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Pitfalls inherent in retrospective time‐to‐event studies: The example of time to pregnancy
Statistics in Medicine, 1993AbstractRetrospective studies of time from initiation of risk (for example, transfusion of HIV‐infected blood) to the occurrence of an endpoint of interest are useful in epidemiology. One example is studies of time to pregnancy, which have evaluated exposures that may affect human fertility.
C R, Weinberg, D D, Baird, A S, Rowland
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Pitfalls and Their Remedies in Time-Resolved Fluorescence Spectroscopy and Microscopy
Journal of Fluorescence, 2005Time-resolved fluorescence spectroscopy and microscopy in both time and frequency domains provide very useful and accurate information on dynamic processes. Good quality data are essential in obtaining reliable parameter estimates. Distortions of the fluorescence response due to artifacts may have disastrous consequences.
Martin, vandeVen +3 more
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Pitfalls of Short Time Horizon
2017In the next chapters system models are presented of the way we usually shoot ourselves in the foot. They are called archetypes because they always come back in some form. However practical it is to know these archetypical dynamics, we have to be extremely careful: our minds have the tendency to see a pattern even in completely random data.
Jaap Schaveling, Bill Bryan
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Promises and pitfalls of time and efficiency in pharmacy education
2023Neoliberalism in higher education is geared towards preparing students for productivity and the workplace. Pharmacy education may be more affected due to the profession’s business origins and a clear path from education to pharmacy practice. Critical theorists have deemed neoliberalism problematic in education because it reinforces and perpetuates ...
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Mechanical Time-Sorting of Pitfall Captures
The Journal of Animal Ecology, 1958(With 1 Figure in the Text) During an investigation of the diurnal activity of the fauna of the floor in two contrasted habitats, preliminary estimates were made by counting, at regular intervals throughout the day, the number of animals seen to move in small quadrats. The limitations of this method soon became obvious. The weather was found to exert a
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Pitfalls of Fitting Autoregressive Models for Heavy-Tailed Time Series
Extremes, 1999This paper deals with the problem of application of autoregression models \(AR(p)\) to the analysis of heavy-tailed time series data. It focuses on two methods of parameter estimation: Yule-Walker (YW) and linear programming (LP). A brief overview of the methods of AR model selection and tests of AR model adequacy is presented.
Feigin, Paul D., Resnick, Sidney I.
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Two Pitfalls in Comparing Financial Time-Series
SSRN Electronic Journal, 2013This note outlines two pitfalls in visually comparing financial time-series such as stock prices or the values of financial portfolios. One occurs when we aim to compare growth rates (or returns), the other when we compare risk in the sense of price variability.
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First-Time Book Publishing: Negotiating the Perils and Pitfalls
Technical Services Quarterly, 2007ABSTRACT The four librarians who created Newbery and Caldecott Awards: A Subject Index published by Linworth, 2003, share the problems and lessons learned while producing their first reference book. Topics include selecting research partners, dividing the responsibilities, and dealing with the decisions of producing the book. The article also discusses
Denise Goetting +3 more
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Pitfalls in Seismic Time to Depth Conversion for Geological Modelling
EAGE Research Workshop - From Seismic Interpretation to Stratigraphic and Basin Modelling, Present and Future, 2006The objective of geological modelling is to build a realistic image of the subsurface by representing both the structural features and the lithological properties of the units. Geological model building is the basic step of basin and reservoir modelling studies. In this frame, the main input information are usually derived from seismic interpretation :
A. Jardin +3 more
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Pitfalls and Safeguards in Real-Time Digital Systems with Emphasis on Programming
IRE Transactions on Engineering Management, 1961Real-time digital systems are largely a technical innovation of the past decade, but they appear destined to become more wide spread in the future. They monitor or control a real physical environment, such as an air-traffic situation, as distinguished from simulating that environment on an arbitrary time scale.
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