Tourism and environment Research Paper Example | Topics and Well Written Essays - 1250 words

Tourism and environment - Research Paper Example This paper briefly explains the negative impacts of tourism on culture, history and environment of a country. Culture is an important aspect of a country which gives a unique look to the country. For example, Nepal is the only Hindu country in the world whereas Saudi Arabia is witnessed as a traditional Muslim country. Tourism is an opportunity of the locals to know more about the external world. The Muslim dominated Middle East region is advanced rapidly because of the contributions of the westerners. The technology used for extracting the oil from the underground sources by the Middle Eastern countries as are borrowed from the westerners. In fact, in many of the critical positions in Middle East, westerners are working. Emirates Airlines has become one of the best airliners of the world mainly because of the contributions from the managing director, Maurice Flanagan. Thus tourism has many positive effects on cultures. â€Å"While presenting a culture to tourists may help preserve the culture, it can also dilute or even destroy it. The point is to promote tourism in the region so that it would both give incomes and create respect for the local tradition and culture† (Mirbabayev & Shagazatova). Tourism can damage the local culture in many ways. For example, lot of people from Middle East has started to imitate the dress codes and hairstyles of the westerners leaving their traditional dresses and fashion concepts behind. Moreover they started to change even their food habits because of the influence of the westerners. At present, in Middle East, most of the companies are looking for US or UK educated youths for hiring. Traditions and customs can also be changed because of the influence of tourists on a country’s culture. â€Å"Large hotel chain restaurants often import food to satisfy foreign visitors and rarely employ local staff for senior management positions, preventing local farmers and workers from reaping

Fire dynamics Dissertation Example | Topics and Well Written Essays - 3000 words

Fire dynamics - Dissertation Example At 250-300 degrees room temperature, creep has little effect on the performance on the steel structure since the amount and distribution of the effects of steel remain uniform hence any deformations occur at a slow pace. As the fire crib is set to temperatures of 0.25/0.5 MegaWatt, recorded by a thermal imaging camera, creep starts to become a dominating factor (Totten, 2007). Deformation starts to occur as the vacancies in the crystal structure diffuse to the location of a dislocation hence the dislocations move faster to an adjacent slip plane. As the temperature of steel increases so does the creep deformations. Depending on its material composition, steel’s melting point stands at 1400 degrees Celsius. Therefore, creep deformations will become noticeable at temperatures corresponding to 30% of its melting point. Creep strain has three phases which include: Primary creep/ Initial phase Steady-state creep/ Secondary creep Tertiary creep At the initial phase, the strain rate is high and increases at a steady rate, that is, it is directly proportional to temperature. On almost entering the secondary creep phase, it decreases gradually. At the steady state creep, the strain rate reaches a minimum and is almost constant. At the tertiary creep phase, the strain rate increases exponentially as temperature increases. ... sius), time zero (0), the strain on the structure is minimal, and as the curve shows, strain is always present even at normal conditions that are; steel is always undergoing strain in its normal conditions due to it general makeup which contains soluble atoms (Totten, 2007). A retardant rock wool which is welded to a steel structure aimed at adding extra heat protection reduces the effect of exposing a steel structure to long hours of heat. Although creep has a great detrimental effect on this steel structure, the extra fire protection (retardant rock wool) that is welded to the structure main objective is combating this effect (Totten, 2007). This material, which is fire resistant, tolerates temperatures of up to 1000 degrees Celsius and does not burn. It remains stable when exposed to such high temperatures. The retardant rock wool acts as an insulator in the sense that; it has an R-value which means that it has a resistance to heat flow providing rates as from 4.4dB for the 5mm th ickness of steel. Metals do not react well when exposed to fire for a very long time. When it is heated, the molecular structure of the metal becomes weak and loses its strength at over five hundred degrees Celsius. This cause the collapse of metal buildings as the metal warps and melts slightly under extreme temperatures. However, this takes a longer time and has no effect on the evacuation of the metal structure (Totten, 2007). Under normal circumstance, water reacts with metal to form rust. The surface rust is not harmful, but when exposed continuously to unprotected metal it leads to severe corrosion. Additionally, when the building is exposed to heat source for a long time, their mechanical strength of the building will decrease and thus their properties will become more dependent on