On the Results of a Special Experiment on the Registration of Traveling Ionospheric Disturbances by a System of Synchronously Operating Chirp Ionosondes

We present the results of observations of traveling ionospheric disturbances (TIDs) based on the data of the operation of the network of chirp oblique sounding stations of the ionosphere on 18–19 December 2019. For observations, four stations of the same type located in Vasilsursk (56.3° N; 46.08° E), Yoshkar-Ola (56.62° N; 47.87° E), Kazan (55.8° N; 49.12° E), and Nizhny Novgorod (56.32° N; 44.02° E) were used. They formed six synchronous sounding paths with lengths from 120 km to 320 km. The registration of the amplitude-frequency and distance-frequency characteristics (AFC and DFC) by the chirp oblique sounding stations was carried out every minute. Additionally, two vertical sounding stations of the ionosphere as ionosondes CADI and Cyclone (Vasilsursk and Kazan) were used. The passage of several types of TIDs has been observed. Based on the measurements of the DFC of the ionosphere, as obtained on different paths by simultaneously operated chirp stations, and ionograms obtained by vertical ionosondes, estimates of the spatial dimensions and TID velocity were made, and their direction was identified.

Problematic Flexibility as an Asset for a Thorough Reflection on Architectural Education

This paper is exploring the benefits and assets of an educational experiment without clear ownership. More specifically, it is about a form of democracy of doing in almost all the phases of a continuous exercise in the WTC1-tower in Brussels. An unintended lack of control over the different event processes led to a curious form of critical thinking about the “context” for architectural ‘schooling’, which is generally understood as necessary. The very special experiment contains many more elements than anyone could have foreseen.

The “special experiment” in languages

Purpose The Victorian School of Languages began on the margins of the Victorian education system in 1935 as a “special experiment” supported by the Chief Inspector of Secondary Schools, J.A Seitz. The purpose of this paper is to present a historical analysis of the first 15 years of the “special experiment” and it reports on the school’s fragile beginnings. Design/methodology/approach The historical analysis draws on archival materials, oral sources and other primary documents from the first 15 years of the Saturday language classes, to explore its fragile role and status within the Victorian education system. Findings The Saturday language classes were experimental in nature and were initially intended to pilot niche subjects in the languages curriculum. Despite support from influential stakeholders, widespread interest and a promising response from teachers and students, the student enrolments dwindled, especially in the war years. As fate would have it, the two languages initially established (Japanese and Italian) faced a hostile war environment and only just survived. Questions about the continuing viability of the classes were raised, but they were championed by Seitz. Originality/value To date, this is one of few scholarly explorations of the origins of the Victorian School of Languages, a school which became a model for Australia’s other State Specialist Language Schools. This paper contributes to the literature about the VSL, a school that existed on the margins but played a pioneering role in the expansion of the language curriculum in Victoria.

Study of the object of the natural-technical system and determination of the static characteristics of ventilation

The article describes the analysis of the operation of existing production facilities for the extraction and processing of deposits. The study of the effective functioning of the natural-technical system in the extraction of a useful component of deposits is an extremely urgent and promising task. The purpose of the research is to study the object of the natural-technical system and determine the type of static ventilation characteristics. The tasks will be solved on the basis of a comprehensive study of the object of the natural-technical system. Experimental data necessary for constructing static characteristics associated with conducting a special experiment on the production site that violates the normal mode of ventilation is obtained. The research and development of a method for determining the static characteristics of ventilation objects, according to normal operation, which are obtained without interrupting the technological process of extracting the useful component.

Spectral characteristics and scatter cross-section of low latitude mesospheric echoes measured by the Indian MST radar at Gadanki

In November 2008 and in March and April 2009 the Indian MST radar (53 MHz) at Gadanki was operated during the daytime in a special experiment, with 600 m altitude resolution, for understanding the characteristics of low-latitude mesospheric echoes (LLME). The data of three days when the echoes were strongest have been analysed in terms of spectral widths and radar volume reflectivities. Spectral widths of LLME show some decrease with altitude, with median values of 4–6 m s−1 at 69–72 km and of 2–4 m s−1 at 73–78 km. This corresponds to 20–200 mW kg−1 turbulent energy dissipation rates. It has been shown that stronger echoes have broader spectra consistent with a turbulent scattering mechanism. For the first time, the volume reflectivities for the strong LLME for Gadanki have also been calculated. They are in the range of 10−17–10−15 m−1, so LLME at Gadanki are somewhat stronger than those reported so far from Jicamarca, Peru (Lehmacher et al., 2009).

Research of Laser Shock Processing

This paper analyzes the actual requirements for the laser in laser shock processing. A laser used in laser shock processing for special experiment is designed and main performance of the laser has been tested.