43,419 research outputs found
Navigating to the Moon along low-energy transfers
No full textThis paper presents a navigation strategy to fly to the Moon along a Weak Stability Boundary transfer trajectory. A particular strategy is devised to ensure capture into an uncontrolled relatively stable orbit at the Moon. Both uncertainty in the orbit determination process and in the control of the thrust vector are included in the navigation analysis. The orbit determination process is based on the definition of an optimal filtering technique that is able to meet accuracy requirements at an acceptable computational cost. Three sequential filtering techniques are analysed: an extended Kalman filter, an unscented Kalman filter and a Kalman filter based on high order expansions. The analysis shows that only the unscented Kalman filter meets the accuracy requirements at an acceptable computational cost. This paper demonstrates lunar weak capture for all trajectories within a capture corridor defined by all the trajectories in the neighbourhood of the nominal one, in state space. A minimum Delta v strategy is presented to extend the lifetime of the spacecraft around the Moon. The orbit determination and navigation strategies are applied to the case of the European Student Moon Orbiter
The reception of W. Somerset Maugham's works
Full text linkTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão.Este trabalho objetiva estudar a posição do romancista inglês W. Somerset Maugham na literatura contemporânea de seu país. Se por um lado Maugham nunca foi definitivamente rotulado como um simples escritor de best-sellers, por outro lado nunca lhe foi atribuído o status de grande escritor. Ele se mantém numa espécie de posição ambígua na literatura inglesa. Reforçando essa situação há ainda o fato de que alguns de seus romances, embora tenham sido tão populares, na época de seu lançamento, quanto os modernos best-sellers têm experimentado uma duração que não é usual nesse tipo de literatura. Ao analisar a recepção crítica de seis de seus romances, um de cada fase de sua carreira literária, baseado em alguns princípios da estética da recepção de Hans Robert Jauss, nós identificamos os elementos que foram especialmente relevantes na definição do status literário de Maugham. Além disso, conforme ainda é previsto na teoria de Jauss, nós também apontamos algumas mudanças de interesse nos estudos literários que indicam um ressurgimento e possivelmente uma reavaliação da obra de Maugham no futuro
Moon Phases, Mood and Stock Market Returns: International Evidence
No full textWe employ recent data from 59 international emerging and mature stock markets to provide new evidence of a lunar cycle (full and new moon) effect on their stock market returns. Using a TGARCH model, we further examine the linkages between efficient-market theory, calendar-related effects and investors' mood resulted from moon phases. The empirical results show significant full moon effects in 6 markets, and significant new moon effects in 8 markets. In line with the theory, we report significant positive effect of new moon on stock market returns in 5 cases (UK, Switzerland, Bangladesh, Chile and Cyprus), while a negative effect of full moon is reported for the case of Jordan only. In addition, we find that lunar effects are strongly influenced by the calendar anomalies (Monday effect and January effect); several markets -mostly emerging markets- show evidence of full/new moon effects as well as Monday/January effects (Bangladesh, Brazil, Chile, Tunisia, Belgium, Cyprus). Further, we prove that the lunar phases are stronger outside America. These findings are recommended to investors, financial managers and analysts dealing with international stock indices
On the survivability and detectability of terrestrial meteorites on the moon
Full text linkMaterials blasted into space from the surface of early Earth may preserve a unique record of our planet's early surface environment. Armstrong et al. (2002) pointed out that such materials, in the form of terrestrial meteorites, may exist on the Moon and be of considerable astrobiological interest if biomarkers from early Earth are preserved within them. Here, we report results obtained via the AUTODYN hydrocode to calculate the peak pressures within terrestrial meteorites on the lunar surface to assess their likelihood of surviving the impact. Our results confirm the order-of-magnitude estimates of Armstrong et al. (2002) that substantial survivability is to be expected, especially in the case of relatively low velocity (ca. 2.5 km/s) or oblique (≤45°) impacts, or both. We outline possible mechanisms for locating such materials on the Moon and conclude that searching for them would be a scientifically valuable activity for future lunar exploration
A 3D hybrid simulation study of the electromagnetic field distributions in the lunar wake
No full textAs a consequence of its lack of a thick atmosphere and an ionosphere,
the interaction of the solar wind with the Moon is characterized
by the direct impact of the solar wind on its sunward
hemisphere. This absorption effect produces a near-vacuum in the
wake immediately behind the Moon. The absence of a global magnetosphere
and the low electrical conductivity further leads to the
free passage of the interplanetary magnetic field (IMF) through the
lunar interior. This classic scenario of the solar wind�Moon interaction
was established by the very first plasma measurements in the
lunar environment made by the Explorer 35 spacecraft (Lyon et al.,
1967; Schubert and Lichtenstein, 1974). The wake region is gradually
filled in by the diffusion of solar wind protons into the zone of
density depletion. As described in the early analyses by Michel
(1968) and Whang and Ness (1970), the expansion of the solar wind
plasma into the wake is accompanied by rarefaction waves. At the
same time, the magnetometer experiment on Explorer 35 detected
the existence of a field reduction zone at the wake boundary surrounding
the central region, with magnetic field enhancement up
to a factor of 1.4 in comparison to the value in the ambient solar
wind (Colburn et al., 1967). Some of these features were repeatedly
observed at different distances in the lunar wake by the Win
Towards an integrated scientific and social case for human space exploration
No full textI will argue that an ambitious programme of human space exploration, involving a return to the Moon, and eventually human missions to Mars, will add greatly to human knowledge. Gathering such knowledge is the primary aim of science, but science's compart-mentalisation into isolated academic disciplines tends to obscure the overall strength of the scientific case. Any consideration of the scientific arguments for human space exploration must therefore take a holistic view, and integrate the potential benefits over the entire spectrum of human knowledge. Moreover, science is only one thread in a much larger overall case for human space exploration. Other threads include economic, industrial, educational, geopolitical and cultural benefits. Any responsibly formulated public space policy must weigh all of these factors before deciding whether or not an investment in human space activities is scientifically and socially desirable
W. D. Snodgrass, 1st Annual Arts Reunion
No full textW. D. Snodgrass is currently the Visiting Writer at Old Dominion University. He is the author of Heart\u27s Needle, After Experience, and The Fuhrer Bunker, as well as the pseudonymous book Remains. In addition to these volumes of poetry. Mr. Snodgrass has published a collection of critical essays In Radical Pursuit and several translations. In 1967 he received the Pulitzer Prize
Perspektywy rozwoju biotechnologii w Polsce
Full text linkWażnym czynnikiem rozwoju biotechnologii w Polsce są nowoczesne badania naukowe. Artykuł Perspektywy rozwoju biotechnologii w Polsce zwraca uwagę na to, że wiedza z zakresu nauk biologicznych i medycznych przyczynia się do większej konkurencyjności zarówno ośrodków naukowych i badawczych, jak i przedsiębiorstw. Biotechnologiczne projekty naukowo–badawcze realizowane w Polsce nie tworzą jeszcze podstaw do wytwarzania produktów biotechnologicznych w takim zakresie, by polskie przedsiębiorstwa mogły konkurować na rynku międzynarodowych. Jedną z przyczyn, którą analizuje Autor w artykule, jest niewystarczające inwestowanie w rozwój nauki i wsparcie dla małych i średnich firm w sektorze biotechnologii. MSP są najważniejszym elementem rozwoju tego sektora, ponieważ koncentrują się na tworzeniu i rozwoju nowoczesnych produktów biotechnologicznych. Artykuł został podzielony na dwie części: Szanse rozwoju nowoczesnej gospodarki w Polsce bez biotechnologii oraz Edukacja i projekty B+R. Autor finalizuje rozważania, pokazując pozytywny scenariusz dla rozwoju sektora biotechnologicznego w Polsce.Biotechnology uses biological processes in the development of technology or manufacture of a product. It is forecasted that Polish biotechnology industry will exceed very quickly. The technology and science parks in Poland have invested millions Euros to build new laboratories. Polish market is fuelled by increased R&D funding, central and regional governments initiatives. The article on “Polish perspectives of biotechnology development” identifies significant factors for biotechnology project development. It also indicates the examples of government biotechnology initiatives in the world. The author focuses on the statistical analysis of the research and development projects conducted by Polish scientist in scientific laboratories. His main conclusion is that biotechnology will be very important in developing Poland, Polish universities, research and development organizations.Udostępnienie publikacji Wydawnictwa Uniwersytetu Łódzkiego finansowane w ramach projektu „Doskonałość naukowa kluczem do doskonałości kształcenia”. Projekt realizowany jest ze środków Europejskiego Funduszu Społecznego w ramach Programu Operacyjnego Wiedza Edukacja Rozwój; nr umowy: POWER.03.05.00-00-Z092/17-00
NJBankers 2015 Economic Survey: Final Analysis and Report of Survey Findings
No full textThis is the fifth annual Economic Survey. The survey inquires about national and state current economic assessments, as well as six-month projections; expectations about long-term and short-term interest rates; commercial real estate submarket and loan demand; and residential loan and refinance demand. The survey also explores real estate values, currently and expected, as well as a set of negative indicators and common obstacles to lending. The survey series probes metrics about the national, state, and banking market economies in order to better understand, and, in turn, better facilitate the growth, development, and common interests of the banking sector in the state of New Jersey. Conducted by the Bloustein Center for Survey Research (BCSR) under the direction of James Hughes, Marc Weiner and BCSR senior research specialist Orin Puniello,Conducted for New Jersey Bankers Association"January 2015
W. D. Snodgrass, 2nd Annual ODU Literary Festival
No full textW: D. Snodgrass, visiting writer at Old Dominion University during 1978, currently teaches at the University of Delaware. He is the author of four volumes of poetry: Heart\u27s Needle, After Experience, The Fuhrer Bunker, and the pseudonymous book Remains. He has also published several translations and a collection of critical essays and lectures titled In Radical Pursuit Heart\u27s Needle was awarded the 1967 Pulitzer Prize for Poetry
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