Nanomechanical Cantilever Biosensors: Conceptual Design, Recent Developments, and Practical Implementation

Author(s):  
Mana Afshari ◽  
Nader Jalili
Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1279
Author(s):  
Rabeay Y.A. Hassan ◽  
Ferdinando Febbraio ◽  
Silvana Andreescu

Microbial electrochemical systems are a fast emerging technology that use microorganisms to harvest the chemical energy from bioorganic materials to produce electrical power. Due to their flexibility and the wide variety of materials that can be used as a source, these devices show promise for applications in many fields including energy, environment and sensing. Microbial electrochemical systems rely on the integration of microbial cells, bioelectrochemistry, material science and electrochemical technologies to achieve effective conversion of the chemical energy stored in organic materials into electrical power. Therefore, the interaction between microorganisms and electrodes and their operation at physiological important potentials are critical for their development. This article provides an overview of the principles and applications of microbial electrochemical systems, their development status and potential for implementation in the biosensing field. It also provides a discussion of the recent developments in the selection of electrode materials to improve electron transfer using nanomaterials along with challenges for achieving practical implementation, and examples of applications in the biosensing field.


Author(s):  
E. N. Cuesta ◽  
V. R. Rastelli ◽  
L. U. Medina ◽  
N. I. Montbrun ◽  
S. E. Diaz

Recent developments improving load capacity foretell the practical implementation of Active Magnetic Bearings (AMB) on industrial level, pushed by the advantages of reduced wear and higher speeds that they make available. However, the possibility of an eventual power failure forces the use of back-up (catcher) bearings, which usually are of the ball bearing type. The back-up bearings present a clearance between the shaft and the inner race, such that there is not contact during normal operation. On a power failure or an emergency stop, the rotor is only supported by the catcher bearings. Thus, the rotor motion within the clearance results on a succession of impacts, contact and non-contact intervals producing a non-linear behavior of the system. The complexity of this non-linear behavior prevents the use of traditional methods for the design of the catcher bearings, calling for the need of extensive experimentation and previous experience in their dimensioning process. Here, the response of a rigid rotor, supported by a pivot on the drive side and a magnetic bearing on the other side, is measured during the emergency stop from several operating speeds. Non-linear analysis tools, such as Poincare´ Maps and Bifurcation Diagrams, are employed to demonstrate the non-linear characteristics of the motion, which in some conditions is shown to become chaotic with a vibration limit cycle. The rotor motion on the catcher bearings (with the magnetic bearing deactivated) is measured at constant running speeds. The limit cycles and chaotic attractors are described, showing the relation of the non-linear effects to the rotational speed.


TEM Journal ◽  
2021 ◽  
pp. 1454-1460
Author(s):  
Pavel Zlatarov ◽  
Ekaterina Ivanova ◽  
Galina Ivanova ◽  
Julia Doncheva

Various researchers, institutions and companies have been increasingly working on and using e-learning systems in the past. However, with the recent developments, the demand for learning systems that can adapt to learners’ need and development level has risen considerably. A lot of learning from a distance requires new approaches in teaching, It is more important than ever for teachers to be able to accurately test students’ knowledge, determine the appropriate level of difficulty and adjust content accordingly. This paper describes the design, development and use of a web-based application used to prepare tests for students and determine their level as a module of an integrated personalized learning system. Results from a practical implementation of the system are also discussed.


Author(s):  
Shaw C. Feng ◽  
Walter W. Nederbragt ◽  
Serge Kaing ◽  
Ram D. Sriram

Abstract This paper describes recent developments in the Design and Process Planning Integration (DPPI) project at the National Institute of Standards and Technology (NIST). The project addresses the need for improved communication between design and process planning in the early product design stage. Since major manufacturing costs are committed during product specification and design, it is critical to successfully assess manufacturability and cost as early as possible in the design process. Documenting the DPPI foundation, this paper reviews industry needs for an integrated design and manufacturing environment for rapid product development. Additionally, this paper describes the project’s approach and the current status. Conceptual design and process planning prototype systems, that have been implemented, are also described. Finally, it describes the future direction for developing mechanisms to enable the integration of design and process planning, including information models and language interface specifications.


2014 ◽  
Vol 14 (6) ◽  
pp. 1150-1176
Author(s):  
Julia Rutz*

Despite Palestine’s endeavour to seek full UN membership and herewith gain the support of the international community, strong tendencies towards violating basic fair trial principles can be observed on the ground. This article provides an in-depth exploration of the current Rule of Law building efforts in the occupied Palestinian Territories by an exemplary analysis of the status of the right to defence. The study examines the legal situation of the right to defence in Palestine and how those regulations are interpreted and applied in everyday practice. Considering recent developments of access to legal defence and legal aid on the UN and EU level, this article demonstrates the importance of granting comprehensive access to defence as part of the rule of law building efforts, and also underlines the necessity of its application during the early stages of criminal procedure.


Author(s):  
Mykhaylo Luchko ◽  
Nataliya Melnyk

Introduction. Currently, the adoption of IFRS has become both an objective reality and a legal requirement for many domestic enterprises. International standards are a prerequisite for the formation of common approaches and objectives of financial statements, IFRS are focused on the presentation of real and objective accounting and reporting information about the financial position, as well as allow an impartial assessment of the opportunities and prospects of the enterprise. However, the implementation of IFRS requires amendments to the applicable regulations, national standards, clarification of terminology, development of practical recommendations, definition of tools and timing of the transition. As a significant expansion of the IFRS reporting segment is underway in Ukraine, new challenges, tasks, risks for practitioners and the professional accounting community are emerging. Purpose. The purpose of the article is to study the issues, practical aspects and methods of transition to the International Financial Reporting Standards, taking into account the requirements and changes of the current legislation, research of the categories, composition and structure of IFRS reporting. Methods. The methodological and informational basis of the research are regulations, scientific works, periodicals, open data from the Internet. Methods based on general and specific approaches to the study of economic phenomena, facts and processes were applied in the study, in particular: the dialectical cognition method (when summarizing the factors influencing the formation of IFRS financial statements), inductive (to transit from empirical data to practical use of IFRS requirements for systematic reporting, generalizations and conclusions that give an overview of the issues of IFRS reporting) and deductive (in the process of theoretical comprehension of the objectivity of the transition to IFRSs and obtaining partial conclusions to address the practical problems of such transition). Results. As a result of the study, the authors outlined the legal requirements for the content and structure of the first IFRS financial statements and their impact on the consistency and order of IFRS reporting; the practical stages of transition to IFRS have been identified and characterized; parallel accounting, translation and transformation have been described and critically evaluated as methods of financial reporting in the transition to IFRSs. It is emphasized that the transition to IFRS is not only associated with technical difficulties, but also complicates the organization of accounting services at the enterprise and influences management processes that rely on accounting reports and indicators. The problems of hiring qualified personnel, accountants training or involvement of outsourcing consultancies are considered. Recent developments concerning the Financial Reporting System (FRS) in electronic format on the XBRL standard for entities transitioning to IFRS have been analyzed. Discussion. Further research should be performed on the basis of domestic and international experience, taking into account the impact of IFRS implementation synergistic effect for different categories of businesses, and issues of practical implementation of financial reporting systems (FRS) in electronic format on the XBRL standard.


2017 ◽  
Vol 28 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Anabel González ◽  
Lucía del Río-Casanova ◽  
Ania Justo-Alonso

AbstractEmotion dysregulation is a frequent feature in trauma-related disorders. Different kinds of emotion dysregulation seem to be linked to particular psychiatric conditions, and there is growing evidence of the association between neurobiological correlates and those dysregulation patterns. Nevertheless, many of the recent findings from the field of the neurobiology have not been translated into clinical practice and are insufficiently contemplated in trauma-oriented therapies. The aim of this article is to review recent developments in the field of emotion regulation connecting these issue with the practical implementation of psychotherapeutic procedures. The evaluation of emotion dysregulation patterns can guide decision making during the therapy independently to the approach, but there are some findings that can be especially useful for some concrete modalities of therapy. In this article we will focus our discussion on how emotion dysregulation may influence eye movement desensitization and reprocessing (EMDR) treatment in trauma-related disorders. EMDR is a well-defined and protocol-based intervention, with a strong empirical support for post-traumatic stress disorder (PTSD). We describe how different patterns of emotion dysregulation may influence EMDR treatment and procedures, and also how the application of EMDR beyond non-dissociative PTSD should take into account the predominant emotion-regulation strategies in specific posttraumatic disorders.


Author(s):  
Gu¨l E. Okudan ◽  
Girish Rao

This paper reviews recent research on collaborative design thinking and software aids. The review has two foci: 1) collaborative design thinking, and 2) software aids. Recent developments regarding these foci are discussed for their contribution to collaborative design performance. The paper concludes with recommendations for future research.


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