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Search Results: 1 - 10 of 406456 matches for " Samuel M. Alaish "
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An Updated “Historical” Algorithm for Hirschsprung Pa-tients Who Present Late or Severely Ill  [PDF]
Samuel M. Alaish, Eric D. Strauch, Steven Stylianos
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.47A2002
Abstract: Some children with previously undiagnosed Hirschprung’s disease present severely ill at an advanced age with markedly dilated bowel and enterocolitis. In this manuscript, the authors propose the following treatment algorithm: 1) a diverting transverse loop colostomy, 2) a transanal Soave endorectal pull-through, and 3) colostomy closure. The authors report their experience with five patients.
Crisis, Value at Risk and Conditional Extreme Value Theory via the NIG + Jump Model  [PDF]
Samuel Y. M. Ze-To
Journal of Mathematical Finance (JMF) , 2012, DOI: 10.4236/jmf.2012.23025
Abstract: This study develops a new conditional extreme value theory-based model (EVT) combined with the NIG + Jump model to forecast extreme risks. This paper utilizes the NIG + Jump model to asymmetrically feedback the past realization of jump innovation to the future volatility of the return distribution and uses the EVT to model the tail distribution of the NIG + Jump-processed residuals. The model is compared to the GARCH-t model and NIG + Jump model to evaluate its performance in estimating extreme losses in three major market crashes and crises. The results show that the conditional EVT-NIG + Jump model outperforms the GARCH and GARCH-t models in depicting the non-normality and in pro- viding accurate VaR forecasts in the in-sample and out-sample tests. The EVT-NIG + Jump model, which can measure the volatility of extreme price movement in capital markets due to unexpected events, enhances the EVT-based model for measuring the tail risk.
Expected Stock Returns and Option-Implied Rate of Return  [PDF]
Samuel Y. M. Ze-To
Journal of Mathematical Finance (JMF) , 2012, DOI: 10.4236/jmf.2012.24030
Abstract: This paper examines the predictability of implied required rate of return (ROI) of individual stock in the cross-section of stock returns. The required rate of return of each stock is implied using its corresponding stock options and used in estimating the fundamental value of stock. The study finds that stocks with low price to fundamental value have higher future returns. The inferred ROIOI
Musings on the Acropolis: Terminology for biogeography
Samuel M. Scheiner
Frontiers of Biogeography , 2011,
Neoliberalisierung als Gesellschaftskrise. Kommentar zu Margit Mayers Urbane soziale Bewegungen in der neoliberalisierenden Stadt“
Samuel M?ssner
s u b u r b a n : zeitschrift für kritische stadtforschung , 2013,
Abstract: Die Darstellung aktueller neoliberaler Politik, wie sie im Beitrag von Margit Mayer dargelegt wird, trifft zumindest im Bereich der kritischen Stadtgeographie auf Zustimmung und wird dort als eine Art common senseCommon Sense betrachtet. Daher greift der nachfolgende Kommentar die überlegungen zur Neoliberalisierung Margit Mayers auf, um sie auf ein konkretes, empirisches Beispiel anzuwenden, wie etwa auf die Frage nach den Widersprüchen und Logiken nachhaltiger Entwicklung von St dten, die in der Literatur als Kritik am vorherrschenden sustainable urban development“ (vgl. Béal 2012; Krueger/Gibbs 2007) diskutiert werden. Dadurch soll das gro e empirische Potential der von Margit Mayer in ihrem Beitrag ausgeführten Konzeption von Neoliberalisierung herausgestellt und gezeigt werden, dass es bei den beschriebenen Prozessen nicht nur um eine konomisierung von Gesellschaft, sondern vielmehr um eine Krise der Demokratie geht.
Torsion-free Word Hyperbolic Groups are Noncommutatively Slender
Samuel M. Corson
Mathematics , 2015,
Abstract: In this note we prove the claim given in the title. A group G is noncommutatively slender if each map from the fundamental group of the Hawaiian Earring to G factors through projection to a canonical free subgroup. Graham Higman, in his seminal 1952 paper, proved that free groups are noncommutatively slender. Such groups were first defined by K. Eda. Eda has asked which finitely presented groups are noncommutatively slender. This result demonstrates that random finitely presented groups in the few- relator sense of Gromov are noncommutatively slender.
Repair of the Median Microform Cleft Lip Using Z-Plasty  [PDF]
Samuel D. Buonocore, Marc E. Walker, Derek M. Steinbacher
Modern Plastic Surgery (MPS) , 2012, DOI: 10.4236/mps.2012.23011
Abstract: A median cleft lip is a rare central midline deficiency of the upper lip. Multiple surgical techniques are described in the literature to address this defect, though there is little consensus on the preferred surgical technique. We describe an intra-oral approach for repair of the median upper lip cleft using mucosal Z-plasty. This technique provides excellent access to the attenuated orbicularis oris muscle and the frenulum fibrosed to the labial margin. The tethered lip can be mobilized and the notch converted with appropriate mucosal length, lip height, and vermillion fullness. The contour of the free labial border immediately improves, all while avoiding a cutaneous scar. The midline cleft lip notch can be effectively treated by adhering to 3 major principles: 1) excision of the tight, constrictive labial band; 2) achieving midline orbicularis oris muscle approximation; and 3) establishing mucosal lengthening using a Z-plasty.
The Use of Human Amniotic Membrane for Cartilage Repair: A Sheep Study  [PDF]
Samuel K. Tabet, David M. Conner, Davis A. Guebert
Stem Cell Discovery (SCD) , 2015, DOI: 10.4236/scd.2015.54005
Abstract: Studies show that human amniotic cells’ pluripotentency can be influenced to produce chondrocytes and osteocytes through adding demineralized bone (DMB). Objective: This study evaluates the human amniotic membrane (HAM) mixed with DMB to fill defects in sheep models. We hypothesized this membrane would fill these defects with hyaline-like cartilage with chondrocytes populating the matrix. Design: Six adult sheep were used in this study. One hindquarter knee of each sheep was utilized to make two cartilage defects: one on the femoral condyle and one in the trochlear grove. Three control sheep had unfilled defects. Three sheep received HAM/DMB from a placenta to fill the defects. The membrane was folded so the cellular layer faced the defect and the joint while demineralized bone was placed between the layers. The membranes were fixed to the femur and to the trochlear grove. At six months, the sheep were sacrificed for evaluation. Results: Of the controls, defects did not fill with hyaline or fibrocartilage. In HAM/DMB sheep, 50% of the defects retained the membrane, consistent with other animal models. Membrane defects were examined histologically by a validated scoring system. A strong correlation of little statistical difference between the test and the normal cartilages was observed. The defects that retained membranes had evidence of diffuse chondrocyte-like cell proliferation of stromal matrix similar to hyaline cartilage. Conclusions: HAM/DMB is a potential source of pluripotent cells that can influence chondrogenesis in defects in sheep models. The implications for application in a human model are promising and warrant further study.
Radio Wave Propagation Experiment in Sugarcane Fire Environments  [PDF]
Douglas Letsholathebe, Kgakgamatso M. Mphale, Samuel Chimidza, Malcolm L. Heron
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2016, DOI: 10.4236/jemaa.2016.87013
Abstract: Large fires have an effect of suppressing Very or Ultra High Frequency (VHF/UHF) radio wave signals strength which consequently impact negatively on the efficiency of radio communications at the frequency ranges. Mobile hand-held radio operating at the frequency ranges is a major communication tool during fire suppression; therefore inefficient radio communication systems put lives of fire fighters at risk. One of the causes of signal attenuation in fire environment is plume ionization. Plume species which include graphitic carbon, alkalis and thermally excited radicals such as methyl are responsible for ionization. As atmospheric pressure ionized medium (combustion plasma), sugarcane fire has momentum transfer electron-neutral collision frequency much higher than plasma frequency, hence propagation of VHF/UHF radio waves through such a medium is predicted to suffer a significant attenuation and phase shift. Radiowave propagation measurements were carried out in a moderate intensity prescribed sugarcane fire at 151 MHz frequency over a 590 m path using a radiowave interferometer. The radio wave interferometer measured signal attenuation of 0.43 dB through the fire with maximum temperature and flame depth of 1154 K and 8.7 m, respectively.
Fuzzy max-min composition technique in medical diagnosis
A. Edward Samuel,M. Balamurugan
Applied Mathematical Sciences , 2012,
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