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The art of origami, or paper folding, is carried out using a square piece of paper to obtain attractive figures of animals, flowers or other familiar figures. It is easy to see that origami has links with geometry. Creases and edges represent lines, intersecting creases and edges make angles, while the intersections themselves represent points. Because of its manipulative and experiential nature, origami could become an effective context for the learning and teaching of geometry.In this unique and original book, origami is an object of mathematical exploration. The activities in this book diff

Origami. --- Polyhedra --- Geometrical models --- Japanese paper folding --- Paper folding, Japanese --- Paper work --- Models.

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Paper industry --- Green movement --- Environmental aspects

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Belgian artist, designer, and interior decorator Isabelle de Borchgrave has created exquisite paper dresses evoking high fashions from the courts of the Medici in the Renaissance to the legendary Fortuny silks of the early 20th century. Their historical authenticity, combined with their startling realism, caused an overnight sensation when they were first shown in France in 1998 as “papiers à la mode.” Since then, the dynamic, light-hearted collection has traveled all over the world to critical and popular acclaim.

Paper Illusions does full justice to De Borchgrave’s magical workshop, where paper is cut, folded, and painted on the way to being transformed into shimmering visions of beautiful clothing and luxurious living. In Rene Stoeltie’s vivid photographs, figures from the history of style seem to breathe in atmospheric rooms, while details of color, pattern, and form jump off the page. It is a publishing event of unprecedented creativity, wit, and elegance.

Borchgrave, de, Isabelle --- Clothing --- Clothing and dress --- Dress --- Habillement --- Habits --- Kledij --- Kleding --- Paper craft --- Paper folding (Handicraft) --- Paper work --- Paper-cutting --- Papercraft --- Papier [Travail du ] --- Papierbewerking --- Vêtement --- De Borchgrave, Isabelle --- Borchgrave, Isabelle de --- Manufacturing technologies --- fashion design --- papierkunst

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Uniflorous species are extremely rare within the large rain forest genus Ixora. On Madagascar, however, six uniflorous species occur. Five of these belong to section Microthamnus, which is revised here. A description and illustration is provided for all species, together with a determination key. Two species, I. clandestina and I. rakotonasoloi, are newly described. The species of Microthamnus are special, not only because of their uniflorous inflorescences, but also because the ovary, calyx and base of the corolla tube of the single flower is enclosed within the stipular cone of the inflorescence-supporting leaf pair, a type of organization which is extremely rare in the Rubiaceae

BR Staff Publications [a] (paper in international, peer reviewed journal)

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Urban forests are generally fragmented in small isolated remnants, embedded in an inhospitable human-used matrix, and incur strong anthropogenic pressures (recreational activities, artificialization, pollution and eutrophication). These lead to particularly high constraints even for common forest herbs, whose genetic response may depend on life-history traits and population demographic status. This study investigated genetic variation and structure for 20 allozyme loci in 14 populations of Primula elatior, a self-incompatible long-lived perennial herb, occurring in forest fragments of Brussels urban zone (Belgium), in relation to population size and young plants recruitment rate. Urban populations of P. elatior were not genetically depauperate, but the small populations showed reduced allelic richness. Small populations showing high recruitment rates -and therefore potential rejuvenation- revealed lower genetic diversity (Ho and He) than those with low or no recruitment. No such pattern was observed for the large populations. There was a significant genetic differentiation among populations within forest fragments (FSC = 0.052, P < 0.001), but not between fragments (FCT = 0.002, P > 0.10). These findings suggest restricted gene flow among populations within fragments and local processes (genetic drift, inbreeding) affecting small populations, strengthened when there is recruitment. Urban forest populations of long-lived perennial herbs can be of conservation value. However, restoration of small populations by increasing population size through regeneration by seedling recruitment may lead to negative genetic consequences. Additional management, aiming to restore gene flow among populations, may need to be applied to compensate the loss of genetic diversity and to reduce inbreeding

BR Staff Publications [a] (paper in international, peer reviewed journal)