scholarly journals Design of Human-Centered Collaborative Assembly Workstations for the Improvement of Operators’ Physical Ergonomics and Production Efficiency: A Case Study

2020 ◽  
Vol 12 (9) ◽  
pp. 3606 ◽  
Author(s):  
Luca Gualtieri ◽  
Ilaria Palomba ◽  
Fabio Antonio Merati ◽  
Erwin Rauch ◽  
Renato Vidoni
Keyword(s):  
Production Efficiency ◽  
Production Systems ◽  
Work Conditions ◽  
Production Performance ◽  
Collaborative Robots ◽  
Left Part ◽  
Physical Ergonomics ◽  
Human Skills ◽  
The Right

Industrial collaborative robotics is one of the main enabling technologies of Industry 4.0. Collaborative robots are innovative cyber-physical systems, which allow safe and efficient physical interactions with operators by combining typical machine strengths with inimitable human skills. One of the main uses of collaborative robots will be the support of humans in the most physically stressful activities through a reduction of work-related biomechanical overload, especially in manual assembly activities. The improvement of operators’ occupational work conditions and the development of human-centered and ergonomic production systems is one of the key points of the ongoing fourth industrial revolution. The factory of the future should focus on the implementation of adaptable, reconfigurable, and sustainable production systems, which consider the human as their core and valuable part. Strengthening actual assembly workstations by integrating smart automation solutions for the enhancement of operators’ occupational health and safety will be one of the main goals of the near future. In this paper, the transformation of a manual workstation for wire harness assembly into a collaborative and human-centered one is presented. The purpose of the work is to present a case study research for the design of a collaborative workstation to improve the operators’ physical ergonomics while keeping or increasing the level of productivity. Results demonstrate that the achieved solution provides valuable benefits for the operators’ working conditions as well as for the production performance of the companies. In particular, the biomechanical overload of the worker has been reduced by 12.0% for the right part and by 28% for the left part in terms of manual handling, and by 50% for the left part and by 57% for the right part in terms of working postures. In addition, a reduction of the cycle time of 12.3% has been achieved.

Study on the Scheduling Problem of Powder Painting Production - A Case Study

2010 ◽  
Vol 97-101 ◽  
pp. 2459-2464
Author(s):  
Zhang Yong Hu ◽  
Qiang Su ◽  
Jun Liu ◽  
Hai Xia Yang
Keyword(s):  
Large Scale ◽  
Production Efficiency ◽  
Production Performance ◽  
Mixed Integer ◽  
Scheduling Problem ◽  
Adaptive Search ◽  
Optimal Sequence ◽  
Integer Nonlinear Programming ◽  
Minlp Model

A large-scale powder-painting scheduling problem is explored. The purpose is to find out the optimal sequence of a number of batches that dynamically arrive from upstream processes within a given scheduling horizon. The objective is to enhance the production efficiency and decrease the production cost as well. To solve this problem, a mixed integer nonlinear programming (MINLP) model is constructed and an algorithm called greedy randomized adaptive search procedure (GRASP) is designed. Case studies demonstrate that the proposed approach can improve the production performance significantly.

scholarly journals Mixed farming diversification may be costly: southern Queensland case study

2017 ◽  
Vol 68 (4) ◽  
pp. 378 ◽  
Author(s):  
A. F. Zull ◽  
J. Owens ◽  
M. Bourgault ◽  
B. Johnson ◽  
G. Peck ◽  
...  
Keyword(s):  
Production Systems ◽  
Farming System ◽  
Order System ◽  
Case Scenario ◽  
Worst Case ◽  
Local Climate ◽  
Mixed Farming ◽  
The Right ◽  
Semi Arid

Many farmers in Australia and in other countries have a choice of crop or livestock production, and many choose a mixture of both, based on risk preference, personal interests, markets, land resources and local climate. Mixed farming can be a risk-spreading strategy, especially in highly variable climates, but the right scales of each enterprise within the mix may be critical to farm profitability. To investigate expected farm profits, the probability of breaking even, as well as the worst and best case scenarios, we used farm data and APSIM (Agricultural Production Systems Simulator) to simulate the production of a typical, semi-arid, mixed-farm in southern Queensland. Three farming system scenarios were investigated: I, livestock and more intensive cropping; II, current production system of livestock and minimal cropping; and III, livestock only. We found that the expected profits were in the order system I > system III > system II. The key reason for the lower profits of system II was the high overhead cost of capital to continue some cropping, with low annual cropping income. Under the worst case scenario, in years with low rainfall, system I had the greatest downside risk with far greater financial losses. Systems I and III had similar probabilities of breaking even, and higher than system II, which incurs cropping overheads and limited cropping returns. Therefore, system II was less desirable than either system I or III. This case study helps farmers and advisors of semi-arid mixed farming enterprises to be better informed when making decisions at the paddock and whole-farm level, in both the short and long term, with respect to profit and risk. The method used in this paper can be applied to other mixed farms, in Australia and elsewhere.

Prospects for the development of agrarian production systems in in the Right Bank Polesie of Ukraine

2018 ◽  
Vol 2 (95) ◽  
pp. 69-72
Author(s):  
Yu.A. Tarariko ◽  
L.V. Datsko ◽  
M.O. Datsko
Keyword(s):  
Agricultural Production ◽  
Production Systems ◽  
Economic Feasibility ◽  
Capital Investments ◽  
Resource Potential ◽  
Grain Processing ◽  
Processing And Storage ◽  
The Right ◽  
And Storage ◽  
Agricultural Production Systems

The aim of the work is to assess the existing and prospective models for the development of agricultural production in Central Polesie on the basis of economic feasibility and ecological balance. The evaluation of promising agricultural production systems was carried out with the help of simulation modeling of various infrastructure options at the levels of crop and multisectoral specialization of agroecosystems. The agro-resource potential of Central Polesie is better implemented in the rotation with lupine, corn and flax dolguntsem with well-developed infrastructure, including crop, livestock units, grain processing and storage systems, feed, finished products and waste processing in the bioenergetic station. The expected income for the formation of such an infrastructure is almost 8 thousand dollars. / with a payback period of capital investments of 2-3 years.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

Traditionalism and politics: A case study of Northern Nigeria

1967 ◽  
Vol 2 (4) ◽  
pp. 509-524 ◽  
Author(s):  
B. J. O. Dudley
Keyword(s):  
Social Change ◽  
Local Government ◽  
Status Quo ◽  
Political Elite ◽  
High Time ◽  
The Political ◽  
Northern Nigeria ◽  
The North ◽  
The Right

In the debate on the Native Authority (Amendment) Law of 1955, the late Premier of the North, Sir Ahmadu Bello, Sardauna of Sokoto, replying to the demand that ‘it is high time in the development of local government systems in this Region that obsolete and undemocratic ways of appointing Emirs’ Councils should close’, commented that ‘the right traditions that we have gone away from are the cutting off of the hands of thieves, and that has caused a lot of thieving in this country. Why should we not be cutting (off) the hands of thieves in order to reduce thieving? That is logical and it is lawful in our tradition and custom here.’ This could be read as a defence against social change, a recrudescence of ‘barbarism’ after the inroads of pax Britannica, and a plea for the retention of the status quo and the entrenched privilege of the political elite.

scholarly journals MODEL-BASED DESIGN OF AM COMPONENTS TO ENABLE DECENTRALIZED DIGITAL MANUFACTURING SYSTEMS

2021 ◽  
Vol 1 ◽  
pp. 2127-2136
Author(s):  
Olivia Borgue ◽  
John Stavridis ◽  
Tomas Vannucci ◽  
Panagiotis Stavropoulos ◽  
Harry Bikas ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Systems ◽  
Production Systems ◽  
Data Generation ◽  
Production Networks ◽  
Model Based ◽  
Manufacturing Technologies ◽  
Am Processes ◽  
Final Consumer

AbstractAdditive manufacturing (AM) is a versatile technology that could add flexibility in manufacturing processes, whether implemented alone or along other technologies. This technology enables on-demand production and decentralized production networks, as production facilities can be located around the world to manufacture products closer to the final consumer (decentralized manufacturing). However, the wide adoption of additive manufacturing technologies is hindered by the lack of experience on its implementation, the lack of repeatability among different manufacturers and a lack of integrated production systems. The later, hinders the traceability and quality assurance of printed components and limits the understanding and data generation of the AM processes and parameters. In this article, a design strategy is proposed to integrate the different phases of the development process into a model-based design platform for decentralized manufacturing. This platform is aimed at facilitating data traceability and product repeatability among different AM machines. The strategy is illustrated with a case study where a car steering knuckle is manufactured in three different facilities in Sweden and Italy.

scholarly journals Fieldwork on epistemic authority markers: What we can learn from different types of data

2020 ◽  
Vol 54 (2) ◽  
pp. 405-445 ◽  
Author(s):  
Karolina Grzech
Keyword(s):  
Data Collection ◽  
Discourse Markers ◽  
Epistemic Modality ◽  
Linguistic Meaning ◽  
Epistemic Authority ◽  
Data Collection And Analysis ◽  
The Right To Know ◽  
Cognitive Study ◽  
The Right

AbstractEpistemicity in language encompasses various kinds of constructions and expressions that have to do with knowledge-related aspects of linguistic meaning (cf. Grzech, Karolina, Eva Schultze-Berndt and Henrik Bergqvist. 2020c. Knowing in interaction: an introduction. Folia Linguistica [this issue]). It includes some well-established categories, such as evidentiality and epistemic modality (Boye, Kasper. 2012. Epistemic meaning: A crosslinguistic and functional-cognitive study. Berlin: De Gruyter Mouton), but also categories that have been less well described to-date. In this paper, I focus on one such category: the marking of epistemic authority, i.e. the encoding of “the right to know or claim” (Stivers, Tanya, Lorenza Mondada & Jakob Steensig. 2011b. Knowledge, morality and affiliation in social interaction. In Stivers et al. 2011a). I explore how the marking of epistemic authority can be documented and analysed in the context of linguistic fieldwork. The discussion is based on a case study of Upper Napo Kichwa, a Quechuan language spoken in the Ecuadorian Amazon that exhibits a rich paradigm of epistemic discourse markers, encoding meanings related to epistemic authority and distribution of knowledge between discourse participants. I describe and appraise the methodology for epistemic fieldwork used in the Upper Napo Kichwa documentation and description project. I give a detailed account of the different tools and methods of data collection, showing their strengths and weaknesses. I also discuss the decisions made at the different stages of the project and their implications for data collection and analysis. In discussing these issues, I extrapolate from the case study, proposing practical solutions for fieldwork-based research on epistemic markers.

Unemployment in the Affective Economy: Exploring the Affective Governing of Young Unemployed People in the Danish Welfare State

2020 ◽  
Vol 66 (3) ◽  
pp. 335-361
Author(s):  
Sabina Pultz
Keyword(s):  
Welfare State ◽  
Complex Relationship ◽  
Field Observations ◽  
Unemployed People ◽  
Political Implications ◽  
Governmentality Studies ◽  
The Right ◽  
The Unemployed ◽  
The Ideal

Abstract This case study investigates the affective governing of young unemployed people, and it concludes that getting money in the Danish welfare state comes with an “affective price”. In the quest for a job, unemployed people have been increasingly responsibilized in order to live up to the ideal of the active jobseeker. Consequently, when faced with unemployment, they are encouraged to work harder on themselves and their motivation. Based on an interview study with young unemployed people (N=39) and field observations made at employment fund agencies in Denmark (2014–15), I explore how young unemployed people are governed by and through their emotions. By supplementing governmentality studies (Foucault et al. 1988, 2010) with the concept of “affective economy” from Ahmed (2014), I discuss how young unemployed people who receive money from the Danish state are placed in a situation of debt. The paper unfolds how this debt becomes visible as the unemployed people often describe feeling under suspicion for not doing enough, for not being motivated enough. Through an abundance of (pro) activity, they have to prove the suspicion of being lazy wrong, and through managing themselves as active jobseekers, they earn the right to get money from the state. Here motivation, passion and empowerment are key currencies. I discuss the intricate interplay between monetary and affective currencies as well as political implications in the context of the Danish welfare. The article contributes by making visible the importance of taking affective matters into account when investigating the complex relationship between politics and psychology.

HOUSEHOLD FORMATION IN 19TH-CENTURY CENTRAL ANATOLIA: THE CASE STUDY OF A TURKISH-SPEAKING ORTHODOX CHRISTIAN COMMUNITY

2002 ◽  
Vol 34 (3) ◽  
pp. 495-517
Author(s):  
Irini Renieri
Keyword(s):  
Central Anatolia ◽  
Household Formation ◽  
Greek Orthodox ◽  
Christian Community ◽  
Orthodox Christian ◽  
Complex Forms ◽  
The Right ◽  
Extended Households ◽  
The Village

This article explores household formation among the Greek Orthodox population of a mixed village of Cappadocia inhabited by Muslims, as well. The village, Çukur, was located on the right bank of the river Kızılırmak, 49 kilometers north–northwest of Kayseri.1 I aim to show that complex forms of household formation were the main type of social organization and were especially durable over time, with a high average household membership. I attempt to clarify whether the predominance of extended households—which, as other studies have shown, is not that common in the Asian portion of the Ottoman Empire—was related to the Christian character of this section of the Çukur population, or whether the agricultural basis of the village economy played a more important role.

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