Non-interlacing peakon solutions of the Geng-Xue equation

The aim of the present paper is to derive explicit formulas for arbitrary peakon solutions of the Geng-Xue equation, a two-component generalization of Novikov's cubically nonlinear Camassa-Holm type equation. By performing limiting procedures on the previosly known formulas for so-called interlacing peakon solutions, where the peakons in the two component occur alternatingly, we turn some of the peakons into zero-amplitude "ghostpeakons", in such a way that the remaining ordinary peakons occur in any desired configuration. We also study the large-time asymptotics of these solutions.Comment: 133 pages, 25 figures. pdfLaTeX + AMS packages + hyperref + Tik

Urban Development Transitions and their Implications for Poverty Reduction and Policy Planning in Uganda

Urbanization is one of the critical global trends shaping the future of humanity. At the same time, it has been argued that full development requires an urbanized environment. This paper attempts to examine and characterize the major phases of urbanizatiotransitions, urbanization, planning, poverty, Uganda

Effect of hyperthermia on prognosis after acute ischemic stroke

<p><b>Background and Purpose:</b> Experimental studies have shown that hyperthermia is a determinant of poor outcome after ischemic stroke. Clinical studies evaluating the effect of temperature on poststroke outcome have, however, been limited by small sample sizes. We sought to evaluate the effect of temperature and timing of hyperthermia on outcome after ischemic stroke.</p> <p><b>Methods:</b> Data of 5305 patients in acute stroke trials from the Virtual International Stroke Trials Archive (VISTA) data set were analyzed. Data for temperatures at baseline, eighth, 24th, 48th, and 72nd hours, and seventh day were assessed in relation to outcome (poor versus good) based on the modified Rankin Scale at 3 months. Hyperthermia was defined as temperature >37.2°C and poor outcome as 90-day modified Rankin Scale >2. Hazard ratios with 95% CIs were reported for hyperthermia in relation to the outcome. Logistic regression models, in relation to hyperthermia, were fitted for a set of preselected covariates at different time points to identify predictors/determinants of hyperthermia.</p> <p><b>Results:</b> The average age of patients was 68.0±11.9 years, 2380 (44.9%) were females, and 42.3% (2233) received thrombolysis using recombinant tissue plasminogen activator. After adjustment, hyperthermia was a statistically significant predictor of poor outcome. The hazard ratios (95% CI) for poor outcome in relation to hyperthermia at different time points were: baseline 1.2 (1.0 to 1.4), eighth hour 1.7 (1.2 to 2.2), 24th hour 1.5 (1.2 to 1.9), 48th hour 2.0 (1.5 to 2.6), 72nd hour 2.2 (1.7 to 2.9), and seventh day 2.7 (2.0 to 3.8). Gender, stroke severity (National Institutes of Health Stroke Scale score >16), white blood cell count, and antibiotic use were significantly associated with hyperthermia (P≤0.01).</p> <p><b>Conclusions:</b> Hyperthermia, in acute ischemic stroke, is associated with a poor clinical outcome. The later the hyperthermia occurs within the first week, the worse the prognosis. Severity of stroke and inflammation are important determinants of hyperthermia after ischemic stroke. In patients with acute ischemic stroke, aggressive measures to prevent and treat hyperthermia could improve the clinical outcomes.</p&gt

Optimization of multi-gigabit transceivers for high speed data communication links in HEP Experiments

The scheme of the data acquisition (DAQ) architecture in High Energy Physics (HEP) experiments consist of data transport from the front-end electronics (FEE) of the online detectors to the readout units (RU), which perform online processing of the data, and then to the data storage for offline analysis. With major upgrades of the Large Hadron Collider (LHC) experiments at CERN, the data transmission rates in the DAQ systems are expected to reach a few TB/sec within the next few years. These high rates are normally associated with the increase in the high-frequency losses, which lead to distortion in the detected signal and degradation of signal integrity. To address this, we have developed an optimization technique of the multi-gigabit transceiver (MGT) and implemented it on the state-of-the-art 20nm Arria-10 FPGA manufactured by Intel Inc. The setup has been validated for three available high-speed data transmission protocols, namely, GBT, TTC-PON and 10 Gbps Ethernet. The improvement in the signal integrity is gauged by two metrics, the Bit Error Rate (BER) and the Eye Diagram. It is observed that the technique improves the signal integrity and reduces BER. The test results and the improvements in the metrics of signal integrity for different link speeds are presented and discussed

Ratiometric techniques to determine fluid viscosity using molecular rotors

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on May 12, 2009)Includes bibliographical references.Thesis (M.S.) University of Missouri-Columbia 2007.Dissertations, Academic -- University of Missouri--Columbia -- Biological engineering.Molecular rotors exhibit viscosity-dependent quantum yield, potentially allowing measurements of fluid viscosity in non-mechanical manner. Several diseases are accompanied by blood plasma viscosity changes; therefore, a diagnostic tool is desirable to measure blood plasma and other biofluids viscosities. When measuring fluorescence emission intensity, the optical properties of the biofluids (absorption and scattering) and the dye concentration influence the measured intensity. We designed a ratiometric fluorophotometer capable of determining fluorescence emission intensity concurrently with biofluid absorption at the dye's excitation and scattering. Validation of the prototype showed excellent correlation of measured values with commercial fluorophotometer (R2=0.99) and spectrometer (R2=0.98). We determined the emission of scattering model solution containing microspheres and the molecular rotor 9-(2-Cyano-2-hydroxy carbonyl) vinyl julolidine (CCVJ) at known viscosities. The information gathered by the instrument can eliminate the influence of turbidity and yield corrected fluorescence emission intensity. On account of correcting the emission measurement for fluid optical properties, a main drawback of commercial fluorophotometers can be overcome. The instrument is characterized by inexpensive design, emission based on light emitted diodes, its speed, and its increased measurement precision