132 research outputs found

    Control of polarization and mode mapping of small volume high Q micropillars

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    We show that the polarization of the emission of a single quantum dot embedded within a microcavity pillar of elliptical cross section can be completely controlled and even switched between two orthogonal linear polarizations by changing the coupling of the dot emission with the polarized photonic modes. We also measure the spatial profle of the emission of a series of pillars with different ellipticities and show that the results can be well described by simple theoretical modeling of the modes of an infinite length elliptical cylinder

    Evaluating the Moisture Content Variation on Critical Strain of Geo-materials: A Case Study

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    The tunnel's stability during construction is a very important matter. Some methods have been proposed for stability evaluation, but the hazard warning levels (HWLs) are more applicable among these methods. Despite monitoring and applying HWLs, several collapses in Shibli twin tunnels in Iran have cast doubts on the accuracy of this criterion in the presence of water. In this study, the critical strains under different water contents were measured through uniaxial compressive strength tests on 11 different shale and marl samples. A comparison of laboratory tests and numerical results shows that the influence of the moisture content on the critical strain is negligible. In addition, the results show that there is no direct relationship between the critical strain and uniaxial compression strength

    Production of low fat french-fries with single and multi-layer hydrocolloid coatings

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    Abstract In this study the influence of coating with different hydrocolloids on the oil absorption and quality attributes of French fries was investigated. Our results revealed that hydrocolloid coatings reduced the moisture loss during frying, and hence, reduced the oil uptake of French fries. Among the studied gums as a single layer coating, combination of carboxy methyl cellulose and pectin (0.5 and 1% w/w) lead to the lowest oil uptake of French fries. In samples coated with two and three-layer hydrocolloids, the oil absorption reduced further and the moisture content of final products was higher than the blank samples

    Are people who participate in cultural activities more satisfied with life?

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    The influence of various aspects of life on wellbeing has been extensively researched. However, despite little empirical evidence, participation in leisure activities has been assumed to increase subjective wellbeing. Leisure is important because it is more under personal control than other sources of life satisfaction. This study asked whether people who participate in cultural leisure activities have higher life satisfaction than people who do not, if different types of leisure have the same influence on life satisfaction and if satisfaction is dependent on the frequency of participation or the number of activities undertaken. It used data from UKHLS Survey to establish associations between type, number and frequency of participation in leisure activities and life satisfaction. Results showed an independent and positive association of participation in sport, heritage and active-creative leisure activities and life satisfaction but not for participation in popular entertainment, theatre hobbies and museum/galleries. The association of reading hobbies and sedentary-creative activities and life satisfaction was negative. High life satisfaction was associated with engaging in a number of different activities rather than the frequency of participation in each of them. The results have implications for policy makers and leisure services providers, in particular those associated with heritage recreation. Subjective wellbeing measures, such as life satisfaction, and not economic measures alone should be considered in the evaluation of services. The promotion of leisure activities which are active and promote social interaction should be considered in programmes aimed at improving the quality of life

    Quantum-dots in micro-pillar micro-cavities: experiment and theory

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    ICAR: endoscopic skullā€base surgery

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    International Consensus Statement on Allergy and Rhinology: Allergic Rhinitis

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    Background: Critical examination of the quality and validity of available allergic rhinitis (AR) literature is necessary to improve understanding and to appropriately translate this knowledge to clinical care of the AR patient. To evaluate the existing AR literature, international multidisciplinary experts with an interest in AR have produced the International Consensus statement on Allergy and Rhinology: Allergic Rhinitis (ICAR:AR).Methods: Using previously described methodology, specific topics were developed relating to AR. Each topic was assigned a literature review, evidence-based review (EBR), or evidence-based review with recommendations (EBRR) format as dictated by available evidence and purpose within the ICAR:AR document. Following iterative reviews of each topic, the ICAR:AR document was synthesized and reviewed by all authors for consensus.Results: The ICAR:AR document addresses over 100 individual topics related to AR, including diagnosis, pathophysiology, epidemiology, disease burden, risk factors for the development of AR, allergy testing modalities, treatment, and other conditions/comorbidities associated with AR.Conclusion: This critical review of the AR literature has identified several strengths; providers can be confident that treatment decisions are supported by rigorous studies. However, there are also substantial gaps in the AR literature. These knowledge gaps should be viewed as opportunities for improvement, as often the things that we teach and the medicine that we practice are not based on the best quality evidence. This document aims to highlight the strengths and weaknesses of the AR literature to identify areas for future AR research and improved understanding. </p

    The evaluation of risk for obstructive sleep apnea in patients with type 2 diabetes

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    Cilj istraživanja je procijeniti rizik za opstrukcijsku apneju tijekom spavanja (engl. Obstructive sleep apnea, OSA) u bolesnika sa Å”ećernom boleŔću tipa 2, s pomoću STOP upitnika (engl. Snoring, Tiredness, Observed, Pressure; STOP). S pomoću Epworthove ljestvice pospanosti (ESS) procijenjena je prekomjerna dnevna pospanost i ispitana povezanost pospanosti i rizika za OSA-u u bolesnika sa Å”ećernom boleŔću tipa 2. DosadaÅ”nja istraživanja pokazala su da oÅ”tećena tolerancije glukoze i Å”ećerna bolest tipa 2 predstavljaju čimbenik rizika za OSA-u, ali i da OSA predstavlja čimbenik rizika za Å”ećernu bolest tipa 2. U naÅ”em istraživanju sudjelovala su 252 ispitanika sa Å”ećernom boleŔću tipa 2, koji su bili anketirani za vrijeme redovitih pregleda u Kliničkom bolničkom centru Split. Rezultati naÅ”eg istraživanja pokazali su da je 156 ispitanika (61,9%) imalo povećan rizik za OSA-u prema rezultatima STOP upitnika. Nadalje, ispitanici koji su imali povećani rizik u odnosu na ispitanike koji nisu imali rizik za OSA-u bili su stariji (65 vs. 61 godina, p < 0,05), imali viÅ”i indeks tjelesne mase (28,6 Ā± 5,1 vs. 26,5 Ā± 4,1, p < 0,001), veći opseg vrata (41,5 Ā± 4,7 vs. 39,6 Ā± 6,2, p < 0,009) i bili pospaniji prema rezultatima ESS (5,3 Ā± 3,1 vs. 3,9 Ā± 2,5, p < 0,001). Uz Å”ećernu bolest, većina ispitanika imala je i pridružene bolesti: arterijska hipertenzija (46%), gastroezofagealna refluksna bolest (28%), depresija (10%) i astma (8%). OSA je dio Å”irokoga spektra poremećaja disanja tijekom spavanja koja se dovodi u vezu s metaboličkim poremećajima poput Å”ećerne bolesti tipa 2, a epidemioloÅ”ki podaci o zastupljenosti OSA u Hrvatskoj su nedostatni. Ovo istraživanje ukazuje na potrebu provođenja probira za OSA u bolesnika sa Å”ećernom boleŔću tipa 2, koristeći STOP upitnik.The aim of this study was to evaluate the risk for obstructive sleep apnea (OSA) in patients with type 2 diabetes using the STOP questionnaire (Snoring, Tiredness, Observed, Pressure; STOP). Excessive daytime sleepiness was evaluated with the Epworth sleepiness scale (ESS). Previous studies support the idea that glucose intolerance and type 2 diabetes might represent risk factors for OSA, as well as the idea of OSA being the risk factor for type 2 diabetes. A total of 252 patients with type 2 diabetes were surveyed during the regular follow-up in the Regional Centre for Diabetes, Endocrinology and Metabolic Diseases of Split University Hospital. The results of our study indicate that 156 patients (61.9%) had increased risk for OSA according to STOP questionnaire score. In addition, those at high risk for OSA were older (65 vs. 61 years of age, p < 0.05), had higher body mass index (BMI, 28.6 Ā± 5.1 vs. 26.5 Ā± 4.1, p < 0.001), higher neck circumference (41.5 Ā± 4.7 vs. 39.6 Ā± 6.2, p < 0.009), and had excessive daytime sleepiness according to the ESS score (5.3 Ā± 3.1 vs. 3.9 Ā± 2.5, p < 0.001). Individuals with type 2 diabetes reported to have comorbidities, mainly hypertension (46%), gastroesophageal reflux disease (28%), depression (10%), and asthma (8%). Based on current evidence from literature, OSA could be related to clinical conditions such as diabetes and essential hypertension. More epidemiological data are needed to establish the prevalence of OSA in Croatian patients with type 2 diabetes. Our findings indicate the relevance of STOP questionnaire use as a screening tool for obstructive sleep apnea in patients with type 2 diabetes in Croatia
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