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The spectral estimation method based on the average of short, tapered periodograms is re-examined. The bias of such estimators is typically O(1/b/sup 2/), where b is the length of the short blocks. Much of the current research on multitapering has been focusing on reducing the proportionality constant implicit in the term O(1/b/sup 2/). In this letter, we(More)
We show that there exists a causal 2-D linear process in the nonsymmetric half-plane having the same autocorrelations as a noncausal 2-D linear process in the whole-plane; this property is called the autocorrelation equivalence relation, and can be used for practical fitting and modeling of 2-D processes. Some causal 2-D autoregressive (AR) models with(More)
The purpose of this study is to advance the theoretical knowledge of internationalisation of small and medium-sized firms from an individual perspective. In particular, the research takes a cognitive approach in understanding how experiential knowledge shapes entrepreneurs' uncertainty perception and thus their willingness to recognise and act upon export(More)
The way people consume music in our days has totally changed as a result of the current developments in hardware and software, as well as the evolution of the Internet. People do not buy CDs or records anymore. Nowadays, people store music data on their disks and listen to music via portable devices (i-pods, mobile phones etc.). However, the advent of Web(More)
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