High-resolution imaging spectroscopy of two micro-pores and an arch filament system in a small emerging-flux region

Aims. The purpose of this investigation is to characterize the temporal evolution of an emerging flux region, the associated photospheric and chromospheric flow fields, and the properties of the accompanying arch filament system. Methods. This study is based on imaging spectroscopy with the G\"ottingen Fabry-P\'erot Interferometer at the Vacuum Tower Telescope, on 2008 August 7. Cloud model (CM) inversions of line scans in the strong chromospheric absorption H$\alpha$ line yielded CM parameters, which describe the cool plasma contained in the arch filament system. Results. The observations cover the decay and convergence of two micro-pores with diameters of less than one arcsecond and provide decay rates for intensity and area. The photospheric horizontal flow speed is suppressed near the two micro-pores indicating that the magnetic field is sufficiently strong to affect the convective energy transport. The micro-pores are accompanied by an arch filament system, where small-scale loops connect two regions with H$\alpha$ line-core brightenings containing an emerging flux region with opposite polarities. The chromospheric velocity of the cloud material is predominantly directed downwards near the footpoints of the loops with velocities of up to 12 km/s, whereas loop tops show upward motions of about 3 km/s. Conclusions. Micro-pores are the smallest magnetic field concentrations leaving a photometric signature in the photosphere. In the observed case, they are accompanied by a miniature arch filament system indicative of newly emerging flux in the form of $\Omega$-loops. Flux emergence and decay take place on a time-scale of about two days, whereas the photometric decay of the micro-pores is much more rapid (a few hours), which is consistent with the incipient submergence of $\Omega$-loops. The results are representative for the smallest emerging flux regions still recognizable as such.Comment: 15 pages, 16 figures, 3 tables, published in A&

The meaning of different forms of structural myocardial injury, immune response and timing of infarct necrosis and cardiac repair

Although a decline in the all-cause and cardiac mortality rates following myocardial infarction (MI) during the past 3 decades has been reported, MI is a major cause of death and disability worldwide. From a pathological point of view MI consists in a particular myocardial cell death due to prolonged ischemia. After the onset of myocardial ischemia, cell death is not immediate, but takes a finite period of time to develop. Once complete myocytes’ necrosis has occurred, a process leading to a healed infarction takes place. In fact, MI is a dynamic process that begins with the transition from reversible to irreversible ischemic injury and culminates in the replacement of dead myocardium by a fibrous scar. The pathobiological mechanisms underlying this process are very complex, involving an inflammatory response by several pathways, and pose a major challenge to ability to improve our knowledge. An improved understanding of the pathobiology of cardiac repair after MI and further studies of its underlying mechanisms provide avenues for the development of future strategies directed toward the identification of novel therapies. The chronologic dating of MI is of great importance both to clinical and forensic investigation, that is, the ability to create a theoretical timeline upon which either clinicians or forensic pathologists may increase their ability to estimate the time of MI. Aging of MI has very important practical implications in clinical practice since, based on the chronological dating of MI, attractive alternatives to solve therapeutic strategies in the various phases of MI are developing

Computer-aided Melody Note Transcription Using the Tony Software: Accuracy and Efficiency

accepteddate-added: 2015-05-24 19:18:46 +0000 date-modified: 2017-12-28 10:36:36 +0000 keywords: Tony, melody, note, transcription, open source software bdsk-url-1: https://code.soundsoftware.ac.uk/attachments/download/1423/tony-paper_preprint.pdfdate-added: 2015-05-24 19:18:46 +0000 date-modified: 2017-12-28 10:36:36 +0000 keywords: Tony, melody, note, transcription, open source software bdsk-url-1: https://code.soundsoftware.ac.uk/attachments/download/1423/tony-paper_preprint.pdfWe present Tony, a software tool for the interactive an- notation of melodies from monophonic audio recordings, and evaluate its usability and the accuracy of its note extraction method. The scientific study of acoustic performances of melodies, whether sung or played, requires the accurate transcription of notes and pitches. To achieve the desired transcription accuracy for a particular application, researchers manually correct results obtained by automatic methods. Tony is an interactive tool directly aimed at making this correction task efficient. It provides (a) state-of-the art algorithms for pitch and note estimation, (b) visual and auditory feedback for easy error-spotting, (c) an intelligent graphical user interface through which the user can rapidly correct estimation errors, (d) extensive export functions enabling further processing in other applications. We show that Tony’s built in automatic note transcription method compares favourably with existing tools. We report how long it takes to annotate recordings on a set of 96 solo vocal recordings and study the effect of piece, the number of edits made and the annotator’s increasing mastery of the software. Tony is Open Source software, with source code and compiled binaries for Windows, Mac OS X and Linux available from https://code.soundsoftware.ac.uk/projects/tony/

Determinants of health-related lifestyles among university students

AIMS: To investigate students’ health-related lifestyles and to identify barriers and social determinants of healthier lifestyles. METHODS: An online survey, two focus groups, and three in-depth interviews across 2014/15. A stratified by School size and random sample [n=468] of university students answered a 67-item questionnaire comprising six scales: RAPA, REAP-S, CAGE, FTND, SWEMWBS and ad hoc scale for drug use/misuse. Stratified by gender X2 tests were run to test associations/estimate risks and three multivariate Logistic Regression models were adjusted. A thematic approach guided the analysis of qualitative data. RESULTS: 60% of the respondents were insufficiently physically active, 47% had an unbalanced diet and 30% had low mental wellbeing. Alcohol drinkers vs. abstinent were almost equally distributed. 42% of alcohol drinkers reported getting drunk at least once a month. Smokers accounted for 16% of the respondents. Identified risk factors for suboptimal physical activity were: Being a woman, not using the university gym and smoking. For unbalanced diet: low mental wellbeing and drugs use. Poor mental wellbeing was predicted by unbalanced diet, not feeling like shopping and cooking frequently, and a lack of help-seeking behaviour in case of distress. Qualitative analysis revealed seven thematic categories: transition to new life, university environment and systems, finances, academic pressure, health promotion in campus and recommendations. CONCLUSIONS: This study provides robust evidence that the health-related lifestyles of the student population are worrying and suggests that the trend in chronic diseases associated with unhealthy lifestyles sustained over years might be unlikely to change in future generations. University students’ health-related lifestyle is a concern. Nine out of the identified ten predictors of problematic physical activity, nutrition and mental wellbeing, were environmental/societal or institutional barriers. Universities must expand corporate responsibilities to include the promotion of health as part of their core values

Challenges of Utilizing Agricultural Information Sources by Small Scale Farmers in Nasarawa State, Nigeria

This paper discusses the challenges of utilizing agricultural sources by small-scale farmers in Nasarawa State of Central Nigeria.  Poorly trained extension workers contribute significantly to inadequacy of interpersonal communication strategy which lent cognizance to the use of mass media support in conducting information dissemination to farmers in the area.  It was discovered that mass media strategy in the absence of education, material resources, appropriate infrastructure and technical skills was unlikely to eradicate inaccessibility and ineffective information utilization among rural farming community.  There is need for extension managers to improve both the quality and quantity of their extension personnel through continued staff recruitment and training. Keywords: Inter-personal channels; mass media, dissemination of information, persuasion, Johari windows, process of communication

Impact of Class Size on Learning, Behavioral and General Attitudes of Students in Secondary Schools in Abeokuta, Ogun State Nigeria

Poor performance of university undergraduate students has been traced to their poor academic performance and attitudes in secondary schools. There was concern over whether class size was responsible for this. Researches on the effect of class size on academic performance and achievement exist. The study was carried out to investigate the impact of class size on students’ attitude to studies using four (4) selected secondary schools in Abeokuta, Ogun State Nigeria. Possible effect of class size on the general, learning and behavioral attitudes were considered. Its impact was also correlated with effect of other possible factors. Questionnaires were administered to three hundred and sixty students selected evenly from JSS1-SS2 classes in each of the schools. Two of the schools were private while the other two were owned by government. Ten (10) hypotheses were tested in the study. It was found that class size has a highly significant impact on students’ attitudes to studies in secondary school (p\u3c 0.05). It affects students’ attention most strongly, then punctuality, motivation and participation but not the rate of participation and asking or answering questions. The result also revealed that excessive noise is the most common behavioral attitude associated with large classes. Hence, a serious attention should be paid to class size in every educational setting for optimum learning achievement