One of the most important issues related to the management of an Automatic Teller Machine (ATM) network is the correct forecasting of the demand for cash. Typically, this demand, expressed as the value or number of ATM withdrawals, has some regularities that can be used to evaluate future values for these variables. However, forecasting becomes a challenge when a crisis occurs that could affect the behavior of ATM users.
View Article and Find Full Text PDFFinancial contagion refers to the spread of market turmoils, for example from one country or index to another country or another index. It is standardly assessed by modelling the evolution of the correlation matrix, for example of returns, usually after removing univariate dynamics with the GARCH model. However, significant events like crises visible in one financial market are usually reflected in other financial markets/countries simultaneously in several dimensions, i.
View Article and Find Full Text PDFThe paper is part of an investigation of the electrostatic forces contributing to the interaction between colloidal molecules, suspended in the cerebrospinal fluid, with other molecules of the cerebrospinal fluid and with the surrounding environment. The study is based on experimental observations and theoretical considerations. We are reporting about the microscopic observation of particles suspended in the cerebrospinal fluid which was obtained by lumbar puncture of 27 neurosurgery patients.
View Article and Find Full Text PDFNeurol Neurochir Pol
February 2009
Background And Purpose: There are only a few studies in the literature regarding the influence of atmospheric pressure on intracranial homeostasis and the mechanism of the relation has not been clarified. The aim of the study was to evaluate the influence of atmospheric pressure and ambient temperature on parameters of intracranial volume-pressure homeostasis including intracranial pressure and cerebral perfusion pressure as well as on blood pressure and body temperature.
Material And Methods: The authors analyzed the influence of atmospheric pressure on intracranial pressure, blood pressure, cerebral perfusion pressure and body temperature in 14 patients who were monitored because of suspicion of having normal pressure hydrocephalus.