scholarly journals De robotarm als collega

2021 ◽  
Vol 24 (2) ◽  
pp. 81-105
Author(s):  
Milan Wolffgramm ◽  
Stephan Corporaal ◽  
Maarten van Riemsdijk
Keyword(s):  
Industrial Robot ◽  
Direct Interaction ◽  
Added Value ◽  
Limited Attention ◽  
Production Worker ◽  
Industrial Practice ◽  
Content Type ◽  
Robotic Arms ◽  
Large Product ◽  
First Time

SUMMARY Dutch industrial manufacturers are confronted with a new and promising industrial robot: the collaborative robot (cobot). These small robotic arms are revolutionary as they allow direct and safe interaction with production workers for the very first time. The direct interaction between production worker and cobot has the potential to not only increase efficiency, but also enhance flexibility as it can align the strengths of (wo)man and machine more thoroughly. Currently, Dutch manufacturers are experimenting with cobots. To obtain a first understanding about the use of cobots in Dutch industrial practice and to see what the consequences are for production workers and production work, we conducted an exploratory interview study (N=61). We learnt that most cobots under study are used for the production of one or a few large product batches (mass production) and work highly autonomous. The interaction between cobot and production worker is limited and reduced to production workers preventing the cobot from falling into a standstill. The results tend to be in line with traditional industrial automation practices: an overemphasis on leveraging the technology’s potential and limited attention for the production workers’ work design and decision latitude. HR professionals were not involved and, therefore, miss out on a crucial opportunity to be of an added value.

An evaluation of preventive maintenance framework in an Italian manufacturing company

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kaustav Kundu ◽  
Fabiana Cifone ◽  
Federica Costa ◽  
Alberto Portioli-Staudacher ◽  
Matteo Rossini
Keyword(s):  
Preventive Maintenance ◽  
Management Plan ◽  
Added Value ◽  
Content Type ◽  
Starting Point ◽  
Manufacturing Company ◽  
World Class ◽  
Maintenance Model ◽  
First Time

PurposeThe purpose of this paper is to provide the description of an original framework for maintenance management plan development. The research aims to use in an integrated way different World Class Manufacturing (WCM)-based tools, in order to obtain a model which can be used for preventive maintenance in different industrial contexts.Design/methodology/approachIn this research, a conceptual framework of preventive maintenance was described and then it was evaluated through a qualitative study in an Italian company. The company was chosen based on an initial interview with the operations team and the model area was selected. Then, the location was reorganized in order to obtain a green field which could sustain the implementation of the framework tools.FindingsThe case study was carried out in a small-medium manufacturing company which produces quick-release couplings and multiconnections, ranging from medium to ultra-high pressure. The defined framework has proved to be easy to implement in a company with a corrective maintenance plan, allowing the maintenance department to embrace the preventive maintenance culture. The maintenance model has been well received from the employees.Practical implicationsThe framework allows a standardization of maintenance plans. Firstly, the standardization design itself allows finding previous wastes and consequent improvement areas. Then, it brings the improvement of a single machine which impacts all other machines in its family.Originality/valueThe added value of this study is the ability to integrate different WCM-based tools. Since the framework depicts a step-by-step process; it is also a starting point for companies that want to approach preventive maintenance for the first time.

Improving backdrivability in preoperative manual manipulability of minimally invasive surgery robot

2018 ◽  
Vol 45 (1) ◽  
pp. 127-140 ◽  
Author(s):  
Shuizhong Zou ◽  
Bo Pan ◽  
Yili Fu ◽  
Shuixiang Guo
Keyword(s):  
Kalman Filter ◽  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Real Time ◽  
Invasive Surgery ◽  
Control Algorithm ◽  
Industrial Robot ◽  
Universal Method ◽  
Content Type ◽  
Robotic Arms

Purpose The purpose of this paper is to propose a control algorithm to improve the backdrivability performance of minimally invasive surgical robotic arms, so that precise manual manipulations of robotic arms can be performed in the preoperative operation. Design/methodology/approach First, the flexible-joint dynamic model of the 3-degree of freedom remote center motion (RCM) mechanisms of minimally invasive surgery (MIS) robot is derived and its dynamic parameters and friction parameters are identified. Next, the angular velocities and angular accelerations of joints are estimated in real time by the designed Kalman filter. Finally, a control algorithm based on Kalman filter is proposed to enhance the backdrivability of RCM mechanisms by compensating for the internally generated gravitational, frictional and inertial resistances experienced during the positioning and orientating. Findings The parameter identification for RCM mechanisms can be experimentally evaluated from comparison between the measured torques and the reconstructed torques. The accuracy and convergence of the real-time estimation of angular velocity and acceleration of the joint by the designed Kalman filter can be verified from corresponding simulation experiments. Manual adjustment experiments and animal experiments validate the effectiveness of the proposed backdrivability control algorithm. Research limitations/implications The backdrivability control algorithm presented in this paper is a universal method to enhance the manual operation performance of robots, which can be used not only in the medical robot preoperative manual manipulation but also in robot haptic interaction, industrial robot direct teaching and active rehabilitation training of rehabilitation robot and so on. Originality/value Compared with other backdrivability design methods, the proposed algorithm achieves good backdrivability for RCM mechanisms without using force sensors and accelerometers. In addition, this paper presents a new static friction compensation approach for a joint moving with very low velocity.

Facility management services and employee well-being

2020 ◽  
Vol 18 (2) ◽  
pp. 109-130
Author(s):  
Efstratia Arampatzi ◽  
Martijn Burger
Keyword(s):  
Employee Performance ◽  
Well Being ◽  
Facility Management ◽  
Added Value ◽  
Physical Work ◽  
Limited Attention ◽  
Content Type ◽  
Physical Work Environment ◽  
Job Affect ◽  
The Relationship

Purpose Although a large number of studies have examined the relationship between the physical work environment and employee performance, the relationship between employee well-being and facility management (FM) has received limited attention. The purpose of this paper is to explore the relationship between FM services and employee well-being in terms of job satisfaction, satisfaction with the workplace, job affect and engagement within the context of the job demands-resources (JD-R) model, distinguishing between soft FM services and hard FM services. Design/methodology/approach The analysis is based on the responses of 1,390 employees, who responded to all the relevant items used in this analysis. In addition to the linear estimations, the research uses an instrumental variable (IV) estimation, the Lewbel IV estimator (Lewbel, 2012), to establish a causal relationship between FM services and employee well-being. Findings The findings of this paper suggest that there is a positive relationship between the FM index and the four well-being proxies. In addition, the findings indicate that the effect of soft FM on employee well-being is generally weaker than the effect of hard FM, especially with regard to job affect and engagement. Originality/value The current research treats FM services as a resource instead of a cost and goes beyond the financial value of FM by providing a quantitative analysis on the added value of FM services in terms of employee well-being. Most importantly, this study incorporates FM services in the JD-R model and uses an alternative approach to linear regression and traditional IV regression to solve for endogeneity issues.

scholarly journals Human β-Defensin 2 Induces Extracellular Accumulation of Adenosine in Escherichia coli

2013 ◽  
Vol 57 (9) ◽  
pp. 4387-4393 ◽  
Author(s):  
Andreia Bergamo Estrela ◽  
Manfred Rohde ◽  
Maximiliano Gabriel Gutierrez ◽  
Gabriella Molinari ◽  
Wolf-Rainer Abraham
Keyword(s):  
Escherichia Coli ◽  
Direct Interaction ◽  
Mass Spectrometry Analysis ◽  
Host Defense Peptides ◽  
Extracellular Adenosine ◽  
Content Type ◽  
Spectrometry Analysis ◽  
Inflammatory Processes ◽  
Extracellular Molecules ◽  
First Time

ABSTRACTHuman β-defensins are host defense peptides performing antimicrobial as well as immunomodulatory functions. The present study investigated whether treatment ofEscherichia coliwith human β-defensin 2 could generate extracellular molecules of relevance for immune regulation. Mass spectrometry analysis of bacterial supernatants detected the accumulation of purine nucleosides triggered by β-defensin 2 treatment. Other cationic antimicrobial peptides tested presented variable outcomes with regard to extracellular adenosine accumulation; human β-defensin 2 was the most efficient at inducing this response. Structural and biochemical evidence indicated that a mechanism other than plain lysis was involved in the observed phenomenon. By use of isotope (13C) labeling, extracellular adenosine was found to be derived from preexistent RNA, and a direct interaction between the peptide and bacterial nucleic acid was documented for the first time for β-defensin 2. Taken together, the data suggest that defensin activity on a bacterial target may alter local levels of adenosine, a well-known immunomodulator influencing inflammatory processes.

The digital cultural biography, a tool for interdisciplinary knowledge exchange on the history and heritage of the urban landscape

2016 ◽  
Vol 6 (1) ◽  
pp. 72-94 ◽  
Author(s):  
Maurice de Kleijn ◽  
Eduardo Dias ◽  
Gert-Jan Burgers
Keyword(s):  
Urban Landscape ◽  
Knowledge Exchange ◽  
Research Strategy ◽  
Added Value ◽  
Urban Landscapes ◽  
Geospatial Technologies ◽  
Content Type ◽  
Cultural Biography ◽  
Interdisciplinary Knowledge ◽  
First Time

Purpose – The purpose of this paper is to address the challenge for knowledge exchange between disciplines that study past urban landscapes, such as archaeologists, historians and historical geographers and disciplines that work on new urban landscapes such as architects and spatial planners. It presents the design, deployment and evaluation of a heritage instrument, the “digital cultural biography” (DCB), which aims to allow future-oriented disciplines to make more historical and heritage informed decisions. Design/methodology/approach – The paper makes three contributions. First it presents a methodology to disseminate geographic information across disciplines by applying the biography of the landscape research strategy. Second it translates this methodology to a digital instrument, the DCB, which makes it possible to configure the historical and heritage features diachronically as well as spatially. And third it evaluates the added value of this instrument by organizing a design concourse and applying various evaluation methods. The Roman neighbourhood of Testaccio functions as the use case for this study. Findings – The research shows a high potential to use digital tooling based on geospatial technologies to support the dialogue between future and past-oriented disciplines. Originality/value – The paper discusses how the recently developed biography of the landscape method can be used as a tool for collaboration between heritage managers and spatial planners. Moreover, for the first time it applies and evaluates digital tools and geospatial technologies to support this approach.

Design of spline surface vacuum gripper for pick and place robotic arms

2020 ◽  
Vol 4 (2) ◽  
pp. 48-55
Author(s):  
A. S. Jamaludin ◽  
M. N. M. Razali ◽  
N. Jasman ◽  
A. N. A. Ghafar ◽  
M. A. Hadi
Keyword(s):  
Cycle Time ◽  
Industrial Robot ◽  
Annealing Process ◽  
Vacuum Suction ◽  
Robotic Arms ◽  
Custom Made ◽  
Pick And Place ◽  
Manufacturing Procedure ◽  
Production Flexibility ◽  
The Impact

The gripper is the most important part in an industrial robot. It is related with the environment around the robot. Today, the industrial robot grippers have to be tuned and custom made for each application by engineers, by searching to get the desired repeatability and behaviour. Vacuum suction is one of the grippers in Watch Case Press Production (WCPP) and a mechanism to improve the efficiency of the manufacturing procedure. Pick and place are the important process for the annealing process. Thus, by implementing vacuum suction gripper, the process of pick and place can be improved. The purpose of vacuum gripper other than design vacuum suction mechanism is to compare the effectiveness of vacuum suction gripper with the conventional pick and place gripper. Vacuum suction gripper is a mechanism to transport part and which later sequencing, eliminating and reducing the activities required to complete the process. Throughout this study, the process pick and place became more effective, the impact on the production of annealing process is faster. The vacuum suction gripper can pick all part at the production which will lower the loss of the productivity. In conclusion, vacuum suction gripper reduces the cycle time about 20%. Vacuum suction gripper can help lower the cycle time of a machine and allow more frequent process in order to increase the production flexibility.

SAFETY AND RISK ASSESSMENT AT AUTOMATED WORKPLACE

2018 ◽  
pp. 78-84
Author(s):  
Marek Vagas
Keyword(s):  
Risk Assessment ◽  
Industrial Robot ◽  
Industrial Robots ◽  
Added Value ◽  
Growing Up ◽  
Target Setting ◽  
Clear View ◽  
General Safety

Urgency of the research. Automated workplaces are growing up in present, especially with implementation of industrial robots with feasibility of various dispositions, where safety and risk assessment is considered as most important issues. Target setting. The protection of workers must be at the first place, therefore safety and risk assessment at automated workplaces is most important problematic, which had presented in this article Actual scientific researches and issues analysis. Actual research is much more focused at standard workplaces without industrial robots. So, missing of information from the field of automated workplaces in connection with various dispositions can be considered as added value of article. Uninvestigated parts of general matters defining. Despite to lot of general safety instructions in this area, still is missed clear view only at automated workplace with industrial robots. The research objective. The aim of article is to provide general instructions directly from the field of automated workplaces The statement of basic materials. For success realization of automated workplace is good to have a helping hand and orientation requirements needed for risk assessment at the workplace. Conclusions. The results published in this article increase the awareness and information of such automated workplaces, together with industrial robots. In addition, presented general steps and requirements helps persons for better realization of these types of workplaces, where major role takes an industrial robot. Our proposed solution can be considered as relevant base for risk assessment such workplaces with safety fences or light barriers.

Conference report: innovation, interaction … and a lot of data: first time reflections on Internet Librarian International, UK 2018

2019 ◽  
Vol 36 (2) ◽  
pp. 21-22
Author(s):  
Ray Harper
Keyword(s):  
Best Practice ◽  
New Technologies ◽  
Conference Report ◽  
Library Services ◽  
New Techniques ◽  
Content Type ◽  
Making A Difference ◽  
Analyse Data ◽  
Physical Spaces ◽  
First Time

Purpose The purpose of this paper is to summarise a number of presentations at Day 1 of the Internet Librarian International conference, London, UK (16 October 2018). This was the 20th conference in the series, and the three key themes included were the next-gen library and librarian; understanding users, usage and user experience; and inclusion and inspiration: libraries making a difference. Design/methodology/approach This paper reports from the viewpoint of a first-time attendee of the conference. This summarises the main issues raised by each presentation and draws out the key learning points for practical situations. Findings The conference covered a variety of practical ways in which libraries can use technology to support users and make decisions about services. These include developing interactive physical spaces which include augmented reality; introducing “chat-bots” to support users; using new techniques to analyse data; and piloting new ways to engage users (such as coding clubs). A key theme was how we use and harness data in a way that is ethical, effective and relevant to library services. Originality/value This conference focussed on practical examples of how library and information services across sectors and countries are innovating in a period of huge change. The conference gave delegates numerous useful ideas and examples of best practice and demonstrated the strength of the profession in adapting to new technologies and developments.

Interest rate option hedging portfolios without bank account

2019 ◽  
Vol 37 (1) ◽  
pp. 134-142
Author(s):  
Alberto Bueno-Guerrero
Keyword(s):  
Design Methodology ◽  
Contingent Claim ◽  
Necessary And Sufficient Condition ◽  
Barrier Option ◽  
Bank Account ◽  
Content Type ◽  
Option Hedging ◽  
Hedging Portfolio ◽  
Necessary And Sufficient ◽  
First Time

Purpose This paper aims to study the conditions for the hedging portfolio of any contingent claim on bonds to have no bank account part. Design/methodology/approach Hedging and Malliavin calculus techniques recently developed under a stochastic string framework are applied. Findings A necessary and sufficient condition for the hedging portfolio to have no bank account part is found. This condition is applied to a barrier option, and an example of a contingent claim whose hedging portfolio has a bank account part different from zero is provided. Originality/value To the best of the authors’ knowledge, this is the first time that this issue has been addressed in the literature.

Counseling during Real Ear Measurements: The Clients' Perspective

2021 ◽  
Author(s):  
Angela Ryall ◽  
Lorienne M. Jenstad ◽  
John Pumford ◽  
Tami Howe ◽  
Garnet Grosjean
Keyword(s):  
Focus Groups ◽  
Hearing Aids ◽  
Visual Information ◽  
Best Practice ◽  
Qualitative Content Analysis ◽  
Hearing Aid ◽  
Added Value ◽  
Centered Care ◽  
Prior Literature ◽  
First Time

Abstract Background When dispensing hearing aids, audiologists must follow validated fitting and verification procedures to ensure that the hearing aids are properly fitted to the client's hearing. Real ear measurements (REMs) are best practice for verifying hearing aids. Prior literature regarding REMs has mainly focused on the clinicians' perspective. Purpose This study investigated informational counseling throughout REMs by gathering perspectives of first-time hearing aid users regarding the content and format of counseling. Research Design The study used an interpretive description approach with focus groups. Study Sample There were 16 adult participants (4 males, 12 females) who were first-time hearing aid users and who all had memory of REMs occurring during their own hearing aid verification. Intervention We investigated the addition of informational counseling during REM verification. Data Collection and Analysis Four focus groups were conducted to elicit feedback on a demonstration of informational counseling during REM hearing aid verification. The data from the focus groups were transcribed verbatim and analyzed using qualitative content analysis. Results Analysis revealed positive aspects, negative aspects, and suggested changes in relation to the verbal and visual information presented during the REM verification demonstration. These data fell into two broad categories: the interaction and transaction of informational counseling. Conclusion Most clients were interested in learning more about REMs if the information was accessible. Results provide recommendations for clinical audiologists and REM system manufacturers to make the information presented during informational counseling more client-friendly and individualized for client-centered care. To continue exploring this new inquiry, further experimental research is required to determine if there is any added value of incorporating informational counseling during REMs.

Sign in / Sign up

Export Citation Format

Share Document