Exploring employer behaviour in relation to Investors in People

"This report explores employer behaviour in relation to choices they make about Investors in People (IIP) accreditation in order for the future IIP strategy to ensure IIP is relevant, adds value to employers and tackles any barriers to successful delivery. The research focuses on the decision-making processes and experiences of three key groups of employers: employers that have held IIP accreditation for a number of years; employers who previously held IIP accreditation but have let this lapse; and employers who committed to gaining IIP accreditation but subsequently did not to go through the assessment process" - page 1

An optimal hydrodynamic model for the normal Type IIP supernova 1999em

There is still no consensus about progenitor masses of Type IIP supernovae. We study a normal Type IIP SN 1999em in detail and compare it to a peculiar Type IIP SN 1987A. We computed the hydrodynamic and time-dependent atmosphere models interpreting simultaneously both the photometric and spectroscopic observations. The bolometric light curve of SN 1999em and the spectral evolution of its H-alpha line are consistent with a presupernova radius of 500 Rsun, an ejecta mass of 19.0 Msun, an explosion energy of 1.3x10^51 erg, and a radioactive 56Ni mass of 0.036 Msun. A mutual mixing of hydrogen-rich and helium-rich matter in the inner layers of the ejecta guarantees a good fit of the calculated light curve to that observed. Based on the hydrodynamic models in the vicinity of the optimal model, we derive the approximate relationships between the basic physical and observed parameters. We find that the hydrogen recombination in the atmosphere of a normal Type IIP SN 1999em, as well as most likely other Type IIP supernovae at the photospheric epoch, is essentially a time-dependent phenomenon. It is also shown that in normal Type IIP supernovae the homologous expansion of the ejecta in its atmosphere takes place starting from nearly the third day after the supernova explosion. A comparison of SN 1999em with SN 1987A reveals two very important results for supernova theory. First, the comparability of the helium core masses and the explosion energies implies a unique explosion mechanism for these core collapse supernovae. Second, the optimal model for SN 1999em is characterized by a weaker 56Ni mixing up to 660 km/s compared to a moderate 56Ni mixing up to 3000 km/s in SN 1987A, hydrogen being mixed deeply downward to 650 km/s.Comment: 21 pages, 24 figures. Accepted for publication in Astronomy & Astrophysic

Type IIP supernova light curves affected by the acceleration of red supergiant winds

We introduce the first synthetic light-curve model set of Type IIP supernovae exploded within circumstellar media in which the acceleration of the red supergiant winds is taken into account. Because wind acceleration makes the wind velocities near the progenitors low, the density of the immediate vicinity of the red supergiant supernova progenitors can be higher than that extrapolated by using a constant terminal wind velocity. Therefore, even if the mass-loss rate of the progenitor is relatively low, it can have a dense circumstellar medium at the immediate stellar vicinity and the early light curves of Type IIP supernovae are significantly affected by it. We adopt a simple beta velocity law to formulate the wind acceleration. We provide bolometric and multicolor light curves of Type IIP supernovae exploding within such accelerated winds from the combinations of three progenitors, 12 - 16 Msun; five beta, 1-5; seven mass-loss rates, 1e-5 - 1e-2 Msun/yr; and four explosion energies, 0.5e51 - 2e51 erg. All the light curve models are available at https://goo.gl/o5phYb. When the circumstellar density is sufficiently high, our models do not show a classical shock breakout as a consequence of the interaction with the dense and optically-thick circumstellar media. Instead, they show a delayed 'wind breakout', substantially affecting early light curves of Type IIP supernovae. We find that the mass-loss rates of the progenitors need to be 1e-3 - 1e-2 Msun/yr to explain typical rise times of 5 - 10 days in Type IIP supernovae assuming a dense circumstellar radius of 1e15 cm.Comment: 12 pages, 9 figures, 2 tables, accepted by Monthly Notices of the Royal Astronomical Societ

Pulmonary Hypertension in Patients with Chronic Fibrosing Idiopathic Interstitial Pneumonias

Background Pulmonary hypertension (PH) is a common finding in patients with chronic fibrosing idiopathic interstitial pneumonias (IIP). Little is known about the response to pulmonary vasodilator therapy in this patient population. COMPERA is an international registry that prospectively captures data from patients with various forms of PH receiving pulmonary vasodilator therapies. Methods We retrieved data from COMPERA to compare patient characteristics, treatment patterns, response to therapy and survival in newly diagnosed patients with idiopathic pulmonary arterial hypertension (IPAH) and PH associated with IIP (PH-IIP). Results Compared to patients with IPAH (n = 798), patients with PH-IIP (n = 151) were older and predominantly males. Patients with PH-IIP were treated predominantly with phosphodiesterase-5 inhibitors (88% at entry, 87% after 1 year). From baseline to the first follow-up visit, the median improvement in 6MWD was 30 m in patients with IPAH and 24.5 m in patients with PH-IIP (p = 0.457 for the difference between both groups). Improvements in NYHA functional class were observed in 22.4% and 29.5% of these patients, respectively (p = 0.179 for the difference between both groups). Survival rates were significantly worse in PH-IIP than in IPAH (3-year survival 34.0 versus 68.6%; p<0.001). Total lung capacity, NYHA class IV, and mixed-venous oxygen saturation were independent predictors of survival in patients with PH-IIP. Conclusions Patients with PH-IIP have a dismal prognosis. Our results suggest that pulmonary vasodilator therapy may be associated with short-term functional improvement in some of these patients but it is unclear whether this treatment affects survival

Type IIP supernova 2008in: the explosion of a normal red supergiant

The explosion energy and the ejecta mass of a type IIP supernova make up the basis for the theory of explosion mechanism. So far, these parameters have only been determined for seven events. Type IIP supernova 2008in is another well-observed event for which a detailed hydrodynamic modeling can be used to derive the supernova parameters. Hydrodynamic modeling was employed to describe the bolometric light curve and the expansion velocities at the photosphere level. A time-dependent model for hydrogen ionization and excitation was applied to model the Halpha and Hbeta line profiles. We found an ejecta mass of 13.6 Msun, an explosion energy of 5.05x10^50 erg, a presupernova radius of 570 Rsun, and a radioactive Ni-56 mass of 0.015 Msun. The estimated progenitor mass is 15.5 Msun. We uncovered a problem of the Halpha and Hbeta description at the early phase, which cannot be resolved within a spherically symmetric model. The presupernova of SN 2008in was a normal red supergiant with the minimum mass of the progenitor among eight type IIP supernovae explored by means of the hydrodynamic modeling. The problem of the absence of type IIP supernovae with the progenitor masses <15 Msun in this sample remains open.Comment: 6 pages, 8 figures, 1 table, accepted for publication in A&

Investors in People : research on the New Choices approach

"Investors in People (IIP) is a business development tool that was first launched in 1991. The IIP Standard enables organisations to assess how they are managing people, and where improvements can be made. There are 39 evidence requirements which must be met for an organisation to be recognised as meeting the IIP Standard. The New Choices approach to IIP was introduced in May 2009 to provide greater flexibility and customisation of IIP to an employer’s priorities and goals. It also allows progress beyond the IIP Standard and incorporates additional recognition in the form of Bronze, Silver and Gold award levels (for which organisations must provide evidence that they meet at least 65, 115 or 165 evidence requirements respectively). In April 2010, the UK Commission for Employment and Skills took over strategic ownership of IIP and was keen to understand the differences made by New Choices. The overall aim of this research is to identify the impact that the New Choices approach has had on perceptions and take up of IIP, with a view to informing future strategy for IIP and contributing to meeting longer-term objectives for IIP. The project methodology included: preliminary research (familiarisation with the IIP literature review, a review of management information, and discussions with key stakeholders); an e-survey of employers engaged with the New Choices approach; and 15 employer case studies to add depth to the understanding of how New Choices was working in practice. The New Choices approach was introduced across the UK in May 2009 (after being piloted in Scotland and some parts of England), so at the time of writing has been operational for less than two years. This is a relatively short period of time in which to judge the impact of the New Choices approach, as further benefits are likely to accrue over the long term. As such, this review has not identified significant direct benefits experienced by employers who have followed the extended framework and achieved a Bronze, Silver or Gold award level, though it has identified some changes that may contribute to increased business efficiency" - page i

SN 2005cs in M51 I. The first month of evolution of a subluminous SN II plateau

Early time optical observations of supernova (SN) 2005cs in the Whirlpool Galaxy (M51), are reported. Photometric data suggest that SN 2005cs is a moderately under-luminous Type II plateau supernova (SN IIP). The SN was unusually blue at early epochs (U-B ~ -0.9 about three days after explosion) which indicates very high continuum temperatures. The spectra show relatively narrow P-Cygni features, suggesting ejecta velocities lower than observed in more typical SNe IIP. The earliest spectra show weak absorption features in the blue wing of the He I 5876A absorption component and, less clearly, of H$\beta$ and H$\alpha$. Based on spectral modelling, two different interpretations can be proposed: these features may either be due to high-velocity H and He I components, or (more likely) be produced by different ions (N II, Si II). Analogies with the low-luminosity, $^{56}$Ni-poor, low-velocity SNe IIP are also discussed. While a more extended spectral coverage is necessary in order to determine accurately the properties of the progenitor star, published estimates of the progenitor mass seem not to be consistent with stellar evolution models.Comment: 12 pages, 11 Figures. Accepted for publication in MNRA