A circuit modeling technique for the ISO 7637-3 capacitive coupling clamp test

In this paper, we propose a transmission-line modeling technique for the ISO 7637-3 capacitive coupling clamp (CCC) test. Besides modeling the test bench, special attention is devoted to the CCC itself, for which an equivalent circuit is constructed based on the concept of surface transfer impedance and surface transfer admittance. The overall model is validated by means of measurements using a nonlinear circuit as device-under-test, as such demonstrating the appositeness to mimick the CCC test in simulations during the design phase

Novel modeling strategy for a BCI set-up applied in an automotive application: an industrial way to use EM simulation tools to help Hardware and ASIC designers to improve their designs for immunity tests

Electronics suppliers of automotive industry use BCI (Bulk Current Injection) measurements to qualify immunity robustness of their equipment whereas electronics components manufacturers use DPI (Direct Power Injection) to qualify immunity of their component. Due to harness resonances, levels obtained during a BCI test exceed standard DPI requirements imposed by automotive suppliers onto components' manufacturers. We propose to use BCI set-up modeling to calculate the equivalent DPI level obtained at the component level during equipment testing and to compare results with DPI measurements realized at IC level

Harmonic balance surrogate-based immunity modeling of a nonlinear analog circuit

A novel harmonic balance surrogate-based technique to create fast and accurate behavioral models predicting, in the early design stage, the performance of nonlinear analog devices during immunity tests is presented. The obtained immunity model hides the real netlist, reduces the simulation time, and avoids expensive and time-consuming measurements after tape-out, while still providing high accuracy. The model can easily be integrated into a circuit simulator together with additional subcircuits, e.g., board and package models, as such allowing to efficiently reproduce complete immunity test setups during the early design stage and without disclosing any intellectual property. The novel method is validated by means of application to an industrial case study, being an automotive voltage regulator, clearly showing the technique's capabilities and practical advantages

An Exploratory, Correlational, Self-Rater Study on Authentic Leadership Values of Adventist Local Conference Chief Financial Officers in the United States

The Problem Seventh-day Adventist (SDA) local conference treasurers, or Chief Financial Officers, are trusted by church members to manage the finances of the church and provide financial leadership, yet the denomination does not know how treasurers develop their values and leadership capacity as financial administrators. This study examined how treasurers compare with the leadership values of morality, integrity, and fairness prevalent today in positive forms of leadership theories. It explores SDA treasurer or financial officer self-assessment with the rating that their team members provide, allowing us to know the authenticity of their values as leaders. Method This is a census of a population composed of 50 local conference treasurers, leaders, and 148 followers composed of associates in treasury work and academy treasurers. The participants responded to the Authentic Leadership Questionnaire 1.0 online. Their responses allowed us to know how treasurers see themselves, and how their followers see them. The instrument tested both groups in four dimensions: (a) Relational Transparency, (b) Balanced Processing of Opinions, (c) Ethical/Moral Values, and (d) Self-Awareness, and their responses were processed anonymously online by Mind Garden, Inc. The aggregate responses were analyzed in SPSS. Conclusions The results indicate that the self-perceptions of the leaders are significantly higher than the perceptions reported by their followers. The follower group of associates in treasury consistently gave lower means (μ) than did the academy treasurers. The role played by the participants in the study (local conference treasurers, associates in treasury, and academy treasurers) was significantly related to the responses they provided. The leaders’ personal characteristics are significantly related to their own self-perception about authentic leadership, and followers’ personal characteristics are also significantly related to how they perceive the authenticity of their leaders. Beta (β) coefficients of treasurers’ personal characteristics indicate that the longer they work for the denomination, the less authentic they are as leaders. The longer followers work for the denomination, the less they believe in their leaders as authentic leaders. The disagreement in the perceptions of leaders and followers may be an indication of a disconnect, possibly a degree of discomfort, distrust, skepticism or dissatisfaction made evident by the lower statistical means of the followers. This erosion of influence points to issues of power, authority, and leadership within the Adventist church structure. Conference treasurers may not be fulfilling their leadership role appropriately

Efficient optimization of the integrity behavior of analog nonlinear devices using surrogate models

A novel technique to analyze and optimize the integrity behavior of nonlinear analog devices in the presence of noise is proposed. The technique leverages surrogate models, as such reducing the simulation time, avoiding time-consuming and expensive measurements after tape-out and hiding the original netlist of the circuit, while maintaining high accuracy. Easy integration of the surrogates into a circuit simulator together with pertinent subcircuits representing, e. g., board and package, allows mimicking the integrity behavior of a complete setup while still being in the design phase. In this contribution, the method is applied to a case study, being a voltage regulator designed for automotive applications

Nuclear resonant surface diffraction

Nuclear resonant x-ray diffraction in grazing incidence geometry is used to determine the lateral magnetic configuration in a one-dimensional lattice of ferromagnetic nanostripes. During magnetic reversal, strong nuclear superstructure diffraction peaks appear in addition to the electronic ones due to an antiferromagnetic order in the nanostripe lattice. We show that the analysis of the angular distribution of the resonantly diffracted x-rays together with the time-dependence of the coherently diffracted nuclear signal reveals surface spin structures with very high sensitivity. This novel scattering technique provides a unique access to laterally correlated spin configurations in magnetically ordered nanostructures and, in perspective, also to their dynamics