Imaging features of rare mesenychmal liver tumours: beyond haemangiomas.

Tumours arising from mesenchymal tissue components such as vascular, fibrous and adipose tissue can manifest in the liver. Although histopathology is often necessary for definitive diagnosis, many of these lesions exhibit characteristic imaging features. The radiologist plays an important role in suggesting the diagnosis, which can direct appropriate immunohistochemical staining at histology. The aim of this review is to present clinical and imaging findings of a spectrum of mesenchymal liver tumours such as haemangioma, epithelioid haemangioendothelioma, lipoma, PEComa, angiosarcoma, inflammatory myofibroblastic tumour, solitary fibrous tumour, leiomyoma, leiomyosarcoma, Kaposi sarcoma, mesenchymal hamartoma, undifferentiated embryonal sarcoma, rhabdomyosarcoma and hepatic metastases. Knowledge of the characteristic features of these tumours will aid in guiding the radiologic diagnosis and appropriate patient management

The shape of two-dimensional space

Genomics, so fashionable today, is only half of the secret of life. The other half of the secret is shape, form, morphogenesis and metamorphosis. The gene may prescribe what is synthesised, but the proteins appear and operate in a pre-existing environment which they then change. The first step towards life is the appearance of a micelle, a spherical membrane, a surface which separates the world into inside and outside. We are here concerned with surfaces, with a particular subset of two-dimensional manifolds embedded in three-dimensional Euclidean space, namely the non-self-intersecting, periodic minimal surfaces of cubic symmetry, which separate the world into two regions as an infinite plane would do, but with much more complex topologies. Like the Platonic solids , these cubic surfaces are geometrical absolutes and have distinctive topologies but entail no arbitrary parameters . The objective is to enumerate at least some of these surfaces, for probably an infinite number answer to this description, to draw attention to their geometry and to point to some of their applications and occurrences on various scales between mega-engineering and nano-technology. These objects are solutions looking for problems

Perception: Exploring Cognition and Consciousness Through Visual Art

The concept of consciousness has perplexed humankind for thousands of years. Countless scientists, philosophers, and artists have devoted their lifetimes to solving humanity’s questions about our relationship with the world we live within. The creative arts, such as music, theater, and visual art, can facilitate critical thinking and meaningful interpersonal communication. This paper explores the visual artwork of the author, Sunny Shepherd, through examination of historical and contemporary artistic influences on the work, as well as the psychological and philosophical concepts that fuel it. Months of research, planning, and creating went into the manifestation of the final exhibition, Metamorphosis , which was open in Western Kentucky University’s Fine Arts Center Cube Gallery April 29-May 3, 2019

Between a White Cube, Black Box, and Warehouse: Constructing Spaces for Contemporary Art throughout the Recent Museum Building Boom

Since the 1990s, museum buildings and the art housed inside them have undergone dramatic changes. Once canonical structures, they have evolved to more suitably contain new art forms and reflect the expanding and dynamic purposes of the museum. Museum architecture constructs the meanings and values of institutions as its primary and most tangible symbol. It commands a specific approach for display rhetoric and dictates the ways users and curators make use of space. What is the relationship between the latest museum building boom and contemporary art? What specific architectural strategies are employed by museums and architects to suit contemporary art? This paper examines the recent trends in museum construction in order to explore the ways in which new museums have reshaped the museum experience and dialogue between users and contemporary art.Desde la década de 1990 los edificios de los museos y el arte alojado en ellos han sufrido cambios dramáticos. Las estructuras canónicas han evolucionado para contener de manera más adecuada nuevas formas de arte y reflejar los propósitos dinámicos y en expansión del museo. La arquitectura del museo manifiesta los significados y valores de la propia institución como su símbolo principal y más tangible, presenta un enfoque específico para mostrar la retórica y dicta las formas en que los usuarios y los curadores hacen uso del espacio. ¿Cuál es la relación entre el último auge de la construcción de museos y el arte contemporáneo? ¿Qué estrategias arquitectónicas específicas emplean los museos y arquitectos para adaptarse al arte contemporáneo? Este artículo examina las tendencias recientes en la construcción de museos para explorar las formas en que los nuevos espacios han reformulado la experiencia y el diálogo entre los usuarios y el arte contemporáneo

PCB Origami: A Material-Based Design Approach to Computer-Aided Foldable Electronic Devices

Origami is traditionally implemented in paper, which is a passive material. This research explores the use of material with embedded electronics such as printed circuit boards (PCB) as the medium for origami folding to create an interactive folding experience and to generate foldable objects with added functionalities. PCBs are produced as 2D shapes. By folding PCB arrays, it is possible to create 3D objects that contain electronic functions. Conductivity, output devices (such as light emitting diodes) and microcontroller computation can create an interactive folding experience, for user guidance and verification of the folding. We call this approach and methodology PCB origami. The work presented in this paper describes two unique interaction and fabrication techniques for creating and folding electronic materials. We demonstrate prototypes and present verification/evaluation strategies for guiding the user through the folding process

Nonorthogonal Polyhedra Built from Rectangles

We prove that any polyhedron of genus zero or genus one built out of rectangular faces must be an orthogonal polyhedron, but that there are nonorthogonal polyhedra of genus seven all of whose faces are rectangles. This leads to a resolution of a question posed by Biedl, Lubiw, and Sun [BLS99].Comment: 19 pages, 20 figures. Revised version makes two corrections: The statement of the old Lemma 14 was incorrect. It has been corrected and merged with Lemma 13 now. Second, Figure 19 (a skew quadrilateral) was incorrect, and is now removed. It played no substantive role in the proof

Convolution filtering of continuous signed distance fields for polygonal meshes

Signed distance fields obtained from polygonal meshes are commonly used in various applications. However, they can have C1 discontinuities causing creases to appear when applying operations such as blending or metamorphosis. The focus of this work is to efficiently evaluate the signed distance function and to apply a smoothing filter to it while preserving the shape of the initial mesh. The resulting function is smooth almost everywhere, while preserving the exact shape of the polygonal mesh. Due to its low complexity, the proposed filtering technique remains fast compared to its main alternatives providing C1-continuous distance field approximation. Several applications are presented such as blending, metamorphosis and heterogeneous modelling with polygonal meshes

Inclusive Design in Assisted Instruction

Much instruction starts with abstract representations for which learners have insufficient foundation [1]. The British Standard, BS 7000-6:2005 Guide to Managing Inclusive Design, provides a comprehensive framework that can help all private enterprises, public sector and not-for-profit organizations, build a consistent approach to inclusive design into organizational culture as well as processes [2]. While courses, technology, and student services are typically designed for the narrow range of characteristics of the average student, the practice of universal design in education (UDE) considers people with a broad range of characteristics in the design of all educational products and environments [3]. This paper has been designed to provide an overview about the curriculum paradigm consisting in the fusion of the technology and the classroom instruction in economic higher education.information gap, concept map, active learning design, student-centred learning