Search Results: 1 - 10 of 201837 matches for " Christos P. Panteliadis "
Comment on Childhood Febrile Seizures: Overview and Implications by Tonia Jones and Steven J. Jacobsen
Efterpi Pavlidou, Christos P. Panteliadis
International Journal of Medical Sciences , 2007,
Surgical Treatment for Neonatal Hydrocephalus: Catheter-Based Cerebrospinal Fluid Diversion or Endoscopic Intervention? [PDF]
Matthias Krause, Christos P. Panteliadis, Christian Hagel, Franz W. Hirsch, Ulrich H. Thome, Jürgen Meixensberger, Ulf Nestler
Open Journal of Modern Neurosurgery (OJMN) , 2018, DOI: 10.4236/ojmn.2018.81002
Abstract: Neonatal hydrocephalus can arise from a multitude of disturbances, among them congenital aqueductal stenosis, myelomeningocele or posthemorrhagic complications in preterm infants. Diagnostic work-up comprises transfontanellar ultrasonography, T2 weighted MRI and clinical assessment for rare inherited syndromes. Classification of hydrocephalus and treatment guidelines is based on detailed consensus statements. The recent evidence favors catheter-based cerebrospinal fluid diversion in children below 6 months, but emerging techniques such as neuroendoscopic lavage carry the potential to lower shunt insertion rates. More long-term study results will be needed to allow for individualized, multidisciplinary decision making. This article gives an overview regarding contemporary pathophysiological concepts, the latest consensus statements and most recent technical developments.
Helicobacter pylori infection has no impact on manometric and pH-metric findings in adolescents and young adults with gastroesophageal reflux and antral gastritis: eradication results to no significant clinical improvement
Ioannis Xinias,Theophanis Maris,Antigoni Mavroudi,Christos Panteliadis
Pediatric Reports , 2013, DOI: 10.4081/pr.2013.e3
Abstract: The relationship between Helicobacter pylori (Hp) gastritis and gastroesophageal reflux disease (GERD) remains controversial. The aim was to investigate the association between Hp infection and gastroesophageal reflux (GER) and the impact of Hp eradication on esophageal acid exposure and motility in adolescents and young adults with Hp gastritis and GERD. Sixty-four patients with symptoms suggestive for GERD, of which 40 Hp-positive (group A) and 24 Hp-negative (group B), underwent endoscopy-biopsy, esophageal manometry and 24-hour pH-metry. All group A patients received eradication treatment and were re-evaluated six months later again with 24-hour pH-metry, esophageal manometry, endoscopy-biopsy and clinical assessment. At inclusion, there were no significant differences between the two groups regarding sex, age, grade of endoscopic esophagitis, manometric and pH-metry findings. All Hp-positive patients had an antral predominant gastritis. Eradication of Hp was successful in all patients, and gastritis and esophagitis were healed in all patients. The mean lower esophageal sphincter pressure (LESP) increased significantly from 11.25 mmHg before to 11.71 mmHg after eradication (P<0.05). A significant decrease in reflux index was observed (mean RI 6.02% before versus 4.96% after eradication (P<0.05). However clinical symptoms of GER improved not significantly after 6 months follow up. Conclusively, in children and young adults with GER symptoms and GERD, the presence or absence of Hp has no impact on manometric and pH-metric findings. Eradication of Hp infection results in increase in LESP with a consequent decrease in esophageal acid exposure but not significant clinical improvement.
Neurocognitive evaluation of oxcarbazepine monotherapy in children with benign chilhood epilepsy
Tzitiridou Maria,Panou Dora,Kambas Athanasios,Panteliadis Christos
Annals of General Psychiatry , 2006, DOI: 10.1186/1744-859x-5-s1-s158
Highights in the History of Epilepsy: The Last 200 Years
Emmanouil Magiorkinis,Aristidis Diamantis,Kalliopi Sidiropoulou,Christos Panteliadis
Epilepsy Research and Treatment , 2014, DOI: 10.1155/2014/582039
Abstract: The purpose of this study was to present the evolution of views on epilepsy as a disease and symptom during the 19th and the 20th century. A thorough study of texts, medical books, and reports along with a review of the available literature in PubMed was undertaken. The 19th century is marked by the works of the French medical school and of John Hughlings Jackson who set the research on epilepsy on a solid scientific basis. During the 20th century, the invention of EEG, the advance in neurosurgery, the discovery of antiepileptic drugs, and the delineation of underlying pathophysiological mechanisms, were the most significant advances in the field of research in epilepsy. Among the most prestigious physicians connected with epilepsy one can pinpoint the work of Henry Gastaut, Wilder Penfield, and Herbert Jasper. The most recent advances in the field of epilepsy include the development of advanced imaging techniques, the development of microsurgery, and the research on the connection between genetic factors and epileptic seizures. 1. Introduction The history of epilepsy is intermingled with the history of human existence; the first reports on epilepsy can be traced back to the Assyrian texts, almost 2,000 B.C. [1]. Multiple references to epilepsy can be found in the ancient texts of all civilizations, most importantly in the ancient Greek medical texts of the Hippocratic collection. For example, Hippocrates in his book On Sacred Disease described the first neurosurgery procedure referring that craniotomy should be performed at the opposite side of the brain of the seizures, in order to spare patients from "phlegma" that caused the disease [2]. However, it was not until the 18th and 19th century, when medicine made important advances and research on epilepsy was emancipated from religious superstitions such as the fact that epilepsy was a divine punishment or possession [3, 4]. At the beginning of the 18th century, the view that epilepsy was an idiopathic disease deriving from brain and other inner organs prevailed. One should mention the important work in this field by William Culen (1710–1790) and Samuel A. Tissot whose work set the base of modern epileptology describing accurately various types of epilepsies. 2. Anatomy and Physiology of Epilepsy 2.1. Evolution of Thoughts around the Pathophysiology and Causes of Epilepsy At the beginning of the 19th century, physicians from the French medical school started to publish their research in the field of epileptology; famous French physicians published their works on epilepsy such as Maisonneuve (1745–1826)
On Quantum Risk Modelling [PDF]
Christos E. Kountzakis, Maria P. Koutsouraki
Journal of Mathematical Finance (JMF) , 2016, DOI: 10.4236/jmf.2016.61005
This paper is devoted to the connection between the probability distributions which produce solutions of the one-dimensional, time-independent Schr?dinger Equation and the Risk Measures' Theory. We deduce that the Pareto, the Generalized Pareto Distributions and in general the distributions whose support is a pure subset of the positive real numbers, are adequate for the definition of the so-called Quantum Risk Measures. Thanks both to the finite values of them and the relation of these distributions to the Extreme Value Theory, these new Risk Measures may be useful in cases where a discrimination of types of insurance contracts and the volume of contracts has to be known. In the case of use of the Quantum Theory, the mass of the quantum particle represents either the volume of trading in a financial asset, or the number of insurance contracts of a certain type.
Dynamic Conditional Correlation between Electricity, Energy (Commodity) and Financial Markets during the Financial Crisis in Greece [PDF]
Panagiotis G. Papaioannou, George P. Papaioannou, Akylas Stratigakos, Christos Dikaiakos
Abstract: Liberalization of electricity markets has increasingly created the need for understanding the volatility and correlation structure between electricity, financial and energy commodity markets. This work reveals the existence of structural changes in correlation patterns among these markets and links the changes to both fundamentals and regulatory conditions prevailing in the markets, as well as the current European financial crisis. We apply a Dynamic Conditional Correlation (DCC) GARCH model to a set of market's fundamental variables, related commodity markets and Greece's financial market and microeconomic indexes to study their interaction. Emphasis is given on the period of severe financial crisis of the Country to understand "contagion" and volatility spillover between these markets. This approach enables us to capture the changing co-movement of assets within and between markets (financial, commodity, electricity) as market conditions change. The main results are that there is strong evidence of volatility spillover (or co-volatility) between financial and commodity market, while the Greek electricity market seems to be almost "isolated" from these two markets.
Optimal CUR Matrix Decompositions
Christos Boutsidis,David P. Woodruff
Computer Science , 2014,
Abstract: The CUR decomposition of an $m \times n$ matrix $A$ finds an $m \times c$ matrix $C$ with a subset of $c < n$ columns of $A,$ together with an $r \times n$ matrix $R$ with a subset of $r < m$ rows of $A,$ as well as a $c \times r$ low-rank matrix $U$ such that the matrix $C U R$ approximates the matrix $A,$ that is, $ || A - CUR ||_F^2 \le (1+\epsilon) || A - A_k||_F^2$, where $||.||_F$ denotes the Frobenius norm and $A_k$ is the best $m \times n$ matrix of rank $k$ constructed via the SVD. We present input-sparsity-time and deterministic algorithms for constructing such a CUR decomposition where $c=O(k/\epsilon)$ and $r=O(k/\epsilon)$ and rank$(U) = k$. Up to constant factors, our algorithms are simultaneously optimal in $c, r,$ and rank$(U)$.
Tobacco Networks in the Aegean Islands [PDF]
Christos Bakalis
Advances in Historical Studies (AHS) , 2016, DOI: 10.4236/ahs.2016.52007
Abstract: The Aegean Archipelagos could be seen as a networked cultural space covered by multilevel web frameworks. The lines (flows or trajectories) are routes of people, goods, ideas and the nodes are the islands and their communities. At the same time islands are also fields of production that makes them matrixes of social and cultural creation. This paper deals with the cultivation and marketing of tobacco in the Aegean islands from the second half of the 19th century to the end of the 20th century. The presence of tobacco was combined with the transition to modernity for island communities when the capitalistic economy was spread and became dominant in the eastern Mediterranean. Following the division of labor, the tobacco processing reinforced the dependency of island economies from regional and global financial systems; also the establishment of an industrial working class within island societies. The tobacco left its mark in social and spatial formation in the Aegean islands both in urban and rural environments.
New Information Measures for the Generalized Normal Distribution
Christos P. Kitsos,Thomas L. Toulias
Information , 2010, DOI: 10.3390/info1010013
Abstract: We introduce a three-parameter generalized normal distribution, which belongs to the Kotz type distribution family, to study the generalized entropy type measures of information. For this generalized normal, the Kullback-Leibler information is evaluated, which extends the well known result for the normal distribution, and plays an important role for the introduced generalized information measure. These generalized entropy type measures of information are also evaluated and presented.