Developing an Adventist Concept of Spirituality

What is spirituality? How do we recognize it in the lives of individuals and in the life of the church

Battling the Worship Committee

An honest look at pastors and their truest role in corporate worship

And Jesus Came Preaching...

Jesus is the greatest preacher the world has ever known. Yet we have only two of His sermons recorded in full: the Sermon on the Mount (Matt. 5-7), and the Sermon on the Mount of Olives (Matt. 24,25). It could be argued that the Olives sermon really doesn\u27t count as one because Jesus\u27 congregation was limited to His disciples. There are, of course, other speeches or talks that Jesus gave: long ones like John 14-17, but these were given on a more personal level; and short ones that probably came from sermons, but we don\u27t have the full text. However, we have enough of the con tent and style of Jesus\u27 preaching so that we can learn much from Him. Here are eight great principles that define Jesus as the great preacher that He was

Ministry Lessons from War

Front line service brings with it a sharpening focus on life and the harsh realities of faith

The Challenge of Change

The past century has brought an accelerating rush of change within society that has impacted the church as well

Reclaiming Church Identity in a Whatever Society

Though this whatever attitude can be problematic enough within society, it\u27s now seen within churches

Signs to Life: Reading and Responding to John\u27s Gospel

For link to live interview click here

Verification of Space Station Secondary Power System Stability Using Design of Experiment

This paper describes analytical methods used in verification of large DC power systems with applications to the International Space Station (ISS). Large DC power systems contain many switching power converters with negative resistor characteristics. The ISS power system presents numerous challenges with respect to system stability such as complex sources and undefined loads. The Space Station program has developed impedance specifications for sources and loads. The overall approach to system stability consists of specific hardware requirements coupled with extensive system analysis and testing. Testing of large complex distributed power systems is not practical due to size and complexity of the system. Computer modeling has been extensively used to develop hardware specifications as well as to identify system configurations for lab testing. The statistical method of Design of Experiments (DoE) is used as an analysis tool for verification of these large systems. DOE reduces the number of computer runs which are necessary to analyze the performance of a complex power system consisting of hundreds of DC/DC converters. DoE also provides valuable information about the effect of changes in system parameters on the performance of the system. DoE provides information about various operating scenarios and identification of the ones with potential for instability. In this paper we will describe how we have used computer modeling to analyze a large DC power system. A brief description of DoE is given. Examples using applications of DoE to analysis and verification of the ISS power system are provided

Modeling and Dynamic Analysis of Paralleled dc/dc Converters With Master-Slave Current Sharing Control

A simple, application-oriented, transfer function model of paralleled converters employing Master-Slave Current-sharing (MSC) control is developed. Dynamically, the Master converter retains its original design characteristics; all the Slave converters are forced to depart significantly from their original design characteristics into current-controlled current sources. Five distinct loop gains to assess system stability and performance are identified and their physical significance is described. A design methodology for the current share compensator is presented. The effect of this current sharing scheme on 'system output impedance' is analyzed