FT-IR microanalysis of mineral separates from primitive meteorites: techniques, problems and solutions

From the Introduction: We compared several methods of infrared micro spectroscopy using an FT-IR microscope and workbench. This is part of a project to assemble a database of infrared and optical spectra from mineral separates from meteorites, for comparison with astronomical data. Since we usually have to work with small amounts of material (original grain sizes often <50 m), special sample preparation and analytical procedures have to be applied

FT-IR micro-spectroscopy of fine-grained planetary materials: further results

We present data from FT-IR microspectroscopy of olivines in a thin section of the LL3.6 ordinary chondrite Parnallee. Results are discussed and compared with other methods of FT-IR microspectroscopy

The Glad Rag

Women, holding an umbrella, standing on a pierhttps://scholarsjunction.msstate.edu/cht-sheet-music/13747/thumbnail.jp

Kajian Awal Mengenai Performance Intensity (Momentum Management) Untuk Mengukur Kinerja Waktu Proyek Konstruksi

Setiap Proyek Konstruksi memiliki keunikan sendiri dan tidak sama. Salah satu faktor yang menyebabkan keunikan tersebut adalah Owner proyek. Setiap Owner memiliki keinginan yang berbeda-beda dalam hal biaya, mutu dan waktu. Ketiga kriteria itu sama-sama penting, namun sangat jarang salah satu kriteria tidak lebih dominan dibandingkan dengan kriteria lainnya. Bagi Owner yang lebih mementingkan kriteria waktu maka Momentum Management merupakan metode yang sesuai karena seluruh formula di dalamnya berbasis waktu. Salah satu rumusan penting yang terdapat dalam Momentum Management adalah Performance Intensity. Tujuan dari penelitian ini adalah mengenal metode Momentum Management dengan cara melakukan studi literatur dan menerapkannya pada proyek konstruksi yang ada. Pencatatan progress harian dan perhitungan performance dilakukan untuk mengetahui keadaan proyek actual dan prediksi terhadap akhir proyek. Hasil performance dan Prediksi yang diperoleh dengan Momentum Management dapat menjadi early warning bagi para kontraktor proyek. Kontraktor dapat melakukan tindakan antisipasi lebih dini sebelum proyek terlambat lebih jauh

Can a Logarithmically Running Coupling Mimic a String Tension?

It is shown that a Coulomb potential using a running coupling slightly modified from the perturbative form can produce an interquark potential that appears nearly linear over a large distance range. Recent high-statistics SU(2) lattice gauge theory data fit well to this potential without the need for a linear string-tension term. This calls into question the accuracy of string tension measurements which are based on the assumption of a constant coefficient for the Coulomb term. It also opens up the possibility of obtaining an effectively confining potential from gluon exchange alone.Comment: 13 pages, LaTeX, two figures not included, available from author. revision - Line lengths fixed so it will tex properl

In The Valley Where The Blue Grass Grows : A Home Ballad

https://digitalcommons.library.umaine.edu/mmb-vp/4900/thumbnail.jp

Mid-infrared spectroscopy of CAI and AOA from the Allende CV3.2 chondrite

Mid-infrared spectra of bulk CAI from the CV3.2 chondrite Allende are presented and compared with astronomical spectra of cometary dust, zodiacal light,the circumstellar disk of beta Pictoris and dust around the red supergiant PR Per

Recurrent shell infall events in a B0.5e star: HD 58978 1979-1988

Infall from the circumstellar envelope onto the bright B0.5 IVe star, HD 58978 was studied. The IUE data indicate that the star was surrounded by a low and moderately ionized circumstellar shell at least 12 times between 1979 and 1988. During 6 of these episodes, the signatures of cool circumstellar material were redshifted with respect to the photosphere by 20 to 80 km/sec. The data indicate that the transition from infall to minimal shell absorption can occur in under 10 days, and are consistent either with infall phases lasting up to 6 months, or with infall episodes shorter than 10 to 15 days. The long term behavior of the shell episodes is compared with variability in the stellar wind

Petrology and geochemistry of nakhlite MIL 03346: A new Martian meteorite from Antarctica

MIL 03346 is the first nakhlite in the US Antarctic collection. We have performed detailed mineralogical and bulk-geochemical investigations to compare petrogenesis of this Martian meteorite with other nakhlites

Simultaneous excitation of fast and slow surface plasmon polaritons in a high dielectric contrast system

Surface plasmon polaritons propagating in a high dielectric contrast system are investigated numerically. Using frequency domain simulations, we show that a three layer system consisting of air-silicon (7 nm)-silver supports two different modes at the Ag-Si interface: a fast mode, which exhibits normal dispersion, and a slow mode, which exhibits anomalous dispersion. Near the Ag-Si surface plasmon polariton resonance frequency, surface waves with a wavelength of 25 nm are observed at a vacuum wavelength of 595 nm, equivalent to lambda(f)/24. The results show the possibility of exciting surface waves with extreme ultraviolet wavelengths using visible frequencies