An IR investigation of natural and synthetic amesites has been made. The naiural amesite from Chester, Massachusetts, and certain synthetic samples show order in the Al for Si substitution in tetrahedral sheets. Their IR spectra are characterized by sharp absorption bands and vibrations of "isolated" Al tetrahedra. In contrast, the broadening in the absorption bands and the presence of two abso...

Gambang Kromong sebagai sebuah musik yang berkembang dalam masyarakat Betawi mempunyai tiga kategori lagu, yaitu lagu dalem, sayur, dan modern. Lagu dalem merupakan klasik kondisinya terancam punah karena tidak lagi diapresiasi dengan baik oleh pendukungnya. Hal tersebut menyebabkan ini terlupakan begitu saja. Salah satu punya kemungkinan untuk digali kembali adalah “Pobin Poa Si Li Tan”. Yampo...

Nowadays acoustic emission (AE) testing based on the Kaiser Effect (KE) is increasingly used to estimate the in-situ stress in laboratories. In this work, this effect is assessed on cylindrical specimens in numerical simulations of the cyclic loadings including loading, unloading, and re-loading cycles using a 3D code called the particle flow code (PFC) based upon the distinct element method. T...

In this second paper, we develop transferable semiempirical extended Hückel theoretical EHT parameters for the electronic structure of another technologically important material, namely, silicon. The EHT parameters are optimized to experimental target values of the band dispersion of bulk silicon. We quantitatively benchmark our parameters to bulk electronic properties such as band edge energie...

The atomic-layer (AL) doping technique in epitaxy has attracted attention as a low-resistive ultrathin semiconductor film as well as a two-dimensional (2-D) carrier transport system. In this paper, we report carrier properties for B AL-doped Si films with suppressed thermal diffusion. B AL-doped Si films were formed on Si(100) by B AL formation followed by Si cap layer deposition in low-energy ...

amygdaloidal, cavity- and fracture-filling zeolites in eocene volcanic rocks from the kuh-e-aradeh of southern kahrizak, in the northernmost part of central iran have been studied in some detail by optical, chemical analysis, sem, and xrd techniques. the zeolites identified, in order of their relative time of formation from early to late, are tetranatrolite, analcime, natrolite, mesolite, stilb...