The purpose of crop farming is to replace a mixed population of trees, plants and grasses with a dense population of a single species such as wheat or beans. In a monoculture, a single crop is permitted to grow, while competing plants are destroyed along with organisms that may infect or feed on the cultivated crop. Agriculture may be seen by ( Read more... )

The behavior of many non-linear dynamical systems as a function of time is found to ( Read more... )

Toni Terling Watt Ph.D, Are Small Schools and Private Shools Better?, Sociology of Education 2003, Vol. 76 (October): 344-367 ( Read more... )

Idag, den vedertagna teorien som förklarar fenomenet evolution är känd som ”det naturliga urvalet.” Denna teori visar att det finns diversitet inom varje art så att vissa individer inom en art har förmågan att anpassa sig och överleva mer än andra individer. En individ som överlever i en längre period kommer troligen att reproducera men en som ( Read more... )

The indigenous people of Scandinavia, known as the Sami, sometimes known to themselves as “the people of the sun and wind” inhabit the northern regions of Finland, Norway, Russia and Sweden. The Samis have an estimated population of 50,000 and live from reindeer herding, hunting, fishing and agriculture. They have lived in harmony with the harsh ( Read more... )

Kulramen var uppfunnen i Babylon 3000 talet tror vi. Några människor använder det fortforande. Om man är duktig med det är det snabbare än en kalkylatör. Det är också bra för blind människor. Den första mekaniska kalkylatör uppfinnades 1600-talet ( Read more... )

Fetma är ett tillstånd i vilket fett är förvarad i mycket högre mängder än vanligt och börjar att innebära ett problem för hälsan. Fetma kan ha flera olika orsaker. Det kan bero på genetisk disposition, en högenergi diet, en brist på motion, en ätstörning, och/eller stress ( Read more... )

Psychoanalysis. In the early 20th century, most theorists occupied themselves with the study of consciousness and biological determinants in behavior. Freud introduced the idea that human beings are also motivated by the unconscious. Freud recognized the importance of biology in behavior, which he referred to as instinct, a need or desire which ( Read more... )

There are two schools of thought about how religion is connected with social order. One theory is that religion is simply a reflection of society, while others argue that religion is a central force in society. The reality is most likely cyclical, but I am going to explore the idea that religion (or lack thereof) influences a society’s condition ( Read more... )