149 research outputs found

    The Ratio of Total to Selective Extinction Toward Baade's Window

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    We measure the ratio of total to selective extinction, R_{VI}=A_V/E(V-I), toward Baade's Window by comparing the VIK colors of 132 Baade's Window G and K giants from Tiede, Frogel, & Terndrup with the solar-neighborhood (V-I),(V-K) relation from Bessell & Brett. We find R_{VI}=2.283 +/- 0.016, and show that our measurement has no significant dependence on stellar type from G0 to K4. Adjusting the Paczynski et al. determination of the centroid of the dereddened Baade's Window clump for this revised value of RVIR_{VI}, we find I_{0,RC}=14.43 and (V-I)_{0,RC}=1.058. This implies a distance to the Baade's Window clump of d_{BW} = 8.63 +/- 0.16 kpc, where the error bar takes account of statistical but not systematic uncertainties.Comment: 8 pages, 1 figure, submitted to Ap

    Doppler Parameters in Renal Transplant Dysfunction

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/135678/1/jum2011302169.pd

    Using TRIZ to generate ideas to solve the problem of the shortage of ICT workers

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    With the ever competitive global market swamped with more choices of high-tech gadgets from smartphones to head-mounted display eyewear like "Google Glass", Information and Communication Technology (ICT) is one of the key factors to engineering and technological advancement and the bridge to the future. In view of such significant importance, the government of Malaysia has been embarking on national policies to prioritise the education and the programmes on ICT to train and produce highly skilled ICT workers to achieve the nation's ambition to become a developed country. Despite the government efforts, studies have shown that Malaysia is still currently facing shortage of skilled ICT workers. In view of this shortage of skilled ICT worker problem, a systematic engineering problem solving theory known as TRIZ is applied to generate ideas and potential solutions to solve this problem in this research

    Immune Cell Abundance and T-cell Receptor Landscapes Suggest New Patient Stratification Strategies in Head and Neck Squamous Cell Carcinoma

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    Head and neck squamous cell carcinoma (HNSCC) is a molecularly and spatially heterogeneous disease frequently characterized by impairment of immunosurveillance mechanisms. Despite recent success with immunotherapy treatment, disease progression still occurs quickly after treatment in the majority of cases, suggesting the need to improve patient selection strategies. In the quest for biomarkers that may help inform response to checkpoint blockade, we characterized the tumor microenvironment (TME) of 162 HNSCC primary tumors of diverse etiologic and spatial origin, through gene expression and IHC profiling of relevant immune proteins, T-cell receptor (TCR) repertoire analysis, and whole-exome sequencing. We identified five HNSCC TME categories based on immune/stromal composition: (i) cytotoxic, (ii) plasma cell rich, (iii) dendritic cell rich, (iv) macrophage rich, and (v) immune-excluded. Remarkably, the cytotoxic and plasma cell rich subgroups exhibited a phenotype similar to tertiary lymphoid structures (TLS), which have been previously linked to immunotherapy response. We also found an increased richness of the TCR repertoire in these two subgroups and in never smokers. Mutational patterns evidencing APOBEC activity were enriched in the plasma cell high subgroup. Furthermore, specific signal propagation patterns within the Ras/ERK and PI3K/AKT pathways associated with distinct immune phenotypes. While traditionally CD8/CD3 T-cell infiltration and immune checkpoint expression (e.g., PD-L1) have been used in the patient selection process for checkpoint blockade treatment, we suggest that additional biomarkers, such as TCR productive clonality, smoking history, and TLS index, may have the ability to pull out potential responders to benefit from immunotherapeutic agents. // Significance: Here we present our findings on the genomic and immune landscape of primary disease in a cohort of 162 patients with HNSCC, benefitting from detailed molecular and clinical characterization. By employing whole-exome sequencing and gene expression analysis of relevant immune markers, TCR profiling, and staining of relevant proteins involved in immune response, we highlight how distinct etiologies, cell intrinsic, and environmental factors combine to shape the landscape of HNSCC primary disease

    Indonesian, Malaysia and Thai secondary school students' willingness to communicate in English

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    Purpose – This quantitative study explored willingness to communicate (WTC) across two settings, ESL in Malaysia, and EFL in Indonesia and Thailand. Participants’ WTC levels were measured and communicative situations in which participants were almost always willing and almost never willing to communicate in English were identified.Method – Convenience sampling was used to select the three countries, four secondary schools and 42 intact classes from Years 7 to 10. Two schools were in Malaysia, while one school each was in Indonesia and Thailand. A total of 1038 participants, consisting of 291 Malaysians, 325 Indonesians and 422 Thais took part in the study. The instrument used was an adapted questionnaire measuring WTC inside and outside the English classroom. Findings – The major findings were: 1) Situations in which students were almost never willing to communicate in English were mainly found outside the classroom; 2) Students were almost always willing to communicate in English in brief, predictable situations requiring the use of set phrases; 3) ESL students had a higher level of WTC than EFL students; and 4) WTC inside the classroom was significantly higher than WTC outside the classroom.Significance – The findings have implications for ESL/EFL classroom instruction. English teachers remain the main interlocutors in increasing WTC in the classroom. They also need to bridge the gap between the classroom and the outside world by preparing students for real social situations. This is consistent with the situation-specific aspect of WTC in the heuristic model proposed by MacIntyre, Clément, Dörnyei, & Noels (1998)

    Indonesian, Malaysian and Thai secondary school students’ willingness to communicate in English

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    Purpose – This quantitative study explored willingness to communicate (WTC) across two settings, ESL in Malaysia, and EFL in Indonesia and Thailand. Participants’ WTC levels were measured and communicative situations in which participants were almost always willing and almost never willing to communicate in English were identified.Method – Convenience sampling was used to select the three countries, four secondary schools and 42 intact classes from Years 7 to 10. Two schools were in Malaysia, while one school each was in Indonesia and Thailand. A total of 1038 participants, consisting of 291 Malaysians, 325 Indonesians and 422 Thais took part in the study. The instrument used was an adapted questionnaire measuring WTC inside and outside the English classroom.Findings – The major findings were: 1) Situations in which students were almost never willing to communicate in English were mainly found outside the classroom; 2) Students were almost always willing to communicate in English in brief, predictable situations requiring the use of set phrases; 3) ESL students had a higher level of WTC than EFL students; and 4) WTC inside the classroom was significantly higher than WTC outside the classroom.Significance – The findings have implications for ESL/EFL classroom instruction. English teachers remain the main interlocutors in increasing WTC in the classroom. They also need to bridge the gap between the classroom and the outside world by preparing students for real social situations. This is consistent with the situation-specific aspect of WTC in the heuristic model proposed by MacIntyre, Clément, Dörnyei, & Noels (1998)

    Rapid prioritisation of topics for rapid evaluation: the case of innovations in adult social care and social work.

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    BACKGROUND: Prioritisation processes are widely used in healthcare research and increasingly in social care research. Previous research has recommended using consensus development methods for inclusive research agenda setting. This research has highlighted the need for transparent and systematic methods for priority setting. Yet there has been little research on how to conduct prioritisation processes using rapid methods. This is a particular concern when prioritisation needs to happen rapidly. This paper aims to describe and discuss a process of rapidly identifying and prioritising a shortlist of innovations for rapid evaluation applied in the field of adult social care and social work. METHOD: We adapted the James Lind Alliance approach to priority setting for rapid use. We followed four stages: (1) Identified a long list of innovations, (2) Developed shortlisting criteria, (3) Grouped and sifted innovations, and (4) Prioritised innovations in a multi-stakeholder workshop (n = 23). Project initiation through to completion of the final report took four months. RESULTS: Twenty innovations were included in the final shortlist (out of 158 suggested innovations). The top five innovations for evaluation were identified and findings highlighted key themes which influenced prioritisation. The top five priorities (listed here in alphabetical order) were: Care coordination for dementia in the community, family group conferencing, Greenwich prisons social care, local area coordination and MySense.Ai. Feedback from workshop participants (n = 15) highlighted tensions from using a rapid process (e.g. challenges of reaching consensus in one workshop). CONCLUSION: The method outlined in this manuscript can be used to rapidly prioritise innovations for evaluation in a feasible and robust way. We outline some implications and compromises of rapid prioritisation processes for future users of this approach to consider

    Fluorescent nanoparticles for sensing

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    Nanoparticle-based fluorescent sensors have emerged as a competitive alternative to small molecule sensors, due to their excellent fluorescence-based sensing capabilities. The tailorability of design, architecture, and photophysical properties has attracted the attention of many research groups, resulting in numerous reports related to novel nanosensors applied in sensing a vast variety of biological analytes. Although semiconducting quantum dots have been the best-known representative of fluorescent nanoparticles for a long time, the increasing popularity of new classes of organic nanoparticle-based sensors, such as carbon dots and polymeric nanoparticles, is due to their biocompatibility, ease of synthesis, and biofunctionalization capabilities. For instance, fluorescent gold and silver nanoclusters have emerged as a less cytotoxic replacement for semiconducting quantum dot sensors. This chapter provides an overview of recent developments in nanoparticle-based sensors for chemical and biological sensing and includes a discussion on unique properties of nanoparticles of different composition, along with their basic mechanism of fluorescence, route of synthesis, and their advantages and limitations

    Pediatric Life Support: 2020 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations

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    This 2020 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations (CoSTR) for pediatric life support is based on the most extensive evidence evaluation ever performed by the Pediatric Life Support Task Force. Three types of evidence evaluation were used in this review: systematic reviews, scoping reviews, and evidence updates. Per agreement with the evidence evaluation recommendations of the International Liaison Committee on Resuscitation, only systematic reviews could result in a new or revised treatment recommendation. Systematic reviews performed for this 2020 CoSTR for pediatric life support included the topics of sequencing of airway-breaths-compressions versus compressions-airway-breaths in the delivery of pediatric basic life support, the initial timing and dose intervals for epinephrine administration during resuscitation, and the targets for oxygen and carbon dioxide levels in pediatric patients after return of spontaneous circulation. The most controversial topics included the initial timing and dose intervals of epinephrine administration (new treatment recommendations were made) and the administration of fluid for infants and children with septic shock (this latter topic was evaluated by evidence update). All evidence reviews identified the paucity of pediatric data and the need for more research involving resuscitation of infants and children

    Pediatric Life Support: 2020 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations

    Get PDF
    This 2020 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations (CoSTR) for pediatric life support is based on the most extensive evidence evaluation ever performed by the Pediatric Life Support Task Force. Three types of evidence evaluation were used in this review: systematic reviews, scoping reviews, and evidence updates. Per agreement with the evidence evaluation recommendations of the International Liaison Committee on Resuscitation, only systematic reviews could result in a new or revised treatment recommendation. Systematic reviews performed for this 2020 CoSTR for pediatric life support included the topics of sequencing of airway-breaths-compressions versus compressions-airway-breaths in the delivery of pediatric basic life support, the initial timing and dose intervals for epinephrine administration during resuscitation, and the targets for oxygen and carbon dioxide levels in pediatric patients after return of spontaneous circulation. The most controversial topics included the initial timing and dose intervals of epinephrine administration (new treatment recommendations were made) and the administration of fluid for infants and children with septic shock (this latter topic was evaluated by evidence update). All evidence reviews identified the paucity of pediatric data and the need for more research involving resuscitation of infants and children
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