What Does That Line Mean? Architectural drawings contain graphical information explained in more detail in the specifications. Specifications became necessary when buildings got more complex, the entirety of the intended work results could not be captured in drawings without the drawings becoming too cluttered. Tracing lines of inquiry would be a whole new form of drawing and wondering what simple lines mean, more details and the work results would have to be explained in specifications separate from the drawings.
Add your comment People have been using the solar cooker or oven for centuries. The first solar oven was made by a Swiss scientist in Solar cookers may be used to cook food and to heat the drinking water.
The solar cooker concentrates and bends solar radiation with the help of a reflecting surface on the back, top, and bottom sides of a pot. Handling it is easy, but the solar cooker does need its space: There are a variety of types of solar cookers: The basic principles of all solar cookers are: Some device, usually a mirror or some type of reflective metal, is used to concentrate light and heat from the sun into a small cooking area, making the energy more concentrated and therefore more potent.
Converting light to heat: Any black on the inside of a solar cooker, as well as certain materials for pots, will improve the effectiveness of turning light into heat.
Also, the better a pan conducts heat, the faster the oven will work. Isolating the air inside the cooker from the air outside the cooker makes an important difference.
Using a clear solid, like a plastic bag or a glass cover, will allow light to enter, but once the light is absorbed and converted to heat, a plastic bag or glass cover will trap the heat inside.
This makes it possible to reach similar temperatures on cold and windy days as on hot days. Uses plastic sheets to assure that liquids do not seep through into the oven.
Also they prevent staining of the underlying sheet in the oven.
According to the design, solar cookers are of three types: A box cooker is designed with a special wall that shines or reflects sunlight into the box. Heat gets trapped under a piece of glass or plastic covering the top of the cooker. A box oven is effective for slow cooking of large amounts of food.
The food is inside a separate container of plastic or glass that traps heat. Panel cookers can be easily built with very limited amount of supplies and at a very low cost.
Structure of a solar cooker Source: Stardate Online More costly solar cookers have a round parabolic mirror. They are comprised of rounded walls which focuses sunlight directly into the bottom of the oven. Although food cooks quickly in parabolic ovens, they are hard to construct.
With a diameter of cm, corresponding to an output of W, they need about 25 minutes to bring 3 litres of water to a boil; with half that diameter W outputit would take about 40 minutes to boil just 1 litre of water. Using the parabolic mirror is simple, however, one must track the sun by hand.
More expensive versions have a built-in tracking device that automatically follows the sun. Details of a solar cooker Source: Mother Earth News Feasibility of technology and operational necessities top: Despite the popularity of solar cookers and various supportive actions for the development projects, there are still few barriers reported for the successful implementation of this technology around the globe, especially in the developing nations.
Currently, the use of solar ovens is very limited among the rural communities of the developing countries. This is due to their high manufacturing costs and the inappropriateness of current designs for multiple environments.
Many designs utilise material that is not locally available, or require highly skilled labour. These are some of the reasons why the promotion of solar cookers worldwide has traditionally been non-commercial. The commercialisation of solar ovens is not a worthwhile venture for entrepreneurs, since the manufacturing and sale of solar ovens may not provide the best return on investment.
Status of the technology and its future market potential top: The Temple Solar Project in Honduras finances, purchases, delivers and sets in operation large baking and cooking sun ovens in locations where natural fuels are depleted and populations are undernourished.
The large Villager Sun Ovens are the basis for self-supporting community bakeries to replace outdated and environmentally harmful methods of cooking and to provide new, healthy means for feeding the citizens in deprived areas of underdeveloped nations. The Temple Solar Project, a humanitarian service of Rotary Districthas brought the means for cooking and baking without fossil fuels to numerous communities in foreign lands where natural resources have been depleted or are at great risk Temple Solar Project, no date.Despite the popularity of solar cookers and various supportive actions for the development projects, there are still few barriers reported for the successful implementation of this technology around the globe, especially in the developing nations.
A stockbroker sells or buys stock on behalf of a customer. The stockbroker works as an agent matching up stock buyers and sellers. A transaction on a stock exchange must be made between two members of the exchange — a typical person may not walk into the New York Stock Exchange (for example), and ask to .
Story. Data Science for Tackling the Challenges of Big Data. This 6 week MIT online course consists of the following: Courseware (and Slides); Course Info (Course Updates & News)Discussion (Private).
Retail is the process of selling consumer goods or services to customers through multiple channels of distribution to earn a profit.
Retailers satisfy demand identified through a supply torosgazete.com term "retailer" is typically applied where a service provider fills the small orders of a large number of individuals, who are end-users, rather than large orders of a small number of wholesale. Consumer behaviour is the study of individuals, groups, or organizations and all the activities associated with the purchase, use and disposal of goods and services, including the consumer's emotional, mental and behavioural responses that precede or follow these activities.
Consumer behaviour emerged in the s and 50s as a distinct sub-discipline in the marketing torosgazete.com order to succeed. All types of business need advertising and marketing assistance to help generate awareness, interest, and ultimately, profit.
Obviously the Internet has changed the landscape of advertising by adding another media form, the presence of which appears to be everywhere.