1,492 research outputs found
A comparison of the moss floras of Chile and New Zealand
No full textChile and New Zealand share a common stock of 181 species of mosses in 94 genera and 34 families. This number counts for 23.3% of the Chilean and 34.6% of the New Zealand moss flora. If only species with austral distribution are taken into account, the number is reduced to 113 species in common, which is 14.5% of the Chilean and 21.6% of the New Zealand moss flora. This correlation is interpreted in terms of long distance dispersal resp. the common phytogeographical background of both countries as parts of the palaoaustral floristic region and compared with disjunct moss floras of other continents as well as the presently available molecular data
ploewe/MOSS: v1.0
No full textThis is the first release of the MOSS codebase in its transient GitHub repository to ensure long term preservation of the codebase, scientific citation and due credit to the original authors (including Carl N Reed III and Sol Katz)
IBM PC Data Acquisition and Processing Software Evaluation
No full textCommercially available software packages for IBM PC-compatibles are evaluated to use for data acquisition and processing work. Moss Landing Marine Laboratories (MLML) acquired computers since 1978 to use on shipboard data acquisition (Le. CTD, radiometric, etc.) and data processing. First Hewlett-Packard desktops were used then a transition to the DEC VAXstations, with software developed mostly by the author and others at MLML (Broenkow and Reaves, 1993; Feinholz and Broenkow, 1993; Broenkow et al, 1993). IBM PC were at first very slow and limited in available software, so they were not used in the early days. Improved technology such as higher speed microprocessors and a wide range of commercially available software made use of PC more reasonable today. MLML is making a transition towards using the PC for data acquisition and processing. Advantages are portability and available outside support
Hawking-Moss transition with a black hole seed
No full text\ua9 2020, The Author(s).We extend the concept of Hawking-Moss, or up-tunnelling, transitions in the early universe to include black hole seeds. The black hole greatly enhances the decay amplitude, however, order to have physically consistent results, we need to impose a new condition (automatically satisfied for the original Hawking-Moss instanton) that the cosmological horizon area should not increase during tunnelling. We motivate this conjecture physically in two ways. First, we look at the energetics of the process, using the formalism of extended black hole thermodynamics; secondly, we extend the stochastic inflationary formalism to include primordial black holes. Both of these methods give a physical substantiation of our conjecture
Resurrecting Dr. Moss the life and letters of a Royal Navy surgeon, Edward Lawton Moss MD, RN, 1843 - 1880
No full text"Resurrecting Dr. Moss chronicles the life and death of Edward Lawton Moss, a Royal Navy surgeon on the last great British north polar expedition of the nineteenth century. Arctic historians and bibliophiles are familiar with Moss's account of the1875-76 British Arctic Expedition, published under the title Shores of the Polar Sea, but little has been known about Moss himself. Now, thanks to Paul Appleton's painstaking research, his life has taken shape in this well-crafted biography." "Relying heavily on Moss's own letters, Appleton has created a portrait of a man he calls "an example of the best traditions of British naval medicine during the Victorian era." Author, artist, explorer, and scientist, Dr. Moss was also a pioneering medical officer. After being posted in British Columbia, he played a pivotal role in founding one of the earliest medical institutions on Canada's west coast, the hospital at the Esquimalt Naval Base. Dr. Moss's life was cut short at the age of thirty-seven when the HMS's Atalanta disappeared en route from Bermuda in 1880." "Resurrecting Dr. Moss includes several previously unpublished letters and is illustrated with a selection of Moss's watercolours."--BOOK JACKET
Investigation of metal ions sorption of brown peat moss powder
No full textFor regularities research of sorptive extraction of heavy metal ions by cellulose and its derivates from aquatic solution of electrolytes it is necessary to find possible mechanism of sorption process and to choice a model describing this process. The present article investigates the regularities of aliovalent metals sorption on brown peat moss powder. The results show that sorption isotherm of Al3+ ions is described by Freundlich isotherm and sorption isotherms of Na+ и Ni2+ are described by Langmuir isotherm. To identify the mechanisms of brown peat moss powder sorption the IR-spectra of the initial brown peat moss powder samples and brown peat moss powder samples after Ni (II) sorption were studied. Metal ion binding mechanisms by brown peat moss powder points to ion exchange, physical adsorption, and complex formation with hydroxyl and carboxyl groups
Checklist of the mosses of sub-Saharan Africa
No full text2939 moss taxa are listed for sub-Saharan Africa and adjacent islands, with distribution by country. Each distribution record is supported by a literature reference. The following new combinations are made: Calyptrochaeta cristata (Hedw.) O’Shea, Groutiella elimbata (Thér) O’Shea, Meiothecium undulatum (Ren. & Card.) O’Shea, Orthodontium ruwenzorensis (Thér. & Nav.) O’Shea, Pohlia lacouturei (Thér.) O’Shea, Sematophyllum corticolum (Aongstr.) O’Shea, Sematophyllum dixonii (Thér.) O’Shea, Sematophyllum nanopyxis (Geh.) O’Shea, Sematophyllum rigescens (Card.) O’Shea, and Thamnobryum malgachum (Card.) O’Shea
Irrigation of Urban Moss Surfaces: Making Cities Climate Resilient by Enhancing Moss Growth on Façades
No full textMoss covered surfaces are a promising way to mitigate the urban heat island effect. A layer of moss on a building’s façade reduces heat absorption during summer, hence passively cooling the building and its surroundings. The startup Respyre wants to offer such moss layers as a commercial product. A bio-gel mixed with moss fragments is sprayed on a porous concrete outer layer. This is irrigated for several months until the wall is covered by a layer of living moss.The aim of this project is to rethink the existing irrigation system, since it gives a bad water distribution, resulting in high water usage and uneven moss growth.First, the context was analysed. Literature study and an interview with an expert provided a better understanding of what role moss has in mitigating the urban heat island effect and what moss needs from a biological perspective. Further research revealed what solutions for providing moist already exist. A stakeholder analysis provided insight into who has something to say about the irrigation system. All these findings together resulted in a list of requirements.During a brainstorm, a set of ideas was sketched to find as many out-of-the-box solutions as possible. This is a mix of new ideas, existing ideas found during the analysis, and combined ideas.The brainstormed ideas that are feasible were developed into concepts. They were prototyped and their water distributing performance was tested by irrigating them in a green house. The concepts have been assessed on (among others) water distribution, estimated costs, minimum water pressure, ease of installation, and the need for developing new parts.Five promising concepts were further developed and tested on a larger prototype. Their water distribution was quantitively tested, and costs estimated.The finally chosen solution was further improved and detailed in the last stage. The end result is a design and prototype of an irrigation system that gives a slightly more uniform water distribution at a significantly slower rate for comparable costs.Integrated Product Desig
Black holes, oscillating instantons and the Hawking-Moss transition
No full text\ua9 2020, The Author(s). Static oscillating bounces in Schwarzschild de Sitter spacetime are investigated. The oscillating bounce with many oscillations gives a super-thick bubble wall, for which the total vacuum energy increases while the mass of the black hole decreases due to the conservation of Arnowitt-Deser-Misner (ADM) mass. We show that the transition rate of such an “up-tunneling” consuming the seed black hole is higher than that of the Hawking- Moss transition. The correspondence of analyses in the static and global coordinates in the Euclidean de Sitter space is also investigated
Spontaneous moss growth on concrete
No full textThe world population will continue to grow, resulting in an overpopulated planet and increased urbanization. This creates several problems, such as heat stress in cities, reduced biodiversity and the disappearance of greenery in cities. The World Health Organization has made a list of indicators based on which the sustainability of cities can be assessed. One of these indicators is a minimum amount of 9 m2 green space per capita. Currently, few cities meet this requirement, which threatens the quality of life for city dwellers. A possible solution to obtain more green area in urban regions can be to have more green surfaces on buildings and structures. To realize this in an efficient, low maintenance, and cheap way, concrete could be designed to stimulate the growth of mosses. Spontaneous abundant moss growth on young concrete structures can actually already be observed in the build environment, however this is often unintentional and unwanted, and is seen as degradation of the concrete. A better understanding of why spontaneous moss growth occurs on some constructions while it does not on others can help to intentionally design green concrete structures, and eliminate unwanted spontaneous moss growth on concrete. It has been found in this research that the curing conditions and the cement type being used are two major influencing factors that can contribute to the presence or absence of abundant moss growth on current relative young concrete constructions. A hospitable concrete surface is needed to support the growth of a biofilm, that can subsequently develop in moss. This hospitable concrete surface is provided by the concrete microstructure, a lowered pH, and a sufficient surface roughness. To obtain concrete that is bioreceptive and will enable mosses to grow on its surface, a low-clinker content concrete must be used that is insufficiently cured. This will cause a porous and permeable outer layer of the concrete, that has been related to moss growth on concrete. Due to the low buffering capacity towards alkalinity, the pH at the cover zone of the concrete will be lower, thereby making the surface more attractive for micro-organisms to settle on. Another effect of insufficient curing is an increase in carbonation, which also leads to a more porous and permeable cover zone for low-clinker concrete. To prevent moss growth on concrete, a dense microstructure and a high pH at the outer layer of the concrete must be created. This can be obtained by using a high-clinker content concrete. From this research it can be concluded that a high-clinker mix is relatively not very vulnerable for the curing conditions. A high-clinker content concrete will provide a dense microstructure and high buffer capacity towards alkalinity, even though it has been cured insufficiently.Civil Engineering | Structural Engineerin
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