Electrical Resistivity

ABSTRACT Thin film resistors, based on the NiCr alloys, have been fabricated and studied at temperatures down to 50 mK. Resistivity of the films varied within (7-11) Ohm*square depending on additions of Cu, Al and Ge. The resistors demonstrate Kondo minimum at 20 K - 30 K. Power dependence measurements at sub Kelvin temperatures showed an electron overheating at the power level above 10 pW for the Ni75Cr20Cu2.5Al2.5 (Evanohm) 500 kOhm film resistor.

Bei der systematischen Auswertung von Luftbildern der Bayerischen Vermessungsverwaltung gelang Harald Krause im Juni 2016 die Entdeckung einer bislang unbekannten Befestigung am östlichen Ortsrand von Aying. Mit seltener Deutlichkeit zeigten sich auf der im Juli 2015 angefertigten Senkrechtaufnahme im Bayerischen Denkmal-Atlas Grabenverläufe und rechteckige Turmstandorte als positives Bewuchsmerkmal im ausreifenden Getreide.
Zur Vervollständigung des Grundrisses und zur weiteren Klärung der Befunderhaltung beschloss das BLfD, eine integrierte geophysikalische
Prospektion durchzuführen. Die mutmaßliche Kastellfläche und deren Umgebung wurden zuerst großflächig mit einem Förstersonden-Magnetometer prospektiert. Ergänzend wurde der Kernbereich des Bauwerks mit dem Cäsium-Totalfeldmagnetometer begangen und zusätzlich der Bereich des nordöstlichen Eckturms mit dem elektrischen
Widerstandsmessgerät RM15 in einer Dipol-Dipol-Anordnung vermessen.

Bangladesh is a country characterized by numerous natural disasters. These natural hazards occur both on the surface (e.g., flooding and river avulsions) and within the subsurface (e.g., earthquakes) (see figure), and both types have been related to regional tectonic activity. Bangladesh is also one of the most highly populated countries in the world with a capital city, Dhaka, host to 15 million people. This urban center is located only 40 km southeast from the Madhupur Tract, a potentially tectonically hazardous region. In order to determine this region’s tectonic hazard potential, recent studies have attempted to detect and identify significant neotectonic signatures of the tract, such as faults, lineaments, and weak zones within the region. Recent earthquake evidence along the proposed Madhupur Fault suggests that the area my be tectonically unstable and vulnerable to further seismicity, placing the fast-growing and densely populated Dhaka city in potential danger (see figure).
The Madhupur Tract is in central Bangladesh, and is surrounded by the Jamuna-Brahmaputra river floodplain. The Madhupur Tract is an exposed Quaternary interfluve between two pathways for the Brahmaputra River. Possible uplift of the Madhupur Tract may have exerted a significant control on the avulsion history of the Jamuna River. The Jamuna river avulsion history is cyclic, with a periodicity of about 1800 years. Within these cycles, the Jamuna’s position has fluctuated between west and east of the Madhupur(Pickering et al., 2013). As this avulsion history is thought to be, at least partly, related to seismicity in the region, future seismicity has the potential to cause future river avulsions and related flooding. It is believed that 1885 Bengal earthquake may have been caused by the rupture of the blind Madhupur fault (see figure) on the western margin of the Madhupur. However, there is no paleoseismological evidence. The principle aim of this research is to identify the location of the Madhupur fault and the connection between fault activity and the avulsion history of the Jamuna River. To this end, we aim to determine, existence of the fault by mapping the local lithology using resistivity, and ultimately shed light of the cause of Jamuna River avulsions.