scholarly journals A Beta-Counting System Linked to a Personal Computer

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 767-772 ◽  
Author(s):  
Kunio Omoto
Keyword(s):  
Positive Result ◽  
Significant Role ◽  
Personal Computer ◽  
Radiocarbon Dating ◽  
Counting System ◽  
Long Period ◽  
Beta Counting ◽  
Correction Program ◽  
Fully Automatic ◽  
High Level

The automatic β-counting system plays a significant role in obtaining high-level reproducibility and reliability in conventional radiocarbon dating. I review here the results achieved by using the “Fully Automatic Radiocarbon Dating System” developed by Omoto (1982). Since setting up the system in 1981, I was able not only to save operator time in β counting, but also to obtain accurate dates with only minimal uncertainties. Another positive result was the introduction of the automatic voltage correction program, which produced excellent results for counting sample materials over a long period.

Rapid determination of Sr-89/Sr-90 in radwaste by low-level background beta counting system

1994 ◽  
Vol 45 (2) ◽  
pp. 251-256 ◽  
Author(s):  
Chu-Fang Wang ◽  
Jeng-Horng Lee ◽  
Horng-Jye Chiou
Keyword(s):  
Rapid Determination ◽  
Counting System ◽  
Low Level ◽  
Beta Counting

scholarly journals Fully Automatic Cell Segmentation with Fourier Descriptors

2021 ◽  
Author(s):  
Dominik Hirling ◽  
Peter Horvath
Keyword(s):  
Neural Networks ◽  
Convolutional Neural Networks ◽  
Fundamental Problem ◽  
Cell Segmentation ◽  
Fourier Descriptors ◽  
Control Points ◽  
Coefficient Vector ◽  
Fully Automatic ◽  
High Level ◽  
And Control

Cell segmentation is a fundamental problem in biology for which convolutional neural networks yield the best results nowadays. In this paper, we present HarmonicNet, a network, which is a modification of the popular StarDist and SplineDist architectures. While StarDist and SplineDist describe an object by the lengths of equiangular rays and control points respectively, our network utilizes Fourier descriptors, predicting a coefficient vector for every pixel on the image, which implicitly define the resulting segmentation. We evaluate our model on three different datasets, and show that Fourier descriptors can achieve a high level of accuracy with a small number of coefficients. HarmonicNet is also capable of accurately segmenting objects that are not star-shaped, a case where StarDist performs suboptimally according to our experiments.

scholarly journals Linguistic culture and politics in France

enadakultura ◽  
2021 ◽  
Author(s):  
Natalia Revishvili
Keyword(s):  
French Revolution ◽  
French Language ◽  
National Politics ◽  
The Public ◽  
French Academy ◽  
Long Period ◽  
The Status ◽  
Classical Language ◽  
High Level ◽  
Public Instruction

The rise of the French national politics was taking place simultaneously with the rise of the French power and territories in Europe. The first evidence of the emergence of the French language distinguished from Latin is the text of the ‘’French’’ version of the 842-nd Strasbourg Oath. France is an example of how ideas and myths about a language become ideologies and how it forms a part of a language policy, along with language planning and language practices.The French language was being established over a long period of time. From the 17th century onwards, increasing attention was paid to this issue. It is especially interesting to establish a high level of French spelling, the expression of good spelling in the French language has become an object of social values. On October 19 and 20, 1794, the Public Instruction Committee introduced a new project to teach French to all. French became the language of writing before it set foot in education.The 17-th and 18-th centuries became a period of legalization of the French language. The greatest philosophers and writers of this time legalized the French language in poetry and fiction. At the same time, it became the language of scientific writing. French gained the status of the most brilliant language in Europe over the last two centuries through the French Academy and the French Revolution. It was a new ‘’classical“ language.

scholarly journals MULTI-CHANNEL FRY COUNTER DESIGN USING OPTOCOUPLER SENSOR

2019 ◽  
Vol 4 (2) ◽  
pp. 97-104
Author(s):  
Lazuardi Umar ◽  
Yanuar Hamzah ◽  
Rahmondia N. Setiadi
Keyword(s):  
Counting Process ◽  
Production Capacity ◽  
High Accuracy ◽  
Limited Capacity ◽  
High Concentration ◽  
Counting System ◽  
Channel Detection ◽  
Accuracy Level ◽  
High Level ◽  
Almost All

This paper describes a design of a fry counter intended to be used by consuming fish farmer. Along this time, almost all the fry counting process is counted by manual, which is done by a human. It is requiring much energy and needs high concentration; thus, can cause a high level of exhaustion for the fry counting worker. Besides that, the human capability and capacity of counting are limited to a low level. A fry counter design in this study utilizes a multi-channel optocoupler sensor to increase the counting capacity. The multi-channel fry counter counting system is developed as a solution to a limited capacity of available fry counter. This design uses an input signal extender system on controller including the interrupt system. From the experiment, high accuracy level is obtained on the counting and channel detection, therefore, this design can be implemented and could help farmers to increase the production capacity of consuming fish.

Optimization of Robust Transonic Compressor Blades

2016 ◽  
Author(s):  
Marcus Lejon ◽  
Niklas Andersson ◽  
Tomas Grönstedt ◽  
Lars Ellbrant ◽  
Hans Mårtensson
Keyword(s):  
Surface Roughness ◽  
Service Use ◽  
Axial Compressor ◽  
Optimization Approach ◽  
Optimized Design ◽  
Compressor Stage ◽  
Compressor Blades ◽  
Transonic Compressor ◽  
Long Period ◽  
High Level

Surface degradation in an axial compressor during its lifetime can have a considerable adverse effect on its performance. The present study investigates how the optimized design of compressor blades in a single compressor stage is affected by considering a high level of surface roughness on a level representative of a long period of in-service use. It is shown that including surface roughness in the optimization process is of relatively little importance, however, matching of compressor stages is shown to require consideration as the rotational speed must be increased to reach the design point as surface quality decrease. An increased surface roughness in itself is shown to have a large effect on performance. Two optimization approaches are compared. The first approach considers the compressor blades to be hydraulically smooth. The designs obtained from this approach are subsequently degraded by increasing the level of surface roughness. The compressor blades from the first approach are compared to designs obtained from a second optimization approach, which considers a high level of surface roughness from the outset. The degraded compressor stages from the first approach are shown to be among the best performing designs in terms of polytropic efficiency and stability when compared to designs obtained with the second approach.

Indexing The Canadian Encyclopedia second edition

1988 ◽  
Vol 16 (2) ◽  
pp. 87-91
Author(s):  
Ron Gardner ◽  
Eve Gardner
Keyword(s):  
Personal Computer ◽  
Data Entry ◽  
Stanford University ◽  
High Quality ◽  
Fully Automatic ◽  
Ibm Pc

The index to the second edition of The Canadian Encyclopedia was prepared on an ibm pc-xt personal computer using the ibm Professional Editor, custom programs written in ibm Pascal, and TEX1 a high quality typesetting program developed by Donald E. Knuth of Stanford University in California. The entries were chosen and keyed in by the indexer, and then alphabetized, formatted, and typeset by the computer. An unusual data entry format together with good typesetting software made possible the delivery to the printer of the 372 page camera ready index less than two weeks after the indexer received the final pages of text. TEX (which rhymes with ‘blecchhh’ not the letter ‘X’) provides fully automatic pagination.

Violence and BRICS

2020 ◽  
pp. 683-712
Author(s):  
Lucy McMahon
Keyword(s):  
Economic Growth ◽  
Violence Prevention ◽  
Significant Role ◽  
Millennium Development Goals ◽  
Brics Countries ◽  
Development Agenda ◽  
Development Goals ◽  
High Level

After criticism that the Millennium Development Goals overlooked violence, the fourth of the twelve goals proposed by the High Level Panel on the Post 2015 Development Agenda was to ‘build peace’. Despite the vague understanding of what ‘peace’ would actually mean within this agenda, the argument laid out is clear: the only types of violence prevention that have a significant role in the post-2015 agenda are those that are also instrumental to economic growth. This chapter explores the place of violence in the development stories of the BRICS countries. I highlight the kinds of violence that appear to be essential in order for current patterns of economic growth to continue.

scholarly journals Gamma Flux in 14C Laboratories

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 428-430 ◽  
Author(s):  
Páll Theodórsson ◽  
Lauri Kaihola ◽  
H. H. Loosli ◽  
José M. Rodríguez
Keyword(s):  
Gamma Radiation ◽  
Radiocarbon Dating ◽  
Radiation Flux ◽  
Cosmic Ray ◽  
Cosmogenic Nuclides ◽  
Collaborative Group ◽  
Counting System ◽  
Γ Radiation ◽  
Gamma Flux ◽  
Anticoincidence Counting

An informal collaborative group of radiocarbon dating laboratories, the Low-Level Club, has been established to measure the gamma radiation flux and to test the efficiency of the anticoincidence counting system in laboratories with a NaI detector unit. The detector will record gamma radiation from cosmogenic nuclides, muons and secondary γ radiation formed in the passive shield by charged cosmic-ray particles. We present here the first phase of this work.

scholarly journals William Thomas Tutte. 14 May 1917 — 2 May 2002

2012 ◽  
Vol 58 ◽  
pp. 283-297 ◽  
Author(s):  
D. H. Younger
Keyword(s):  
Significant Role ◽  
Master's Degree ◽  
Trinity College ◽  
University Of Toronto ◽  
Master’S Degree ◽  
High Level ◽  
The University

William Tutte, born in Newmarket, completed a master’s degree in chemistry at Cambridge at the end of 1940, whereupon he was recruited to work at Bletchley Park as a cryptographer. He became the primary person responsible for breaking the Fish code used for high-level Army communication. After the war he returned to Cambridge as a Fellow of Trinity College, for three years of study for a PhD in mathematics. On completing his degree in 1948, he joined the Faculty of the University of Toronto, where he rose to pre-eminence in combinatorics. In 1962 he moved to the University of Waterloo, where he had a significant role in the development of the university and its Faculty of Mathematics.

Chemical Isotope Dilution for 14C Ams and the Potential for GC/AMS

Radiocarbon ◽  
1986 ◽  
Vol 28 (3) ◽  
pp. 1065-1067 ◽  
Author(s):  
Richard Gillespie
Keyword(s):  
Radiocarbon Dating ◽  
Minimum Sample Size ◽  
Dilution Ratio ◽  
Combustion Gas ◽  
Ams Radiocarbon Dating ◽  
Beta Counting ◽  
Careful Measurement ◽  
Environmental Work ◽  
Sample Dilution ◽  
Gas Pressures

The advent of accelerator-based mass spectrometry (AMS) radiocarbon dating has reduced the minimum sample size required to ca 1 mg from the 1 g of traditional beta counting techniques (cf Wölfli, Polach & Andersen, 1984). However, it is clear that even smaller samples will be necessary for some fields of endeavor, particularly environmental work where the absolute quantities are small, perhaps of the order of a few micrograms (Currie et al, 1985). This raises serious problems in the handling and measurement of such small amounts, so that dilution will sometimes be required. Normally, sample dilution is accomplished by adding “dead” CO2 to the combusted sample CO2, which requires very careful measurement of two gas pressures for the calculation of a dilution ratio. By forming a chemical derivative of a sample before combustion, gas pressure measurement is not necessary and an exact dilution ratio can be selected by judicous choice of the dilution reagent. This paper demonstrates that such a technique is possible for the AMS 14C dating of derivatized amino acids.

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