Lasting Only (lasting + only)

Distribution by Scientific Domains


Selected Abstracts


Using underwater cameras to describe the reproductive behaviour of the endangered eastern freshwater cod Maccullochella ikei

ECOLOGY OF FRESHWATER FISH, Issue 3 2009
G. L. Butler
Abstract,,, Underwater cameras were used to observe the breeding behaviour of the endangered eastern freshwater cod, Maccullochella ikei, over 3 years and across three areas in the Mann and Nymboida rivers, Australia. The annual breeding season for M. ikei was short and succinct, lasting only 8,10 weeks. Spawning commenced each year in the lowest altitude area during the first week of spring, and approximately 1 week later in the closest upstream area. Day-length is the primary spawning cue for M. ikei, but increasing water temperature may also be of importance. Nesting sites were located in slow-flowing pools, under cover such as large boulders and bedrock shelves, at depths of 0.9,4.0 m, and with one or two entrances only. The nesting site was vigorously cleaned by the male up to 1 week prior to spawning and was only entered by the female for spawning. Paternal care of eggs and larvae was undertaken for up to 24 days, after which larvae dispersed. Greater protection of breeding M. ikei must be a management priority to ensure long-term conservation of the species. [source]


Absenteeism among nursing students , fact or fiction?

JOURNAL OF NURSING MANAGEMENT, Issue 5 2002
F. Timmins RGN, FFNRCSI
This study explores absenteeism patterns and trends among a group of third-year student nurses. A questionnaire was used to elicit information about absence behaviour from 110 students at two hospital sites. Retrospective analysis of attendance records of 70 of these students, covering a period of 123 weeks, was also performed to determine absenteeism trends. The findings of the study reveal that 1567 days were lost because of absenteeism during this period on 1027 episodes. This represents a time lost index, which is the amount of days lost expressed as a percentage of total days available, of 4% among the group. Most absenteeism episodes lasted 3 days or less, with 73% of episodes lasting only 1 day. Absenteeism commencing either on Mondays or Fridays accounted for more than half of the absenteeism episodes in the group. Voluntary absence was a reported feature of this group, which occurred more frequently from lectures than wards. The main reasons cited for absence from both lectures and ward duties were personal and social commitments and stress. Students' views on nursing as a career and responses to factors that may cause stress were examined and revealed an association with reported absence behaviour. [source]


Rapidly progressive sporadic dentatorubral pallidoluysian atrophy with intracytoplasmic inclusions and no CAG repeat expansion

MOVEMENT DISORDERS, Issue 12 2006
Alberto J. Espay MD
Abstract A 48-year-old man developed progressive hemidystonia and postural impairment with falls, followed by choreoathetosis, hyporeflexia, ataxia, supranuclear vertical gaze palsy, and dementia, lasting only 3.5 years from symptom onset to death. Family history and genetic testing were unrevealing. Neuropathology showed findings identical to genetic dentatorubral pallidoluysian atrophy (DRPLA), except for the absence of intranuclear inclusions and the presence of intracytoplasmic inclusions in the pons, striatum, thalamus, and subthalamic nucleus. This case expands the clinical and neuropathological spectrum of DRPLA and supports the hypothesis that aggregates may not be intrinsically pathogenic. © 2006 Movement Disorder Society [source]


X-ray emission from optical novae in M 31,

ASTRONOMISCHE NACHRICHTEN, Issue 2 2010
W. Pietsch
Abstract The first supersoft source (SSS) identification with an optical nova in M 31 was based on ROSAT observations. Twenty additional X-ray counterparts (mostly identified as SSS by their hardness ratios) were detected using archival ROSAT, XMM-Newton and Chandra observations obtained before July 2002. Based on these results optical novae seem to constitute the major class of SSS in M 31. An analysis of archival Chandra HRC-I and ACIS-I observations obtained from July 2004 to February 2005 demonstrated that M 31 nova SSS states lasted from months to about 10 years. Several novae showed short X-ray outbursts starting within 50 d after the optical outburst and lasting only two to three months. The fraction of novae detected in soft X-rays within a year after the optical outburst was more than 30%. Ongoing optical nova monitoring programs, optical spectral follow-up and an up-to-date nova catalogue are essential for the X-ray work. Re-analysis of archival nova data to improve positions and find additional nova candidates are urgently needed for secure recurrent nova identifications. Dedicated XMM-Newton/Chandra monitoring programs for X-ray emission from optical novae covering the centre area of M 31 continue to provide interesting new results (e.g. coherent 1105 s pulsations in the SSS counterpart of nova M31N 2007-12b). The SSS light curves of novae allow us , together with optical information , to estimate the mass of the white dwarf, of the ejecta and the burned mass in the outburst. Observations of the central area of M 31 allow us , in contrast to observations in the Galaxy , to monitor many novae simultaneously and proved to be prone to find many interesting SSS and nova types (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]