7,724 research outputs found
Covering gonalities of complete intersections in positive characteristic
We define the covering gonality and separable covering gonality of varieties
over arbitrary fields, generalizing the definition given by Bastianelli-de
Poi-Ein-Lazarsfeld-Ullery for complex varieties. We show that over an arbitrary
field a smooth multidegree complete intersection in
has separable covering gonality at least , where
. We also show that the very general such variety has
covering gonality at least .Comment: 13 page
EFFECTS OF COVER BOARD AGE, SEASON, AND HABITAT ON THE OBSERVED ABUNDANCE OF EASTERN RED-BACKED SALAMANDERS (PLETHODON CINEREUS)
Plethodontid salamanders are potentially good ecological indicator species in woodland habitats due to their abundance and sensitivity to changes in the environment. The use of terrestrial salamanders as ecological indicators depends on effective means of surveying their abundance and distribution. Our study examined the use of old and new artificial cover boards by Eastern Red-backed Salamanders (Plethodon cinereus). We also considered the effects of season (spring vs. fall) and habitat type (deciduous vs. coniferous vs. mixed) on cover board use by P. cinereus. Our results indicated that P. cinereus abundance was greater under old cover boards compared to new cover boards. However, the difference between the use of old and new cover boards was greater during the spring than the fall, suggesting that the effect of cover board age became weaker over time. Plethodon cinereus showed strong seasonal variation in observed abundance, with peaks during the spring and fall seasons and very low surface activity during the summer. Plethodon cinereus had higher observed abundance in deciduous habitats than in coniferous and mixed habitats. Our results suggested that care should be taken to account for cover board age in long-term monitoring programs, especially if cover boards are replaced during a study
THE ECOLOGICAL CONSEQUENCES OF HABITAT AND MICROHABITAT USE IN LIZARDS:: A REVIEW
We review the ecological consequences of habitat and microhabitat use in lizards. Different habitats have different biotic and abiotic properties and thus are likely to have different consequences for the lizards that occur in them. Individual performance and life histories are influenced by habitat use, particularly when habitats differ in thermal characteristics that may influence physiological processes or constrain activity. We know relatively little about how the effects of habitat use on individual performance translate into population dynamics. We do know that the ability of lizards to use particular habitats can influence the persistence of populations in the face of habitat changes. Community-level processes (e.g., competition) and community structure (e.g., diversity) can be influenced by habitat use in lizards, often by habitat use facilitating co-existence of two or more potentially competing species. We know relatively little about how other community processes, such as predation and parasitism, are influenced by habitat use
Bounded gaps between primes in special sequences
We use Maynard's methods to show that there are bounded gaps between primes
in the sequence , where is an irrational
number of finite type. In addition, given a superlinear function satisfying
some properties described by Leitmann, we show that for all there are
infinitely many bounded intervals containing primes and at least one
integer of the form with a positive integer.Comment: 14 page
Pulse transit time: a new approach to haemodynamic monitoring in obstetric spinal anaesthesia
Part of the Portfolio Thesis by Geoffrey H. Sharwood-Smith: The inferior vena caval compression theory of hypotension in obstetric spinal anaesthesia: studies in normal and preeclamptic pregnancy, a literature review and revision of fundamental concepts, available at http://hdl.handle.net/10023/1815Original abstract presented at the Obstetric Anaesthetisits' Association congress 2002, Nottingham, 9-10 May.Postprin
Nursing and midwifery students' encounters with poor clinical practice:a systematic review
The aim of this paper was to systematically review evidence about nursing and midwifery students’ encounters with poor clinical care.We undertook a systematic review of English language empirical research using multiple databases from inception to April 2016. Hand searching was also undertaken. Included papers contained accounts of empirical research which reported on students’ encounters with poor care. These were quality-assessed, information was extracted into tables, and study results were synthesized using thematic analysis.N=14 papers met inclusion criteria; study quality was moderate to good. Study synthesis revealed four themes: i) encounters with poor practice: students encounter poor practice that is likely to be worthy of professional sanction; ii) while intention to report is high in hypothetical scenarios, this appears not always to translate to actual practice; iii) a range of influencing factors impact the likelihood of reporting; iv) the consequences of encountering and subsequently reporting poor practice appeared to have a lasting effect on students.Research is required to determine the frequency and nature of students' encounters with poor care, when and where they encounter it, how to increase the likelihood that they will report it, and how they can be supported in doing so
Pulse transit time confirms altered response to spinal anaesthesia in pregnancy induced hypertension
Poster presented at the International Society for the Study of Hypertension in Pregnancy (ISSHP)Congress, Toronto 2002.Part of the Portfolio Thesis by Geoffrey H. Sharwood-Smith: The inferior vena caval compression theory of hypotension in obstetric spinal anaesthesia: studies in normal and preeclamptic pregnancy, a literature review and revision of fundamental concepts, available at http://hdl.handle.net/10023/1815Postprin
English and Melanesian Pidgin in the Admiralty
This paper looks at the language of adolescents in the Admiralty Islands, who are educated through the medium of English but are fluent in Melanesian Pidgin English (Tok Pisin). It was found that lexical innovation in Manus included massive borrowing of English lexical items, especially verbs, into Tok Pisin. However, in most cases the borrowings are integrated rather than forming obvious code switches. The introduced words and phrases have the potential to influence the evolving grammar of Tok Pisin, and it seems that English and Tok Pisin are moving closer together, but descriptions of the phenomenon as a post-creole continuum appear to be premature
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