| Kinetics of Sulfur Oxide, Sulfur Fluoride, and Sulfur Oxyfluoride Anions with Atomic Species at 298 and 500 K |
FEB 2007 |
9 pages |
| Authors:
Anthony J. Midey; A. A. Viggiano; BOSTON COLL CHESTNUT HILL MA
|
 | The rate constants and product-ion branching ratios for the reactions of sulfur dioxide {SO2(-)}, sulfur fluoride {SF (n)-}, and sulfur oxyfluoride anions {SO(x)F(y)-} with H, H2, N, N2, NO, and 0 have been measured in a selected-ion flow tube (SIFT). H atoms were generated through a microwave discharge on a H2/He mixture, whereas O atoms were created via N atoms titrated with NO, where the N had been created by ... |
|
| Development of Molecular Glasses for Use as Media for High-Density Optical Memory Based on Multi-Photon Absorption |
14 JUN 2005 |
7 pages |
| Authors:
BOSTON COLL CHESTNUT HILL MA
|
|
| Request for Funds for the Purchase of a Broadly Tunable Ti:Sapphire Laser for Research in High-Density Optical Memory |
14 MAY 2003 |
5 pages |
| Authors:
John T. Fourkas; BOSTON COLL CHESTNUT HILL MA
|
| Funds amounting to $155,782 were used for the purchase of a Coherent 900-F tunable Ti:sapphire laser system with a Verdi 10 pump laser in conjunction with matching funds from Boston College. The total cost of the laser system was $191,500. The system was successfully installed during the project period and is currently being used to study how the efficiency of data storage and retrieval depends on the wavelength of light ... |
|
| Analysis of Multiple Wavelength Lidar Backscatter From Cirrus |
01 FEB 2003 |
87 pages |
| Authors:
John R. Roadcap; Phan D. Dao; Patrick J. McNicholl; BOSTON COLL CHESTNUT HILL MA
|
| Lidar backscatter from cirrus cloud particles at multiple wavelengths (532 nm, 1064 nm, 10591 nm) was measured at Hanscom AFB, MA in August 2001. Range-resolved measurements were made for several hours daily at altitudes from 9 km to 16 km over a temperature range of -30C to -70C. Three days were selected for study -- 9 August, 14 August, and 16 August 2001. Cirrus backscatter measurements were analyzed in combination ... |
|
| Solar Wind-Magnetosphere-Ionosphere Coupling |
SEP 2000 |
6 pages |
| Authors:
C. W. Huang; BOSTON COLL CHESTNUT HILL MA
|
| Effort under this contract deals with coupling between the solar wind, magnetosphere and ionosphere. We have completed a series of studies ranging from active experiments in the auroral ionosphere to substorm triggering in the magnetosphere. |
|
| Generation and Amplification of Radiation in Millimeter/Submillimeter Range through Current Driven Plasma Instabilities in Modulated Lower Dimensional Solid State Systems |
SEP 1998 |
9 pages |
| Authors:
BOSTON COLL CHESTNUT HILL MA
|
| We have introduced and studied new promising systems, which could lead to experimental verification and device applications of current driven plasma instabilities in lower dimensional solid state systems. These are: periodically modulated systems, quasi-1D bounded systems, and bounded systems with slab geometry. An interactive program for experimental verification of our results has been set-up with the Technical University, Vienna, Austria. The periodically modulated systems require significantly lower drift velocities compared ... |
|
| International Conference On Strongly Coupled Coulomb Systems |
22 AUG 97 |
19 pages |
| Authors:
Gabor J. Kalman; BOSTON COLL CHESTNUT HILL MA
|
| The International Conference on Strongly Coupled Coulomb Systems meeting, by all accounts, was quite successful. The number of Participants was 157 from 23 countries, including, in addition to the U.S., Canada and Western Europe, Yugoslavia, Russia, Ukraine, Kazakhstan, Korea, Japan, China, India, and Australia. The interdisciplinary aspect of the Conference was much appreciated by most participants and it was generally agreed that the Conference had broken new ground by involving ... |
|
| Chemical Kinetics and Atmospheric Modification |
01 MAY 94 |
36 pages |
| Authors:
David L. McFadden; BOSTON COLL CHESTNUT HILL MA
|
| Electron attachment rate constants were obtained and negative ion product analysis was performed over the temperature between 300 and 1200 degrees range for a series of seventeen halomethane molecules that undergo dissociative electron attachment. The reactant molecules include CH3Cl, CH3Br,CH3I,CF3Cl, CF3Br,CF3I,CF2Cl2,CFC13,CC14,CF3H,CF2H2,CH3F,CF2HC1, CHFC12,CH2Br2,CC12H2, and CC13H. Positive activation energies were observed for most of the reactions. The results of molecular structure calculations for both the neutral and anionic species suggest that the ... |
|
| Chemical Kinetics and Atmospheric Modification. |
01 MAY 1994 |
|
| Authors:
David L. McFadden; BOSTON COLL CHESTNUT HILL MA
|
 | Electron attachment rate constants were obtained and negative ion product analysis was performed over the temperature range 300 < or = T (K) < or = 1200 for a series of seventeen halomethane molecules that undergo dissociative electron attachment. The reactant molecules include CHsub3Cl, CHsub3Br, CHsub3I, CFsub3Cl, CFsub3Br, CFsub3I, CFsub2CLsub2, CFClsub3, CClsub4, CFsub3H, CFsub2Hsub2, CHsub3F, CFsub2HCl, CHFCLsub2, CHsub2Brsub2, CClsub2Hsub2, and CClsub3H. Positive activation energies were observed for most of the ... |
|
| Investigation of Lateral Variation in the Seismic Velocity Structure of the Shallow Crust Beneath Eastern Massachusetts and Southern New Hampshire |
30 SEP 93 |
99 pages |
| Authors:
S. E. D'Annolfo; A. L. Kafka; BOSTON COLL CHESTNUT HILL MA
|
| This is one of five scientific reports describing specific research projects conducted at Weston Observatory under Contract No. F19628-90-K-0035. The research conducted under this contract covers a range of topics related to seismology in general and to nuclear test monitoring in particular. This report describes a study in which group velocity dispersion was determined for short- period Rayleigh waves recorded from blasts detonated at the San-Vel quarry in Littleton, MA. ... |
|
| Improving Career Selection with the Armed Services Vocational Aptitude, |
17 APR 1992 |
|
| Authors:
Kenneth W. Wegner; BOSTON COLL CHESTNUT HILL MA
|
| The purpose of this study was to develop an improved system for using interest inventory scores in the new ASVAB 18/19-Career Exploration Program. Several procedures for assigning Holland vocational typology codes to occupations were compared across three of the most frequently used classification systems. The results indicate that using rank order by elevation of mean typology scale scores is a highly efficient and consistent method of determining codes. This method ... |
|
| The Earth's Radiation Belts, Auroral Zones, and Polar Caps: Particle Models, Event Studies, and Effects on Materials |
16 APR 92 |
172 pages |
| Authors:
R. L. Carovillano; BOSTON COLL CHESTNUT HILL MA
|
| Projects include: (1) An empirical DMSP data base of the most poleward ion precipitation boundary: The data base was analyzed statistically and analytically. At each MLT there is great variance, and the ion boundary correlates best with AE. The average boundary is a circle offset from the geomagnetic pole that expands with geomagnetic activity. (2) An analytical model of convection and currents in the height-integrated ionosphere coupled to field aligned ... |
|
| Equation of State and Conductivity of Hot, Dense Matter |
31 DEC 90 |
6 pages |
| Authors:
Gabor J. Kalman; BOSTON COLL CHESTNUT HILL MA
|
| The purpose of the research program reported there was to develop and apply a novel method to the calculation of the Equation of State (EOS), Mean Charge State (MCS) (or degree of ionization) and conductivity of dense plasmas of moderately high Z-numbers (Z < 30). The method to be applied was the Thomas- Fermi model, modified and adapted to the dense plasma environment. The innovative elements of the approach are: ... |
|
| Multidisciplinary Geophysical Study of the Earth's Upper Structure |
27 DEC 88 |
|
| Authors:
James W. Skehan; John F. Devane; Alan L. Kafka; BOSTON COLL CHESTNUT HILL MA
|
| Investigations were made of: 1) Geophysical properties of the shallow crust underlying the Appalachians of southern New England by means of dispersion of Rg waves and electromagnetic methods; and 2) Deeper geological structure by interpretation of multichannel seismic reflection lines in the onshore and offshore portions of New England. Major contributions include: (1) Southern New England has been subdivided into Rg wave dispersion regions and correlations with tectonostratigraphic divisions of ... |
|
| Rocket Measurements Within a Polar Cap Arc: Ionospheric Modelling |
19 NOV 87 |
|
| Authors:
Robert E. Sheehan; BOSTON COLL CHESTNUT HILL MA
|
| Precipitating electron fluxes measured over a polar cap, F-region auroral arc were input to an ionospheric model that calculates production rate and density profiles of various species. The model also finds the electron temperature and electric conductivities over a specified altitude range. Most model results compare favorably with rocket measurements taken near apogee over the arc. The actual electron temperature is underestimated by the model and the relative densities of ... |
|
| Model Results with PIIE (Polar Ionospheric Irregularities Experiment) Rocket Data |
26 SEP 86 |
|
| Authors:
Robert E. Sheehan; BOSTON COLL CHESTNUT HILL MA
|
| Precipitating electron fluxes measured over a polar cap, F-region auroral arc were input to an ionospheric model code that calculates density profiles of various species and the electron temperature. Most model results compare favorably with rocket measurements taken near apogee over the arc. The actual electron temperature is underestimated by the model and the relative densities of some minor species do not agree. Model results show that initial conditions are ... |
|
| Thermosphere Structure Variations during High Solar and Magnetic Activity Conditions |
30 SEP 85 |
|
| Authors:
Jeffrey M. Forbes; BOSTON COLL CHESTNUT HILL MA
|
| Analyses of satellite accelerometer and rocket grenade and pitot tube data are performed to delineate the seasonal latitudinal variability of temperature and density between 80 and 120 km, and the latitude time dependence of temperature, density, and wind variability at satellite attitudes during geomagnetically disturbed conditions. A two cell pattern of neutral winds is inferred from the satellite data that intensifies and expands spatially in response to increased magnetic activity. ... |
|
| Strong Coupling Effects on Bound States in Plasmas |
FEB 85 |
|
| Authors:
G. J. Kalman; BOSTON COLL CHESTNUT HILL MA
|
| Progress and results on four major areas is reported: (i) Problems relating to correlations affecting the average field in a strongly coupled plasma; (ii) Problems relating to the dispersion of plasma oscillations affecting the fluctuating field in a strongly coupled plasma; (iii) Analysis and establishment of methods for the calculation of the degree of ionization and of the shift of energy levels of an ion embedded in a strongly coupled ... |
|
| Strong Coupling Effects on Bound States in Plasmas |
MAR 1983 |
|
| Authors:
Gabor J. Kalman; BOSTON COLL CHESTNUT HILL MA
|
| Further progress in the areas of (1) kinetics and response of strongly coupled multi-component plasmas, (2) study of plasma phase transition and determination of the degree of ionization of a dense plasma, and (3) generalization of the Thomas-Fermi-Debye-Huckel scheme for strongly coupled plasmas with atoms and ions, is reported: A multi-species formalism has been worked out. Details of the phase transition and of the critical curve have been found. Relationship ... |
|
| Requirements for Validating System Models, |
25 JAN 1983 |
|
| Authors:
M. S. Gussenhoven; BOSTON COLL CHESTNUT HILL MA
|
| As computer models become larger and more complex we have to do some hard thinking about how they can be validated, and then how they can become a permanent part of our collective scientific thinking. Until, recently, the only form of quantitative expression was in explicit manipulation of mathematical functions. This form of expression probably reached its pinnacle in the 1950s in quantum field theory. It was also accompanied by ... |
|
| Strong Coupling Effects on Bound States in Plasmas |
AUG 1982 |
|
| Authors:
Gabor J. Kalman; BOSTON COLL CHESTNUT HILL MA
|
| Progress in three major areas is reported: (1) Kinetics and response of strongly coupled multi-component plasmas. (2) Study of plasma phase transition and determination of the degree of ionization of a dense plasma (3) Generalization of the Thomas-Fermi-Debye-Huckel scheme for strongly coupled plasmas with atoms and ions. (Author) |
|
| Inversion of Spire NO Data |
20 AUG 1981 |
35 pages |
| Authors:
A. S. Zachor; R. D. Sharma; R. M. Nadile; A. T. Stair Jr; BOSTON COLL CHESTNUT HILL MA
|
| An algorithm was developed to invert spectrally resolved Earth limb radiance profiles. It is applicable in the nonequilibrium altitude regime for species/tangent heights that correspond to the optically thin condition. It was used to infer vertical distributions of temperature and excited NO density from data measured by SPIRE (the Spectral Infrared Rocket Experiment) in the NO fundamental band near 5.3 microns. The solution for excited NO density was used to ... |
|
| AN INVESTIGATION OF PROPERTIES OF THE LASER MICROPROBE |
13 AUG 1965 |
88 pages |
| Authors:
James J. Devlin; Anthony B. La Conti; BOSTON COLL CHESTNUT HILL MA
|
| An investigation of the Laser Microprobe as a source for emission spectrochemical analysis is reported. The size and character of the crater: burnt into a number of pure element metals was investigated. Working curves for a series of iron and aluminum alloys were produced. This gave a measure of the sensitivity and reproducibility of the Laser Microprobe. |
|
| DETERMINATION OF THE ORIENTATION OF THE AXIS OF A ROCKET OR SATELLITE IN ITS TRAJECTORY OR ORBIT |
16 AUG 1963 |
21 pages |
| Authors:
Rene J. Marcou; BOSTON COLL CHESTNUT HILL MA
|
| A method is developed for determining the aspect of the axis of a rocket or satellite with respect to an earth based system of coordinates for the case where these bodies undergo a constant precessional motion about some fixed direction. The analysis is based on data obtained from a magnetometer mounted on the body. The only information needed for the determination of the aspect of the axis is the maximum ... |
|
| RESEARCH DIRECTED TOWARD THE STUDY OF RAPID FLUCTUATIONS OF THE GEOMAGNETIC FIELD |
31 Oct 1962 |
61 pages |
| Authors:
Daniel Linehan; BOSTON COLL CHESTNUT HILL MA
|
| Analysis and measurement of terrestrial magnetism; study of rapid fluctuations of the geomagnetic field. Research was directed toward the study of rapid fluctuations of the geomagnetic field. An investigation was made of the characteristics and origins of the natural magnetic field fluctuations in the frequency range of approximately 0.01 to 50 cps with particular emphasis on frequencies from about 0.1 to 3 cps. Field records were made of the fluctuations. ... |
|
Reports by Corporate Author
