Haemoglobin and size dependent constraints on swimbladder inflation in fish larvae

In developmental studies of fish species (especially physostomians) it could be demonstrated, that the lack of haemoglobin during larval and juvenile stages is a relatively common phenomenon. Generally it is linked with body translucency. In representatives of the families Galaxiidae, Osmeridae and Clupeidae, partly reared, partly observed immediately after being caught in the wild, it turned out, that this condition coincides with a considerable delay in swimbladder inflation. To determine the moment of its first inflation, larvae placed in a hermetic chamber were observed under a dissecting microscope. While lowering the pressure, the expanding swimbladder showed whether or not its content is really gaseous. The reason postulated to be responsible for the delayed inflation is that larvae lacking haemoglobin do not have the possibility of oxygen transport to their buoyancy organ by means of the blood. Apart of this, capillarity force calculations and body force estimations show that with decreasing size the constraints linked with surface tension increase overproportionally. While in larger sized larvae like trout we could demonstrate inflation by swallowing air, in species with small larvae this was not the case. Below a certain size, even in physostomians, the ductus pneumaticus is no alternative to the blood pathway for swimbladder inflation

Topological Foundations of Cognitive Science

A collection of papers presented at the First International Summer Institute in Cognitive Science, University at Buffalo, July 1994, including the following papers: ** Topological Foundations of Cognitive Science, Barry Smith ** The Bounds of Axiomatisation, Graham White ** Rethinking Boundaries, Wojciech Zelaniec ** Sheaf Mereology and Space Cognition, Jean Petitot ** A Mereotopological Definition of 'Point', Carola Eschenbach ** Discreteness, Finiteness, and the Structure of Topological Spaces, Christopher Habel ** Mass Reference and the Geometry of Solids, Almerindo E. Ojeda ** Defining a 'Doughnut' Made Difficult, N .M. Gotts ** A Theory of Spatial Regions with Indeterminate Boundaries, A.G. Cohn and N.M. Gotts ** Mereotopological Construction of Time from Events, Fabio Pianesi and Achille C. Varzi ** Computational Mereology: A Study of Part-of Relations for Multi-media Indexing, Wlodek Zadrozny and Michelle Ki

Computing the Yolk in Spatial Voting Games without Computing Median Lines

The yolk is an important concept in spatial voting games as it generalises the equilibrium and provides bounds on the uncovered set. We present near-linear time algorithms for computing the yolk in the spatial voting model in the plane. To the best of our knowledge our algorithm is the first algorithm that does not require precomputing the median lines and hence able to break the existing $O(n^{4/3})$ bound which equals the known upper bound on the number of median lines. We avoid this requirement by using Megiddo's parametric search, which is a powerful framework that could lead to faster algorithms for many other spatial voting problems

The Iowa Homemaker vol.2, no.5-6

Table of Contents Your Child Between the Bottle and School Age by Belle Lowe, page 1 Buy Your Hat From Your Grocery Savings by Blanche Ingersoll, page 2 Has Hosiery Become Your Hobby? by Mildred B. Elder, page 3 Pottery Making as a Community Work by Paul E. Cox, page 4 Fall Forecast for Children’s Frocks by Helen Paschal, page 5 “Ye Hatte Shoppe” As a Summer’s Occupation by Ruth Wilson, page 6 Will Courtesy Count in Your Child’s Career? by Eda Lord Murphy, page 7 Who’s There and Where by Jeanette Beyer, page 10 Card File Your Foreign Terms by Eleanor Murphy, page 10 Rival the Orient With Sealing Wax by Opal Wind, page 11 “Back to Natur”-ing With a Camp Kit by Helen T. Peterson, page 12 The Art of Outcasting Flies by Dorothy Morris, page 1

Arctic seabirds and shrinking sea ice: egg analyses reveal the importance of ice-derived resources

In the Arctic, sea-ice plays a central role in the functioning of marine food webs and its rapid shrinking has large effects on the biota. It is thus crucial to assess the importance of sea-ice and ice-derived resources to Arctic marine species. Here, we used a multi-biomarker approach combining Highly Branched Isoprenoids (HBIs) with δ13C and δ15N to evaluate how much Arctic seabirds rely on sea-ice derived resources during the pre-laying period, and if changes in sea-ice extent and duration affect their investment in reproduction. Eg

San Jon Sentinel, 02-27-1914

https://digitalrepository.unm.edu/san_jon_sentinel_news/1180/thumbnail.jp

Beehive and Icci

Beehive and Icci is a novel chronicling the adventures of its titular animal protagonists. The novel focuses on the characters of Beehive, an anxious bear, and Icci, a sociable bird, throughout their travels within a forest of anthropomorphized animals. This animal narrative is framed by the story of its fictional author, Wilhelm of Aurgarten, whose own eccentricities influence the shape of Beehive and Icci’s goals and inner conflicts. The story of the author is communicated through occasional footnotes, which serve as either informative or humorous anecdotes surrounding the novel’s writing process. Beehive and Icci — and, by extension, Wilhelm and his adopted niece, Mariena — explore questions regarding the value of life, how authority, social norms, and mental illness construct identity, and what it means to be a “person,” regardless of humanity or animality. By exploring human issues through animal characters, Beehive and Icci blurs the boundaries between how we perceive ourselves and others

The Spatial Analysis of Elections and Committees: Four Decades of Research

It has been more than thirty five years since the publication of Downs's (1957) seminal volume on elections and spatial theory and more than forty since Black and Newing (1951) offered their analysis of majority rule and committees. Thus, in response to the question "What have we accomplished since then?" it is not unreasonable to suppose that the appropriate answer would be "a great deal." Unfortunately, reality admits of only a more ambiguous response