Wednesday, August 26, 2020

COMPARE AND OR CONTRAST THE EFFECTS OF THE SETTING ON THE MAIN Essay

Think about AND OR CONTRAST THE EFFECTS OF THE SETTING ON THE MAIN CHARACTERS OF THE FOLLOWING TWO SHORT STORIES. THE LAST LEAF, BY WILLIAM SIDNEY PORTER (O. HEN - Essay Example To represent the different manners by which setting can be utilized to recognize and form the characters of a story, we will thoroughly analyze the impacts of setting on the fundamental characters engaged with William Sidney Porter’s â€Å"The Last Leaf† (O. Henry) and Nadine Gordimer’s â€Å"The Ultimate Safari.† In â€Å"The Last Leaf,† the story opens with a portrayal of the â€Å"crazy and broken† lanes that â€Å"make weird points and curves.† Immediately the peruser is set at the top of the priority list of either a separated piece of town or an artist’s mecca, which surely this neighborhood has become as we learn in the extremely next section. As the territory becomes related with specialists in the reader’s mind, a thought of the way of life of the zone turns out to be clear. With this relationship to the place where there is creative mind, inventiveness and pretend, the peruser is progressively disposed to trust one of the fundamental characters, Johnsy, would genuinely kick the bucket once the last leaf tumbled from the ivy vines outside her window. This conviction is, somewhat, additionally shared by her flat mate Sudie and their ground floor neighbor, Mr. Behrman. Understanding that Sudie’s dread in regards to the vine is sufficiently able to make reference to her anxiety to their neighbor shows this conviction of her roommate’s is at any rate mostly convincing to the character. This is additionally underlined as Sudie and Mr. Behrman â€Å"peered out the window dreadfully at the ivy vine. At that point they took a gander at one another for a second without speaking.† Mr. Behrman’s last perfect work of art is additionally a sign of exactly the amount he gets tied up with the idea of a craftsman who may kick the bucket basically dependent on her feelings. To differentiate against this culture, this confidence in the intensity of the vine to number out the time Johnsy has left to live, isn't shared by the great specialist, who isn't a piece of the craftsman culture and can't comprehend a lady who might live so as to some time or another paint the narrows of Naples yet not for the desire for a decent man. Be that as it may, he is a decent specialist who

Saturday, August 22, 2020

Concurrent Processes In Operating Systems

Simultaneous Processes In Operating Systems The programming procedure, to utilize hinders to reenact the simultaneous execution of a few projects on Atlas PCs was known as multiprogramming. It was spearheaded by Tom Kilburn and David Howarth. Multiprogramming in early days was finished utilizing get together level language. Scarcest slip-up in projects could make program capricious henceforth testing them was troublesome likewise the get together level language had no reasonable establishment. Working frameworks structured utilizing this multiprogramming strategies became extremely enormous and flighty their originators talked about programming emergency. This made a pressing innovative work requirement for simultaneous programming strategies. PC researchers ventured out understanding the issues identified with simultaneous programming during mid 1960s, they found essential ideas, communicated them by programming documentation, remembered them for programming dialects and utilized these dialects to compose the model working frameworks. These equivalent ideas were then applied to any type of equal figuring. Presentation of Concurrent procedures in working frameworks Procedures assumed a key job in molding early working frameworks. They were for the most part run in a carefully consecutive request. Multiprogramming existed yet the procedures didn't actually run simultaneously rather a period based instrument was utilized in which a constrained measure of time was given to each procedure. Indeed, even in those days the processors speed was quick enough to give and dream that the various procedures were running simultaneously. They were called as timesharing or multiprogramming working frameworks (November 1961, called CTSS Compatible Time-Sharing System likewise Multics the ancestors of UNIX created by MIT) These sort working frameworks were extremely well known and were viewed as a forward leap during those occasions. The significant disadvantage was intricacy of the framework structure which made it hard to make it increasingly adaptable and adaptable with the goal that a solitary universally handy OS could be fabricated. Additionally the asset sharing done by these procedures was crude or wasteful and it just appeared there was a great deal of space for innovative work. Work on these working frameworks cleared a path for simultaneous procedures. A large portion of the first ideas identified with simultaneousness were created during this period. These imaginative thoughts and ideas went on become the essential standards on which todays working frameworks and simultaneous applications are structured. (A significant venture attempted by IBM toward this path was in 1964 the OS/360 for their new centralized servers framework 360) To construct dependable simultaneous procedures understanding and creating fundamental ideas for simultaneousness was significant let us talk about simultaneousness and a portion of its essential programming ideas. Simultaneousness In software engineering, simultaneousness is a property of frameworks where a few calculations are executing all the while, and conceivably cooperating with one another. [Wikipedia] Let us consider a genuine model a lodging venture, for example, the structure of a house will require some work to go on in corresponding with different works. On a fundamental level, an undertaking like structure a house doesn't require any simultaneous movement, yet an alluring component of such a venture is, that the entire assignment can be finished in shorter time by permitting different sub errands to be completed simultaneously. There is no explanation any painter can't paint the house from outside (assuming the rainclouds hold back!), while the plasterer is occupied in the upstairs rooms and the joiner is fitting the kitchen units ground floor. There are anyway a few limitations on simultaneousness which is conceivable. The block layer will typically need to hold up until the establishment of the house had been layered before he could start the errand of building the dividers. The different undertakings associated with such a venture can for the most part be viewed as free of each other, however the booking of the assignments is compelled by thoughts of an errand An unquestionable requirement be finished before task B can start A subsequent model is that of a railroad organize. Various trains making ventures inside a railroad arrange, and by diverge from the past model, when they start and they end is commonly free of the vast majority of different excursions. Where the excursions connect however is at places where courses cross or utilize regular segments of track for parts of excursions. We can in this model see the development of trains as projects in execution, and the segments of track as the assets which these projects could possibly need to impart to different projects. Consequently the two trains run simultaneously on the off chance that their courses communicate having similar assets without intruding on one another like simultaneous procedures in working frameworks. So as talked about before we comprehend that procedures are essential to actualize simultaneousness so let us examine the procedure as an idea which will acquaint us with the most significant idea for simultaneousness for example strings! Principal ideas Procedure A procedure is a running project; OS monitors running projects in type of procedures and their information. A procedure is made of various strings. Strings The need to compose simultaneous applications presented strings. At the end of the day, strings are forms that share a solitary location space. Each string has its own program counter and stack. Strings are frequently called lightweight procedures as N strings have 1 page table, 1 location space and 1 PID while N forms have N page tables, N address spaces and N PIDs. Along these lines, an arrangement of executing guidelines is known as a string that runs autonomously of different strings but can impart information to different strings straightforwardly. A string is contained inside a procedure. There can exist various strings inside a procedure that share assets like memory, while various procedures don't share these assets. A straightforward string model There are two classes characterized in this model to be specific SimpleThread which is a subclass of the Thread class and TwoThreads class. class SimpleThread expands Thread { open SimpleThread(String str) { super(str); } open void run() { for (int I = 0; I { System.out.println(i + getName()); Attempt { sleep((int)(Math.random() * 1000)); } get (InterruptedException e) {} } System.out.println(DONE! + getName()); } } The strategy SimpleThread() is a constructor which sets the Threads name utilized later in the program. The activity happens in the run() technique which contains a for circle that emphasizes multiple times that shows the emphasis number and the name of the Thread, at that point dozes for an irregular interim of as long as a second. The TwoThreads class gives a principle() technique that makes two SimpleThread strings named London and NewYork. class TwoThreads { open static void principle (String[] args) { new SimpleThread(London).start(); new SimpleThread(NewYork).start(); } } The principle() technique likewise begins each string promptly following its development by calling the beginning() strategy. Following ideas are generally utilized at the string level and furthermore the issues examined are experienced while executing simultaneousness. Race condition A race condition happens when different procedures get to and control similar information simultaneously, and the result of the execution relies upon the specific request wherein the entrance takes place.[http://www.topbits.com/race-condition.html] It isn't so natural to distinguish race condition during program execution on the off chance that it is seen that the estimation of shared factors is flighty, it might be caused due to race condition. In simultaneous programming there are more than one legitimate conceivable string executions thus request of string execution can't be anticipated. Race condition may deliver unsure outcomes. Result of race condition may happen after quite a while. So as to forestall unusual outcomes due to race condition, following strategies are utilized Common rejection Shared rejection (frequently condensed to mutex) calculations are utilized in simultaneous programming to maintain a strategic distance from the synchronous utilization of a typical asset, for example, a worldwide variable, by bits of PC code called basic segments. (Wikipedia) - Critical Region (CR) A piece of code that is constantly executed under common prohibition is known as a basic district. Because of this, the compiler rather than the developer should watch that the asset is nor being utilized nor alluded to outside its basic districts. While programming, basic area lives when semaphores are utilized. CRs are required just if the information is writeable. It comprises of two sections: Factors: These must be gotten to under shared avoidance. New dialect articulation: It distinguishes a basic area that approaches factors. There are two procedures in particular An and B that contain basic locales for example the code where shared information is decipherable and writable. - Semaphores Semaphores are components which secure basic areas and can be utilized to execute condition synchronization. Semaphore typifies the common variable and utilizing semaphore, just permitted set of activities can be completed. It can suspend or wake forms. The two activities performed utilizing semaphores are pause and sign, otherwise called P and V individually. At the point when a procedure performs P activity it advises semaphore that it needs to utilize the common asset, if the semaphore is free the procedure accesses the mutual variable and semaphore is decremented by one else the procedure is deferred. On the off chance that V activity is performed, at that point the procedure advises the semaphore that it has completed the process of utilizing shared variable and semaphore esteem is augmented by one. By utilizing semaphores, we endeavor to maintain a strategic distance from other multi-programming issue of Starvation. There are two sorts of Semaphores: Paired semaphores: Control access to a solitary asset, taking the estimation of 0 (asset is being used) or 1 (asset is accessible). Tallying semaphores: Control access to different assets, along these lines expecting a scope of nonnegative qualities. - Locks The most widely recognized approach to

Monday, August 17, 2020

The Day My Dad Didnt Make it Home from Work - by Marianne Worley, Business Writing Consultant at The Essay Expert

The Day My Dad Didnt Make it Home from Work - by Marianne Worley, Business Writing Consultant at The Essay Expert [Reposted with the permission of the very talented business/marketing writer Marianne Worley, consultant at The Essay Expert. This poignant story was originally posted on her blog, Marketing Matters and Other Stories. I didnt even have to think before asking her if I could post it to The Essay Experts blog on Memorial Day.] The day was Monday, April 21, 2008. My phone rang just after 9pm. I checked the caller IDâ€"it was my brother Nolan. Instinctively, I knew something was wrong, very wrong. My Dad had been in an accident and was being taken to a hospital about 20 miles north of my house. We didn’t know anything more. I quickly got dressed, jumped in my car, and hit the gas pedal. About 5 minutes later, my brother called again. Now Dad was being transported by helicopter to the much larger hospital just a few miles from my house. I got off the freeway and drove back the other way. My brother, sister-in-law, and I arrived at the hospital around the same time. The helicopter was still in flight, so we staked out seats in the busy emergency room to wait, still perplexed about what had happened to our Dad. After my stepmom and sister rushed in, we learned the whole story. My Dad usually came home from work around 5 or 6, so when it started to get dark and he still wasn’t home, my stepmom picked up the phone to make some increasingly frantic calls. My Dad was notorious for sporadically answering cell calls. As a contractor, he was constantly breaking and losing mobile phones. She wasn’t surprised when he didn’t answer, so she dialed his friends and clients. He had left the job site hours earlier, but no one knew where he was. My stepmom and sister decided to drive to the job site to look for him. They found his empty work truck on the side of the road with the driver’s side door open. They called 911 and nearby friends who could help with the search. There was a small creek parallel to the road with a steep bank covered in thick, muddy vegetation. My athletic sister charged down the hill and found him lying unconscious in the creek, pale and covered with dirt. The paramedics pulled him up on a rescue stretcher and loaded him into the helicopter. This process doesn’t take a few minutes, like it does on TV and in the movies. The rescue actually took more than an hour. The helicopter finally arrived, but still we knew nothing about his condition. We assumed it was a stroke, or something similar. When they finally let us in to see him, we discovered that he had suffered some sort of episode, possibly a seizure, and was experiencing pronounced weakness on one side of his body. It looked like a stroke, but he was stable. So they admitted him and scheduled an MRI for the next morning. The following day, the doctors confirmed that the MRI results showed that it looked like a stroke. We felt relieved. We knew a brain tumor would be a much more deadly diagnosis. But they still wanted to get a new MRI, with contrast, the next day to be sure. On Wednesday, April 23, 2008, our lives changed forever. The new MRI showed that it wasn’t a strokeâ€"it was a brain tumor. They called in a neurosurgeon for a consultation. My education in neurology commenced that day. I carried a notebook at all times. I scribbled down details from the doctors during the day and did online research at night. Over the next 7 months, my Dad had a biopsy and was diagnosed with glioblastoma multiforme, the most aggressive form of brain cancer. Our doctor decided to treat with radiation and chemotherapy, not surgery. I knew that without surgery, the 6-month survival rate was almost zero. When I pressed him, he said he could do the surgery if we got a second opinion from one of the neurosurgeons he recommended. After many phone calls, I got an appointment with one of the top experts in the country at Cedars-Sinai in Los Angeles. The neurosurgeon just needed to see my Dad’s (now enormous) medical file, along with all of his MRI results. We got his opinion, and my Dad had surgery to remove the tumor. Although the surgery was successful, he still needed radiation and chemo to stave off regrowth, which is incredibly common. I researched clinical trials and spoke to doctors at UCLA and UC San Francisco. My Dad didn’t qualify for any trials and his prognosis was grave. By September, the tumor was back, bigger than before. We tried some experimental chemo drugs, but nothing helped. My Dad wasted away before our eyes, until we finally called in hospice care in November. On December 3rd, the hospice nurse told us that the end was near, so we gathered together to say goodbye. We stayed up pretty late, but finally succumbed to our own fatigue and reluctantly went to bed. Just before 4:30am, I awoke suddenly and sat bolt upright. I went downstairs and the nurse told me she had just checked on my Dadâ€"he was still hanging in there. When I went to his bedside, I touched his hands and face. I didn’t think he was breathing, so I woke up my stepmom, who had decided to take a quick nap just minutes before. He was gone. We all gathered around his bed and cried again. A week or so later, my sister Whitney and I, always the Daddy’s-Little-Girl types, decided to get tattoos to celebrate our Dad’s life. She got an elegant “W” and I got an infinity sign with a “W” in the middle. Worley forever. My Dad was never called to battle in Vietnam, but that doesn’t mean he didn’t fight a war. So on this Memorial Day, I remember all who have fallen in war, including the continuing war on cancer. ____________________ I haven’t met anyone who hasn’t been touched in some way by cancer. The next time you’re thinking about making a cash donation to a charity, please consider one of the organizations in the fight against cancer, including the American Brain Tumor Association. Thanks for reading this very personal story. I’m sharing it because it shaped who I am today. Many thanks to my fellow blogger The JackBâ€"his post from yesterday inspired me to write this. I haven’t met anyone who hasn’t been touched in some way by cancer. The next time you’re thinking about making a cash donation to a charity, please consider one of the organizations in the fight against cancer, including the American Brain Tumor Association.