Tip streaming from drops flowing in a spiral microchannel

This fluid dynamics video shows drops of water being transported by a mean flow of oil, in a microchannel shaped as a logarithmic spiral. The channel shape means that the drops are submitted to an increasing shear and elongation as they flow nearer to the center of the spiral. A critical point is reached at which a long singular tail is observed behind the drops, indicating that the drops are accelerating. This is called "Tip streaming".Comment: Abstract accompanying movie to the Gallery of Fluid Motion: APS-DFD 200

H Space: Interactive Augmented Reality Art

open accessThis artwork exploits recent research into augmented reality systems, such as the HoloLens, for building creative interaction in augmented reality. The work is being conducted in the context of interactive art experiences. The first version of the audience experience of the artwork, “H Space”, was informally tested in the SIGGRAPH 2018 Art Gallery context. Experiences with a later, improved, version was evaluated at Tsinghua University. The latest distributed version will be shown in Sydney. The paper describes the concept, the background in both the art and the technological domain and points to some of the key computer human interaction art research issues that the work highlights

Pulsation modes in rapidly rotating stellar models based on the Self-Consistent Field method

Context: New observational means such as the space missions CoRoT and Kepler and ground-based networks are and will be collecting stellar pulsation data with unprecedented accuracy. A significant fraction of the stars in which pulsations are observed are rotating rapidly. Aims: Our aim is to characterise pulsation modes in rapidly rotating stellar models so as to be able to interpret asteroseismic data from such stars. Methods: The pulsation code developed in Ligni\`eres et al. (2006) and Reese et al. (2006) is applied to stellar models based on the self-consistent field (SCF) method (Jackson et al. 2004, 2005, MacGregor et al. 2007). Results: Pulsation modes in SCF models follow a similar behaviour to those in uniformly rotating polytropic models, provided that the rotation profile is not too differential. Pulsation modes fall into different categories, the three main ones being island, chaotic, and whispering gallery modes, which are rotating counterparts to modes with low, medium, and high l-|m| values, respectively. The frequencies of the island modes follow an asymptotic pattern quite similar to what was found for polytropic models. Extending this asymptotic formula to higher azimuthal orders reveals more subtle behaviour as a function of m and provides a first estimate of the average advection of pulsation modes by rotation. Further calculations based on a variational principle confirm this estimate and provide rotation kernels that could be used in inversion methods. When the rotation profile becomes highly differential, it becomes more and more difficult to find island and whispering gallery modes at low azimuthal orders. At high azimuthal orders, whispering gallery modes, and in some cases island modes, reappear.Comment: 16 pages, 11 figures, accepted for publication in A&

Response oral / response

This work in four parts offers the practice of Bartram O’Neill, a collaborative partnership between an artist (Angela Bartram), and an artist/writer (Mary O’Neill), as an alternative creative strategy to the binaries of theory and practice, academic and artistic, event and text. To borrow and extend Wallace Bacon’s shore metaphor from his canonical publication, “The Dangerous Shore: From Elocution to Interpretation” (1960), this essay in four documents represents an amphibious practice in which different stages of its life cycle require different media.[1.] The four parts are: a score written during the performance Oral/Response that forms part of the event; images of the collaborative performance of the same title at Greestone Gallery, Lincoln (2011); a prose piece written in response to the performance; and questions and answers that discuss the concerns of the artists and the collaborative relationship. Each mode has informed the others and is a response to different sites. A gallery, an academic journal, an artist’s statement – these are all “sites” not only defined by a physical location, but they consist of dynamic ensembles that also include the artists’ bodies, the anticipated audience, any objects being used, and the atmosphere. Bacon categorized the relationship between the text and the performance as a negotiation between polarized opposites using the metaphor of travelling through waterways. This negotiation exists in the territory where the distinction between land and sea is blurred, the alluvial plains where rather than prioritizing one form over another, each manifestation generates potential for further responses. The result is an ongoing work

Mrs. Lillian G. Lamden in the University of Dayton Art Gallery

News release announcing a collection of works done in aluminum sculpture by Mrs. Lillian G. Lamden is being featured in the University of Dayton Art Gallery

EFEKTIVITAS STRATEGI PEMBELAJARAN GALLERY WALK TERHADAP MINAT BELAJAR FIQH PADA SISWA KELAS VIII MTS SWASTA FAJRUL IMAN PATUMBAK

This study aims to determine the students' interest in learning Fiqh before and after being taught using the Gallery Walk learning strategy, and the effectiveness of the Gallery Walk learning strategy on the interest in learning Fiqh of the VIII grade students of MTs Swasta Fajrul Iman Patumbak. The population in this study were all students of class VIII MTs Swasta Fajrul Iman Patumbak for the academic year 2021/2022, totaling 152 students. The sample of this research was determined using random sampling technique as many as 38 students of class VIII. This research method is a descriptive method of correlational statistical techniques with a quantitative approach. Data collection methods used are: by conducting observations and questionnaires. The conclusions obtained from this study are: Interest in learning Fiqh of class VIII MTs Swasta Fajrul Iman Patumbak before the Gallery Walk learning strategy was applied got an average score of 66.11 including category C (medium). Interest in learning Fiqh students of class VIII MTs Private Fajrul Iman Patumbak before the Gallery Walk learning strategy was applied got an average score of 85.57 including category A (very good). The Gallery Walk learning strategy is effectively used in increasing students' interest in learning Fiqh with the provisions of tcount ttable, namely 9.89 1.688. With this provision, the hypothesis is accepted. With a significant level of = 0.05, the implementation of the Gallery Walk learning strategy helped 49.07% in increasing students' interest in learning Fiqh