5,888 research outputs found
Successful ageing in an area of deprivation: Part 1âA qualitative exploration of the role of life experiences in good health in old age
Objectives: To determine the life histories and current circumstances of healthy and unhealthy older people who share an ecology marked by relative deprivation and generally poor health.
Study design: In-depth interview study with a qualitative analysis.
Methods: Matched pairs of healthy and unhealthy âagersâ were interviewed face-to-face. Healthy ageing was assessed in terms of hospital morbidity and self-reported health. Study participants consisted of 22 pairs (44 individuals), aged 72â89 years, matched for sex, age and deprivation category, and currently resident in the West of Scotland. All study participants were survivors of the Paisley/Renfrew (MIDSPAN) survey, a longitudinal study commenced in 1972 with continuous recording of morbidity and mortality since.
Detailed life histories were obtained which focused on family, residence, employment, leisure and health. This information was supplemented by more focused data on âcritical incidentsâ, financial situation and position in social hierarchies.
Results: Data provided rich insights into life histories and current circumstances but no differences were found between healthy and unhealthy agers.
Conclusions: It is important to understand what differentiates individuals who have lived in circumstances characterized by relative deprivation and poor health, yet have aged healthily. This study collected rich and detailed qualitative data. Yet, no important differences were detected between healthy and unhealthy agers. This is an important negative result as it suggests that the phenomenon of healthy ageing and the factors that promote healthy ageing over a lifetime are so complex that they will require even more detailed studies to disentangle
Alien Registration- Hanlon, James H. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/23234/thumbnail.jp
Ammonia uptake and release in the MnX<sub>2</sub>âNH<sub>3</sub> (X = Cl, Br) systems and structure of the Mn(NH<sub>3</sub>)nX<sub>2</sub> (n = 6, 2) ammines
Hexa-ammine complexes, Mn(NH<sub>3</sub>)<sub>6</sub>X<sub>2</sub> (X = Cl, Br), have been synthesized by ammoniation of the corresponding transition metal halide and characterized by Powder X-ray diffraction (PXRD) and Raman spectroscopy. The hexa-ammine complexes are isostructural (Cubic,Fm-3m, Z = 4; a = 10.2742(6) Ă
and 10.527(1) Ă
for X = Cl, Br respectively). Temperature programmed desorption (TPD) demonstrated that ammonia release from Mn(NH<sub>3</sub>)<sub>6</sub>X<sub>2</sub> complexes occurred in three stages corresponding to the release of 4, 1 and 1 NH<sub>3</sub> equivalents respectively. The chloride and bromide both exhibit a deammoniation onset temperature below 323 K. The di-ammoniates from the first desorption step were isolated during TPD measurements and their crystal structures determined by Rietveld refinement against PXRD data (X = Cl: orthorhombicCmmm, a = 8.1991(9) Ă
, b = 8.2498(7) Ă
, c = 3.8212(4) Ă
, Z = 2; X = Br: orthorhombic Pbam, a = 6.0109(5) Ă
, b = 12.022(1) Ă
, c = 4.0230(2) Ă
, Z= 2)
Spectra of Unsteady Wind Models of Gamma-Ray Bursts
We calculate the spectra expected from unsteady relativistic wind models of
gamma-ray bursts, suitable for events of arbitrary duration. The spectral
energy distribution of the burst is calculated over photon energies spanning
from eV to TeV, for a range of event durations and variability timescales. The
relative strength of the emission at different wavelengths can provide valuable
information on the particle acceleration, radiation mechanisms and the possible
types of models.Comment: 10 pages, 2 postscript figures included, uses aaspp4.sty. Accepted
for publication in the Astrophysical Journal Letters. Also available at
http://www.astro.psu.edu/users/hara/Preprints/xxx_sub.p
El Salvadorâs Bitcoin law is destined to be caught in the FATFâs regulatory web
Abstract. In the middle of the night of June 8th, El Salvadorâs Congress hastily passed the Bitcoin Law. This law will make bitcoin legal tender (actually, forced tender). Since the modalities concerning the implementation of the Bitcoin Law change with each passing day, we cannot opine on the details surrounding the scheduled launch of the Bitcoin Law on September 7, 2021. That said, itâs abundantly clear that if the Bitcoin Law is actually implemented, El Salvadoran banks, merchants, and their customers will cross swords with Financial Action Task Force regulators and be ensnared in the FATFâs web of regulations.Keywords. Bitcoin law, Bitcoin, El Salvador.JEL. H56, D74, J51, J52, D39
Rapid surfactant-free synthesis of Mg(OH)2 nanoplates and pseudomorphic dehydration to MgO
Magnesium hydroxide nanoplates ca. 50 nm in thickness can be prepared over minute timescales via hydrothermal synthesis in a multimode cavity (MMC) microwave reactor. This approach allows ca. 1 g of single-phase Mg(OH)2 to be synthesised in under 3 minutes without the requirement of surfactants or non-aqueous solvents. The hydroxide nanomaterial dehydrates at temperatures >200 K below that of the equivalent bulk material and can be utilised as a precursor for the pseudomorphic synthesis of nanoplates of MgO as investigated by TG-DTA-MS, XRD and SEM measurements. Equally, the pseudomorphic synthesis can be performed by irradiating the Mg(OH)2 nanomaterial with microwaves for 6 minutes to produce single phase MgO
Cellular structure of -Brauer algebras
In this paper we consider the -Brauer algebra over a commutative
noetherian domain. We first construct a new basis for -Brauer algebras, and
we then prove that it is a cell basis, and thus these algebras are cellular in
the sense of Graham and Lehrer. In particular, they are shown to be an iterated
inflation of Hecke algebras of type Moreover, when is a field of
arbitrary characteristic, we determine for which parameters the -Brauer
algebras are quasi-heredity. So the general theory of cellular algebras and
quasi-hereditary algebras applies to -Brauer algebras. As a consequence, we
can determine all irreducible representations of -Brauer algebras by linear
algebra methods
Laboratory Growth, Reproduction and Life Span of the Pacific Pygmy Octopus, Octopus digueti
Octopus digueti Perrier and Rochebrune, 1894 was reared through
its life cycle at 25°C in a closed seawater system using artificial sea water. Two
field-collected females produced 231 hatchlings: 193 hatchlings were groupcultured
while 24 were isolated at hatching and grown individually to allow
precise analyses of growth in length and weight over the life cycle. All octopuses
were fed primarily live shrimps. Maturing adults fed at a rate of 4.7% of body
weight per day and had a gross growth efficiency of 48%. Growth in weight was
exponential for the first 72 days and described best by the equation: WW(g) =
.0405eâą0646t. The mean growth rate over this period was 6.4% increase in body
weight per day (%/d), with no significant difference between male and female
growth. From 72 to 143 days, growth was logarithmic and described best by the
equation: WW(g) = (6.78 x 1O- 6) t3 .13. Females grew slightly faster than males
over this growth phase. During the exponential growth phase, mantle length
increased at a mean rate of 2.1% per day, declining to 1.1% per day over the
logarithmic phase. No attempt was made to describe mathematically the period
of declining growth rate beyond day 143. The primary causes of early mortality
in group culture were escapes and cannibalism. Survival was good despite high
culture density: 73% survival to date of first egg laying (day 111). Survival was
better among the isolated growth-study octopuses: 88% to the date of first egg
laying (day 130). Mean life span was 199 days in group-reared octopuses and
221 days in the growth-study octopuses. There was no significant difference
between male and female life span. Progeny of the group culture were reared at
similar stocking densities and fed predominantly fresh dead shrimp and crab
meat. This diet resulted in cannibalism, with only 6% survival to first egg laying
on day 128. Fecundity in this group was lower. Octopus digueti is a good
candidate for laboratory culture and biological experimentation because of its
small size, rapid growth, short life span, and good survival in group culture
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