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Page 92
... frequency range ~ 1 to ~ 10 MHz . Con- tributions to the ultrasonic attenuation due to viscous rela- tive motion losses and thermal losses are shown to exhibit an approximately linear dependence on frequency . Numer- ical estimates of ...
... frequency range ~ 1 to ~ 10 MHz . Con- tributions to the ultrasonic attenuation due to viscous rela- tive motion losses and thermal losses are shown to exhibit an approximately linear dependence on frequency . Numer- ical estimates of ...
Page 93
... frequency attenuation measure- ments . Additionally , the 100 MHz data indicate that the frequency dependence of the attenuation coefficient ob- served in the 1 to 10 MHz range for infarcted and normal myocardium may not hold in the 10 ...
... frequency attenuation measure- ments . Additionally , the 100 MHz data indicate that the frequency dependence of the attenuation coefficient ob- served in the 1 to 10 MHz range for infarcted and normal myocardium may not hold in the 10 ...
Page 94
... frequency for specific tissue paths ( i.e. , from skin to back surface of the excised breast ) , which included ( 1 ) the malignant tumor , ( 2 ) the nipple and ( 3 ) the areola . For the tissue path which included the malignant tumor ...
... frequency for specific tissue paths ( i.e. , from skin to back surface of the excised breast ) , which included ( 1 ) the malignant tumor , ( 2 ) the nipple and ( 3 ) the areola . For the tissue path which included the malignant tumor ...
Page 95
... frequency signature is presented for humans . Applications of the model are discussed to the detection of pulmonary embol- ism , atelectasis , pulmonary edema , and chronic lung dis- ease . Angle scan and frequency - swept ultrasonic ...
... frequency signature is presented for humans . Applications of the model are discussed to the detection of pulmonary embol- ism , atelectasis , pulmonary edema , and chronic lung dis- ease . Angle scan and frequency - swept ultrasonic ...
Page 96
... frequency , implying that bone is viscoelastic even at these high frequencies . Attenuation and dispersion of ... frequency over the range extending from 0.3 MHz to 3.0 MHz . The frequency dependence of insertion loss and of phase speed ...
... frequency , implying that bone is viscoelastic even at these high frequencies . Attenuation and dispersion of ... frequency over the range extending from 0.3 MHz to 3.0 MHz . The frequency dependence of insertion loss and of phase speed ...
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Page 1 - Monographs — Major contributions to the technical literature on various subjects related to the Bureau's scientific and technical activities. Handbooks — Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations, and regulatory bodies. Special Publications...
Page 2 - Building Science Series — Disseminates technical information developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test methods, and performance criteria related to the structural and environmental functions and the durability and safety characteristics of building elements and systems.
Page 148 - Studies or reports which are complete in themselves but restrictive in their treatment of a subject. Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject area. Often serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies.
Page 143 - Provides quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated.
Page 1 - This monthly magazine is published to inform scientists, engineers, businessmen, industry, teachers, students, and consumers of the latest advances in science and technology, with primary emphasis on the work at NBS. The magazine highlights and reviews such issues as energy research, fire protection, building technology. metric conversion. pollution abatement, health and safety, and consumer product performance. In addition, it reports the results of Bureau programs in measurement standards and techniques,...
Page 146 - Register serves as the official source of information in the Federal Government regarding standards issued by NBS pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat...
Page 2 - NBS pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat. 1127), and as implemented by Executive Order 11717 (38 FR 12315, dated May 11, 1973) and Part 6 of Title 15 CFR (Code of Federal Regulations).