The System Behind The Scientific Calculator Computer Science Essay

The System Behind The Scientific Calculator Computer Science Essay The first scientific calculator that included all of the basic features above was the programmable  Hewlett-Packard  HP-9100A,[1]  released in 1968, though the  Wang  LOCI-2 and the Mathatronics Mathatron had some features later identified with scientific calculator designs. The HP-9100 series was built entirely from discrete  transistor  logic with no  integrated circuits, and was one of the first uses of the  CORDIC  algorithm for trigonometric computation in a personal computing device, as well as the first calculator based on  reverse Polish notation  entry. HP became closely identified with RPN calculators from then on, and even today some of their high-end calculators (particularly the long-lived  HP-12Cfinancial calculator and the  HP-48  series of graphing calculators) still offer RPN as their default input mode due to having garnered a very large following. The  HP-35, introduced on February 1, 1972, was  Hewlett-Packards first  pocket calculator  and the worlds first handheld scientific calculator.[2]  Like some of HPs desktop calculators it used  reverse Polish notation. Introduced at US$395, the HP-35 was available from 1972 to 1975. HP continues to develop and market high-end scientific calculators, like the  HP-35s  and  HP-49 series, which have been favored by scientists and engineers, in labs, offices, as well as in the field. Texas Instruments, after the introduction of several units with scientific notation, came out with a handheld scientific calculator on January 15, 1974 in the form of the SR-50.[3]  TI continues to be a major player in the calculator market, with their long-running  TI-30  series being one of the most widely used scientific calculators in classrooms. Casio  and  Sharp  have also been major players, with Casios FX series (beginning with the Casio FX-1 in 1972[4]) being a very common brand, used particularly in schools. Casio is also the #3[citation needed]  player in the  graphing calculator  market, and was the first company to produce one (Casio fx-7000G). INTRODUCTION Scientific Calculator Top of Form Bottom of Form The calculator was written by Rolf Howarth in early 1996. A fully featured scientific calculator with proper operator precedence is implemented, including trig functions and logarithms, factorials, 12 levels of parentheses, logs to base 2 (a handy function for information entropists!), bitwise logical operators, hex, octal, binary and ASCII display. The calculator is written in JavaScript and you are welcome to view the JavaScript source (visible within the HTML page) for personal educational purposes as long as you recognize that it is copyrighted and not in the public domain. This calculator is now available as part of Hummingbirds Enterprise Information Portal. All enquiries regarding licensing the calculator should be directed to Hummingbird Ltd. Basic Functions Addition The addition (sum function) is used by clicking on the + button or using the keyboard. The function results in a+b. Subtraction The subtraction (minus function) is used by clicking on the - button or using the keyboard. The function results in a-b. Multiplication The multiplication (times function) is used by clicking on the x button or using the keyboard * key. The function results in a*b. Division The division (divide function) is used by clicking on the / button or using the keyboard / key. The function results in a/b. Sign The sign key (negative key) is used by clicking on the (-) button. The function results in -1*x. Square The square function is used by clicking on the x^2 button or type ^2. The function results in x*x. Square Root The square root function is used by clicking on the x button or type sqrt(). This function represents x^.5 where the result squared is equal to x. Raise to the Power The raise to the power (y raised to the x function) is used by clicking on the y^x button or type ^. Natural Exponential The natural exponential (e raised to the x) is used by clicking on the e^x button or type exp(). The result is e (2.71828) raised to x. Logarithm The logarithm (LOG) is used by clicking on the LOG button or type LOG(). Natural Logarithm The Natural logarithm (LN) is used by clicking on the LN button or type LN(). Inverse Multiplicative inverse (reciprocal function) is used by pressing the 1/x button or typing inv(). This function is the same as x^-1 or dividing 1 by the number. Exponent Numbers with exponents of 10 are displayed with an e, for example 4.5e+100 or 4.5e-100. This function represents 10^x. Numbers are automatically displayed in the format when the number is too large or too small for the display. To enter a number in this format use the exponent key EEX. To do this enter the mantissa (the non exponent part) then press EEX or typee and then enter the exponent. Factorial The Factorial function is used by clicking the ! button or type !. PI PI is a mathematical constant of the ratio of a circles circumference to its diameter. PROPOSED SYSTEM The following documentation is a project the Name of the term paper allotted. It is a detailed summary of all the drawbacks of the old system and how the new proposed system overcomes these shortcomings. The new system takes into account the various factors while designing a new system. It keeps into the account the Economical bandwidth available for the new system. The foremost thing that is taken care of is the Need and Requirements of the User. DESCRIPTION Before developing software we keep following things in mind that we can develop powerful and quality software PROBLEM STATEMENT Problem statement was to design a module: Which is user friendly Which will restrict the user from accessing other users data. Which will help user in viewing his data and privileges. Which will help the administrator to handle all the changes. FUNCTIONS TO BE PROVIDED: The system will be user friendly and completely menu driven so that the users shall have no problem in using all options. The system will be efficient and fast in response. The system will be customized according to needs. (View Add Delete Modify) SYSTEM REQUIRMENTS Operating system: MS Windows XP or Windows Vista Language: C Language Processor: Pentium IV Processor RAM: 512 MB Hard disk: 5 GB SYSTEM DESIGN Then we began with the design phase of the system. System design is a solution, a HOW TO approach to the creation of a new system. It translates system requirements into ways by which they can be made operational. It is a translational from a user oriented document to a document oriented programmers. For that, it provides the understanding and procedural details necessary for the implementation. Here we use Flowchart to supplement the working of the new system. The system thus made should be reliable, durable and above all should have least possible maintenance costs. It should overcome all the drawbacks of the Old existing system and most important of all meet the user requirements. Welcome to main menu of Scientific Calculator Enter Your Choice? On calculator Do your any task Do you want to continue? START Trignometery(sin,cos) Inverse(1/x) STOP Switch off calculator Yes No APPLICATIONS In most countries, students use calculators for schoolwork. There was some initial resistance to the idea out of fear that basic arithmetic skills would suffer. There remains disagreement about the importance of the ability to perform calculations in the head, with some curricula restricting calculator use until a certain level of proficiency has been obtained, while others concentrate more on teaching estimation techniques and problem-solving. Research suggests that inadequate guidance in the use of calculating tools can restrict the kind of mathematical thinking that students engage in. Others have argued that calculator use can even cause core mathematical skills to atrophy, or that such use can prevent understanding of advanced algebraic concepts. There are other concerns for example, that a pupil could use the calculator in the wrong fashion but believe the answer because that was the result given. Teachers try to combat this by encouraging the student to make an estimate of the result manually and ensuring it roughly agrees with the calculated result. Also, it is possible for a child to type in à ¢Ã‹â€ Ã¢â‚¬â„¢1  ÃƒÆ'-  Ãƒ ¢Ã‹â€ Ã¢â‚¬â„¢1 and obtain the correct answer 1 without realizing the principle involved. In this sense, the calculator becomes a crutch rather than a learning tool, and it can slow down students in exam conditions as they check even the most trivial result on a calculator. FUTURE SCOPE OF THE PROJECT Our project will be able to implement in future after making some changes and modifications as we make our project at a very low level. So the modifications that can be done in our project are: To make it screen touch so no need to touch key buttons and one more change which can we made is to add snaps of the person who use it. TESTING Testing is the major control measure used during software development. Its basic function is to detect errors in the software. During requirement analysis and design, the output is a document that is usually textual and no executable. After the coding phase, computer programs are available that can be executed for testing purpose. This implies that testing not only, has to uncover errors introduced during coding, but also errors introduced during previous phase. Thus the goal of testing is to uncover the requirements, design and coding errors in the programs. The Sourcecode declared above for the program of Scientific Calculator has been tested and it has been found that the above source code is okay and correct.The program involves many type of conversions. These conversions has to done carefully

“A Rose For Emily” by Willam Failkner Essay

In the story â€Å"A Rose for Emily† by William Faulkner, the use of foreshadowing is used truly conspicuously. To foreshadow is to provide advanced indications to a future event or discovery.. The extremely strong dank scent about Ms. Emily’s house, the second floor of this residence being locked and the discovery of the iron grey hair, all are strong foreshadowing incidents that achieve this surprising and strong but also believable ending. Faulkner use of foreshadowing is used ingeniously to achieve a shocking and powerful yet certain ending Ms. Emily lived in a white, square, seventies style house that is now rundown, un maintained, rotting and decaying. The inside of the house was said to smell like â€Å"dust and disuse – a close, dank smell.† Yet the scent smelt by 3 different neighbors was stronger than this, the stench was so rotten that it traveled into neighboring homes. As one neighbor complained and described the smell she said â€Å"†¦ they were not surprised when the smell developed. It was another link between the gross, teeming world and the high and mighty Griersons.† Faulkner was trying to develop a scent so strong that it could only be that of a dead body. As Ms. Emily’s husband, Homer Barron had gone unseen ever since they were married, it foreshadows to the discovery of his dead body in the house. The foreshadowing helps to bring certainty and believability to the ending of this story. Ms. Emily was occasionally seen through windows in her home sometimes on the second floor and sometimes on the main floor. As Ms. Emily grew old she started only to be seen on the main floor of her house, not ever on the second. People who would watch the house said â€Å"†¦she had evidently shut up the top floor of the house†¦Ã¢â‚¬  Faulkner wanted to make the reader wonder why the second floor was locked and not used. What could Ms. Emily be trying to hide? This is a development in the foreshadowing of the scent in the house, as this foreshadows the discovery of Homer Barron’s dead body locked away, upstairs in Ms. Emily’s house. Again this foreshadowing strengthens the certainty and believability to the ending of this story. As Ms. Emily grew old, her hair turned gray. Her hair was described as â€Å"pepper-and-salt-iron-gray.† The eventual death of Ms. Emily would end the  mystery of her life that all of the society had once wondered about. After her funeral and her burial, the town’s people broke down the locked upstairs door. Found was the deceased and decaying body of Homer Barron, but more closely on the pillow beside where his body laid, an indentation of a head and some strands of hair. The hair was shockingly described as â€Å"†¦a long strand of iron-gray hair.† All of Faulkner’s foreshadowing lead to this point, where the story came together. This hair foreshadows the untold part of the story, where Ms. Emily had kept Homer Barron’s body after he had died and had been sleeping with the body. This foreshadowing is extremely strong and serious as it is un-realistic in our ‘normal’ society. Through the helpful foreshadowing events that lead to a strong and serious example, one can see how the use of foreshadowing brings about a cunning and serious yet a truthful ending. The use of foreshadowing can have a strong impact on story’s and novel’s it can change predictions, alter thoughts on characters and could leave an impression on the reader. In today’s ‘normal’ society this discovery in the story would mostly be seen as a weariness, but to the ‘macabre’ society this story may have been interpreted differently and would possibly appear normal to them.

Sports Essay Topics Reviews & Tips

Sports Essay Topics Reviews & Tips Key Pieces of Sports Essay Topics Sports play a critical part in modern contemporary society. Sports offer an original change when benefiting the body. It is an integral part of everyday life. It make our body strong and active. Men and women take part in various sports for various factors. Athletes face a tough choice whether to use drugs to boost their performance or maybe to select the danger of suffering from severe side effects. With our pool of writers, you will have plenty of essay topics on sports to pick from. Still, for a number of us, sports may be an escape and it consumes us. Undoubtedly, they have become a major spectator activity. Clearly, professional sports have turned into an important spectator activity. Why the game of basketball is crucial for everybody to play. How playing the game of basketball for a professional can provide you a bright future on an international scale. Sports and games both are extremely important and quick way to better physical and mental fitness. Sports or games that can be played within a room, hall or a more compact area are referred to as Indoor Sports. Sports Essay Topics - Is it a Scam? There's no limit to what it's possible to write about sport, and there are many perspectives that you might be requested to employ. You ought to be quite diligent in your approach so you can find with a very good work. Now, when you pick the incorrect subject, you are going to end up with lots of evaluations which are baffling. In the same way, certain subjects need different procedures of teaching aids and a parent may know only 1 method and might therefore train their child with an outdated tactic that might not reflect the recent trends. When you want any a ssistance about the sports argumentative essay topics, there is just a single stop shop that will provide everything that you demand. There are several powerful topic that you're able to write about in regards to sports. Honestly, it's the most popular portion of my list. It is impossible to produce a true friend online. If you would like to tackle some more elaborate issues which do not discuss advantages of sports but instead concentrate on debated topics instead, think about using one of the subsequent sports topics to write about modern-day troubles. The teachers don't always assign the specific topic. Since you can see there are a great deal of topics that may be related to sports research papers, which means you can pick the direction and make your own paper on a narrowed topic. You may search for assorted family topics to compose your argumentative essay on in the event you find it really hard to deal with some family responsibilities. Athletes argue that the decision needs to be left to them so as to respect their personal option. Some folks may believe that the great content could be written on any topic and the paper success is dependent just on the mastery of the writer. They argue about sports more than anything else, which could be seen as crazy considering all the bigger problems in the world. Another reason for pursuing such sports is that there's a good deal of fame and money involved inside them. When you have selected the topic through our guide, we'll also provide you with article writing samples and templates which will also direct you through the writing. So, whenever you will need thesis statement examples, just know that you're getting one from one who has lots of qualifications in exactly the same field alongside you. Don't be fearful of the old-fashioned interface what distracts other students provides you a distinctive and valuable resource! Typically, the teachers or professors assign the topics by themselves. Life, Death and Sports Essay Topics At a specific point, you will have to compose an essay utilizing satire essay topics. Thanks to the correct selection of presentation style and a thorough understanding of the goals you wish to attain in your essay, there are many categories essay themes may be broken into. You have to remember that sports argumentative essay topics should be critiqued. Below you can come across several quite great topics for essays of different kinds. You may continue to keep your argumentative essays for your upcoming job portfolio in case they're highly graded. If you're looking for assistance with your essay then we provide a comprehensive writing service offered by fully qualified academics in your area of study. To compose a strong argumentative essay, students should start by familiarizing themselves with a number of the common, and frequently conflicting, positions on the research topic so they can write an educated paper. Some students might find it difficult to compose an essay since they have not done it before or since they aren't aware with a particular structure. The Do's and Don'ts of Sports Essay Topics Understanding how to compose a strong argumentative paper will help you advance your very own argumentative thinking. In choosing your topic, it's frequently a good idea to start out with a subject which you already have some familiarity with. Very often it becomes tough to choose one particular topic either on account of the many ideas in the student's head, or due to their complete absence. Naturally, it's the topics you may have a small laugh about!

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