Flight calibration of compensated and uncompensated pitot-static airspeed probes and application of the probes to supersonic cruise vehicles

Static pressure position error calibrations for a compensated and an uncompensated XB-70 nose boom pitot static probe were obtained in flight. The methods (Pacer, acceleration-deceleration, and total temperature) used to obtain the position errors over a Mach number range from 0.5 to 3.0 and an altitude range from 25,000 feet to 70,000 feet are discussed. The error calibrations are compared with the position error determined from wind tunnel tests, theoretical analysis, and a standard NACA pitot static probe. Factors which influence position errors, such as angle of attack, Reynolds number, probe tip geometry, static orifice location, and probe shape, are discussed. Also included are examples showing how the uncertainties caused by position errors can affect the inlet controls and vertical altitude separation of a supersonic transport

Handling Qualities and Trajectory Requirements for Terminal Lunar Landing, as Determined from Analog Simulation

Trajectory requirements for terminal lunar landing from analog simulation of spacecraf

Analyzing the Nuclear Weapons Proliferation Risk Posed by a Mature Fusion Technology and Economy

Nuclear fusion is widely promoted as the ultimate environmentally friendly solution to the world’s energy demands. However, the medium/long-term nuclear weapons proliferation risks from a hypothetical fusion economy are rarely considered. Using risk assessment tools, this paper undertakes a trial scoping of proliferation hazards arising from fusion energy technologies, focused on the implications of a global ‘Mature Fusion Economy’ (MFE). In the medium term, an MFE could (1) facilitate construction of large, efficient, and reliable nuclear arsenals by producing tritium and the fissile materials Plutonium-239 and Uranium-233; and (2) erode the barriers constraining nuclear weapons acquisition by facilitating the spread of nuclear knowledge, technologies, and materials. Given the potential scale of a global MFE, management via monitoring of proliferation and diplomacy could become unworkable. Therefore, policy development must include independent and comprehensive expert and informed community assessment of such fusion-enhanced risks, transparent oversight by the nuclear disarmament community, and systematic analysis of the issues raised in this paper and their implications for fusion into the very long-term future

Washington State Normal School Ellensburg, Washington. Public School Teaching as a Profession

https://digitalcommons.cwu.edu/catalogs/1067/thumbnail.jp

Nosocomial Infections among Pediatric Patients with Neoplastic Diseases

Background. Pediatric patients with neoplastic diseases are more likely to develop nosocomial infections (NIs). NIs may prolong their hospital stay, and increase morbidity and mortality. Objectives. The objectives of this study were to determine: (1) the incidence of NIs, (2) sites of NIs, (3) causal organisms, and (4) outcomes of NIs among pediatric patients with neoplastic diseases. Methods. This study was a prospective cohort study of pediatric patients with neoplastic diseases who were admitted to the Chiang Mai University Hospital, Thailand. Results. A total of 707 pediatric patients with neoplastic diseases were admitted. Forty-six episodes of NIs in 30 patients were reported (6.5 NIs/100 admission episodes and 7 NIs/1000 days of hospitalization). Patients with acute lymphoblastic leukemia had the highest number of NIs (41.3%). The most common causal organisms were gram-negative bacteria (47.1%). Patients who had undergone invasive procedures were more likely to develop NIs than those who had not (P < .05). The mortality rate of patients with NIs was 19.6%. Conclusion. Pediatric patients with neoplastic diseases are more likely to develop NIs after having undergone invasive procedures. Pediatricians should be aware of this and strictly follow infection control guidelines in order to reduce morbidity and mortality rates related to NIs

Technical Report: Observations and reanalyses data: comparison and trends in Southeast Asia

Reanalyses data sets, being temporally and spatially complete and available on six hourly timescales, are extremely convenient to use. Real observations represent the climate system with greater fidelity than reanalyses can, given that the latter are a complicated blend of observations and models via an assimilation scheme and rely heavily on the assimilation scheme where observations are absent. Knowing whether the reanalyses data reflects real data can be difficult to establish. In this part of the report, the observed data is compared with three reanalyses data sets for the SE Asia region. We use observations from SYNOP and METAR reports. SYNOP and METAR data are, in effect, observations taken at met stations and delivered to the Global Telecommunication System (GTS). Once in the GTS, they can be archived by institutions such as those delivering weather forecasts. Access to these data via the archives is generally much easier than through the individual Met Agencies. This is particularly true in the case of a study covering multiple nation states. These datasets are described in more detail in Sections 1.1 and 1.2