757 f. 2.00

Charles Hamilton Houston and Brown vs. Board essays

Charles Hamilton Houston and Brown vs. Board essays Charles Hamilton Houston and Brown vs. Board 1945-1970, a time for many, that marked the period known as the Civil Rights Movement. In reality, the Civil Rights Movement spanned from the time the first African American touched American soil as a slave. From that moment on, African Americans begin the struggle for equality and equal protection under the law, a struggle for the rights that are expressly granted to every citizen of the United States under the Constitution. The purpose of the movement was to rid the country of segregation and Jim Crow Laws, to offer African Americans an equal education as that of their Caucasian peers, and as stated before- grant African Americans the civil liberties that the forefathers of our country granted all Americans. The struggle was not easy, nor was it short, nor is it over. When one thinks of the Civil Rights Movement, Rev. Martin Luther King Jr. usually comes to mind. He is the most notable, but he is not the only man that made it his lifes mission to better the opportunities presented to African Americans. From The Montgomery Bus Boycott to the March on Washington, from sit-ins to non-violent protests, the road to equality was paved with blood sweat and tears of some of the most courageous men and women, both black and white, that have graced this earth. There were many who went unnoticed, but without their contributions many of the historical events and land marked cases would have taken longer to come about, if they came into existence at all. Among the many overlooked, is Charles Hamilton Houston. Houston paved the way for the landmark case Brown vs. Board of Education of Topeka, Kansas. Without his great legal mind and strategy equal education would have been a long time in the making. Charles Hamilton Houston was born on September 3, 1895. The same year that the separate but equal doctrine came into existence after the ruling in the Plessy vs. Ferguson case w...

The middle east and conflict there in. essays

The middle east and conflict there in. essays The Jews, one of the most frequently persecuted and discriminated against groups in the world, have possessed a strong desire to return to their Holy Land and create a homogenous state there since the first century. The movement to return to the Holy Land, Zionism, was described in Hebrew religious texts and praised as a puritanical pilgrimage. However, executing the repatriation proved a much more difficult task than the holy books professed it to be. The Muslim inhabitants of the region, the vast majority of whom were opposed to a Jewish state and certainly against leaving their homeland, adversely regarded Zionism. In the struggle to establish a Zionist state, the Arabs were eventually forced to leave their country, beginning a cycle of conflict that characterized Palestine as a state since the beginning of the Zionist movement. The Palestinian Arabs, who felt their very existence was threatened by the Zionist movement, waged official and unofficial wars against the Zionists as a means of liberation. After fleeing Palestine in the first century, the Jewish people sought a return to the Holy Land for centuries to come due to the strong religious significance of the location. However, until the 19th century, Zionism was a small, unorganized movement lacking leadership. In Russia, Jews were threatened by intense religious persecution in the form of pogroms. While many Jews sought refuge in the United States, Zionism also gained popularity as a result. Led by Theodor Herzl, the Zionist movement gained significant amounts of followers during the last four years of the 19th century and continued to grow in the 20th century. The Zionist movement gained even more popularity when, in 1917, the British announced the Balfour Declaration, a document declaring that the British favored establishment of a Jewish state within Palestine. After gaining control of Palestine a month later, the British decided that negotiations between ...

Conversion Factor Definition and Examples

Conversion Factor Definition and Examples A conversion factor is the number or formula you need to convert a measurement in one set of units to the same measurement in another set of units. The number is usually given as a numerical ratio or fraction that can be used as a multiplication factor. For example, say you have a length that is measured in feet and you wish to report on it in meters. If you know that there are 3.048 feet in a meter, then you can use that as a conversion factor to determine what the same distance is in meters.   One foot is 12 inches long, and the conversion factor of 1 foot to inches is 12. In yards, 1 foot is equal to 1/3 yard (conversion factor of 1 foot to yards is 1/3) so forth. The same length is 0.3048 meters, and it is also 30.48 centimeters. To convert 10 feet to inches, multiply 10 times 12 (the conversion factor) 120 inchesTo convert 10 feet to yards, multiply 10 x 1/3 3.3333 yards (or 3 1/3 yards)To convert 10 feet to meters, multiply 10 x .3048 3.048 metersTo convert 10 feet to centimeters, multiply 10 x 30.48 304.8 centimeters Examples of Conversion Factors There many different types of measurements that sometimes require conversions: length (linear), area (two dimensional) and volume (three dimensional) are the most common, but you can also use conversion factors to convert mass, speed, density, and force. Conversion factors are used for conversions within the imperial system (feet, pounds, gallons), within the International System of Units (SI, and the modern form of the metric system: meters, kilograms, liters) or across the two.   Remember, the two values must represent the same quantity as each other. For example, its possible to convert between two units of mass (e.g., grams to pounds), but you generally cant convert between units of mass and volume (e.g., grams to gallons). Examples of conversion factors include: 1 gallon 3.78541 liters (volume)  1 pound 16 ounces (mass)  1 kilogram 1,000 grams (mass)  1 pound 453.592 grams (mass)1 minute 60000 milliseconds (time)  1 square mile 2.58999 square kilometers (area)   Using a Conversion Factor For example, to change a time measurement from hours to days, use a conversion factor of 1 day 24 hours. time in days time in hours x (1 day/24 hours) The (1 day/24 hours) is the conversion factor. Note that following the equal sign, the units for hours cancel out, leaving only the unit for days.

Why Literatura by Mario Vargas - Summury Essay Example | Topics and Well Written Essays - 500 words

Why Literatura by Mario Vargas - Summury - Essay Example e computer, can replace the books and provide the readers with all the excitement, pleasure and the inherent relationship that he develops with the concerned author as well as with the characters. According to the author, while speaking at the Royal Spanish Academy, Bill Gates had even said that his ultimate goal ‘is to put an end to paper and then to books’. Is it really that easy? Llosa says that even though the technology has restructured the priority areas of human race, the relevance and importance of literature can never lose its basic essence of providing people with the opportunity of creative imagination and at the same time, help them to understand the wider scope of human psychology through the experiences of other people. The very appeal of the literature lies on the fact that it not only provides the reader with an opportunity to grow and learn but it also goes beyond the concept of time and space. One can even go so far as to say that one can actually observe the changes or evolution because we have gleaned the process of evolving times through the literature. Indeed, Homer, Socrates, Tolstoy, Shakespeare are as important a figure today as any other contemporary writers. We understand them because we can identify ourselves in their writing. Another very important aspect of literature is that it provides the human race with the means to express their deepest feeling that facilitates platform for the future generations to learn and expand on the various facet of inter-related imagery or the real life situations that directly or indirectly may have considerable impact on other people. The books can inflame the emotions of the readers and they can also be the greatest source of inspiration for those who wish to look beyond the petty selfness of racism, prejudices and religious bigotry. The author is saddened by the fact that the reading habit in people has declined drastically, though women readers have increased. According to a survey in US in