Transport of Food Through the Alimentary Camals of Aquatic Annelids

1948 ◽  
Vol s3-89 (5) ◽  
pp. 47-51
Author(s):  
JEAN HANSON
Keyword(s):  
Alimentary Canal ◽  
Anterior Part ◽  
Gut Contents ◽  
Ciliated Epithelium ◽  
Gut Epithelium ◽  
The University ◽  
Anterior Direction ◽  
Metachronal Waves ◽  
Muscle Coat ◽  
Made In

1. In most serpulids and sabellids the only muscle coat in the wall of the alimentary canal lies outside the blood sinus which envelops it. In a few sabellids there is another muscle coat, of unknown function, between the sinus and the gut epithelium. 2. The muscles outside the sinus contract antiperistaltically and tend to hinder the transport of the gut contents towards the anus. 3. The contents of the alimentary canal are transported by its cilia which beat towards the anus. The metachronal waves of the ciliated epithelium travel in a postero-anterior direction. The ‘ascending ciliary current’ of Stephenson (1913) does not exist. 4. The food boli of serpulids and sabellids rotate as they move down the gut. In Salmacina incrustans the rotation is imparted by cilia in the anterior part of the gut. These observations were made in the Zoological Station of Naples. I wish to record my gratitude to the staff of the Station, to the British Association for the Advancement of Science for the use of its Table, and to the University of London for a grant towards travelling expenses.

scholarly journals Microscopy for Children

2006 ◽  
Vol 14 (3) ◽  
pp. 53-53
Author(s):  
Caroline Schooley
Keyword(s):  
The United States ◽  
Educational Materials ◽  
Real Science ◽  
Curriculum Research ◽  
Early Decision ◽  
National Reputation ◽  
Science Educators ◽  
The University ◽  
Lawrence Hall Of Science ◽  
Made In

Precollege science education in the United States is not what it could, and should, be. Major changes are being made in the way science is taught, but delivering those changes to thousands of schools is an enormous task. Scientific societies are a major resource; they can organize and train member-volunteers to help teachers bring “real” science to the classroom. The Microscopy Society of America has become part of the effort with Project MICRO (Microscopy In Curriculum - Research Outreach). MICRO is putting MSA members, teaching materials, and microscopes in middle school classrooms nationwide. The idea began in 1993, but it has taken a lot of time and effort to implement.MSA's early decision to collaborate with experienced science educators at the Lawrence Hall of Science of the University of California at Berkeley was a wise one; their educational materials have a well-earned national reputation for excellence.

scholarly journals Self-splitting Abelian groups

2001 ◽  
Vol 64 (1) ◽  
pp. 71-79 ◽  
Author(s):  
P. Schultz
Keyword(s):  
Abelian Group ◽  
Direct Product ◽  
Free Module ◽  
Research Report ◽  
Original Form ◽  
Original Research ◽  
Direct Sum ◽  
The University ◽  
Torsion Free ◽  
Made In

G is reduced torsion-free A belian group such that for every direct sum ⊕G of copies of G, Ext(⊕G, ⊕G) = 0 if and only if G is a free module over a rank 1 ring. For every direct product ΠG of copies of G, Ext(ΠG,ΠG) = 0 if and only if G is cotorsion.This paper began as a Research Report of the Department of Mathematics of the University of Western Australia in 1988, and circulated among members of the Abelian group community. However, it was never submitted for publication. The results have been cited, widely, and since copies of the original research report are no longer available, the paper is presented here in its original form in Sections 1 to 5. In Section 6, I survey the progress that has been made in the topic since 1988.

ACCURACY ANALYSIS OF DIFFERENT SURFACE RECONSTRUCTION MODELLING METHODS FOR HERITAGE OBJECTS DIGITIZED CONSIDERING PHOTOGRAMMETRIC DATA / SKIRTINGŲ RELJEFO MODELIAVIMO METODŲ, SUDARYTŲ PAGAL PAVELDO OBJEKTO FOTOGRAMETRINIUS DUOMENIS, TIKSLUMO ANALIZĖ / АНАЛИЗ ТОЧНОСТИ РАЗНЫХ МЕТОДОВ МОДЕЛИРОВАНИЯ ПОВЕРХНОСТИ, СОСТАВЛЕННЫХ В СООТВЕТСТВИИ С ФОТОГРАММЕТРИЧЕСКИМИ ДАННЫМИ ОБЪЕКТА АРХИТЕКТУРНОГО НАСЛЕДИЯ

2011 ◽  
Vol 37 (2) ◽  
pp. 56-62
Author(s):  
Jūratė Sužiedelytė-Visockienė ◽  
Aušra Kumetaitienė ◽  
Renata Bagdžiūnaitė
Keyword(s):  
Initial Data ◽  
Surface Reconstruction ◽  
Digital Images ◽  
Digital Camera ◽  
Accuracy Analysis ◽  
Triangulated Irregular Network ◽  
Modelling Analysis ◽  
The University ◽  
Modelling Methods ◽  
Made In

The article explains the possibilities of reconstructing heritage objects. Measurements were made using photogrammetric data received from digital images taken by the Canon EOS 1D Mark III digital camera calibrated in the Institute of Photogrammetry at the University of Bonn (Germany). The images were received applying the PhotoMod photogrammetric software produced in Russia. TIN (Triangulated Irregular Network) and an orthophoto map were made in the investigated objects. The modelling analysis of TIN data was made using ArcGIS software. The purpose of the article is to reconstruct the surface of heritage objects referring to photogrammetric data, to investigate accuracy dependence of heritage object reflection on the methods of preparing the initial data and to evaluate the influence of modelling methods on to the accuracy of reconstructing heritage objects when modelling photogrammetric data and selecting the most appropriate method of modelling parameters to restore the most accurate surface of the heritage object. Santrauka Straipsnyje aprašomos paveldo – architektūrinio objekto paviršiaus modeliavimo galimybės. Modeliavimas atliktas pagal fotogrametrinius objekto duomenis–skaitmenines nuotraukas, darytas kalibruota fotokamera Canon EOS 1D Mark III. Kamera kalibruota Bonos universiteto Fotogrametrijos institute (Vokietija). Objekto nuotraukos apdorotos fotogrametrine kompiuterine programa PhotoMod (Rusija). Sudaryta objekto ortofotografinė nuotrauka ir, parenkant skirtingus duomenų šaltinius, paviršiaus TIN (triangulated irregular network). Skirtingais metodais, naudojantis ArcGIS programa, atliktas fotogrametrinių TIN duomenų modeliavimas ir gauti objekto paviršiaus vaizdai. Įvertintas rezultatų tikslumas ir kokybė. Резюме Описываются возможности моделирования поверхности объекта архитектурного наследия. Моделирование осуществляется с использованием фотограмметрических данных объекта – цифровых снимков, снятых калибрированной цифровой камерой Canon EOS 1D Mark III. Камера калибрирована в Институте фотограмметрии Боннского университета (Германия). Снимки объекта обработаны по фотограмметрической компьютерной программе PhotoMod (Россия). Cделан ортофотографический снимок объекта и с помощью разных источников данных TIN (Triangulated Irregular Network) поверхности. Используя программу ArcGIS, разными методами проведено моделирование фотограмметрических TIN данных и получены изображения поверхности объекта. Осуществлена оценка точности и качества результатов.

scholarly journals 9 Degrees North: The ABCs of North Ghana

2013 ◽  
Vol 2 (4) ◽  
Author(s):  
Nicole Dalmer
Keyword(s):  
Red Deer ◽  
Public Libraries ◽  
Farm Animals ◽  
Northern Ghana ◽  
School Students ◽  
University Of Alberta ◽  
Northern Regions ◽  
The University ◽  
Made In

Tools for Schools Africa Foundation. 9 Degrees North: The ABCs of North Ghana. Red Deer, Alberta: Tools for Schools Africa Foundation, 2011. Print. Since 2003, Tools for Schools Africa Foundation has been working to increase educational opportunities in northern Ghana. A registered charity based out of Red Deer, Alberta, they have been working to advance the quality of life of those living in the northern regions of Ghana by improving access to post-primary education. One of their recent projects includes the publication of an ABC book for primary school students. 9 Degrees North: The ABCs of North Ghana is an amazing piece of beautiful artistry; each letter colourfully depicting animals, activities, plants, traditions, history and other aspects of Ghanaian life. Each of the 26 letters is illustrated by a different artist, allowing readers to be introduced to a variety of artistic mediums, including oils, pastels, watercolours and pencil. The artistry from letter to letter is unique, featuring different uses of colour and technique, yet each image is consistently impressive. The accessible and well-written sentences that accompany each illustration introduce readers to Bolga baskets (grass baskets made in Bolgatanga), Kapok trees (used by people and farm animals for its shade), Oware (the national game of Ghana), and the Black Volta River (full of crocodiles) amongst many other interesting facts and features about this country. In addition to the few sentences used to explain the illustrations associated with each of the 26 letters, there is a detailed appendix with additional facts about the object or focus of each letter which could serve as a useful teaching tool for using this book in the classroom. The appendix also includes several additional photographs and paintings of Ghana. 9 Degrees North: The ABCs of North Ghana is highly recommended for elementary school libraries as well as public libraries. With its varied and vibrant illustrations, and with proceeds from the sale of this book supporting scholarships for girls in northern Ghana, this will also make an excellent addition to any reader’s collection. Highly recommended: 4 out of 4 stars Reviewer: Nicole Dalmer Nicole Dalmer is a Public Services Librarian at H.T. Coutts Education & Physical Education Library at the University of Alberta. She is interested in health literacy, pinball, and finding the perfect cup of coffee to accompany a good read.

Memoirs: The Alimentary Canal and Pro-epithelial Regeneration in Coccinella septempunctata with a comparison of Carnivorous and Herbivorous Coccinellids

1939 ◽  
Vol s2-81 (323) ◽  
pp. 451-478
Author(s):  
S. PRADHAN
Keyword(s):  
Alimentary Canal ◽  
Coccinella Septempunctata ◽  
The Other ◽  
Detailed Account ◽  
Nerve Supply ◽  
Epithelial Regeneration ◽  
Gut Epithelium

The paper incorporates: 1. The anatomy of the alimentary canal of Coccinella septempunctata as a type of carnivorous Coccinellid. 2. A detailed account of the extrinsic musculature and the nerve-supply of the cephallic stomodaeum, which have been studied in very few insects and never in Coccinellids. 3. The histology of the alimentary canal, specially the midgut, distinguishing four definite types of epithelium, one of which is surprisingly peculiar and has not been described before. This type of epithelium shows apparently two layers of cells, one superimposed over the other, the outer having large, regularly arranged, intercellular vacuoles as have not been described before, at least in the gut of insects. 4. A discussion on the relations of the four types of epithelium to one another, recognizing that this peculiar type of epithelium is just a phase in a unique process of Pro-epithelial Regeneration in the mid-gut epithelium. 5. A comparison of the chief characteristics of the alimentary canal of carnivorous and herbivorous Coccinellids based on the study of seven species of lady-bird beetles. 6. Probable explanations of the differences between the alimentary canals of the carnivorous and herbivorous Coccinellids.

Tâches, interaction et présence à distance

2021 ◽  
pp. 65-74
Author(s):  
Christelle HOPPE
Keyword(s):  
International Students ◽  
Learning Experience ◽  
The Other ◽  
Health Crisis ◽  
Pedagogical Choices ◽  
The One ◽  
Teaching Learning ◽  
The University ◽  
Made In

This article presents the highlights of the learning experience within the teaching-learning scheme of French as an additional language as it was proposed to international students at the university to ensure pedagogical continuity during the health crisis between April and June 2020. Through vignettes that give an overview of the course, it proposes, on the one hand, to reflect on the pedagogical choices that were made in order to measure their effects effectively. On the other hand, it looks at the role of the tasks and the way in which they stimulate interaction, articulate or organise the cognitive, conative and socio-affective presence at a distance in this particular context. What emerges from the experience is that the flexible articulation of a set of tasks creates an organising framework that helps learners to shape their own curriculum while supporting their engagement. Overall, the pedagogical organisation of the device has led to potentially beneficial creative and socio-interactive use.

scholarly journals The design of a practical high-speed computing machine. The EDSAC

1948 ◽  
Vol 195 (1042) ◽  
pp. 274-279 ◽  
Keyword(s):  
High Speed ◽  
Relaxation Methods ◽  
Mathematical Equations ◽  
Mathematical Laboratory ◽  
Fundamental Equations ◽  
Physical Laws ◽  
The University ◽  
Computing Machines ◽  
Conventional Type ◽  
Made In

I would like to give a description of the high-speed electronic digital calculating machine now in an advanced stage of construction in the University Mathematical Laboratory, Cambridge, and known as the EDSAC (Electronic Delay Storage Automatic Calculator). Before doing this I will set forth some of the considerations underlying its design. It will be realized that the potential power of electronic digital computing machines is very great, and that they are likely to have a far-reaching effect on certain fields of scientific research. It is, for example, often possible to write down the mathematical equations governing a situation but not possible to treat them analytically. If any progress is to be made in these cases it must be by a direct numerical attack on the fundamental equations. There have in recent years been a number of examples of this method. I might mention Professor Hartree’s work on self-consistent fields and Professor Southwell’s relaxation methods. In both cases the equations expressing the physical laws appropriate to the problem are written down and an approximate numerical solution sought without any intervening analysis of the conventional type. This kind of method is in principle of wide application and power, and the reason why it has not been more generally applied is that the labour of carrying out the necessary numerical processes is too great

scholarly journals Measurement Uncertainty and Conformity Assessment in Analytical Measurement—Considerations for the University Curriculum

Proceedings ◽  
2020 ◽  
Vol 55 (1) ◽  
pp. 17
Author(s):  
Stephen L. R. Ellison
Keyword(s):  
Measurement Uncertainty ◽  
Conformity Assessment ◽  
Analytical Measurement ◽  
University Curriculum ◽  
Analytical Measurements ◽  
The University ◽  
Made In

Many analytical measurements are made in order to check a system or product for conformity [...]

Foucault in Hamburg. Notes on a One-Year Stay, 1959–60

2020 ◽  
pp. 026327642095045
Author(s):  
Rainer Nicolaysen
Keyword(s):  
Michel Foucault ◽  
Red Light ◽  
Point Of View ◽  
Detailed Account ◽  
Guest Lecturer ◽  
One Year ◽  
The University ◽  
Red Light District ◽  
Made In

This article provides a detailed account of the year that Michel Foucault spent as Director of the Institut Français in Hamburg and as a guest lecturer at the Romance Studies Department at the University of Hamburg. It discusses the beginning of Foucault’s time in Hamburg, the courses he taught at these two institutions, his interactions with German students in his classes, and events with invited guests from the French intellectual sphere. But it also sheds light on the friendships he made in Hamburg, in particular with Rolf Italiaander; the completion of his own projects including Histoire de la folie and the translation of Kant’s Anthropology from a Pragmatic Point of View; and finally his nocturnal wanderings through Hamburg’s red light district, Sankt-Pauli.

Third Annual Report from the American Committee for Irish Studies, 1969-70

1970 ◽  
Vol 17 (66) ◽  
pp. 271-272
Author(s):  
Joseph M. Curran
Keyword(s):  
Northern Ireland ◽  
Executive Committee ◽  
Business Meeting ◽  
Annual Conference ◽  
University Of Kansas ◽  
Irish Studies ◽  
Personal Bias ◽  
The Republic ◽  
The University ◽  
Made In

The eighth annual conference of the American Committee for Irish Studies was held at Southern Illinois University, Carbondale, Illinois, from 30 April to 2 May 1970, with Professor Thomas Kinsella supervising local arrangements. The theme of the conference was ‘The roots of Ulster’, and representatives from both the Republic and Northern Ireland, as well as regular members of ACIS attended (Appendix A). At the business meeting Professor Harold Orel, of the University of Kansas, officially succeeded Professor John Kelleher of Harvard University as chairman of the executive committee, while Professor Maurice Harmon, of University College, Dublin, was named Irish representative on the executive committee. The business meeting also made the decision to accept the bid of the College of William and Mary for the 1971 conference. Professor J. C. Beckett, of Queen’s University, Belfast, delivered the banquet address. He spoke of the need for scholarly detachment and integrity on the part of the historian, who must strive to overcome personal bias and ‘represent times past as they were indeed’ Professor Beckett made a plea for more ‘popular history’, solidly grounded on historical evidence, but written in such a way that people will read it for pleasure as well as instruction. He explained the efforts being made in Northern Ireland to promote and popularize Irish studies, giving special emphasis to Queen’s University’s Institute of Irish Studies, which was attempting to coordinate work in the various fields of Irish studies.

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