docstxt/14458529860015.txt
-5*2/1=10rad/s t*T/J 29. If J = 12, what torque is required to provide acceleration of 5? -12*5=60Nm 30. If J = 5 and T = 5, what time is needed to reach the speed of 5? -5*5/5=5s I*w/T 2. Quiz on Electrical Drive Characteristics 1. Name the typical kinds of the time response processes. 2. What units are used to measure the drive quick action? 3. What units are used to measure the time constants? 4. What is the usual accuracy range of the accurate drives? 5. Does the mechanical time constant depend on the start-up speed? 6. How can the electromagnetic time constant be calculated? 7. Which time constant is usually the longest and which one is the shortest ? thermal, mechanical, or electromagnetic? 8. Does the mechanical time constant depend on the steady-state torque? 9. How does the drive speed action depend on the time constants? 10. Does the drive overspeed affects the drive accuracy? 11. How does the drive overcurrent affects the drive speed action? 12
milking machine • Development of a usable milking machine took several decades of trial and error. • Some editors of 19th century dairy and ag publications acknowledged a need for a good milking machine, but, were dissatisfied with all that were being offered. Others discouraged all attempts at machine milking, stating that it was unnatural or intrinsically injurious to the cow. . Early Cow Milking Machines • The earliest devices for mechanical milking were tubes inserted in the teats to force open the sphincter muscle, thus allowing the milk to flow. • Skillfully made tubes of pure silver, gutta percha, ivory, and bone were marketed in the mid-19th century, and, in fact, a few were still being sold well into the 20th century. • A novel milking tube illustrated in the Scientific American in 1875, used a slide valve at the bottom of each catheter to close off the opening. • Several U.S
Renaissance era Modern era ANCIENT ERA Stand as a testament to the ingenuity and skill of the ancient engineers Earliest civil engineer Imhotep, officials of the Djoser, designed Pyramid of Djoser at Saqqara Ancient Greece developed machines, civilian and military domains Chinese and Roman armies, military machines, Ballista and catapult MIDDLE ERA Al-Jazari, five machines to pump water, Turkish Artuqid dynasty 50 ingenious mechanical devices, developed segmental gears, mechanical controls, escapement mechanisms, clocks, robotics etc. Protocols for designing and manufacturing methods RENAISSANCE ERA First electrical engineer: William Gilbert First steam engine, 1698, Thomas Savery, rise to the industrial revolution, mass production Rise of engineering as a profession, 18th century Mechanicals arts, incorporated into engineering MODERN ERA
FOREST
INSECTS
The control of forest insects: general considerations
oma uurimis- ja ravimeetodi ning oli rahvusvaheliselt tunnustatud selja- ja kaelavaevuste diagnostika ja ravi asjatundja McKenzie Instituut moodustati 1982, tagamaks süstemaatilise koolituse arstidele ja füsioterapeutidele Täna on McKenzie Instituudi harusid üle maailma 26 riigis Meile lähim instituudi haru asub Soomes Kursuseid korraldatakse ka riikides, kus instituudi harukontoreid pole veel loodud McKenzie meetod The McKenzie method Mechanical Diagnosis and Therapy (MTD mehhaaniline diagnostika ja teraapia) Selle meetodiga analüüsitakse patsientide sümptoomide (valu) vastust korduvale mehhaanilisele lõppulatusega selja stimulatsioonile (selja sirutusele) McKenzie meetodi staadiumid 1. Hindamine McKenzie meetod algab kõikehõlmava ja loogilise samm-sammulise protsessiga, kus sinu probleemi hinnatakse. Terapeut palub sul teha teatud liigutusi, samal ajal hinnates sümptomi muutusi. 2
Limitations · The large mass of the batteries. · Battery charging time, but there are ways to "quick charge" to the part-time battery capacity. · In most cases, low dynamic performance. · In some hybrids in general there are no electric batteries. · The major auto companies after the 2000s, paid little attention to electric cars in favor of hybrids. and many other Advantages · Overall simplicity of design and management in comparison with hybrid vehicles. · lower number mechanical parts and components. · Improved reliability. · Ease of repair and service, and as a result, and lower operation cost. · Less pollution. No transmission unlike mechanical hybrids. modern Application The world leader in electric transportation - China. widely used in various enterprises are widely used for transportation of goods in railway stations, shops and large stores, as well as an attraction. models electric cars
, 70- , . 12 . . In Russia, in the 1780s, Ivan Kulibin developed a human-pedalled, three-wheeled carriage with modern features such as a flywheel, brake, gear box, and bearings; however, it was not developed further Ivan Petrovich Kulibin (April 21, 1735 - August 11, 1818) was a Russian mechanic and inventor. He was born in Nizhny Novgorod in the family of a trader. From childhood, Kulibin displayed an interest in constructing mechanical tools. Soon, clock mechanisms became a special interest of his. During 1764-1767 he built an egg-shaped clock, containing a complex automatic mechanism. In 1769 Kulibin gifted this clock to Catherine II, who assigned Kulibin to be in charge of the mechanical workshop in the Academy of Sciences of Saint Petersburg. There, Kulibin built a "planetary" pocket-clock, which showed not only the current time, but also the month, day of the week, the season and the current moon phase. Kulibin also
kasutatakse kütuse etteande all erinevaid mootori koormust ja tingimusi ei saa enam tegeleda üha kasvav nõudlus tõhusust, heitkoguste, roolivõimendi, kesklukustus ja kütusekulu.Need nõudmised on nüüd peamiselt täitnud Electronic Diesel Control EDC on süsteem, mis pakub suuremat võimet täpse mõõtmise, andmetöötlus, töökeskkond paindlikkust ja analüüsi, et tagada tõhus diiselmootor operatsiooni. The EDC replaces the mechanical control governor with an electro-magnetic control device. EDC asendab mehaanilist kontrolli kuberner koos elektromagnetilise juhtseadmega. EDC on jagatud need peamised komponentide rühmade osas. · Electronic sensors for registering operating conditions and changes. Electronic andurid registreerimise käitamistingimuste ja muudatusi. A wide array of physical inputs is converted into electrical signal outputs. Mitmekesised füüsilise sisendite muundub
Variator A variator is a device that can change its parameters, or can change parameters of other devices. Often a variator is a mechanical power transmission device that can change its gear ratio continuously (rather than in steps). Kasutatud kirjandus: https://en.wikipedia.org/wiki/Variator
Spiderman Stan Lee created Spiderman in 1962. Spiderman is also known as Atomic Hero. A spider that has accidentally received a dose of radioactivity bit Peter Parker, a schoolboy, while attending a science exhibition. As a result, Peter acquires the agility and proportionate strength of an arachnid. He sews his own super hero uniform and uses his scientific knowledge to build mechanical devices that eject sticky webbing, but he is less interested in fighting crime than in making a buck.
The angular frequency is 2*pi()*n / 60 ja 2*pi()f The motor torque is equal to TL + J * oomega tuletis aja järgi The inductor supplies the motor with flux. The leading companies in the world market of electrical drive engineering are: Mitsubishi. The energy balance is described by energy conservation law. The armature supplies the motor with current. The cheapest and the most reliable is induction motor. The torque production is the result of interaction of current - flux. The mechanical torque as compared to the electromechanical torque is ?? The source of the magnetic flux of the motor is DC or permanent magnet. The most suitable for the speed control is synchronous servo motor. Efficiency of the electrical drive is the power ratio of load to supply. Electromagnetic efficiency is measured in tesla. One of the first eletrical motors has been built by Jacobi. The best electrical drive has efficiency very high. Who studied electromagnetic field
Famous people of England Quiz. nimi 2014 1. Name the English mathematician who devised a mechanical calculating machine in 1834 which was the forerunner of modem computers. 2. With what do you associate the names of Mary Read and Anne Bonny, who lived during the eighteenth .century? 3. She was an English heroine who, with her father rescued the crew of the ship Forfarshire which was wrecked on the Fame Islands on the northeast coast of England in 1838. Who was she? 4. What was Casanova's occupation at the time of his death? 5. What was the name of the Hunchback of Notre Dame 6
for selecting the speed limit is the service life of the ball bearings for the motor. 2.4 What should be done to decrease slippage? To decrease slippage, hard acceleration and overloading the motor should be avoided. 2.5 Calculate the drive resolution in the full-step mode According to the lab guide: ,,The distance the slide moves per mm positioning path (drive resolution) is equal to the ratio between the number of steps per revolution and the feed constant given in electrical and mechanical datasheet. ,, Using the datasheet values, the drive resolution in full-step mode is: 52/200= 0,26 mm/step.
● modern facilities and labs facilities ● Campus area: 53 ha faculties and colleges 8 faculties: 5 Colleges: ● Civil engineering ● Kuressaare ● Chemical and Materials Technology ● Tartu ● Social Sciences ● Tallinn ● Information Technology ● Virumaa ● Mechanical Engineering ● Estonian Maritime Academy ● Power Engineering ● Faculty of Science ● Tallinn School of Economics and Business Administration what are the requirements to get in ● bachelor's and engineering studies will normally take the state exams and / or on the basis of tests ● Applied higher education to apply for the required minimum average grade of secondary education diplomas 3.5
MY DREAM CAR My dream car is Nissan GT-R (R-35) 2010-2011 because of its design and mechanical abilities. It is full of todays best technology and because of that its one of the fastest cars on the market right now. I like the GT-R because of its price too, it costs about 59422 or 900 000 kr. GT-R is fast and good looking and has 4 seats and big boot ,so you can use then GT-R for everyday ride like taking your kids to school. It is very comfortable and you have many settings to choose from like automatic transmission ,soft supension and more stuff. In estonia you shouldnt have any trouble with snow because GT-R has all wheel drive what is very smart. GT-R has V6 VR38DETT engine and has 360 kW. And acclerates 0-97km/h in 3.2 seconds . It has one of best times in nürburgring 7:34 ,same time has Koenigsegg and better times has Porsche Carrera GT,Gumbert Apollo,Pagandi Zonda F and Porsche 997 GT2. I was sad ...
) duty Obligatory (adj.) mandatory; compulsory To be allowed to (v.) to be permitted to To be required to (v.) to be obligated to; to have to Athlete (n.) sports(wo)man Archery (n.) sport in which arrows are shot at a target with a bow To be keen on (v.) to like something To be good at (v.) to be successful at Trophy (n.) something material one receives for winning To ought to (v.) should Inevitable (adj.) unable to be avoided; sure to happen Gadget (n.) a mechanical device Economic (adj.) business-related; financial Economical (adj.) conservative with resources To beat somebody (v.) to defeat Achievement (n.) accomplishment To achieve (v.) to accomplish Breath (n.) the air inhaled and exhaled in respiration To breathe (v.) to respire Gradually (adv.) step by step Badminton (n.) a game including rackets, a net and a shuttlecock To affect (v.) to influence Effect (n.) result; outcome
8.1 Introduction · Electrofishing - use of electricity to: capture fish guide fish block the movement of fish Elektripüük öösel http://www.fisheries.org/units/education/fisheries_techniques/Chapter8/Night%20boat%20electrofishing %20unit.jpg Fish in an Electrical Field · Behavior change or reactive movement · Trauma from Stress due to physiology Injury due to mechanical tissue damage Fish in an Electric Field (cont.) · Low AC - fish lines up perpendicular to flux line · · - + · · · High AC - muscle contraction and tetany Injuries to Fish · Hemorrhages or bruising of soft tissue · Fractures of vertebrae · · · NOTE: AC is more likely to injure fish than pulsed DC Pulsed DC is more likely to injure fish than continuous DC 8.3 Electrofishing system
through Grendel's eyes, one gets a quite good picture of him. Unfortunately he is fighting with the inevitable. He keeps attacking and eating the Danish warriors simply because his instincts tell him to do so. He cannot help it; he is still a beast and not his own master. Beowulf undergoes as radical a transformation as Grendel does. The Beowulf of "Grendel" is uncannily superhuman. He is not only supremely strong, but also a cold, mechanical being. He is the only one who can make Grendel suffer physical pain. As the monster sees Beowulf as a terrible being himself and doesn't give him really any human qualities, he is definitely a flat character. Already on the first reading of Gardner's text it strikes out that he has exchanged the metaphors in "Beowulf" for similes, or at least most of them. E.g. "His hand still closed like a dragons jaw on mine" instead of "That the frame of his body failed him now..
Hooratta konstrueerimisel on enim oluline selle kompaktsus, vastupidavus ning maksimaalne kineetilise energia salvestamine. Komposiitmaterjalide kasutamine hooratastest tagab kiirema pöörlemise ning suurema energia salvestamise. Hooratas on energiatoiteühik, mis salvestab energiat mehaanilisel kujul. Hoorattad salvestavad kineetilist energiat pöörlevas kodaratega rootoris või kettas, mis on valmistatud komposiit-materjalidest. Hoorattaid kasutatakse autodes juba ammu, neid kasutatakse kõikides tänapäeva sisepõlemismootorites energia salvestamiseks ja võimsuse edastamise silumiseks mootori järskude pulsside korral. Hoorattaid kasutatakse erinevates süsteemides, kuna hooratas suudab edasi kasna energiat stabiilselt, samas kui energiaallikas ei väljasta energiat ühtlaselt. Sel põhimõttel toimivad hoorattad sisepõlemismootorites stabilisaatoritena. Kui tavalised hoorattad on tehtud terasest, alumiiniumist, siis uueks oluliseks suunaks hoora...
· What are the applications fields of cycloconverters rolling mills · What does a continuous current means non-pulsing · Call the difference of half-bridge and full-bridge dc/dc converters input/output voltage ratio · Why the transformer-isolated converters are used voltage set-up · Why the back diodes are required current reversing · In the steady state mode, the drive has pulsations ripples · In the very accurate drive, the over-speed is 1..10% · The mechanical time constant will be high if Td is low · The friction torque is passive · In the high-efficient electrical drives the overload capacity is high · The counter-torque of the hoist is active · The speed torque relation of a pump is quadratic · The source of the magnetic flux of the motor is permanent magnet · The energy balance is described by Energy conservation law · Which equations are correct P=sW · The angular frequency is 2n/60 2f · The motor torque is equal to P/ TL + Jd/dt
Thankfully there are a handful of techniques and strategies that will help a person achieve better results in acquiring knowledge. Firstly, it is important to make perfectly clear what is one´s motivation to learn is it a strive for a well-paid job, a place in a university or simply acknowledgement? Motivation is the key tool towards progress, it keeps you going when you experience failure or breakdown. Therefore it is like fuel to a car - a car might have all the functioning mechanical parts, but when it does not have fuel, it will not go very far. On the other hand, if a car has a tank filled with fuel, but lacks the crucial spare parts, it will not work well either. This is where study techniques come in, for example, learning styles. It is much easier to work or study if you are aware which style benefits you the most. For instance, my dominating learning style is auditory and knowing that has made me aware that I benefit more from studying
Sain teada, et harilik mänd on Eestis enimlevinud puuliik. Ta on väga vastupidav ning suudab kasvada erinevates kliimavöötmetes. Männi puidul on head mehhaanilised omadused ja seda saab kasutada mitmetes erinevates tööstustes. Männi puidu kvaliteet võib erineda isegi siis kui tegemist on ühe ja sama puuga. KASUTATUD KIRJANDUS 1. Mandre, M. (2000). State of Scots pine on a dune in South-West Estonia. – Metsanduslikud Uurimused XXXII, lk 91–97. 2. Pikk, M. (2004). Mechanical properties of Juvenile Wood of Scots Pine (Pinus sylvestris L.) Forest Site Type. Baltic Forestry X, lk 72-78. 3. Laas, E. (1987). Dendroloogia. Tallinn: Valgus. 824 lk. 4. Sibul, I. (2007-2010). Dendroloogia üldkursus. (Okaspuude lühikonspekt EMÜ AR, MH, LV, ME, MT ja ER eriala üliõpilastele). Eesti Maaülikooli metsandus- ja maaehitusinstituut. Tartu. 5. Teder, M. (2016). Eestis kasvab maailma kõrgeim mänd. –Postimees. [e-ajakiri] http://www.postimees
was produced in Estonia, but presently the share of imported product has fallen to 14.5%. Such change has been fostered by production methods that have quickly become more modern and more varied. Several producers hope to soon enter the EU market with their production. Part 2 Light industry yields a highly varied output from cotton fabrics to clothing and footwear. The fastest production growth can be witnessed in the enterprises of mechanical engineering and metalwork and chemical industries which give more added value. A widespread preconception, especially in Russia, holds that the Estonian economy depends largely on Russian transit. The reality is different -- freight traffic between Russia and the rest of the world is an important source of profit for Estonian ports but the role of transit in the Estonian economy has been consistently decreasing. Slightly more than 70%
Died May 11, 1927 (aged 40) Nationality Spanish Field Painting, Sculpture Movement Cubism José Victoriano González-Pérez (March 23, 1887 May 11, 1927), better known as Juan Gris, was a Spanish painter and sculptor who lived and worked in France most of his life. His works are closely connected to the emergence of an innovative artistic genre--Cubism, creating several of the movement's most distinctive works.[1] Biography Born in Madrid, he studied mechanical drawing at the Escuela de Artes y Manufacturas in Madrid from 1902 to 1904, during which time he contributed drawings to local periodicals. From 1904 to 1905 he studied painting with the academic artist José Maria Carbonero. It was probably in 1905 that José González adopted the more distinctive pseudonym Juan Gris.[2] In 1906 he moved to Paris and became friends with Henri Matisse, Georges Braque, Fernand Léger, and in 1915 he was painted by his friend, Amedeo Modigliani
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 4 on General Course of Electrical Drive INDUCTION MOTOR DRIVE (LUCAS-NÜLLE) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Nameplate data: Loading Machine SO3636- VDE 0530 IP:5 Is.KL: 6V 4 F U: 390V I: 4,4 A 4Nm/1.7k cos: W 4050 1/min f: 140 Hz Induction motor: SE2663-1K VDE 0530 IP: 20 Is.KL: F /Y U: 230/400V I: 1,7 / 1,0A Mot.DS 0,30 kW cos: 0.76 ...
and Greece, Estonia has managed to recover from the Chrisis quite well. The number of unemployed people has reduced, still many private companies have struggles due to the fact that the income of consumers has been low and the ability to consume products provided by the companies has suffered aswell. To develope business in Estonia, there is one option to set up here limited liability (piiratud) registered company. Business opportunities are: information technology, shared services, electronics, mechanical engineering, small craft building(väikelaevaehitus), logistics, wood, gaming industry etc. Estonia's main exports and imports are metals and chemical products, food products, textiles, wood and paper, machinery and equipment and furniture. Estonian Entrepreneurs, About 88 percent of the companies operating in Estonia, are tiny, and proovide bread for less than 10 people. SECOND: The economy and the job market (tööturg) is constantly changing. Therefore,
engine , v engine , flat engine , hot air engine , By length of strokes : short stroke engine , long-stroke engine Fiat 126 has engine on the back with rear wheel drive. Engine is 2 cylinder and it produces 652c.c Simca has engine on the front engine driving front wheels. Engine is four cylinder and it produces 1118 c,c Component check sequence : Electrical connections engine battery : elektriühendused motor /aku Pre-heating system Eelsoojenduse süsteem Engine mechanical condition Mootori mehaaniline olukord Air and fuel system õhu ja kütuse süsteem Fuel level in tank low kütuse tase on bensiinipaagis Condition of fuel/fuel filter / fuel pipes kütuse , filtrate ja torude korrasolek Air filter/intake system blockage : õhufiltri ja sisselaske süsteemi puhtus Access diagnostic trouble codes juurdepääs veakoodidele Glow plug control module süüteküünla korrasolek Engine coolant temperature (ECT) sensor jahutusvedeliku andur
trucks (lorries), buses, tractors, cars, yachts, compressors, pumps and small electrical generators. As of 2008, most high-speed engines have direct injection. Many modern engines, particularly in on-highway applications, have common rail direct injection, which is cleaner burning. 1.1.1.4) Medium-speed engines are used in large electrical generators, ship propulsion and mechanical drive applications such as large compressors or pumps. Medium speed diesel engines operate on either diesel fuel or heavy fuel oil by direct injection in the same manner as low-speed engines. 1.1.1.5) Also known as slow-speed, or traditionally oil engines, the largest diesel engines are primarily used to power ships, although there are a few land-based power generation units as well. These extremely large two-stroke engines have power outputs up to
Class 10b Supervisor: Meeli Lepisk Author: Brita Lodi Sir Isaac Newton 16431727 · 25 December 1642(4 January 1643, New Style) , in England · Died 20 March 1727 (aged 84) Sir Isaac Newton 16431727 He is the greatest and most influential scientist who ever lived · Physicist · Mathematican · Astronomer · Natural philosopher · Alchemist · Theologian Early life · He was more interested in making mechanical devices than in studying. · Sundial · Educated at The King's School, Grantham. · In June 1661, he was admitted to Trinity College, Cambridge As a students, we know him because.. · He was the first person who invent the 3 laws of motion · Theory of gravitation · Newtonian fluid, nonNewtonian fluid · Newton's theory of color · He invented the early telescope in 1671 Newtons laws in latin Newton's First Law
weeds • Improved unit cost of production • The possibility to use low-tilage systems Herbicide-tolerant crops Disadvantages • Danger of cross-pollination • Potential for developing herbicide- resistant weeds Non-chemical weed management • Crop rotation – creates an unstable environment for annual weeds • Crop establishment – when crops emerge first, it gives a competitive advantage over weeds that emerge later • Mechanical weed management – Removing by hand or using tools such as mowers and trimmers Conclusion • There are many ways to fight weeds, but the best way to get rid of weeds is to use herbicides. Still they must be used smartly, so your weeds don’t get resistant to herbicides. Thank you for listening! References • Robert E.L. Naylon. (2002). Weed management handbook. Blackwell Science
Transmission and differential Rene Põlluvee and Kaupo Kormik 43AT 2015 Transmission ● The transmission is a mechanical component designed to transmit power from a vehicle’s engine to the drive axle, which makes the wheels drive the vehicle.Some vehicles use a clutch to connect and disconnect the transmission to the engine, controlled through a foot pedal next to the brake pedal. These vehicles have a manual transmission. If your car doesn’t have a clutch pedal, it has an automatic transmission.Automatic transmissions depend on a special fluid called ATF to
6. Solutions to the problems 3.1 What signals SEC-AC and testbox exchange? SEC-AC and testbox exchange the following signals: TD-RD (Transmitted Data Received Data) DTR-DSR (Data Terminal Ready- Data Set Ready) RTS-CTS(Request to Send- Clear to Send) 3.2 Explain the needs in speed control and its problems Speed control is needed to achieve the requirements of the task of the motor, provide safety for the operator, ensuring optimal power usage and service life of the mechanical parts involved. Examples of problems in speed control: Designing a motor capable of the needed speed characteristics. The design of a reliable encoder, because some methods (like optical reading) may not work well at high speeds. Ensuring smooth acceleration and deceleration. Optimal usage of motor braking energy. 3.3 How can you change the speed By supplying the motor with more or less power. In this laboratry work: When manually controlling the motor with the testbox- by turning the
over the world had been working on transmitting pictures or objects onto a screen since the 1830’s, but the first physical television didn’t evolve until the 1900’s.In 1862 Abbe Giovanna Caselli invents his Pantelegraph and becomes the first person to transmit a still image over wires. Then in 1906 Lee de Forest built a vacuum tube that worked in the first mechanical working television. In 1940 Peter Goldmark invents the first color television with 343 lines of revolution. From when the first television was made by Lee de Forest, there has been many changes and improvements to it. After the TV was first invented, in 1936, coaxial cable was invented to transmit television signals. The first TV started out with black and white pictures until 1940 when the first color TV was built. Later on in 1948 cable became available to people that owned televisions. This
enemy. It was also a commodity: A forest was so many board feet of timber, a beaver colony so many pelts, a herd of buffalo so many robes and tongues. Even the Indians themselves were a resource - souls ripe for the Jesuit, Dominican, or Puritan plucking. It was the Europeans' cultural arrogance, coupled with their materialistic view of the land and its animal and plant beings, that the Indians found repellent. Europeans, in sum, were regarded as something mechanical - soulless creatures who wielded diabolically ingenious tools and weapons to accomplish mad ends. The Europeans brought with them not only a desire and will to conquer the new continent for all its material richness, but they also brought with them diseases that hit the Indians hard. Conflicts developed between the Native Americans and the Invaders, the latter arriving in overwhelming numbers, as many "as the stars in heaven". The Europeans were
olemusest ja kuidas seda luua. 2 1. VENNI DIAGRAMMI ÜLEVAADE 1.1. Ajalugu Nagu iga asi on saanud kusagilt alguse, nii on see ka Venni diagrammiga. Venni diagramm on saanud oma nime Briti loogiku ja filosoof John Venn´i käest, kes lõi selle 19. sajandi teisel poolel. Täpsemalt 1880. aastal John Venn populariseeris selle kasutamist oma raamatus pealkirjaga „On the Diagrammatic and Mechanical Representation of Propositions and Reasonings.” Kuid juba 13. sajandil kasutasid filosoofid ja matemaatikud sarnast diagrammi, nii võib oletada, et Venni diagramm on olemas olnud juba palju kauem. (A history…, 2013) Venni diagramm on sarnane Euler´i diagrammiga, mis loodi Leonhard Euleri poolt 18. sajandil. (The history…, 2013) Sellest võib järeldada, et paljud teadlased, filosoofid ja matemaatikud on sarnaseid diagramme kasutanud ka varemalt ning mida aeg edasi, seda
served in the Virginia legislature and the Continental Congress and was governor of Virginia. 6. The current constitution was adopted in 1788. The Constitution has been changed 26 times since 1789. 7. The main natrural resources in the United States of America are: oil shale, gold, coal, copper, iron, silver. 8. The agricultural products are: wheat, corn, soybeans, milk. The main industries in USA are textile, chemical, mechanical and electronics. 9. The legislative branch enacts legislation, confirms or rejects presidential appointments, and has the authority to declare war.The executive branch carries out and enforces laws.The judicial branch interprets the meaning of laws, applies laws to individual cases, and decides if laws violate the Constitution. 10. The first Americans lived in teepees and hunted buffalos. There were many different tribes and their food,
1. Pneumaatika ja hüdraulika alused e- kursus. Pneumaatilised täiturid. Pärnumaa Kutsehariduskeskus http://www.hariduskeskus.ee/opiobjektid/pneumaatika_ja_hudraulika_alused/? KURSUSE_TEEMAD:PNEUMAATIKA.:Pneumaatilised_t%E4iturid 2. Pneumaatika alused. Õpik. Koostanud Rein Uulma 3. Pneumaatiliste juhtimiskomponentide klassifikatsioon. E- õpe. http://www.eope.ee/download/euni_repository/file/1790/mehhatroonikaseadmed_ 31.05.2011.zip/Taiturid_11.html 4. Technological studies. Mechanical Systems. DET Technological Studies Support Materials http://www.educationscotland.gov.uk 5. Täiturmehhanismide olemus. E-õpe http://www.eope.ee/_download/euni_repository/file/1790/mehhatroonikaseadme d_31.05.2011.zip/Taiturid_1.html
The third step and the majority of starch hydrolysis takes place in small intestine where pancreatic alfa-amylase break the most bonds and creates new products. The fourth and last stepi s hydrolysing the remaining oligosaccharides by the brunch border enzymes of the intestine. The starch digestion in mammals and humans is very similar due to the build of the gastrointestinal tract and enzymes in that tract. Slide 5 The microstructure of natural foods influences how the chemical and mechanical food processing is carried out. Cells of the raw food generally rupture but cells in cooked food separate because therma processing destabilizes pectic material. The texture of food is influenced by parenchyma cell size, cell wall composition and thickness. The abudance of starch in cell and the shape and sizes of the granules is also important for the food texture. For example it is reported that in potatoes that have higher strach content and closely packed
Casing- High shock capacity ductile (nodular) iron. Consult Imo for steel case availability. Rotor Housing- Pearlitic gray iron for rotor sizes 106 through 187; bronze sizes 218 and larger. Power Rotor- Alloy steel, nitride hardened and thread ground Idler Rotors- Pearlitic gray iron, induction hardened and thread ground for sizes 106 through 187; alloy steel, nitride hardened and thread ground Gaskets- Cellulose and non-asbestos fiber Seal & Bearing- Type B: Buna N bellows mechanical seal, Buna N o-rings and standard external, permanently grease packed, deep groove ball bearing- recommended for distillate fuels and lubricating oil or hydraulic fluids. Type H: Laevamehaanika kateeder EESTI MEREAKADEEMIA Kursusetöö: Laeva abimehhanismid 14 Sergei Dombrovski MM42 Positive drive mechanical seal, fluoroelastomer o-rings and external high temperature, permanently grease packed, deep groove ball bearing.
Karina Korell 164498 MVEB 16.12.2017 Priit Põdra The structure consists of 2 members: steel wire rope 7x7 and a circular bar made of Aluminum alloy Al Mg4.5Mn0.7. The structure is loaded by the vertical force F that is acting at the joint, connecting these components. Calculate the minimum allowed diameter d of the aluminum bar and the maximum allowed value of the load F, assuming the relative position and mechanical properties of components (manufacturing tolerances, components' mass, possible stress concentration and buckling should be neglected). Wire rope nominal diameter is 10 mm and the strength is FLim = 58,3 kN. Yield strength of Aluminum alloy is 0,2 = 110 MPa. The value of design factor is [S] = 6. Required milestones: 1. Draw the sketch of the structure according to the values of A and B; 2. Derive the functions of both components internal forces as function of load F; 3
1 heaped teaspoon = 2.5 grams of coffee 1 rounded tablespoon = 7.5 grams of coffee 4-5 tablespoons of coffee for 1 pint of water * Water quality In a good cup of coffee approximately 98.5% of the beverage is water. Steep and Strain The simplest method of all. Hot water (just off the boil) is added to coarse to medium ground coffee in a container and the mixture left to ensure extraction (steeping). The coffee liquor is strained off or the steeping halted in some mechanical way prior to serving. This methods is best suited to domestic or light commercial use. Examples include the coffee jug, percolator, French Press, Ibrik Filter Infusion Medium to fine ground coffee are placed in a basket or container which is lined with a filter paper or other material designed to let the hot coffee liquor slowly filter through to a holding pot or container. Hot water is a added from above it steeps with the coffee grinds in the basket and falls through into
19th century: the cotton gin (1793), and his advocacy of interchangeable parts. In the South, the cotton gin revolutionized the way cotton was harvested and reinvigorated slavery. While in the North, the adoption of interchangeable parts revolutionized the manufacturing industry, and in time contributed greatly to their victory in the Civil War.[3] He died on January 8 , 1825 at the age of 59 The cotton gin is a mechanical device which removes the seeds from cotton, and it had been extremely labor-intensive. The cotton gin was a wooden drum stuck with hooks, which pulled the cotton fibers through a mesh. The cotton seeds would not fit through the mesh and fell outside. Whitney occasionally told a story where he was pondering an improved method of seeding the cotton and he was inspired by observing a cat attempting to pull a chicken through a fence, and could only pull through some of the feathers.
Wattist on koguni kirjutatud ka raamatuid : · Dickenson, H. W., James Watt: Craftsman and Engineer Cambridge University Press (1935). · H.W. Dickinson and Hugh Pembroke Vowles James Watt and the Industrial Revolution (published in 1943, new edition 1948 and reprinted in 1949. Also published in Spanish and Portuguese (1944) by the British Council) · J. P. Muirhead, Origin and Progress of the Mechanical Inventions of James Watt (London, 1854). · J. P. Muirhead, Life of Watt (London, 1858). · Samuel Smiles, Lives of the Engineers, (London, 1861-62, new edition, five volumes, 1905). · "Some Unpublished Letters of James Watt" in Journal of Institution of Mechanical Engineers (London, 1915). · Carnegie, Andrew, James Watt University Press of the Pacific (2001) (Reprinted from the
kütuse erikulu specific fuel(oil) consumption (SFOC, SFC) kütuse kulu fuel (oil) consumption laeva elektrijaam ships electrical powerplant laeva kiirus ships speed laevakütus marine fuel (oil) laevaseadmed ships gears laevasüsteemid ships piping systems masinaruum engine room mehaaniline ülekanne mechanical transmission mootorlaev motorship ökonoomne kiirus economical speed otseülekanne direct drive peajõuseade propulsion plant, propulsion machinery peaülekanne main transmission, main gear propulsiivseade propulsion unit puistlastilaev, balker bulk carrier, bulker puksiir tug, tug boat sõjalaev warship tanker tanker
The larger producers of beer are Saku and A'le Coq -- companies with traditions more than a hundred years long. Light industry yields a highly varied output from cotton fabrics to clothing and footwear. However, recent years have not been easy for the textile and sewing industry as it is increasingly difficult to compete with cheap producers from outside the European Union Estonian market is also being gradually flooded by cheap goods from China, India and Turkey. Mechanical engineering and motor vehicle industry have experienced a rapid development during the recent years, although the branch became nearly extinct in the early 1990s after the collapse of the Soviet military industry. The local business climate has been revived thanks to the opening of the plant of the international electronics company Elcoteq in 2000. Engineering products and equipment manufactured in Estonia range from cables,
1 1. Ainetöö ülesanne Antud ainetöö ülesandeks on kirjeldada tigureduktori tiguratast, teostada sellele tugevusarvutused, valida selle valmistamiseks sobivaim materjal ning valmistustehnoloogia koos viimistlusega. 2. Algandmed Tõstetav mass m = 350 kg Maksimaalne joonkiirus vmax = 0,7 m/s Ratta diameeter d = 0,2 m Teo keermekäikude arv z1 = 1 Tiguratta hammaste arv z2 = 41 2 3. Eskiis 3 4. Tiguülekande arvutus Teo läbimõõduteguri vähim lubatud väärtus qmin = 0,212*z2 = 0,212 * 41 = 8,69 Valime sobivatest väärtustest (8, 10, 12,5 ... ) qmin = 10 mm Ülekande moodul m=3 Teo ning tiguratta telgede reaalne vahe mm Teo keerme tõstenurk = 5,71 ° Teo jaotusläbimõõt d1 = qm = 10 * 3 = 30 mm Teo peadeläbimõõt da1 = d1 + 2m = 30 + 2 * 6 = 36 mm Tiguratta jaotusläbimõõt d2 = z2m = 41 * 3 = 124 mm Tiguratta peadeläbimõõt da2 = d2 + 2m = 124 + 2 * 3 = 130 mm Tiguratta jalgaderingjoone läbimõõt df2 = d2 2...
any medium-that is, of any extension of ourselves-result from the new scale that is introduced into our affairs by each extension of ourselves, or by any new technology. Thus, with automation, for example, the new patterns of human association tend to eliminate jobs, it is true. That is the negative result. Positively, automation creates roles for people, which is to say depth of involvement in their work and human association that our preceding mechanical technology had destroyed. Many people would be disposed to say that it was not the machine, but what one did with the machine, that was its meaning or message. In terms of the ways in which the machine altered our relations to one another and to ourselves, it mattered not in the least whether it turned out cornflakes or Cadillacs. The restructuring of human work and association was shaped by the technique of fragmentation that is the essence of machine technology
Metal recovery: 120% Redrying temperature: 350 °C, 2h Chemical composition, wt.% C Si Mn P S Cr Ni Min 0,30 1,6 0,6 Typical 0,07 0,60 1,80 0,01 0,01 0,8 Max 0,15 0,8 2,0 0,03 0,03 0,1 0,9 Mo Cu V Nb Min 0,25 Typical 0,4 Max 0,5 0,2 0,05 0,05 Mechanical properties Specified Typical PWHT Typical Yield strength, Re: 600 MPa* 730 MPa** 640 MPa Tensile Strength, Rm: >690 MPa* 770 MPa** 730 MPa Elongation, A5 >16% 21%** 23% Impact energy, CV: -40°C · 35 J -20°C · 100 J** -40°C · 40 J -40°C · 75 J** Product data Diam
Wilma A. Bainbridge. The Memorability of People: Intrinsic Memorability Across Transformations of a Person’s Face. Journal of Experimental Psychology: Learning, Memory, and Cognition. 2017, Vol. 43, nr. 5. Lk 706–716. Artikkel käsitleb uuringut kus juureldakse millisel määral püsib meeldejäämine stabiilne tundmatu inimese näo miimika ja vaatenurga muutusel. Peale esimest kohtumist jäävad teatud inimesed meelde terveks eluks, teistega võid kohtuda kordi ja kordi, kuid ikka on raskusi mäletamisega. Kui sa kohtuksid kahe inimesega jooniselt, siis on suur tõenäosus, et isik A jääks sulle meelde, kuid isiku B unustaksid. Joonis. Kõige paremini meelde jäänud isik (A) ja kõige vähem meelde jäänud isik (B) käesoleva referaadi aluseks olnud artikli uurimustöös. Pildid on lisatud inimeste nõusolekul Erinevad uuringud seovad mäletamist näo tajulise eristusvõimega ning näod mis kattuvad jälgija demograafilise sarnasuseg...
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