2,597 research outputs found

    CM Values of Green Functions Associated to Special Cycles on Shimura Varieties with Applications to Siegel 3-Fold X2(2)X_2(2)

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    We generalize the definition of CM cycles beyond the small and big CM ones studied by various authors and give a uniform formula for the CM values of Green functions associated to these special cycles in general using the idea of regularized theta lifts. Finally, as an application to Siegel 3-fold X2(2)X_2(2), we can compute special values of theta functions and Rosenhain λ\lambda-invariants at a CM cycle, which is useful for genus two curve cryptography.Comment: arXiv admin note: text overlap with arXiv:1008.1669 by other author

    The influence of the environmental factors on the adoption of the International Accounting System IAS/IFRS : case of Iraq

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    Purpose: This research aims to study the impact of local environmental factors on the adoption of International Accounting system in Iraq. So the main objective of the research can be the evaluation of the role of local environmental factors in selecting the best method to adopt International Accounting Standards (IAS), and International Financial Reporting Standards (IFRS). Design/methodology/approach: The researchers prepared a questionnaire contains 28 paragraphs which were coded and divided into 7 parts showing the independent variables of the study (the environmental factors) and the dependent variable (the adoption of IAS/IFRS) Findings: The results of the research show that the local environment factors can effect on the choice of the country to adopt the best method of IAS/IFRS adoption, and the statistical analysis results show that there is a very good level of agreement for the participants about the effect of local environment factors on the adoption of IAS/IFRS. Practical implications: The research offers insights to the need to activate national standards and principles that are appropriate to the local environment in order to adapt with the requirements of IAS/IFRS adoption. Originality/value: The research presents significant pragmatic evidence in terms of its meticulous approach towards checking the robustness of results.peer-reviewe

    Collinear and Transverse Momentum Dependent parton densities obtained with a Parton Branching Method

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    We present a solution of the DGLAP evolution equations, written in terms of Sudakov form factors to describe the branching and no-branching probabilities, using a parton branching Monte Carlo method. We demonstrate numerically that this method reproduces the semi-analytical solutions. We show how this method can be used to determine Transverse Momentum Dependent (TMD) parton distribution functions, in addition to the usual integrated parton distributions functions. We discuss numerical effects of the boundary of soft gluon resolution scale parameter on the resulting parton distribution functions. We show that a very good fit of the integrated TMDs to high precision HERA data can be obtained over a large range in x and Q^2

    Using Spec Explorer for Automatic Checking of Constraints in Software ñ‚¬Controlled Systems.

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    In software engineering, several formal models and tools are proposed for defining system requirements and constraints formally. Such formal definitions can help in the automatic checking and verification for them. It can also help in the automatic test case generation, execution and verification. In this paper, we will demonstrate and evaluate the usage of Spec Explorer from Microsoft for defining and checking examples of software controlled system such as cruise control. Such formal requirements can be eventually embedded in the developed system or can help in exposing important elements to test in the testing stage or through the usage of the applicationModel-Based Testing, Spec Explorer, FSM Models, Software Controlled Systems

    Spectrophotometric determination of adrenaline in pharmaceutical preparations

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    AbstractA new and effective spectrophotometric method was developed for the determination of adrenaline in pharmaceutical preparations for control purposes. The condensation of Mannish reaction between 1mol of adrenaline with new ligand, 5-benzimino-1,3,4-thiodiazole-2-thione (I) in the presence of 1mol of p-formaldehyde as the condensing agent with 15–25ml of dioxin as solvent took place. The precipitate yield was yellowish-brown colored. The new ligand was prepared by the Schiff base reaction of 5-amino-3-H, 1,3,4-thiodiazole-2-thione and 1mol of benzaldehyde in 15ml of ethanol as solvent and one drop of glacial acetic acid. The accuracy and precision of this method were determined by analyzed laboratory samples of adrenaline, the results show absolute error ranging from −0.22 to +0.86 and relative errors ranging from ±1.4% to 8.6%. The calibration graph was linear in the range of 2–20mgl−1 for adrenaline with an S.D equal to 2.17%, and RSD of 2.76% (n=5; Conc.=80mgl−1). This method was successfully applied for the adrenaline determination in commercial pharmaceutical injections for the quality control

    Predictors of impending acute chest syndrome in patients with sickle cell anaemia.

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    Acute chest syndrome (ACS) is a major complication of sickle cell anaemia (SCA) and a leading cause for hospital admissions and death. We aimed to study the spectrum of clinical and laboratory features of ACS and to assess the predisposing factors and predictors of severity. A retrospective case-control cohort was studied by retrieving patient information from electronic medical records after ethical approval. One hundred adolescents and adults with SCA and hospital admissions for ACS were identified through the discharge summaries, along with 20 additional patients presenting with VOC, but without ACS (controls). Among the patients with ACS, fever (\u3e38.5 °C), reduced oxygen saturation (\u3c95) and asplenia significantly differed when compared to those of controls (p \u3c 0.05, chi-squared test). The degree of severity was reflected in the use of non-invasive ventilation (NIV), simple and exchange transfusions, and the presence of bilateral pleural effusions and multi-lobar atelectasis/consolidation, which were significantly higher in the cases with ACS than in the controls. Lower haemoglobin (Hb) and high WBC counts were also significantly different between the two groups (p \u3c 0.05, Student’s t test). Using logistic regression, our study further demonstrated that asplenia, fever, and reduced O2 saturation, along with low Hb and leukocytosis, were important predictors for the development of ACS

    Effects of dopamine on ion transport across rat colon

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    Dopamine (5.10-6 – 5.10-4 mol.l-1) when added serosally induced a concentrationdependent decrease in short-circuit current (Isc) across rat distal and proximal colon. This response was preceded by a transient and inconsistent increase in Isc. A part of the catecholamine action is mediated by subepithelial actions sites as it was indicated by the inhibiton of dopamine effects by the cyclooxygenase inhibitor, indomethacin (10-6 mol.l-1), and the neuronal blocker, tetrodotoxin (10-6 mol.l-1). The positive Isc evoked by dopamine was due to chloride secretion as indicated when both Cl- and HCO3- were substituted (using HEPES as buffer) and when of the basolateral membrane was depolarizing by high potassium concentration. The negative Isc evoked by dopamine was due to potassium secretion. This was demonstrated by unidirectional flux experiments. 86Rb+ efflux experiments revealed a redistribution of cellular K+ efflux in favour of the apical K+ conductance in the presence of dopamine. The negative Isc evoked by dopamine was inhibited by the blocker of apical K+ channels, quinine (10-3 mol.l-1), indicating that a stimulation of K+ secretion underlies the measured current. Both the alpha-adrenoceptor blocker phentolamine (10-4 mol.l-1) and as well as inhibitors of D2-like receptors such as L-741,626 (10-5 mol.l-1) and L-745,870 (10-5 mol.l-1) inhibited the dopamine response. All these observations indicate similarities between dopamine and the other catecholamines derivatives in their effect on ions transport in rat colon

    Experimental and Simplified Analytical Investigation of Full Scale Sandwich Panel Walls

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    Concrete sandwich wall panels have been used for decades in the precast concrete construction industry because of their thermal efficiency. To achieve full or partial-composite action in concrete sandwich panel walls, the engineer must obtain a percent composite action from a connector manufacturer, making some engineers uncomfortable. Engineers are dependent upon the recommendations given by the connector manufacturers to establish their designs. This project tested six full scale sandwich panel walls to evaluate the percent composite action of various connectors and compare the results to those provided by the composite connector manufacturers. This project aimed to validate current procedures using these methods, and to develop simpler, more efficient methods for predicting overall strength of this innovative building system. This study concluded that the reported degrees of composite action from each manufacturer are considered conservative in all instances for the connectors tested. Additionally, the intensity and type of connectors are important factors in determining the degree of partial composite action in a panel

    Protecting Children Online: Exploring the Impact of an Online Identifier for Registered Sex Offenders on Adult Internet Users’ Online Information Sharing Behaviors

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    Currently registered sex offenders share in the anonymity afforded by the Internet. With over 500,000 convicted sex offenders on the National Sex Offender Registry, this anonymity is potentially problematic. The potential problem exists in that adult Internet users are unable to identify where their online communications intersect with a registered sex offender. This inability for identification can increase risks to children through the online social networking behaviors of adults. The current study examines how protection of children online could be increased through the impact of an online identifier for registered sex offenders on the online social networking site behaviors of adult Internet users
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