scholarly journals Application of Composite Spectrum in Agricultural Machines

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5519
Author(s):  
Fernando Feijoo ◽  
Francisco Javier Gomez-Gil ◽  
Jaime Gomez-Gil

Composite spectrum (CS) is a data-fusion technique that reduces the number of spectra to be analyzed, simplifying the analysis process for machine monitoring and fault detection. In this work, vibration signals from five components of a combine harvester (thresher, chopper, straw walkers, sieve box, and engine) are obtained by placing four accelerometers along the combine-harvester chassis in non-optimal locations. Four individual spectra (one from each accelerometer) and three CS (non-coherent, coherent and poly-coherent spectra) from 18 cases are analyzed. The different cases result from the combination of three working conditions of the components—deactivated (off), balanced (healthy), and unbalanced (faulty)—and two speeds—idle and maximum revolutions per minute (RPM). The results showed that (i) the peaks can be identified in the four individual spectra that correspond to the rotational speeds of the five components in the analysis; (ii) the three formulations of the CS retain the relevant information from the individual spectra, thereby reducing the number of spectra required for monitoring and detecting rotating unbalances within a combine harvester; and, (iii) data noise reduction is observed in coherent and poly-coherent CS with respect to the non-coherent CS and the individual spectra. This study demonstrates that the rotating unbalances of various components within agricultural machines, can be detected with a reduced number of accelerometers located in non-optimal positions, and that it is feasible to simplify the monitoring with CS. Overall, the coherent CS may be the best composite spectra formulation in order to monitor and detect rotating unbalances in agricultural machines.

2020 ◽  
Vol 57 (1) ◽  
pp. 199-216 ◽  
Author(s):  
Hannah Smidt

False information, rumours and hate speech can incite violent protest and rioting during electoral periods. To counter such disinformation, United Nations peacekeeping operations (PKOs) routinely organize election-education events. While researchers tend to study how PKOs affect armed group and state behaviour, this study shifts the focus to civilians. It argues that PKOs’ election education reduces violent protest and rioting involving civilians during electoral periods via three pathways. First, learning about PKOs’ electoral security assistance during election-education events may convince people that political opponents cannot violently disturb elections, thereby mitigating fears of election violence. Second, election-education events provide politically relevant information that can strengthen political efficacy and people’s ability to make use of peaceful political channels. Finally, peace messages during election-education events can change people’s calculus about the utility and appropriateness of violent behaviour. Together, these activities mitigate fears, reduce political alienation and counter civilians’ willingness to get involved in violence. To test these expectations, I combine survey data on people’ perceptions and attitudes, events data on violent protest and rioting, and a novel dataset on local-level election-education events carried out by the PKO in Côte d’Ivoire before four elections held between 2010 and 2016. The results show that when the PKO is perceived to be an impartial arbiter, its election-education events have violence-mitigating effects at the individual and subnational levels.


Revista Trace ◽  
2018 ◽  
pp. 62
Author(s):  
Patrick Pérez

En México, el “sueño americano” no deja de ser reciente, las expectativas del personal de cuidado de la salud en materia de movilidad dependen de la iniciativa individual. Los factores que determinan tanto la migración, como la admisión de los candidatos, son numerosos y difíciles de objetivar, debido a que se encuentran sedimentados por la historia y las complejas relaciones con Estados Unidos, que simbolizan la promesa de un “horizonte de movilidad abierto”, con referencia al cual se desprecian profundamente las condiciones de trabajo en el país de origen. Sin embargo, las condiciones reales de trabajo en Estados Unidos no son tan idílicas como los estudiantes gustan creerlo.Abstract: In Mexico, the “American dream” is still a topical issue. The expectations of the healthcare workers in terms of mobility depends on the individual initiative. The factors which determine migration, as well as the admission of candidates are numerous and uneasy to specify, given that they are frozen by history and complex relations with the United States, which symbolizes the promise of an “open mobility horizon”, in reference to the disregard of working conditions in their home country. However, the real working conditions in the United-States are not as idyllic as the students want to believe.Résumé : Au Mexique, le « rêve américain » n’en finit pas d’être d’actualité. Les perspectives du personnel de santé en matière de mobilité dépendent de l’initiative individuelle. Les facteurs déterminants de la migration, ainsi que de l’admission des candidats sont nombreux et difficiles à spécifier, puisqu’ils sont figés par l’histoire et les relations complexes avec les États-Unis, lesquels symbolisent la promesse d’un « horizon de mobilité ouvert », et font référence au mépris des conditions de travail dans le pays d’origine. Cependant, les conditions réelles de travail aux États-Unis ne sont pas aussi idylliques que les étudiants veulent le croire.


2019 ◽  
Vol 3 (1) ◽  
pp. 67
Author(s):  
Kyle Goslin ◽  
Markus Hofmann

<p>Automatic Search Query Enhancement (ASQE) is the process of modifying a user submitted search query and identifying terms that can be added or removed to enhance the relevance of documents retrieved from a search engine. ASQE differs from other enhancement approaches as no human interaction is required. ASQE algorithms typically rely on a source of a priori knowledge to aid the process of identifying relevant enhancement terms. This paper describes the results of a qualitative analysis of the enhancement terms generated by the Wikipedia NSubstate Algorithm (WNSSA) for ASQE. The WNSSA utilises Wikipedia as the sole source of a priori knowledge during the query enhancement process. As each Wikipedia article typically represents a single topic, during the enhancement process of the WNSSA, a mapping is performed between the user’s original search query and Wikipedia articles relevant to the query. If this mapping is performed correctly, a collection of potentially relevant terms and acronyms are accessible for ASQE. This paper reviews the results of a qualitative analysis process performed for the individual enhancement term generated for each of the 50 test topics from the TREC-9 Web Topic collection. The contributions of this paper include: (a) a qualitative analysis of generated WNSSA search query enhancement terms and (b) an analysis of the concepts represented in the TREC-9 Web Topics, detailing interpretation issues during query-to-Wikipedia article mapping performed by the WNSSA.</p>


2021 ◽  
Vol 113 ◽  
pp. 00086
Author(s):  
I.F. Timerbulatov ◽  
I.R. Khabibullina ◽  
G.F. Tulitbaeva

This article is devoted to the study of the issues of identifying the optimal working conditions of a teacher of a higher educational institution and the significant characteristics of the style of his activity (in particular, the peculiarities of the style of self-regulation) allows us to identify the factors that prevent the development of professional burnout. The significance of the work also lies in the possibility of using the results of the study both in the process of preventing professional burnout of teachers, and in conducting scientific research on such topics. The research materials can become the basis for educational work. In this regard, an experimental study is becoming relevant, the purpose of which is to study the influence of professional burnout on the individual style of pedagogical activity of a higher school teacher.


Author(s):  
Ewa Górska

A disabled person in a company is affected by a number of various environmental conditions. Among these the most important are such as organizational, technical, social, economic and, finally, legal working conditions. The standard and quality of the just mentioned conditions determine significantly the way in which a disabled person performs the assigned tasks and duties in the company and it also helps to create the individual sense of self-fulfillment and work satisfaction. What is more, at the same time the level of environmental conditions influences directly work efficiency and profits of the company. It must be clearly stated that working conditions do not appear immediately and spontaneously - they need careful planning and modern organization. This research paper presents the environmental conditions and discusses a model design of the work organization for the disabled people.


2010 ◽  
Vol 70 (4) ◽  
pp. 420-427 ◽  
Author(s):  
Eleanor Jay ◽  
Parisa Aslani ◽  
DK Raynor

Background: Consumer Medicine Information (CMI) forms an important basis for the dissemination of medicines information worldwide. Methods: This article presents an overview of the design and development of Australian CMI, and discusses ‘user-testing’ as an iterative, formative process for CMI design. Findings: In Australia, legislation and templates guide the creation of CMI by pharmaceutical manufacturers using principles of written health information design, giving consideration to both content and structure. Following these principles to the letter, however, does not always assure the creation of a useable document. A suggested method to gauge the usability of CMI is ‘user-testing’. The process, based on observing individuals using the CMI to answer specific questions, aims to identify areas of weakness in the document allowing targeted improvement. Each question identifies whether (a) the individual can find the relevant information and (b) they can understand it. It is an iterative process designed to be performed repeatedly until it results in a highly-useable CMI. Crucially, the revisions of this information between rounds of testing need to be based on principles of good writing and information design. Other methods of analysing CMI do not actively engage the target audience while simultaneously testing the usability of both content and structure. Although developed in Australia, user testing is not routinely performed on Australian CMI. This is despite the fact that user testing is a legal requirement for leaflets for all new medicines across the European Union (EU). Conclusions: Given CMI’s role in empowering patients with information, it follows that every attempt should be made to ensure that they are consumer friendly and usable. There is a strong argument that user testing should be employed in writing medicine information.


2021 ◽  
Author(s):  
Eleanor Gordon ◽  
Briony Jones

The experiences and marginalisation of international organisation employees with caring responsibilities has a direct negative impact on the type of security and justice being built in conflict-affected environments. This is in large part because international organisations fail to respond to the needs of those with caring responsibilities, which leads to their early departure from the field, and negatively affects their work while in post. In this toolkit we describe this problem, the exacerbating factors, and challenges to overcoming it. We offer a theory of change demonstrating how caring for carers can both improve the working conditions of employees of international organisations as well as the effectiveness, inclusivity and responsiveness of peace and justice interventions. This is important because it raises awareness among employers in the sector of the severity of the problem and its consequences. We also offer a guide for employers for how to take the caring responsibilities of their employees into account when developing human resource policies and practices, designing working conditions and planning interventions. Finally, we underscore the importance of conducting research on the gendered impacts of the marginalisation of employees with caring responsibilities, not least because of the breadth and depth of resultant individual, organisational and sectoral harms. In this regard, we also draw attention to the way in which gender stereotypes and gender biases not only inform and undermine peacebuilding efforts, but also permeate research in this field. Our toolkit is aimed at international organisation employees, employers and human resources personnel, as well as students and scholars of peacebuilding and international development. We see these communities of knowledge and action as overlapping, with insights to be brought to bear as well as challenges to be overcome in this area. The content of the toolkit is equally relevant across these knowledge communities as well as between different specialisms and disciplines. Peacebuilding and development draw in experts from economics, politics, anthropology, sociology and law, to name but a few. The authors of this toolkit have come together from gender studies, political science, and development studies to develop a theory of change informed by interdisciplinary insights. We hope, therefore, that this toolkit will be useful to an inclusive and interdisciplinary set of knowledge communities. Our core argument - that caring for carers benefits the individual, the sectors, and the intended beneficiaries of interventions - is relevant for students, researchers, policy makers and practitioners alike.


Author(s):  
Stephan Mueller ◽  
Flavia Baldassarri ◽  
Julia Schönfeld ◽  
Martin Halle

Cardiovascular exercise performance is associated with lower morbidity and mortality. In addition to maximal load, heart rate, and peak oxygen consumption, cardiopulmonary exercise testing and lactate analyses can provide relevant information on cardiovascular performance, diagnosis, exercise prescription, and monitoring of exercise programmes based on submaximal parameters. Using submaximal thresholds has the advantage that the prescription and effect of exercise training are directly linked to the underlying energy metabolism and therefore can reveal the specific needs of the individual. There are several methods ofr strength testing that are all based on maximum parameters and should be chosen according to the best-fit principle to the underlying strength training programme. In addition, new media such as wearables, innovative gadgets and telemonitoring have become increasingly popular in recent years and can be used to monitor the exercise training sessions, providing information for evaluation and adjustment of training if necessary.


Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1841
Author(s):  
Linjie Li ◽  
Mian Zhang ◽  
Kesheng Wang

Deep learning-based intelligent fault diagnosis methods have attracted increasing attention for their automatic feature extraction ability. However, existing works are usually under the assumption that the training and test dataset share similar distributions, which unfortunately always violates real practice due to the variety of working conditions. In this paper, an end-to-end scheme of joint use of two-direction signals and capsule network (CN) is proposed for fault diagnosis of rolling bearing. With the help of the superior ability of CN in capturing the spatial position information between features, more valuable information can be mined. Aiming to eliminate the influence of different rotational speeds, vertical and horizontal vibration signals are fused as the input to CN, so that invariant features can be extracted automatically from the raw signals. The effectiveness of the proposed method is verified by experimental data of rolling bearing under different rotational speeds and compared with a deep convolutional neural network (DCNN). The results demonstrate that the proposed scheme is able to recognize the fault types of rolling bearing under scenarios of different rotational speeds.


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