Engineering is the application of knowledge in the form of science and empirical evidence, to the innovation, construction and maintenance of structures, materials, devices, systems and organizations. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, types of application. See glossary of engineering; the term engineering is derived from the Latin ingenium, meaning "cleverness" and ingeniare, meaning "to contrive, devise". The American Engineers' Council for Professional Development has defined "engineering" as: The creative application of scientific principles to design or develop structures, apparatus, or manufacturing processes, or works utilizing them singly or in combination. Engineering has existed since ancient times, when humans devised inventions such as the wedge, lever and pulley; the term engineering is derived from the word engineer, which itself dates back to 1390 when an engine'er referred to "a constructor of military engines."
In this context, now obsolete, an "engine" referred to a military machine, i.e. a mechanical contraption used in war. Notable examples of the obsolete usage which have survived to the present day are military engineering corps, e.g. the U. S. Army Corps of Engineers; the word "engine" itself is of older origin deriving from the Latin ingenium, meaning "innate quality mental power, hence a clever invention."Later, as the design of civilian structures, such as bridges and buildings, matured as a technical discipline, the term civil engineering entered the lexicon as a way to distinguish between those specializing in the construction of such non-military projects and those involved in the discipline of military engineering. The pyramids in Egypt, the Acropolis and the Parthenon in Greece, the Roman aqueducts, Via Appia and the Colosseum, Teotihuacán, the Brihadeeswarar Temple of Thanjavur, among many others, stand as a testament to the ingenuity and skill of ancient civil and military engineers.
Other monuments, no longer standing, such as the Hanging Gardens of Babylon, the Pharos of Alexandria were important engineering achievements of their time and were considered among the Seven Wonders of the Ancient World. The earliest civil engineer known by name is Imhotep; as one of the officials of the Pharaoh, Djosèr, he designed and supervised the construction of the Pyramid of Djoser at Saqqara in Egypt around 2630–2611 BC. Ancient Greece developed machines in both military domains; the Antikythera mechanism, the first known mechanical computer, the mechanical inventions of Archimedes are examples of early mechanical engineering. Some of Archimedes' inventions as well as the Antikythera mechanism required sophisticated knowledge of differential gearing or epicyclic gearing, two key principles in machine theory that helped design the gear trains of the Industrial Revolution, are still used today in diverse fields such as robotics and automotive engineering. Ancient Chinese, Greek and Hungarian armies employed military machines and inventions such as artillery, developed by the Greeks around the 4th century BC, the trireme, the ballista and the catapult.
In the Middle Ages, the trebuchet was developed. Before the development of modern engineering, mathematics was used by artisans and craftsmen, such as millwrights, clock makers, instrument makers and surveyors. Aside from these professions, universities were not believed to have had much practical significance to technology. A standard reference for the state of mechanical arts during the Renaissance is given in the mining engineering treatise De re metallica, which contains sections on geology and chemistry. De re metallica was the standard chemistry reference for the next 180 years; the science of classical mechanics, sometimes called Newtonian mechanics, formed the scientific basis of much of modern engineering. With the rise of engineering as a profession in the 18th century, the term became more narrowly applied to fields in which mathematics and science were applied to these ends. In addition to military and civil engineering, the fields known as the mechanic arts became incorporated into engineering.
Canal building was an important engineering work during the early phases of the Industrial Revolution. John Smeaton was the first self-proclaimed civil engineer and is regarded as the "father" of civil engineering, he was an English civil engineer responsible for the design of bridges, canals and lighthouses. He was a capable mechanical engineer and an eminent physicist. Using a model water wheel, Smeaton conducted experiments for seven years, determining ways to increase efficiency. Smeaton introduced iron gears to water wheels. Smeaton made mechanical improvements to the Newcomen steam engine. Smeaton designed the third Eddystone Lighthouse where he pioneered the use of'hydraulic lime' and developed a technique involving dovetailed blocks of granite in the building of the lighthouse, he is important in the history, rediscovery of, development of modern cement, because he identified the compositional requirements needed to obtain "hydraulicity" in lime.
Luxembourg the Grand Duchy of Luxembourg, is a small landlocked country in western Europe. It is bordered by Belgium to the west and north, Germany to the east, France to the south, its capital, Luxembourg City, is one of the three official capitals of the European Union and the seat of the European Court of Justice, the highest judicial authority in the EU. Its culture and languages are intertwined with its neighbours, making it a mixture of French and German cultures, as evident by the nation's three official languages: French and the national language, Luxembourgish; the repeated invasions by Germany in World War II, resulted in the country's strong will for mediation between France and Germany and, among other things, led to the foundation of the European Union. With an area of 2,586 square kilometres, it is one of the smallest sovereign states in Europe. In 2018, Luxembourg had a population of 602,005, which makes it one of the least-populous countries in Europe, but by far the one with the highest population growth rate.
Foreigners account for nearly half of Luxembourg's population. As a representative democracy with a constitutional monarch, it is headed by Grand Duke Henri and is the world's only remaining grand duchy. Luxembourg is a developed country, with an advanced economy and one of the world's highest GDP per capita; the City of Luxembourg with its old quarters and fortifications was declared a UNESCO World Heritage Site in 1994 due to the exceptional preservation of the vast fortifications and the old city. The history of Luxembourg is considered to begin in 963, when count Siegfried I acquired a rocky promontory and its Roman-era fortifications known as Lucilinburhuc, ′little castle′, the surrounding area from the Imperial Abbey of St. Maximin in nearby Trier. Siegfried's descendants increased their territory through marriage and vassal relations. At the end of the 13th century, the Counts of Luxembourg reigned over a considerable territory. In 1308, Henry VII, Count of Luxembourg became King of the Germans and Holy Roman Emperor.
The House of Luxembourg produced four Holy Roman Emperors during the high Middle Ages. In 1354, Charles IV elevated the County to the Duchy of Luxembourg. Since Sigismund had no male heir, the Duchy became part of the Burgundian Circle and one of the Seventeen Provinces of the Habsburg Netherlands. Over the centuries, the City and Fortress of Luxembourg, of great strategic importance situated between the Kingdom of France and the Habsburg territories, was built up to be one of the most reputed fortifications in Europe. After belonging to both the France of Louis XIV and the Austria of Maria Theresia, Luxembourg became part of the First French Republic and Empire under Napoleon; the present-day state of Luxembourg first emerged at the Congress of Vienna in 1815. The Grand-Duchy, with its powerful fortress, became an independent state under the personal possession of William I of the Netherlands with a Prussian garrison to guard the city against another invasion from France. In 1839, following the turmoil of the Belgian Revolution, the purely French-speaking part of Luxembourg was ceded to Belgium and the Luxembourgish-speaking part became what is the present state of Luxembourg.
Luxembourg is a founding member of the European Union, OECD, United Nations, NATO, Benelux. The city of Luxembourg, the country's capital and largest city, is the seat of several institutions and agencies of the EU. Luxembourg served on the United Nations Security Council for the years 2013 and 2014, a first in the country's history; as of 2018, Luxembourgish citizens had visa-free or visa-on-arrival access to 186 countries and territories, ranking the Luxembourgish passport 5th in the world, tied with Austria, the Netherlands, Portugal, the United Kingdom and the United States. The recorded history of Luxembourg begins with the acquisition of Lucilinburhuc situated on the Bock rock by Siegfried, Count of Ardennes, in 963 through an exchange act with St. Maximin's Abbey, Trier. Around this fort, a town developed, which became the centre of a state of great strategic value. In the 14th and early 15th centuries, three members of the House of Luxembourg reigned as Holy Roman Emperors. In 1437, the House of Luxembourg suffered a succession crisis, precipitated by the lack of a male heir to assume the throne, which led to the territories being sold by Duchess Elisabeth to Philip the Good of Burgundy.
In the following centuries, Luxembourg's fortress was enlarged and strengthened by its successive occupants, the Bourbons, Habsburgs and the French. After the defeat of Napoleon in 1815, Luxembourg was disputed between Prussia and the Netherlands; the Congress of Vienna formed Luxembourg as a Grand Duchy within the German Confederation. The Dutch king became, in the grand duke. Although he was supposed to rule the grand duchy as an independent country with an administration of its own, in reality he treated it to a Dutch province; the Fortress of Luxembourg was manned by Prussian troops for the German Confederation. This arrangement was revised by the 1839 First Treaty of London, from which date Luxembourg's full independence is reckoned. At the time of the Belgian Revolution of 1830–1839, by the 1839 Treaty establishing full independence, Luxembourg's territory was reduced by more than half, as the predominantly francophone western part of the country was transferred to Belgium. In 1842 Luxembourg joined the German Customs Union (Zoll
Project management is the practice of initiating, executing and closing the work of a team to achieve specific goals and meet specific success criteria at the specified time. The primary challenge of project management is to achieve all of the project goals within the given constraints; this information is described in project documentation, created at the beginning of the development process. The primary constraints are scope, time and budget; the secondary – and more ambitious – challenge is to optimize the allocation of necessary inputs and apply them to meet pre-defined objectives. The object of project management is to produce a complete project which complies with the client's objectives. In many cases the object of project management is to shape or reform the client's brief in order to feasibly be able to address the client's objectives. Once the client's objectives are established they should influence all decisions made by other people involved in the project – for example project managers, designers and sub-contractors.
Ill-defined or too prescribed project management objectives are detrimental to decision making. A project is a temporary endeavor designed to produce a unique product, service or result with a defined beginning and end undertaken to meet unique goals and objectives to bring about beneficial change or added value; the temporary nature of projects stands in contrast with business as usual, which are repetitive, permanent, or semi-permanent functional activities to produce products or services. In practice, the management of such distinct production approaches requires the development of distinct technical skills and management strategies; until 1900, civil engineering projects were managed by creative architects and master builders themselves, for example, Christopher Wren, Thomas Telford and Isambard Kingdom Brunel. In the 1950s organizations started to systematically apply project-management tools and techniques to complex engineering projects; as a discipline, project management developed from several fields of application including civil construction and heavy defense activity.
Two forefathers of project management are Henry Gantt, called the father of planning and control techniques, famous for his use of the Gantt chart as a project management tool. Both Gantt and Fayol were students of Frederick Winslow Taylor's theories of scientific management, his work is the forerunner to modern project management tools including work breakdown structure and resource allocation. The 1950s marked the beginning of the modern project management era where core engineering fields come together to work as one. Project management became recognized as a distinct discipline arising from the management discipline with engineering model. In the United States, prior to the 1950s, projects were managed on an ad-hoc basis, using Gantt charts and informal techniques and tools. At that time, two mathematical project-scheduling models were developed; the "critical path method" was developed as a joint venture between DuPont Corporation and Remington Rand Corporation for managing plant maintenance projects.
The "program evaluation and review technique", was developed by the U. S. Navy Special Projects Office in conjunction with the Lockheed Corporation and Booz Allen Hamilton as part of the Polaris missile submarine program. PERT and CPM are similar in their approach but still present some differences. CPM is used for projects. PERT, on the other hand, allows for stochastic activity times; because of this core difference, CPM and PERT are used in different contexts. These mathematical techniques spread into many private enterprises. At the same time, as project-scheduling models were being developed, technology for project cost estimating, cost management and engineering economics was evolving, with pioneering work by Hans Lang and others. In 1956, the American Association of Cost Engineers was formed by early practitioners of project management and the associated specialties of planning and scheduling, cost estimating, cost/schedule control. AACE continued its pioneering work and in 2006 released the first integrated process for portfolio and project management.
In 1969, the Project Management Institute was formed in the USA. PMI publishes A Guide to the Project Management Body of Knowledge, which describes project management practices that are common to "most projects, most of the time." PMI offers a range of certifications. Project management can apply to any project, but it is tailored to accommodate the specific needs of different and specialized industries. For example, the construction industry, which focuses on the delivery of things like buildings and bridges, has developed its own specialized form of project management that it refers to as construction project management and in which project managers can become trained and certified; the information technology industry has evolved to develop its own form of project management, referred to as IT project manag
United Arab Emirates
The United Arab Emirates, sometimes called the Emirates, is a country in Western Asia at the southeast end of the Arabian Peninsula on the Persian Gulf, bordering Oman to the east and Saudi Arabia to the south, as well as sharing maritime borders with Qatar to the west and Iran to the north. The sovereign constitutional monarchy is a federation of seven emirates consisting of Abu Dhabi, Dubai, Ras Al Khaimah and Umm Al Quwain, their boundaries are complex, with numerous enclaves within the various emirates. Each emirate is governed by a ruler. One of the rulers serves as the President of the United Arab Emirates. In 2013, the UAE's population was 9.2 million, of which 1.4 million are Emirati citizens and 7.8 million are expatriates. Human occupation of the present UAE has been traced back to the emergence of anatomically modern humans from Africa some 125,000 BCE through finds at the Faya-1 site in Mleiha, Sharjah. Burial sites dating back to the Neolithic Age and the Bronze Age include the oldest known such inland site at Jebel Buhais.
Known as Magan to the Sumerians, the area was home to a prosperous Bronze Age trading culture during the Umm Al Nar period, which traded between the Indus Valley and Mesopotamia as well as Iran and the Levant. The ensuing Wadi Suq period and three Iron Ages saw the emergence of nomadism as well as the development of water management and irrigation systems supporting human settlement in both the coast and interior; the Islamic age of the UAE dates back to the expulsion of the Sasanians and the subsequent Battle of Dibba. The UAE's long history of trade led to the emergence of Julfar, in the present day emirate of Ras Al Khaimah, as a major regional trading and maritime hub in the area; the maritime dominance of the Persian Gulf by Emirati traders led to conflicts with European powers, including the Portuguese and British. Following decades of maritime conflict, the coastal emirates became known as the Trucial States with the signing of a Perpetual Treaty of Maritime Peace with the British in 1819, which established the Trucial States as a British Protectorate.
This arrangement ended with independence and the establishment of the United Arab Emirates on 2 December 1971 following the British withdrawal from its treaty obligations. Six emirates joined the UAE in 1971, the seventh, Ras Al Khaimah, joined the federation on 10 February 1972. Islam is the official religion and Arabic is the official language of the UAE; the UAE's oil reserves are the seventh-largest in the world while its natural gas reserves are the world's seventeenth-largest. Sheikh Zayed, ruler of Abu Dhabi and the first President of the UAE, oversaw the development of the Emirates and steered oil revenues into healthcare and infrastructure; the UAE's economy is the most diversified in the Gulf Cooperation Council, while its most populous city of Dubai is an important global city and an international aviation and maritime trade hub. The country is much less reliant on oil and gas than in previous years and is economically focusing on tourism and business; the UAE government does not levy income tax although there is a system of corporate tax in place and value added tax was established in 2018 at 5%.
The UAE's rising international profile has led to it being recognised as a regional and a middle power. It is a member of the United Nations, the Arab League, the Organisation of Islamic Cooperation, OPEC, the Non-Aligned Movement and the Gulf Cooperation Council; the land of the Emirates has been occupied for thousands of years. Stone tools recovered from Jebel Faya in the emirate of Sharjah reveal a settlement of people from Africa some 127,000 years ago and a stone tool used for butchering animals discovered at Jebel Barakah on the Arabian coast suggests an older habitation from 130,000 years ago. There is no proof of contact with the outside world at that stage, although in time lively trading links developed with civilisations in Mesopotamia and the Harappan culture of the Indus Valley; this contact persisted and became wide-ranging motivated by the trade in copper from the Hajar Mountains, which commenced around 3,000 BCE. Sumerian sources talk of the UAE as home to Magan people. There are six major periods of human settlement with distinctive behaviours in the pre-Islamic UAE, which includes the Hafit period from 3,200-2,600 BCE.
From 1,200 BC to the advent of Islam in Eastern Arabia, through three distinctive Iron Ages and the Mleiha period, the area was variously occupied by Achaemenid and other forces and saw the construction of fortified settlements and extensive husbandry thanks to the development of the falaj irrigation system. In ancient times, Al Hasa adjoined Greater Oman. From the second century AD, there was a movement of tribes from Al Bahreyn towards the lower Gulf, together with a migration among the Azdite Qahtani and Quda'ah tribal groups from south-west Arabia towards central Oman; the spread of Islam to the North Eastern tip of the Arabian Peninsula is thought to have followed directly from a letter sent by the Islamic prophet, Muhammad, to the rulers of Oman in 630 AD, nine years after the hijrah. This led to a group of rulers travelling to Medina, converting to Islam and subsequently driving a successful u
Uzbekistan also the Republic of Uzbekistan, is a landlocked country in Central Asia. The sovereign state is a secular, unitary constitutional republic, comprising 12 provinces, one autonomous republic, a capital city. Uzbekistan is bordered by five landlocked countries: Kazakhstan to the north. Along with Liechtenstein, it is one of the world's only two doubly landlocked countries. What is now Uzbekistan was in ancient times part of the Iranian-speaking region of Transoxiana and Turan; the first recorded settlers were Eastern Iranian nomads, known as Scythians, who founded kingdoms in Khwarezm, Sogdia and Margiana. The area was incorporated into the Persian Empire and, after a period of Macedonian Greek rule, was ruled by the Persian Parthian Empire and by the Sasanian Empire, until the Muslim conquest of Persia in the 7th century; the Muslim conquest in the 7th century converted the majority of the population, including the local ruling classes, into adherents of Islam. During this period, cities such as Samarkand and Bukhara began to grow rich from the Silk Road.
The local Khwarezmian dynasty, Central Asia as a whole, were decimated by the Mongol invasion in the 13th century. After the Mongol Conquests, the area became dominated by Turkic peoples; the city of Shahrisabz was the birthplace of the Turco-Mongol warlord Timur known as one of Genghis Khan's grandchildren, who in the 14th century established the Timurid Empire and was proclaimed the Supreme Emir of Turan with his capital in Samarkand. The area was conquered by Uzbek Shaybanids in the 16th century, moving the centre of power from Samarkand to Bukhara; the region was split into three states: Khanate of Khiva, Khanate of Kokand, Emirate of Bukhara. It was incorporated into the Russian Empire during the 19th century, with Tashkent becoming the political center of Russian Turkestan. In 1924, after national delimitation, the constituent republic of the Soviet Union known as the Uzbek Soviet Socialist Republic was created. Following the breakup of the Soviet Union, it declared independence as the Republic of Uzbekistan on 31 August 1991.
Uzbekistan has a diverse cultural heritage due to strategic location. Its first major official language is Uzbek, a Turkic language written in the Latin alphabet and spoken natively by 85% of the population. Russian has widespread use as a governmental language. Uzbeks constitute 81% of the population, followed by Russians, Tajiks and others. Muslims constitute 79% of the population while 5% of the population follow Russian Orthodox Christianity, 16% of the population follow other religions or are non-religious. A majority of Uzbeks are non-denominational Muslims. Uzbekistan is a member of the CIS, OSCE, UN, the SCO. While a democratic republic, by 2008 non-governmental human rights organizations defined Uzbekistan as "an authoritarian state with limited civil rights". Following the death of Islam Karimov in 2016, the second president, Shavkat Mirziyoyev, started a new course, described as a A Quiet Revolution and Revolution from Above, he stated he intended to abolish cotton slavery, systematic use of child labour, exit visas, to introduce a tax reform, create four new free economic zones, as well as amnestied some political prisoners.
The relations with neighboring countries of Tajikistan and Afghanistan drastically improved. However, the Amnesty International report on human rights in the country for 2017/2018 described continued repressive measures, including forced labour in cotton harvesting, restrictions on movements of'freed' prisoners; the Uzbek economy is in a gradual transition to the market economy, with foreign trade policy being based on import substitution. In September 2017, the country's currency became convertible in the market rates. Uzbekistan is a major exporter of cotton; the country operates the largest open-pit gold mine in the world. With the gigantic power-generation facilities of the Soviet era and an ample supply of natural gas, Uzbekistan has become the largest electricity producer in Central Asia. Renewable energy constitutes more than 23% of the country's energy sector, with hydroelectricity and solar energy having 21.4% and 2% respectively. Uzbekistan has an area of 447,400 square kilometres, it is the 56th largest country in the 42nd by population.
Among the CIS countries, it is the 2nd largest by population. Uzbekistan lies between latitudes 37° and 46° N, longitudes 56° and 74° E, it stretches 1,425 kilometres from west to east and 930 kilometres from north to south. Bordering Kazakhstan and the Aralkum Desert to the north and northwest and Afghanistan to the southwest, Tajikistan to the southeast, Kyrgyzstan to the northeast, Uzbekistan is one of the largest Central Asian states and the only Central Asian state to border all the other four. Uzbekistan shares a short border with Afghanistan to the south. Uzbekistan is a landlocked country, it is one of two doubly landlocked countries in the world (that is, a country completel