Foreword Bridging rivers, gorges, narrows, straits, and valleys always has played an important role in the history of human settlement. Since ancient times, bridges have been the most visible testimony of the noble craft of engineers. A bridge can be defined in many ways, but Andrea Palladio, the great 16th century Italian architect and engineer, hit on the essence of bridge building when he said "...bridges should befit the spirit of the community by exhibiting commodiousness, firmness, and delight." In more practical terms, he went on to explain that the way to avoid having the bridge carried away by the violence of water was to make the bridge without fixing any posts in the water. Since the beginning of time, the goal of bridge builders has been to create as wide a span as possible which is commodious, firm, and occasionally delightful
STRUCTURAL TESTING OF HOMEBUILTS Editor's Note: Alex Strojnik's Aviation articles on laminar flow in in all cases of new designs. He writings and aircraft designs have lightplane design, Alex designed also believes load testing may be in appeared in Sport Aviation many and built a very low drag powered order in a number of instances times in the past decade. A native sailplane, the S-2 (Sport Aviation, involving composite airframes. of Yugoslavia, Alex has very April 1982), which would become While there has been no history of impressive academic credentials. the first homebuilt motorglider in structural failure in composite
Velocity of slurry U= mean slurry velocity, Chemical resistance m/s Chemical Resistance ABS offers high chemical resistance Chemical resistance charts are a guide only Contaminated fluids can be highly corrosive Stress test recommended Preferred material for sewage treatment processes Ultra Violet Resistance ABS is suitable for outdoor installation Surface discolouration occurs only to a depth of 25m Structure of pipe wall is not weakened Glossy appearance changes to light grey Maintenance is reduced as there is no need to paint Questions? Thermoplastic Piping Design Comparison to Steel Thermal: Comparison with Expansion/Contraction GRP Cold Cut & Pull Codes & Standards Unsustained Loads Hydraulic Analysis Wind Selection of Pipe Earthquake Class Ship Pitch & Roll
01.2010 Juhendaja: Roode Liias ……………………….. Ülesande vastu võtnud: Tanel Friedenthal ………………………. Abstract How are 3D and BIM Changing the Design, Fabrication and Construction of Complex Steel Structures? The adoption of three-dimensional (3D) design and construction tools have created a remarkable shift in the building industry. Intelligent 3D technology in the form of Building Information Modeling (BIM) not only promises to improve the notoriously inefficient construction process, but also opens the door for designing new geometric shapes, which until recently have been considered unbuildable. Steel has been extensively used to build some of the most challenging architectural icons of the 21st century, due to its low weight and high strength in both compression and tension. Therefore, the steel
Introduction (slide 2) In this presentation I'd like to give a brief overview of clay bricks. I'll speak about 15min to allow time for questions at the end. Firstly clay bricks are known for centuries as one of the most solid and reliable structural elements is set to play a role in reducing global warming. Apart form the many benefits obtained from using clay bricks in construction, such as their durability, insulation properties and aesthetic qualities, recent findings show that they also produce less carbon emissions than any other masonry material. History (slide 3) In more detail the earliest bricks were dried bricks, meaning they were formed from clay-
Our home is family house with a large enclosed garden which is constrained with spruce hedge. My house was built in 1992 but it has been extensively modernised and extended since then. Our house consists a lot of different elements and components what I try to describe in my essay. The most important part of construction is foundation because it keeps buildings in one piece. My house has a strip foundation which is taken 1,5m below the ground to protect the structure against ground movement and damages. Due to the fact that foundation transfer the dead and imposed loads of the structure onto the ground it must be very solid and strong. Our foundation is made of pre cast concrete blocks which has a damp-proof course made of mastics on external side. There are sleeper wall after the concrete blocks to support the basement floor slabs. Next primary elements are the walls. My house has four crosswalls which have load bearing and enclosing role
4.04.4 Harmful to adult fish of many types which have not been progressively acclimated to low pH 3.53.9 Lethal to salmonids, although acclimated roach can survive for longer 3.03.4 Most fish are killed within hours at these levels Environmental effects Very obvious environmental effect of acid rain is the loss of fish in acid sensitive lakes and streams. Loads of fishes are not able to survive in acidic water. There are 2 ways acid rain effects lakes and streams: chronic and episodic. The first one is long-term process and this acidification is result from years of acidic rainfall. Episodic, on the other hand, is rapid change sudden jump in the acidity of water. Acid deposition may influence forest vegetation and soils. It removes soil nutrients such as calcium and magnesium from soils in high elevation forests
.........................................................................27 7.8 Measuring electricity..................................................................................................27 SOLAR ENERGY..............................................................................................................27 8.1 Photovoltaic energy...................................................................................................... 28 8.2 Solar thermal heat.......................................................................................................29 8.3 Solar thermal power plants......................................................................................... 30 8.4 Solar energy and the environment..............................................................................30 WIND ENERGY.................................................................................................................31 9
Digital designers usually do not like to delve into analog, and analog design- ers tend to avoid the digital realm. The two groups often do not even use the same buzzwords. Even though microprocessors have become increasingly faster and more capable, the real world remains analog in nature. The digital designers who attempt to control or measure the real world must somehow connect this analog environment to their digital machines. There are books about analog design and books about microprocessor design. This book attempts to get at the problems encountered in connecting the two together. This book came about because of a comment made by someone about my first book (Embedded Microprocessor Systems: Real World Design): “it needs more analog interfacing information.” I felt that adding this material to that book would cause the book to lose focus. However, the more I thought about it,
The Eiffel Tower English Tatyana Kareva 9a Form The Eiffel Tower The Eiffel Tower is an iron tower built on the Champ de Mars beside the Seine River in Paris. The tower has become a global icon of France and is one of the most recognizable structures in the world. Most visited monument Named after its designer, engineer Gustave Eiffel, the Eiffel Tower is the tallest building in Paris. More than 200,000,000 have visited the tower since its construction in 1889, making it the most visited paid monument in the world High Including the 24 m antenna, the structure is 325 m high (since 2000), which is equivalent to about 81 levels in a conventional building. Structure
Ergo Pikas Integration of Lean Construction and Building Information Modelling DISSERTATION Tallinn 2010 2 UNIVERSITY OF APPLIED SCIENCES Author: Ergo Pikas- Civil Engineering student, Faculty of Construction, Tallinn University of Applied Sciences Supervisor: Rafael Sacks- Associate Professor, Faculty of Civil and Env. Engineering, Technion Israel Institute of Technology
In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% (15% of global electricity generation),followed by solar hot water/heating, which contributed 1.3%. Modern technologies, such as geothermal energy, wind power, solar power, and ocean energy together provided some 0.8% of final energy consumption. While there are many large-scale renewable energy projects and production, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development.Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20100 watt) solar power systems sold per year. Some renewable energy technologies are criticised for being intermittent or unsightly, yet the market
Since the invention of the internal combustion engine, automotive engineers, speed junkies and racecar designers have been searching for ways to boost its power. One way to add power is to build a bigger engine. But bigger engines, which weigh more and cost more to build and maintain, are not always better. Another way to add power is to make a normal-sized engine more efficient. You can accomplish this by forcing more air into the combustion chamber. More air means more fuel can be added, and more fuel means a bigger explosion and greater horsepower. A turbo/supercharged engine produces more power overall than the same engine without the charging. Both superchargers and turbochargers do this. The difference between the two devices is their source of energy . TURBOCHARGER When people talk about race cars or high-performance sports cars, the topic of turbochargers usually comes up. Turbochargers also appear on large diesel engines. A turbo can significantly boost an engine's horsepowe
St. Catherine's Church (hence the passage name) and various large, ancient tombstones that used to line the inside of the sanctuary. On the southern portion of the passage, you'll find numerous artisan workshops, where you'll even get see them hard at work creating new items. City wall Tallinn's medieval city wall is a sub-facility that was built to protect the lower Tallinn and upper Tallinn (Toompea). The building of the city wall began in 1310th years, and by improving over time it formed the city wall with defensive buildings (towers). It was finished by the end of the 1561. Then it was 2.35-kilometer-long circular wall, which had 27 wall gate, 8 tower gate and 21 other stone fortifications. Many parts of the town wall have survived until today Great Coastal Gate (Suur Rannavärav) and Fat Margaret's Tower (Paks Margareeta)
access, and still end up with an unresponsive child. Such is life. As for class size, I think kids in quantity learn better, on average, than isolated children. I would like my children to have many friends, not few. This, too, I see as obvious. I'd rather have a house full of mess-making kids, than just one, lonely and uninspired. On the other hand, perhaps a student could learn enormously more from a tutor than in a classroom packed with other students. Again, there must be an ideal ratio, plus age considerations, as well as the nature of the topic being taught, to consider. A pet peeve of mine is how competitive athletics play an excessive role in schools. Schools cannot limit their scope to mere teaching of abstractions, such as algebra and grammar. They also need to instruct about health, including diet and exercise. Yet sports programs take too much money and time, which otherwise could be used in artistic endeavors, or to buy more
Its speed of operation was greater than comparable hardware then available. In recent months major faults have developed in the equipment. The local agent appears incapable of providing a reliable repair service. The system is regularly out of order for several days at a time. The makers have agreed to replace the system free of charge. The new equipment will not be installed for at least six months. Such a delay is clearly unacceptable to us. We should insist that ICN send their own engineer to service the equipment. The equipment should be transported to the ICN plant for inspection and repair there. When the ICN equipment was first introduced, it was found to provide a flexible and advanced system. Moreover, its speed of operation was greater than comparable hardware then available. However, in recent months major faults have developed in the equipment, and the local agent appears incapable of providing a reliable repair service.
oData transparency: In bit and byte oriented protocols, there is a problem if a control character (for ETX (End of Text) ·Same as ETB, only no more blocks will follow. ITB (End of > Differences with HDLC length of protocol field (1B or 2B) byte-oriented protocols) or the start-of-frame flag (for bit-oriented protocols) appears in the actual data. Intermediate Transmission Block) ·Same as ETB, except that the receiving statio Differs from HDLC because of multiaccess MAC that provides · Maximum payload length (default: 1500) This was not likely to happen in ASCII text, but is very likely with binary data
Beam trawls are used to harvest whitefish, mainly flatfish such as sole, plaice or megrim together with angler and other species found hard down on the seabed. Each net is fished from an outrigger boom, one on each side of the vessel (Figure 14), and towed from here on a single warp (a) shackled to a three chain bridle (b) attached directly to the beam (c) which holds open the mouth of the trawl. The beam, 9-12 m in length, is constructed from heavy steel tube and supported on each side by rugged steel trawlheads (d) which slide over the sea bottom. Ahead of each groundrope several tons of tickler chains (e) or chain mats (f) are used to disturb fish, causing them to rise up and be taken by the trawl following immediately behind. Towing speeds are generally higher than otter trawling, reaching 6 or 7 knots on clean ground with ticklers, whereas on rough ground stone mats are towed at around 4 knots
THE CITY OF LONDON History The City of London occupies one square mile in the middle of the capital. It once made up entire town of London, surrounded by the wall first built by Romans. The Romans also built a bridge over the Thames and there has been one in the same area ever since. The Roman Londinium grew up on the northern side of the bridge. In AD 61 the native Celtic tribe, led by Queen Boudicca, rose up against the Romans. They burnt down Londinium to the ground and killed most of its inhabitants. Roman armies eventually defeated Boudicca and Londinium was rebuilt. At the end of the fourth century AD the Roman Empire began to crumble and the Roman armies were recalled from Britain to defend Rome itself. Once they had left, tribes such as Angles, Saxons and Jutes invaded and settled in from Holland, Germany and Denmark
The corrosion-protected cones can be re-used – only the tie rods and threaded anchor plates remain in the concrete. • Simple and flexible planning With PERI SKSF 240 and SKS 180 single-sided climbing formwork, circular structures can also be concreted without undergoing any large planning process. Even use on inclined walls is feasible without any special measures because additional concrete loads or lifting forces can be safely transferred into the structure. Silla ja tunneli raketis The Modular System for Engineering Structures PERI engineers have created ideal project and connecting method combinations from known tunnel, bridge and construction engineering load combinations, and developed this to form a versatile construction kit. This means load-optimized and geometrically-adapted supporting formwork can be built from a large selection of system components.
During the 19th century, London was transformed into the world's largest city and capital of the British Empire. Its population expanded from 1 million in 1800 to 6.7 million a century later. During this period, London became a global political, financial, and trading capital. In this position, it was largely unrivaled until the latter part of the century, when Paris and New York began to threaten its dominance. The first railway to be built in London was a line from London Bridge to Greenwich, which opened in 1836. This was soon followed by the opening of great rail termini which linked London to every corner of Britain. These included Euston station (1837), Paddington station (1838), Fenchurch Street station (1841), Waterloo station (1848), King's Cross station (1850), and St Pancras station (1863). From 1863, the first lines of the London Underground were constructed.Parliament finally gave consent for the MBW to construct a massive system of sewers
10990 acknowledge In a sense, a code comprises a gigantic cipher alphabet, in which the basic plaintext unit is the word or the phrase; syllables and letters are supplied mainly to spell out words not present in the code. In ciphers, on the other hand, the basic unit is the letter, sometimes the letter-pair (digraph or bigram), very rarely larger groups of letters (polygrams). The substitution and transposition systems illustrated above are ciphers. There is no sharp theoretical dividing line between codes and ciphers; the latter shade into the former as they grow larger. But in modern practice the differences are usually quite marked. Sometimes the two are distinguished by saying that ciphers operate on plaintext units of regular length (all single letters or all groups of, say, three letters), whereas codes operate on plaintext groups of variable length (words, phrases, individual letters, etc.)
displayed in the Museum of London in the Barbican. At the end of the fourth century AD the Roman Empire began to crumble and the Roman armies were recalled from Britain to defend Rome itself. Once they had left Anglo-Saxons invaded and settled in Britain. They were farming people who preffered to live outside towns. For a while London probably lay in ruins, but it eventually developed again, partly because of its position on the river was good for trading. The Tower of London There is more of London's history in the Tower than anywhere else in London. It is the oldest surviving building in the capital. The Tower of London was begun by William the Conqueror in 1078 as a castle and a palace but even before the site had been used by the Romans and Anglo-Saxons. The tower comprises not one, but 20 towers, the oldest, the White Tower, dates back to the 11 th Century. The Roman stone wall, parts of which can still be seen on the territory of the
Philosophy Aristotle - four causes or better "becauses" because they are the 4 ways in which we use the word "because" or answer the question "why?" 1. Material cause: - what it is made of - why is the bridge strong? because made of steel 2. Formal cause: - what form, definition or property it has - why is this salt? because made of sodium and chloride 3. Efficient cause: - what initiated the change or movement - why did the baseball move? because someone hit it 4. Final cause: - what end or goal does it have? - why does he walk? because he wants to be healthy
1 Wave energy Introduction to wave energy There are several possibilities to harvest different forms of energy from the sea. One of these options is the usage of waves for the generation of electricity. The devices needed to perform this task are called wave energy converters. Wave energy is indirect solar energy in twice. At first there is the wind, which is caused by variations in atmospheric pressure due to a differential solar heating of earth's surface by the sun. Different regions of pressure drives a force which rises a movement of atmospheric air masses that causes the earths wind system. If wind strikes over the surface of an open water, waves are induced. First they are very flat with only a low level of energy. When there is a long distance over
platform support, code reuse, ease of development, the availability of tools, reliability and stability, good documentation, continuing support from Sun Microsystems, low development costs, the ability to use legacy code (e.g. C, C++), and increased programmer productivity. The portability of Java is sometimes overstated games in particular often require some `tweaking' to improve their performance on different OSes/machines, such as in the scheduling of threads, data structure and/or algorithm design, or the choice of GUI components. Also, if legacy code written in a different language is utilised then portability is frequently compromised. Productivity is an important advantage, although hard to quantify. An old study from 1998 suggested that software written in pure Java instead of C++ results in a 25% overall time/cost saving, corresponding to an overall productivity increase of 30% (the increase for the code phase alone is 65%) [Quinn and Christiansen 1998]
e. in the "open" capillary. So in this case we speak of socalled free zone electrophoresis. Necessary for this separation technology devices must 4 create a field strength of 200 to 400 V / cm to provide sufficient ion mobility. Voltage, depending on the capillary length, lies between 5 and 25 kV. Typical operating parameters of capillary electrophoresis are presented in Table. 1. Table 1: Typical parameters of CE Inner diameter of the capillary 20100 μm Capillary lenght 100150 cm Voltage across the capillary 1030 kV Current rate 10100 μA
..............................................................16 A New Heaven and a new Earth...............................................................18 Chapter Two Ego: The Current State of Humanity – 19 The Illusory Self......................................................................................20 The Voice in the Head.............................................................................22 Content and Structure of the Ego.............................................................24 Identification with Things........................................................................25 The Lost Ring...........................................................................................26 The Illusion of Ownership........................................................................29 Wanting: The Need for More....................................................................31
PSYCHOLOGY PART 1: CORE Biological level of analysis Outline principles that define the biological level of analysis. 1) Behavior can be innate, because it is genetically based. Evolution may play a key role in behavior. 2) Animals may be studied as a means of understanding human behavior. 3) There are biological correlates of behavior. Cognitions, emotions and behaviors are products of the anatomy and physiology of our nervous and endocrine system. Explain how principles of the biological level of analysis may be demonstrated in research. 1) Correlational studies: Study by Buss, who hypothesized that across cultures, men will prefer to marry younger women because of greater reproductive capacity and women will place greater value on a potential mate's earning
but is ineffective or far from optimal in practice.[1][2] The term was coined in 1995 by Andrew Koenig,[3] inspired by Gang of Four's book Design Patterns, which developed the concept of design patterns in the software field. The term was widely popularized three years later by the book AntiPatterns, which extended the use of the term beyond the field of software design and into general social interaction. According to the authors of the latter, there must be at least two key elements present to formally distinguish an actual anti- pattern from a simple bad habit, bad practice, or bad idea: · Some repeated pattern of action, process or structure that initially appears to be beneficial, but ultimately produces more bad consequences than beneficial results, and · A refactored solution that is clearly documented, proven in actual practice and repeatable.
unsuccessful. They made their way to the river Thames and sailed up it. The Romans knew it was important to control a crossing point at the river Thames, so they decided to build a settlement on the north bank. Although small settlements had been built on the banks of the Thames, the Romans were the ones who built the first city. They called their city Londinium. The Roman engineers noticed that the point where the swampy river narrowed would make an ideal crossing point, they built London Bridge. Less than 20 years later the native Iceni tribe, led by Queen Boudicca, rose up against the Romans in revenge for mistreatment and burnt Londinium to the ground. The well disciplined Roman army defeated her forces and Londinium was rebuilt. By AD 100 it had also become the capital of the Roman province. A massive wall was built to protect the city from further attacks. The Roman Empire came under increasing attack across Europe and in AD 410 they retreated.
Association: Multiplicity • Unspecified • Exactly one 1 • Zero or more (many, unlimited) 0..* • One or more 1..* • Zero or one 0..1 • Specified range 3..7 • Multiple, disjoint ranges 2, 5..7 II Relationships: Dependency • A relationship between two model elements where a change in one may cause a change in the other • Non-structural, “using” relationship III Relationships: Generalization • A relationship among classes where one class shares the structure and/or behavior of one or more classes • Defines a hierarchy of abstractions in which a subclass inherits from one or more superclasses – Single inheritance – Multiple inheritance • Generalization is an “is-a-kind of” relationship What Gets Inherited? • A subclass inherits its parent’s attributes, operations, and relationships • A subclass may: – Add additional attributes, operations, relationships – Redefine inherited operations (use caution!)
A railgun consists of two parallel metal rails connected to an electrical power supply. When a conductive projectile is inserted between the rails connected to the power supply it completes the circuit. Electrons flow from the negative terminal of the power supply up the negative rail, across the projectile, and down the positive rail, back to the power supply. This current makes the railgun behave as an electromagnet, creating a magnetic field inside the loop formed by the length of the rails up to the position of the armature. In accordance with the right-hand rule, the magnetic field circulates around each conductor. Since the current is in the opposite direction along each rail, the net magnetic field between the rails is directed at right angles to the plane formed by the central axes of the rails and the armature. In combination with the current in the armature, this produces a Lorentz force which accelerates the projectile along
annaabi.ee 
Sisene Facebook'ga
Sisene Google'ga
Sisene LinkedIn'ga
