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Functional safety of machine controls
The EN ISO 13849-1 standard, “Safety of machinery – Safety-related parts of control systems”, contains provisions governing the design of such parts. This report is an update of BGIA Report 2/2008e of the same name. It describes the essential subject-matter of the standard in its third, revised 2015 edition, and explains its application with reference to numerous examples from the fields of electromechanics, fluidics, electronics and programmable electronics, including control systems employing mixed technologies. The standard is placed in its context of the essential safety requirements of the Machinery Directive, and possible methods for risk assessment are presented. Based upon this...
Safe drive controls with frequency inverters
Machine drives using closed-loop speed control are state of the art. As on drives without closed-loop speed control, the movement of a machine part at varying speeds frequently gives rise to a hazard against which the machine operators must be protected. The simplest means of preventing movements during manual intervention in danger zones is the (safe) disconnection of the energy driving the relevant motors. This is however often not possible, for example when intervention is required whilst the machine is running for the purpose of clearing faults, setup, during test operation, etc. Scenarios such as these require the machine to be operated with protective equipment disabled. In order for t...
Vegetation of the Canary Islands
The volcanic and oceanic nature of the Canary Islands, its rich plant biodiversity and high rate of endemism, as well as the relict character of some of its plant communities make it a territory of great biological interest. The main geographic, climatic, bioclimatic, biogeographic and floristic features of the Islands are shown and related to the distributional pattern of potential communities along an altitudinal gradient. Current vegetation units and their ecology are described and illustrated with numerous pictures. Potential vegetation units are summarized and comprehensive maps of the potential natural vegetation for each island are given. Human impact on the natural landscape, the occurrence of invasive plants, and the probable impact of climate change on the flora and vegetation are discussed. The conservation status of flora and vegetation are assessed. Four appendixes include a syntaxonomical scheme, a brief history of botanical studies and explorations in the Islands, ethnobotanical notes, and a list of selected literature.
New Testament Pattern
What is the nature of Christian unity? Is it Sacramental, Organic, Federal, Spiritual? These are questions that demand careful examination when different Christian traditions are drawing closer to one another in a common desire to heal the divisions that hinder the witness of the Church to the world. In any attempt to deal with these questions, full weight must be given to the evidence of the New Testament itself: what kind of unity does it reveal? In New Testament Pattern, Jean-Louis Leuba reveals a two-fold framework of unity in the New Testament. One strand - in its witness to Christ, to the Apostles and to the Church - emphasises the institutional, traditional and particular. The other strand emphasises the personal, dynamic and universal. Yet the two strands are actually one. Their unity is more comprehensive, more creative, than any undifferentiated unity could be, with important implications for ecumenism and broader scriptural study.
The Badger
UW Archives holds up to three copies of each volume of the yearbook from its initial publication in 1884 to its final publication in 2014 (129 volumes). The publication of the yearbook did not become annual until 1887, as such there are no yearbooks for 1885 or 1886. The only other interruption in yearbooks was for the years 1973 and 1974. There are still yearbooks from these years, but they were published by the Wisconsin Alumni Association rather than the student body, as such they are spare, consisting mostly of portraits of students. UW Archives currently holds at least one copy of every published volume. The 1st copy of each volume is held onsite at UW Archives while the second and third copies, where they exist, are held offsite.
The Letter to the Philippians
In this commentary G. Walter Hansen offers rich exposition of the text of Philippians as well as wisdom and maturity in its application. In so doing he emphasizes partnership--the social and corporate dimensions of community--in the progress of the gospel. After a select bibliography, Hansen's introduction sets forth the historical setting of the church in Philippi, the nature and occasion of the letter, and a preview of two key themes--the gospel of Christ and the community in Christ. The commentary itself discusses Philippians in light of these themes, considering Paul's greetings, reports of gospel ministry, imperatives for citizens worthy of the gospel, recommendations of two Christ-like servants, and disclosures of his personal experience. Hansen's treatment as a whole is distinctive for the way it draws out and highlights the themes of partnership, citizenship, and friendship in Paul's Philippian letter. "With themes and emotions so varied, the letter to the Philippians needs a commentator with a sure grasp and a warm heart. . . . Hansen writes with admirable clarity and simplicity, even when he is unpacking notoriously complex matters." -- D. A. Carson (from the preface)
Where Christology Began
One of the best known and most influential passages in the New Testament is the hymn of Philippians 2:5-11, which traces the dialectical path of Christ from preexistence--or pretemporal existence--to incarnation and exaltation. There is little agreement and a great deal of debate on this central text of Christian theology. In this book, an international group of scholars comment on the classic and current understandings of this passage, searching for insights into the ongoing exegetical inquiry.
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