8 research outputs found
Digital SLIFER Recorder, Model A. [Underground nuclear explosions]
No full textThe Digital SLIFER Recorder (DSR) is an instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker, and recording is initiated by an increase in the frequency of the signal. The primary purpose of this instrument is to record data from the SLIFER system. The DSR records 512 samples after the record trigger signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms). The measurement essentially uses a 20-cycle period-averaging counter technique
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Hardware design document for the Infrasound Prototype for a CTBT IMS station
No full textThe Hardware Design Document (HDD) describes the various hardware components used in the Comprehensive Test Ban Treaty (CTBT) Infrasound Prototype and their interrelationships. It divides the infrasound prototype into hardware configurations items (HWCIs). The HDD uses techniques such as block diagrams and parts lists to present this information. The level of detail provided in the following sections should be sufficient to allow potential users to procure and install the infrasound system. Infrasonic monitoring is a low cost, robust, and effective technology for detecting atmospheric explosions. Low frequencies from explosion signals propagate to long ranges (few thousand kilometers) where they can be detected with an array of sensors
SLIFER Decipher
No full textThe SLIFER Decipher (SD) is a digital instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker. The primary purpose of this instrument is to reduce data recorded on magnetic tape from the SLIFER system used in underground nuclear tests. The SD records 512 samples after the fiducial signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms). The measurement essentially uses a 20-cycle period-averaging counter technique
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Test report for the infrasound prototype: For a CTBT IMS station
No full textThis document describes the results of the Comprehensive Test Ban Treaty (CTBT) Infrasound Prototype Development Test and Evaluation (DT&E). During DT&E the infrasound prototype was evaluated against requirements listed in the System Requirements Document (SRD) based on the Conference on Disarmament/Ad Hoc Committee on a Nuclear Test Ban/Working Papers 224 and 283 and the Preparatory Commission specifications as defined in CTBT/PC/II/1/Add.2, Appendix X, Table 5. The evaluation was conducted during a two-day period, August 6-7, 18997. The System Test Plan (STP) defined the plan and methods to test the infrasound prototype. Specific tests that were performed are detailed in the Test Procedures (TP)
和牛の産肉能力育種
No full textJapanese native cattle, including improved breeds, are generally called "Wagyu". They have been kept for one thousand or more years in Japan and used as cultivating and transporting labour. Some of them had been crossbred by European breeds in the late 19 th century or in the first decade of the 20th century. They were then divided into four breeds, namely Japanese Black, Japanese Brown, Japanese Poll and Japanese Shorthorn. Some of the breeds have included many line bred strains. Since about 1960 their use has been limited to the beef only, for their role of labour have been replaced by cultivating machines, breding of the beef producing character in "Wagyuu" cattle had started then. Official progeny tests and performance tests of sires have rapidly improved daily gain and meat quality. But the results of official progeny tests have not accurately represent-ed the genetic ability of sires, which are show in the least-squares analysis of variance for marketing carcass of the sons. It is necessary to collect much date from marketing carcasses, in order to genetically analyse the data and to select sires using the results of this analysis. Heritability estimates and genetic correlation calculated by many workers in Japan were summarized in this paper. In Japan, the unit price of the carcass varies greatly according to the marbling score ; therefore, most cows are tend to be mated to sires that have proved their excellent marbling ability. Most of these sires are the offsprings of only limmited sires belonging to a few strains. It is feared that a cow in a few generations might be related to every potential, desirable mate. Inbreeding depression might delay improvement. Then the author recommends to developing several strains in "Wagyu" cattles, and to mate them rotationally
Breeding in "Wagyu" Cattle as Improved Beef Breeds
No full textJapanese native cattle, including improved breeds, are generally called "Wagyu". They have been kept for one thousand or more years in Japan and used as cultivating and transporting labour. Some of them had been crossbred by European breeds in the late 19 th century or in the first decade of the 20th century. They were then divided into four breeds, namely Japanese Black, Japanese Brown, Japanese Poll and Japanese Shorthorn. Some of the breeds have included many line bred strains. Since about 1960 their use has been limited to the beef only, for their role of labour have been replaced by cultivating machines, breding of the beef producing character in "Wagyuu" cattle had started then. Official progeny tests and performance tests of sires have rapidly improved daily gain and meat quality. But the results of official progeny tests have not accurately represent-ed the genetic ability of sires, which are show in the least-squares analysis of variance for marketing carcass of the sons. It is necessary to collect much date from marketing carcasses, in order to genetically analyse the data and to select sires using the results of this analysis. Heritability estimates and genetic correlation calculated by many workers in Japan were summarized in this paper. In Japan, the unit price of the carcass varies greatly according to the marbling score ; therefore, most cows are tend to be mated to sires that have proved their excellent marbling ability. Most of these sires are the offsprings of only limmited sires belonging to a few strains. It is feared that a cow in a few generations might be related to every potential, desirable mate. Inbreeding depression might delay improvement. Then the author recommends to developing several strains in "Wagyu" cattles, and to mate them rotationally
