Aircraft observations

This thesis investigates the SPH capability available in the commercial Finite Element (FE) code LS-DYNA®, for water impact problems. Experiments have been conducted on rigid wedges impacting water, which were then simulated with the SPH method. Although certain limitations were experienced with the experimental results, a positive correlation was observed with the numerical technique, thus establishing SPH as a promising method for crashworthiness design.

176p runthenight07 01-03-2023 4 2   Download

Aircraft crew are one of the groups of radiation workers which receive the highest annual exposure to ionizing radiation. Validation of computer codes used routinely for calculation of the exposure due to cosmic radiation and the observation of nonpredictable changes in the level of the exposure due to solar energetic particles, requires continuous measurements onboard aircraft.

12p vironald 15-12-2022 7 2   Download

Ebook "Annex 3 to the convention international civil aviation civil aviation: Meteorological service for international air navigation" present the content general provisions, world area forecast system and meteorological offices, meteorological observations and reports, aircraft observations and reports, sigmet and airmet information, aerodrome warnings and wind shear warnings and alerts, aeronautical climatological information, information for air traffic services, search and rescue services and aeronautical information services...

208p kethamoi8 09-10-2020 22 1   Download

For over three months No. 3 Squadron had been occupied daily in ranging the heavy guns which night after night crept into their allotted positions in front of Albert. On July 1st 1916 the Somme offensive opened with gas and smoke and a bombardment of unprecedented severity. To the pilots and observers in an artillery squadron the beginning of this battle brought a certain relief, for we were rather tired of flying up and down, being shot at continually by fairly accurate and remarkably well hidden anti-aircraft batteries, while we registered endless guns on uninteresting points.

120p believe11 23-02-2013 37 6   Download

The mission of the Office of Naval Research (ONR) is to maintain a close relationship with the research and development community to support long-range research, foster discovery, nurture future generations of researchers, produce new technologies that meet known naval requirements, and provide innovations in fields relevant to the future Navy and Marine Corps. Accordingly, ONR supports research activities across a broad range of scientific and engineering disciplines.

71p mnemosyne75 02-02-2013 57 4   Download

are of high scientific and technical quality, ONR requires that each of its departments undergo an annual review (with a detailed focus on about one-third of the reviewed department’s programs). The Aircraft Technology Program reviewed in this report resides within the Strike Technology Division (Code 351) of the Naval Expeditionary Warfare Science and Technology Department (Code 35) of ONR.

0p camnhung_1 14-12-2012 46 3   Download

The large loss effect that we report reinforces the findings of Kamstra, Kramer, and Levi (2000), who document a stock market effect of similar magnitude in response to the daylight saving clock change. While Pinegar (2002) argues that the “daylight saving anomaly” is sensitive to outliers, our effect remains economically and statistically significant even after removing outliers in the data and applying a number of robustness checks. Another contribution of this paper is that we are able to go a long way towards addressing the main disadvantage of the event approach.

56p bocapchetnguoi 05-12-2012 58 2   Download