Som amen i synagogen

Dyadic data analysis with amen

Dyadic data on pairs of objects, such as relational or social network data, often exhibit strong statistical dependencies. Certain types of second-order dependencies, such as degree heterogeneity and reciprocity, can be well-represented with additive random effects models. Higher-order dependencies, such as transitivity and stochastic equivalence, can often be represented with multiplicative ef...

Acronyms Must always bE defiNed (AMEN).

To the Editor: In a recent article from a prominent cardiological journal, the authors compared major adverse cardiac event rates between primary coronary angioplasty and thrombolytic therapy. They reported their results for the PCAT collaboration, but never explained what the acronym PCAT stood for. That surprised and disappointed me, because according to the International Committee of Medical...

Som Input

3D SOM Neighborhood Algorithm

Neighborhood algorithm is an important part of 3D SOM algorithm. We proposed three kinds of neighborhood shape and two kinds of neighborhood decay function for threedimensional self-organizing feature maps (3D SOM) algorithm and applied them to three-dimensional image compression coding. Experimental results show that the 3D orthogonal cross neighborhood shape and exponential function algorithm...

SOM in data mining