Structure transforming for constructing constraint force field in musculoskeletal robot

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shanlin Zhong ◽  
Ziyu Chen ◽  
Junjie Zhou
Keyword(s):  
Force Field ◽  
High Precision ◽  
Information Science ◽  
Noise Robustness ◽  
Constraint Force ◽  
Content Type ◽  
Musculoskeletal Robot ◽  
Limited Sensing ◽  
Novel Concept ◽  
And Control

Purpose Human-like musculoskeletal robots can fulfill flexible movement and manipulation with the help of multi joints and actuators. However, in general, sophisticated structures, accurate sensors and well-designed control are all necessary for a musculoskeletal robot to achieve high-precision movement. How to realize the reliable and accurate movement of the robot under the condition of limited sensing and control accuracy is still a bottleneck problem. This paper aims to improve the movement performance of musculoskeletal system by bio-inspired method. Design/methodology/approach Inspired by two kinds of natural constraints, the convergent force field found in neuroscience and attractive region in the environment found in information science, the authors proposed a structure transforming optimization algorithm for constructing constraint force field in musculoskeletal robots. Due to the characteristics of rigid-flexible coupling and variable structures, a constraint force field can be constructed in the task space of the musculoskeletal robot by optimizing the arrangement of muscles. Findings With the help of the constraint force field, the robot can complete precise and robust movement with constant control signals, which brings in the possibility to reduce the requirement of sensing feedback during the motion control of the robot. Experiments are conducted on a musculoskeletal model to evaluate the performance of the proposed method in movement accuracy, noise robustness and structure sensitivity. Originality/value A novel concept, constraint force field, is proposed to realize high-precision movements of musculoskeletal robots. It provides a new theoretical basis for improving the performance of robotic manipulation such as assembly and grasping under the condition that the accuracy of control and sensory are limited.

Parameter Normalization in Multibody Dynamics

2008 ◽  
Author(s):  
Saeed Ebrahimi ◽  
Jo´zsef Ko¨vecses
Keyword(s):  
Parameter Estimation ◽  
Multibody Dynamics ◽  
Eigenvalue Problems ◽  
Physical Structure ◽  
Control Problems ◽  
Inertial Parameters ◽  
Parametric Studies ◽  
Novel Concept ◽  
And Control

In this paper, we introduce a novel concept for parametric studies in multibody dynamics. This is based on a technique that makes it possible to perform a natural normalization of the dynamics in terms of inertial parameters. This normalization technique rises out from the underlying physical structure of the system, which is mathematically expressed in the form of eigenvalue problems. It leads to the introduction of the concept of dimensionless inertial parameters. This, in turn, makes the decomposition of the array of parameters possible for studying design and control problems where parameter estimation and sensitivity is of importance.

Resource-sharing through an inter-institutional repository

2015 ◽  
Vol 33 (4) ◽  
pp. 730-748 ◽  
Author(s):  
A Abrizah ◽  
Mohd Hilmi ◽  
Norliya Ahmad Kassim
Keyword(s):  
Resource Sharing ◽  
Information Science ◽  
Research Output ◽  
Academic Community ◽  
Open Access Publishing ◽  
Institutional Repository ◽  
Teaching Resources ◽  
Content Type ◽  
Institutional Repositories ◽  
Digital Repositories

Purpose – The purpose of this paper is to be concerned with the motivations and resistance among an institutional repository (IR) stakeholder – the Library and Information Science (LIS) academicians – with respect to Green Road open access publishing in an inter-institutional repository. Design/methodology/approach – The answers were identified from 47 LIS faculty from three library schools in Malaysia who reported awareness of what an IR is and having had experience in contributing resources to digital repositories. Data were collected using survey and interviews. Findings – The results highlighted the LIS faculty on their motivation to share their intellectual profile, research and teaching resources in an inter-institutional repositories and why the reluctance in contributing. The study reveals that the major motivation to share resources for those practicing self-archiving is related to performance expectancy, social influence, visible and authoritative advantage, career benefit and quality work. The major resistance to share scholarly research output through self-archiving in institutional repositories for those practicing self-archiving is concern on plagiarism, time and effort, technical infrastructure, lack of self-efficacy and insularity. Practical implications – Knowing what conditions predict motivation and resistance to contribute to IRs would allow IR administrators to ensure greater and more effective participation in resource-sharing among LIS academic community. If this resistance is addressed aptly, IRs can be of real benefit to their teaching, scholarship, collaborations, and publishing and to the community that they serve. Originality/value – The first study that has explored the ways LIS academics respond to a situation where knowledge sharing in academe has now been made mandatory through an IR and what makes them resist to do so.

scholarly journals The concept of neutrality: a new approach

2019 ◽  
Vol 76 (1) ◽  
pp. 333-353 ◽  
Author(s):  
Stephen Macdonald ◽  
Briony Birdi
Keyword(s):  
Literature Review ◽  
Design Methodology ◽  
Information Science ◽  
Social Institutions ◽  
Future Research ◽  
Library And Information Science ◽  
New Approach ◽  
Content Type ◽  
Normative Framework ◽  
Contextual Awareness

Purpose Neutrality is a much debated value in library and information science (LIS). The “neutrality debate” is characterised by opinionated discussions in contrasting contexts. The purpose of this paper is to fill a gap in the literature by bringing these conceptions together holistically, with potential to deepen understanding of LIS neutrality. Design/methodology/approach First, a literature review identified conceptions of neutrality reported in the LIS literature. Second, seven phenomenographic interviews with LIS professionals were conducted across three professional sectors. To maximise variation, each sector comprised at least one interview with a professional of five or fewer years’ experience and one with ten or more years’ experience. Third, conceptions from the literature and interviews were compared for similarities and disparities. Findings In four conceptions, each were found in the literature and interviews. In the literature, these were labelled: “favourable”, “tacit value”, “social institutions” and “value-laden profession”, whilst in interviews they were labelled: “core value”, “subservient”, “ambivalent”, and “hidden values”. The study’s main finding notes the “ambivalent” conception in interviews is not captured by a largely polarised literature, which oversimplifies neutrality’s complexity. To accommodate this complexity, it is suggested that future research should look to reconcile perceptions from either side of the “neutral non-neutral divide” through an inclusive normative framework. Originality/value This study’s value lies in its descriptive methodology, which brings LIS neutrality together in a holistic framework. This framework brings a contextual awareness to LIS neutrality lacking in previous research. This awareness has the potential to change the tone of the LIS neutrality debate.

Learning analytics: where information science and the learning sciences meet

2019 ◽  
Vol 120 (1/2) ◽  
pp. 59-73 ◽  
Author(s):  
Stephanie Danell Teasley
Keyword(s):  
Learning Analytics ◽  
Design Methodology ◽  
Significant Contribution ◽  
Information Science ◽  
Research Area ◽  
Learning Sciences ◽  
Digital Tools ◽  
Content Type ◽  
Working Together ◽  
Everyday Learning

Purpose The explosive growth in the number of digital tools utilized in everyday learning activities generates data at an unprecedented scale, providing exciting challenges that cross scholarly communities. This paper aims to provide an overview of learning analytics (LA) with the aim of helping members of the information and learning sciences communities understand how educational Big Data is relevant to their research agendas and how they can contribute to this growing new field. Design/methodology/approach Highlighting shared values and issues illustrates why LA is the perfect meeting ground for information and the learning sciences, and suggests how by working together effective LA tools can be designed to innovate education. Findings Analytics-driven performance dashboards are offered as a specific example of one research area where information and learning scientists can make a significant contribution to LA research. Recent reviews of existing dashboard studies point to a dearth of evaluation with regard to either theory or outcomes. Here, the relevant expertise from researchers in both the learning sciences and information science is offered as an important opportunity to improve the design and evaluation of student-facing dashboards. Originality/value This paper outlines important ties between three scholarly communities to illustrate how their combined research expertise is crucial to advancing how we understand learning and for developing LA-based interventions that meet the values that we all share.

Antecedents and consequences of replacing international independent intermediaries

2014 ◽  
Vol 26 (3) ◽  
pp. 218-237
Author(s):  
Erik B. Nes
Keyword(s):  
Longitudinal Design ◽  
Operation Mode ◽  
Content Type ◽  
Performance Variables ◽  
Direct Sales ◽  
Home Based ◽  
Process Theories ◽  
Antecedents And Consequences ◽  
Communication Control ◽  
And Control

Purpose – What characterizes the relationships with intermediaries that are soon to be replaced, and are the replacements successful? The paper aims to discuss these issues. Design/methodology/approach – The study applies a longitudinal design. The paper conducted a survey among a sample of exporters concerning their relationships with independent intermediaries in terms of trust, commitment, communication, control and two performance variables; financial performance and strategic goal achievement. Five years thereafter the author contacted the same companies again and questioned which independent intermediaries had been replaced in the period. The author then compared the replaced intermediaries with the extended intermediaries before they were replaced and analysed changes in the evaluations of the relationships and of the performance after the replacement. Findings – The relationships with terminated intermediaries that were replaced by sales subsidiary or home-based direct sales were characterized having higher trust, communication and control than extended relationships before replacement. While it may be surprising that these quite successful relationships were terminated, this is in line with internationalization process theories. The replacements, both intermediaries that were replaced by other intermediaries and by sales subsidiary/home-based direct sales, were highly successful in terms of improvement in performance and behavioural relationship variables. Research limitations/implications – The empirical findings are limited by the sample and by data collection from the principal only in the dyadic relations. Practical implications – International independent intermediaries should analyse the likelihood of being replaced by the principal because the relationship or the performance is unsatisfactory, but also because of satisfactory evaluations. Terminations of satisfactory relationships tend to be accompanied by change in operation mode to internal organization. The independent intermediary should in such cases build a defence structure against unwanted termination and/or prepare for buyout. The success of the replacements suggests that international marketers benefit from being proactive in replacing intermediaries with new intermediaries or with a hierarchal entry mode. Originality/value – This is the first study that applies most of these variables from interorganizational relations theory in the study of international independent intermediary replacements. It is also the first to give insight into the consequences of intermediary terminations.

scholarly journals Impact of Substratum Surface on Microbial Community Structure and Treatment Performance in Biological Aerated Filters

2013 ◽  
Vol 80 (1) ◽  
pp. 177-183 ◽  
Author(s):  
Lavane Kim ◽  
Eulyn Pagaling ◽  
Yi Y. Zuo ◽  
Tao Yan
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Bacterial Species ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Rrna Gene ◽  
Content Type ◽  
Property Change ◽  
And Control ◽  
Start Ups

ABSTRACTThe impact of substratum surface property change on biofilm community structure was investigated using laboratory biological aerated filter (BAF) reactors and molecular microbial community analysis. Two substratum surfaces that differed in surface properties were created via surface coating and used to develop biofilms in test (modified surface) and control (original surface) BAF reactors. Microbial community analysis by 16S rRNA gene-based PCR-denaturing gradient gel electrophoresis (DGGE) showed that the surface property change consistently resulted in distinct profiles of microbial populations during replicate reactor start-ups. Pyrosequencing of the bar-coded 16S rRNA gene amplicons surveyed more than 90% of the microbial diversity in the microbial communities and identified 72 unique bacterial species within 19 bacterial orders. Among the 19 orders of bacteria detected,BurkholderialesandRhodocyclalesof theBetaproteobacteriaclass were numerically dominant and accounted for 90.5 to 97.4% of the sequence reads, and their relative abundances in the test and control BAF reactors were different in consistent patterns during the two reactor start-ups. Three of the five dominant bacterial species also showed consistent relative abundance changes between the test and control BAF reactors. The different biofilm microbial communities led to different treatment efficiencies, with consistently higher total organic carbon (TOC) removal in the test reactor than in the control reactor. Further understanding of how surface properties affect biofilm microbial communities and functional performance would enable the rational design of new generations of substrata for the improvement of biofilm-based biological treatment processes.

Infodemic surrounding COVID-19: Can LIS students recognize and categorize “problematic information” types on social media?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shamima Yesmin ◽  
S.M. Zabed Ahmed
Keyword(s):  
Social Media ◽  
Online Survey ◽  
Information Science ◽  
Wrong Answer ◽  
Student Groups ◽  
Content Type ◽  
Correct Definition ◽  
Significant Difference ◽  
Definition Of ◽  
And Task

Purpose The purpose of this paper is to investigate Library and Information Science (LIS) students’ understanding of infodemic and related terminologies and their ability to categorize COVID-19-related problematic information types using examples from social media platforms. Design/methodology/approach The participants of this study were LIS students from a public-funded university located at the south coast of Bangladesh. An online survey was conducted which, in addition to demographic and study information, asked students to identify the correct definition of infodemic and related terminologies and to categorize the COVID-related problematic social media posts based on their inherent problem characteristics. The correct answer for each definition and task question was assigned a score of “1”, whereas the wrong answer was coded as “0”. The percentages of correctness score for total and each category of definition and task-specific questions were computed. The independent sample t-test and ANOVA were run to examine the differences in total and category-specific scores between student groups. Findings The findings revealed that students’ knowledge concerning the definition of infodemic and related terminologies and the categorization of COVID-19-related problematic social media posts was poor. There was no significant difference in correctness scores between student groups in terms of gender, age and study levels. Originality/value To the best of the authors’ knowledge, this is the first time an effort was made to understand LIS students’ recognition and classification of problematic information. The findings can assist LIS departments in revising and improving the existing information literacy curriculum for students.

Moving the needle: can training alter officer perceptions and use of de-escalation?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Michael D. White ◽  
Victor J. Mora ◽  
Carlena Orosco ◽  
E. C. Hedberg
Keyword(s):  
Controlled Trial ◽  
Police Department ◽  
Content Type ◽  
Officer Safety ◽  
Frequent Use ◽  
Before And After ◽  
June July ◽  
Officer Attitudes ◽  
Excessive Use Of Force ◽  
And Control

PurposeDe-escalation training for police has received widespread attention as a method for reducing unnecessary and excessive use of force. There is virtually no research on de-escalation, and as a result, there is little understanding about what it is, what it includes and whether it is effective. The current study compares attitudes about the importance and use of de-escalation among officers who were randomly assigned to participate (or not) in de-escalation training.Design/methodology/approachThe current study draws from a larger randomized controlled trial of de-escalation training in the Tempe, Arizona Police Department (TPD). Approximately 100 officers completed a survey in June–July 2019 and again in June–July 2020. TPD delivered the de-escalation training to half the patrol force in February–March 2020. The authors compare treatment and control officers' attitudes about the importance of specific de-escalation tactics, how often they use those tactics and their sentiments de-escalation training. The authors employ an econometric random-effects model to examine between-group differences post-training while controlling for relevant officer attributes including age, race, sex, prior training and squad-level pretraining attitudes about de-escalation.FindingsTreatment and control officers reported positive perceptions of de-escalation tactics, frequent use of those tactics and favorable attitudes toward de-escalation before and after the training. After receiving the training, treatment officers placed greater importance on compromise, and reported more frequent use of several important tactics including compromise, knowing when to walk away and maintaining officer safety.Originality/valueOnly a few prior studies have has examined whether de-escalation training changes officer attitudes. The results from the current study represent an initial piece of evidence suggesting de-escalation training may lead to greater use of those tactics by officers during encounters with citizens.

Financial battle against climate change – assessing effectiveness using a scorecard

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Candauda Arachchige Saliya ◽  
Suesh Kumar Pandey
Keyword(s):  
Climate Change ◽  
Financial Risk ◽  
Financial System ◽  
Regulatory Agencies ◽  
Theoretical Frameworks ◽  
Content Type ◽  
Banking Regulations ◽  
And Control ◽  
The Impact ◽  
Practical Implications

Purpose This paper aims to investigate how and to what extent the Fijian sustainable banking regulations or guidelines are designed, communicated, implemented and monitored within the financial system in Fiji. A scorecard is introduced for this purpose to assess the effectiveness of Fiji’s financial battle against climate change (FBACC). Design/methodology/approach This study uses a mixed-method methodology. Data were collected mainly from a survey and supplemented by interviews, observations and documents. The scorecard was developed by building on existing two theoretical frameworks, namely, the Sustainable Banking Assessment and Climate Change Governance Index, to make them more appropriate and practically applicable to less developed financial systems in emerging economies such as Fiji. This FBACC scorecard consists of four perspectives, eight critical factors and 24 criteria. Findings The results show that the overall FBACC score averages 40.75%, and all the perspectives scored below 50%, the benchmark. Only the CF “policy” scored 54.25% because of a high positive response of 82.3% for the “political leadership” criterion. The relative contributions of each perspective in constructing the overall score are distributed as 28%, 25%, 24% and 23% among planning, action, accountability and control, respectively. Research limitations/implications These results were complemented by the information shared during the interviews and confirmed that the existing political initiatives need to be effectively communicated and/or implemented in the financial system by the regulatory agencies. Practical implications This FBACC scorecard can be applied to other underdeveloped systems in emerging countries to assess the effectiveness of the sustainable banking regulations and/or guidelines in those countries in relation to the FBACC. It can also be applied to individual firms to assess their contribution to the FBACC. Originality/value To the authors’ best knowledge, this might be the first study in Fiji that considers the impact of climate-related financial risk on the Fijian financial system.

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