High-strength magnetic materials

Two new precipitation-hardened magnetic alloys are suitable for operation in 800 to 1600 deg F range. One is a martensitic alloy and the other a cobalt-based alloy. They possess improved creep resistance and have application in high temperature inductors and alternators

How the iPhone Widens the United States Trade Deficit with the People's Republic of China

In this paper, the authors use the iPhone as a case to show that even high-tech products invented by United States (US) companies will not increase US exports, but on the contrary exacerbate the US trade deficit. The iPhone contributed US$1.8 billion to the US trade deficit with the People’s Republic of China (PRC). Unprecedented globalization, well organized global production networks, repaid development of cross-country production fragmentation, and low transportation costs all contributed to rational firms such as Apple making business decisions that contributed directly to the US trade deficit reduction. Global production networks and highly specialized production processes apparently reverse trade patterns: developing countries such as the PRC export high-tech goods—like the iPhone—while industrialized countries such as the US import the high-tech goods they themselves invented. In addition, conventional trade statistics greatly inflate bilateral trade deficits between a country used as export-platform by multinational firms and its destination countries.sino-us trade; apple iphone; world trade patterns

4-Diethyl­amino-3,5-diisopropyl­benzalde­hyde

The title benzaldehyde, C17H27NO, was prepared via lithia­tion of bromoaniline and reaction with DMF. In the crystal, the molecule adopts a C2-symmetrical conformation; nevertheless, two modes of disorder are present: the orientation of the aldehyde group (occupancy ratio 0.5:0.5) and of symmetry-equivalent ethyl groups [occupancy ratio 0.595 (7):0.405 (7)]. The phenyl­ene ring and the carbonyl group are essentially coplanar [C—C—C—O torsion angle = −179.0 (4)°] but the dihedral angle between the mean planes of the phenyl­ene ring and the amino group = 67.5 (2)°. This and the long [1.414 (3) Å] aniline C—N bond indicate electronic decoupling between the carbonyl and amino groups. The angle sum of 359.9 (2)° around the N atom results from steric compression-induced rehybridization

(E,E,E,E)-2,3,5,6-Tetra­kis{2-[4-(dimethyl­amino)­phen­yl]ethen­yl}pyrazine

In the title compound, C44H48N6, the essentially planar mol­ecule [maximum deviation from the mean plane of the π system of 0.271 (3) Å] is located on a crystallographic centre of inversion. The almost planar (angle sums at N atoms = 357.6 and 357.1°) dimethyl­amino groups and short C—N bonds of the aniline groups [both 1.379 (4) Å] indicate strong electronic coupling between these groups and the central pyrazine ring

Decachloro­hexa-1,5-diene

The title compound, C6Cl10, cystallizes in a nearly C2-symmetrical gauche conformation. Both trichloro­vinyl groups are nearly planar [Cl—C—C—Cl torsion angles = −178.47 (12) and −179.93 (11)°] and the lengths of their C—Cl bonds increase from the terminal trans and cis C—Cl bonds to the inter­nal bonds. The Cl—C—Cl bond angles of the terminal dichloro­methyl­ene units are compressed to 111.75 (11) and 111.40 (11)°

A Study of the Coupling of Acoustic Energy from the Troposphere to the Ionosphere Final Technical Report

Acoustic energy wave coupling effects from troposphere to ionosphere studied during rocket launchings and thunderstorm

Sedimentological characterization of Antarctic moraines using UAVs and Structure-from-Motion photogrammetry

In glacial environments particle-size analysis of moraines provides insights into clast origin, transport history, depositional mechanism and processes of reworking. Traditional methods for grain-size classification are labour-intensive, physically intrusive and are limited to patch-scale (1m2) observation. We develop emerging, high-resolution ground- and unmanned aerial vehicle-based ‘Structure-from-Motion’ (UAV-SfM) photogrammetry to recover grain-size information across an moraine surface in the Heritage Range, Antarctica. SfM data products were benchmarked against equivalent datasets acquired using terrestrial laser scanning, and were found to be accurate to within 1.7 and 50mm for patch- and site-scale modelling, respectively. Grain-size distributions were obtained through digital grain classification, or ‘photo-sieving’, of patch-scale SfM orthoimagery. Photo-sieved distributions were accurate to <2mm compared to control distributions derived from dry sieving. A relationship between patch-scale median grain size and the standard deviation of local surface elevations was applied to a site-scale UAV-SfM model to facilitate upscaling and the production of a spatially continuous map of the median grain size across a 0.3 km2 area of moraine. This highly automated workflow for site scale sedimentological characterization eliminates much of the subjectivity associated with traditional methods and forms a sound basis for subsequent glaciological process interpretation and analysis

High temperature /800 to 1600 F/ magnetic materials

Tests of magnetic materials from 800 to 1600

5-Pentyl-1H-tetra­zole

The title compound C6H12N4, is one of a few known tetra­zoles with an alkyl chain in the 5-position. The asymmetric unit contains two independent mol­ecules. The mol­ecules are linked by N—H⋯N inter­actions into chains with graph-set notation D(2) and C 2 2(8) along [010]. The two independent mol­ecules form a layered structure, the layers being composed of inter­digitating strands of alternatingly oriented and nearly identical mol­ecules