3,440 research outputs found
Interrelated structure of high altitude atmospheric profiles
A preliminary development of a mathematical model to compute probabilities of thermodynamic profiles is presented. The model assumes an exponential expression for pressure and utilizes the hydrostatic law and equation of state in the determination of density and temperature. It is shown that each thermodynamic variable can be factored into the produce of steady state and perturbation functions. The steady state functions have profiles similar to those of the 1962 standard atmosphere while the perturbation functions oscillate about 1. Limitations of the model and recommendations for future work are presented
The Dynamics of Identity Development: Exploring the Relevance of Separation-Individuation
The current study attempted to illuminate the patterns of relations between the processes of separation-individuation and identity development in a late adolescent, university sample. A total of 281 undergraduate volunteers participated in the study, each completing the Separation-Individuation Test of Adolescence (SITA), the Ego Identity Process Questionnaire (EIPQ), and a brief demographic survey. Results indicate that there are significant relations between these two processes and that those combinations of separation-individuation variables that are associated with more process in identity development may differ by the identity test under investigation. Utilizing a stepwise multiple regression, degree of identity exploration was found to be best predicted by the combination of separation anxiety, healthy separation, nurturance seeking, and peer enmeshment components of separation-individuation. Identity commitment was best predicted by a distinctly different combination: practicing mirroring, nurturance seeking, separation anxiety, and dependency denial. Results also indicated that certain components of separation-individuation may have different meanings for men than for women, suggesting the need for ongoing sensitivity to possibly gender differences in these developmental processes. Finally, results from the current study are compared with those of earlier investigations
Applications Technology Satellite and Communications Technology Satellite user experiments for 1967-1980 reference book. Volume 4: Abstracts
The important user experiments conducted during the fourteen year period from 1966 to 1980 are summarized. A description of each of the satellites and a brief summary of each user experiment is presented. A cross index of user experiments sorted by various parameters and a listing of keywords versus experiment number is included. The experiments are grouped by type of service offered; for example, education, health services, and data transmission. A bibliography of reports by accession number and by author is also presented. User viewpoints of the systems are presented
Applications Technology Satellite and Communications Technology Satellite user experiments for 1967 - 1980 reference book, volume 1
A description of each of the satellites is given and a brief summary of each user experiment is presented. A Cross Index of User Experiments sorted by various parameters and a listing of keywords versus Experiment Number are presented
Compendium of Applications Technology Satellite user experiments
The achievements of the user experiments performed with ATS satellites from 1967 to 1973 are summarized. Included are fixed and mobile point to point communications experiments involving voice, teletype and facsimile transmissions. Particular emphasis is given to the Alaska and Hawaii satellite communications experiments. The use of the ATS satellites for ranging and position fixing of ships and aircraft is also covered. The structure and operating characteristics of the various ATS satellite are briefly described
Sublingual immunotherapy for the treatment of allergies
The treatment of allergies often involves pharmacological therapy and recommendations by healthcare workers that the allergen should be avoided. Allergen-specific immunotherapy has emerged as an alternative to effectively decrease the immunoglobulin (Ig) E:IgG4 ratio. Two routes of administration are described, namely subcutaneous immunotherapy, which has always been considered to be the gold standard of treatment, and sublingual immunotherapy, which has recently been shown to have fewer systemic side-effects and improved compliance by patients.Keywords: AIT, allergic disease, allergen-specific immunotherapy, allergic rhinitis, clinical efficacy, SCIT, SLIT, subcutaneous immunotherapy, sublingual immunotherap
Liquid Scintillator Time Projection Chamber Concept
Results are presented from a small-scale experiment to investigate the use of
room temperature organic liquid scintillators as the active medium for a time
projection chamber (TPC). The optical properties of liquid scintillators have
long been known, but their ability to transport charge has remained, until now,
largely untested. The idea of using room temperature liquids as an active
medium for an ionisation chamber was first presented in \cite{EnglerTMS}. Since
then the range of liquid scintillators available has been greatly developed. We
present successful transport of ionization charges in a selection of both, pure
organic liquid solvents and liquid scintillator cocktails over 20mm using a
variety of electric drift field strengths. The target of this research is to
offer a cost effective alternative to liquid noble gas detectors in neutrino
physics.Comment: 6 pages, 5 figures, submitted to Proceedings 12th Pisa Meeting on
Advanced Detectors, La Biodola, Isola d'Elba, Ital
A Pseudolikelihood Approach for Simultaneous Analysis of Array Comparative Genomic Hybridizations (aCGH)
DNA sequence copy number has been shown to be associated with cancer development and progression. Array-based Comparative Genomic Hybridization (aCGH) is a recent development that seeks to identify the copy number ratio at large numbers of markers across the genome. Due to experimental and biological variations across chromosomes and across hybridizations, current methods are limited to analyses of single chromosomes. We propose a more powerful approach that borrows strength across chromosomes and across hybridizations. We assume a Gaussian mixture model, with a hidden Markov dependence structure, and with random effects to allow for intertumoral variation, as well as intratumoral clonal variation. For ease of computation, we base estimation on a pseudolikelihood function. The method produces quantitative assessments of the likelihood of genetic alterations at each clone, along with a graphical display for simple visual interpretation. We assess the characteristics of the method through simulation studies and through analysis of a brain tumor aCGH data set. We show that the pseudolikelihood approach is superior to existing methods both in detecting small regions of copy number alteration and in accurately classifying regions of change when intratumoral clonal variation is present
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