6957792 research outputs found
Sort by
Patterning light emitting porous silicon using helium beam irradiation
Get PDFABSTRACT High energy helium beam has been utilized to pattern silicon prior to electrochemical etching in hydrofluoric acid. Photoluminescence (PL) studies carried out on medium resistivity silicon showed that the PL wavelength of the irradiated regions is continuously red-shifted by up to 150 nm with increasing dose. On the lower resistivity silicon, the intensity is shown to increase by more than twenty times with dose. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) have been used to determine the surface morphology of the irradiated structure. This technique is potentially important for producing an integrated silicon based optoelectronic device
Clinical Study Peritoneal Dialysis in Dengue Shock Syndrome May Be Detrimental
Get PDFDengue shock syndrome is the most severe form of Dengue that can be fatal. Nonresponders to standard therapy need intensive care. This paper outlines the clinical features, complications, and outcomes of Dengue Shock Syndrome not responding to standard therapies and needing supportive care in a tertiary referral intensive care unit of a developing country. Nearly one-third die within 3 days of admission to ICU. Peritoneal dialysis predicts the worst outcomes
A Generalised Fuzzy Soft Set Based Student Ranking System
Get PDFAbstract In this paper a new technique based on generalised fuzzy soft set has been introduced for the determination of class ranking of students. Some problems in student ranking has been solved which could not be solved using earlier available standard techniques
الثالث- العدد التاسع- المجلد الطبية- بابل مجلة Acetylcholinesterase Activity, Calcium, Magnesium, and Total Antioxidant in Uncontrolled Diabetic Type 2 Patients Treated with Daonil ® and Glucophage ® Maha F. AL-Smaism الثالث- العدد التا
No full textAbstract In this study 298 patients suffering from diabetes mellitus type 2 (150 male, and 148 female) aged between 35 to 67 years with a mean age of (45.11±12.03) were included. The study was carried out from first of November 2009 to the day 31 of May 2010.The samples were obtained from AlKassim hospital and Merjan Teaching Hospital in Hilla city . The study included three groups: Firstly: 149 patients with type 2 diabetes mellitus treatment with Daonil . Secondly: 149 patients with type 2 diabetes mellitus treatment with Glucophage .Thirdly: 83 apparently healthy subjects were chosen as healthy people. The results show a significant increase p<0.05 in Acetylcholinesterase AChE activity of patients treated with daonil and glocophage ≤5 years when compared with control group , while AChE activity found to be highly significant increase p<0.001 in patients treated more than five years when compared with ≤5 years and control groups. No differences were found in blood AChE activities between subgroups of each sample used in this study . Corrected total calcium and ionized concentrations in DM type 2 treated with daonil and glucophage groups ≤5 and more than five years found to were highly significantly increased p<0.001,when compared with that of the control, while there was a non-significant difference p>0.05 between the males and females when compared in the same group( control, daonil and glucophage ) in all duration. A significantly increased p<0.001 in the corrected total calcium concentration of DM patients treatment with daonil (more than five years) when compared with that of the patients treatment with glucophage . A significant increase p<0.05 in magnesium concentrations in diabetes mellitus patients (daonil, and glucophage) ≤5 years when compared to control group. On the other hand a highly significant increase p<0.001 of magnesium concentrations were found in sera of DM patients more than five years when compared to DM patients ≤5 years and control group .No significant difference were found between males and females in control group and patients groups. A significant decreased p<0.05 in total antioxidant(TAC) concentration in DM patients treatment ≤5 years with daonil and glucophage was found when compared with control groups .A highly significant increase of total antioxidant p<0.001 in sera of TCA of DM type 2 patients treated (6-15y) when compared with that of healthy control group and ≤5 years. No significant difference was found in the males and females of DM type 2 patients treated with daonil and glucophage (≤5y or 6-15 y) when compared with control group P>0.05. الخالصة
The Impact of Gentrification on Ethnic Neighbourhoods in Toronto: A Case Study of Little Portugal
Get PDFAbstract Despite extensive literature on the nature and impact of gentrification, there has been little consideration of the effects of gentrification on ethnic neighbourhoods. This study evaluates the negative and positive effects of gentrification on the Portuguese in west central Toronto. Details concerning the settlement patterns of the Portuguese, the characteristics of Portuguese residents and patterns of gentrification in inner-city Toronto were obtained from census data. Evaluations of neighbourhood change and attitudes of the residents towards gentrification were obtained from key informant and focus group interviews. The results suggest considerable ambivalence among the respondents, but most agreed that the long-term viability of Little Portugal as an immigrant reception area with a good supply of low-cost housing is in doubt
A framework for assessing the lifecycle greenhouse gas benefits of forest bioenergy and biofuel in an era of forest carbon management
No full textABSTRACT. The use of forest wastes for the production of bioenergy and liquid biofuels has potential to offset the use of fossil energy sources. Some studies suggest biofuel and bioenergy produced from the removal of forest waste − products considered to be uneconomical to harvest − generates significant wellto-tank greenhouse gas (GHG) emission savings by displacing energy produced from fossil resources. In parallel, an increase in the frequency and intensity of wildfire both empirically observed and predicted by climate change models has highlighted the need to actively manage forests to increase the resilience of forests to wildfire. Integrated analysis that takes into account the dynamic interactions between carbon (C) pools resulting from forest management practices, forest fire behavior, and the fate of forest biomass in debris, forest products, and energy production will provide a consistent framework for policy planning that maximize the overall benefits of GHG policy. This integrated approach will have a better chance of balancing the tradeoffs and maximizing synergies between C management and sustainability goals. This paper outlines a lifecycle accounting framework for evaluating the GHG benefits of utilizing forest biomass for bioenergy production under various forest management strategies
No full textAhstrmL Self-avoiding walks with a curvaturedependent energy are studied with renormalization group methods on some fractal lattices. Fixed p i n l s mnrspnding UI universal and non-universal behaviours are generally present. However initial mnditions of the renomalization group mumions cm pment non-universality. When univemlity holds the persistence length k found V, diverge much Easter than in the periodic lattice as the cuwature energy increases
"It's Us Against the World": How Distrust in Americans versus People-In-General Shapes Competitive Foreign Policy Preferences
No full textPrevious research has uncovered links between generalized distrust and preferences for competitive (vs. cooperative
Joint Viterbi Decoding and Decision Feedback Equalization for Monobit Digital Receivers
No full textAbstract-In ultra-wideband (UWB) communication systems with impulse radio (IR) modulation, the bandwidth is usually 1GHz or more. To process the received signal digitally, high sampling rate analog-digital-converters (ADC) are required. Due to the high complexity and large power consumption, employing multibit high-rate ADC is impractical. However, monobit ADC is appropriate. The optimal monobit digital receiver has already been proposed. This kind of receiver has been derived under the assumption that the intersymbol interference (ISI) either does not exist or can be regarded as random noises. When encountered with heavy ISI, these receivers are not excellent as we expected. There are many approaches to solve the ISI problem in regular communication systems. When applied to monobit systems, unfortunately, most of them turned out to be unavailable due to the great loss of quantification. Decision feedback equalization (DFE) is an effect way to deal with ISI in monobit digital systems. In this paper, we propose an algorithm that combines Viterbi decoding and DFE together for monobit receivers. In this way, we suppress the impact of ISI effectively, thus improving the bit error rate (BER) performance. In addition, we introduce a method called state expansion by which better BER performance can be achieved. Under the condition of perfect channel state information(PCSI), the simulation results show that the algorithm has about 1dB SNR gain compared to separate monobit BPSK demodulation with convolutional decoding and 1dB SNR loss compared to the BER performance of optimal monobit receiver in the channel without ISI. Compared to the full resolution detection in fading channel without ISI, it has 3dB SNR loss after state expansion. Under the CSI that achieved from iterative evaluation, both the performance of optimal monobit receiver and joint receiver have 1dB loss compared to that of PCSI
EFFECT AMBIENT OXIDATION ON STRUCTURAL AND OPTICAL PROPERTIES OF COPPER OXIDE THIN FILMS
No full textAbstract: The structural, optical properties of copper oxide thin films ( CuO) thin films which have been prepared by thermal oxidation with exist air once and oxygen another have been studied. Structural analysis results of Cu thin films demonstrate that the single phase of Cu with high a crystalline structure with a preferred orientation (111). X-ray diffraction results confirm the formation of pure (CuO) phase in both methods of preparation. The optical constant are investigated and calculated such as absorption coefficient, refractive index, extinction coefficient and the dielectric constants for the wavelengths in the range (300-1100) nm