1,013 research outputs found
Insects Associated with Michigan Bumblebees (\u3ci\u3eBombus\u3c/i\u3e Spp.)
(excerpt)
Studies of insect associates of bumblebees are not new. For example, Tuck (1896, 1897) reported over 50 species of insects associated with nests of British bumblebees. Sladen (1912) discussed nest associates and parasites of European bumblebees, and Plath (1934) published similar data for American bumblebees. Postner (1952) published more detailed data. He listed over 60 taxa of insects associated with bumblebees near Erlangen, Germany
Dissecting the complex environment of a distant quasar with MUSE
High redshift quasars can be used to trace the early growth of massive
galaxies and may be triggered by galaxy-galaxy interactions. We present MUSE
science verification data on one such interacting system consisting of the
well-studied z=3.2 PKS1614+051 quasar, its AGN companion galaxy and bridge of
material radiating in Lyalpha between the quasar and its companion. We find a
total of four companion galaxies (at least two galaxies are new discoveries),
three of which reside within the likely virial radius of the quasar host,
suggesting that the system will evolve into a massive elliptical galaxy by the
present day. The MUSE data are of sufficient quality to split the extended
Lyalpha emission line into narrow velocity channels. In these the gas can be
seen extending towards each of the three neighbouring galaxies suggesting that
the emission-line gas originates in a gravitational interaction between the
galaxies and the quasar host. The photoionization source of this gas is less
clear but is probably dominated by the two AGN. The quasar's Lyalpha emission
spectrum is double-peaked, likely due to absorbing neutral material at the
quasar's systemic redshift with a low column density as no damping wings are
present. The spectral profiles of the AGN and bridge's Lyalpha emission are
also consistent with absorption at the same redshift indicating this neutral
material may extend over > 50 kpc. The fact that the neutral material is seen
in the line of sight to the quasar and transverse to it, and the fact that we
see the quasar and it also illuminates the emission-line bridge, suggests the
quasar radiates isotropically and any obscuring torus is small. These results
demonstrate the power of MUSE for investigating the dynamics of interacting
systems at high redshift.Comment: 9 pages, 6 figures, published in MNRA
Section 16(b) of the Securities Exchange Act of 1934 and Insider Trading Involving Issuer-Granted Employee Stock Options
Identifying clustering at high redshift through actively star-forming galaxies
Identifying galaxy clustering at high redshift (i.e. z > 1) is essential to
our understanding of the current cosmological model. However, at increasing
redshift, clusters evolve considerably in star-formation activity and so are
less likely to be identified using the widely-used red sequence method. Here we
assess the viability of instead identifying high redshift clustering using
actively star-forming galaxies (SMGs associated with over-densities of
BzKs/LBGs). We perform both a 2- and 3-D clustering analysis to determine
whether or not true (3D) clustering can be identified where only 2D data are
available. As expected, we find that 2D clustering signals are weak at best and
inferred results are method dependant. In our 3D analysis, we identify 12 SMGs
associated with an over-density of galaxies coincident both spatially and in
redshift - just 8% of SMGs with known redshifts in our sample. Where an SMG in
our target fields lacks a known redshift, their sightline is no more likely to
display clustering than blank sky fields; prior redshift information for the
SMG is required to identify a true clustering signal. We find that the strength
of clustering in the volume around typical SMGs, while identifiable, is not
exceptional. However, we identify a small number of highly clustered regions,
all associated with an SMG. The most notable of these, surrounding
LESSJ033336.8-274401, potentially contains an SMG, a QSO and 36 star-forming
galaxies (a > 20sig over-density) all at z~1.8. This region is highly likely to
represent an actively star-forming cluster and illustrates the success of using
star-forming galaxies to select sites of early clustering. Given the increasing
number of deep fields with large volumes of spectroscopy, or high quality and
reliable photometric redshifts, this opens a new avenue for cluster
identification in the young Universe.Comment: 24 pages, 14 figures, accepted MNRA
Glen E. Dickenson and M. W. Husband to Governor Ross Barnett, 28 September 1962
Senders discuss the attempted invasions of both Cuba and Mississippi.https://egrove.olemiss.edu/west_union_gov/1057/thumbnail.jp
What are the consequences of over and undertreatment of type 2 diabetes mellitus in a frail population? A systematic review
\ua9 2024 The Authors. Endocrinology, Diabetes & Metabolism published by John Wiley & Sons Ltd.Aims: This review aims to identify the evidence base for the consequences of over and undertreatment of type 2 diabetes mellitus in a frail population. Method: In this systematic review, we searched MEDLINE, Embase, PubMed, CINAHL and the Cochrane Library for studies from January 2001 to 15th August 2022. We included a variety of study types that assessed and reported frailty including patients ≥18 years old. Studies included those that reported the prevalence of over or undertreatment of diabetes mellitus in a frail population and those examining outcomes related to glucose control in frail older people living with diabetes. Data were extracted using a bespoke extraction table using a narrative synthesis approach. Results: A total of 4114 articles were identified with 112 meeting inclusion criteria. These included 15,130 participants across the 11 studies with sample sizes ranging from 101 to 11,140. Several areas were identified in the included studies where under or overtreatment of diabetes impacted outcomes for patients. These included hospital admissions, readmissions, length of stay, falls, mortality, cognitive impairment and cardiovascular disease outcomes. Conclusion: The results showed that there was a high heterogeneity of outcomes between the studies and that many examined small numbers of participants. In this review, both over and undertreatment were shown to increase adverse outcomes in frail older people. Further research around optimal glycaemic control for frail older people living with diabetes is required with the aim to identify ideal target ranges and produce practical clinical guidelines to promote attainment of these
A systematic review and thematic synthesis of patients' experience of medicines adherence
Background: Medicines non-adherence continues to be problematic in health care practice. After decades of research, few interventions have a robust evidence-based demonstrating their applicability to improve adherence. Phenomenology has a place within the health care research environment. Objective: To explore patients’ lived experiences of medicines adherence reported in the phenomenonologic literature. Methods: A systematic literature search was conducted to identify peer-reviewed and published phenomenological investigations in adults that aimed to investigate patients’ lived experiences of medicines adherence. Studies were appraised using the Critical Appraisal Skills Programme (CASP) Qualitative Research Tool. Thematic synthesis was conducted using a combination of manual coding and NVivo10 [QSR International, Melbourne] coding to aid data management. Results: Descriptive themes identified included i) dislike for medicines, ii) survival, iii) perceived need, including a) symptoms and side-effects and b) cost, and iv) routine. Analytic themes identified were i) identity and ii) interaction. Conclusions: This work describes adherence as a social interaction between the identity of patients and medicines, mediated by interaction with family, friends, health care professionals, the media and the medicine, itself. Health care professionals and policy makers should seek to re-locate adherence as a social phenomenon, directing the development of interventions to exploit patient interaction with wider society, such that patients ‘get to know’ their medicines, and how they can be taken, throughout the life of the patient and the prescription
Examining fault behaviour of a superconducting DC network
A large body of research is currently being conducted into superconducting power system applications, targeting improved efficiency and reductions in system size and weight. In order to attain the required levels of safety and reliability of the superconducting power system, effective protection systems, tailored to the specific fault behaviour of the novel components must also be in place. This paper presents a review of relevant literature concerning the dynamic and transient characteristics of superconducting DC networks and key associated components (such as superconducting cables and machines). This first part of a two stage Failure Modes and Effects Analysis (FMEA) is presented, which provides a conceptual consideration of expected physical failure modes and mechanisms. The effects on the wider network are discussed from which various protection considerations are drawn. A number of key research questions are drawn from this study, which will form the starting point of the second stage of the FMEA. The outputs from the FMEA will shape the protection requirements for a superconducting DC network
Operational management of trunk main discolouration risk
Despite significant on-going investment, water companies continue to receive an unacceptable number of discolouration related customer contacts. In this paper, data from intensive distribution system turbidity monitoring and cluster analysis of discolouration customer contacts indicate that a significant proportion of these contacts are due to material mobilising from the trunk main system, and operational flow increases are shown to have a higher discolouration risk than burst incidents. A trunk main discolouration incident highlighting this risk is discussed, demonstrating the need for pro-active trunk main risk assessments. To identify the source of the material event flow rates were modelled using the PODDS (prediction of discolouration in distribution systems) discolouration model. Best practice pro-active management is demonstrated in a case study where the PODDS model is used to implement managed incremental flow changes on a main with known discolouration risk with no discolouration impact to customers and significant cost savings
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