This study is the first part of a comprehensive paleoseismic study in the Nojima Fault Zone (NFZ), the seismogenic fault of the 1995 Mw 6.9 Kobe (Japan) earthquake, which explores the use of the luminescence dating method for understanding past faulting time and assessing the activity of faults developed in basement rocks. Our approach is focused on methodological aspects of the optically stimulated luminescence (OSL) technique and reports on a series of ages of fault gouge samples. Our analysis revealed that (1) quartz OSL signals have been reset (at least partially) during past seismic faulting events, (2) fault gouge layers bounded by sharp fault planes are younger than gouge layers far from the main fault planes, and (3) the most recent seismic faulting, affecting the different gouge layers on the Nojima fault took place from 62.8 ± 4.3 ka to 18.5 ± 1.3 ka, while on the Asano fault from 139.3 ± 8.9 ka to 45.8 ± 3 ka, with these ages representing maximum possible ages. In this regard, this is the first successful absolute dating attempt on the NFZ using quartz grains and the only luminescence study, as yet known, producing a series of ages representing neotectonic activity of the Nojima and Asano faults during the late Pleistocene and middle to late Pleistocene, respectively. The present work has indicated that OSL is potentially a promising technique for dating fault gouges and assessing the activity of faults, although more work is needed for further refinement.

La recherche sur la Grèce ancienne s’est peu préoccupée de l’artisanat du fer et de ses procédés de production. Même si plusieurs études pionnières ont été réalisées, aussi bien sur les textes que sur des données archéologiques limitées, tout reste pratiquement à faire. Si les objets en fer apparaissent dans l’Égée dès le II e  millénaire, les débuts de la métallurgie du fer posent de nombreuses questions, tant pour leur date que pour les conditions matérielles et culturelles de son évolution. De nombreuses régions de Grèce sont riches en matières premières mais les vestiges archéométallurgiques montrent pour l’instant deux grandes zones pionnières : d’une part le nord de l’Égée, surtout Thasos, et, d’autre part, le Péloponnèse (Laconie, Argolide etc.). Le rôle majeur du fer laconien semble confirmé par l’archéométallurgie, tandis que la question des échanges de matières premières reste cruciale. Nous espérons qu’un premier tableau, à partir des éléments connus par les travaux en cours, pourra stimuler le développement de nouvelles recherches.

Stabilities, instabilities and turbulences have always appeared into a cylindrical magnetized argon plasma. These phenomena are caused by linear or nonlinear dynamics and are interpreted with the linear or nonlinear theory accordingly. In this paper, an experimental study accompanied by theoretical justification and based on the wave-wave interaction has been made; an azimuthally moved driving wave is enforced in a very simple way. The turbulence stabilization, the wave coupling, the instability synchronization and other wavy interactions, which are caused by using an external spatiotemporal electric signal, are presented. The research of the wavy subjects continuing in our laboratory aspires to comprehend the plasma chaotic behavior and take a step into suppressing the unstable inclination.

Many experimental data along with their theoretical interpretations on the rf low-temperature cylindrical plasma have been issued until today. Our Laboratory has contributed to that research by publishing results and interpretative mathematical models. With the present paper, two issues are being examined; firstly, the estimation of electron drift caused by the rf field gradient, which is the initial reason for the plasma behaviour, and secondly, many new experimental results, especially the electron-neutral collision frequency effect on the other plasma parameters and quantities. Up till now, only the plasma steady state was taken into consideration when a theoretical elaboration was carried out, regardless of the cause and the effect. This indicates the plasma's complicated and chaotic configuration and the need to simplify the problem. In the present work, a classification about the causality of the phenomena is attempted; the rf field gradient electron drift is proved to be the initial cause.