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Materials and structure

Xem 1-20 trên 674 kết quả Materials and structure
  • Today, the ultrasonic signal is being used for predicting material behavior, characterizing (detecting internal anomalies in) a variety of engineering structures, as well as for inspecting human body parts like tumors, bones, and unborn fetuses. Because of the ever-increasing popularity of the ultrasonic techniques in a wide range of applications, this technology has received a lot of attention from the research community. This book presents some new developments in ultrasonic research for material and structure inspection. Application areas cover both engineering and biological materials....

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  • Vocabulary practice materials, and structures in English English Advanced Vocabulary and Structure Practice. English grammar is the grammatical structure of English sentences just the place orderly, proper and harmonious relations between the word elements to form a complete sentence and regulations in order to communicate a correctly, and basically most scientific. English grammar can be generalized into two contents, which are the elements, elements in a sentence and the sequencing rules, and divide it, may, in verse form, the harmony between the elements in question ....

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  • In this study, effects of precursor materials and hydrothermal reaction time on the morphology, microstructures and photocatalytic activity of TiO2 nanotubes (TNTs) were investigated. Results show that the selection of nanopowder TiO2 precursors and hydrothermal time has significantly affected the morphology, microstructure and photocatalytic property of TiO2 nanotubes. TNTs–Merck was fabricated from TiO2–Merck precursor at 130 °C for 22 h possesses a uniform structure with a range of the diameter of ~ 10 nm and length of ~ 100 nm.

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  • Optoelectronics - Advanced Materials and Devices is a second edition following the initial Optoelectronics - Materials and Techniques book published in 2011 as part of the InTech collection of international works on optoelectronics. Optoelectronics, as the discipline devoted to the study and application of electronic devices that emit, detect, and otherwise control light, has widely proliferated globally and enabled many of today's modern conveniences.

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  • This book is intended to supply engineering professionals and students with a comprehensive and definitive reference to statics and dynamics of solids and structures. The book is for use as a resource and design tool in research and development, and for use as a study guide and learning aid in engineering education. The book is written to meet the needs for interactive computing in technical referencing and engineering education.

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  • Until relatively recent times, most periods of technological development have been linked to changes in the use of materials (eg the stone, bronze and iron ages). In more recent years the driving force for technological change in many respects has shifted towards information technology. This is amply illustrated by the way the humble microprocessor has built intelligence into everyday domestic appliances.

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  • Lately, there has been a growing interest in electromagnetic wave propagation in complex systems such as modern materials and structures. This book is intended to give the explanatory 20 chapters which consist of original works of the leading scientists in the field of wave propagation which produced theoretical and experimental methods in this field of research and obtained important results.

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  • The country case studies make clear that international partners share some of the blame, particularly because they too often fail to coordinate programs to help promote more integrated, comprehensive health care for women. However, it is equally clear that many of the obstacles are wholly local in nature: National governments and policymakers are often unable or unwilling to initiate or sustain health care programs and reforms that would improve women’s access to services and, by extension, reduce rates of vertical transmission.

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  • Common engineering materials reach in many engineering applications such as automotive or aerospace; their limits and new developments are required to fulfill increasing demands on performance and characteristics. The properties of mate- rials can be increased, for example, by combining different materials to achieve better properties than a single constituent or by shaping the material or constituents in a specific structure. Many of these new materials reveal a much more complex behavior than traditional engineering materials due to their advanced structure or composition.

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  • Nonlinear finite element analysis is an essential component of computeraided design. Testing of prototypes is increasingly being replaced by simulation with nonlinear finite element methods because this provides a more rapid and less expensive way to evaluate design concepts and design details.

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  • Finally, the HPDD sheds light on one of the leading issues of the day: the relationship between debt and growth. Separating countries into fast-, medium-, or slow–paced growers over 1885–2009, we find an intuitive pattern. 15 Fast growers consistently registered low debt ratios, while slow growers carried the highest debts for much of the sample period (Figure 7, upper panel). Further light is shed on the debt-growth relationship by a bubble chart that compares debt ratios and (total) PPP GDP (Figure 7, lower panel).

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  • An important barrier to quick process changes is the industry’s slow capital-turnover rate. A survey in 1997/8 revealed that the median age of paper ma- chines in Europe was 23 years (Berkhout, 2005). Recent research undertaken in the USA suggests a potential negative correlation between environmental innovation and sunk costs. The research suggests that no matter what the regulator does, because there will be much lobbying and negotiations undertaken as a part of the permitting process, regula- tors tend to favour existing actors over potential new entrants.

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  • B&W will provide the Architectural Design and Structural Steel Engineering and CADD Drafting for supply of design drawings which will be used by Sumitomo Corporation to purchase the fabricated structural steel boiler building and partial enclosure materials.

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  • KI has an exemplary record of achievement in adapting its manufacturing processes to minimise their impact on the environment. This has been recognised through many regional and national awards, including a Packaging Reduction Gold Achievement Award Presented by WasteWise in 2006. As an early pioneer of the focus on indoor air quality KI is a founder member the US Green Building Council and has many of its products certified by Greenguard for use in LEED accredited environments.

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  • Operations in the intermediate stage segregate some elements and group others, forming coherent representations. In late visual process- ing stages certain regions of the object are selected for further scrutiny, memories are activated, objects are recognized and associated with meanings. In the case of visual stimuli found to be aesthetically pleasing, these operations elicit emo- tional processes, which feedback into the system via attentional mechanisms.

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  • Human health can be affected by acute or chronic exposure to toxicants, through the media of water, wet land sediments, or even air when sediments becom dessicated and airborne or burnt. The nature of thes exposures is exacerbated by human behaviours and activities and they can result whenever ecosystem services have been eroded – especially when the hydrological services that maintain biological, geo logical and chemical processes have been distorted by human activities of over extraction of water.

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  • Everyone is affected by their oral health. Good oral health is a key component to a healthy life because it affects how we eat, speak and how we relate to each other with confidence in our healthy smiles. Pain and infection that may arise from oral diseases can affect our capacity to function as full members of society. For example, if you are kept from going to school, or from getting a job because of the condition of your teeth and mouth, then it may have economic and social impacts in your life. In some extreme cases, oral diseases...

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  • This paper proposes one-dimensional antenna arrays of the four-element and the eight-element using composite materials. Firstly, the single element is designed to resonate at Zeroth-order using a pair of Double positive (DPS) and Epsilon negative (ENG) materials meta-structured transmission line (MTL). Secondly, three of 1:2 T-Junction power dividers and seven of 1:2 T-Junction power dividers based on micro-strip technology are designed for feeding the four-element and the eight-element array antennas, respectively.

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  • For IELTS. "The essay is a commonly assigned form of writing that every student will encounter while in academia. Therefore, it is wise for the student to become capable and comfortable with this type of writing early on in her training." Section 3 has one longer text (about 700 words) with more complex lan¬ guage and structure. The text will be about a general topic and will come from sources like general interest magazines.

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  • Is a branch of polymer science dealing with analysis and characterisation of polymers. üThe complication of macromolecular chains, the dispersion in molecular weight, tacticity, crystallinity, orientation, composition of polymers etc. and complex morphological systems ⇒ analysis of polymer ≠ the small organic materials ⇒ Focus on viscoelastic properties, dynamic mechanical testing.

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