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Letteratura scientifica selezionata sul tema "Bats Composition"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 febbraio 2022

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Articoli di riviste sul tema "Bats Composition"

Kumaran, Jayaraj Vijaya, Besar Ketol, Wahap Marni, Isa Sait, Mohamad Jalani Mortada, Faisal Ali Anwarali Khan, Fong Pooi Har, Leslie S. Hall e Mohd Tajuddin Abdullah. "COMPARATIVE DISTRIBUTION AND DIVERSITY OF BATS FROM SELECTED LOCALITIES IN SARAWAK". Borneo Journal of Resource Science and Technology 1, n. 1 (29 giugno 2016): 1–13. http://dx.doi.org/10.33736/bjrst.257.2011.

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Surveys on the chiropteran diversity were conducted at eight different localities in Sarawak to document the bat diversity as well as to estimate the composition of bats in these areas. The major finding of bat surveys shows that montane areas have distinct chiropteran composition compared with those in lowland and logged areas. Disturbed habitats do pose a threat to the overall diversity of bats, with the generalist bats been more successful in colonising altered area than those with specialised habitat requirements. Sampling of bats targeted at different site and vegetation type from several protected areas in Sarawak have revealed the current record of bats in Sarawak and its diversity can be monitored for better management of biodiversity in this important region.

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Barbier, Eder, Gustavo Graciolli e Enrico Bernard. "Structure and composition of Nycteribiidae and Streblidae flies on bats along an environmental gradient in northeastern Brazil". Canadian Journal of Zoology 97, n. 5 (maggio 2019): 409–18. http://dx.doi.org/10.1139/cjz-2018-0098.

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Bats can be parasitized by several arthropod groups, including ectoparasitic flies. The high host specificity is a common phenomenon between flies and bats. In recent years, more efforts have been employed to understand how environmental variables can influence richness and parasitic load (PL). However, many gaps still need to be filled to better understand this issue. We analyzed the PL of flies on bats sampled in three environments with different rain volume and vegetation types to verify if PL is correlated with rainfall and if there are differences in the PL on bats within and between environments. Overall, there was no correlation between rainfall and PL in the same environment, nor a difference between the three environments. When tested separately, Seba’s short-tailed bats (Carollia perspicillata (Linnaeus, 1758)) had a difference in prevalence of flies between environments and flat-faced fruit-eating bats (Artibeus planirostris (Spix, 1823)) had a greater abundance of flies in the rainy season in a semiarid area. There was no difference in PL between male and female bats. Our results suggest that bat–fly interactions are driven by several factors, not only by the amount of rainfall or vegetation, and that different host species may respond differently with no obvious general pattern.

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Tiwari, Nabina, Narayan Prasad Koju, Pushpa Raj Acharya e Man Kumar Dhamala. "Diet composition of Indian flying fox (Pteropus giganteus) in Kathmandu valley". Nepal Journal of Environmental Science 7 (31 dicembre 2019): 25–30. http://dx.doi.org/10.3126/njes.v7i0.34412.

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The composition of diet reflects the food availability and food preference by wildlife in their respective habitat. Flying fox (Pteropus giganteus) is the largest bat species that inhabit the urban area of Kathmandu Valley. The diet composition of Flying fox and their conservation threat was studied from January to April 2018. Bats roosting at Kesharmahal, Kathmandu and Sallaghari, Bhaktapur were selected for the study. The diet consumed was explored by micro-histological analysis from fresh fecal samples (guano) and bolus collected from the roost site. The samples were collected by spreading plastic sheets of 2m × 2m for a whole day. The droppings from bats were collected on 50 mL vials with 70% alcohol. Altogether 140 samples were collected. The collected droppings were used to micro histological slides where the seeds were isolated and identified using a hand lens. The pollens presence in slides were observed under the compound microscope and tallied with the reference slides for identification. Altogether 17 and 10 different plant families were identified from dropping of bats from Kesharmahal and Sallaghari, respectively. Among them, Moraceae and Myrtaceae were common diets in bats of both locations. Our result shows P. giganteus consumes food from the Myrtaceae, Brassicaceae, Malvaceae, Apiaceae, Pinaceae, Fagaceae, Proteaceae and Anacardiaceae families in Kathmandu Valley. P. giganteus mostly depend on foods present nearby the roost and also flies far away in search of food, which is comparatively minimal.

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Dietrich, Muriel, Teresa Kearney, Ernest C. J. Seamark, Janusz T. Paweska e Wanda Markotter. "Synchronized shift of oral, faecal and urinary microbiotas in bats and natural infection dynamics during seasonal reproduction". Royal Society Open Science 5, n. 5 (maggio 2018): 180041. http://dx.doi.org/10.1098/rsos.180041.

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Seasonal reproduction is a period of extreme physiological and behavioural changes, yet we know little about how it may affect host microbial communities (i.e. microbiota) and pathogen transmission. Here, we investigated shifts of the bacterial microbiota in saliva, urine and faeces during the seasonal reproduction of bats in South Africa, and test for an interaction in shedding patterns of both bacterial ( Leptospira ) and viral (adeno- and herpesviruses) agents. Based on a comparative approach in two cave-dwelling bat species and high-throughput sequencing of the 16S rRNA gene, we demonstrated a clear signature in microbiota changes over the reproduction season, consistent across the multiple body habitats investigated, and associated with the sex, age and reproductive condition of bats. We observed in parallel highly dynamic shedding patterns for both bacteria and viruses, but did not find a significant association between viral shedding and bacterial microbiota composition. Indeed, only Leptospira shedding was associated with alterations in both the diversity and composition of the urinary microbiota. These results illustrate how seasonal reproduction in bats substantially affects microbiota composition and infection dynamics, and have broad implications for the understanding of disease ecology in important reservoir hosts, such as bats.

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Bejec, Gilbert A., Lilibeth A. Bucol, Tomas D. Reyes, Reizl P. Jose, Agustin B. Angcog, Albert C. Pagente, Josie M. Rodriguez, Anna Lee N. Bejec e Neri Fretz P. Paglinawan. "Abundance and Species Composition of Cave Bats (Mammalia: Chiroptera) in Selected Key Biodiversity Areas (KBAs) of Central Visayas, Philippines". JURNAL ILMIAH SAINS 21, n. 1 (27 aprile 2021): 73. http://dx.doi.org/10.35799/jis.21.1.2021.31238.

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This study assessed the abundance and species richness of bats (Order Chiroptera) inhabiting caves in three KBAs (Key Biodiversity Areas) of Central Visayas: Mt. Bandilaan in Siquijor (13 caves), Mabinay, Negros Oriental (11 caves), and Rajah Sikatuna Protected Landscape(RSPL) in Bohol (31 caves). The study was conducted between February 14 to September 20, 2019. Of the 55 caves surveyed, 35 caves were inhabited by bats. Field survey methods included mist-netting at the cave entrances and direct observations of roosting sites in each cave. This study captured 754 individuals of bats belonging to 16 species, majority of which are insectivorous species (13 species) and only three species are fruitbats (Pteropodidae). Mabinay caves had the highest number of species (11) and captured bats (271 individuals) while RSPL had 9 species (221 individuals) while Mt. Bandilaan only had five species but relatively high captured bats (262 individuals). Five species are Philippine endemics (Hipposideros obscurus, Hipposideros pygmaeus, Ptenochirus jagori, Rhinolophus inops, and R. rufus) and three Near-threatened species (H. lekaguli, M. schreibersii, and R. rufus). The rare bat species (Dobsonia chapmani) may be locally extirpated in Mabinay, where it last documented at Mambajo cave in the 1960s. The survey also noted the absence of fruit bats (observed in 2011 study) in all of the caves in Mt. Bandilaan, probably due to on-going anthropogenic activities (treasure hunting, bat hunting, guano extraction, land conversion, locals illegal entry, graffiti, etc) in caves surveyed. Large colonies of fruitbats and insect bats in RSPL may have been affected by anthropogenic activities inside the caves. Most of the caves surveyed have been promoted for ecotourism activities.Keywords: cave; chiropteran; extraction; karst; limestone

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Barbosa Leal, Edson Silva, Deoclécio de Queiróz Guerra Filho, Daniel de Figueiredo Ramalho, Julianne Moura da Silva, Rafael Sales Bandeira, Luiz Augustinho Menezes da Silva e Maria Adélia Borstelmann de Oliveira. "Bat Fauna (Chiroptera) in an urban environment in the Atlantic Forest, northeastern Brazil". Neotropical Biology and Conservation 14, n. 1 (11 aprile 2019): 55–82. http://dx.doi.org/10.3897/neotropical.14.e34837.

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In Brazil, only few works have been conducted regarding urban bats and information about richness, composition and ecological interactions in urban areas is little known. Additional studies are important to understand the dynamic of urban bats and offer strategies for their protection. In this paper, we present the results of a bat inventory at the Dois Irmãos campus of UFRPE, Recife, Pernambuco, northeastern Brazil, with analyzes of the composition, richness, diversity, and seasonal variation. From May 2006 to April 2007, we captured 950 bats from 16 species (five families). Frugivores bats accounted for 84.42% of the captures, followed by insectivores, piscivorous, nectarivores, omnivores, and hematophages. The species Artibeus planirostris was the most abundant. There was no significant difference (t = 0.35443, p = 0.7257) on abundance between the seasons of the year. We observed a richer and more diverse bat fauna as one would expect in an urban area, which suggests that the campus is being used for foraging, commuting, or as shelters for these animals.

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Hanadhita, Desrayni, Anisa Rahma, Muhammad R. Wahid, Ni Luh Putu I. Mayasari, Aryani S. Satyaningtijas, Eiichi Hondo e Srihadi Agungpriyono. "Extracellular matrix composition of different spleen compartments of fruit bats". Anatomia, Histologia, Embryologia 49, n. 2 (marzo 2020): 281–89. http://dx.doi.org/10.1111/ahe.12526.

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Emerson, Justin K., e Alison M. Roark. "Composition of guano produced by frugivorous, sanguivorous, and insectivorous bats". Acta Chiropterologica 9, n. 1 (aprile 2007): 261–67. http://dx.doi.org/10.3161/1733-5329(2007)9[261:cogpbf]2.0.co;2.

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Simmons, James A., Prestor A. Saillant, Janine M. Wotton, Tim Haresign, Michael J. Ferragamo e Cynthia F. Moss. "Composition of biosonar images for target recognition by echolocating bats". Neural Networks 8, n. 7-8 (gennaio 1995): 1239–61. http://dx.doi.org/10.1016/0893-6080(95)00059-3.

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Chattopadhyay, Balaji, Kritika M. Garg, Rajasri Ray, Ian H. Mendenhall e Frank E. Rheindt. "Novel de Novo Genome of Cynopterus brachyotis Reveals Evolutionarily Abrupt Shifts in Gene Family Composition across Fruit Bats". Genome Biology and Evolution 12, n. 4 (15 febbraio 2020): 259–72. http://dx.doi.org/10.1093/gbe/evaa030.

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Abstract Major novel physiological or phenotypic adaptations often require accompanying modifications at the genic level. Conversely, the detection of considerable contractions and/or expansions of gene families can be an indicator of fundamental but unrecognized physiological change. We sequenced a novel fruit bat genome (Cynopterus brachyotis) and adopted a comparative approach to reconstruct the evolution of fruit bats, mapping contractions and expansions of gene families along their evolutionary history. Despite a radical change in life history as compared with other bats (e.g., loss of echolocation, large size, and frugivory), fruit bats have undergone surprisingly limited change in their genic composition, perhaps apart from a potentially novel gene family expansion relating to telomere protection and longevity. In sharp contrast, within fruit bats, the new Cynopterus genome bears the signal of unusual gene loss and gene family contraction, despite its similar morphology and lifestyle to two other major fruit bat lineages. Most missing genes are regulatory, immune-related, and olfactory in nature, illustrating the diversity of genomic strategies employed by bats to contend with responses to viral infection and olfactory requirements. Our results underscore that significant fluctuations in gene family composition are not always associated with obvious examples of novel physiological and phenotypic adaptations but may often relate to less-obvious shifts in immune strategies.

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Più fonti

Tesi sul tema "Bats Composition"

Andersson, Skog Nils. "Bats in Urban Sweden : A multiple regression analysis of bats’ relationship to urbanization". Thesis, Södertörns högskola, Miljövetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-45771.

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Human development continues to use up more physical space in the natural world, threatening the natural habitats of many organisms. To combat the loss of biodiversity science needs to explore what landscape features are important for different organisms so that we can incorporate these into the modern environment. As bats play an important role in many ecosystems and can reflect changes through trophic levels, analyzing their preferred habitats can help planners improve biological diversity of the urban habitat. Using acoustically identified bat sightings from Artportalen.se for the years 2017-2018, this paper studied the habitats of bats in Sweden. Through multiple regression analysis we examine the response in abundance and/or diversity of bats to physical and socio-cultural attributes of the urban habitat. We examined a total of 10160 bats from 18 species in 418 land cover locales and 306 demographical statistical areas with varying degrees of urbanization. Our results indicate that bat abundance and diversity decrease significantly with higher urbanization while deciduous forests are the most important land cover type for all bats. The results also indicate that wealthier areas have less abundance and diversity even when factoring in population density. Species specific analysis suggested that bat species who are better adapted at foraging in open vegetated landscapes and over water were less susceptible to the negative impacts of the urban habitat. We conclude that diverse habitats with a mixture of open vegetated areas, watercourses and broadleaf forests are the most important land features for a diverse bat fauna along with high connectivity via tree cover and linear landscape elements. If urban planning could incorporate these features into the urban habitat, some of the negative impacts of urbanization could be prevented.

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Russ, Jonathan M. "The Microchiroptera of Northern Ireland : community composition, habitat associations and ultrasound". Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480681.

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Redinger, Petra Best Troy L. "Variation in populational size and composition within two summer colonies of endangered gray bats (Myotis grisescens)". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/REDINGER_PETRA_52.pdf.

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Stevens, Bryan. "Formal Organization in Ground-bass Compositions". Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804844/.

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This thesis examines formal organization in ground-bass works. While it is true that many or even most works of the ground-bass repertoire are variation sets over a ground, there also exist many ground-bass works that are not in variation form. The primary goal of this thesis is to elucidate the various ways in which such non-variation formal organizations may be achieved. The first chapter of this work discusses the general properties of ground basses and various ways that individual phrases may be placed in relation to the statements of the ground. The second chapter considers phrases groupings, phrase rhythm, and the larger formal organizations that result. The third chapter concludes this study with complete analyses of Purcell’s “When I am laid in earth” from Dido and Aeneas and Delanade’s “Jerusalem, convertere ad dominum Deum tuum” from his setting of the Leçons de ténèbres.

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Ng, Kah-Ming. "Figured bass accompaniment at the harpsichord in its social and artistic context". Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249865.

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Techapiesancharoenkij, Ratchatee 1979. "Bimetallic bars with local control of composition by three-dimensional printing". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16626.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004.
Includes bibliographical references (p. 106-107).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Three Dimensional Printing (3DP) is a process that enables the fabrication of geometrically complex parts directly from computer-aided design (CAD) models. The success of 3DP as an alternative manufacturing technology to bulk machining of materials for complex parts has been demonstrated. By proof of concept, 3DP has demonstrated the ability to create parts with Local Control of the Composition (LCC). LCC allows tailoring the material properties in regions of a part for functional purposes. In this work, LCC was studied and demonstrated by fabricating bimetallic bars consisting of two layers of Fe-Ni alloys with different composition and, hence, different thermal expansion properties; the coefficient of thermal expansion (CTE) of Fe-Ni system is sensitive to its composition. Two types of the binder/dopant slurries were made for making the LCC bars. One type consisted of dispersions of Fe₂O₃ particles in water, and the other consisted of dispersion of NiO in water. The LCC bars were successfully made by printing the Fe₂O₃/NiO slurries into Fe-30Ni base powders. After heat treatment to impart strength to the printed bars, the bars were successfully retrieved from unbound powders. The bars, then, were annealed at 1400 ⁰C for 2 hours for sintering and homogenization. The final composition of the base powders were changed accordingly. In the layers on which an Fe₂O₃ slurry was printed, the Fe composition of the layers increased on average to 72wt%. Similarly, the Ni composition of the Ni-enriched layers of the bars increased on average to 33wt%. The densification and local homogenization resulting from reduction and sintering treatments were not satisfactory.
(cont.) The major problem was presumably caused by the oxide residues. The presence of the oxide powders was evident from the microprobe measurement. The oxide residues caused the local compositions to be inhomogeneous. As a result, the compositional profiles showed considerable scatter. Moreover, the residues impeded the sintering rate of the bars; the sintering densities of the bars were as small as 78% of the theoretical density. The resulting bimetallic bars did exhibit bending deflection on uniform heating. However, the bending deflections were much smaller than expected. Evidently, the compositional profiles of the bars critically influence their thermal bending properties. The scatter in the compositional profiles resulted in local variations of CTE in the bars, which degraded the thermal bending properties. A linear elastic model that allows prediction of the deflection as a function of composition profile shows good agreement with the observed deflections in the bimetallic bars with LCC.
by Ratchatee Techapiesancharoenkij.
S.M.

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Nelly, Thomas F. "I. Research-based rubrics for assessing undergraduate music compositions a validity study. II. Identity crisis : a composition for wind ensemble, percussion, electric organ, and electric bass /". [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013772.

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Peterson, Nick Ryan. "Subspecies composition, genetic variation and structure of Largemouth Bass in Puerto Rico reservoirs". Thesis, Mississippi State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1604215.

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Subspecies composition and genetic variation are important to the growth and survival of Largemouth Bass and information on these genetic characteristics is required for proper management of the species. In Puerto Rico, a genetic evaluation is needed to develop management plans for Puerto Rico reservoirs and maintain Florida Largemouth Bass at the Maricao Hatchery. Subspecies composition was characterized among reservoirs and the contemporary Maricao Hatchery broodstock in Puerto Rico, and metrics were compared between subspecies and hybrids among reservoir populations. Genetic variation and structure was determined and compared to Largemouth Bass populations in their native range. Florida subspecies were prevalent in all populations and non-introgressed subspecies seemed to be better adapted to the island than introgressed forms. Genetic diversity was lower in Puerto Rico populations and substantial genetic structure among populations was lacking. These results provide genetic information to guide future management and propagation of Largemouth Bass in Puerto Rico.

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Johansen, Benjamin David. "Relent: a Composition for Alto Saxophone, Double Bass, Two Percussion, and Interactive Electronics". Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115100/.

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relent is a sacred work within the genre of interactive electronic music. the 20-minute composition is a multi-movement piece for four instrumentalists (saxophone, double bass, and two percussion) and computer that is inspired by the gospel message. relent is specifically about the gospel message that Christ died for man’s sins, rose from the dead, and through faith in him man can be reconciled to God. This project was an experiment in creating a work with a programmatic extramusical structure. in preparation for writing a piece based on Christian programmatic content, this paper presents an overview of research conducted on the intersection between art and Christianity referencing authors such as Harold Best, Nikolai Berdyaev, Hans Rookmaaker, Calvin Seerveld, Daniel Seidell, A. W. Tozer, Steve Turner, and Cornelius Van Til. This work was an experiment in trying to make very direct and specific musical ties to the narrative of the Gospel. Another highly experimental aspect of relent was in the way interactive electronics were used. Each acoustic instrument in the work has its own input and module within the Max patch, extending each acoustic instrument rather than adding an electronic accompaniment component. Additionally, non-traditional notation, both codified and real-time computer generated, improvisation, theatrical instructions, and a completely computer generated movement makes relent a piece that challenges and pushes the boundaries of current interactive electronic music.

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Reveles, Jaime Salvador. "May-SHEE-Ka from Atzlan for Large Orchestra and (SATB) Soprano, Alto, Tenor, and Bass Choir". FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/212.

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My composition May-SHEE-Ka from Atzlan for orchestra and choir creates a sound world that imagines what some of the sounds might have been like when the Mexica people first arrived on the banks of Lake Texcoco in the early development of the Mesoamerican region. This along with my research of the Mexicas musical and cultural practices provides the context for this work for full orchestra and SATB choir. The title of my work May-SHEE-Ka from Aztlan is derived from the pronunciation of the word Mexica in the Nahuatl language of Mesoamerica. Mexica is the name of the nomadic tribe more commonly referred to as the Aztecs. It is believed that the Mexica came from Atzlan, which is said to be the ancestral home of the Nahua peoples, a key cultural group of Mesoamerica. The word Azteca comes from the Nahuatl word for people from Atzlan. The title of this work is my own extraction of this historical understanding.

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Libri sul tema "Bats Composition"

Read well spiders and bats: Units 13 and 14. Boston, Mass: Cambium Learning, 2009.

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Bast, Carol M. Foundations of legal research and writing / Carol M. Bast, Margie Hawkins. 4^a ed. Clifton Park, NY: Delmar Cengage Learning, 2010.

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Bast, Carol M. Foundations of legal research and writing / Carol M. Bast, Margie Hawkins. 4^a ed. Clifton Park, NY: Delmar Cengage Learning, 2010.

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Vincent-Lang, Doug. Age, length, and species compositions of groundfish harvested in the marine sport fisheries of Resurrection Bay, Alaska, 1988-1990. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1991.

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Pearson, Donald E. Trends in landings, species composition, length-frequency distributions, and sex rations of 11 Rockfish species (Genus Sebastes) from central and northern California ports (1978-88). Tiburon, Calif: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Science Center, 1990.

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Hendrix, Jimi. The Jimi Hendrix concerts: Authoritative transcriptions for guitar, bass and drums with detailedplayers' notes and photographs for each composition. London: Music Sales Ltd, 1991.

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The musical guide: Parts 1 (1700/10), 2 (1721), and 3 (1717). Oxford: Clarendon, 1989.

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Publishing, Blossoming. Notebook. Bats Hanging Upside Down: 6x9 Lined Journal. Ruled Notebook. Diary. Notes. to-Do List. Composition Book. Memory Book. Thoughts. Ideas. Gift. Cute Funny Cool Love Happy Meme Mood Emoji. Couple in Love. White Cover. Independently Published, 2020.

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Brown, Tyrone. Mel Bay presents Compositions for Bass. Mel Bay Publications, Ind., 2006.

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Capitoli di libri sul tema "Bats Composition"

Durney, Lawrence J. "Plating Bath Compositions and Operating Conditions". In Electroplating Engineering Handbook, 226–62. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-2547-5_6.

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Shen, Zhiliang, Heming Yang e Qun Liu. "Particulate Organic Carbon and Its Composition in Jiaozhou Bay". In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 227–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_14.

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Shen, Zhiliang, Qian Shi, Shan Zheng e Shengjun Pan. "Nutrient Composition and Biomass of Coscinodiscus asteromphalus in Jiaozhou Bay, China". In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 269–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_17.

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Xiang, Youbing, Lan Lan, Chaofa Zhang, Shanxi Liu e Qiang Wang. "Composition Optimization and Mechanical Properties Control for 500MPa High Strength Ribbed Bars". In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 967–72. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119223399.ch121.

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Youbing, Xiang, Lan Lan, Zhang Chaofa, Liu Shanxi e Wang Qiang. "Composition Optimization and Mechanical Properties Control for 500MPa High Strength Ribbed Bars". In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 967–72. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48767-0_121.

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Shen, Zhiliang, Yulin Wu, Qun Liu e Yun Yao. "Nutrient Compositions of Cultured Thalassiosira rotula and Skeletonema costatum from Jiaozhou Bay". In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 237–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_15.

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Shen, Zhiliang. "Long-Term Changes in Nutrient Structure and Its Influences on Phytoplankton Composition in Jiaozhou Bay". In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 175–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_11.

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Pan, Shengjun, Zhiliang Shen, Wenping Liu, Xiaotian Han, Hui Miao e Haiqing Ma. "Differences in Nutrient Compositions of Cultured Marine Diatoms: Different Sea Areas, Sizes, and Seasons". In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 251–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_16.

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Poncsák, Sándor, László Kiss, Alexandre Belley, Sébastien Guérard e Jean-François Bilodeau. "Study of the Structure and Thermophysical Properties of the Side Ledge in Hall-Héroult Cells Operating with Modified Bath Composition". In Light Metals 2015, 655–59. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch110.

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Poncsák, Sándor, László Kiss, Alexandre Belley, Sébastien Guérard e Jean-François Bilodeau. "Study of the Structure and Thermophysical Properties of the Side Ledge in Hall-Héroult Cells Operating with Modified Bath Composition". In Light Metals 2015, 655–59. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_110.

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Atti di convegni sul tema "Bats Composition"

Tikhonenko, I. S. "ORBITAL COMPOSITION OF INNER BARS IN DISK GALAXIES". In 48-th International student's conferences "Physics of Space". Ural University Press, 2020. http://dx.doi.org/10.15826/b978-5-7996-2935-9.25.

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Gullapalli, Sravani, Paul Michael, Jennifer Kensler, Mercy Cheekolu, Robert Ian Taylor e Enrique Lizarraga-Garcia. "An Investigation of Hydraulic Fluid Composition and Aeration in an Axial Piston Pump". In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4259.

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Manufacturers of fluid power equipment have decreased the size of hydraulic fluid reservoirs in response to economic, environmental and performance requirements. Residence times as brief as 30 seconds in mobile equipment are not unusual. Shorter fluid residence times dictate use of hydraulic fluids with improved air release characteristics. In this investigation, hydraulic fluids of the same ISO viscosity grade but varying base oil and additive composition were evaluated in a dynamometer fitted with a reservoir that incorporated an aerator at the inlet, and a mass flow meter at the outlet. The effects of aeration on piston pump efficiency and air borne noise generation were evaluated. Fluids of the same ISO viscosity grade exhibited significantly different air release rates and as a result sustained different volume fractions of entrained air. Hydraulic oils that entrained a greater volume of air demonstrated lower volumetric efficiencies and higher sound levels. Aerated fluids of the identical viscosity grade differed in volumetric efficiency by as much as 8% and perceived sound level by as much as 50%. Models for the effect of aeration on pump performance are presented.

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Rambaks, Andris, e Katharina Schmitz. "Method for the Experimental Determination of the Bunsen Absorption Coefficient of Hydraulic Fluids". In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1702.

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Abstract A manometric-volumetric method to determine the Bunsen absorption coefficient of hydraulic fluids at high-pressures is presented. The virial equation of state is used to determine the amount of substance and its composition in the gaseous phase and at high-pressures. An error-analysis is presented for a best-case error estimate of the method.

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Jade, Shyam, Erik Hellstro¨m, Anna Stefanopoulou e Li Jiang. "On the Influence of Composition on the Thermally-Dominant Recompression HCCI Combustion Dynamics". In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6050.

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A zero dimensional, mean-value, control-oriented model for recompression homogeneous charge compression ignition (HCCI) combustion with two discrete states representing temperature and composition dynamics is presented. This model captures steady state magnitudes and trends in combustion phasing, residual gas fraction, and mass flows caused by sweeps in valve timings, fueling rate, and fuel injection timing. It is shown that the coupling of the composition state with the mainly thermally-driven combustion dynamics causes competing slow and fast dynamics that shape the transient response of the phasing. A decoupled version of the model, where composition does not affect combustion phasing, is also developed in an effort to further simplify the model. This version matches the steady state fidelity of the coupled model, but has a qualitatively different dynamical behavior. Both models exhibit complex behaviors such as limit cycles at extremely late phasing. Both realizations are valid contenders as low order steady state representations of HCCI behavior. High-fidelity transient data will be necessary to further clarify the necessity of including composition effects on combustion phasing.

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Koch, Kathleen, Viva Tai, Shane Burch, Kathleen Mulligan, Christopher Ames, Robert T. McClellan, Jenni M. Buckley e Amir Matityahu. "In Vitro DEXA-BMD Measurements Affected by Type of Soft Tissue Surrogate". In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-203952.

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Dual-energy x-ray absorptiometry (DEXA), the technique most widely used to assess skeletal integrity, is routinely performed on cadaveric tissue to ensure that the bone mineral densities (BMD) of the test specimens are representative of the target patient population for a particular orthopaedic device [1]. It is well established that DEXA-BMD measurements are sensitive to the amount of fat and other soft tissue present in the region of interest [2]. Recognizing that the removal of perivertebral soft tissue may affect DEXA-BMD readings of in vitro cadaveric specimens, biomechanics researchers have used various “torso surrogates” to simulate the removed tissue and x-ray attenuation. These include: 1) submersion of spinal sections in a physiological saline bath, 2) surrounding spinal sections with gel-filled packs, and 3) packing rice-filled bags around spinal sections and within the internal cavity of eviscerated torsos [3, 4]. It is unknown whether these inter-study differences in technique affect in vitro DEXA measurements. Given the prevalence of soft tissue artifacts in vivo, the goal of this study is to examine the sensitivity of in vitro DEXA-BMD to the quantity and composition of soft tissue surrogates. This work is the first step in a broader study to develop a set of best practices for DEXA scanning of cadaveric tissue.

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Massini, Michela, Robert J. Miller, Howard P. Hodson e Nick Collings. "A Novel Technique for Measuring Stagnation Quantities and Gas Composition in High Temperature Flows". In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22920.

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A new probe has been developed to measure the time averaged stagnation temperature, stagnation pressure and gas composition. This probe can be used in the high temperature regions of gas turbines, including downstream of the combustor and in the first stages of the high pressure turbines, as well as in other environments. The principal benefits of the new probe are that it overcomes the limitations of the standard methods that are used to measure temperature in high temperature environments and that it replaces three separate probes, for the three quantities mentioned above, with one single probe. A novel method of measuring temperature is used, which improves upon the accuracy of thermocouples and increases the temperature operating range. The probe consists of a choked nozzle placed in the hot flow at the point of interest. The working principle is based on the theory that for a choked nozzle, there is a fixed relationship between the stagnation quantities, the gas characteristics and the mass flow rate through the nozzle. The probe has an aspirated phase, where the gas composition and the mass flow rate are measured and a stagnated phase, where the stagnation pressure is measured. The stagnation temperature is determined from the above quantities. The operating principle has been proven valid through laboratory and rig tests. The probe has been successfully tested in a Rolls-Royce Viper engine up to 1000K and 2 bar and in a combustor rig up to 1800K and 4 bars. Measurements of stagnation temperature, stagnation pressure and gas compositions for these tests are presented in the paper and are compared with reference measurements. The accuracy of stagnation pressure and gas composition measurements is equal to the accuracy achievable with techniques that are commonly used in gas turbines. The estimated achievable accuracy of the aspirated probe in terms of temperature measurements is ±0.6%, i.e. ±10K at 1800K, which improves upon the accuracy of temperature measurements performed with standard thermocouples at the same temperatures, the uncertainty of which could be as high as ±2%.

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Pujari, V. K., K. E. Amin e P. H. Tewari. "Development of Improved Processing and Evaluation of Silicon Nitride". In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-317.

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The goals of this program are to develop and demonstrate significant improvements in processing methods, process controls, and nondestructive evaluation (NDE) which can be commercially implemented to produce high-reliability silicon nitride components for advanced heat engine applications at temperatures to 1370°C. Achievement of this goal is being sought by • The use of silicon nitride - 4% yttria composition which is consolidated by glass encapsulated HIP’ping. • The generation of baseline tensile strength data from an initial process route involving injection molding. • Fabrication of tensile test bars by colloidal techniques, e.g. injection molding and colloidal consolidation. • Identification of (critical) flaw populations through NDE and fractographic analysis of tensile bars. • Correlation of measured tensile strength with flaw populations and process parameters. • Minimization of these flaws through innovative improvements in process methods and controls. The program goals are: • mean room temperature tensile strength of 900 MPa and Weibull modulus of 20; • mean 1370°C fast fracture tensile strength of 500 MPa; • mean 1230°C tensile stress rupture life of 100 hours at 350 MPa. This report describes the progress made to date in developing injection molding and colloidal consolidation processes for the net shape forming (NSF) of tensile bars, nondestructive evaluation of processed material, and tensile testing of net shape bars in green and densified states.

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Gao, Bingliang, Dan Li, Xianwei Hu, Zhongning Shi e Zhaowen Wang. "Phase composition and its impacts on bath ratio determination of aluminum electrolyte with additives of KF and NaCl". In 2010 World Non-Grid-Connected Wind Power and Energy Conference (WNWEC). IEEE, 2010. http://dx.doi.org/10.1109/wnwec.2010.5673300.

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Crocker, Robert W., Brent L. Haroldsen, Jerome H. Stofleth e Mien Yip. "EDS Containment Vessel Explosive Test and Analysis". In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63832.

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This report documents the results of two of tests that were performed on an explosive containment vessel at Sandia National Laboratories in Albuquerque, New Mexico in July 2013 to provide some deeper understanding of the effects of charge geometry on the vessel response [1]. The vessel was fabricated under Code Case 2564 of the ASME Boiler and Pressure Vessel Code, which provides rules for the design of impulsively loaded vessels [2]. The explosive rating for the vessel, based on the Code Case, is nine (9) pounds TNT-equivalent. One explosive test consisted of a single, centrally located, 7.2 pound bare charge of Composition C-4 (equivalent to 9 pounds TNT). The other test used six each 1.2 pound charges of Composition C-4 (7.2 pounds total) distributed in two bays of three.

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Maniruzzaman, Mohammed, Rob J. Pickerill e Michael A. Pershing. "Prediction of Tempering Effect on Jominy Hardenability Curve". In HT2019. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.ht2019p0087.

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Abstract Modeling of as-tempered hardness in steel is essential to understanding final properties of heat-treated components. Most of the tempering mathematical models derive a tempering parameter using Hollomon-Jaffe formulation. Some recent models incorporate chemical composition into the general Hollomon-Jaffe relationship. This paper compares model predictions with a substantial set of actual tempered Jominy End Quench bars and the hardness data from them. Improvements to the models and direction for future work are discussed.

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Rapporti di organizzazioni sul tema "Bats Composition"

Williams, J. B. Composition of phytoplankton communities and their contribution to secondary productivity in Carolina Bays on the Savannah River Plant. Office of Scientific and Technical Information (OSTI), agosto 1991. http://dx.doi.org/10.2172/5039033.

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Duch, Michael. Performing Hanne Darboven's Opus 17a and long duration minimalist music. Norges Musikkhøgskole, agosto 2018. http://dx.doi.org/10.22501/nmh-ar.481276.

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Hanne Darboven’s (1941-2009) Opus 17a is a composition for solo double bass that is rarely performed due to the physical and mental challenges involved in its performance. It is one of four opuses from the composers monumental 1008 page Wünschkonzert (1984), and was composed during her period of making “mathematical music” based on mathematical systems where numbers were assigned to certain notes and translated to musical scores. It can be described as large-scale minimalism and it is highly repetitive, but even though the same notes and intervals keep repeating, the patterns slightly change throughout the piece. This is an attempt to unfold the many challenges of both interpreting, preparing and performing this 70 minute long solo piece for double bass consisting of a continuous stream of eight notes. It is largely based on my own experiences of preparing, rehearsing and performing Opus 17a, but also on interviews I have conducted with fellow bass players Robert Black and Tom Peters, who have both made recordings of this piece as well as having performed it live. One is met with few instrumental technical challenges such as fingering, string crossing and bowing when performing Opus 17a, but because of its long duration what one normally would take for granted could possibly prove to be challenging.

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Pedersen, Gjertrud. Symphonies Reframed. Norges Musikkhøgskole, agosto 2018. http://dx.doi.org/10.22501/nmh-ar.481294.

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Symphonies Reframed recreates symphonies as chamber music. The project aims to capture the features that are unique for chamber music, at the juncture between the “soloistic small” and the “orchestral large”. A new ensemble model, the “triharmonic ensemble” with 7-9 musicians, has been created to serve this purpose. By choosing this size range, we are looking to facilitate group interplay without the need of a conductor. We also want to facilitate a richness of sound colours by involving piano, strings and winds. The exact combination of instruments is chosen in accordance with the features of the original score. The ensemble setup may take two forms: nonet with piano, wind quartet and string quartet (with double bass) or septet with piano, wind trio and string trio. As a group, these instruments have a rich tonal range with continuous and partly overlapping registers. This paper will illuminate three core questions: What artistic features emerge when changing from large orchestral structures to mid-sized chamber groups? How do the performers reflect on their musical roles in the chamber ensemble? What educational value might the reframing unfold? Since its inception in 2014, the project has evolved to include works with vocal, choral and soloistic parts, as well as sonata literature. Ensembles of students and professors have rehearsed, interpreted and performed our transcriptions of works by Brahms, Schumann and Mozart. We have also carried out interviews and critical discussions with the students, on their experiences of the concrete projects and on their reflections on own learning processes in general. Chamber ensembles and orchestras are exponents of different original repertoire. The difference in artistic output thus hinges upon both ensemble structure and the composition at hand. Symphonies Reframed seeks to enable an assessment of the qualities that are specific to the performing corpus and not beholden to any particular piece of music. Our transcriptions have enabled comparisons and reflections, using original compositions as a reference point. Some of our ensemble musicians have had first-hand experience with performing the original works as well. Others have encountered the works for the first time through our productions. This has enabled a multi-angled approach to the three central themes of our research. This text is produced in 2018.

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