Dynamic concept composition for zero-example event detection

© Copyright 2016, Association for the Advancement of Artificial Intelligence (www.aaai.org). All rights reserved. In this paper, we focus on automatically detecting events in unconstrained videos without the use of any visual training exemplars. In principle, zero-shot learning makes it possible to train an event detection model based on the assumption that events (e.g. birthday party) can be described by multiple mid-level semantic concepts (e.g. "blowing candle", "birthday cake"). Towards this goal, we first pre-Train a bundle of concept classifiers using data from other sources. Then we evaluate the semantic correlation of each concept w.r.t. the event of interest and pick up the relevant concept classifiers, which are applied on all test videos to get multiple prediction score vectors. While most existing systems combine the predictions of the concept classifiers with fixed weights, we propose to learn the optimal weights of the concept classifiers for each testing video by exploring a set of online available videos with freeform text descriptions of their content. To validate the effectiveness of the proposed approach, we have conducted extensive experiments on the latest TRECVID MEDTest 2014, MEDTest 2013 and CCV dataset. The experimental results confirm the superiority of the proposed approach

Current–Voltage Characteristics in Individual Polypyrrole Nanotube, Poly(3,4-ethylenedioxythiophene) Nanowire, Polyaniline Nanotube, and CdS Nanorope

In this paper, we focus on current–voltage (I–V) characteristics in several kinds of quasi-one-dimensional (quasi-1D) nanofibers to investigate their electronic transport properties covering a wide temperature range from 300 down to 2 K. Since the complex structures composed of ordered conductive regions in series with disordered barriers in conducting polymer nanotubes/wires and CdS nanowires, all measured nonlinearI–Vcharacteristics show temperature and field-dependent features and are well fitted to the extended fluctuation-induced tunneling and thermal excitation model (Kaiser expression). However, we find that there are surprisingly similar deviations emerged between theI–Vdata and fitting curves at the low bias voltages and low temperatures, which can be possibly ascribed to the electron–electron interaction in such quasi-1D systems with inhomogeneous nanostructures

Current–Voltage Characteristics in Individual Polypyrrole Nanotube, Poly(3,4-ethylenedioxythiophene) Nanowire, Polyaniline Nanotube, and CdS Nanorope

In this paper, we focus on current–voltage (I–V) characteristics in several kinds of quasi-one-dimensional (quasi-1D) nanofibers to investigate their electronic transport properties covering a wide temperature range from 300 down to 2 K. Since the complex structures composed of ordered conductive regions in series with disordered barriers in conducting polymer nanotubes/wires and CdS nanowires, all measured nonlinearI–Vcharacteristics show temperature and field-dependent features and are well fitted to the extended fluctuation-induced tunneling and thermal excitation model (Kaiser expression). However, we find that there are surprisingly similar deviations emerged between theI–Vdata and fitting curves at the low bias voltages and low temperatures, which can be possibly ascribed to the electron–electron interaction in such quasi-1D systems with inhomogeneous nanostructures

The need for children's advocacy centres : hearing the voices of children

Children and young people (CYP) can be empowered to take on roles as agents of change in their own communities. CYP want to be heard and should be actively involved in the coproduction, design and development of services aimed at them to ensure that the resulting services are acceptable and accessible. Little analysis of the framing and discourse of coproduction in different contexts has been undertaken. Building on Children’s Advocacy Centre models from the United States of America (which are held in high esteem by local communities), there is perceived value of such a centre in the UK. A service development initiative was designed to work with children from Greater Manchester (UK) to determine the potential for the establishment of a children’s advocacy centre in the North of England. This report presents the design and outcome of the initiative and contributes to the literature on the co-production of such service development projects with CYP, notably the means of achieving that outcome. Recommendations are made for the piloting of an Advocacy House model in the UK with collaborative efforts between CYP as well as health, education, law enforcement, social care providers, charities and voluntary groups. A community-inclusive partnership, underpinned by the principles of co-production and co-design, is integral to the further development of this pilot

New mobilities across the lifecourse: A framework for analysing demographically-linked drivers of migration

Date of acceptance: 17/02/2015Taking the life course as the central concern, the authors set out a conceptual framework and define some key research questions for a programme of research that explores how the linked lives of mobile people are situated in time–space within the economic, social, and cultural structures of contemporary society. Drawing on methodologically innovative techniques, these perspectives can offer new insights into the changing nature and meanings of migration across the life course.Publisher PDFPeer reviewe

DENTES DUPLOS: A IMPORTÂNCIA DO DIAGNÓSTICO PRECOCE

Introdução: Dentes duplos são anomalias da formação dentária decorrentes da união de dois germes dentários (fusão) ou da tentativa de divisão destes (geminação). A fusão pode ocorrer entre dois dentes normais ou entre um dente normal e outro supranumerário, é mais frequente na dentição decídua, sendo mais observada em incisivos e caninos, com maior frequência nos incisivos inferiores

Electrical Conductivity Studies on Individual Conjugated Polymer Nanowires: Two-Probe and Four-Probe Results

<p>Abstract</p> <p>Two- and four-probe electrical measurements on individual conjugated polymer nanowires with different diameters ranging from 20 to 190 nm have been performed to study their conductivity and nanocontact resistance. The two-probe results reveal that all the measured polymer nanowires with different diameters are semiconducting. However, the four-probe results show that the measured polymer nanowires with diameters of 190, 95&#8211;100, 35&#8211;40 and 20&#8211;25 nm are lying in the insulating, critical, metallic and insulting regimes of metal&#8211;insulator transition, respectively. The 35&#8211;40 nm nanowire displays a metal&#8211;insulator transition at around 35 K. In addition, it was found that the nanocontact resistance is in the magnitude of 10⁴&#937; at room temperature, which is comparable to the intrinsic resistance of the nanowires. These results demonstrate that four-probe electrical measurement is necessary to explore the intrinsic electronic transport properties of isolated nanowires, especially in the case of metallic nanowires, because the metallic nature of the measured nanowires may be coved by the nanocontact resistance that cannot be excluded by a two-probe technique.</p

Observational cohort study with internal and external validation of a predictive tool for identification of children in need of hospital admission from the emergency department : the Paediatric Admission Guidance in the Emergency department (PAGE) score

Objectives: To devise an assessment tool to aid discharge and admission decision making in relation to children and young people in hospital urgent and emergency care facilities, and thereby improve the quality of care that patients receive, using a clinical prediction modelling approach Design: Observational cohort study with internal and external validation of a predictive tool Setting: Two general emergency departments and an urgent care centre in the North of England. Participants: The eligibility criteria were children and young people 0-16 years of age who attended one of the three hospital sites within one NHS Trust. Children were excluded if they opted out of the study, were brought to the emergency department (ED) following their death in the community, or arrived in cardiac arrest when the heart rate and respiratory rate would be unmeasurable. Main outcome measures: Admission or discharge. A participant was defined as being admitted to hospital if they left the ED to enter the hospital for further assessment, (including being admitted to an observation and assessment unit or hospital ward), either on first presentation or with the same complaint within seven days. Those who were not admitted were defined as having been discharged. Results: The study collected data on 36365 participants. 15328 participants were included in the final analysis cohort (21045 observations) and 17710 participants were included in the validation cohort (23262 observations). There were 14 variables entered into the regression analysis. Of the 13 that remained in the final model, 10 were present in all 500 bootstraps. The resulting Paediatric Admission Guidance in the Emergency department (PAGE) score demonstrated good internal validity. The C-index (AUROC) was 0.779 (95% CI 0.772 to 0.786). Conclusions: For units without the immediate availability of paediatricians the PAGE score can assist staff to determine risk of admission. Cut off values will need to be adjusted to local circumstance

The Paediatric Admission Guidance in the Emergency Department (PAGE) supporting documentation

Funded by the National Institute for Health Research (NIHR), the study that led to the production of the Paediatric Admission Guidance in the Emergency Department (PAGE) tool was designed to support better decision-making in paediatric emergency departments about whether children need to be admitted to hospital or can be discharged home safely.The study was conducted over more than 12 months in three dissimilar emergency departments and an urgent care centre. A partnership of the University of Salford, the University of Manchester, and the University of Leicester (and Leicester Hospitals) together with the Northern Care Alliance NHS Group completed the study which has moved into a reporting and dissemination phase including the publication of supporting documentation.A huge sample of 44,501 children and young people participated in this study which has allowed robust analysis of the factors that exert the greatest impact on predicting the need to admit or the safety of discharging children who attend such departments. Moreover, the diversity of the departments in the study indicates that the PAGE instrument (tool) should be effective across the country in a variety of emergency department facilities. PAGE was the highest recruiting research study in England in 2018-2019, and is the highest recruiting paediatric study and third highest recruiting study of any specialty in the history of the whole National Institute for Health Research Clinical Research Network.The supporting documentation includes:1. What is PAGE?2. PAGE - comparison with other scores and systems3. PAGE - cut point consideration