scholarly journals The future of WRRF modelling – outlook and challenges

2018 ◽  
Vol 79 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Pusker Regmi ◽  
Heather Stewart ◽  
Youri Amerlinck ◽  
Magnus Arnell ◽  
Pau Juan García ◽  
...  
Keyword(s):  
Analytical Techniques ◽  
Resource Recovery ◽  
Gas Analysis ◽  
Sensor Data ◽  
Sustainable Technologies ◽  
The Future ◽  
Complex Models ◽  
On Line ◽  
Calibration Techniques ◽  
Process Complexity

Abstract The wastewater industry is currently facing dramatic changes, shifting away from energy-intensive wastewater treatment towards low-energy, sustainable technologies capable of achieving energy positive operation and resource recovery. The latter will shift the focus of the wastewater industry to how one could manage and extract resources from the wastewater, as opposed to the conventional paradigm of treatment. Debatable questions arise: can the more complex models be calibrated, or will additional unknowns be introduced? After almost 30 years using well-known International Water Association (IWA) models, should the community move to other components, processes, or model structures like ‘black box’ models, computational fluid dynamics techniques, etc.? Can new data sources – e.g. on-line sensor data, chemical and molecular analyses, new analytical techniques, off-gas analysis – keep up with the increasing process complexity? Are different methods for data management, data reconciliation, and fault detection mature enough for coping with such a large amount of information? Are the available calibration techniques able to cope with such complex models? This paper describes the thoughts and opinions collected during the closing session of the 6th IWA/WEF Water Resource Recovery Modelling Seminar 2018. It presents a concerted and collective effort by individuals from many different sectors of the wastewater industry to offer past and present insights, as well as an outlook into the future of wastewater modelling.

Research Situation Analysis of On-line Detection Technology for Power Transformer Winding Deformation

2020 ◽  
Vol 13 (6) ◽  
pp. 823-832
Author(s):  
Zhenhua Li ◽  
Weihui Jiang ◽  
Li Qiu ◽  
Zhenxing Li ◽  
Yanchun Xu
Keyword(s):  
Detection Method ◽  
Theoretical Research ◽  
Line Detection ◽  
Response Analysis ◽  
Advantages And Disadvantages ◽  
Detection Technology ◽  
The Future ◽  
Transformer Winding ◽  
On Line ◽  
Winding Deformation

Background: Winding deformation is one of the most common faults in power transformers, which seriously threatens the safe operation of transformers. In order to discover the hidden trouble of transformer in time, it is of great significance to actively carry out the research of transformer winding deformation detection technology. Methods: In this paper, several methods of winding deformation detection with on-line detection prospects are summarized. The principles and characteristics of each method are analyzed, and the advantages and disadvantages of each method as well as the future research directions are expounded. Finally, aiming at the existing problems, the development direction of detection method for winding deformation in the future is prospected. Results: The on-line frequency response analysis method is still immature, and the vibration detection method is still in the theoretical research stage. Conclusion: The ΔV − I1 locus method provides a new direction for on-line detection of transformer winding deformation faults, which has certain application prospects and practical engineering value.

scholarly journals DOLARS, a Distributed On-Line Activity Recognition System by Means of Heterogeneous Sensors in Real-Life Deployments—A Case Study in the Smart Lab of The University of Almería

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 405
Author(s):  
Marcos Lupión ◽  
Javier Medina-Quero ◽  
Juan F. Sanjuan ◽  
Pilar M. Ortigosa
Keyword(s):  
Real Time ◽  
Activity Recognition ◽  
Real Life ◽  
Recognition System ◽  
Machine Learning Algorithms ◽  
Sensor Data ◽  
Heterogeneous Sensors ◽  
On Line ◽  
The University

Activity Recognition (AR) is an active research topic focused on detecting human actions and behaviours in smart environments. In this work, we present the on-line activity recognition platform DOLARS (Distributed On-line Activity Recognition System) where data from heterogeneous sensors are evaluated in real time, including binary, wearable and location sensors. Different descriptors and metrics from the heterogeneous sensor data are integrated in a common feature vector whose extraction is developed by a sliding window approach under real-time conditions. DOLARS provides a distributed architecture where: (i) stages for processing data in AR are deployed in distributed nodes, (ii) temporal cache modules compute metrics which aggregate sensor data for computing feature vectors in an efficient way; (iii) publish-subscribe models are integrated both to spread data from sensors and orchestrate the nodes (communication and replication) for computing AR and (iv) machine learning algorithms are used to classify and recognize the activities. A successful case study of daily activities recognition developed in the Smart Lab of The University of Almería (UAL) is presented in this paper. Results present an encouraging performance in recognition of sequences of activities and show the need for distributed architectures to achieve real time recognition.

scholarly journals Musings on the future of scientific (physical but not socially distanced) conferences: testing the water with organizing the on-line MicroTAS2020

Lab on a Chip ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 987-993
Author(s):  
Séverine Le Gac ◽  
Hang Lu
Keyword(s):  
Best Practices ◽  
The Future ◽  
On Line

The purpose of this article is to reflect on and share our on-line MicroTAS2020 adventure and our view on new opportunities and best practices, and hopefully prompt the community to contribute to the conversations about how we move forward in the post-pandemic world.

Monitoring and modelling an industrial trickling filter using on-line off-gas analysis and respirometry

2000 ◽  
Vol 41 (12) ◽  
pp. 139-148 ◽  
Author(s):  
H. Vanhooren ◽  
D. Demey ◽  
I. Vannijvel ◽  
P. A. Vanrolleghem
Keyword(s):  
Phase Equilibrium ◽  
Model Calibration ◽  
Inorganic Carbon ◽  
Diffusion Constant ◽  
Gas Analysis ◽  
Trickling Filter ◽  
Process Characteristics ◽  
Substrate Diffusion ◽  
On Line ◽  
Ph Dependent

The process characteristics of an industrial scale trickling filter plant were quantified by means of a five day intensive measurement campaign with the use of on-line respirometry and on-line off-gas analysis. Respirometry was used to measure the readily biodegradable CODst and the off-gas sensor was used to monitor the O2 and CO2 content of the off-gases. To model the biodegradation in the filters, the model developed by Rauch et al. (1999) was used. It is based on the decoupling of two basic processes in biofilm systems, substrate diffusion and biodegradation. This model was extended with equations for the production and the pH-dependent liquid-phase equilibrium for inorganic carbon (IC). The measured effluent and off-gas concentrations could be followed very closely by the calibrated model. O2 and CO2 measurements revealed that the system was not always oxygen limited. The model calibration thus required the use of a very low value of the diffusion constant for readily biodegradable substrate.

scholarly journals Corporate social responsibility on the example of L’Oréal Polska

2021 ◽  
Vol 199 (1) ◽  
pp. 73-85
Author(s):  
Magdalena Raftowicz ◽  
Adriana Kryk ◽  
Izabela Kurtyka-Marcak
Keyword(s):  
Corporate Social Responsibility ◽  
Literature Review ◽  
Social Responsibility ◽  
The Future ◽  
On Line ◽  
Line Survey ◽  
Corporate Social ◽  
Further Development ◽  
Taking Responsibility ◽  
Forward Looking

The article aims to assess the benefits of implementing the corporate social responsibility (CRS) concept in enterprises and attempts to examine its impact on society and the environment. The analysis of the effectiveness of investments related to CSR was carried out based on literature review and own research (on-line survey) on the example of L’Oréal Polska. The conclusions from the research confirm the existence of numerous profits related to the implementation of CSR initiatives undertaken by the company. Considering own actions in a forward-looking way and taking responsibility for them shows that CSR is a bridge between the present and the future of business. Therefore, the further development of this concept can be forecasted.

scholarly journals Traditional Brands vs. On-Line Brands: A Comparative Assessment

2011 ◽  
Vol 2 (10) ◽  
Author(s):  
Elizabeth Aderton ◽  
Shiva Nandan
Keyword(s):  
Comparative Assessment ◽  
Font Size ◽  
Technological Environment ◽  
Branding Strategies ◽  
The Future ◽  
On Line ◽  
Similarities And Differences ◽  
Compare And Contrast

<p class="MsoNormal" style="text-align: justify; margin: 0in 0.5in 0pt;"><span style="font-size: 10pt; mso-bidi-font-style: italic; mso-bidi-font-size: 12.0pt;"><span style="font-family: Times New Roman;">In this paper we compare and contrast the branding strategies of traditional and on-line companies. To illustrate the similarities and differences between the two, we examine four well-established traditional brands and four successful on-line brands.<span style="mso-spacerun: yes;">&nbsp; </span>We then offer recommendations for successful branding in the ever-evolving business and technological environment of the future.</span></span></p>

Evaluation of AMB Turbomachinery Auxiliary Bearings

1999 ◽  
Vol 121 (2) ◽  
pp. 156-161 ◽  
Author(s):  
R. G. Kirk
Keyword(s):  
Transient Response ◽  
Analytical Techniques ◽  
Contact Forces ◽  
Active Magnetic Bearings ◽  
Low Loss ◽  
The Past ◽  
Compressor Rotor ◽  
Auxiliary Bearing ◽  
On Line ◽  
Proper Design

The use of active magnetic bearings (AMB) for turbomachinery has experienced substantial growth during the past two decades. The advantages for many applications make AMB’s a very attractive solution for potentially low loss and efficient support for both radial and thrust loads. New machinery must be shop tested prior to shipment to the field for installation on-line. For AMB turbomachinery, one additional test is the operation of the auxiliary drop or overload bearings. A major concern is ability of the selected auxiliary bearing to withstand the contact forces following an at speed rotor drop. The proper design of AMB machinery requires the calculation of the anticipated loading for the auxiliary bearings. Analytical techniques to predict the rotor transient response are reviewed. Results of transient response evaluation of a full-size compressor rotor are presented to illustrate some of the important parameters in the design for rotor drop.

An Evaluation of the Kenz Calorie Counter during Progressive Treadmill Exercise in Adults and Children

1996 ◽  
Vol 8 (2) ◽  
pp. 156-165 ◽  
Author(s):  
Nicholas J. Walters ◽  
David A. Brodie
Keyword(s):  
Linear Regression ◽  
Energy Expenditure ◽  
Body Mass ◽  
Correction Factor ◽  
Treadmill Exercise ◽  
Gas Analysis ◽  
Age Group ◽  
Measured Energy ◽  
Adults And Children ◽  
On Line

The purpose of this study was to assess the validity of data derived from the Kenz calorie counter during progressive, incremental treadmill exercise. Direct comparisons were made with calories calculated from on-line gas analysis. The subjects were 18 adults, 18 postadolescent children, and 24 preadolescent children. Linear regression (r2 > .95) showed a progressive deviation away from a 1:1 relationship between Kenz data and V̇O2 data with increasing age of subject which remained when standardized to kcal · kg−1 body mass or kcal · m−2 · hour−1. The Kenz calorie counter, after applying an age group correction factor, can thus be used as a suitable analog for measured energy expenditure.

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