| 1. |
- Leisawitz, David, et al.
(författare)
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The Origins Space Telescope: Mission concept overview
- 2018
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Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. ; 10698
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Konferensbidrag (refereegranskat)abstract
- Downloading of the abstract is permitted for personal use only. The Origins Space Telescope (OST) will trace the history of our origins from the time dust and heavy elements permanently altered the cosmic landscape to present-day life. How did the universe evolve in response to its changing ingredients? How common are life-bearing planets? To accomplish its scientific objectives, OST will operate at mid- and far-infrared wavelengths and offer superlative sensitivity and new spectroscopic capabilities. The OST study team will present a scientifically compelling, executable mission concept to the 2020 Decadal Survey in Astrophysics. To understand the concept solution space, our team studied two alternative mission concepts. We report on the study approach and describe both of these concepts, give the rationale for major design decisions, and briefly describe the mission-enabling technology.
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| 2. |
- Meixner, Margaret, et al.
(författare)
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Overview of the Origins Space telescope: Science drivers to observatory requirements
- 2018
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Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. ; 10698
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Konferensbidrag (refereegranskat)abstract
- The Origins Space Telescope (OST) mission concept study is the subject of one of the four science and technology definition studies supported by NASA Headquarters to prepare for the 2020 Astronomy and Astrophysics Decadal Survey. OST will survey the most distant galaxies to discern the rise of metals and dust and to unveil the co-evolution of galaxy and blackhole formation, study the Milky Way to follow the path of water from the interstellar medium to habitable worlds in planetary systems, and measure biosignatures from exoplanets. This paper describes the science drivers and how they drove key requirements for OST Mission Concept 2, which will operate between ∼5 and ∼600 microns with a JWST sized telescope. Mission Concept 2 for the OST study optimizes the engineering for the key science cases into a powerful and more economical observatory compared to Mission Concept 1.
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| 3. |
- Bauer, Ingrid, et al.
(författare)
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White paper on Next Generation Metrics
- 2020
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We - the writers - of this paper summarise a methodological debate amongst experts from our Members on ´traditional´ and ´next generation metrics´ for science, education and innovation in the light of the developments and expectations towards greater ´openness´ to realise long-term ecological, economic and social sustainability and benefit to citizens and to the world. A broad range of indicators from various sources were discussed in terms of feasibility in different contexts, as well as their suitability to serve diverse purposes. Rather than presenting a formal position on behalf of CESAER, we present our synthesis of this debate. In chapter one, we provide the definitions, describe the methodology used and set the scope of this paper, thus setting the scene for the following chapters. In chapter two, we report on our findings on metrics dealing with (open) science. Ever since E. Garfield’s Journal Impact Factor (JIF) came into use in the mid-70s, and certainly with the h-index proposed by the physicist J. E. Hirsch in 2005, the rise of quantitative metrics in the assessment of research has seemed to be unstoppable - up to the use of ´views´, ´likes´ and ´tweets´. While in times of accountability and competing for visibility and funds, it is only reasonable to focus on the measurability and comparability of metrics as efficient means to display performance, the limitations of doing so are obvious. As a result, in the past years, a countermovement criticising this practice and questioning the validity of the metrics and reliability of the data used has become stronger. Moreover, there are strong (political) expectations to make science more open. Metrics for (open) education and training are the topic of chapter three. In many (global) rankings of higher education institutions, the indicators used reflect the model of traditional, established, wealthy and largely English-speaking research universities (Hazelkorn, 2015). They are, therefore, ill-suited to truly give an idea about the quality or the performance of higher education more broadly, and they are limited in helping universities to set priorities. They do, however, reveal that there is still a lack of meaningful internationally comparable information on these matters. By covering (open) innovation in chapter four, we complete the discussion of the mission of our Members. Open innovation promotes approaches that boost disruptive innovation rather than incremental, stimulate inventions produced by outsiders and founders in start-ups, and is based on a view on the world of widely distributed knowledge. We synthesised our findings on the confrontation between ´traditional´ and ´next generation metrics´ and present ten each for science, education and innovation for use mainly within our Members and to monitor the desired progress over time (see annexe I). While this might be interpreted as sufficient responsiveness to external expectations on our behalf, we instead advanced further and in chapter five suggest that universities strive towards ´progressive metrics´ and highlight the need to acknowledge knowledge as a common good, promote a culture of quality, risk-taking and trust and measure the contribution to sustainability. That is why we conclude this paper with ideas for progressive indicators in annexe II, outlining an agenda for future work to stay at the forefront of science, education and innovation; to benchmark against like-minded institutions; and to pursue institutional development paths; and - ultimately - to optimise our contributions to society and the world.
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| 4. |
- Meixner, Margaret, et al.
(författare)
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Origins Space Telescope science drivers to design traceability
- 2021
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Ingår i: Journal of Astronomical Telescopes, Instruments, and Systems. - 2329-4221 .- 2329-4124. ; 7:1
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Tidskriftsartikel (refereegranskat)abstract
- The Origins Space Telescope (Origins) concept is designed to investigate the creation and dispersal of elements essential to life, the formation of planetary systems, and the transport of water to habitable worlds and the atmospheres of exoplanets around nearby K-and M-dwarfs to identify potentially habitable-and even inhabited-worlds. These science priorities are aligned with NASA's three major astrophysics science goals: How does the Universe work? How did we get here? and Are we alone? We briefly describe the science case that arose from the astronomical community and the science traceability matrix for Origins. The science traceability matrix prescribes the design of Origins and demonstrates that it will address the key science questions motivated by the science case.
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| 5. |
- Schuenemann, Verena J., et al.
(författare)
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Genome-Wide Comparison of Medieval and Modern Mycobacterium leprae
- 2013
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 341:6142, s. 179-183
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Tidskriftsartikel (refereegranskat)abstract
- Leprosy was endemic in Europe until the Middle Ages. Using DNA array capture, we have obtained genome sequences of Mycobacterium leprae from skeletons of five medieval leprosy cases from the United Kingdom, Sweden, and Denmark. In one case, the DNA was so well preserved that full de novo assembly of the ancient bacterial genome could be achieved through shotgun sequencing alone. The ancient M. leprae sequences were compared with those of 11 modern strains, representing diverse genotypes and geographic origins. The comparisons revealed remarkable genomic conservation during the past 1000 years, a European origin for leprosy in the Americas, and the presence of an M. leprae genotype in medieval Europe now commonly associated with the Middle East. The exceptional preservation of M. leprae biomarkers, both DNA and mycolic acids, in ancient skeletons has major implications for palaeomicrobiology and human pathogen evolution.
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