A closed core microfluxgate sensor with cascaded planar FeNi rings

In this paper, we present a new microfabricated fluxgate sensor structure using cascaded planar rings as the ferromagnetic core. The planar ring structures provide closed magnetic excitation loops enabling uniform core saturation with relatively small excitation magnetic field. The magnetic excitation is provided with a rod passing through the ring cores. Planar coils placed under the edges of the core are used as sensing elements. By using this structure, fluxgate sensors having a closed core configuration are realized with a developed microfabrication process in a very small area (<0.1 mm(2)) with reduced number of via connections. The ferromagnetic rings are realized with a standard FeNi (iron nickel) electroplating process. The main advantage of this structure is the possibility to arrange the linear operation range of the sensor by only changing the number of ring cores, without affecting the excitation mechanism. This is demonstrated by simulations and microfabricated prototypes having 18 and 12 ring cores with +/- 300 mu T and +/- 550 mu T linear operation ranges, respectively. A maximum linear operation range of +/- 2 mT is achieved with a larger size, 4-ring core. This is the widest linear operation range achieved with the microfabricated fluxgate type sensors, without using a feedback loop, to the best of our knowledge. (C) 2010 Elsevier B.V. All rights reserved

Micro fluxgate sensor with cascaded planar ring cores

In this paper, we present a new microfabricated fluxgate sensor structure having cascaded planar rings as the ferromagnetic core. A circular magnetic excitation is provided with a rod passing through the FeNi rings as a sewing thread. Planar coils placed under the edges of the core are used as sensing elements. The sensing coils and the excitation rod are made of AlSi, and the planar FeNi ferromagnetic core is electroplated in between the excitation rod metallization. The sensor with 18 cascaded cores has 623 mu V/mT sensitivity and +/- 300 mu T linear operation range for a sinusoidal current excitation at 1 MHz with 170 mA peak

Behavioral economics through the lens of persuasion context analysis:a review of contributions in leading information systems journals

Abstract As technology becomes an integral part of our everyday lives, the more crucial it is to investigate how it can be further harnessed to improve individuals’ wellbeing. This involves studying users’ interactions with technology, how different design techniques influence their use, and the factors that might lead to sub-optimal use of technology. Such factors include decision biases which are mostly investigated in behavioral economics research. Behavioral economics counters the arguments of standard economic theories and combines psychological theories and economics to study how people actually behave as opposed to how they should behave as rational beings. Thus, this review provides an overview of behavioral economics research in the major IS journals. The aim is to determine the extent of such research within the IS field. An electronic search of the major IS journals was conducted over an 8-year period and the findings were categorized according to the use, user and technology contexts of the persuasive systems design model. The findings reveal the need for awareness of how various behavioral economic principles (or decision biases) influence decision making in technology-mediated settings and the development of strategies to mitigate their influence