Equations to assess the impact resistance of fiber composites

Numerical analysis of impact resistance of composite materials containing fibers is discussed. Mathematical model of longitudinal impact resistance is presented. Potential impact resistance of various fiber composites as obtained by numerical analysis is presented as plotted curve

Bonding of strain gages to fiber reinforced composite plastic materials

Strain gage is installed during molding of composite and utilizes the adhesive properties of the matrix resin in the composite to bond the strain gage in place. Gages thus embedded provide data at all temperatures that the matrix can withstand

Criteria for selecting resin matrices for improved composite strength

Area under matrix of typical stress-strain diagram bounded by one percent strain is good index for priority assessment of matrix contribution to composite strength. Initial tangent modulus to stress-strain curve is useful parameter in translating matrix properties to composite properties

Microwave remote sensing of snow experiment description and preliminary results

The active and passive microwave responses to snow were investigated at a site near Steamboat Springs, Colorado during the February and March winter months. The microwave equipment was mounted atop truck-mounted booms. Data were acquired at numerous frequencies, polarizations, and angles of incidence for a variety of snow conditions. The experiment description, the characteristics of the microwave and ground truth instruments, and the results of a preliminary analysis of a small portion of the total data volume acquired in Colorado are documented

Evaluation of a wind-tunnel gust response technique including correlations with analytical and flight test results

A wind tunnel technique for obtaining gust frequency response functions for use in predicting the response of flexible aircraft to atmospheric turbulence is evaluated. The tunnel test results for a dynamically scaled cable supported aeroelastic model are compared with analytical and flight data. The wind tunnel technique, which employs oscillating vanes in the tunnel throat section to generate a sinusoidally varying flow field around the model, was evaluated by use of a 1/30 scale model of the B-52E airplane. Correlation between the wind tunnel results, flight test results, and analytical predictions for response in the short period and wing first elastic modes of motion are presented

The preparation of ultra fine beryllium powder by the amalgam process Technical report

Beryllium powder production by electrolysis of beryllium chloride-sodium chloride molten eutectic mixtur

Basic linear algebra subprograms for FORTRAN usage

A package of 38 low level subprograms for many of the basic operations of numerical linear algebra is presented. The package is intended to be used with FORTRAN. The operations in the package are dot products, elementary vector operations, Givens transformations, vector copy and swap, vector norms, vector scaling, and the indices of components of largest magnitude. The subprograms and a test driver are available in portable FORTRAN. Versions of the subprograms are also provided in assembly language for the IBM 360/67, the CDC 6600 and CDC 7600, and the Univac 1108

Studies in South Carolina Archaeology: Essays in Honor of Robert L. Stephenson

This multi-article volume was edited by Albert C. Goodyear, III, and Glen T. Hanson. Contents: Foreword.....ix Preface.....xi List of Contributors.....xiii List of Figures.....xv List of Tables.....xix South Carolina Human Remains as an Archaeological Resource: An Update - Ted A. Rathbun.....1 The Earliest South Carolinians - Albert C. Goodyear, III, James L. Michie, and Tommy Charles.....19 Pattern and Process in the Middle Archaic Period of South Carolina - Dennis B. Blanton and Kenneth E. Sassaman.....53 An Archaeological Overview of the South Carolina Woodland Period: It\u27s the Same Old Riddle - Michael B. Trinkley.....73 Sea Level Change, Estuarine Development and Temporal Variability in Woodland Period Subsistence-Settlement Patterning on the Lower Coastal Plain of South Carolina - Mark J. Brooks, Peter A. Stone, Donald J. Colquhoun, and Janice G. Brown.....91 The Mississippian in South Carolina - David G. Anderson.....101 Cofitachequi: Ethnohistorical and Archaeological Evidence - Chester B. DePratter.....133 From Archaeology to Interpretation at Charles Towne - Stanley South.....157 English-Spanish Conflict in 17th Century Carolina: A Theoretical Perspective - Michael Hartley.....169 Colonoware Ceramics: The Evidence from Vaughan and Curriboo Plantations - Patrick H. Garrow and Thomas R. Wheaton.....175 Lowcountry Plantations, the Catawba Nation, and River Burnished Pottery - Leland G. Ferguson.....185 An Examination of Historic Ceramic Seriation: A Case Study from the Savannah River Region of South Carolina - Richard D. Brooks and Glen T. Hanson.....193 Approaches to Archaeological Investigation of Charleston, South Carolina - Martha A. Zierden and Jeanne A. Calhoun.....207 Settlement Function and Archaeological Patterning in a Historic Urban Context: The Woodrow Wilson House in Columbia, South Carolina - Kenneth E. Lewis .....225 The Law and the Amateur in Resource Management - Alan Albright.....253 Index.....261https://scholarcommons.sc.edu/archanth_anthro_studies/1009/thumbnail.jp

Nanopositioning of a diamond nanocrystal containing a single NV defect center

Precise control over the position of a single quantum object is important for many experiments in quantum science and nanotechnology. We report on a technique for high-accuracy positioning of individual diamond nanocrystals. The positioning is done with a home-built nanomanipulator under real-time scanning electron imaging, yielding an accuracy of a few nanometers. This technique is applied to pick up, move and position a single NV defect center contained in a diamond nanocrystal. We verify that the unique optical and spin properties of the NV center are conserved by the positioning process.Comment: 3 pages, 3 figures; high-resolution version available at http://www.ns.tudelft.nl/q