HTML and Javascript Tutorial

HTML and Javascript Tutorial HTML Basic Document Document name goes here Visible text goes here Heading Elements Largest Heading . . . . . . . . . . . . Smallest Heading Text Elements This is a paragraph (line break) (horizontal rule) This text is preformatted Logical Styles This text is emphasized This text is strong This is some computer code Physical Styles This text is bold This text is italic Links, Anchors, and Image Elements This is a Link Send e-mail A named anchor: Useful Tips Section Jump to the Useful Tips Section Unordered list First item Next item Ordered list First item Next item Definition list First term Definition Next term Definition Tables someheader someheader sometext sometext Frames Forms Apples Bananas Cherries Entities < is the same as > is the same as > is the same as  © Other Elements Text quoted from some source. Address 1 Address 2 City Commonly Used Character Entities Note Entity names are case sensitive! The Meta Element As we explained in the previous chapter, the head element contains general information (meta-information) about a document. HTML also includes a meta element that goes inside the head element. The purpose of the meta element is to provide meta-information about the document. Most often the meta element is used to provide information that is relevant to browsers or search engines like describing the content of your document. Keywords for Search Engines Some search engines on the WWW will use the name and content attributes of the meta tag to index your pages. The intention of the name and content attributes is to describe the content of a page. However, since too many webmasters have used meta tags for spamming, like repeating keywords to give pages a higher ranking, some search engines have stopped using them entirely. Uniform Resource Locators Something called a Uniform Resource Locator (URL) is used to address a document (or other data) on the World Wide Web. A full Web address like this: http://www.w3schools.com/html/lastpage.htm follows these syntax rules: scheme://host.domain:port/path/filename The scheme is defining the type of Internet service. The most common type is http. The domain is defining the Internet domain name like w3schools.com. The host is defining the domain host. If omitted, the default host for http is www. The :port is defining the port number at the host. The port number is normally omitted. The default port number for http is 80. The path is defining a path (a sub directory) at the server. If the path is omitted, the resource (the document) must be located at the root directory of the Web site. The filename is defining the name of a document. The default filename might be default.asp, or index.html or something else depending on the settings of the Web server. URL Schemes Some examples of the most common schemes can be found below: Accessing a Newsgroup The following HTML code: HTML Newsgroup creates a link to a newsgroup like this HTML Newsgroup Downloading with FTP The following HTML code: Download WinZip creates a link to download a file like this: Download WinZip. (The link doesnt work. Dont try it. It is just an example. W3Schools doesnt really have an ftp directory.) Link to your Mail system The following HTML code: [emailprotected] creates a link to your own mail system like this: Insert a Script into HTML Page A script in HTML is defined with the tag. Note that you will have to use the type attribute to specify the scripting language. How to Handle Older Browsers A browser that does not recognize the tag at all, will display the tag's content as text on the page. To prevent the browser from doing this, you should hide the script in comment tags. An old browser (that does not recognize the tag) will ignore the comment and it will not write the tag's content on the page, while a new browser will understand that the script should be executed, even if it is surrounded by comment tags. Example New to HTML 4.0 is the ability to let HTML events trigger actions in the browser, like starting a JavaScript when a user clicks on an HTML element. Below is a list of attributes that can be inserted into HTML tags to define event actions. Window Events Only valid in body and frameset elements. Only valid in form elements. Keyboard Events Not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param, script, style, and title elements. Mouse Events Not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param, script, style, title elements. Your Windows PC as a Web Server If you want other people to view your pages, you must publish them. To publish your work, you must save your pages on a web server. Your own PC can act as a web server if you install IIS or PWS. IIS or PWS turns your computer into a web server. Microsoft IIS and PWS are free web server components. IIS - Internet Information Server IIS is for Windows system like Windows 2000, XP, and Vista. It is also available for Windows NT. IIS is easy to install and ideal for developing and testing web applications. IIS includes Active Server Pages (ASP), a server-side scripting standard that can be used to create dynamic and interactive web applications. PWS - Personal Web Server PWS is for older Windows system like Windows 95, 98, and NT. PWS is easy to install and can be used for developing and testing web applications including ASP. We don't recommend running PWS for anything else than training. It is outdated and have security issues. Windows Web Server Versions Windows Vista Professional comes with IIS 6. Windows Vista Home Edition does not support PWS or IIS. Windows XP Professional comes with IIS 5. Windows XP Home Edition does not support IIS or PWS. Windows 2000 Professional comes with IIS 4. Windows NT Professional comes with IIS 3 and also supports IIS 4. Windows NT Workstation supports PWS and IIS 3. Windows ME does not support PWS or IIS. Windows 98 comes with PWS. Windows 95 supports PWS. HTML Summary This tutorial has taught you how to use HTML to create your own web site. HTML is the universal markup language for the Web. HTML lets you format text, add graphics, create links, input forms, frames and tables, etc., and save it all in a text file that any browser can read and display. The key to HTML is the tags, which indicates what content is coming up. XHTML XHTML reformulates HTML 4.01 in XML. CSS CSS is used to control the style and layout of multiple Web pages all at once. With CSS, all formatting can be removed from the HTML document and stored in a separate file. CSS gives you total control of the layout, without messing up the document content. JavaScript Tutorial What is JavaScript? JavaScript was designed to add interactivity to HTML pages JavaScript is a scripting language A scripting language is a lightweight programming language JavaScript is usually embedded directly into HTML pages JavaScript is an interpreted language (means that scripts execute without preliminary compilation) Everyone can use JavaScript without purchasing a license What can a JavaScript Do? JavaScript gives HTML designers a programming tool - HTML authors are normally not programmers, but JavaScript is a scripting language with a very simple syntax! Almost anyone can put small "snippets" of code into their HTML pages JavaScript can put dynamic text into an HTML page - A JavaScript statement like this: document.write(" " + name + " ") can write a variable text into an HTML page JavaScript can react to events - A JavaScript can be set to execute when something happens, like when a page has finished loading or when a user clicks on an HTML element JavaScript can read and write HTML elements - A JavaScript can read and change the content of an HTML element JavaScript can be used to validate data - A JavaScript can be used to validate form data before it is submitted to a server. This saves the server from extra processing JavaScript can be used to detect the visitor's browser - A JavaScript can be used to detect the visitor's browser, and - depending on the browser - load another page specifically designed for that browser JavaScript can be used to create cookies - A JavaScript can be used to store and retrieve information on the visitor's computer How to Put a JavaScript Into an HTML Page Where to Put the JavaScript JavaScripts in a page will be executed immediately while the page loads into the browser. This is not always what we want. Sometimes we want to execute a script when a page loads, other times when a user triggers an event. Scripts in the head section: Scripts to be executed when they are called, or when an event is triggered, go in the head section. When you place a script in the head section, you will ensure that the script is loaded before anyone uses it. Scripts in the body section: Scripts to be executed when the page loads go in the body section. When you place a script in the body section it generates the content of the page. Scripts in both the body and the head section: You can place an unlimited number of scripts in your document, so you can have scripts in both the body and the head section. Using an External JavaScript Sometimes you might want to run the same JavaScript on several pages, without having to write the same script on every page. To simplify this, you can write a JavaScript in an external file. Save the external JavaScript file with a .js file extension. Note: The external script cannot contain the tag! To use the external script, point to the .js file in the "src" attribute of the tag: JavaScript is Case Sensitive Unlike HTML, JavaScript is case sensitive - therefore watch your capitalization closely when you write JavaScript statements, create or call variables, objects and functions. JavaScript Statements A JavaScript statement is a command to the browser. The purpose of the command is to tell the browser what to do. This JavaScript statement tells the browser to write "Hello Dolly" to the web page: It is normal to add a semicolon at the end of each executable statement. Most people think this is a good programming practice, and most often you will see this in JavaScript examples on the web. The semicolon is optional (according to the JavaScript standard), and the browser is supposed to interpret the end of the line as the end of the statement. Because of this you will often see examples without the semicolon at the end. Note: Using semicolons makes it possible to write multiple statements on one line. JavaScript Code JavaScript code (or just JavaScript) is a sequence of JavaScript statements. Each statement is executed by the browser in the sequence they are written. This example will write a header and two paragraphs to a web page: JavaScript Blocks JavaScript statements can be grouped together in blocks. Blocks start with a left curly bracket {, and ends with a right curly bracket }. The purpose of a block is to make the sequence of statements execute together. This example will write a header and two paragraphs to a web page: JavaScript comments can be used to make the code more readable. JavaScript Comments Comments can be added to explain the JavaScript, or to make it more readable. Single line comments start with //. This example uses single line comments to explain the code: Using Comments to Prevent Execution In this example the comment is used to prevent the execution of a single code line: In this example the comments is used to prevent the execution of multiple code lines: Using Comments at the End of a Line In this example the comment is placed at the end of a line: Variables are "containers" for storing information. Declaring (Creating) JavaScript Variables Creating variables in JavaScript is most often referred to as "declaring" variables. You can declare JavaScript variables with the var statement: After the declaration shown above, the variables are empty (they have no values yet). However, you can also assign values to the variables when you declare them: After the execution of the statements above, the variable x will hold the value 5, and carname will hold the value Volvo. Note: When you assign a text value to a variable, use quotes around the value. Assigning Values to Undeclared JavaScript Variables If you assign values to variables that have not yet been declared, the variables will automatically be declared. These statements: have the same effect as: Redeclaring JavaScript Variables If you redeclare a JavaScript variable, it will not lose its original value. After the execution of the statements above, the variable x will still have the value of 5. The value of x is not reset (or cleared) when you redeclare it. Conditional Statements Very often when you write code, you want to perform different actions for different decisions. You can use conditional statements in your code to do this. In JavaScript we have the following conditional statements: if statement - use this statement if you want to execute some code only if a specified condition is true if...else statement - use this statement if you want to execute some code if the condition is true and another code if the condition is false if...else if....else statement - use this statement if you want to select one of many blocks of code to be executed switch statement - use this statement if you want to select one of many blocks of code to be executed script type="text/javascript"> //If the time is less than 10, //you will get a "Good morning" greeting. //Otherwise you will get a "Good day" greeting. var d = new Date(); var time = d.getHours(); if (time { document.write("Good morning!"); } else { document.write("Good day!"); } The JavaScript Switch Statement You should use the switch statement if you want to select one of many blocks of code to be executed. Syntax //You will receive a different greeting based //on what day it is. Note that Sunday=0, //Monday=1, Tuesday=2, etc. var d=new Date(); theDay=d.getDay(); switch (theDay) { case 5: document.write("Finally Friday"); break; case 6: document.write("Super Saturday"); break; case 0: document.write("Sleepy Sunday"); break; default: document.write("I'm looking forward to this weekend!"); } JavaScript Popup Boxes Alert Box An alert box is often used if you want to make sure information comes through to the user. When an alert box pops up, the user will have to click "OK" to proceed. Syntax: Confirm Box A confirm box is often used if you want the user to verify or accept something. When a confirm box pops up, the user will have to click either "OK" or "Cancel" to proceed. If the user clicks "OK", the box returns true. If the user clicks "Cancel", the box returns false. Syntax: Prompt Box A prompt box is often used if you want the user to input a value before entering a page. When a prompt box pops up, the user will have to click either "OK" or "Cancel" to proceed after entering an input value. If the user clicks "OK" the box returns the input value. If the user clicks "Cancel" the box returns null. Syntax: JavaScript Functions JavaScript Functions To keep the browser from executing a script when the page loads, you can put your script into a function. A function contains code that will be executed by an event or by a call to that function. You may call a function from anywhere within the page (or even from other pages if the function is embedded in an external .js file). Functions can be defined both in the and in the section of a document. However, to assure that the function is read/loaded by the browser before it is called, it could be wise to put it in the section. How to Define a Function The syntax for creating a function is:

Corporate Charities The Right and Wrong Ways for Big Business to Give B

Corporate Charities The Right and Wrong Ways for Big Business to Give Back to the Community Introduction Why do people who have money feel inclined to give it away? Throughout history, reasons for philanthropy have ranged from guilt to concern for personal image, from religious principles to simple generosity. America is awash with corporate CEO’s who have so much money that they could never spend it in a lifetime. What is pocket change to them could save thousands of lives in a third-world country. And yet only some of them choose to give their money away. Even then some of the ones who do are not charitable out of the goodness of their heart but do it purely to make themselves look better in the eyes of the public. In this paper I seek to demonstrate a spectrum of corporate charities. Through four case studies – namely, Wal-Mart, Cisco Systems, Bill and Melinda Gates, and Ted Turner – I show what four companies/company founders have done in the realm on philanthropy and attempt to distinguish between those that do what they do only to hike up their public i mage between those whose intentions are wholeheartedly altruistic. The low end of the spectrum – Wal-Mart Wal-Mart is the largest employer in the United States, as well as the largest importer and purchaser of manufactured goods, and largest groceries outlet. The discount store was founded in 1962 by Sam Walton in a small town in Arkansas. Walton hoped that he could construct a chain of his stores in small communities throughout Arkansas and the surrounding states and by the 80’s this is just what he did. By 1990, Wal-Mart had become one of the largest competitors with Kmart and Target and had opened over 1400 stores in 28 different states. To... ...f/about_us/case_series/a07990014.pdf 3. http://www.fact-index.com/w/wa/wal_mart.html 4. http://www.tribuneindia.com/2003/20030511/biz.htm 5. http://worldhealthnews.harvard.edu/ 6. http://www.tribuneindia.com/2003/20030924/world.htm 7. http://www.walmartfoundation.org 8. http://www.cnn.com/US/9709/18/turner.gift/ 9. http://www.tedturner.com/philanthropies.html 10. http://newsroom.cisco.com/dlls/2004/hd_052504f.html 11. http://www.cisco.com/gov/markets/e_government.html 12. www.cnnfn.com/2003/08/05/ markets/markets_newyork/ 13. http://www.thehollandsentinel.net/stories/080303/bus_080303083.shtml 14. http://www.positivenation.co.uk/issue90/regulars/worldnews/wnews90.htm 15. http://www.usatoday.com/money/media/2001-11-29-ted-turner.htm 16. http://www.ufcw.org/issues_and_actions/walmart_workers_campaign_info/index.cfm Corporate Charities The Right and Wrong Ways for Big Business to Give B Corporate Charities The Right and Wrong Ways for Big Business to Give Back to the Community Introduction Why do people who have money feel inclined to give it away? Throughout history, reasons for philanthropy have ranged from guilt to concern for personal image, from religious principles to simple generosity. America is awash with corporate CEO’s who have so much money that they could never spend it in a lifetime. What is pocket change to them could save thousands of lives in a third-world country. And yet only some of them choose to give their money away. Even then some of the ones who do are not charitable out of the goodness of their heart but do it purely to make themselves look better in the eyes of the public. In this paper I seek to demonstrate a spectrum of corporate charities. Through four case studies – namely, Wal-Mart, Cisco Systems, Bill and Melinda Gates, and Ted Turner – I show what four companies/company founders have done in the realm on philanthropy and attempt to distinguish between those that do what they do only to hike up their public i mage between those whose intentions are wholeheartedly altruistic. The low end of the spectrum – Wal-Mart Wal-Mart is the largest employer in the United States, as well as the largest importer and purchaser of manufactured goods, and largest groceries outlet. The discount store was founded in 1962 by Sam Walton in a small town in Arkansas. Walton hoped that he could construct a chain of his stores in small communities throughout Arkansas and the surrounding states and by the 80’s this is just what he did. By 1990, Wal-Mart had become one of the largest competitors with Kmart and Target and had opened over 1400 stores in 28 different states. To... ...f/about_us/case_series/a07990014.pdf 3. http://www.fact-index.com/w/wa/wal_mart.html 4. http://www.tribuneindia.com/2003/20030511/biz.htm 5. http://worldhealthnews.harvard.edu/ 6. http://www.tribuneindia.com/2003/20030924/world.htm 7. http://www.walmartfoundation.org 8. http://www.cnn.com/US/9709/18/turner.gift/ 9. http://www.tedturner.com/philanthropies.html 10. http://newsroom.cisco.com/dlls/2004/hd_052504f.html 11. http://www.cisco.com/gov/markets/e_government.html 12. www.cnnfn.com/2003/08/05/ markets/markets_newyork/ 13. http://www.thehollandsentinel.net/stories/080303/bus_080303083.shtml 14. http://www.positivenation.co.uk/issue90/regulars/worldnews/wnews90.htm 15. http://www.usatoday.com/money/media/2001-11-29-ted-turner.htm 16. http://www.ufcw.org/issues_and_actions/walmart_workers_campaign_info/index.cfm

Communication and Information p3 Essay

There are many different methods of communication. These can be divided into two different categories: Electronic (non-written), and Non-Electronic (written). Methods of communication that would come under Written Communication would be things like:   Letter   Memos   Reports   Fax   Invoices   Flow charts Publicity materials SMS (Text Message) Methods of communications that would come under Electronic Communication would be things along the lines of: Telephone   Video conferencing. Meetings Both Written Communication and Electronic Communication have their advantages. These advantages differ depending on the audience which is being addressed. The recipient is very important when it comes to the type of communication that is being used. Within The Organisation Within the organisation the methods of communication that I would use would be things like:   Memos – To help the staff members who are higher up on the food chain remember certain tasks that have set upon them. Reports – To view any progress or falls being happening within the organisation. Reports are a good way to do this as they are detailed.   Meetings – In an organisation, it is inevitable that there will be meetings held. These are usually used to discuss improvement, the current status of the organisation, and to get staff to contribute their ideas. Customers These are the methods of communication that I would use to communicate with the customers:   Publicity Materials – To tell the truth, this is an obvious one really. The way to get customers is through publicity. If your organisation is a well known one, it is more likely to prosper.   Advertisements – In my opinion, advertisements should be used by all major and even small organisations. These should outline things like services provided and special offers to attract more customers. Suppliers Here are some of the methods of communications I would use to communicate with suppliers of goods etc. :   Letters – These are a great way of communicating and people have been using them for centuries. I would use letters to communicate with suppliers because it is not a long time consuming method of communicating. You just write what you need to say, put it in an envelope, post it, and the recipient gets it the next day.   Telephone – This is one of the simplest, most direct ways of communicating with people today. Talking with suppliers on the telephone would mean that all of the business involving matters like deliveries, times, amounts, and other things can all be sorted out in a matter of minutes.

The Case of Martha Stewart On Improper Actions

The Case of Martha Stewart On Improper Actions Introduction One of the most intriguing cases, the one of the famous Martha Stewart, offers quite a lot of food for thoughts. With help of the mystery that has been created about the case, the popularity of the celebrity has increased immensely. However, it cannot be denied that Martha suffered greatly, trying to prove her innocence – unfortunately, in vain.Advertising We will write a custom essay sample on The Case of Martha Stewart: On Improper Actions specifically for you for only $16.05 $11/page Learn More Although the guilt of the celebrity has already been proven, it must be admitted that the case, quite complicated and entangled, requires certain clarifications. It seems that there are certain issues that might bring the entire case into conflict and prove that the fault of the convicted was far not that great as the court has emphasized. One of the women known for her TV shows with her recipes for a comfortable life in a cozy house, the supers tar of our times is now considered guilty of selling the Erbitux medicine, which resulted in ImClone Systems company suffering certain losses in their trade. Quite a precedent to be discussed in the court, this story could have led to rather sad consequences for the film star. However, as it has turned out, it was not the very issue of selling the medicine in the improper way that turned Martha into the accused – but the improper behavior! This is quite a reason to feel concerned, it seems. On the one hand, there is no doubt that the high standards for the behavior of the world celebrities must be somewhat coordinated, and some standards must be set, yet the accusations themselves seem ridiculous. The Struggle Begins: the Sufferings of the Celebrity Despite all the emotions concerning the social status of the accused and her attempts to plead not guilty, there is no doubt that the woman is to be charged for the negligence of laws. No matter how hard this might result in her c areer, the case was supposed to be carried on until it had resulted in either conviction or the exoneration. Such are the postulates of the law – it must be kept in mind that all people are equal when it comes to facing the justice, and the social status does not matter in this case. Thus, it is absolutely clear that Martha Stewart, â€Å"charged only with lying after the fact about the stock sale† (Turrow 64), should have received the penalty, which she actually did. Therefore, the sentence passed by the jury can be considered well-grounded and completely just. However, certain details must be kept in mind. On the one hand, Martha’s guilt has been proved, which leaves no place for doubts. Yet the way in which the woman was treated makes one doubt if the basis for the conviction was just enough. Logically, Stewart should have been penalized for the unjust behavior and for selling the medicine that she had no right to. Yet at present all the details of the case p oint at the fact that the attitude towards the accused was shaped because of the way she treated Douglas Faneuil.Advertising Looking for essay on common law? Let's see if we can help you! Get your first paper with 15% OFF Learn More Into the Details: The Charges According to the official charge, the woman was accused of selling the shares of the ImClone Systems company, which led to its considerable drop of rates. Therefore, the celebrity was accused of the unfair manipulations and charged. However, that was the official version of what had happened. According to the comments that the public made after the judgment was passed, the decisions of the jury were based on the celebrity’s behavior – the woman treated Douglas Faneuil in rather rude way and behaved in the manner that was considered as an â€Å"inappropriate† for a woman. Therefore, it can be considered that the sentence passed was based mainly on the personal impressions of the ju ry. That Is Unfair, or On Personal Opinions Based on the testimonies of Larry Stewart, the court decision seems rather unfair. Although the official sentence was based completely on the facts and the actual pieces of evidence, the following question can be raised: once the celebrity behaved in a â€Å"proper†, â€Å"female† way, would the decision of the jury the same? â€Å"Are we punishing Martha Stewart for refusing to fulfill expectations?†, Lisa Nuss (4) asks. It is quite doubtful that, once Martha displayed the emotions that one is â€Å"supposed† to in the given situation, and behaved in the most composed and modest way, the sentence passed by the court would have been the same. It is necessary to emphasize that the decision of the court seems to be based on personal opinion rather than on the evidence that was displayed. Conclusion Therefore, it must be considered that the case of Martha Stewart is much more complicated than it used to seem. Unles s the case had been so emotionally rich and filled with personal likes and antipathies, it would have been able to find out whether Martha had been convicted justly or not. Yet with the controversy of the present situation, it is impossible to claim for sure whether the sentence passed to Martha was well-grounded. Thus, it seems that the appellation could be used in this case. Only reconsidering the details of the case, one can pass the right verdict, with impartial judge and the jury that would not base their convictions on the gossips and the prejudices concerning women’s behavior.

Canadian Senate essays

Canadian Senate essays The Canadian Electorate: Good, Better, Best There is a tendancy to believe that ones own electoral system is the best way of choosing a government. For this reason and the fact that Canada possesses an overall efficient and fair system, there is usually not too much controversy among the general public about the way political officials are elected to office. The fact of the matter is that the issues surrounding the First Past the Post (or Single Member Plurality) system are serious enough to be considering a better alternative. Canada would, in fact, be better served with a different electoral system. The party system suits Canadians well, due to its cultural, regional, linguistic and other diversities. However, it is the brand of party system that is incorporated which is slowing down the electoral system. To better understand where the current system (FPTP) could be improved, a discussion of some major flaws will be addressed followed by the offering of the Proportional Representation as the best alternative. The first-past-the-post system encourages strategic voting which can be very compromising. Citizens are encouraged to vote for one of the two options most likely to win, even if it is not their most preferred option. An example of this type of voting could be easily recognized in the 2004 Canadian federal election; where many people were believed to have only voted for Liberal or Conservative, respectively, because one of these two forerunners was the lesser of two evils. New Democratic Party leader, Jack Layton, expressed his concern immediately following the election that many potential NDP voters chose the Liberal alternative, only because of their distaste for the Conservatives. The reason why this type of voting comes to be is because the first-past-the-post system designates one clear-cut winner. Citizens become fearful that they will cast a wasted vote&ap...

Critical Analysis Paper Essay Example | Topics and Well Written Essays - 1250 words - 1

Critical Analysis Paper - Essay Example Along the kerbs and spaces in between the lines are trees and at some points are there are some overhead street lighting lamps in the parkway. On the rear of the painting of the parkway is a bridge below which the lanes of the parkway pass. Again, on the rear of the painting, the sky looks lighted, implying some source of natural lighting cast on the sky. In a similar way, hind sections of the parkway including the bridge and the surrounding sections are brighter as a result of the lighting. In contrast, the foreground of the parkway painting is not lit and creates an impression of some shadow. On the far rear of the painting, in the corner is equally lit storey building amidst several leafy trees. It is also noticeable that the trees around the storey structure are leafier as compared to the ones in between the lanes which look rather unhealthy. The painting of the Masholu Parkway also shoes a highway that is not up to standard since some sections of it look dilapidated. Proper planning of the highway also seems not to be sufficient no visible highway marks and directions to the highway users. Te lighting posts are also scanty in the painting of the Masholu Parkway. The textural surface of the painting and especially with relation to the tactile character of the highway is in agreement. The quality feel and coloration of the painting most resembles the fabric of what the highways are perceived and known to be. The grey color used in most parts of the painting correlates well with the usual nature and texture and the feeling of any road or highway. As to the areas in the foreground, middle ground and the background and the space around and within the objects of the painting, the highway itself is accorded sufficient space. The space occupied by the highway itself is much greater than any other object in the painting. In fact, the bridge and the highway lanes take up more than three-quarters of the space available. This, in effect enhances the main focus of

Renewable Energy Essay Example | Topics and Well Written Essays - 1500 words

Renewable Energy - Essay Example In terms of expense, it is expensive to set up a wind farm. Furthermore, wind is unpredictable as it changes with weather and in other places; wind power cannot support a wind farm because it is too weak. Wind strength is also variable with time. Therefore, wind mills do not give out uniform amount of energy at all times. Sometimes, not even the slightest amount of power becomes generated (Kaltschmitt, Streicher & Wiese 96). If everybody is to turn to wind as an energy source, large tracts of wind farms would become needed to supply sufficient electricity. For instance, the most immense wind mill available in the United States is only able to supply electricity to about 400 homes. Solar energy is another renewable source of energy that people have failed to embrace fully. Solar energy has been in use since ancient times, with several technologies getting harnessed to collect heat and light from the sun with two main systems been used in this modern age (Boyle 89). These are photovolt aic, also known as solar cell and concentrated solar power systems. Concentrated solar systems have lenses which concentrate a significant area of light into a beam. The concentrated heat becomes used as a heat source. The photovoltaic cell, on the other hand, converts light into electric current. Solar energy gets applied in several fields, for instance industries located in remote places, use solar energy to power monitoring devices as well as corrosion protection devices (Johansson 66). Residents living in such areas use it to pump water, to cook, through the use of solar cookers, to heat and purify water and to dry fruits and herbs. Tests are underway on the use of solar powered planes. Recently, solar trash became designed in some of the big cities. Solar... Renewable Energy This essay demonstrates the comparison of different renewable energy sources types, their advantages, and disadvantages suitability, sustainability, and profitability if they are used during a long period of time. It talks about the possibility of fossil fuels replacement by new types of energy sources. Various researches are being carried out all over the world by scientists to come up with cost-effective, and environmentally friendly sources of energy. One of the analyzed sources is solar energy that people have failed to embrace fully. Solar energy is cost effective, easy to install, present almost everywhere, silent and do not pollute the environment to large extends. However, the initial cost to install solar cells is high, making it costlier to other traditional sources such as coal. It can also be limited by weather conditions, especially when clouds cover almost the whole sky all day. Another example of renewable energy is hydropower. This energy is generated from flowing water. It is the most affordable source of energy across the world. It is also readily available and pollution due to hydroelectric energy is minimal. It is, however, expensive to build and construct large dams. Furthermore, the giant dams have become associated with serious geological damage. Though, due to various shortcomings of these sources of energy, the non-renewable sources continue to be widely used. Therefore, the two sources become required to complement each other, but complete dependence on either of them is unwise.