First results using a new technology for measuring masses of very short-lived nuclides with very high accuracy: The MISTRAL program at ISOLDE

Albeit widely established in plastic and metal industry, additive manufacturing technologies are still a rare sight in the field of ceramic manufacturing. This is mainly due to the requirements for high performance ceramic parts, which no additive manufacturing process was able to meet to date.The Lithography-based Ceramic Manufacturing (LCM)-technology which enables the production of dense and precise ceramic parts by using a photocurable ceramic suspension that is hardened via a photolithographic process. This new technology not only provides very high accuracy, it also reaches high densities for the sintered parts. In the case of alumina a relative density of over 99.4 % and a 4-point-bending strength of almost 430 MPa were realized. Thus, the achievable properties are similar to conventional manufacturing methods, making the LCM-technology an interesting complement for the ceramic industry.

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Towards 1 ms−1 RV Accuracy

Symposium - International Astronomical Union ◽

10.1017/s0074180900217609 ◽

2004 ◽

Vol 202 ◽

pp. 103-105 ◽

Cited By ~ 1

Author(s):

F. Pepe ◽

M. Mayor ◽

D. Queloz ◽

S. Udry

Keyword(s):

Radial Velocity ◽

High Performance ◽

High Accuracy ◽

Error Sources ◽

Doppler Technique ◽

First Results ◽

Orbital Periods ◽

Very High ◽

Parent Star

Since the discovery of 51 Peg by Mayor & Queloz (1995) about 50 extra-solar planets have been discovered by means of the Doppler technique, and much more will follow. In future the goal will be to detect even lighter planets and/or planets with longer orbital periods, which may induce changes of only few m/s on the radial velocity of their parent star. Therefore very high performance instruments will be required. In view of the realization of HARPS (Pepe et al. 2000), the high-accuracy RV spectrograph for the ESO 3.6-m telescope dedicated to extra-solar planet search, we are investigating the accuracy limits and possible error sources. First results are presented in this paper.

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Effects and Risks of Distance Learning in Higher Education

Administrative Consulting ◽

10.22394/1726-1139-2020-10-61-73 ◽

2020 ◽

pp. 61-73

Author(s):

Yu. M. Tsygalov

Keyword(s):

Higher Education ◽

Distance Learning ◽

Online Education ◽

New Technology ◽

Negative Consequences ◽

Higher Education System ◽

First Results ◽

Spread Of Infection ◽

The Cost

The forced work of Russian universities remotely in the context of the pandemic (COVID-19) has generated a lot of discussion about the benefits of the new form of education. The first results were summed up and reports were presented, the materials of which showed that the main goal of online education — the prevention of the spread of infection, - has been achieved. Against this background, proposals and publications have appeared substantiating the effectiveness of the massive introduction of distance learning in Russia, including in higher education. However, the assessment of such training by the population and students in publications and in social networks was predominantly negative and showed that the number of emerging problems exceeds the possible benefits of the new educational technology. Based on the analysis of the materials of publications and personal experience of teaching online, the potential benefits and problems of distance learning in higher education in Russia are considered. It is proposed to consider the effects separately for the suppliers of new technology (government, universities) and consumers (students, teachers, society). It is substantiated that the massive introduction of online education allows not only to reduce the negative consequences of epidemics, but also to reduce budgetary funding for universities, optimize the age composition of teachers, and reduce the cost of maintaining educational buildings. However, there will be a leveling / averaging of the quality of education, and responsibility for the quality of training will shift from the state/universities to students. The critical shortcomings of online education are the low degree of readiness of the digital infrastructure, the lack of a mechanism for identifying and monitoring the work of students, information security problems, and the lack of trust in such training of the population. The massive use of online education creates a number of risks for the country, the most critical of which is the destruction of the higher education system and a drop in the effectiveness of personnel training. The consequences of this risk realization are not compensated by any possible budget savings.

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Stellar magnetic imaging from spectropolarimetric data

Symposium - International Astronomical Union ◽

10.1017/s0074180900083091 ◽

1996 ◽

Vol 176 ◽

pp. 53-60 ◽

Cited By ~ 1

Author(s):

J.-F. Donati

Keyword(s):

Small Amplitude ◽

High Accuracy ◽

Spectral Lines ◽

New Method ◽

Doppler Imaging ◽

Magnetic Imaging ◽

Active Stars ◽

Surface Fields ◽

Very High

In this paper, I will review the capabilities of magnetic imaging (also called Zeeman-Doppler imaging) to reconstruct spot distributions of surface fields from sets of rotationnally modulated Zeeman signatures in circularly polarised spectral lines. I will then outline a new method to measure small amplitude magnetic signals (typically 0.1% for cool active stars) with very high accuracy. Finally, I will present and comment new magnetic images reconstructed from data collected in 1993 December at the Anglo-Australian Telescope (AAT).

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Hole Accuracy during Deep Hole Drilling for Hydraulic Cylinder Application

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.984-985.67 ◽

2014 ◽

Vol 984-985 ◽

pp. 67-72 ◽

Cited By ~ 1

Author(s):

R. Clifford Benjamin Raj ◽

B. Anand Ronald ◽

A. Velayudham ◽

Prasmit Kumar Nayak

Keyword(s):

Feed Rate ◽

Drill Hole ◽

Hydraulic Cylinder ◽

High Accuracy ◽

Diameter Ratio ◽

Hole Drilling ◽

Deep Hole ◽

Deep Hole Drilling ◽

Very High ◽

Continuous Chip

Deep-hole drilling is a process in which the hole length will be very high when compared to diameter of the drill hole (i.e. length to diameter ratio will be greater than 5). Drilling a deep hole with very high accuracy is difficult process. The current project is about the production of deep hole with the aim to produce a chip which is not a continuous chip and also not a powdery chip. These conditions can be attained by varying the spindle speed and the tool feed rate.

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Cost Effective Swath Bathymetry

Marine Technology Society Journal ◽

10.4031/002533201788057982 ◽

2001 ◽

Vol 35 (4) ◽

pp. 33-45 ◽

Cited By ~ 3

Author(s):

Peter Hogarth

Keyword(s):

Processing Time ◽

Cost Effective ◽

High Accuracy ◽

High Coverage ◽

Swath Bathymetry ◽

World Survey ◽

Set Up ◽

Very High ◽

Harbor Area ◽

Wide Swath

Between 23rd and 25th July 2001 GeoSwath, a high specification shallow water wide swath bathymetry system, was used to survey the entire Portsmouth NH Harbor area. This paper deals with the results of this survey, illustrating the potential for significant reductions in the high costs, which have prevented widespread proliferation of Swath Bathymetry systems to date. Data, including a complete DTM gridded to 1 m resolution, will be presented and discussed in detail. These results show that the system is very easy to set up and use, requires greatly reduced boat and processing time, whilst offering high accuracy and very high coverage and resolution when used in a real-world survey of a dynamic harbor environment.

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M1212 Celiac Disease Serology with Very High Accuracy May Obviate Diagnostic Intestinal Biopsy in Different Clinical Scenarios

Gastroenterology ◽

10.1016/s0016-5085(08)61687-x ◽

2008 ◽

Vol 134 (4) ◽

pp. A-362

Author(s):

Emilia Sugai ◽

María Laura Moreno ◽

Hui Jer Hwang ◽

Adriana Crivelli ◽

Fabio Nachman ◽

...

Keyword(s):

Celiac Disease ◽

High Accuracy ◽

Intestinal Biopsy ◽

Clinical Scenarios ◽

Very High

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A high accuracy linear rate meter

Journal of Applied Physiology ◽

10.1152/jappl.1975.39.2.327 ◽

1975 ◽

Vol 39 (2) ◽

pp. 327-330

Author(s):

C. R. Wyss

Keyword(s):

Circuit Design ◽

Digital Circuits ◽

Analog Computer ◽

High Accuracy ◽

Digital Display ◽

Instantaneous Rate ◽

Linear Rate ◽

Very High ◽

Design Techniques

By implementing analog computer techniques using digital circuits, an instantaneous rate meter was built with approximately 100 times the accuracy of commercially available rate meters. The circuit is accurate to within +/- 0.2 events/min over a range of rates of 0.2–900 epm. Modifications can be made to provide a digital display of rate. The circuit design techniques used in developing the rate meter may be used to generate a wide variety of functions of time with very high accuracy.

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Discrete differential operators for periodic and two-periodic time functions

COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ◽

10.1108/compel-03-2018-0123 ◽

2019 ◽

Vol 38 (1) ◽

pp. 325-347 ◽

Cited By ~ 2

Author(s):

Tadeusz Sobczyk ◽

Michał Radzik ◽

Natalia Radwan-Pragłowska

Keyword(s):

Differential Operators ◽

High Accuracy ◽

Large Set ◽

Periodic Functions ◽

Content Type ◽

Second Derivatives ◽

Non Linear ◽

Discrete Operators ◽

Linear Differential ◽

Very High

Purpose To identify the properties of novel discrete differential operators of the first- and the second-order for periodic and two-periodic time functions. Design/methodology/approach The development of relations between the values of first and second derivatives of periodic and two-periodic functions, as well as the values of the functions themselves for a set of time instants. Numerical tests of discrete operators for selected periodic and two-periodic functions. Findings Novel discrete differential operators for periodic and two-periodic time functions determining their first and the second derivatives at very high accuracy basing on relatively low number of points per highest harmonic. Research limitations/implications Reduce the complexity of creation difference equations for ordinary non-linear differential equations used to find periodic or two-periodic solutions, when they exist. Practical implications Application to steady-state analysis of non-linear dynamic systems for solutions predicted as periodic or two-periodic in time. Originality/value Identify novel discrete differential operators for periodic and two-periodic time functions engaging a large set of time instants that determine the first and second derivatives with very high accuracy.

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Successes and Predictions of A Pseudopotential Approach in Anion-Mixed Nitrides

MRS Proceedings ◽

10.1557/proc-692-h1.3.1 ◽

2001 ◽

Vol 692 ◽

Author(s):

L. Bellaiche ◽

A. Al-Yacoub ◽

N. A. Modine ◽

E. D. Jones

Keyword(s):

Solid Solutions ◽

Complex Anion ◽

High Accuracy ◽

Nitride Alloys ◽

Pseudopotential Approach ◽

Strain Dependent ◽

Very High

AbstractThe construction and the parameters of a new-strain dependent empirical pseudopotentials method are described and provided, respectively. This method is shown to reproduce with a very high accuracy some observed unusual properties in various complex anion-mixed nitride alloys. This method is also used to predict and understand anomalous effects that remain to be experimentally discovered in Ga1−yInyAs1−xNx quaternaries and GaAs0.5−xP0.5−xN2x solid solutions.

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