1,686 research outputs found

    The Data Processing Pipeline for the Herschel-HIFI Instrument

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    The HIFI data processing pipeline was developed to systematically process diagnostic, calibration and astronomical observations taken with the HIFI science instrumentas part of the Herschel mission. The HIFI pipeline processed data from all HIFI observing modes within the Herschel automated processing environment, as well as, within an interactive environment. A common software framework was developed to best support the use cases required by the instrument teams and by the general astronomers. The HIFI pipeline was built on top of that and was designed with a high degree of modularity. This modular design provided the necessary flexibility and extensibility to deal with the complexity of batch-processing eighteen different observing modes, to support the astronomers in the interactive analysis and to cope with adjustments necessary to improve the pipeline and the quality of the end-products. This approach to the software development and data processing effort was arrived at by coalescing the lessons learned from similar research based projects with the understanding that a degree of foresight was required given the overall length of the project. In this article, both the successes and challenges of the HIFI software development process are presented. To support future similar projects and retain experience gained lessons learned are extracted.Comment: 18 pages, 5 figure

    Library Cooperation and the Development of the North Carolina Information Network (NCIN): From the Great Depression Years to 1992

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    This article recounts the history of the development of library networks, computerization of library processes, and the uses of technology in libraries in North Carolina from the Great Depression to 1992

    THE EFFECT OF CONTRACEPTIVES ON VITAMIN C METABOLISM: SPECIAL REFERENCE ON 19 -NORTESTERONE GROUP (COMBINED ESTROGEN AND PROGESTERONE TABLETS) ON ASCORBATE METABOLISM

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    Millions of women throughout the world take oral contraceptives as a convenient method for extending intra-conceptual period, preventing unwanted pregnancies or delaying the starting of family. These contraceptive tablets, if taken regularly, offer nearly 100% protection against pregnancies and hence substantially contribute to the health and social well-being of the individual. Reports has shown that there is an interaction between the steroidal contraceptives and vitamins and thus an increased demand for healthy vitamin metabolism (1,2,2,4). It is also believed that oral contraceptives act by interfering with the normal menstrual cycle, hence normal menstrual cycles are reviewed with particular reference to ascorbate metabolism. Morese, since the ascorbate nutriture of Nigerian adults has been shown to be poo

    PAM9: COST COMPARISON OF TREATING RHEUMATOID ARTHRITIS PATIENTS WITH COX-2 INHIBITORS OR NSAIDS IN A MANAGED CARE POPULATION

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    Prevalence of chronic complications of type 2 diabetes mellitus in a secondary health centre in Niger Delta, Nigeria

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    Background: Type 2 diabetes mellitus (T2DM) in Nigeria is believed to rapidly be on the increase despite its awareness. Its related chronic complications is also expanding leading to reduction in the quality of life of patients, incurring heavy burdens to the health care system, loss of man hours from work and increasing diabetic mortality. Current information on the prevalence of chronic complications and its related clinical characteristics in Niger Delta area is scarce. The aim of this study was to determine the prevalence of chronic complications of type 2 diabetes mellitus in a secondary health Centre in Niger Delta, with the objective of relating the effect of age and gender with these complications as well as determining their glycemic control.Methods: 200 consenting adult diabetics 96 (48%) males and 104 (52%) females, who have been attending the diabetic clinics for at least 12 months, were randomly recruited for the study. Hospital records, questionnaire and laboratory investigations were used to collect the demographic, clinical data as well as values of fasting blood sugar, urea, creatinine, lipids, urine microalbumin and glycated hemoglobin for all subjects.Results: Of the 200 T2DM patients evaluated for chronic complications, 130 (65%) presented with one form of complication varying from nephropathy (58%), dyslipidemia (57%), hypertension (48%), neuropathy (14%) and retinopathy (9%) with 104 (52%) having more than two categories concurrently. chronic complications varied with gender as well as age.Conclusions: Chronic complications are common among type 2 diabetes in central hospital Warri, Nigeria. Implementation of timely and appropriate screening strategies could decrease the burden of diabetes chronic complications

    Correcting for the Effects of Interstellar Extinction

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    This paper addresses the issue of how best to correct astronomical data for the wavelength-dependent effects of Galactic interstellar extinction. The main general features of extinction from the IR through the UV are reviewed, along with the nature of observed spatial variations. The enormous range of extinction properties found in the Galaxy, particularly in the UV spectral region, is illustrated. Fortunately, there are some tight constraints on the wavelength dependence of extinction and some general correlations between extinction curve shape and interstellar environment. These relationships provide some guidance for correcting data for the effects of extinction. Several strategies for dereddening are discussed along with estimates of the uncertainties inherent in each method. In the Appendix, a new derivation of the wavelength dependence of an average Galactic extinction curve from the IR through the UV is presented, along with a new estimate of how this extinction law varies with the parameter R = A(V)/E(B-V). These curves represent the true monochromatic wavelength dependence of extinction and, as such, are suitable for dereddening IR--UV spectrophotometric data of any resolution, and can be used to derive extinction relations for any photometry system.Comment: To appear in PASP (January 1999) 14 pages including 4 pages of figures Uses emulateapj style. PASP, in press (January 1999
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