scholarly journals Strategies to modulate zebrafish collective dynamics with a closed-loop biomimetic robotic system

2019 ◽  
Author(s):  
Yohann Chemtob ◽  
Leo Cazenille ◽  
Frank Bonnet ◽  
Alexey Gribovskiy ◽  
Francesco Mondada ◽  
...  
Keyword(s):  
Small Groups ◽  
Closed Loop ◽  
Robotic System ◽  
Past Work ◽  
The Third ◽  
Group Behaviour ◽  
Biomimetic Robots ◽  
Set Up ◽  
Social Behaviours ◽  
Behavioural Strategies

AbstractThe objective of this study is to integrate biomimetic robots into small groups of zebrafish and to modulate their collective behaviours. A possible approach is to have the robots behave like sheepdogs. In this case, the robots would behave like a different species than the fish and would present different relevant behaviours. In this study, we explore different strategies that use biomimetic zebrafish behaviours. In past work, we have shown that robots biomimicking zebrafish can be socially integrated into zebrafish groups. We have also shown that a fish-like robot can modulate the rotation choice of zebrafish groups in a circular set-up. Here, we further study the modulation capabilities of such robots in a more complex set-up. To do this, we exploit zebrafish social behaviours we identified in previous studies. We first modulate collective departure by replicating the leadership mechanisms with the robot in a set-up composed of two rooms connected by a corridor. Then, we test different behavioural strategies to drive the fish groups towards a predefined target room. To drive the biohybrid groups towards a predefined choice, they have to adopt some specific fish-like behaviours. The first strategy is based on a single robot using the initiation behaviour. In this case, the robot keeps trying to initiate a group transition towards the target room. The second strategy is based on two robots, one initiating and one staying in the target room as a social attractant. The third strategy is based on a single robot behaving like a zebrafish but staying in the target room as a social attractant. The fourth strategy uses two robots behaving like zebrafish but staying in the target room. We conclude that robots can modulate zebrafish group behaviour by adopting strategies based on existing fish behaviours. Under these conditions, robots enable the testing of hypotheses about the behaviours of fish.

Excavations at Fishbourne, 1963. Third Interim Report

1964 ◽  
Vol 44 (1) ◽  
pp. 1-8
Keyword(s):  
Interim Report ◽  
The West ◽  
Civic Society ◽  
North West ◽  
The Third ◽  
North East ◽  
The North ◽  
The Future ◽  
Set Up

Early in 1963 much of the land occupied by the Roman building at Fishbourne was purchased by Mr. I. D. Margary, M.A., F.S.A., and was given to the Sussex Archaeological Trust. The Fishbourne Committee of the trust was set up to administer the future of the site. The third season's excavation, carried out at the desire of this committee, was again organized by the Chichester Civic Society.1 About fifty volunteers a day were employed from 24th July to 3rd September. Excavation concentrated upon three main areas; the orchard south of the east wing excavated in 1962, the west end of the north wing, and the west wing. In addition, trial trenches were dug at the north-east and north-west extremities of the building and in the area to the north of the north wing. The work of supervision was carried out by Miss F. Pierce, M.A., Mr. B. Morley, Mr. A. B. Norton, B.A., and Mr. J. P. Wild, B.A. Photography was organized by Mr. D. B. Baker and Mrs. F. A. Cunliffe took charge of the pottery and finds.

Translator and translation research: general descriptions of concepts

2019 ◽  
Author(s):  
Darian Jancowicz-Pitel
Keyword(s):  
Quantitative Method ◽  
Point Of View ◽  
Translation Process ◽  
Translation Research ◽  
Qualitative And Quantitative ◽  
The Third ◽  
Part Time ◽  
Set Up ◽  
Translation Errors ◽  
Multiple Languages

The presented paper aimed for exploring the translation process, a translator or interpreter needs equipment or tools so that the objectives of a translation can be achieved. If an interpreter needs a pencil, paper, headphones, and a mic, then an interpreter needs even more tools. The tools required include conventional and modern tools. Meanwhile, the approach needed in research on translation is qualitative and quantitative, depending on the research objectives. If you want to find a correlation between a translator's translation experience with the quality or type of translation errors, a quantitative method is needed. Also, this method is very appropriate to be used in research in the scope of teaching translation, for example from the student's point of view, their level of intelligence regarding the quality or translation errors. While the next method is used if the research contains translation errors, procedures, etc., it is more appropriate to use qualitative methods. Seeing this fact, these part-time translators can switch to the third type of translator, namely free translators. This is because there is an awareness that they can live by translation. These translators set up their translation efforts that involve multiple languages.

The application of compound proportional resonant control strategy in multiple PV inverters system

2018 ◽  
Vol 32 (34n36) ◽  
pp. 1840098
Author(s):  
Yuan Li ◽  
Huifang Shen ◽  
Chao Xiong ◽  
Yaofei Han ◽  
Guofeng He
Keyword(s):  
Control Strategy ◽  
Closed Loop ◽  
Control Strategies ◽  
Integrated Control ◽  
Reference Signal ◽  
Loop Model ◽  
Harmonic Compensation ◽  
Feed Forward ◽  
Feed Forward Control ◽  
Set Up

In order to eliminate the effect on the grid current caused by the background harmonic voltage and the reference signal on the grid connected multi-inverter, this paper adopts the double closed-loop feed-forward control strategy. This strategy is based on the inductor voltage and the grid-connected current, and the integrated control strategy of quasi-proportional resonance loop parallel to a specific harmonic compensation loop. Based on the closed-loop model of multiple inverters, the change curves of the transfer function of the two control strategies are compared with the feed-forward control and the composite proportional resonance. The two corresponding control methods are used to analyze the current quality of the multi-inverter impact. Finally, the MATLAB/Simulink simulation model is set up to verify the proposed control strategies. The simulation results show that the proposed method can achieve better tracking of the sinusoidal command signal at the fundamental frequency, and enhance the anti-interference ability of the system at the 3rd, 5th, and 7th harmonic frequency.

From Seeker to Finder: A Study in Seventeenth-Century English Spiritualism Before The Quakers

1948 ◽  
Vol 17 (4) ◽  
pp. 299-315 ◽  
Author(s):  
George Arthur Johnson
Keyword(s):  
Seventeenth Century ◽  
Civil Wars ◽  
Small Groups ◽  
Holy Spirit ◽  
British History ◽  
The Third ◽  
The Holy Spirit ◽  
Third Person ◽  
The Third Person ◽  
The Trinity

The period of the Civil Wars and Commonwealth in England was one of the most momentous epochs in British history. For small groups of people the decade of the 1640's inaugurated a New Age—an age in which the Holy Spirit reigned triumphant. Such believers reached the zenith of Puritan “spiritualism,” or that movement which placed the greatest emphasis upon the Third Person of the Trinity.

scholarly journals Epigraphic Squeezes: Digitisation, Publication, and Enhancement

2020 ◽  
Vol 65 (1) ◽  
pp. 5-16
Author(s):  
Eloisa Paganoni
Keyword(s):  
Relational Database ◽  
Web Application ◽  
Initial Phase ◽  
Current Phase ◽  
Methodological Issues ◽  
The Third ◽  
Research And Teaching ◽  
Database Architecture ◽  
Set Up ◽  
Greek Epigraphy

"Epigraphic squeezes are a key tool for research and teaching. They also have historical and documentary value. They are reliable copies of inscribed text and become the only evidence that remains if inscriptions are lost or destroyed. This paper describes the Venice Squeeze Project for the preservation and enhancement of epigraphic squeezes in the Department of Humanities at Ca’ Foscari University of Venice. For the initial phase of the project, the Ca’ Foscari University collection of epigraphic squeezes was published in the digital ektypotheke E-stampages. The current phase involves developing a web application to digitise epigraphic squeezes according to the metadata architecture of E-stampages. The first part of this paper describes the background of the Venice Squeeze Project and methodological issues, which fostered the partnership with E-stampages. The second part describes the relational database that was set up to digitise the Ca’ Foscari collection. The third part introduces the project initiatives to promote a network of Italian institutions interested in digitizing their collections of epigraphic squeezes. Keywords: Greek epigraphy, squeezes, database architecture"

scholarly journals The Third AUTP Conference on ‘Teaching Psychodynamic Psychotherapy’

1986 ◽  
Vol 10 (9) ◽  
pp. 241-242
Author(s):  
John Denford
Keyword(s):  
Small Groups ◽  
Psychodynamic Psychotherapy ◽  
Personal Quality ◽  
The Third ◽  
University College

As is often the case, Oxford was damp and cold, but this did not deter the more athletic of us from trotting round lovely Christchurch meadows, or the more aesthetic from visiting an exhibition of Impressionist drawings in the Bodleian. The unpretentious, even homely, character of University College helped to draw a quite disparate group of psychotherapists together. This in turn was reinforced by the personal quality of all the formal presentations, and by the repeated experiences of small groups whose composition is stable. They allow the development of some degree of relationship both personal and intellectual in the course of two days.

The Empirical Research for the Expansion of Chain into the Third and Fourth Tier Cities in Guangdong Province

2012 ◽  
Vol 433-440 ◽  
pp. 1967-1970
Author(s):  
Jun Chen ◽  
De Shan Tang
Keyword(s):  
Decision Making ◽  
Factor Analysis ◽  
Empirical Research ◽  
Power Index ◽  
Guangdong Province ◽  
County Level ◽  
Scientific Choice ◽  
Retail Chain ◽  
The Third ◽  
Set Up

The Retail Chain Enterprises implement the strategy of channel to sink to set up shops in third and fourth cities. A reasonable and scientific choice of order of priority must be made when the enterprises entering those cities. This article adopts the approach of the Factor Analysis and duster Analysis the analysis 72 cities (including county-level cities) according to purchasing power index, and to explore how Retail Chain Enterprises to make the market of third and fourth their cities in Guangdong province. The conclusion that is the order of decision ——making to enter into the third and fourth tier cities, which has important guiding significance.

Usage of Journal Rankings: An International Perspective

2017 ◽  
Vol 16 (3) ◽  
pp. 1-15 ◽  
Author(s):  
Ervin L. Black ◽  
Lesley Stainbank ◽  
Dan Elnathan ◽  
Begoña Giner ◽  
Sidney J. Gray ◽  
...  
Keyword(s):  
Small Groups ◽  
Task Force ◽  
International Perspective ◽  
Research Quality ◽  
Journal Ranking ◽  
Promotion And Tenure ◽  
Journal Rankings ◽  
Global Engagement ◽  
Faculty Research Productivity ◽  
Set Up

ABSTRACTEstablished by the Global Engagement Task Force, this committee was charged with examining the usage of journal rankings internationally. Through questionnaires, literature review, and discussions with various international accounting organizations we gain a better understanding of the uses and challenges of journal rankings. Journal rankings are used by governments, professional accounting bodies, university organizations, individual universities, schools, and departments to evaluate the quality and quantity of faculty research productivity. Rewards for journal publications differ around the world, but can range from promotion and tenure to monetary rewards. Publishing in a journal that is on a journal list does provide some weight or legitimacy to the publication and thereby assists in promoting the academic's career, yields monetary awards, or is in other ways beneficial to the academic. However, there is a danger in using a one-size-fits-all model. We caution strongly against using journal rankings to primarily assess the research quality of individuals or even small groups, because rankings are by design unsuited for this purpose. When journal rankings are used, they should be used in conjunction with other metrics. It is highly unlikely that a single solution with regard to the usage of journal ranking lists can be proposed. Rather, different accounting schools and/or departments need to set up their own guidelines as to how journal ranking lists can be used in decision making. The balance of the evidence suggests that journal ranking lists should be used with caution, and should not be used to assess individuals or small groups, or to assess research quality across disciplines.

Big Hopes and Trouble, 1961–1969

2021 ◽  
pp. 30-76
Author(s):  
Catriona Kelly
Keyword(s):  
Production Planning ◽  
Fiftieth Anniversary ◽  
The Other ◽  
October Revolution ◽  
Party Leader ◽  
Film Production ◽  
The Third ◽  
The Government ◽  
Set Up ◽  
General Director

In 1961, the government bodies responsible for film production (the Ministries of Culture of the USSR and RSFSR) forcibly imposed on a reluctant Lenfilm the complete reorganization of production planning. The old Scripts Department was shut down and three “creative units” set up. This change was pushed through by Lenfilm’s energetic and flamboyant new general director, Ilya Kiselev, who had begun his career as an actor. Of the creative units, the earliest to emerge was the Third Creative Unit, which soon had a role as the flagship of contemporary cinema, a genre heavily promoted during the Thaw. However, the Third Creative Unit ran into increasing trouble as political control tightened after Khrushchev was forced to resign, and in 1969, it was closed down altogether. Yet life was not always calmer in the other units, as witnessed in particular by the difficulties that gripped the Second Creative Unit’s efforts to produce movies commemorating the fiftieth anniversary of the October Revolution in 1967, and by the problems of the First Creative Unit in establishing its own character and repertoire. At the same time, the general political line at this period, while unpredictable, was not uniformly harsh, as manifested in the conclusion of Leningrad’s Party leader that audiences could “make up their own mind” about a film he disliked.

The Vigor of Confederacies

2021 ◽  
pp. 78-92
Author(s):  
Robin Waterfield
Keyword(s):  
Third Century ◽  
Ancient Greek ◽  
Federal States ◽  
Central Greece ◽  
The Third ◽  
Set Up ◽  
Almost All ◽  
Familiar Form

The chief way in which the Greeks united in the third century in order to be able to offer resistance to Macedon was by forming large federal states. The two greatest of these were based in Achaea and in Aetolia, but both quickly spread well beyond these ethnic borders. “Aetolia” came to mean almost all of central Greece, and “Achaea” much of the Peloponnese. I discuss the differences between confederacies and the most familiar form of ancient Greek polity, the polis, and show how confederacies gained their strengths, before focusing on the structures set up by the Aetolians and Achaeans. By the time Antigonus came to the Macedonian throne, the Achaeans were on the rise, but the Aetolians were already a powerful threat. They had spearheaded the Greek repulsion of the Celts from central Greece, thus preserving Delphi, the most important of the Greeks’ common religious centers, and they used this as a springboard for further expansion. Antigonus treated them warily throughout his reign.

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