749 research outputs found

    Complexity Measures of Music

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    We present a technique to search for the presence of crucial events in music, based on the analysis of the music volume. Earlier work on this issue was based on the assumption that crucial events correspond to the change of music notes, with the interesting result that the complexity index of the crucial events is mu ~ 2, which is the same inverse power-law index of the dynamics of the brain. The search technique analyzes music volume and confirms the results of the earlier work, thereby contributing to the explanation as to why the brain is sensitive to music, through the phenomenon of complexity matching. Complexity matching has recently been interpreted as the transfer of multifractality from one complex network to another. For this reason we also examine the mulifractality of music, with the observation that the multifractal spectrum of a computer performance is significantly narrower than the multifractal spectrum of a human performance of the same musical score. We conjecture that although crucial events are demonstrably important for information transmission, they alone are not suficient to define musicality, which is more adequately measured by the multifractality spectrum

    Mechanical Characterization of Torsional Micropaddles Using Atomic Force Microscopy

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    The reference cantilever method is shown to act as a direct and simple method for determination of torsional spring constant. It has been applied to the characterization of micropaddle structures similar to those proposed for resonant functionalized chemical sensors and resonant thermal detectors. It is shown that this method can be used as an effective procedure to characterize a key parameter of these devices and would be applicable to characterization of other similar MEMS/NEMS devices such as micromirrors. In this study, two sets of micropaddles are manufactured (beams at centre and offset by 2.5 μm) by using LPCVD silicon nitride as a substrate. The patterning is made by direct milling using focused ion beam. The torsional spring constant is achieved through micromechanical analysis via atomic force microscopy. To obtain the gradient of force curve, the area of the micropaddle is scanned and the behaviour of each pixel is investigated through an automated developed code. The experimental results are in a good agreement with theoretical results

    H2 Formation on the Dust Grain Surface in Divertor Plasma

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    Edge plasma of divertor in tokamak is characterized by different values of plasma parameters (plasmadensity and temperature), plasma composition and overcoming plasma dynamics processes. We survey amodel for theoretical study of the interaction of hydrogen with dust surface and apply our results the H2formation on dust grain surfaces in the divertor. In this model, considering both physisorbed andchemisorbed sites on the grain surface and then adatoms mobility to go from one site to other site bythermal diffusion, describes the formation of H2 on grain surfaces. We find H2 formation rate on the hightemperature dust surfaces in divertor for a range of dust and gas temperatures and densities

    What factors hinder the decision-making process for women with cancer and contemplating fertility preservation treatment?

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    Background: Although fertility preservation (FP) treatment options have increased, the existing evidence suggests that many women with cancer do not feel well supported in making these decisions, but find them stressful and complex and fail to take up fertility care at this crucial time. Whilst existing reviews have all made important contributions to our understanding of the FP decision-making process, none of them examine solely and specifically these processes for women of reproductive age with a diagnosis of any cancer, leaving a gap in the knowledge base. Given the expectation that care is patient-centred, our review aims to address this gap which may be of help to those managing patients struggling to make difficult decisions in the often brief period before potentially sterilising cancer treatment is started. Objective and rationale: Underpinning this narrative review was the question “What factors hinder the decision-making process for women with any cancer and contemplating FP treatment?” Our objectives were to i) assess and summarise this existing literature, ii) identify the factors that hinder this decision-making process, iii) explore to what extent these factors may differ for women choosing different methods of FP, and iv) make recommendations for service delivery and future research. Search methods: A systematic search of the medical and social science literature from the 1st January 2005 up to the end of January 2016 was carried out using three electronic databases (Web of Science (PubMed), Ovid SP Medline and CINAHL via Ebsco). Included in the review were quantitative, qualitative and mixed-method studies. Reference lists of relevant papers were also hand searched. From the 983 papers identified, 46 papers were included. Quality assessment was undertaken using the Mixed Methods Appraisal Tool and thematic analysis was used to analyse the data. Outcomes: From the analysis, six key themes with 15 sub-themes emerged: 1) fertility information provision (lack of information, timing of the information, patient-provider communication); 2) fear concerning the perceived risks associated with pursuing FP (delaying cancer treatment, aggravating a hormone positive cancer, consequences of a future pregnancy); 3) non-referral from oncology (personal situation, having a hormone positive cancer, not a priority, transition between service issues); 4) the dilemma (in survival mode, whether to prioritise one treatment over another); 5) personal situation (parity, relationship status); and 6) costs (financial concerns). Wider implications: This review has found that a wide range of internal and external factors impact the FP decision-making process. Key external issues related to current service delivery such as the provision and timing of FP information, and lack of referral from oncology to the fertility clinic. However, internal issues such as women’s fears concerning the perceived risks associated with pursuing FP also hindered decision-making but these ‘risks’ were typically overestimated and non-evidence based. These findings suggest that the implementation of a range of decision support interventions may be of benefit within the clinical care pathway of FP and cancer. Women would benefit from the provision of more evidence-based FP information, ideally received at cancer diagnosis, in advance of seeing a fertility specialist, for example through the implementation of patient decision aids. Health care professionals in both oncology and fertility services may also benefit from the implementation of training programs and educational tools targeted at improving the communication skills needed to improve collaborative decision-making and deliver care that is patient-centred. Exploration of the current barriers, both intellectual and practical, that prevent some patients from accepting FP will help care providers to do better for their patients in the future. Finally, the extent to which a poor prognosis and moral, ethical and religious beliefs influence the FP decision-making process also warrant further research

    Tactile-like corpuscles in gastric mucosa: a case report

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    BACKGROUND: The presence of tactile corpuscle-like structures in Schwannomas, Neurofibromas and Neuroid Intradermal Melanocytic Nevi is well-documented. We report a case describing the presence of such structures in the lamina propria of grossly normal gastric mucosa. CASE PRESENTATION: A 30 year-old male underwent esophagogastrectomy for carcinoma. Examination of hematoxylin and eosin stained sections reveal tactile corpuscle-like structures in the mucosa adjacent to the main tumor mass. CONCLUSION: This is a rare phenomenon and a literature search revealed only one paper describing such structures in the benign colonic mucosa of a colectomy done for carcinoma. We did not come across any cases in the literature describing such structures in gastrointestinal specimen resected for reasons other than carcinoma. To our knowledge this would be the first case reporting the existence of tactile corpuscles-like structures in gastric mucosa

    INVESTIGATING THE MORTALITY CAUSES OF 1-59 MONTHS BABIES OF VILLAGE FROM 2012 TO 2015, ZAHEDAN, IRAN

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    Since the mortality of 1-59 babies is the most serious challenges facing human society and an important indicator of the health and development of countries, providing solutions to reduce this rate as much as possible is of paramount importance. The main objective of the present study is to examine mortality causes of 1-59 months babies in villages under the protection of Zahedan University of Medical Sciences from 2012 to 2015. The present cross-sectional study was conducted through census. The study included the death of all babies registered in Zahedan villages from 2012 to 2015. Required data was collected using raw information form and Child Health Bureau of the Ministry of Health standard questionnaire; SPSS, version 18, was used to process and analyze collected data. The present study examined the death of an overall number of 1252 Zahedan village babies aged between 1 to 59 months; 752 infants aged less than month and this age group turned out to have highest mortality rate; i.e. 60; the lowest mortality rate, 16.7, happened in the age group of 1 to 4 years. The most common causes of death included perinatal disease (29.8), unintentional injuries (17.5), respiratory system diseases (13.2), infectious and parasitic diseases (6.5), congenital and chromosome diseases (6), and cardiovascular disease (2.5). Since the highest mortality rate, 29.8, is related to perinatal diseases of infants, couples pre-pregnancy care and counselling can play crucial role in decreasing the rate of baby, and specially infants, mortality

    Transport Properties in Ferromagnetic Josephson Junction between Triplet Superconductors

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    Charge and spin Josephson currents in a ballistic superconductor-ferromagnet-superconductor junction with spin-triplet pairing symmetry are studied using the quasiclassical Eilenberger equation. The gap vector of superconductors has an arbitrary relative angle with respect to magnetization of the ferromagnetic layer. We clarify the effects of the thickness of ferromagnetic layer and magnitude of the magnetization on the Josephson charge and spin currents. We find that 0-\pi transition can occur except for the case that the exchange field and d-vector are in nearly perpendicular configuration. We also show how spin current flows due to misorientation between the exchange field and d-vector.Comment: 6 pages, 8 figure
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