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Topic Area: Environment/Climate

Displaying records 311 to 320 of 445 records.
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311. Chromatographic Methods of Analysis for PAHs in Environmental Samples
Topic: Environment/Climate
Published: 6/1/1998
Authors: Dianne L Poster, Lane C Sander, Stephen A Wise

312. NIST/NOAA NS&T/EPA EMAP Intercomparison Exercise Program for Organic Contaminants in the Marine Environment: Description and Results of 1997 Organic Intercomparison Exercises - Mussel Tissue IX and Marine Sediment VII
Topic: Environment/Climate
Published: 6/1/1998
Authors: Reenie May Parris, Michele M Schantz, Stephen A Wise

313. Polycyclic Aromatic Hydrocarbon Structure Index
Series: Special Publication (NIST SP)
Report Number: 922
Topic: Environment/Climate
Published: 6/1/1998
Authors: Lane C Sander, Stephen A Wise

314. On the Bifurcation from Continuous to Segmented Chip Formation in Metal Cutting
Topic: Environment/Climate
Published: 3/4/1998
Authors: Timothy J Burns, Christopher J. Evans, Matthew A. Davies
Abstract: We describe a new approach to modeling chip formation in orthogonal machining. Metal cutting is interpreted as a nonlinear dynamical process with thermomechanical feedback, which is similar in many ways to an open chemical reactor. As the cutting spe ...

315. Lipid Accumulation and Fatty Acid Composition During Maturation of Three Pelagic Fish Species in Lake Baikal
Topic: Environment/Climate
Published: 3/1/1998
Authors: S Ju, John R Kucklick, T Koslova, H R Harvey

316. NIST Methods for the Certification of SRM 1941a, Organics in Marine Sediment, and SRM 1974a, Organics in Mussel Tissue (Mytilus edulis)
Topic: Environment/Climate
Published: 3/1/1998
Authors: Michele M Schantz, Bruce A Benner Jr, M K. Donais, M. J. Hays, William R. Kelly, Reenie May Parris, Barbara J. Porter, Dianne L Poster, Lane C Sander, Katherine E Sharpless, Robert D Vocke Jr, Stephen A Wise, M Levenson, Susannah B. Schiller, M Vangel
Abstract: The replacement Standard Reference Materials [SRM 1941, Organics in Marine Sediment, and SRM 1974, Organics in Muscle Tissue [Mytilus edulis], have been prepared and analyzed for the determination of trace organic constituents. SRM 1941a has been is ...

317. Experiences in the Grinding of Silicon Nitride on a Lower Cost High Speed CNC Grinder
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6079
Topic: Environment/Climate
Published: 1/16/1998
Authors: T W. Hwang, Eric Paul Whitenton, Christopher J. Evans
Abstract: An investigation into high speed grinding of ceramics has been conducted to understand machine dynamics, wheel wear, and ground surface morphology. Some preliminary results are reported for modal testing and wheel wear together with microscopic obser ...

318. Ductile-Regime Grinding of Brittle Materials
Topic: Environment/Climate
Published: 1/1/1998
Authors: Kenneth Blaedel, Christopher J. Evans, John S Taylor

319. Dynamic Problems in Hard Turning, Milling and Grinding
Topic: Environment/Climate
Published: 1/1/1998
Author: Matthew A. Davies
Abstract: In this chapter we examine the application of nonlinear dynamics to various problems in manufacturing. We focus on three practical machining processes currently receiving significant industrial attention: turning of hardened steels (hard-turning), hi ...

320. Frequency Domain Modal Estimation Techniques, Experimental Techniques
Topic: Environment/Climate
Published: 1/1/1998
Authors: S Fahey, Jon Robert Pratt
Abstract: In this brief, we discuss the estimation of modal parame-ters using single-degree-of-freedom approximations. Then, we proceed to review two multi-degree-of- freedom techniques for modal parameter estimations-the first based on dynamic matrices and th ...

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  • SP 250-XX: Calibration Services
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