Design of a fulfillment pack area for a pet supply company experiencing steady growth

Includes bibliographical references

Spectral signatures of photosynthesis II: coevolution with other stars and the atmosphere on extrasolar worlds

As photosynthesis on Earth produces the primary signatures of life that can be detected astronomically at the global scale, a strong focus of the search for extrasolar life will be photosynthesis, particularly photosynthesis that has evolved with a different parent star. We take planetary atmospheric compositions simulated by Segura, et al. (2003, 2005) for Earth-like planets around observed F2V and K2V stars, modeled M1V and M5V stars, and around the active M4.5V star AD Leo; our scenarios use Earth's atmospheric composition as well as very low O2 content in case anoxygenic photosynthesis dominates. We calculate the incident spectral photon flux densities at the surface of the planet and under water. We identify bands of available photosynthetically relevant radiation and find that photosynthetic pigments on planets around F2V stars may peak in absorbance in the blue, K2V in the red-orange, and M stars in the NIR, in bands at 0.93-1.1 microns, 1.1-1.4 microns, 1.5-1.8 microns, and 1.8-2.5 microns. In addition, we calculate wavelength restrictions for underwater organisms and depths of water at which they would be protected from UV flares in the early life of M stars. We estimate the potential productivity for both surface and underwater photosynthesis, for both oxygenic and anoxygenic photosynthesis, and for hypothetical photosynthesis in which longer wavelength, multi-photosystem series are used.Comment: 59 pages, 4 figures, 4 tables, forthcoming in Astrobiology ~March 200

Spectral signatures of photosynthesis I: Review of Earth organisms

Why do plants reflect in the green and have a 'red edge' in the red, and should extrasolar photosynthesis be the same? We provide: 1) a brief review of how photosynthesis works; 2) an overview of the diversity of photosynthetic organisms, their light harvesting systems, and environmental ranges; 3) a synthesis of photosynthetic surface spectral signatures; 4) evolutionary rationales for photosynthetic surface reflectance spectra with regard to utilization of photon energy and the planetary light environment. Given the surface incident photon flux density spectrum and resonance transfer in light harvesting, we propose some rules with regard to where photosynthetic pigments will peak in absorbance: a) the wavelength of peak incident photon flux; b) the longest available wavelength for core antenna or reaction center pigments; and c) the shortest wavelengths within an atmospheric window for accessory pigments. That plants absorb less green light may not be an inefficient legacy of evolutionary history, but may actually satisfy the above criteria.Comment: 69 pages, 7 figures, forthcoming in Astrobiology March 200

God and Astrobiology

The perception that life on other planets would be, problematic for religious people, and indeed for religion itself, is a longstanding one. It is partially rooted in fact: astrobiological speculations have, on occasion, engendered religious controversies. Historical discussions are often far more nuanced, and less one-sided than often imagined. 'Exotheology' is a lively subdiscipline within several religious traditions. This Element offers a wide-ranging introduction to the multifarious 'problems of God and astrobiology', real and perceived. It covers major topics within Christian theology (e.g., creation, incarnation, salvation), as well as issues specific to Judaism, Islam, Buddhism, and Hinduism. It also discusses the very different perspectives offered by other (non)religious traditions, including Mormonism, various 'alien-positive' new religious movements (e.g., Heaven's Gate, Scientology, Raëlism), and the 'Ancient Astronaunt' theories popularized by Erich von Dāniken and the History channel's Ancient Aliens

Profile of Mental Functioning. M Axis

This chapter describes 12 categories of basic mental functions that can help clinicians capture the complexity and individuality of each patient. The authors provide descriptions of different levels of psychological functioning and adaptation, ranging from more compromised to more functional, along with descriptors that allow a clinician to rate a patient in each capacity. Clinical utility demands that both adaptive and maladaptive functioning be taken into account in order to plan the most effective and well-rounded therapeutic interventions, anticipate challenges that may arise during treatment, delineate therapeutic goals, and evaluate treatment progress

OSS4EVA: Using Open-Source Tools to Fulfill Digital Preservation Requirements

This paper builds on the findings of a workshop held at the 2015 International Conference on Digital Preservation (iPRES), entitled, “Using Open-Source Tools to Fulfill Digital Preservation Requirements” (OSS4PRES hereafter). This day-long workshop brought together participants from across the library and archives community, including practitioners, proprietary vendors, and representatives from open-source projects. The resulting conversations were surprisingly revealing: while OSS’ significance within the preservation landscape was made clear, participants noted that there are a number of roadblocks that discourage or altogether prevent its use in many organizations. Overcoming these challenges will be necessary to further widespread, sustainable OSS adoption within the digital preservation community. This article will mine the rich discussions that took place at OSS4PRES to (1) summarize the workshop’s key themes and major points of debate, (2) provide a comprehensive analysis of the opportunities, gaps, and challenges that using OSS entails at a philosophical, institutional, and individual level, and (3) offer a tangible set of recommendations for future work designed to broaden community engagement and enhance the sustainability of open source initiatives, drawing on both participants’ experience as well as additional research

Spectral signatures of photosynthesis. II. Coevolution with other stars and the atmosphere on extrasolar worlds. Astrobiol 7

Apparently the vegetable kingdom in Mars, instead of having green for a dominant colour, is of a vivid bloodred tint. —H.G. Wells, The War of the Worlds, 1898 As photosynthesis on Earth produces the primary signatures of life that can be detected astronomically at the global scale, a strong focus of the search for extrasolar life will be photosynthesis, particularly photosynthesis that has evolved with a different parent star. We take previously simulated planetary atmospheric compositions for Earth-like planets around observed F2V and K2V, modeled M1V and M5V stars, and around the active M4.5V star AD Leo; our scenarios use Earth’s atmospheric composition as well as very low O2 content in case anoxygenic photosynthesis dominates. With a line-by-line radiative transfer model, we calculate the incident spectral photon flux densities at the surface of the planet and under water. We identify bands of available photosynthetically relevant radiation and find that photosynthetic pigments on planets around F2V stars may peak in absorbance in the blue, K2V in the red-orange, and M stars in the near-infrared, in bands at 0.93–1.1 �m, 1.1–1.4 �m, 1.5–1.