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The bulb is broken

CIRCUITS & ELECTRONICS P1

CIRCUITS & ELECTRONICS P1

TRANG 11 THE EASY WAY… _A _ _B _ Replace the bulb with a DISCRETE RESISTOR for the purpose of calculating the current.. TRANG 14 _R _ IS A LUMPED ELEMENT ABSTRACTION FOR THE BULB.[r]
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BÁO CÁO TOÁN HỌC   BIJECTIONS FOR HOOK PAIR IDENTITIES   POTX

BÁO CÁO TOÁN HỌC BIJECTIONS FOR HOOK PAIR IDENTITIES POTX

the rectangle (k n ) by R n,k . Under these assumptions, we form two skew diagrams, SR n,k (µ) and SR n,k ( µ). The skew diagram e SR n,k (µ) is formed by starting with the k × n rectangle R n,k , removing a copy of the partition µ from the top-left corner of R n,k , and then gluing a copy of µ to the right of R n,k so that the first row of this copy of µ is glued to the first row of R n,k . See Figure 2.b for an example with k = 6,
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BÁO CÁO SINH HỌC:

BÁO CÁO SINH HỌC: "MAKING THE JUMP: NEW INSIGHTS INTO THE MECHANISM OF TRANS-TRANSLATION" PDF

A Ab bssttrraacctt The transfer-messenger ribonucleoprotein (tmRNP), which is composed of RNA and a small protein, small protein B (SmpB), recycles ribosomes that are stalled on broken mRNAs lacking stop codons and tags the partially translated proteins for degradation. Although it is not yet understood how the ribosome gets from the 3’ end of the truncated message onto the messenger portion of the tmRNA to add the tag, a recent study in BMC Biology has shed some light on this astonishing feat.
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Coding the Arduino: Building Fun Programs, Games, and Electronic Projects

Coding the Arduino: Building Fun Programs, Games, and Electronic Projects

Because the LED and resistor are in a series circuit and the current loop is broken, no current will flow through the resistor to produce a voltage drop across it (remember Ohm’s Law)[r]
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PHÂN BIỆT NGHĨA CỦA TỪ 9 PDF

PHÂN BIỆT NGHĨA CỦA TỪ 9 PDF

heighth HEIGHTH HEIGHT “Width” has a TH at the end, so why doesn’t “height"? In fact it used to, but the standard pronunciation today ends in a plain “T” sound. People who use the obsolete form misspell it as well, so pronunciation is no guide. By the way, this is one of those pesky exceptions to the rule, "I before E except after C," but the vowels are seldom switched, perhaps because we see it printed on so many forms along with “age” and “weight."
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BÁO CÁO TOÁN HỌC   ON THE PROOF OF A THEOREM OF P´LFY A  DOC

BÁO CÁO TOÁN HỌC ON THE PROOF OF A THEOREM OF P´LFY A DOC

We will not simplify all of P´alfy’s proof, so it will be worthwhile to discuss exactly which part of his proof we will simplify. First, we will not deal with groups G such that | G | = 4 at all. Second, we will only be concerned with showing that if gcd( n, ϕ ( n )) = 1, then Z n is a CI-group. Third, P´alfy’s original proof can be broken into two cases, with the first dealing with the case where h ( Z n)L , γ − 1 ( Z n)L γ i is doubly-transitive and the second dealing with the case where h ( Z n)L , γ − 1 ( Z n)L γ i is imprimitive (note that as Z n is a Burnside group [3, Theorem 3.5A] for n composite, these are the only nontrivial cases). The doubly-transitive case was reduced by P´alfy to the imprimitive case using the fact that all doubly-transitive groups are known [2], which is a consequence of the Classification of the Finite Simple Groups. We shall do the same, using P´alfy’s argument. P´alfy handled the imprimitive case by using a sequence of lemmas (Lemmas 1.1-1.4 in [6]) which, while not overly difficult, do involve some tedious calculations and do not seem to make transparent why the condition gcd( n, ϕ ( n )) = 1 is crucial. We shall show that Lemma’s 1.2-1.4 of [6] can more or less be replaced by an application of Philip Hall’s generalization of the Sylow Theorems for solvable groups.
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DESIGNING FOR THE SOCIAL WEBJ PHẦN 9 DOCX

DESIGNING FOR THE SOCIAL WEBJ PHẦN 9 DOCX

ptg Figure 7.6 The New York Times places their call to action appropriately close. Contrast the New York Times layout with Wired magazine’s, which places the sharing tools farther up on the right of the page. These are not easily seen in the normal flow of reading, as they are above the hori- zontal line created when someone starts reading the article. (I actually looked around for a while before I found them here, as their position in the right column separates them unexpectedly.) Unless readers are proactively looking for them, they may not see them.
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Báo cáo hóa học:

Báo cáo hóa học: " Research Article A Fault Diagnosis Approach for Gears Based on IMF AR Model and SVM" pot

approach based on IMF AR model and SVM can be applied to classify the gear working conditions and fault patterns e ff ectively and accurately even in case of smaller number of samples, which accordingly o ff ers a new approach for the fault diagnosis of gears. However, because it would take more time to determine the parameters of SVM classifier and the AR model, the proposed method cannot be available in real- time. In addition, what is necessary to point out is that the SVM theory is still in its perfecting phase, for example, the problems of kernel functions selection in di ff erent condition and so on are still needed to research further.
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Lop9Tuan23tiet44 unit 7 readHien

Lop9Tuan23tiet44 unit 7 readHien

For most North American households, lighting accounts for 10 percent to 15 percent of the electricity bill. However, this amount can be reduced by replacing and ordinary 100 – watt light bulb with an energy – saving bulb. These bulbs use a quarter of the electricity of standard bulbs and last eight times longer. Therefore consumers can save about US$7 to US$21 per bulb.
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HOW TO HEAL A BROKEN HEART OUTLINE PPS

HOW TO HEAL A BROKEN HEART OUTLINE PPS

2. sharing your feeling with others will help you relieve the pain. 2.1You should share you feeling with your close relative and friends because they are always willing to listen what you say and help you find out the solution. 2.2 If you really decline, you cannot get over the pain, if you can’t find out the way out for your heart , let see the psychological experts or doctors. They know how to help you overcome your circumstance quickies.
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LUYỆN ĐỌC TIẾNG ANH QUA CÁC TÁC PHẨM VĂN HỌC –MOBY DICK HERMAN MELVILLE CHAPTER 104 POT

LUYỆN ĐỌC TIẾNG ANH QUA CÁC TÁC PHẨM VĂN HỌC –MOBY DICK HERMAN MELVILLE CHAPTER 104 POT

Rocks that shoot two Miles into the Sea, and wound the Whales when they light upon 'em. They keep a Whale's Rib of an incredible length for a Miracle, which lying upon the Ground with its convex part uppermost, makes an Arch, the Head of which cannot be reached by a Man upon a Camel's Back. This Rib (says John Leo) is said to have layn there a hundred Years before I saw it. Their
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MOLECULAR BIOLOGY PROBLEM SOLVER 8 POTX

MOLECULAR BIOLOGY PROBLEM SOLVER 8 POTX

Once you have decided if an air or positive displacement pipette is the right choice for your lab, then the next thing to choose is the proper volume range. Determine what will be the most frequently used volume. This will then help you to decide on the style of pipette that will achieve the best accuracy. Fixed-volume pipettes provide the highest accuracy of manual pipettes, but they are limited to one volume. Adjustable-volume pipettes are slightly less accurate, but they allow for the pipetting of multiple volumes with one pipette. For example, an Eppendorf ®
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adobe dreamweaver cs5 on demand part 73 ppt

adobe dreamweaver cs5 on demand part 73 ppt

Introduction Testing is an integral part of the design of a Web site. In fact, the term used to describe a good Web site is bullet proof. Without the ability to test a site, you would never know what works, and what needs help. Dreamweaver gives you a host of tools to help make sure that your visitors have a pleasant experience. Some of the things Web testing can and should look for are:
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Câu hỏi ôn tập Tiếng Anh 9

Câu hỏi ôn tập Tiếng Anh 9

In order to save electricity, an ordinary 100 watt light bulb can be replaced by ……... an energy saving bulb D.[r]
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DESIGNATION: C 349 – 97 - COMPRESSIVE STRENGTH OF HYDRAULIC-CEMENT MORTARS PPT

DESIGNATION: C 349 – 97 - COMPRESSIVE STRENGTH OF HYDRAULIC-CEMENT MORTARS PPT

(Note 1). Center the pedestal usually provided for breaking 50 by 100-mm (2 by 4-in.) cylinders on the base bearing block of the machine, and center the bearing plate assembly on top of this pedestal. If the testing machine has no provisions for automatic accurate centering of a pedestal exactly below the center of its upper spherical bearing head, a hardened steel cylinder of suitable diameter and height and with parallel plane end faces may be used, provided that the bearing plate assembly is centered accurately below the center of the upper bearing head after the specimen has been placed in proper position in the bearing plate assembly. Apply the specimen aligning guide to the outside of one of the aligning plates of the bearing plate assembly, with the lugs at each end resting on or slightly above the edge of the bearing face of the bottom plate. Turn the specimen on its side with respect to its position as molded and place it in the device with the bottom as molded in contact with the aligning lugs, holding the aligning guide against the aligning plate firmly with one hand. Then remove the aligning guide without disturbing the position of the specimen and apply the load in accordance with the Procedure section of Test Method C 109/C 109M. The testing of the broken portions as modified cubes shall follow breaking in flexure within 10 min for 24-h specimens and within 30 min for all other specimens.
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KIỂM TRA ANH VĂN LẦN 4 PPTX

KIỂM TRA ANH VĂN LẦN 4 PPTX

14. I think the prices here are _____. a. reasoning b. unreasonable c. reasonably d. reasoned 15. His parents have great _____ for his future. a. expecting b. expectant c. expectantly d. expectation 16. It cannot be inferred _____ the apparent ease of the transition that all is well.
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GRAMMAR LỚP 10 TĐ UNIT 1-10

GRAMMAR LỚP 10 TĐ UNIT 1-10

Đại từ quan hệ “whose” được dùng để thay thế cho tính từ sở hữu chỉ người, đứng trước một danh từ khác để làm chủ ngữ hoặc tân ngữ trong câu. eg: The woman whose car has been broken is M[r]
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LEVEL A LESSON 15 POTX

LEVEL A LESSON 15 POTX

- I’m afraid I’ve broken your umbrella.. There is one TV programme which is above all ________ in popularity.[r]
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Minimizing mother bulb requirement through mechanical option: A cost friendly approach of onion seed production

Minimizing mother bulb requirement through mechanical option: A cost friendly approach of onion seed production

Reduction of seed production cost of onion in India may play an important role in bridging the demand-supply gap of onion bulb in both domestic as well as international market, but choices to be made require appropriate cultural manipulations to reduce the mother bulb requirement, the key cost component of seed production. A field experiment in West Bengal, India was conducted between 2014-15 to 2016-17 on a clay loam (Alfisol) soil to evaluate seed production using five different portions of mother bulb (whole bulb of 70- 80g; cross section cut at middle of 40-50g; longitudinally half cut of 35-40 g; longitudinally one third cut of 30-35 g and small but whole bulb of 30-35g) of Sukhsagar variety.
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ÔN THI ANH VĂN CUỐI KỲ I NĂM 2011 – ĐỀ 009 PPT

ÔN THI ANH VĂN CUỐI KỲ I NĂM 2011 – ĐỀ 009 PPT

5. We regret _________ you that you have exceeded your overdraft facility. A. to inform B. informing C. to tell to D. telling 6. Why don’t you try _________ the key anti-clockwise? A. to turn B. on turning C. turning D. turn 7. We don’t allow _________ in the classrooms.
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60 CÂU HỎI TRẮC NGHIỆM TIẾNG ANH PHẦN 3 PPSX

60 CÂU HỎI TRẮC NGHIỆM TIẾNG ANH PHẦN 3 PPSX

Characteristics of Glass 8 People commonly think of glass only as windowpanes or drinking glasses. However, glass can come in a multitude of colors. In fact, glass objects can be found in almost any color. The structure of glass also varies greatly. Glass can be spun finer than a spiderweb or molded into a telescope lens that is as heavy as four elephants.
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TRAININGTHETRAINERS UK BIOCHEMISTRY FUNDAMENTALS

TRAININGTHETRAINERS UK BIOCHEMISTRY FUNDAMENTALS

• THERE IS A LIMITED NUMBER OF SUBSTRATES THAT THE “METHANOGENS” CAN USE TO PRODUCE TRANG 5 THE STAGES IN ANAEROBIC DIGESTION • HYDROLYSIS – Long chain polymers broken down to smaller mo[r]
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TEST FOR UNIT 5

TEST FOR UNIT 5

6. What makes computer a miraculous device? a. strange b. powerful c. magical d. excellent 7. The encyclopedia is now available on ................. a. computer screen b. CD-ROM c. keyboard d printer 4. Please .............. your phone card in the slot before pressing the number you require.
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ANOTHER WORD A DAY PART 8 DOCX

ANOTHER WORD A DAY PART 8 DOCX

I remember the day I caught my first, and last, fish. I was in college. During the winter break, a friend invited me to visit him. With makeshift fishing rods in our hands we went to the dam near his house. I sat there uneasily, holding the rod with the line dipped in the still water of the reservoir. A while later there was a tug and I promptly handed over the rod to my friend. He pulled the line in. There was a small orange fish on the end. It was alive, wildly flailing at its sudden change of fortune. With a promise of food I had tricked it out of its life.
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PROCESS ENGINEERING EQUIPMENT HANDBOOK EPISODE 2 PART 7 PDF

PROCESS ENGINEERING EQUIPMENT HANDBOOK EPISODE 2 PART 7 PDF

intimate contact with the well and to have the exposed parts of the well as small as possible and insulated from their surroundings. The nature of heat transfer between the medium, the temperature of which is being measured, and the sensing element and the sources of temperature errors due to conduction, radiation, and aerodynamic heating are described below. The temperature-sensing element indicates its own temperature, which may not be the exact temperature of the fluid in which it is inserted. The indicated temperature is established as a result of heat-flow equilibrium of convective heat transfer between the sensing element and the fluid on one side and heat flow through conduction and radiation between the element and its surroundings on the other side. This applies closely to fluids at rest or to fluids moving with low velocities. The conditions are more complex for fluids moving at higher velocities (corresponding to a Mach number greater than 0.3), in which the aerodynamic heating effect plays a greater part in heat balance.
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Tài liệu về danh từ, đại từ và mạo từ  (11)

Tài liệu về danh từ, đại từ và mạo từ (11)

A. x B. a C. an D. the 4. _____ Queen Elizabeth had dinner with ____ President Kennedy. A. The... the B. The...x C. x.....x D. x... the 5. If you want to buy some new clothes, the store I would recommend is _____. A. Jack‟s B. the Jack‟s C. a Jack‟s D. Jack 6. _____ is an important museum in Washington
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TẬP HỢP ĐỀ THI TUYỂN SINH LỚP 10 MÔN TIẾNG ANH  CÓ ĐÁP ÁN

TẬP HỢP ĐỀ THI TUYỂN SINH LỚP 10 MÔN TIẾNG ANH CÓ ĐÁP ÁN

20. Giang’s going to be there for 3 months. ............. 21. Peter and Giang are both in primary school. ............. 22. Giang is having a good time learning and working with the Parkers. ............. V. Use the correct form of the word given in each sentence (1.5 pts) 23. Teenagers are now ......................... dressed. (fashion) 24. Like beverage cans and bottles, this ............... can be recycled. (produce) 25. Mr. Brown felt .................. that people have spoiled that area. (disappoint) 26. It is still a bit .............. to use the Internet in everyday life. (cost) 27. Despite the ............. weather, thousands of soldiers helped protect the area. (storm) 28. My friend Tuan has been nominated as one of the most effective ........ in the town charity program. (active) VI. Use the correct tense or form of the verb given in each sentence (1 pt) 29. If you .............. working, you would be behind others. (stop) 30. At that time, two boys who ........... to a test site stopped and took the injured woman to the nearest hospital. (go) 31. Mary has some difficulty ............ up early in the morning. (get) 32. Mr. Henrique Calisto ............... in Vietnam for eight years now. (work) VII. Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it (2 pts) 33. Ba said to Tung, “Would you like a cup of tea?”  Ba offered ........................................................................................................
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BÁO CÁO Y HỌC    RESEARCH HOW IS THE BALANCE BETWEEN PROTEIN SYNTHESIS AND DEGRADATION ACHIEVED  PPT

BÁO CÁO Y HỌC RESEARCH HOW IS THE BALANCE BETWEEN PROTEIN SYNTHESIS AND DEGRADATION ACHIEVED PPT

Lysosomal degradation According to one line of current thinking, there are two general mechanisms for the deg- radation of proteins in eukaryotic cells, one for cytosolic and nuclear proteins, and another for proteins that are contained in or are part of large intracellular structures (excepting the nucleus), such as various membrane-enclosed vesicles and organelles. For cytosolic and nuclear proteins, breakdown occurs within proteasomes, small freestand- ing pore-like aggregates of degradative enzymes and regulatory proteins found in the cytosol and nucleoplasm [5-10]. It is thought that dysfunctional structural changes occur to protein molecules over time due to random environmental causes, or as a result of being defective initially, and that as a consequence certain exposed regions on the altered molecules serve as the predicate for their degradation. For at least some, a small protein, ubiquitin, affixes to particular imperfections and marks them for destruction [11-16]. In the other degradative system, entire anatomical structures enter small membrane- enclosed sacs known as lysosomes as the result of membrane fusion [17-19]. Subsequent to fusion, lysosomal enzymes disassemble and degrade the structure and its contents, including its proteins.
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Unit 10. Recycling. Lesson 6. Language Focus

Unit 10. Recycling. Lesson 6. Language Focus

b) Then wash the glass with a detergent liquid.. a) The glass is broken into small pieces... b) Then the glass is washed with a detergent liquid..[r]
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PROCESS ENGINEERING EQUIPMENT HANDBOOK 2009 PART 11 PPT

PROCESS ENGINEERING EQUIPMENT HANDBOOK 2009 PART 11 PPT

this case, the transfer is from users of CFCs to producers. Economic costs exclude transfers and in this way focus on the additional real resource costs associated with the regulation. In this way of assessing costs, there are no incremental costs associated with firms that continue to use CFCs, with no change in their production process. They may pay higher CFC prices but this is not a real resource cost to society. The clearest example of costs is the case in which the firm switches to a new HCFC or HFC refrigerant. The refrigerant itself may be more expensive and it may also involve system or process changes. If there are capital costs, these must be amortized over the life of the equipment and in this way, these costs are divided among a range of current and future end users. This means that firms that convert away from CFCs will have incremental costs that must be measured. Other firms may try to reduce
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HACKER PROFESSIONAL EBOOK PART 194 PPS

HACKER PROFESSIONAL EBOOK PART 194 PPS

Although hash functions in general have many uses in computer programs, in cryptography they are used to generate a small string (the message digest) that can represent securely a much larger string, such as a file or message. Since the hash functions are faster than the signing functions, it is much more efficient to compute a digital signature using a document's message digest, which is small, than using the arbitrarily large document itself. Additionally, a digest can be made public without revealing the contents of the document from which it derives. This is important in digital
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SCIENTIFIC AMERICAN  SPECIAL ONLINE ISSUE     2003 NO 05     TACKLING MAJOR KILLERS     HEART DISEASE

SCIENTIFIC AMERICAN SPECIAL ONLINE ISSUE 2003 NO 05 TACKLING MAJOR KILLERS HEART DISEASE

T he permanent replacement of a failing human heart with an implanted mechanical device has long been one of medicine’s most elusive goals. Last year this quest en- tered a crucial new phase as doctors at several U.S. hospitals be- gan the initial clinical trials of a grapefruit-size plastic-and-tita- nium machine called the AbioCor. Developed by Abiomed, a company based in Danvers, Mass., the AbioCor is the first re- placement heart to be completely enclosed within a patient’s body. Earlier devices such as the Jarvik-7, which gained world- wide notoriety in the 1980s, awkwardly tethered patients to an air compressor. In contrast, the AbioCor does not require tubes or wires piercing the skin. In July 2001 Robert L. Tools, a 59- year-old former Marine whose heart had become too weak to pump effectively, became the first recipient of this artificial heart. Over the next nine months, surgeons replaced the failing hearts of six more patients with the AbioCor. But the initial tri- als have had mixed results. As of press time, five of the seven pa- tients had died: two within a day of the implantation procedure, one within two months, and two within five months. (Tools died last November.) One of the two survivors has lived for more than eight months with the device, the other for more than six months. Because all the patients were seriously ill to begin with —
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dien tich bay trong tu truong deu

dien tich bay trong tu truong deu

Beta oxidation is the process by which fatty acids, in the form of Acyl-CoA molecules, are broken down in mitochondria and/or in peroxisomes to generate Acetyl-CoA, the entry molecule [r]
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Báo cáo hóa học:

Báo cáo hóa học: " Research Article Multisource Images Analysis Using Collaborative Clustering" potx

only they are unified by a voting method, or a clustering as in method (b). To integrate this new approach in our system, we a ff ect one dataset to each clustering method. All the process of results refinement stay unchanged, but we are confronted with the problem of the comparison of the different results, and precisely of the estimation of the intercluster similarity (see Section 3.1). In the two first cases presented above (same elements with different descriptions), the confusion matrix and the intercluster similarity defined in Section 3 can be used. However, in the third case (different elements with different descriptions), it cannot be applied because the computation of a confusion matrix between two clusterings involves that the clusters refer to the same objects. The definition of a confusion matrix between datasets of di ff erent objects is in the general case very hard, or even impossible. Nevertheless, in some particular problems, it is possible to define it. In the next section, we describe how this matrix can be evaluated in the domain of multiscale remote sensing images clustering.
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5 15 the light bulb (physical science)

5 15 the light bulb (physical science)

Benjamin Franklin, a famous American inventor, discovered that lightning is actually electricity. In 1752, he performed a famous experiment by fl ying a kite in a lightning storm. He tied a key to the kite string near the end he was holding. When Franklin saw a spark jump from the key to his fi nger, he knew that the sky was full of electrical charges. This experiment was very dangerous. If the kite had been struck by lightning, Franklin could have been killed.
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Evaluation of seed setting aggregatum onion (Allium cepa var. aggregatum) types under Tamil Nadu conditions

Evaluation of seed setting aggregatum onion (Allium cepa var. aggregatum) types under Tamil Nadu conditions

Multiplier onion or Aggregatum onion (Allium cepa var. aggregatum) is one of the important bulbous vegetable cultivated in India. Onion is mainly propagated through bulbs and approximately 1000 kg of bulb is required for planting in one hectare of area. Huge quantities of onion bulbs are wasted for propagation purpose. By switching over from bulb propagation method to seed, there is a saving of seed bulb to a tune of 1000 kg/ha. As Aggregatum onion is being cultivated in 30,000 hectares in Tamil Nadu, a saving of 30,000 tonnes bulbs could be obtained. In addition to this, the bulbs must be bolder in size with attractive pink in colour for consumer attraction. Considering the bottlenecks, breeding programme was initiated to develop a seed setting onion type with attractive pink coloured bulbs to meet the demands of domestic and export markets.
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Design, fabrication, and testing of a movable solar operated sprayer for farming operation

Design, fabrication, and testing of a movable solar operated sprayer for farming operation

The results obtained show that solar sprayer was effective and will be useful in rural areas where there is no constant power supply. The system is incorporated with an energy bulb and charging kit to light up the farmyard and for the operator to charge his/her phone.
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PRACTICAL TCP IP AND ETHERNET NETWORKING  P28 DOC

PRACTICAL TCP IP AND ETHERNET NETWORKING P28 DOC

The main application where these satellite systems can be useful for is in providing high-bandwidth access to places where the landline system doesn’t provide this type of infrastructure. But the greatest challenge with satellite systems is the time it takes for your data to get from the one point to the other. A possible solution to reduce this latency is the use of low earth orbit (LEO) satellites. However, the problems with LEOs are the need to provide a large number to get the relevant coverage of the earth’s surface. In partnership with Boeing, Teledisc is targeting the provision of 288 LEO satellites. A further practical problem with LEO satellites is they only last 10 to 12 years before they burn up in falling to earth through the atmosphere. GEOs don’t have this particular problem as they are merely ‘parked’ a lot higher up and left. A further challenge with Leo’s is tracking these swiftly moving satellites, as they are only visible for up to 30 minutes before passing over the horizon. A phased-array antenna comprising a multitude of smaller antennas solves this antenna problem by tracking several different satellites simultaneously with different signals from each satellite. At least two satellites are kept in view at all times and the antenna initiates a link to a new one before it breaks the existing connection to the satellite moving to the bottom of the horizon.
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PRACTICAL TCP IP AND ETHERNET NETWORKING  P55 DOCX

PRACTICAL TCP IP AND ETHERNET NETWORKING P55 DOCX

The main application where these satellite systems can be useful for is in providing high-bandwidth access to places where the landline system doesn’t provide this type of infrastructure. But the greatest challenge with satellite systems is the time it takes for your data to get from the one point to the other. A possible solution to reduce this latency is the use of low earth orbit (LEO) satellites. However, the problems with LEOs are the need to provide a large number to get the relevant coverage of the earth’s surface. In partnership with Boeing, Teledisc is targeting the provision of 288 LEO satellites. A further practical problem with LEO satellites is they only last 10 to 12 years before they burn up in falling to earth through the atmosphere. GEOs don’t have this particular problem as they are merely ‘parked’ a lot higher up and left. A further challenge with Leo’s is tracking these swiftly moving satellites, as they are only visible for up to 30 minutes before passing over the horizon. A phased-array antenna comprising a multitude of smaller antennas solves this antenna problem by tracking several different satellites simultaneously with different signals from each satellite. At least two satellites are kept in view at all times and the antenna initiates a link to a new one before it breaks the existing connection to the satellite moving to the bottom of the horizon.
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