Comprehensive Organic Analysis of Antartic Micrometeorites

Introduction: Micrometeorites (MMs) are thought to be significant contributors of organic material to the early Earth [1], and a variety of techniques have been employed to identify their organic composition [2-6]. These include the identification of key organic groups using combinations of infrared, energy dispersive Xray, electron energy loss and Raman spectroscopy and scanning transmission X-ray microscopy [2-4], highlighting similarities between that of MMs and carbonaceous chondrites. Few studies, however, have focused on the characterisation of individual micrometeoritic organic components. Microscopic L2MS has been used to identify up to C5 polycyclic aromatic hydrocarbons and their alkyl derivatives [5]. A combination of ionexchange chromatography and fluorimetric detection has also been successful in identifying a number of protein amino acids including glycine and alanine [6]. We have previously reported a method to analyse ?g-sized quantities of extraterrestrial materials, with prior application to assessing organic volatile release from MM atmospheric entry heating simulations [7]. In this study we utilise this technique to characterise the organic composition of Antarctic terrestrial particles and MMs collected in 1994 from Cap-Prudhomme [8]

Pressure Contact Sounding Data for NASA's Atmospheric Variability Experiment (AVE 3)

The basic rawinsonde data are described at each pressure contact from the surface to sounding termination for the 41 stations participating in the AVE III measurement program that began at 0000 GMT on February 6 and ended at 1200 GMT on February 7, 1975. Soundings were taken at 3-hour intervals during a large period of the experiment from most stations within the United States east of about 105 degrees west longitude. Methods of data processing, change in reduction scheme since the AVE II pilot experiment, and data accuracy are briefly discussed. An example of contact data is presented, and microfiche cards of all the contact data are included in the appendix. The AVE III project was conducted to better understand and establish the extent of applications for meteorological satellite sensor data through correlative ground truth experiments and to provide basic experimental data for use in studies of atmospheric scales of-motion interrelationships

THE INDUSTRY HAS CHANGED, HAVE YOU? THE AGCO STORY

AGCO Corporation is a success story in the agricultural machinery sector. Utilizing marketing strategies of out-sourcing, cross-over selling, and a full line of products, AGCO markets its own way. In 7 years, AGCO has 18 brands sold through 7,000 dealerships in 140 countries. Acquisition and consolidation powered the growth of AGCO using nontraditional buyout financing. Herein lies its real success.Agribusiness, Industrial Organization,

Light forces in ultracold photoassociation

We study the time-resolved photoassociation of ultracold sodium in an optical dipole trap. The photoassociation laser excites pairs of atoms to molecular states of large total angular momentum at high intensities (above 20 kW/cm$^{2}$). Such transitions are generally suppressed at ultracold temperatures by the centrifugal barriers for high partial waves. Time-resolved ionization measurements reveal that the atoms are accelerated by the dipole potential of the photoassociation beam. We change the collision energy by varying the potential depth, and observe a strong variation of the photoassociation rate. These results demonstrate the important role of light forces in cw photoassociation at high intensities.Comment: 7 pages, 3 figure

A re-interpretation of the late Bronze Age metalwork hoards of Essex and Kent

Recent works have offered an alternative to traditional archaeological classification, particularly in the field of ceramic studies. These use theories of human categorisation processes derived from other areas of research, in particular psychology and linguistics. The purpose of this thesis was - through reference to the advances made in studies of this kind - to re-interpret a body of metalwork evidence, in particular the 'founder's hoards' of the 'Carp's Tongue' Complex in Essex and Kent. These hoards include a wide range of artefact categories, often surviving in fragmentary condition, and have traditionally been interpreted as an inevitable by-product of the metalworking process. By examining the nature of the contents and the structure of these hoards, and by making a detailed appraisal of the manner in which each of the individual artefact categories included was treated prior to its inclusion in the hoard, it was possible to establish that there was indeed a strong association with the metalworking process. It also became apparent that regularised methods of destruction were employed upon the artefact categories included in these hoards, and that specific selection processes operated during the accumulation of the hoard contents, with certain artefact categories being favoured for inclusion. It therefore seemed likely that, instead of being a direct by-product of the metalworking process, these hoards were instead collections of metalwork which deliberately referenced the metalworking process, as well as other routine activities, such as the agricultural cycle. By considering these findings within a wider context, it was possible to see these hoards as functioning as material props in ceremonies which created metaphorical associations between activities often perceived by archaeologists as being secular in character with more metaphysical aspects of existence, such as the transformation of the body after death

Venus cusp observations during 1969 - Synopsis of results

Venus cusp observations during 196