This study will analyze the variables of economic growth, poverty rate, unemployment and Human Development Index using situational trend analysis 4 factors before - after Covid-19 spatial autocorrelation to see inter-regional linkages as well distribution pattern observed data. The purpose was: 1) find out description situation – Covid-19; 2) knowing based on Moran’s index with weighting matrix...

A new species of Anisogomphus Selys, A. yanagisawai sp. nov. (holotype male and paratype specimens) from N. Thailand (Doi Inthanon, ca. 1,400 m a.s.l., Ban Luang, Chiang Mai Prov.), is described and illustrated. This species can apparently be distinguished from the other species of this genus by the morphology of the anal appendages, especially the straight cerci closely disposed to each other ...

We consider a class of random lattice operators including Sc hr odinger operators of the form H = + w + gv; where w(x) is a real-valued periodic function, g is a positive constant and v(x); x 2 Zd; are independent, identically distributed real random variables. We prov e that if the operator + w has gaps in the spectrum and g is su ciently small, then the operator H develops pure point spectru...