Basic physical principles

Part 1 book “Ultrasound in obstetrics and gynecology - A practical approach” has contents: Basic physical principles of medical ultrasound, basic characteristics of the ultrasound equipment, technical aspects of the ultrasound examination, ultrasound in the first trimester, ultrasound in the second trimester,… and other contents.

152p tieu_vu13 06-08-2018 0 0   Download

The world faces serious difficulties in obtaining the energy that will be needed in coming decades for a growing population, especially given the problem of climate change caused by fossil fuel use. This book presents a view of nuclear energy as an important carbon-free energy option. It discusses the nuclear fuel cycle, the types of reactors used today and proposed for the future, nuclear waste disposal, reactor accidents and reactor safety, nuclear weapon proliferation, and the cost of electric power.

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Magnetism often has a slight overtone of being mysterious. This is probably caused by the surprisingly strong forces between magnets which everybody can experience with magnetic toys, magnet boards, or similar objects. A strange effect is the unique ability of magnetic fields to penetrate many substances without any attenuation. Though the physical basis of magnetism is well explored, the outsider usually does not know very much about the details and sometimes tends to overestimate the real possibilities provided by magnetism.

656p chuyenphimbuon 21-07-2012 27 9   Download

Simple Physics Simple Physics In the quest for more expressive animation, you will find that adding physics to animations, games, and similar projects can really elevate them to another level of user enjoyment. The visual appearance and, in interactive scenarios, even the user experience of a project are sometimes dramatically enhanced by surprisingly small code additions. We’re going to be discussing some basic physics principles in this section, but it’s more important for you to understand their effects than to focus minutely on the math and science behind them.

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Ancient Hebrew and Christian tradition relates that the universe was created in six days, following which there was a day of rest. What the old chronicles never recorded was that, on the eighth day, the Creator must have dropped back into the lab to do some tidying up. Only then, coming across his rough notes for Maxwell’s and the acoustic wave equations, did the thought occur that the creation of light and sound could be logically extrapolated to x-rays and ultrasound.

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LIFE ON EARTH ULTIMATELY DEPENDS ON ENERGY derived from the sun. Photosynthesis is the only process of biological importance that can harvest this energy. In addition, a large fraction of the planet’s energy resources results from photosynthetic activity in either recent or ancient times (fossil fuels). This chapter introduces the basic physical principles that underlie photosynthetic energy storage and the current understanding of the structure and function of the photosynthetic apparatus (Blankenship 2002). The term photosynthesis means literally “synthesis using light.

36p anhphuonggl 11-04-2013 42 9   Download

In Sweden, a large­scale experiment with the 'supportive' variant 16  was held. When the driver exceeds local speed  limits, the gas pedal would resist with more pressure. However, the driver could overrule ISA by pressing down the gas  pedal with more power. The experiment showed a decrease in speed, and a decrease in travelling time. The users  reported they were driving safer (or at least feeling so) and smoother.

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(BQ) Part 1 book "Palpation techniques surface anatomy for physical therapists" presents the following contents: Basic principles, shoulder complex, elbow complex, hand, hip and groin region, knee joint, foot.

198p thangnamvoiva3 01-07-2016 16 3   Download

Techniques for non-invasive Breslow determination use either mechanical or electromagnetic waves. A wave is the propagation of a perturbation inducing reversible variations of local physical properties. It transports energy but no matter. Ultrasounds and optical waves are used mainly because of their innocuousness. In the next paragraphs, ultrasonography then several optical techniques will be developed. Basic physical principles of each type of wave interaction with skin will be described then accuracy of Breslow index determination by such techniques will be given.

186p ti_du_hoang 15-08-2012 30 2   Download

An equation is a statement of equality: Whatever is on the left-hand side of any equation is equal to whatever is on the right-hand side. The symbols in an algebraic equation usually cannot have arbitrary values if the equality is to hold. To solve an equation is to find the possible values of these symbols. The solution of the equation 5x − 10 = 20 is x = 6 because this is the only value of x for which this equation is a true statement. The algebraic procedures that can be used to solve an equation are all based on the principle that any operation...

480p bachduong1311 10-12-2012 32 0   Download

Wireless Sensor Networks (WSNs) can be defined as a self-configured and infrastructure-less wireless networks to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a main location or sink where the data can be observed and analysed. A sink or base station acts likean interface between users and the network. One can retrieve required information from the network by injecting queries and gathering results from the sink.

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Basic principles and objectives of supercharging Since the radial compressor will be discussed in detail in Chap. 5 in connection with exhaust gas turbocharging and as part of the exhaust gas turbocharger, at this point its function will only be addressed as the basis for its map characteristics. All flow compressors are based on the physical principle of the transformation of kinetic energy, which is supplied to the medium in the impeller, into a pressure rise via flow deceleration, partially in the impeller, partially in a diffuser.

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There is a basic law in thermodynamics; the law of conservation of energy, which states that energy may neither be created nor destroyed just can be transformed. Nature is an expert using this physics fundamental law favouring life and evolution of species all around the planet, it can be said that we are accustomed to live under this law that we do not pay attention to its existence and how it influence our lives.

262p nhatkyvodanh 05-09-2012 46 7   Download

In recent years, the awareness of water needs and processing requirement has become an increasingly important topic. As the earth's population increases the demand for "clean" water has become an even larger factor in residential as well as industrial and commercial costs. There are now almost no natural water sources that do not require some purific

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In response to requests from Congress, NASA asked the National Research Council to undertake a decadal survey of life and physical sciences in microgravity. Developed in consultation with members of the life and physical sciences communities, the guiding principle for the study is to set an agenda for research for the next decade that will allow the use of the space environment to solve complex problems in life and physical sciences so as to deliver both new knowledge and practical benefits for humankind as we become a spacefaring people.

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The values indicated are mean values drawn from the literature. It should be noted that organ dimensions may vary substantially from one individual to the next. Generally the values are not correlated with age, height, or constitution and therefore should be treated as guidelines. Vascular dimensions refer to inside diameters.

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Microbubble-based contrast agents for ultrasound were introduced some time ago, although their clinical application has become widespread only in recent years. Since color and power Doppler reveal overt artifacts after microbubble injection due to the peculiar features of harmonic signals produced by insonation of microbubbles, dedicated contrast-specifi c modes of US were introduced to optimize the registration of such signals.

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The paper provides an elementary derivation of new superluminal spatio-temporal transformations based on the idea that, conceptually and kinematically, each subluminal, luminal and/or superluminal inertial reference frame has, in addition to its relative velocity, its proper specific kinematical parameter, which having the physical dimensions of a constant speed.

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This is the smallest unit of the machine and complete, its characteristics can not be separated out and meet all technical requirements. (For example, gears, shafts bike). Can put all the machine parts into two groups: - Detailed machine for general use (for example, bolts, gears; axis) is the machine parts used in many different machines. Details specific use machines have been used only in a certain number. (eg, crankshaft, valves, cam ...)

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Fundamental Operating Principles This chapter describes the basic interaction between transponder and reader, in particular the power supply to the transponder and the data transfer between transponder and reader (Figure 3.1). For a more in-depth description of the physical interactions and mathematical models relating to inductive coupling or backscatter systems please refer to Chapter 4.

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