Spacecraft Data Storage in the 1970\u27s

In the coming decade, we can expect to see an expansion in the utilization of space vehicles for the benefit of society. System design studies for resource measurement and management, meteorology, oceanography, mapping and indeed in all areas where space technology can provide a cost effective means of gathering data on a global scale are in progress now. In the first part of the paper, the resulting growth in requirements for data storage on spacecraft is discussed, as well as the technology at hand for storing required data in the most appropriate form and at suitable input and output rates. It also suggests the most economical means of storing data in spacecraft. The second part of the paper will discuss the servo-driven tape recorder approach to meeting these requirements. It is shown that, by use of the servo approach, a very flexible and simple mechanical design can be employed having only eight rotating parts. An analysis of the servo loop response is presented and it is shown what system parameters are important in obtaining minimum flutter. The last part of the paper is concerned with processing the data before and after recording. Equalization needs for FM and digital data systems are discussed. In addition, the computer aided design approach to the analog and digital data channels of the High Data Rate Storage System for the Nimbus B and D meteorological satellite is described

J. Treadwell to B.D. Treadwell, 17 April 1837

https://egrove.olemiss.edu/aldrichcorr_a/1066/thumbnail.jp

Treadwell to Jim, 29 January 1962

Professional correspondenc

Indenture, Marshall County, MS, 5 January 1853

https://egrove.olemiss.edu/aldrichcorr_c/1108/thumbnail.jp

A Case of Fibro-Plastic Tumor of the Base of the Skull, Associated with Leucocythæmic Changes in the Blood and Several Glandular Organs

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Community Health Workers and Community Voices: Promoting Good Health

Documents how CHWs address the problems of health disparities, poor access to care, and the rising cost of health care. Examines challenges that exist in expanding current CHW programs, and policy options around finance, workforce, and delivery of care

Barriers to Pediatric Sickle Cell Disease Guideline Recommendations.

National guidelines recommend that providers counsel all patients with sickle cell anemia about hydroxyurea (HU) therapy and screen children with sickle cell anemia annually for the risk of stroke with transcranial Doppler (TCD). We surveyed a national convenience sample of sickle cell disease clinicians to assess factors associated with low adherence. Adherence was 46% for TCD screening. Low adherence was associated with a lack of outcome expectancy (eg, a belief that there would be poor patient follow-up to TCD testing; P < .05). Adherence was 72% for HU counseling. Practice barriers (eg, lack of support staff or time) and a lack of agreement with HU recommendations were associated with low adherence (P < .05). This study demonstrates that different types of strategies are needed to improve TCD screening (to address follow-up and access to testing) versus HU counseling (to address physician agreement and practice barriers)

Lunar surface engineering properties experiment definition. Volume 1: Mechanics, properties, and stabilization of lunar soils

Lunar soil simulation and stabilization, and impact penetrometer studie

Indenture, Marshall County, MS, 10 January 1851

https://egrove.olemiss.edu/aldrichcorr_c/1097/thumbnail.jp

A system for rating the stability and strength of medical evidence

BACKGROUND: Methods for describing one's confidence in the available evidence are useful for end-users of evidence reviews. Analysts inevitably make judgments about the quality, quantity consistency, robustness, and magnitude of effects observed in the studies identified. The subjectivity of these judgments in several areas underscores the need for transparency in judgments. DISCUSSION: This paper introduces a new system for rating medical evidence. The system requires explicit judgments and provides explicit rules for balancing these judgments. Unlike other systems for rating the strength of evidence, our system draws a distinction between two types of conclusions: quantitative and qualitative. A quantitative conclusion addresses the question, "How well does it work?", whereas a qualitative conclusion addresses the question, "Does it work?" In our system, quantitative conclusions are tied to stability ratings, and qualitative conclusions are tied to strength ratings. Our system emphasizes extensive a priori criteria for judgments to reduce the potential for bias. Further, the system makes explicit the impact of heterogeneity testing, meta-analysis, and sensitivity analyses on evidence ratings. This article provides details of our system, including graphical depictions of how the numerous judgments that an analyst makes can be combined. We also describe two worked examples of how the system can be applied to both interventional and diagnostic technologies. SUMMARY: Although explicit judgments and formal combination rules are two important steps on the path to a comprehensive system for rating medical evidence, many additional steps must also be taken. Foremost among these are the distinction between quantitative and qualitative conclusions, an extensive set of a priori criteria for making judgments, and the direct impact of analytic results on evidence ratings. These attributes form the basis for a logically consistent system that can improve the usefulness of evidence reviews