1,417 research outputs found
The Source of Maser Emission W33C (G12.8-0.2)
Results of observations of the maser sources toward the W33C region
(G12.8-0.2) carried out on the 22-m radio telescope of the Pushchino Radio
Astronomy Observatory in the 1.35-cm H2O line and on the Large radio telescope
in Nancay (France) in the main (1665 and 1667 MHz) and satellite (1612 and 1720
MHz) OH lines are reported. Multiple, strongly variable short-lived H2O
emission features were detected in a broad interval of radial velocities, from
-7 to 55 km/s. OH maser emission in the 1667-MHz line was discovered in a
velocity range of 35-41 km/s. Stokes parameters of maser emission in the main
OH lines 1665 and 1667 MHz were measured. Zeeman splitting was detected in the
1665-MHz line at 33.4 and 39.4 km/s and in the 1667 MHz line only at 39.4 km/s.
The magnetic field intensity was estimated. A appreciable variability of Zeeman
splitting components was observed at 39 and 39.8 km/s in both main lines. The
extended spectrum and fast variability of the H2O maser emission together with
the variability of the Zeeman splitting components in the main OH lines can be
due to the composite clumpy structure of the molecular cloud and to the
presence in it of large-scale rotation and bipolar outflow as well as of
turbulent motions of material.Comment: 7 pages, 2 tables, 8 figures, accepted by Astronomicheskii Zhurnal
(Astronomy Reports
Relating Eye-Tracking Measures With Changes In Knowledge on Search Tasks
We conducted an eye-tracking study where 30 participants performed searches
on the web. We measured their topical knowledge before and after each task.
Their eye-fixations were labelled as "reading" or "scanning". The series of
reading fixations in a line, called "reading-sequences" were characterized by
their length in pixels, fixation duration, and the number of fixations making
up the sequence. We hypothesize that differences in knowledge-change of
participants are reflected in their eye-tracking measures related to reading.
Our results show that the participants with higher change in knowledge differ
significantly in terms of their total reading-sequence-length,
reading-sequence-duration, and number of reading fixations, when compared to
participants with lower knowledge-change.Comment: ACM Symposium on Eye Tracking Research and Applications (ETRA), June
14-17, 2018, Warsaw, Polan
On autonomic platform-as-a-service: characterisation and conceptual model
In this position paper, we envision a Platform-as-a-Service conceptual and architectural solution for large-scale and data intensive applications. Our architectural approach is based on autonomic principles, therefore, its ultimate goal is to reduce human intervention, the cost, and the perceived complexity by enabling the autonomic platform to manage such applications itself in accordance with highlevel policies. Such policies allow the platform to (i) interpret the application specifications; (ii) to map the specifications onto the target computing infrastructure, so that the applications are executed and their Quality of Service (QoS), as specified in their SLA, enforced; and, most importantly, (iii) to adapt automatically such previously established mappings when unexpected behaviours violate the expected. Such adaptations may involve modifications in the arrangement of the computational infrastructure, i.e. by re-designing a different communication network topology that dictates how computational resources interact, or even the live-migration to a different computational infrastructure. The ultimate goal of these challenges is to (de)provision computational machines, storage and networking links and their required topologies in order to supply for the application the virtualised infrastructure that better meets the SLAs. Generic architectural blueprints and principles have been provided for designing and implementing an autonomic computing system.We revisit them in order to provide a customised and specific viewfor PaaS platforms and integrate emerging paradigms such as DevOps for automate deployments, Monitoring as a Service for accurate and large-scale monitoring, or well-known formalisms such as Petri Nets for building performance models
Análisis de los diferentes tipos de desvulcanizado en la caracterización de nuevos materiales elastoméricos formados por la mezcla de estireno butadieno-caucho natural y mezclados con neumáticos fuera de uso (GTR)
En este artĂculo se propone la creaciĂłn de un nuevomaterial Ăştil para la industria a partir de la mezcla con rodillos de dos elastĂłmeros vĂrgenes al 50% (estireno-butadieno (SBR) y caucho natural (NR)) con neumáticos fuera de uso (GTR). Estos neumáticos han sido previamente desvulcanizados siguiendo diversas tĂ©cnicas, las cuales serán analizadas en este artĂculo, para posteriormente realizarse su mezcla con el elastĂłmero virgen SBR/NR y los aditivos correspondiente, volviĂ©ndose a vulcanizar este nuevo material con el fin de que alcance las propiedades mecánicas, tĂ©rmicas y de estructura que permitan su utilizaciĂłn en la industria. Concretamente se han analizado tres tipos de muestras; una primera formada por el elastĂłmero virgen (SBR/NR), una segunda añadiendo al SBR/NR, GTR en la proporciĂłn de 20 phr (parts perhundred rubber), y una tercera añadiendo al SBR/NR, GTR en la proporciĂłn de 40 phr (en los ensayos mecánicos se han utilizado más porcentajes, con el finde proporcionar mayor fiabilidad en los resultados). El GTR recibido ha sido desvulcanizado aplicando diferentes tĂ©cnicas: sin desvulcanizar (dn); desvulcanizado mecánicamente (dm); desvulcanizado quĂmica y mecánicamente (dcm); y desvulcanizado mediante microondas (dmw). Todos estos compuestos han sido ensayados con diferentes pruebas; Mecánicas, de Densidad de entrecruzamiento, de Análisis TĂ©rmicogravimĂ©trico y del Ensayo de MicroscopĂa
Internet-based psychoeducation for bipolar disorder: a qualitative analysis of feasibility, acceptability and impact
<p>Background: In a recent exploratory randomised trial we found that a novel, internet-based psychoeducation programme for bipolar disorder (Beating Bipolar) was relatively easy to deliver and had a modest effect on psychological quality of life. We sought to explore the experiences of participants with respect to feasibility, acceptability and impact of Beating Bipolar.</p>
<p>Methods: Participants were invited to take part in a semi-structured interview. Thematic analysis techniques were employed; to explore and describe participants’ experiences, the data were analysed for emerging themes which were identified and coded.</p>
<p>Results: The programme was feasible to deliver and acceptable to participants where they felt comfortable using a computer. It was found to impact upon insight into illness, health behaviour, personal routines and positive attitudes towards medication. Many participants regarded the programme as likely to be most beneficial for those recently diagnosed.</p>
<p>Conclusions: An online psychoeducation package for bipolar disorder, such as Beating Bipolar, is feasible and acceptable to patients, has a positive impact on self-management behaviours and may be particularly suited to early intervention. Alternative (non-internet) formats should also be made available to patients.</p>
Protein design to new vaccines development : where is the limit?
There is no broadly effective vaccine available for Neisseria meningitidis serotype B (MenB) since the capsular polysaccharide,on which vaccines against the other pathogenic serotypes are based, is structurally identical to human fetal brain-cell adhesion molecules.Thus, immune tolerance renders the MenB capsule poorly immunogenic, and the fear of generating autoimmunity hampers its use in a vaccine1
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