<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>DETECTION AND ASSESSMENT OF SECONDARY SONIC BOOMS IN NEW ENGLAND</title>
      <link>https://trid.trb.org/View/162192</link>
      <description><![CDATA[This report documents the results of a secondary sonic boom detection and assessment program conducted by the U.S. Dept. of Transportation, Transportation Systems Center in New England during the summer of 1979. Measurements of both acoustic and infrasonic signals were made. Measurement data and ray trace computations demonstrate that the secondary sonic booms frequently reported by New England residents are created by the Concorde passenger flight off the New England coast enroute to Kennedy Airport in New York City. Signal amplitudes show side fluctuations from flight to flight, from day to day, and with geographic locations. A brief set of measurements made in Applebachsville PA, show a similar day to day variability and are correlated with Concorde flights into Dulles Airport in Virginia.]]></description>
      <pubDate>Wed, 11 Dec 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/162192</guid>
    </item>
    <item>
      <title>STATUS OF REPRESENTATIVE TWO-DIMENSIONAL MODELS OF THE STRATOSPHERE AND TROPOSPHERE AS OF MID-1978</title>
      <link>https://trid.trb.org/View/82911</link>
      <description><![CDATA[This paper reviews ongoing efforts aimed at solution of basic problems dealing with ozone chemistry and atmospheric mass transports in representative two-dimensional (altitude and latitude) photochemical models of the troposphere and stratosphere. Emphasis is placed on the impact of recent measurements of the reaction rate coefficients for HO2 + NO yields OH + NO2 and HO2 + 03 yields OH + 2 02 on: (a) the balance between ozone production and destruction on both ozone concentrations and columns at middle northern latitudes during summer for an oxygen-hydrogen-nitrogen atmosphere; (b) calculation of NO sub x concentrations in the upper troposphere which are important for the effects of high-altitude subsonic flight on the ozone column; and (c) estimates of the tropospheric NO sub x and OH concentrations as well as the removal rates of water-soluble species in the lower troposphere from considerations of the tropospheric ozone and carbon monoxide budgets. The severe limitations of arbitrary extensions of available 2-D parameterizations of the dynamics to an upper troposphere and lower stratosphere assumed to be perturbed by large emissions of engine effluents are brought out from numerical solutions of the primitive equations for instantaneous and continuous sources of inert material in the lower stratosphere. The paper includes preliminary 2-D results based on the revised ozone chemistry for the trend of subsonic and supersonic flight effects ozone.]]></description>
      <pubDate>Sun, 30 Jun 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/82911</guid>
    </item>
    <item>
      <title>CONTENT ANALYSIS OF MASS MEDIA COVERAGE OF CONCORDE MAY 1976 - FEBRUARY 1977</title>
      <link>https://trid.trb.org/View/88537</link>
      <description><![CDATA[Data were produced from observation of 16 broadcast and print media outlets representing areas both affected and unaffected by flights of the Concorde airplane. All monitored stories concerning the Concorde were coded on two major classes or variables: Prominence and Assertions. A third variable, Strength-Direction, was derived from these two. Statistical analyses of the resulting data indicated that Concorde coverage involved both a local issue orientation and a national issue one. The media monitored presented significantly more prominent negative assertions about Concorde than positive assertions. Unaffected area newspapers were significantly negative while affected area newspapers were not. (Author)]]></description>
      <pubDate>Tue, 31 Jul 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/88537</guid>
    </item>
    <item>
      <title>ADVANCED ENVIRONMENTAL COOLING CONCEPTS FOR SUPERSONIC AIRCRAFT</title>
      <link>https://trid.trb.org/View/76747</link>
      <description><![CDATA[A study was conducted to compare the operating penalty of advanced closed-loop and regenerative open-loop air cycle concepts using fuel heat sinks with current technology bootstrap air cycle systems utilizing ram air heat sinks. The results indicate substantial reductions in fuel operating penalty can be attained with associated lower aircraft design gross weight.]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/76747</guid>
    </item>
    <item>
      <title>ANALYTICAL STUDIES OF SOME ACOUSTIC PROBLEMS OF JET ENGINES</title>
      <link>https://trid.trb.org/View/49057</link>
      <description><![CDATA[The propagation and generation of acoustic waves in a choked nozzle is considered where pressure and entropy fluctuations caused by gas stream non-uniformities like 'hot spots,' are incident on the nozzle entrance. A novel noise-generation mechanism is found which produces acoustic waves of strength proportional to the entrance entropy fluctuation and local gradient of the mean flow velocity. A transformation is introduced which relates the solutions of problems involving the propagation of acoustic waves in a moving medium to the solutions of associated problems in a stationary medium. The method is described by discussing the Sommerfeld problem for a half plane in a subsonic flow. For supersonic case, all the diffraction problems are related to a single reference problem. A decomposition of the pressure field in a 'geometrical optics' field and a diffracted field is given, showing some remarkable similarities to the subsonic solution. The radiation of acoustic modes from a duct immersed in a subsonically moving medium is treated by a similar transformation. The presence of the uniform flow has roughly the same effect as, an increase in frequency of the incident wave, at constant mode number. The effect of acoustical lining on the radiation pattern is examined, and side radiation is shown to be greatly reduced for the lower order modes.]]></description>
      <pubDate>Thu, 22 Jun 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/49057</guid>
    </item>
    <item>
      <title>ANTONIO FERRI SELECTED PAPERS ON ADVANCED DESIGN OF AIR VEHICLES</title>
      <link>https://trid.trb.org/View/57866</link>
      <description><![CDATA[This publication contains a selection of ten papers by Professor Antonio Ferri, who died in 1976 after many years association with AGARD. These papers are concerned with the advanced design of air vehicles. They are published to bring together in one place examples of Professor Ferri's most important contributions to aerospace research and development. A biography of Professor Ferri is included, together with a bibliography of his works, and tributes from his friends and colleagues.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57866</guid>
    </item>
    <item>
      <title>CERTAIN CONCLUSIONS ON THE SUPERSONIC TRANSPORT AIRCRAFT BOOM</title>
      <link>https://trid.trb.org/View/63283</link>
      <description><![CDATA[The report discusses the bearable limit of the boom, the mechanical effects on structures, and the physiological effects on humans and animals.]]></description>
      <pubDate>Sun, 16 Jan 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/63283</guid>
    </item>
    <item>
      <title>TEST AND EVALUATION OF A REAL-TIME SIMULATED TRANSCONTINENTAL SUPERSONIC BOOMLESS FLIGHT SYSTEM. VOLUME I. MAIN TEXT AND APPENDIX A</title>
      <link>https://trid.trb.org/View/29210</link>
      <description><![CDATA[In the investigation reported, numerical methods simulated supersonic flight carried out in real-time and concurrently at present time. A computer program identifies, acquires, analyzes and predicts the information needed in order to plan, fly and verify boomless flight. It optimizes the cut-off Mach time-gain in trade-off along with other pertinent necessary considerations now being regularly carried out in the advanced air operations of today. For communication information in current real-time for boomless transcontinental flights, the investigation utilized nationwide networks: ARINC, UNINET. The program foresees the future conditions affecting the cut-off Mach flight performance in sufficient time for carrying out reliable preflight planning and for monitoring the in-flight modifications just ahead of the aircraft, utilizing the appropriate prediction of atmospheric conditions (boom-ahead computer).]]></description>
      <pubDate>Fri, 05 Nov 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/29210</guid>
    </item>
  </channel>
</rss>