Defending Against Medical Error: Personal Reflections on the Legacy of John Senders

Objective To honor the legacy of John Senders, a distinguished member of the Human Factors and Ergonomics Society, by a short, personal history of him, but then to honor his legacy by extending it through our own professional opinions, with an emphasis on the study of human error and its implications for healthcare systems—two topics in which he excelled. Background The authors are familiar with the topic and subject matter. One was a friend of Senders for over 50 years. Another was a collaborator and joint author with Senders (as well as his stepdaughter). All three authors have extensive publications in the topic areas. Method, Results, and Conclusion The authors used personal accounts of interactions with Senders at conferences, experiences living and working with him, and a brief review of his most personal, notable publications in healthcare. The reflections indicate a strong resonance on Senders’ contributions to system design that are relevant today in healthcare’s most challenging period in its history.

Codimension two 1:1 strong resonance bifurcation in a discrete predator-prey model with Holling Ⅳ functional response

<abstract><p>In this paper we revisit a discrete predator-prey model with Holling Ⅳ functional response. By using the method of semidiscretization, we obtain new discrete version of this predator-prey model. Some new results, besides its stability of all fixed points and the transcritical bifurcation, mainly for codimension two 1:1 strong resonance bifurcation, are derived by using the center manifold theorem and bifurcation theory, showing that this system possesses complicate dynamical properties.</p></abstract>

Counter-realities and conflicted place: Gee Vaucher’s The Feeding of the Five Thousand in the punk art tradition

This article celebrates and critically examines Gee Vaucher’s artwork for the Crass album The Feeding of the Five Thousand (1978), drawing upon the enduring fascination that the work retains. Vaucher’s work is complex, disconcerting and mesmeric, and my intention is to pin down the facets of the work that achieve these qualities. The work sits in a tradition of collage and montage taken up in British punk and post-punk scenes, and I examine a selection of classic punk artworks in comparison to Dada artworks that represent the origins of radical montage art. Whilst acknowledging the established mode of interpreting this work through indexical context of elements and the force of juxtaposition (e.g. Linder Stirling’s punk work), I argue that Vaucher’s work achieves something more and requires additional methods of analysis. By developing a formalist approach of illusionistic harmony and integrity, I consider the space of the picture plane, as a traditional art concept and the space and place of the depicted behind the picture plane. Vaucher’s work offers an enduring feeling of a conflicted, disrupted and corrupted space – you feel you can step into a real space within the picture but prefer to hover on the safe side of the picture plane. This property embodies what the author Mark Fisher calls the ‘weird and the eerie’. I then examine a number of artworks from within and around the canon of art – Alison and Peter Smithson, Martha Rosler and Tish Murtha – finding images that I feel have a strong resonance with Vaucher’s work in terms of the spaces they construct and the mode of construction. These canonical works offer some developed critical dialogue to bring to bear on Vaucher’s work in order to fully understand the power of this iconic record sleeve.

Powstanie Wielkanocne w prasie polskiej (Komentarze polityczne)

Easter Rising in the Polish Press (Political Commentaries)The author of the paper describes the ways in which the Polish press were informed about the Easter Rising, sources of gaining this knowledge (Reuters Agency and European daily newspapers); particularly, he makes analysis of political commentaries which were published in Warsaw, Cracow and Lvov newspapers. He shows a specific character of Polish reaction to the events in Ireland, which was rooted in the analogy of historical destiny of both nations, and gained a particularly strong resonance on the turn of April and May 1916. The author points out to the causes of this resonance of which a gradual change in the attitude of the Polish society towards Germany was the most important. The permission of German authorities-in-occupation for a great national manifestation in Warsaw on 3 May 1916 strengthened the orientation towards the central states which was evidenced by the participation of the political figuring on Germany in this event. Reports of the fall of the uprising in Ireland and the accompanying commen aries coincided with comprehensive accounts of manifestation celebrating 125th ann versary of 3rd May Constitution, which was of significant importance for the reception of the Easter Rising. Emotional stress in Warsaw, strongly stimulating patriotic feelings, created an extremely emotional attitude towards the uprising in Dublin experienced by Poles as a charter almost from their history.

Numerical Detection and Analysis of Strong Resonance Bifurcations with a Reflection Symmetry and Some Applications in Economics and Neural Networks

This paper is concerned with the strong resonance bifurcations with a reflection symmetry i.e. [Formula: see text]-symmetry in maps. We compute the normal form of [Formula: see text] resonance and [Formula: see text] resonance bifurcations with [Formula: see text]-symmetry. We use standard normal form techniques in order to obtain the reduced map. Then, we will obtain explicit formulae for normal form coefficients of bifurcations with [Formula: see text]-symmetry. By using critical coefficients, we avoid the computation of the center manifold and the transformation of the linear part of the map into Jordan form. So this method can be used in the study of bifurcations with [Formula: see text]-symmetry in general problems. To illustrate our results, we will analyze local bifurcations of the strong resonance bifurcations with [Formula: see text]-symmetry numerically and then we will present some applications from economics and neural networks.

Strong Resonance Investigation and Suppression in PMSG integrated Power Systems

Permanent magnet synchronous generators (PMSGs) with full converters have been widely used in wind power generation due to its superior flexibility and controllability. However, under some circumstance, the oscillation modes of PMSG (POMs) may excite strong resonance with the electromechanical oscillation modes (EOMs) of the power system that degrades the power system small signal stability. In this paper, A two-open-loop subsystem model is firstly derived to analyze the oscillation modes. Then the POMs are investigated with modal analysis, the relationship between POMs and related controllers are clarified. On this basis, the strong resonance between PMSG and the external power system is revealed and identified. Furthermore, a five-step parameter tuning method is proposed to relocate the position of POM as well as suppress the strong resonance. Both modal analysis and time-domain simulations validate the effectiveness of the proposed method.