The spurious regression phenomenon in least squares occurs for a wide range of data generating processes, such as driftless unit roots, unit roots with drift, long memory, trend and brokentrend stationarity. Indeed, spurious regressions have played a fundamental role in the building of modern time series econometrics and have revolutionized many of the procedures used in applied macroeconomics....

In the fault diagnosis system using empirical mode decomposition (EMD), it is important to select the intrinsic mode functions (IMFs) which contain as much fault information as possible and to alleviate the problems of mode mixing and spurious modes. An effective solution to these problems in the decomposition process can help to determine significant IMFs and to improve the performance of the ...

Existing research has shown that highly diverse countries tend to provide less public goods. This article argues, by contrast, that the relationship is spurious: both contemporary ethnic heterogeneity and low public goods provision represent legacies of a weakly developed state capacity inherited from the past. Classical theories of state formation are then tested to show that favorable topogra...

Substandard, Spurious, Falsely-Labelled, Falsified and Counterfeit (SSFFC) drugs are an emerging public health concern in India. With one of the huge pharmaceutical sectors in the world, India has a varied prevalence of SSSFC drugs ranging from 0.04% to 34% according to various studies. Apart from severe health consequences, SSSFC drugs also weaken community's trust in the health care system. I...

Systems in which reaction terms are coupled to diffusion and advection transports arise in a wide range of chemical engineering applications, physics, biology and environmental. In these cases, the components of the unknown can denote concentrations or population sizes which represent quantities and they need to remain positive. Classical finite difference schemes may produce numerical drawback...

A 50-year-old woman with recently diagnosed stage IV diffuse large B-cell lymphoma had been started on combination chemotherapy. One month later, she presented with a history of progressive neurological symptoms characterized by left hemiparesis and right facial nerve palsy. A manual cell count on a cerebrospinal fluid (CSF) sample revealed a white cell count of 0.006 109/L. The white cells had...