scholarly journals Set Up and Testing of a Software Package for the Geodetic Analysis of VLBI Data +

1984 ◽  
Vol 110 ◽  
pp. 375-376
Author(s):  
A. Caporali ◽  
G. Sylos Labini
Keyword(s):  
Ad Hoc ◽  
Computational Effort ◽  
Input Output ◽  
Batch Mode ◽  
Time Interaction ◽  
Intrinsic Complexity ◽  
Vlbi Data ◽  
Set Up ◽  
The Moment ◽  
Graphic Program

The need for centimetric accuracies set by the application of the VLBI technique to geodesy implies a considerable computational effort, because of the intrinsic complexity of the model and because there is an increasingly large number of calibrations and corrections which can be accounted for only via software. The program VLBI 3 (Robertson, 1975) has been developed for the geodetic and astrometric analysis of VLBI data. It includes an accurate theoretical model of the observables and is supported by a number of routines for parameter fitting and input/output operations with data and results. The original VAX version of VLBI 3, due to N. Bartel and M.I. Ratner, runs in batch mode and requires routines which are in general unavailable in standard VAX systems. We have prepared (Caporali and Sylos Labini, 1982) a modified VAX version of VLBI 3. This version runs on our standard VAX/VMS computers and contains a number of changes in the FORTRAN source which allow to the user a real time interaction with the program. In addition, having a Tektronix graphic station at our disposal, we decided to replace the existing plot package - which used the line printer - with a “ad hoc” graphic program which permits interactive display of the results of each run of VLBI 3. Our work was mostly concerned with the input/output sections of VLBI 3. The theorical model of the VLBI observables has, for the moment, been left unchanged. We have, however, noticed that the theorical model could be updated and made more precise, e.g. in the computation of the nutation terms and of the aberration. This updating and a more extensive geodetic and astrometric analysis of VLBI data are planned to be done next.

The Revolutionizing of the Revolution

2017 ◽  
Author(s):  
R. R. Palmer
Keyword(s):  
French Revolution ◽  
Point Of View ◽  
Strict Sense ◽  
French Government ◽  
Thing In Itself ◽  
Set Up ◽  
The Moment ◽  
The French Revolution ◽  
The Revolution

In 1792, the French Revolution became a thing in itself, an uncontrollable force that might eventually spend itself but which no one could direct or guide. The governments set up in Paris in the following years all faced the problem of holding together against forces more revolutionary than themselves. This chapter distinguishes two such forces for analytical purposes. There was a popular upheaval, an upsurge from below, sans-culottisme, which occurred only in France. Second, there was the “international” revolutionary agitation, which was not international in any strict sense, but only concurrent within the boundaries of various states as then organized. From the French point of view these were the “foreign” revolutionaries or sympathizers. The most radical of the “foreign” revolutionaries were seldom more than advanced political democrats. Repeatedly, however, from 1792 to 1799, these two forces tended to converge into one force in opposition to the French government of the moment.

Using the Kalman Filtering for the Fault Detection and Isolation (FDI) in the Nonlinear Dynamic Processes

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Yahya Chetouani
Keyword(s):  
Fault Detection ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic System ◽  
Chemical Reactor ◽  
Fault Detection And Isolation ◽  
Decision Threshold ◽  
Normal Behaviour ◽  
Batch Mode ◽  
The Moment ◽  
Reactor Operating

This paper presents a Fault Detection and Isolation (FDI) method for stochastic nonlinear dynamic systems. First, the developed fault detection method is based on statistical information generated by the extended Kalman filter (EKF) and is intended to reveal any drift from the normal behaviour of the process. A fault of a chemical origin in a perfectly stirred batch chemical reactor, occurring at an unknown instant, is simulated. The purpose is to detect the presence of this abrupt change, and pinpoint the moment it occurred. It is also shown that the convergence of the EKF is accomplished more or less rapidly according to the nature of the noise generated by the measurement sensors. The state estimate is observed and discussed, as well as the time delay in detection according to the decision threshold. Then, this study shows another method of tackling the problem of the physical origin diagnosis of faults by combining the technique based on the standardized innovations and the technique using the multiple extended Kalman filters for a strongly non-stationary nonlinear dynamic system. The usefulness of this combination is the implementation of all the fault dynamics models if the decision threshold on the standardized innovation exceeds a determined threshold. In the other case, one EKF is enough to estimate all the process state. An algorithm is described and applied to a perfectly stirred chemical reactor operating in a semi-batch mode. The chemical reaction used is an exothermic second order one.

scholarly journals Assessing biases, relaxing moralism: On ground-truthing practices in machine learning design and application

2021 ◽  
Vol 8 (1) ◽  
pp. 205395172110135
Author(s):  
Florian Jaton
Keyword(s):  
Machine Learning ◽  
William James ◽  
A Priori ◽  
Learning Algorithms ◽  
Three Dimensional ◽  
Ground Truth ◽  
Machine Learning Algorithms ◽  
Ground Truthing ◽  
Set Up ◽  
The Moment

This theoretical paper considers the morality of machine learning algorithms and systems in the light of the biases that ground their correctness. It begins by presenting biases not as a priori negative entities but as contingent external referents—often gathered in benchmarked repositories called ground-truth datasets—that define what needs to be learned and allow for performance measures. I then argue that ground-truth datasets and their concomitant practices—that fundamentally involve establishing biases to enable learning procedures—can be described by their respective morality, here defined as the more or less accounted experience of hesitation when faced with what pragmatist philosopher William James called “genuine options”—that is, choices to be made in the heat of the moment that engage different possible futures. I then stress three constitutive dimensions of this pragmatist morality, as far as ground-truthing practices are concerned: (I) the definition of the problem to be solved (problematization), (II) the identification of the data to be collected and set up (databasing), and (III) the qualification of the targets to be learned (labeling). I finally suggest that this three-dimensional conceptual space can be used to map machine learning algorithmic projects in terms of the morality of their respective and constitutive ground-truthing practices. Such techno-moral graphs may, in turn, serve as equipment for greater governance of machine learning algorithms and systems.

Advancing the Agenda of the Confederation of Trade Unions on the Prevention of Sexual Violence in the World of Work in Indonesia

2021 ◽  
Vol 26 (1) ◽  
pp. 63
Author(s):  
Atnike Nova Sigiro
Keyword(s):  
Sexual Violence ◽  
Gender Equality ◽  
Trade Union ◽  
Trade Unions ◽  
Ad Hoc ◽  
Gender Based Violence ◽  
The World ◽  
Gender Based ◽  
And Gender ◽  
Set Up

<p>This article was formulated based on interviews with 5 (five) trade union confederations from a number of confederations in Indonesia, namely: Konfederasi Serikat Pekerja Nasional (KSPN), Konfederasi Sarikat Buruh Muslimin Indonesia (KSarbumusi), Konfederasi Serikat Buruh Seluruh Indonesia (KSBSI), Konfederasi Serikat Pekerja Indonesia (KSPI), and Konfederasi Kongres Aliansi Serikat Buruh Indonesia (KKASBI). This article seeks to explore the efforts made by the trade union confederation in promoting gender equality - specifically in advancing the agenda for the prevention and elimination of sexual violence in the world of work. This article was compiled based on research with a qualitative approach, with data collection methods through interviews and literature studies. The results of this study found that the confederations interviewed had already set up internal structures that have specific functions on issues related to gender equality, gender-based violence, and women’s empowerment; although still limited and on ad-hoc basis. This research also finds that the role of the trade union confederation is particularly prominent in advocating policies related to sexual violence and gender-based violence in the world of work, such as advocating the Bill on the Elimination of Sexual Violence, and the ratification of the ILO Convention No. 190 on Violence and Harassment.</p>

A COMPARISON BETWEEN ALUMINIUM AND IRON ELECTRODES IN ELECTROCOAGULATION PROCESS FOR GLYPHOSATE REMOVAL

2015 ◽  
Vol 77 (32) ◽  
Author(s):  
Rabiatuladawiyah Danial ◽  
Luqman Chuah Abdullah ◽  
Mohsen Nourouzi Mobarekeh ◽  
Shafreeza Sobri ◽  
Nordayana Mohd Adnan
Keyword(s):  
Charged Particles ◽  
Deionized Water ◽  
Water Production ◽  
Batch Mode ◽  
Initial Concentration ◽  
Iron Electrodes ◽  
Metal Plates ◽  
Aqueous Environments ◽  
Electrocoagulation Process ◽  
Set Up

This study was intended to compare the performance of electrocoagulation process using aluminium and iron electrodes for glyphosate removal in aqueous solution. The effects of initial glyphosate concentration, electrocoagulation time and distance between electrodes, were discussed in detail. An electrocoagulation tank of 500mL with two metal plates electrodes, same in dimensions and metal types, was set up to perform batch mode laboratory experiment and the glyphosate in white powder was first diluted with deionized water. Production of metal cations showed an ability to neutralize negatively charged particles, which then encouraged to bind together to form aggregates of flocs composed of a combination of glyphosate and metal hydroxide. Compared with iron electrodes, aluminium electrodes were more effective for glyphosate removal, with a removal efficiency of over than 80%. This study revealed that electrocoagulation process using aluminium electrodes is reliable, especially designed for initial concentration 100 mg/L, electrocoagulation time 50 min, and distance between electrodes 6 cm. Finally, it can be concluded that electrocoagulation process using aluminium electrodes is efficient for glyphosate removal from aqueous environments.

scholarly journals Fictive Deixis, Direct Discourse, and Viewpoint Networks

2021 ◽  
Vol 6 ◽  
Author(s):  
Barbara Dancygier
Keyword(s):  
Composite Structure ◽  
Ad Hoc ◽  
Conceptual Structure ◽  
Political Campaigns ◽  
Direct Discourse ◽  
Close Analysis ◽  
Mental Spaces ◽  
Set Up ◽  
Tight Correlation ◽  
Speech Situation

This paper proposes a renewed and more textured understanding of the relation between deixis and direct discourse, grounded in a broader range of genres and reflecting contemporary multimodal usage. I re-consider the phenomena covered by the concept of deixis in connection to the speech situation, and, by extension, to the category of Direct Discourse, in its various functions. I propose an understanding of Direct Discourse as a construction which is a correlate of Deictic Ground. Relying on Mental Spaces Theory and the apparatus it makes available for a close analysis of viewpoint networks, I analyze examples from a range of discourse genres - textual, visual and multimodal, such as literature, political campaigns, internet memes and storefront signs. These discourse contexts use Direct Discourse Constructions but usually lack a fully profiled Deictic Ground. I propose that in such cases the Deictic Ground is not a pre-existing conceptual structure, but rather is set up ad hoc to construe non-standard uses of Direct Discourse–I refer to such construals as Fictive Deictic Grounds. In that context, I propose a re-consideration of the concept of Direct Discourse, to explain its tight correlation with the concept of deixis. I also argue for a treatment of Deictic Ground as a composite structure, which may not be fully profiled in each case, while participating in the construction of viewpoint configurations.

scholarly journals Transient climate simulations of the deglaciation 21–9 thousand years before present; PMIP4 Core experiment design and boundary conditions

2015 ◽  
Vol 8 (10) ◽  
pp. 9045-9102 ◽  
Author(s):  
R. F. Ivanovic ◽  
L. J. Gregoire ◽  
M. Kageyama ◽  
D. M. Roche ◽  
P. J. Valdes ◽  
...  
Keyword(s):  
Working Group ◽  
Ad Hoc ◽  
Climate Models ◽  
Ice Sheet ◽  
Before Present ◽  
Last Deglaciation ◽  
Transient Simulations ◽  
The Last Deglaciation ◽  
Set Up ◽  
Core Simulation

Abstract. The last deglaciation, which marked the transition between the last glacial and present interglacial periods, was punctuated by a series of rapid (centennial and decadal) climate changes. Numerical climate models are useful for investigating mechanisms that underpin the events, especially now that some of the complex models can be run for multiple millennia. We have set up a Paleoclimate Modelling Intercomparison Project (PMIP) working group to coordinate efforts to run transient simulations of the last deglaciation, and to facilitate the dissemination of expertise between modellers and those engaged with reconstructing the climate of the last 21 thousand years. Here, we present the design of a coordinated Core simulation over the period 21–9 thousand years before present (ka) with time varying orbital forcing, greenhouse gases, ice sheets, and other geographical changes. A choice of two ice sheet reconstructions is given, but no ice sheet or iceberg meltwater should be prescribed in the Core simulation. Additional focussed simulations will also be coordinated on an ad-hoc basis by the working group, for example to investigate the effect of ice sheet and iceberg meltwater, and the uncertainty in other forcings. Some of these focussed simulations will focus on shorter durations around specific events to allow the more computationally expensive models to take part.

scholarly journals Torsion-shear behaviour at the interfaces of rigid interlocking blocks in masonry assemblages: experimental investigation and analytical approaches

2021 ◽  
Vol 54 (3) ◽  
Author(s):  
Claudia Casapulla ◽  
Elham Mousavian ◽  
Luca Argiento ◽  
Carla Ceraldi ◽  
Katalin Bagi
Keyword(s):  
Experimental Investigation ◽  
Ad Hoc ◽  
Pure Shear ◽  
Shear Capacity ◽  
Shear Behaviour ◽  
Main Body ◽  
Shear Failures ◽  
Set Up ◽  
External Forces ◽  
Analytical Approaches

AbstractIncreasing interest has recently been devoted to interlocking blocks/interfaces capable to enhance the sliding resistance of masonry joints to external forces. In this framework, this paper deals with the assessment of the torsion-shear capacity of the contact interface between the lock and the main body of an interlocking block, assumed to have a cohesive behaviour. The interlocking block is a rigid unit which, on its faces, have square cuboidal locks keeping the adjacent/overlapped blocks together and preventing blocks from sliding. Two numerical approaches and a novel ad hoc experimental investigation are proposed to simulate the torsion-shear behaviour by applying eccentrical shear forces to the lock. First, concave, convex and corrected concave formulations provided by the literature for assemblages of rigid blocks with conventional planar joints are extended to model the interlocking block behaviour. Then, according to a second approach based on the discrete element method, the concave-shaped interlocking block is modelled by convex polyhedrons representing the lock and the main body of the block, considered as individual rigid units stacked over each other with a cohesive contact in between. A novel experimental investigation on the limiting pure shear and torsion-shear combinations at the lock interface made of cohesive material is also presented. Two different mortars were chosen to make the specimens, which were casted using 3D printed moulds, and different test configurations were set up to simulate shear and torsion-shear failures. The analytical and numerical results are compared with each other and against the experimental ones, with interesting remarks on the application of the different approaches.

scholarly journals Le tribunal pénal international pour le Rwanda - La justice trahie (Note)

2005 ◽  
Vol 27 (4) ◽  
pp. 827-840
Author(s):  
John Philpot
Keyword(s):  
International Law ◽  
Ad Hoc ◽  
International Criminal ◽  
Military Intervention ◽  
International Criminal Tribunal ◽  
International Humanitarian Law ◽  
Humanitarian Law ◽  
Legal Requirements ◽  
Real Issue ◽  
Set Up

On November 8,1994, the Security Council of the United Nations adopted Resolution 955 creating an ad hoc international criminal tribunal to judge individuals responsible for violations of international humanitarian law committed in Rwanda between January 1, 1994 and December 31, 1994. In its form and structure, the Tribunal does not respect basic legal requirements required of a tribunal set up in international law. Us mandate - limited in time, in scope of potential indictment, and in jurisdiction to violations of international humanitarian law - mil prevent any light from being shed on the real issue raised by the Rwandan conflict, namely that of armed military intervention in Rwanda from Uganda. It will likely lead to the reinforcement of a one-sided view of the crisis in Rwanda and legitimate further unilateral interventionist policies in Africa and elsewhere. The Tribunal will institutionalize the de facto impunity for the members and supporters of the present government of Rwanda who undoubtedly committed many serious crimes between October 1, 1990 and the present.

From ‘Sustainability’ to ‘Competitive Industry’

2015 ◽  
Author(s):  
Gillian Doyle
Keyword(s):  
Film Industry ◽  
Competitive Industry ◽  
Key Players ◽  
Set Up ◽  
The Moment ◽  
Over Time ◽  
The Way

Although from the moment the Film Council was set up, it was clear that the intention was to found an organisation focused on bringing ‘sustainability’ to the British film industry, the Council gradually retreated from this term in favour of a wider set of priorities and the way in which it articulated its mission also gradually shifted. Drawing on a wealth of original interviews with senior politicians, film executives, independent producers, industry experts and leading filmmakers, this chapter examines the key players, forces and assumptions which drove the Film Council’s agenda, how the weighting of priorities shifted over time and why the Council’s sense of mission changed over its lifetime.

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