Xem 1-9 trên 9 kết quả Ultrasonic source
  • The idea of using ultrasonic waves in medical and engineering fields came from military applications of sound waves in sonar systems. Sokolov, Firestone, Simons, and several other researchers are among the ones who studied this high frequency kind of wave in the first half of twentieth century. Ultrasonic waves are defined as those with frequencies higher than 20 kHz. The constant development of data acquisition systems and probes seems to work, removing the upper limit of the wave frequency that can be acquired.

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  • Recently, the use of oral fluids such as GCF, whole saliva and oral rinse as a means of evaluating host-derived products, as well as exogenous components (for instance: oral microorganisms and microbial products), has been suggested as potential sources and diagnostic markers, respectively for disease susceptibility (Sahingur and Cohen 2004; Buduneli and Kinane 2011).

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  • Renewable natural resources in the forefront to save the environment and we must do our best to find applications suitable for them. The production process is shown by the method of casting, rolling process including monitoring throughout the process. Innovative testing procedures described in electrochemistry, ultrasonic pulse velocity, fracture toughness in the macro-micro mechanical behavior and more. The coordination between the components, laminas and building parts are checked by different principles....

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  • Snow-balling technique was used to find further examples in the application of financing mechanisms, contact persons, as well as for finding additional information. Furthermore, also the second questionnaire (see Annex 24) was used as an additional information source. The interviews used a common interview guide which was adapted according to the type of actors interviewed and according to the type of information missing for the description of the single cases.

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  • Industry in Jepara comprises a complex network of relationships and flexible subcontracting. The first aim of this survey was therefore to investigate how these relationships are structured, and how production is organised and linked to the different market segments, including the sources of the wood. In addition, we sought to record and quantify these relationships to understand the contribution of a unit of raw material to the employment, education, and social wealth of people in the system7 .

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  • To analyze the market potential of a book and magazine store in the greater Ladbrokes area, we collected information from a number of sources. We gained information with respect to the market for books and magazines for each Regional District in northwest B.C. from the 1996 Statistics Canada Survey of Book Publishers and Exclusive Agents. We also obtained sales data for Northwestern B.C. and southern Alaska from the Publisher's Clearing House, U.S.

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  • Symantec has established some of the most comprehensive sources of Internet threat data in the world through the Symantec™ Global Intelligence Network. More than 240,000 sensors in over 200 countries and territories monitor attack activity through a combination of Symantec products and services such as Symantec DeepSight™ Threat Management System, Symantec Managed Security Services and Norton™ consumer products, as well as additional third-party data sources.

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  • The level of surface water quality protection is variable around the world in large part due to the relative effectiveness of environmental regulation and the degree to which science influences the regulatory process. In the United States, at the federal level, the Total Maximum Daily Load (TMDL) has been an effective policy and water quality management tool for dealing with both point source and non-point source pollution.

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  • The review of policies includes those at both international and national levels since international standards often inform those at the national level. The most fundamental and revealing sources of policy documentation relative to oxytocin, misoprostol, and magnesium sulfate are the essential medicines lists (EMLs) and standard treatment guidelines.

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