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A camera is a device used to capture images, either as still photographs or as sequences of moving images (movies or videos). The term comes from the Latin camera obscura for "dark chamber" for an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.
APERTURE
In optics, an aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.
f-stop
In optics, the f-number (sometimes called focal ratio, f-ratio, or relative aperture[1]) of an optical system expresses the diameter of the entrance pupil in terms of the effective focal length of the lens; in simpler terms, the f-number is the focal length divided by the aperture diameter. It is a dimensionless number that is a quantitative measure of lens speed.
Depth of field increases with f-number.This means that photos taken with a low f-number will tend to have one subject in focus, with the rest of the image out of focus.
1> Resolution.
2> Zoom (more the optical zoom better is the camera , optical preferred over digital zoom).
3> Image quality i.e High pixel size.
4> Red-Eye-Reduction-Flash.
5> High ISO support (50,100,.......3200).
6> Aperture speed setting (for low light fast lens is required).
7> USB 2 support.
8> Built in microphone.
9> Weather protection.
10> D-lighting.
11> large LCD screen.
12> Lens shift vibration reduction.
13> Size.
Wonder | Location | Image |
---|---|---|
Chichen Itza | ![]() | ![]() |
Christ the Redeemer | ![]() | |
Colosseum | ![]() | ![]() |
Great Wall of China | ![]() | ![]() |
Machu Picchu | ![]() | |
Petra | ![]() | |
Taj Mahal | ![]() | ![]() |
And one listing has honorary status:Great Pyramid of Giza (The last remaining ancient wonder of the world) | ![]() |
The other 13 finalists,listed alphabetically, were:
WONDER LOCATION
A Web search engine is a search engine designed to search for information on the World Wide Web. Information may consist of web pages, images and other types of files.
Some search engines also mine data available in newsgroups, databases, or open directories. Unlike Web directories, which are maintained by human editors, search engines operate algorithmically or are a mixture of algorithmic and human input.
Timeline | ||||
---|---|---|---|---|
Note: "Launch" refers only to web availability of original crawl-based web search engine results. | ||||
Year | Engine | Event | ||
1993 | Aliweb | Launch | ||
1994 | WebCrawler | Launch | ||
Infoseek | Launch | |||
Lycos | Launch | |||
1995 | AltaVista | Launch (part of DEC) | ||
Excite | Launch | |||
SAPO | Launch | |||
1996 | Dogpile | Launch | ||
Inktomi | Founded | |||
HotBot | Founded | |||
Ask Jeeves | Founded | |||
1997 | Northern Light | Launch | ||
1998 | Launch | |||
1999 | AlltheWeb | Launch | ||
Naver | Launch | |||
Teoma | Founded | |||
Vivisimo | Founded | |||
2000 | Baidu | Founded | ||
2003 | Info.com | Launch | ||
2004 | Yahoo! Search | Final launch | ||
A9.com | Launch | |||
2005 | MSN Search | Final launch | ||
Ask.com | Launch | |||
GoodSearch | Launch | |||
2006 | wikiseek | Founded | ||
Quaero | Founded | |||
Ask.com | Launch | |||
Live Search | Launch | |||
ChaCha | Beta Launch | |||
Guruji.com | Beta Launch | |||
2007 | itah.com | Launched | ||
wikiseek | Launched | |||
AskWiki | Launched |
As of late 2007, Google was by far the most popular Web search engine worldwide.A number of country-specific search engine companies have become prominent; for example Baidu is the most popular search engine in the People's Republic of China.
Most popular search engines worldwide, Dec. 2007 | ||
---|---|---|
Company | Millions of searches | Relative market share |
28,454 | 46.47% | |
Yahoo! | 10,505 | 17.16% |
Baidu | 8,428 | 13.76% |
Microsoft | 7,880 | 12.87% |
NHN | 2,882 | 4.71% |
eBay | 2,428 | 3.9% |
Time Warner (includes AOL) | 1,062 | 1.6% |
Ask.com and related | 728 | 1.1% |
Yandex | 566 | 0.9% |
Alibaba.com | 531 | 0.8% |
Total | 61,221 | 100.0% |
HOW SEARCH ENGINE WORKS
A search engine operates, in the following order
Web search engines work by storing information about many web pages, which they retrieve from the WWW itself. These pages are retrieved by a Web crawler (sometimes also known as a spider) — an automated Web browser which follows every link it sees. Exclusions can be made by the use of robots.txt. The contents of each page are then analyzed to determine how it should be indexed (for example, words are extracted from the titles, headings, or special fields called meta tags). Data about web pages are stored in an index database for use in later queries. Some search engines, such as Google, store all or part of the source page (referred to as a cache) as well as information about the web pages, whereas others, such as AltaVista, store every word of every page they find. This cached page always holds the actual search text since it is the one that was actually indexed, so it can be very useful when the content of the current page has been updated and the search terms are no longer in it. This problem might be considered to be a mild form of linkrot, and Google's handling of it increases usability by satisfying user expectations that the search terms will be on the returned webpage. This satisfies the principle of least astonishment since the user normally expects the search terms to be on the returned pages. Increased search relevance makes these cached pages very useful, even beyond the fact that they may contain data that may no longer be available elsewhere.
When a user enters a query into a search engine (typically by using key words), the engine examines its index and provides a listing of best-matching web pages according to its criteria, usually with a short summary containing the document's title and sometimes parts of the text. Most search engines support the use of the boolean operators AND, OR and NOT to further specify the search query. Some search engines provide an advanced feature called proximity search which allows users to define the distance between keywords.
The usefulness of a search engine depends on the relevance of the result set it gives back. While there may be millions of webpages that include a particular word or phrase, some pages may be more relevant, popular, or authoritative than others. Most search engines employ methods to rank the results to provide the "best" results first. How a search engine decides which pages are the best matches, and what order the results should be shown in, varies widely from one engine to another. The methods also change over time as Internet usage changes and new techniques evolve.
Most Web search engines are commercial ventures supported by advertising revenue and, as a result, some employ the controversial practice of allowing advertisers to pay money to have their listings ranked higher in search results. Those search engines which do not accept money for their search engine results make money by running search related ads alongside the regular search engine results. The search engines make money every time someone clicks on one of these ads.
The vast majority of search engines are run by private companies using proprietary algorithms and closed databases, though some are open source.The net asset value, or NAV, is the current market value of a fund's holdings, less the fund's liabilities, usually expressed as a per-share amount. For most funds, the NAV is determined daily, after the close of trading on some specified financial exchange, but some funds update their NAV multiple times during the trading day. The public offering price, or POP, is the NAV plus a sales charge. Open-end funds sell shares at the POP and redeem shares at the NAV, and so process orders only after the NAV is determined. Closed-end funds (the shares of which are traded by investors) may trade at a higher or lower price than their NAV; this is known as a premium or discount, respectively. If a fund is divided into multiple classes of shares, each class will typically have its own NAV, reflecting differences in fees and expenses paid by the different classes.
Some mutual funds own securities which are not regularly traded on any formal exchange. These may be shares in very small or bankrupt companies; they may be derivatives; or they may be private investments in unregistered financial instruments (such as stock in a non-public company). In the absence of a public market for these securities, it is the responsibility of the fund manager to form an estimate of their value when computing the NAV. How much of a fund's assets may be invested in such securities is stated in the fund's prospectus.
Turnover is a measure of the fund's securities transactions, usually calculated over a year's time, and usually expressed as a percentage of net asset value.
This value is usually calculated as the value of all transactions (buying, selling) divided by 2 divided by the fund's total holdings; i.e., the fund counts one security sold and another one bought as one "turnover". Thus turnover measures the replacement of holdings.
In Canada, under NI 81-106 (required disclosure for investment funds) turnover ratio is calculated based on the lesser of purchases or sales divided by the average size of the portfolio (including cash).
The term mutual fund is the common name for an open-end investment company. Being open-ended means that, at the end of every day, the fund issues new shares to investors and buys back shares from investors wishing to leave the fund.
Mutual funds may be legally structured as corporations or business trusts but in either instance are classed as open-end investment companies by the SEC.
Other funds have a limited number of shares; these are either closed-end funds or unit investment trusts, neither of which is a mutual fund.
Exchange-traded funds are also valuable for foreign investors who are often able to buy and sell securities traded on a stock market, but who, for regulatory reasons, are limited in their ability to participate in traditional U.S. mutual funds.
Equity funds, which consist mainly of stock investments, are the most common type of mutual fund. Equity funds hold 50 percent of all amounts invested in mutual funds in the United States. Often equity funds focus investments on particular strategies and certain types of issuers.
Bond fundsBond funds account for 18% of mutual fund assets. Types of bond funds include term funds, which have a fixed set of time (short-, medium-, or long-term) before they mature. Municipal bond funds generally have lower returns, but have tax advantages and lower risk. High-yield bond funds invest in corporate bonds, including high-yield or junk bonds. With the potential for high yield, these bonds also come with greater risk.
Money market funds hold 26% of mutual fund assets in the United States. Money market funds entail the least risk, as well as lower rates of return. Unlike certificates of deposit (CDs), money market shares are liquid and redeemable at any time. The interest rate quoted by money market funds is known as the 7 Day SEC Yield.
Hedge funds in the United States are pooled investment funds with loose SEC regulation and should not be confused with mutual funds. Some hedge fund managers are required to register with SEC as investment advisers under the Investment Advisers Act. The Act does not require an adviser to follow or avoid any particular investment strategies, nor does it require or prohibit specific investments. Hedge funds typically charge a management fee of 1% or more, plus a "performance fee" of 20% of the hedge fund's profits. There may be a "lock-up" period, during which an investor cannot cash in shares. A variation of the hedge strategy is the 130-30 fund for individual investors.
Mutual funds offer several advantages over investing in individual stocks. For example, the transaction costs are divided among all the mutual fund shareholders, who also benefit by having a third party (professional fund managers) apply expertise and dedicate time to manage and research investment options. However, despite the professional management, mutual funds are not immune to risks. They share the same risks associated with the investments made. If the fund invests primarily in stocks, it is usually subject to the same ups and downs and risks as the stock market.
Many mutual funds offer more than one class of shares. For example, you may have seen a fund that offers "Class A" and "Class B" shares. Each class will invest in the same pool (or investment portfolio) of securities and will have the same investment objectives and policies. But each class will have different shareholder services and/or distribution arrangements with different fees and expenses.
A multi-class structure offers investors the ability to select a fee and expense structure that is most appropriate for their investment goals (including the length of time that they expect to remain invested in the fund).
A front-end load or sales charge is a commission paid to a broker by a mutual fund when shares are purchased, taken as a percentage of funds invested. The value of the investment is reduced by the amount of the load. Some funds have a deferred sales charge or back-end load. In this type of fund an investor pays no sales charge when purchasing shares, but will pay a commission out of the proceeds when shares are redeemed depending on how long they are held. Another derivative structure is a level-load fund, in which no sales charge is paid when buying the fund, but a back-end load may be charged if the shares purchased are sold within a year.
Load funds are sold through financial intermediaries such as brokers, financial planners, and other types of registered representatives who charge a commission for their services. Shares of front-end load funds are frequently eligible for breakpoints (i.e., a reduction in the commission paid) based on a number of variables. These include other accounts in the same fund family held by the investor or various family members, or committing to buy more of the fund within a set period of time in return for a lower commission "today".
It is possible to buy many mutual funds without paying a sales charge. These are called no-load funds. In addition to being available from the fund company itself, no-load funds may be sold by some discount brokers for a flat transaction fee or even no fee at all.No-load funds include both index funds and actively managed funds. The largest mutual fund families selling no-load index funds are Vanguard and Fidelity, though there are a number of smaller mutual fund families with no-load funds as well.
Crust:
3 C. graham cracker crumbs (about 25 graham crackers)
2 T. cocoa powder, sifted
2 T. light brown sugar
5 T. unsalted butter, melted
Filling and garnish:
8 oz. semisweet chocolate
3 oz. bittersweet chocolate
2 1/2 C. heavy whipping cream
2 T. milk
2 T. brandy or rum or 1 t. vanilla extract
Cocoa powder
White and semisweet chocolate curves, lattices or chocolate curls
Preheat the oven to 350°F.
In a medium bowl mix together the graham cracker crumbs, cocoa, brown sugar and melted butter. Press the mixture in an even layer on the bottom of a 10-inch springform pan. Bake for 10 minutes. Remove from the oven and carefully remove the side of the pan and put the base, with the crust on it, on a wire rack to cool. When it is cool, reassemble the pan.
To prepare the filling: Melt the semisweet and bittersweet chocolates together in the top of a double boiler over simmering water or a heatproof bowl set over simmering water. When melted, set the chocolate aside to cool to lukewarm. It should still be liquid.
Set the heavy whipping cream in its container in a bowl of hot water until it is cool but no longer refrigerator-cold.
In a mixing bowl, whisk the cream with the milk and brandy or vanilla until it is thick enough to leave a ribbon trail when the whisk is lifted. Be careful not to overwhip the cream.
Blend a heaping spoonful of the cream into the lukewarm chocolate, then quickly fold the chocolate into the remaining cream using large metal spoon. Pour the mixture over the crust in the pan and smooth the top with a narrow spatula.
Cover the pan with plastic wrap. Chill for at least 4 hours, preferably overnight.
Remove the cake from the pan and leave it at room temperature for 30 minutes before serving. Just before serving, sift a fine layer of cocoa powder over the top and garnish with chocolate curves or curls and, if desired, a fanned strawberry.
Makes 12 generous servings.
MAKHMALI PANEER TIKKA
True to its name, this tikka will melt in your mouth, delighting your taste buds!
Preparation Time: 10 minutes. Cooking Time: 10 minutes. Serves 6.
Baking temperature : 200°C (400°F). Baking time : 20 minutes.
3 cups paneer (cottage cheese), cut into 50 mm. (2”) cubes
To be mixed into a marinade
¾ cup thick fresh hung curds (dahi)
¼ cup cheese spread
1 tsp green chilli paste
2 tbsp cashewnut (kaju)powder
½ tsp garam masala
Salt to taste
1.Combine the paneer cubes with the prepared marinade and toss gently till the paste coats the paneer pieces evenly from all sides. Keep aside for 15 minutes.
2.Arrange the paneer pieces on the wire rack in a pre-heated oven at 200°C (400°F) and grill till the paneer is done (approx. 15 minutes).
3.Remove from the oven and serve hot.
BANANA WALNUT MUFFINS
Makes 15 muffins
½ cup refined flour (maida)
¼ cup butter
¼ cup powdered sugar
½ cup mashed banana
¼ tsp vanilla essence
2 tbsp milk
2 tbsp chopped walnuts
2 tbsp quick cooking rolled oats
1 tsp fruit salt
For the topping
1/4 cup Chocolate Chips
1. Sieve the flour. Keep aside.
2. Cream the butter and sugar till smooth and creamy
3. Add the mashed banana, vanilla essence and milk and mix well.
4. Add chopped walnuts, oats and flour and mix well.
5. Add the fruit salt and sprinkle a little water on it. When bubbles form, mix gently.
6. Spoon the mixture into 15 paper cups. Top with chocolate chips
7. Microwave them for 1 minute and 30 seconds.
Serve warm.
MUTTER AUR PHUDINE KI TIKKI
Green peas make great tikkis when combined with potatoes and a handful of mint leaves.
Preparation Time: 5 minutes. Cooking Time: 10 minutes. Makes 8-10 tikkis.
1 cup boiled green peas
½ cup boiled and mashed potatoes
2 tbsp mint leaves (phudina)
Salt to taste
1½ tsp garam masala
2 green chillies, finely chopped
Oil for deep-frying
1.Combine all the ingredients and blend in a mixer to a coarse mixture (Add a little water if required).
2.Divide the mixture into 8 to 10 equal portions and shape each portion into a round tikki.
3.Heat the oil in a kadhai on a medium flame and deep-fry the tikkis till they are golden brown in colour from all sides. Drain on an absorbent paper and serve hot.
RAWA IDLI
Soft and spongy rawa idlis can be made in a jiffy for a quick and satiating breakfast.
Preparation Time: 5 minutes. Cooking Time: 7 to 8 minutes. Makes 12 idlis.
For the batter
1 cup rawa(semolina)
¼ cup curds (dahi)
1 cup water
1 tbsp chopped coriander (dhania)
salt to taste
For the tempering
½ tsp mustard seeds (rai)
½ tsp cumin seeds (jeera)
a pinch asafoetida (hing)
1 tsp urad dal (split black lentils)
1 tbsp broken cashewnuts
4 to 6 curry leaves(kadi patta)
2 green chillies, chopped
1 tsp oil
½ tsp ghee
Other ingredients
¾ tsp fruit salt
oil for greasing
For the batter
1. Combine all ingredients together, other than the fruit salt and leave aside for 10 minutes.
For the tempering
1. Combine the oil, ghee, mustard seeds, cumin seeds, urad dal and asafoetida in a microwave safe bowl and microwave on HIGH for 2 minutes.
2. Add the cashewnuts, curry leaves, green chillies and microwave for 1 more minute.
How to proceed
1. Pour 1 cup of water in the base of a microwave safe idli steamer and microwave on HIGH for 1 minute. Grease the idli moulds using little oil.
2. Add the tempering and the fruit salt to the batter and mix well.
3. Pour 2 tablespoons of batter into each greased cavity of the idli moulds and microwave, covered, on HIGH for 2 minutes.
4. Repeat with the remaining batter to make 8 more idlis.
5. Serve hot with coconut chutney and sambhar.