Flexible format, computer accessed telemetry system

With this system, it is possible to sample and generate two or more simultaneous formats; one can be transmitted to ground station in real time, and other is stored for later transmission. Sensor output comparison data, plus information to control format, compression algorithm, and allowable degree of sensor activity, are stored in memory

Data multiplexer using a tree switch

Self-decoding FET-hybrid or integrated-circuit tree configuration uses minimum number of components and can be sequenced by clock or computer. Redundancy features can readily be incorporated into tree configuration; as tree grows in size and more sensors are included, percentage of parts that will affect given percentage of sensors steadily decreases

Epidemiology of parainfluenza virus type 3 in England and Wales over a ten-year period

We have analysed data on respiratory syneytial (RS) and parainfiuenza type 3 (PF3) viruses reported to the Communicable Disease Surveillance Centre. London, over the period 1978–87. These confirm the annual winter epidemic of RS virus and show that, in England and Wales, PF3 is a summer infection with regular yearly epidemics

Thirty Years of Turnstiles and Transport

To characterize transport in a deterministic dynamical system is to compute exit time distributions from regions or transition time distributions between regions in phase space. This paper surveys the considerable progress on this problem over the past thirty years. Primary measures of transport for volume-preserving maps include the exiting and incoming fluxes to a region. For area-preserving maps, transport is impeded by curves formed from invariant manifolds that form partial barriers, e.g., stable and unstable manifolds bounding a resonance zone or cantori, the remnants of destroyed invariant tori. When the map is exact volume preserving, a Lagrangian differential form can be used to reduce the computation of fluxes to finding a difference between the action of certain key orbits, such as homoclinic orbits to a saddle or to a cantorus. Given a partition of phase space into regions bounded by partial barriers, a Markov tree model of transport explains key observations, such as the algebraic decay of exit and recurrence distributions.Comment: Updated and corrected versio

Submicrosecond time transfer between the United States, United Kingdom, and Australia via satellite

During 1972 time transfer experiments were run between the U.S. Naval Observatory and the Royal Greenwich Observatory and, in 1973, between the U.S. Naval Observatory and the Division of National Mapping in Canberra, Australia. In both cases the time transfer agent was the TIMATION 2 satellite, 1969-82B. The satellite ephemerides were computed from data provided by the Defense Mapping Agency TRANET. This net tracked the satellite's Doppler transmissions. The phase of the satellite clock was determined from knowledge of the position of the satellite and of the observer and the computed distance between the two. By monitoring the clock on successive passes the rate of the satellite clock was determined at Washington. By again monitoring the satellite clock at the distant station the satellite clock could be compared to the local clock and this local clock compared to the U.S. Naval Observatory clocks. In 1972 the RMS of observations at Greenwich deviated by approximately 1/4 microsecond from a straight line when compared to the Naval Observatory. In 1973 the observation errors at Canberra were approximately half as great

Applying The Principles Of Integrated Pest Management To Poultry Production In South Dakota

The $7 billion gross income for poultry, with the exception of the broiler chicken industry, is shared by nearly every state in the Union. Total farm income for 1977 (broilers, eggs, turkeys) showed an increase to$7.2 billion, but a regional breakdown was not available (USDA Agr. Sta., 1977). Even though many of the components for integrated pest management in poultry production are known, more specific knowledge of how best to utilize these components is needed

The Face Fly: Progress Towards Establishing an Efficient Pest Management Program

Face flies are often found in large numbers in the presence of cattle, especially on warm days. Estimates of the number of face flies are based on flies counted on the faces of cattle and are subject to a lot of variation, therefore, better sampling techniques are necessary. The distribution of the face fly in South Dakota was determined by facial counts of flies from a vehicle using binoculars, during early morning hours along highway transits in eastern and western South Dakota from June through August. Both chemical and non-chemical methods of managing this pest are discussed, as well as biological controls, sanitation methods, and traps

Digital community assets: Investigating the impact of online engagement with arts and peer support groups on mental health during COVID-19

The digitisation of mental health support has acceler- ated since the outbreak of the COVID-19 pandemic. This study investigated the impact of digital engagement with community assets on mental health during COVID- 19. Digital engagement is typically not location-bound, but the restricted movement enforced during ‘lock- downs’ meant that people were primarily accessing digital community assets from their home environ- ments. We report findings from a study utilising two creative workshops and semi-structured interviews to investigate how support operates in and through three digital community assets; an online peer support forum, a social enterprise running regular creative challenges nationally via social media and a local in-person crea- tive arts support group. The concept of ‘more or less digital’ captures the ways that people’s experiences of digital community assets extend beyond the platforms to incorporate settings of use. The analysis identifies how support is diluted through digital engagement, the value of minimal and muted forms of engagement and user-led designs for future hybrid forms of support. The article concludes by emphasising the importance of analysing digital community asset engagement in the settings of use and how such knowledge is vital for plan- ning support in a future under continual pressure to be increasingly digital