SAM 2 measurements of the polar stratospheric aerosol. Volume 9: October 1982 - April 1983

The Stratospheric Aerosol Measurement (SAM) II sensor aboard Nimbus 7 is providing 1.0 micron extinction measurements of Antarctic and Arctic stratospheric aerosols with a vertical resolution of 1 km. Representative examples and weekly averages including corresponding temperature profiles provided by NOAA for the time and place of each SAM II measurement are presented. Contours of aerosol extinction as a function of altitude and longitude or time are plotted, and aerosol optical depths are calculated for each week. Typical values of aerosol extinction and stratospheric optical depth in the Arctic are unusually large due to the presence of material from the El Chichon volcano eruption in the Spring of 1982. For example, the optical depth peaked at 0.068, more than 50 times background values. Typical values of aerosol extinction and stratospheric optical depth in the Antarctic varied considerably during this period due to the transport and arrival of the material from the El Chichon eruption. For example, the stratospheric optical depth varied from 0.002 in October 1982, to 0.021 in January 1983. Polar stratospheric clouds were observed during the Arctic winter, as expected. A representative sample is provided of the ninth 6-month period of data to be used in atmospheric and climatic studies

Thermocouple installation

A thermocouple assembly which includes a plug having a pair of small diameter holes near one end thereof which are spaced a small distance apart to leave a thin quantity of plug material between the holes is presented. There are a pair of thermocouple wires extending through the different holes and with the outer ends of the wires joined to the thin quantity of plug material which lies between the holes to form a thermocouple junction

Phase field theory of interfaces and crystal nucleation in a eutectic system of fcc structure: I. Transitions in the one-phase liquid region

The published version of this Article can be accessed from the link below - Copyright @ 2007 American Institute of PhysicsThe phase field theory (PFT) has been applied to predict equilibrium interfacial properties and nucleation barrier in the binary eutectic system Ag-Cu using double well and interpolation functions deduced from a Ginzburg-Landau expansion that considers fcc (face centered cubic) crystal symmetries. The temperature and composition dependent free energies of the liquid and solid phases are taken from CALculation of PHAse Diagrams-type calculations. The model parameters of PFT are fixed so as to recover an interface thickness of approximately 1 nm from molecular dynamics simulations and the interfacial free energies from the experimental dihedral angles available for the pure components. A nontrivial temperature and composition dependence for the equilibrium interfacial free energy is observed. Mapping the possible nucleation pathways, we find that the Ag and Cu rich critical fluctuations compete against each other in the neighborhood of the eutectic composition. The Tolman length is positive and shows a maximum as a function of undercooling. The PFT predictions for the critical undercooling are found to be consistent with experimental results. These results support the view that heterogeneous nucleation took place in the undercooling experiments available at present. We also present calculations using the classical droplet model classical nucleation theory (CNT) and a phenomenological diffuse interface theory (DIT). While the predictions of the CNT with a purely entropic interfacial free energy underestimate the critical undercooling, the DIT results appear to be in a reasonable agreement with the PFT predictions.This work has been supported by the Hungarian Academy of Sciences under Contract No. OTKA-K-62588 and by the ESA PECS Contract Nos. 98005, 98021, and 98043

‘Overwhelmed and powerless’: Staff perspectives on mother-infant separations in English prisons

Imprisoned mothers are at increased risk for poor psychological health and psychological distress when separated from their children, so staff need to be highly skilled to support the women. However, there is a paucity of research focusing on staff experiences around sensitive issues such as mother-child separation. This study aimed to understand the challenges facing staff and how these might be addressed. This qualitative interview study explored the views and experiences of 24 prison-based staff in England working with female prisoners separated from their infants. Staff emphasised the challenges of working with separated mothers, specifically the emotional impact of this work, and the impact of the wider criminal justice system on their sense of agency. A focus on the experience of separation highlights the broader problem of incarcerating women in general. Reducing the number of mother-child separations would mitigate the impact on both women and staff

Mother-infant separations in prison. A systematic attachment-focused policy review

Mothers in prison separated from their young children are an overlooked group. Attachment theory could provide a useful model to underpin interventions and better support women affected by separation from their infants. Current policy draws on a limited body of evidence and research has developed considerably since its first design. This review systematically searched all relevant UK prison policy and government documents with regards to mother and child separation in prison and analysed the extent to which these documents draw on attachment theory. Following initial searches, 58 documents were thematically analysed. Attachment was implicitly referred to in most documents but only explicitly mentioned in four. Global themes identified included ‘separation as trauma’. However, document groups varied in focusing either on the mother or the child and there were no joint perspectives. Developing and researching specific attachment-informed interventions might be one way forward as would further attachment-based research in this area

Mother-infant separations in prison. A systematic attachment-focused review of the academic and grey literature

This review systematically searched UK academic and grey literature in relation to mother and child separation in prison. Attachment theory is referred to in current prison policy for mothers (PSO 4801, 2008), and could provide a framework linking policy and practice. Reviewing grey literature provided an opportunity to explore practice-based literature. 24 academic papers and 51 grey documents were reviewed. Use of attachment theory in the academic literature varied according to discipline, ranging from extensive use to no use. There was greater use of attachment theory in the grey literature. Despite linguistic differences, all documents highlighted the detrimental impact of separation on imprisoned mothers. However, specificity was lacking regarding support for mothers, and staff needs were overlooked. Given its use across the sparse research and practice literature, and its basis for policy, attachment theory could underpin theoretically informed support for imprisoned mothers separated from their infants and staff who support them

Seeking Froebel's mother songs in daycare for babies

In 2013, we undertook a small exploratory study that involved baby room practitioners who work in full daycare settings in southeast England caring for babies from 3 weeks to around 18 months of age. We had received funding from The Froebel Trust to examine whether Froebel’s principles for early childhood education and care and the particular emphasis he placed on singing with babies and young children resonated with contemporary practices in settings that did not express any affiliation to Froebelian ideas. We adopted an interpretative approach, used predominantly narrative methods for data collection (including practitioners’ reflections on filmed observations of their practice) and applied thematic methods for qualitative data analysis. Our enquiry was framed and guided by findings from our previous research into the processes and practice of baby rooms (Goouch and Powell 2013) and a rapid review of literature about the benefits of singing to/with babies and Froebel’s writings on the subject. Our initial conceptual framework was underpinned by four propositions, which guided our research questions and design for the study. Although this pilot left us with many questions requiring further exploration, we were reasonably confident that our four propositions had been affirmed by our enquiries. Namely, that singing can facilitate intimacy; supports language development; can be a means to improve relationships with families; and enhances the wellbeing of practitioners during their working day. But we also discovered that singing is not overtly promoted in policy nor are its multiple facets and benefits necessarily recognised in practice. Consequently, although the practitioners involved frequently demonstrated that they broadly concurred with Froebel’s ideas about the value of singing, they did so only when it was drawn to their attention. Also they were largely unaware of Froebel’s principles and any resonance was coincidental. But they were fascinated by the enquiry, keen to learn about research on singing and Froebel’s beliefs, enthusiastic in their engagement in the project and replete with suggestions about how they could explore singing as a tool for connecting with babies’ parents and home lives

Determination of ASPS performance for large payloads in the shuttle orbiter disturbance environment

A high fidelity simulation of the annular suspension and pointing system (ASPS), its payload, and the shuttle orbiter was used to define the worst case orientations of the ASPS and its payload for the various vehicle disturbances, and to determine the performance capability of the ASPS under these conditions. The most demanding and largest proposed payload, the Solar Optical Telescope was selected for study. It was found that, in all cases, the ASPS more than satisfied the payload's requirements. It is concluded that, to satisfy facility class payload requirements, the ASPS or a shuttle orbiter free-drift mode (control system off) should be utilized

Internal Migration and Regional Population Dynamics in Europe: Estonia Case Study

Estonia has experienced a long-lasting and strong influence of international migration on regional population growth. Post-war immigrants account for about 36 per cent of the total population, and are concentrated in larger cities of Northern Estonia. Regionally, the relative proportions of the native-born and immigrant origin sub-populations are important for the understanding of population change and internal migration flows in the 1980-1990s. In Estonia, the quality of migration data requires careful assessment. The preservation of Soviet-type record-keeping has reduced data quality in the 1990s, already low, and use of the data should keep data quality problems in mind. Otherwise, false conclusions can be reached. To describe internal migration patterns, it has proved technically feasible and very useful to disaggregate the county population into rural and urban components, and correspondingly, the migration flows into four directions (urban-urban, urban-rural, rural-urban and rural-rural). During the 1980s the pattern of population growth and internal migration has changed in Estonia. Reflecting the turnaround in long-term population processes, migration development reached the advanced stage with more or less regionally balanced in- and out-migration flows and decreasing importance of net migration. Accordingly, to understand current trends and patterns, explanations must be sought from the 1980s which has served a starting point for the present trends rather than from the period of economic transition in the 1990s. As a part of the turnaround, the century-long persistent rural depopulation has come to an end and the moderate growth has started reflecting natural population increase as well as deurbanization. In the 1980s two developments have occurred in parallel: migratory increase of rural population led by a deurbanizing native-born population, and continued urban population growth as a result of the population momentum of pre-transition immigrants. In future decades, the urban deconcentration will probably be the underlying trend in Estonia. In Estonia, noticeable proportion of territory and population is located in islands. However, the island population does not show any systematic difference in the type of internal migration. Particularly, the depopulation of island populations, observed in several comparable European cases, is not occurring. Each life-course stage was found to have its specific migration pattern, more stable than the pattern for the total population. In many cases the changes of internal migration are determined by the change in the proportion of population in different life-course stages. Additionally, the life-course approach has been useful in demonstrating the features of the present Estonian internal migration pattern which appear closer to the countries of comparable in demographic development, more or less regardless of the significant differences in the level of economic development. Among life-course groups, in Estonia the older working age population was characterized by the strongest deurbanization intensities in 1995. The same group has also undergone the largest modification of migration pattern during the economic transition (1987-1995)

Resisting the Trauma Story: Ethical Concerns in the Oral History Archive

This short article presents an oral history project undertaken with refugees resettled in Southwest Virginia. From this project has emerged an understanding of refugees as curators of a personal archive of stories. A birth-to-present oral history approach can resist the reductive trauma narratives refugees are often expected to tell, yet oral historians and archivists must also be aware of the story told by the archive framework itself. The authors explore the ethical challenges of amplifying oral histories from refugees in a way that inspires action without centering the trauma story, and leave readers with questions for reflection