261 research outputs found
Dataset on the bearing capacity of curved profiles obtained by roll forming process
No full textThe paper shows experimental data concerning the bearing capacity of curved profile sheets achieved by roll forming process.
Two different restraint configurations were considered, respectively named A and B and representing the only bending and the axial-bending conditions. Two different experimental setup, i.e. single span with and without horizontal restraints were adopted. Trapezoidal and sinusoidal steel sheets with variable thickness and curvature radius were tested. Setup configurations, collapse
mechanisms and load-deflection diagrams are presented
ANÁLISIS PSICOMÉTRICO DEL "TEST DE FLUIDEZ DE DISEÑOS DE RUFF" EN POBLACIÓN UNIVERSITARIA DE BOGOTÁ
No full textExecutive function is the construct that comprises the spectrum of cognitive abilities that enable the individual to anticipate, initiate, provide feedback to the behavior and have cognitive flexibility. One of the useful tests to assess this function is the Ruff Figural Fluency Test which measures visuomotor programming and is associated with right frontal activity. In Colombia this test has not been validated with adult population, and considering the usefulness of this instrument for assessing people with neurological injury, the need to carry out a study to analyze the feasibility of using this test both in research and clinical practice was raised. The overall objective was to conduct a psychometric analysis of the Ruff Test with university population in Bogotá. The study was descriptive, of instrumental type. Participants were 492 university students, men and women, aged between 18 and 28 years, enrolled in seven universities of the city of Bogotá. The internal consistency analysis yielded a Cronbach's alpha of 0.876. In order to establish convergent validity, the WAIS cubes subtest was used, and a correlation of 0.24 was found, with p = 0.001. Factor analysis yielded four factors, three of which coincide with the studies conducted by the author of the test. The fourth factor found was related with following directions. Sex differences were found in the unique designs factor, where women obtained a higher average than men
90 Jahre Stahlbau an der Versuchsanstalt in Karlsruhe
No full textDie Berufung von Prof. Dr.-Ing. Ernst Gaber an die Technische Hochschule Karlsruhe im Jahr 1921 markierte den Startschuss des Prüfraum Gaber, aus dem später die Versuchsanstalt für Stahl, Holz und Steine hervorging. Heute ist die Versuchsanstalt Teil des Karlsruher Instituts für Technologie (KIT) und besteht aus den Abteilungen Holzbau und Baukonstruktionen sowie Stahl- und Leichtbau. Im Beitrag wird auf die Geschichte dieser Einrichtung in Bezug auf den Fachbereich Stahlbau zurückgeblickt
Method of Making Mattresses.
No full textPatent for a new and improved method of making mattresses. This invention "consists in first disintegrating the material and simultaneously forcing the same into a suitable receptacle, fanning said material as it passes into the receptacle, and finally compressing the same . . . thereby dispensing with tacking of the bat" (lines 15-22)
Qualifying Eurofighter Aircrew Synthetic Training Aids as Full Flight Simulator Level C/D
No full textThe German Air Force uses ASTA flight simulators for training and testing of Eurofighter pilots. This study aimed to determine whether the ASTA simulator meets the requirements for the subjective test of certification and whether the pilots consider ASTA a realistic training tool. 118 of a total of 130 Eurofighter pilots participated in the study and were asked to answer a questionnaire after flying a certification-type mission profile. Nine hypotheses were tested with inferential and descriptive statistics, the results led to four conclusions. First, the ASTA is perceived as a high-fidelity training simulator that confidently replicates the Eurofighter. Therefore second, the ASTA simulator’s qualification process to an FFS C/D should be initiated. Third, motion systems do not seem indispensable for the transferability of simulation; thus finally, the rulemaker’s qualification requirements to approve FFS C/D simulators should be updated to include ASTA type simulators
Qualifying Eurofighter Aircrew Synthetic Training System as FFS-C/D Simulator
No full textThe German Air Force uses ASTA flight simulators for training and testing of Eurofighter pilots. This study aimed to determine whether the ASTA simulator meets the requirements for the subjective test of certification and whether the pilots consider ASTA a realistic training tool. 118 of a total of 130 Eurofighter pilots participated in the study and were asked to answer a questionnaire after flying a certification-type mission profile. Nine hypotheses were tested with inferential and descriptive statistics, the results led to four conclusions. First, the ASTA is perceived as a high-fidelity training simulator that confidently replicates the Eurofighter. Therefore second, the ASTA simulator’s qualification process to an FFS C/D should be initiated. Third, motion systems do not seem indispensable for the transferability of simulation; thus finally, the rulemaker’s qualification requirements to approve FFS C/D simulators should be updated to include ASTA type simulators
Nut Lock.
No full textPatent for a nut lock for use on vehicle axles, which is easily taken on and off
Scientometric Portrait of Homi Jehangir Bhabha: The Father of Indian Nuclear Research Programme
No full textQuantitative and qualitative analysis with graphic representation of the publication productivity of a scientist facilitates easy and clear perception about the work of a scientist. Bhabha’s scientific work spanned over more than three decades (1933-1967) during which he published 104 publications, which could be classified into nine fields: Interaction of Radiation with Matter (4), Quantum Electrodynamics (5), Mathematical Physics (2), Cosmic Ray Physics (18), Elementary Particle Physics (14), Field Theory (15), General Physics (2), Nuclear Physics (4) and General (40). The highest number of publications (6) were published in 1941, 1945 and 1964 respectively. The average number of publications published per year was 3.05. His productivity coefficient was 0.05 which is a clear indicates that his publication productivity was quite consistent throughout his scientific career. He was single author in 79 of his publications and the main author in 24 publications indicates that he always preferred to work himself and lead the team as ‘mentor’. Bhabha had 22 collaborators during the period. Team of research collaborators working with a successful scientist documents the sociological aspect of history of science while generating knowledge by a leader in a domain.
Bhabha became a citable author in 1937. Bhabha received 1211 citations to his 30 publications out of 104 publications. Out of 104, 74 publications did not receive any citations. Out of 74 publications, 40 publications dealt subjects mainly of general interest. Bhabha’s 86.66 percent of cited publications received their first citations within four years of their publication indicates that his publications were noticed immediately and had direct impact among the fellow researchers working all over the world. His overall citation rate was 11.64 per cited publication. The highest citations 389 were received to the domain ‘Cosmic ray physics’. The highest number of citations received were 45 in 1938. His self-citations were only 24 (1.98%) and citations by others were 1187 (98.02%). The highest self citations were six in 1946. Bhabha’s mean diachronous self-citation rate was 1.98. The highest citation rate 28.4 was to the domain ‘Quantum electrodynamics. His single authored publications have received the highest number 863 (71.26%) of citations. Bhabha’s five publications have been cited more than 100 times each. His publications have been cited by the authors working in various diverse fields like nuclear physics, mathematical physics, instrumentation, optics, geophysics and geochemistry, condensed matter physics, applied physics, electrical and electronic engineering, mechanical engineering etc., indicating a very diverse influence and impact of Bhabha’s publications. Bhabha’s publications have also been cited by the Nobel laureates like V. L. Ginzberg, Wolfgang Pauli, H. A. Bethe, M. Born, W. Bothe, E. P. Wigner, H. Yukawa, P. M. S. Blackett and C. N. Yang which is an indication of his originality of ideas and high quality of publications
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