La variable de helio HD 125823

In part I the behavior of the spectrum between 1908 and 1986 is analysed. The spectral type varied between B2 V and B7 III. This object represents very probably a new type of variables. In part II it is shown, on the basis of 110 Å/mm spectrograms taken at La Plata, that the star varies in spectral type with a period of 8ᵈ8061. Possible mechanisms which might account for this variation are examined. The work reported here has meanwhile appeared in press in the Astrophysical Journal Letters (1968) and Nature 219, 1137 (1968).Asociación Argentina de Astronomí

La variable de helio HD 125823

In part I the behavior of the spectrum between 1908 and 1986 is analysed. The spectral type varied between B2 V and B7 III. This object represents very probably a new type of variables. In part II it is shown, on the basis of 110 Å/mm spectrograms taken at La Plata, that the star varies in spectral type with a period of 8ᵈ8061. Possible mechanisms which might account for this variation are examined. The work reported here has meanwhile appeared in press in the Astrophysical Journal Letters (1968) and Nature 219, 1137 (1968).Asociación Argentina de Astronomí

Implementation of electronic patient clinical records in ambulances in the UK: a national survey.

Background: The roll-out of electronic Patient Clinical Records (ePCR) across UK ambulance services has been an important aspect of modernisation. Electronic Records in Ambulances (ERA) is a two-year study which aims to describe the opportunities and challenges of implementing ePCR and associated technology in emergency ambulances. Our study includes a baseline survey of progress implementing ePCR in all UK ambulance services providing a snapshot of current usage. Methods: We carried out semi-structured telephone interviews with information managers in each ambulance service in the UK. We asked them about the systems in use, the process and current stage of implementation and explored the perceived value of using ePCR. If services did not use ePCR we asked about plans for future introduction. The interviews were transcribed and thematically analysed, by three members of the research team. Results: We completed interviews with 22 managers from 13 services. Implementation varied across the UK. Seven services were using electronic records. Four services had adopted electronic records but, at the time of interview, had reverted to paper with the intention of implementing a new ePCR. Two services still used paper but hoped to move to ePCR in the future. Those who had fully implemented ePCR reported mixed success in terms of staff compliance, and in realising the potential benefits offered by ePCR to link with primary and secondary care

Sustainable change: long-term efforts toward developing a learning organization

Globalization and intensified competition require organizations to change and adapt to dynamic environments in order to stay competitive. This article describes a longitudinal action research study supporting the strategic change of a trading company. The strategic change was accompanied by planned changes in organizational structures and processes, management systems, emerging changes in leadership, and organization members’ attitudes and behaviors, and it was supported by management development activities. Longitudinal data over a 4-year period including participant observation and interviews reveal that a systemic approach, a learning and becoming perspective toward change, trust, an appropriate role perception, and the specific use of management instruments contribute to sustained change that resulted in performance improvements and a move toward a learning organization. We conclude with implications for strategic change and suggestions for further research in this area

Early above- and below-ground responses of subboreal conifer seedlings to various levels of deciduous canopy removal

We examined the growth of understory conifers, following partial or complete deciduous canopy removal, in a field study established in two regions in Canada. In central British Columbia, we studied the responses of three species (Pseudotsuga menziesii var. glauca (Beissn.) Franco, Picea glauca (Moench) Voss x Picea engelmannii Parry ex Engelm., and Abies lasiocarpa (Hook.) Nutt.), and in northwestern Quebec, we studied one species (Abies balsamea (L.) Mill.). Stem and root diameter and height growth were measured 5 years before and 3 years after harvesting. Both root and stem diameter growth increased sharply following release but seedlings showed greater root growth, suggesting that in the short term, improvement in soil resource capture and transport, and presumably stability, may be more important than an increase in stem diameter and height growth. Response was strongly size dependent, which appears to reflect greater demand for soil resources as well as higher light levels and greater tree vigour before release for taller individuals. Growth ratios could not explain the faster response generally attributed to true fir species or the unusual swift response of spruces. Good prerelease vigour of spruces, presumably favoured by deciduous canopies, could explain their rapid response to release

Very Singular Diffusion Equations-Second and Fourth Order Problems

This paper studies singular diffusion equations whose diffusion effect is so strong that the speed of evolution becomes a nonlocal quantity. Typical examples include the total variation flow as well as crystalline flow which are formally of second order. This paper includes fourth order models which are less studied compared with second order models. A typical example of this model is an H−1 gradient flow of total variation. It turns out that such a flow is quite different from the second order total variation flow. For example, we prove that the solution may instantaneously develop jump discontinuity for the fourth order total variation flow by giving an explicit example