Distance and surface

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  • After four centuries a quote from Galileo Galilei is still the most effective way to introduce a Metrology book: “Measure what is measurable, and make measurable what is not so”. Every human activity needs an objective measurement and every global process should be supported by a common standard. There are several handbooks, tutorials and journals that focus on the basic concepts of metrology, the uncertainty theory and the international reference standards. Moreover, the engineering literature is awash with measurement methods for each specific field.

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  • We are privileged to be living in one of the greatest eras of exploration that humankind has ever undertaken. Our current Age of Space grew out of the dark struggles of World War II when large rockets were developed as agents of mass murder. The subsequent Cold War rivalry between the United States and Soviet Union pushed rocket capabilities to the point that it became possible to send vehicles into Earth orbit and beyond (even though the stated aim was to send missiles carrying nuclear weapons over mere continental distances). The Russians put the first human into Earth orbit.

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  • Volcanic eruptions are awesome and destructive; however, this natural phenomenon is beneficial in the long term. One of the earliest known written records of a natural disaster concerned the eruption of Pompeii in A.D. 79, and was recorded by Pliny the Younger in his letters to the historian Tacitus (Jashemski, 1979). Volcanic eruptions, ranging in intensity and numbering between 17 and 27 per year during the past decade (Bullard, 1984), continue to remind us of their potential impacts on the environment.

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  • The effects of process parameter such as the applied voltage, tip–collector distance and the solution flow rate on the fiber generation and morphology of final fiber were optimized. Nanofibers morphology and structure were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The prepared fibers had a smooth surface and fine morphology.

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  • The present study was undertaken to assess the status of soil pH, EC and OC in one hundred and eighty soil samples collected from different land use systems of district Doda. A soil survey was conducted in the month of April, 2016 to assess soil pH, EC and OC. Composite surface soil samples were collected using stratified random sampling method at a depth of 0-15 cm from Agriculture, Barren lands and at a depth of 1 metre from Forest, Horticulture of district Doda. The exact sample location was recorded using a handheld GPS receiver.

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  • Non-covalent interactions in term of hydrogen bond in complexes of chloroform with hydrogen cyanide and its fluoride derivative were investigated thoroughly by scanning the potential energy surface. The complexes of both examined systems show blue-shift at their most stable geometries. All of systems experience the contraction in C-H bond length at long distances. At specific RN-H distance, the C-H bond of CHCl3 molecule in complexes with FCN tends to be more blue-shifted than one in connection with HCN counterpart.

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  • The structures of biological macromolecules provide a framework for studying their biological functions. Three-dimensional structures of proteins, nucleic acids, or their complexes, are difficult to visualize in detail on flat surfaces, and algorithms for their spatial superposition and comparison are computationally costly.

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  • Written by a premier astronomy expert, this book begins with a discussion of the Sun, from sunspots to solar eclipses. It then features over 100 tables on characteristics of the Moon, and the names, positions, sizes, and other key descriptors of all the planets and their satellites. The book tabulates solar and lunar eclipse, comets, close-approach asteroids, and significant meteor showers dates. Twenty-four maps show the surface features of the planets and their moons. The author then looks to the stars, their distances and movements, and their detailed classification and evolution.

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  • 109 if we think of the graph of the distance function in Rn . This is a surface S in R n and if we follow the extrema of distance on this surface, the roadmap of this paper is exactly a roadmap in the sense of 18 and 19 . The silhouette curves of 18 correspond to the freeway curves of this paper, and the linking curves correspond to bridges. Recall the basic property required of roadmaps:  +1 De nition A subset of R of a set S satis es the roadmap condition if every connected component of S contains a single...

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  • An ocean wave is an undulation of the sea surface. Wave crest,Wave trough,Wave height,Wave lengt,Wave period Progressive waves move across the sea surface.,Standing waves oscillate about a fixed point. Wind velocity : Wind duration, Fetch (distance over which wind blows), Simply put, wave size increases as all these factors increase.

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  • 3 Temporary Planktonic Existence 3.1 RELEASE OF PROPAGULES INTO PLANKTON The sources of colonization of living and non-living (inert) surfaces in the marine environment are communities inhabiting hard substrates of natural and artificial origin, and also soft grounds (see Chapter 1). They release dispersal forms, usually called propagules, into water: microorganisms, animal larvae, and macroalgal spores, which are potential colonists (foulers). The contribution of different hard-substrate communities to the colonization (biofouling) process is not the same.

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  • In this paper, we focus our attention on providing a formal framework for expressing data mining tasks in- volving time granularities, and on proposing efficient algo- rithms for performing such tasks. To this end, we introduce the notion of an event structure. An event structure is essen- tially a set of temporal constraints on a set of variables representing events. Each constraint bounds the distance between a pair of events in terms of a time granularity.

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  • where V is the volume worn away, W is the normal load, x is the sliding distance, H is the hardness of the surface being worn away, and k is a nondimensional wear coefficient dependent on the materials in contact and their exact degree of cleanliness. The term k is usually interpreted as the probability that a wear particle is formed at a given asperity encounter. Equation (21.5) suggests that the probability of a wear-particle formation increases with an increase in the real area of contact, Ar (Ar = W=H for plastic contacts), and the sliding distance. ...

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  • The solution structure ofNereis diversicolorsarcoplasmic calcium-binding protein (NSCP) in the calcium-bound form was determined by NMR spec-troscopy, distance geometry and simulated annealing. Based on 1859 NOE restraints and 262 angular restraints, 17 structures were generated with a rmsd of 0.87 A ˚ from the mean structure. The solution structure, which is highly similar to the structure obtained by X-ray crystallography, includes two open EF-hand domains, which are in close contact through their hydrophobic surfaces....

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  • The present study was conducted during the year 2018 and 2019 at Department of Soil Science and Agricultural Chemistry, Dr Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra with an aim to know the macro and micronutrient status of soils of Washim road farm, Dr. PDKV Akola. Grid based (GPS) forty-four (44) surface (0-20 cm depth) soil samples were collected by grid survey method at 200m distance from Washim road farm and analyzed as per standard procedure for judging chemical properties and available nutrient status of soil.

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  • Power weeder uproots the weeds between the paddy crop rows with 25 cm row to row distance, in addition to, it keeps the soil surface loose for better soil aeration and water intake capacity. In this study modification was done to existing STIHL power weeder which is operated in line with the attachment of float and covering structure on weeding wheel to avoid mud splash over operator. In this study, the existing weeder and modified weeder has studied ergonomically. 3-axis accelerometer, showed that modified weeder has less vibration of 1.984 m/s2 from the existing weeder.

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  • Circumferences of circles are used in calculating speeds of rotating machine parts, including drills, reamers, milling cutters, grinding wheels, gears, and pulleys. These speeds are variously referred to as surface speed, circumferential speed, and peripheral speed; meaning for each, the distance that a point on the surface or circumference would travel in one minute.

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  • Introduction: Nanoelectrode ensembles (NEEs) are nanotech-based electroanalytical tools that find application in a variety of fields ranging from electroanalysis to sensors and electronics. The NEEs are fabricated by growing metal nanowires in the pores of a template microporous membrane. The density of the pores in the template determines the number of nanoelectrode elements per surface unit and the average distance between the nanoelectrode elements. The preparation of nanoelectrode using microporous membranes as templates distinguishes itself for its simplicity and wide applicability. ..

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  • As carriers begin deploying FTTX architectures, they are focusing a lot of attention on the outside plant (OSP) segment. And why not? This architecture presents many challenges with passive optical networking (PON) technology, thousands of distribution lines and connections, power and distance concerns, and so many other issues to address. Basically, the mindset is that if a problem is going to surface during the FTTX deployment, it will likely happen downstream.

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