4,291 research outputs found
Factors affecting the growth and recruitment of cyprinid populations of the River Wensum, Eastern England, with specific reference to roach Rutilus rutilus (L.).
No full text1. The roach Rutilus rutilus population of the River Wensum, Eastern England, has long been the topic of deliberation amongst the angling community due to a perceived decline in their catches since the 1970s. Analysis of fish population survey data collected by the Environment Agency and its predecessor organisations since 1983 revealed that although the roach populations have shown considerable temporal variability around their long-term mean abundances, their estimated abundance in 2009 was not significantly different to that estimated in the 1980s. A significant decline in the abundance of dace Leusicus leusicus (L.) was detected, although the abundance of chub Leuciscus cephalus (L.) has increased. 2. Annual variation in the recruitment strength of 0 group roach contributed to their temporal variability in population abundance. Recruitment was largely driven by climate, specifically water temperatures in the first year of life of year classes. Point abundance electric fishing sampling conducted in 2007 and 2008 revealed that nursery habitat was limited for the larval and juvenile life stages of the roach population, revealed by only 6 % of all points sampled containing 4 at least one roach. The probability of roach capture in a sample point only exceeded 0.80 when depths exceeded 1m and macrophyte cover the sampled area exceeded 60 %. 3. The growth rate of adult roach has declined between the 1970s and the present, with this long-term depressed growth only apparent since the initiation of phosphate stripping in the mid to late 1990s. Prior to phosphate stripping, roach growth was largely dependent on water temperature; post-stripping, it was significantly associated with levels of ortho-phosphate. Thus, whilst this reduction in nutrient input into the river was positive for its chemical and biological water quality, it now prevents individual fish growing rapid to a size considered as a 1Especimen 1F by anglers (>1 kg). It is this depressed growth and reduction in the numbers of 1Especimen 1F roach being produced in the river that is contributing to the perceived declines of roach by the angling fraternity. 4. To prevent flooding in the river catchment, a number of flood prevention works have been regularly completed by authorities, including channel straightening and removal of in-stream woody debris. Whilst these tend to have negative consequences for fish production, the cutting of in-stream macrophytes during the summer months to ensure the channel was sufficiently clear to facilitate flood relief flows was measured as having a significant deleterious impact for juvenile roach. Comparison of pre- and post-weed cutting electric fishing point samples revealed presence and abundance of juvenile roach decreased by approximately 50 % following weed cutting. 5 5. These outputs were used to develop a series of management recommendations to assist the production of roach in the river without compromising other river management perspectives such as flood risk management. A key aspect of this is the creation of in-stream and off-channel refuge and nursery areas for roach that promote their survival and growth across all aspects of their lifecycle
Potential directions for drug development for osteoarthritis
No full textBackground: osteoarthritis (OA) is a frustrating disease for both patient and physician because neither cause nor cure is known and there are currently no disease-modifying drugs. Objective: To review current therapeutic approaches as well as new findings regarding OA pathoetiology that could form the basis of future direction for the development of drugs to prevent or slow down disease progression. Methods: After reviewing disease progression in human OA, as demonstrated by histological analyses, the reasons for cartilage erosion are explored and possible therapeutic approaches are highlighted. Results/conclusions: OA may be an epigenetic disease. This new concept can explain many aspects of the disease and provide reasons why therapeutic approaches until now have met with little success
The FM and PL Libraries Documentation
No full textBuilding complex SPMD code in an ecient and portable way is nowadays a challenge, especially when there is no uniformity of tools and libraries across platforms. The Fast Messages (FM) and the Portability Library (PL) where both designed to provide the basis of an abstract enough framework for C, so that problems can be coded and ported to any supported platform with no more than a few changes in the makeles and a recompilation. The FM library provides a message passing communications library built around the Berkeley Active Messages library. The PL library provides the primitives for host to node communication for problem initialization and results collection, as well as other miscellaneous and potentially non-portable primitives. This technical report contains the documentation for both libraries.Technical report LCSR-TR-25
Increasing science, technology, engineering, and mathematics skills using Project Lead the Way
No full textIncludes bibliographical references
Introduction to Urban Science: Evidence and Theory of Cities as Complex Systems
No full textLuís Bettencourt provides a timely, comprehensive, and rigorous treatment of urban space, by contributing to the
advancement of knowledge in the field of urban science. The author develops a valuable scientific guide for researchers,
policymakers, practitioners, and students interested in understanding cities as complex systems. Today, more than half of
world's population lives in urban areas, and, according to theWorld Bank data, by 2045, urban citizens will increase up to
6 billion. Cities of different sizes will play a pivotal role in the postpandemic recovery and, most importantly, they will
make the green transition of our economies and societies really work in coming years. Therefore, understanding “how
each city and every one of its people is the result of the aggregation of many choices, accidents, and influences from
their compounded joint history” (p. xxi) becomes crucial to manage present and future local and global challenges
MultiEmo: Multilingual, Multilevel, Multidomain Sentiment Analysis Corpus of Consumer Reviews
No full textMultiEmo, a new benchmark data set for the multilingual sentiment analysis task including 11 languages. The collection contains consumer reviews from four domains: medicine, hotels, products and university. The original reviews in Polish contained 8,216 documents consisting of 57,466 sentences. The reviews were manually annotated with sentiment at the level of the whole document and at the level of a sentence (3 annotators per element). We achieved a high Positive Specific Agreement value of 0.91 for texts and 0.88 for sentences. The collection was then translated automatically into English, Chinese, Italian, Japanese, Russian, German, Spanish, French, Dutch and Portuguese. MultiEmo is publicly available under a Creative Commons Attribution 4.0 International Licence.
More information: https://github.com/CLARIN-PL/multiemo
Citation:
@inproceedings{kocon2021multiemo,
title={Multiemo: Multilingual, multilevel, multidomain sentiment analysis corpus of consumer reviews},
author={Koco{\'n}, Jan and Mi{\l}kowski, Piotr and Kanclerz, Kamil},
booktitle={International Conference on Computational Science},
pages={297--312},
year={2021},
organization={Springer}
The chain-level intersection product for PL pseudomanifolds revisited
No full textAbstract We generalize the PL intersection product for chains on PL manifolds and for intersection chains on PL stratified pseudomanifolds to products of locally finite chains on non-compact spaces that are natural with respect to restriction to open sets. This is necessary to sheafify the intersection product, an essential step in proving duality between the Goresky-MacPherson intersection homology product and the intersection cohomology cup product pairing recently defined by the author and McClure. We also provide a correction to the Goresky-MacPherson proof of a version of Poincaré duality on pseudomanifolds that is used in the construction of the intersection product
Prodromus Entomology : Natural History Of Lepidopterous Insects Of New South Wales ; Collected, Engraved, And Faithfully Painted After Nature / By John William Lewin, A.L.S. Of Paramatta, New South Wales. Published From The Hand Of His Brother Thomas Lewin ...
No full textPRODROMUS ENTOMOLOGY : NATURAL HISTORY OF LEPIDOPTEROUS INSECTS OF NEW SOUTH WALES ; COLLECTED, ENGRAVED, AND FAITHFULLY PAINTED AFTER NATURE / BY JOHN WILLIAM LEWIN, A.L.S. OF PARAMATTA, NEW SOUTH WALES. PUBLISHED FROM THE HAND OF HIS BROTHER THOMAS LEWIN ...
Prodromus Entomology : Natural History Of Lepidopterous Insects Of New South Wales ; Collected, Engraved, And Faithfully Painted After Nature / By John William Lewin, A.L.S. Of Paramatta, New South Wales. Published From The Hand Of His Brother Thomas Lewin ... (1)
Cover (1)
Frontispiz / Titelseite (10)
Widmung (11)
Preface (12)
Phalaenoides Glycinae. Pl. 1. (14)
Sphinx Ardenia. Pl. 2. (16)
Sphinx Oldenlandiae. Pl. 3. (17)
Bombyx Vulnerans. Pl. 4. (19)
Bombyx Nasuta. Pl. 5. (20)
Bombyx Lewinae. Pl. 6. (22)
Bombyx Exposita. Pl. 7. (23)
Bombyx Tristis. Pl. 8. (25)
Bombyx Banksiae. Pl. 9. (26)
Cryptophasa Irrorata. Pl. 10. (28)
Cryptophasa Albacosta. Pl. 11. (29)
Cryptophasa Rubescens. Pl. 12. (31)
Cryptophasa Pultenae. Pl. 13. (32)
Cryptophasa Strigata. Pl. 14. (34)
Lithosa Replana. Pl. 15. (35)
Hepialus Ligniveren. Pl. 16. (37)
Tortrix Australana. Pl. 17. (38)
Tinea Cossuna. Pl. 18. (40)
Publication Prices (41
Laplacian PL Image Evaluation Implying Correction of Photon Scattering in the Luminescence Detector
No full textAbstractPhotoluminescence (PL) imaging is an established characterization method for investigating local inhomogeneities in solar cells. Conventional evaluation methods are based on the model of independent diodes, leading to wrong results of the local saturation current density J01. The Laplacian-based PL evaluation method does not rely on this model and has the potential to image J01 correctly. First attempts for using this method to evaluate PL images failed. In this contribution it is shown that the main reason for this failure was due to the light scattering effect occurring in the luminescence detector. Implying an image deconvolution procedure to the PL images with the correct point spread function, the result of the Laplacian-based evaluation method nearly shows the correct J01 distribution. It will be shown that the Laplacian-based method has also the potential to image the different dark current contributions (J01, J02 and ohmic) separately, as DLIT can do it already now
Determining solubility for finitely generated groups of PL homeomorphisms
No full textFunding: The first and second authors were partially supported by EPSRC grant EP/H011978/1. The third author was partially supported by grants from the Simons Foundation (#245625) and the National Science Foundation (DMS-1313559)The set of finitely generated subgroups of the group PL+(I) of orientation-preserving piecewise-linear homeomorphisms of the unitinterval includes many important groups, most notably R. Thompson’s group F. Here, we show that every finitely generated subgroup G < PL+(I) is either soluble, or contains an embedded copy of the finitely generated, non-soluble Brin-Navas group B, affirming a conjecture of the first author from 2009. In the case that G is soluble, we show the derived length of G is bounded above by the number of breakpoints of any finite set of generators. We specify a set of ‘computable’ subgroups of PL+(I) (which includes R. Thompson’s group F) and give an algorithm which determines whether or not a given finite subset X of such a computable group generates a soluble group. When the group is soluble, the algorithm also determines the derived length of ⟨X⟩. Finally,we give a solution of the membership problem for a particular familyof finitely generated soluble subgroups of any computable subgroup of PL+(I).Peer reviewe
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