Optical and X-ray properties of the RIXOS AGN: II - Emission lines

We present the optical and UV emission line properties of 160 X-ray selected AGN taken from the RIXOS survey (including Halpha, Hbeta, [OIII]5007, MgII2798 and CIII]1909). This sample is believed to contain a mixture of absorbed and unabsorbed objects, with column densities up to 4e21 cm-2. Although the distribution of the [OIII] EW for the RIXOS AGN is typical of optically selected samples, the Balmer line EWs are relatively low. This is consistent with the presence of a dust absorber between the broad and narrow line regions (eg. a molecular torus), and intrinsically weak optical line emission. We find Baldwin effects in CIII] and MgII, and a positive response of the MgII line to its ionizing continuum. There is a strong correlation between the EW and FWHM of MgII, which may be similar to that seen in other samples for Hbeta. We demonstrate that this is consistent with models which suggest two line-emitting zones, a `very broad line region' (VBLR) and an `intermediate line region' (ILR). The correlation between EW and FWHM in MgII may be a physical characteristic of the ILR or it may reflect a geometric dependence. We found no correlation between the Hbeta FWHM and the slope of the X-ray spectrum, however this may be due to the effects of dust absorption which suppresses the broad Hbeta component, masking any relationship. The Halpha FWHM does tend to be narrow when alpha_X is soft, and broadens as alpha_X hardens, although the formal probability for this correlation is low (91 per cent). If the distribution of alpha_X in the RIXOS sample reflects the level of intrinsic absorption in these AGN, the data suggest a possible link between the velocity of the Balmer line-emitting region and the amount of absorbing material beyond.Comment: 29 pages, 14 figures, to be published in Monthly Notices of the Royal Astronomical Society. Also available from http://www.mssl.ucl.ac.uk/www_astro/preprints/preprints.htm

Methodological developments in violence research

Über Jahrzehnte wurde Gewalt durch Interviews mit Betroffenen oder Tätern, durch teilnehmende Beobachtung oder Gewaltstatistiken untersucht, meist unter Verwendung entweder qualitativer oder quantitativer Analysemethoden. Seit der Jahrhundertwende stehen Forschenden eine Reihe neuer Ansätze zur Verfügung: Es gibt immer mehr Videoaufnahmen von gewaltsamen Ereignissen, Mixed Methods-Ansätze werden stetig weiterentwickelt und durch Computational Social Sciences finden Big Data-Ansätze Einzug in immer mehr Forschungsfelder. Diese drei Entwicklungen bieten großes Potenzial für die quantitative und qualitative Gewaltforschung. Der vorliegende Beitrag diskutiert Videodatenanalyse, Triangulation und Mixed Methods-Ansätze sowie Big Data und bespricht den gegenwärtigen und zukünftigen Einfluss der genannten Entwicklungen auf das Forschungsfeld. Das Augenmerk liegt besonders darauf, (1) wie neuere Videodaten genutzt werden können, um Gewalt zu untersuchen und wo ihre Vor- und Nachteile liegen, (2) wie Triangulation und Mixed Methods-Ansätze umfassendere Analysen und theoretische Verknüpfungen in der Gewaltforschung ermöglichen und (3) wo Anwendungen von Big Data und Computational Social Science in der Gewaltforschung liegen können.For decades violence research has relied on interviews with victims and perpetrators, on participant observation, and on survey methods, and most studies focused on either qualitative or quantitative analytic strategies. Since the turn of the millennium, researchers can draw on a range of new approaches: there are increasing amounts of video data of violent incidents, triangulation and mixed methods approaches become ever more sophisticated, and computational social sciences introduce big data analysis to more and more research fields. These three developments hold great potential for quantitative and qualitative violence research. This paper discusses video data analysis, mixed methods, and big data in the context of current and future violence research. Specific focus lies on (1) potentials and challenges of new video data for studying violence; (2) the role of triangulation and mixed methods in enabling more comprehensive violence research from multiple theoretical perspectives, and (3) what potential uses of big data and computational social science in violence research may look like

The Cyber Trust Tension in E-Government: Balancing Identity, Privacy, Security

The growing use of the Internet and other information and communication technologies (ICTs) in e-government services raises important new issues of 'cyber trust' that could have a significant influence on governance structures and practices in the future. This paper argues that at the heart of debates about cyber trust in e-government is a 'trust tension' between the need to collect data on individuals as the basis for providing services and fears about the inappropriate use of personal information gathered, stored, and analysed using ICTs. It draws on studies of experiences in e-commerce and e-business, as well as e-government, to illuminate the nature of cyber trust and its wider social dimensions, including the main related challenges faced in e-government and some strategies, products and services for dealing with them

Análisis teórico experimental de elementos estructurales locales de embarcaciones menores base de grúa apg-103

En este documento se estudia las deformaciones producidas por la acción de pesos en un modelo de base de grúa de una barcaza, utilizando extensómetros de resistencia eléctrica. Presenta la forma como se calculó para obtener la fuerza axial. Desarrolla además un análisis dimensional del problema para determinar la carga que soportaría el prototipo

ATYPICAL FEMORAL FRACTURES: CASE SERIES AND PROPOSAL OF AN ALGORITHM FOR MANAGEMENT

Objective: To purpose a practical tool for approaching atypical femoral fractures (AFF) considering the current evidences and experience of a multidisciplinary study group. Material and Methods: We examined a series of clinical cases with a diagnosis of AFF according with 2013 ASBMR criteria. After a consensus of our study group, we purposed an algorithm in order to improve the knowledge in terms of early diagnosis and conservative and surgical treatment. Results: From the analysis of 30 clinical cases of AFF (28 female and 2 male, mean aged 76.06 ± 6.56 years) our group debated on 4 main topics regarding the AFF: diagnosis, evaluation of bone turnover, treatment of the fractured femur, and management of the contralateral femur. These clinical issues represented the 4 steps of our proposed algorithm. Figure 1. AFF complicated by an intraoperative fracture and subsequent infection. A) Pre-operative X-ray showing an incomplete AFF in a very bowed femur; B) Reduction and synthesis of the intraoperative fracture using a locking plate; C) External fixation after removal of locking plate because of the development of an infection. Conclusions: A multidisciplinary approach is mandatory in order to face up the AFF. Based on our clinical experience, we proposed a practical guide for diagnosis and management of AFF. However, there is a lack of adequate evidences on treatment of AFF and further studies are needed. Osteoporos In

P845 ATYPICAL FEMORAL FRACTURES: CASE SERIES AND PROPOSAL OF AN ALGORITHM FOR MANAGEMENT

Objective: To purpose a practical tool for approaching atypical femoral fractures (AFF) considering the current evidences and experience of a multidisciplinary study group. Material and Methods: We examined a series of clinical cases with a diagnosis of AFF according with 2013 ASBMR criteria. After a consensus of our study group, we purposed an algorithm in order to improve the knowledge in terms of early diagnosis and conservative and surgical treatment. Results: From the analysis of 30 clinical cases of AFF (28 female and 2 male, mean aged 76.06 ± 6.56 years) our group debated on 4 main topics regarding the AFF: diagnosis, evaluation of bone turnover, treatment of the fractured femur, and management of the contralateral femur. These clinical issues represented the 4 steps of our proposed algorithm. Figure 1. AFF complicated by an intraoperative fracture and subsequent infection. A) Pre-operative X-ray showing an incomplete AFF in a very bowed femur; B) Reduction and synthesis of the intraoperative fracture using a locking plate; C) External fixation after removal of locking plate because of the development of an infection. Conclusions: A multidisciplinary approach is mandatory in order to face up the AFF. Based on our clinical experience, we proposed a practical guide for diagnosis and management of AFF. However, there is a lack of adequate evidences on treatment of AFF and further studies are needed. Osteoporos In

Phyllochron and leaf lifespan of four C4 forage grasses cultivated in association with trees.

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