Diagnosis of pipe systems by the SLE: first results

2013 ◽  
Vol 13 (4) ◽  
pp. 958-965 ◽  
Author(s):  
Christian Massari ◽  
Tian-Chyi J. Yeh ◽  
Marco Ferrante ◽  
Bruno Brunone ◽  
Silvia Meniconi
Keyword(s):  
Linear Estimator ◽  
Groundwater Hydrology ◽  
Theoretical Formulation ◽  
Pipe System ◽  
System Diagnosis ◽  
First Results ◽  
Unbiased Estimates ◽  
Pipe Systems ◽  
Numerical Case Study

In this study, an algorithm is presented for pipe system diagnosis. The algorithm is the Successive Linear Estimator (SLE) previously used in groundwater hydrology to estimate the hydraulic proprieties of soils. The SLE is an iterative cokriging-like technique which provides statistically the best unbiased estimates and quantifies the associated uncertainty. In this paper the algorithm has been extended to the pipe system diagnosis to infer leak areas, status of valves and partial blockage location and extent. We first present the theoretical formulation of the algorithm and then test it by a numerical case study.

scholarly journals Detection and sizing of extended partial blockages in pipelines by means of a stochastic successive linear estimator

2013 ◽  
Vol 16 (2) ◽  
pp. 248-258 ◽  
Author(s):  
Christian Massari ◽  
Tian Chyi J. Yeh ◽  
Marco Ferrante ◽  
Bruno Brunone ◽  
Silvia Meniconi
Keyword(s):  
Water System ◽  
Diameter Distribution ◽  
Linear Estimator ◽  
System Management ◽  
Pipeline System ◽  
Theoretical Formulation ◽  
Current State ◽  
Water Pipeline ◽  
Numerical Case Study

Effective water system management depends upon knowledge of the current state of a water pipeline system network. For example, in many cases, partial blockages in a water pipeline system are a source of inefficiencies, and result in an increase of pumping costs. These anomalies must be detected and corrected as early as possible. In this study, an algorithm is developed for detecting blockages by means of pressure transient measurements and estimating the diameter distribution resulting from their formation. The algorithm is a stochastic successive linear estimator that provides statistically the best unbiased estimate of diameter distribution due to partial blockages and quantifies the uncertainty associated with these estimates. We first present the theoretical formulation of the algorithm and then test it with a numerical case study.

scholarly journals Relining of pipe systems: conditions, benefits and application through case-study

2017 ◽  
Vol 19 (1) ◽  
pp. 7-14
Author(s):  
Victor Vladimirov ◽  
Thomas Simoner ◽  
Ioan Bica
Keyword(s):  
Urban Agglomerations ◽  
Pipe System ◽  
Diameter Pipe ◽  
Pipe Systems ◽  
The City

Abstract Relining is one of the best alternatives available today for pipe system rehabilitation. This trenchless solution is particularly interesting for urban agglomerations, as a smaller diameter pipe is pushed or pulled through the old pipeline. Relining creates a leak-tight “pipe within a pipe” system, which is as good as new in both structural and hydraulic terms. Relining can be performed with both circular and special, non-circular (NC) profiles. The latter is especially advantageous for the rehabilitation of old sewers, many of which were constructed in a variety of ovoid-like shapes. This paper presents the typical steps that are performed for pipeline rehabilitation with non-circular profiles, as well as an applied case study (a project implemented in the city of Würzburg in Germany).

scholarly journals Construction of All-Wood Trusses with Plywood Nodes and Wooden Pegs: A Strategy towards Resource-Efficient Timber Construction

2021 ◽  
Vol 11 (6) ◽  
pp. 2568
Author(s):  
Benjamin Kromoser ◽  
Matthias Braun ◽  
Maximilian Ortner
Keyword(s):  
Environmental Impact ◽  
Parametric Design ◽  
Gusset Plates ◽  
Research Areas ◽  
Timber Construction ◽  
First Results ◽  
Building Components ◽  
Numerical Optimisation ◽  
Special Case

Timber truss systems are very efficient load-bearing structures. They allow for great freedom in design and are characterised by high material use in combination with a low environmental impact. Unfortunately, the extensive effort in design and production have made the manufacturing and application of these structures, in this day and age, a rarity. In addition, the currently mainly used steel gusset plates adversely affect the costs and environmental impact of the trusses. The authors’ goals are to optimise the design of timber trusses and to solely use wood for all building components. The two research areas, (1) optimisation of the truss geometry and (2) optimisation of the joints by using solely wood–wood connections, are addressed in this paper. The numerical optimisation strategy is based on a parametric design of the truss and the use of a genetic solver for the optimisation regarding minimal material consumption. Furthermore, first results of the tensile and compression behaviour of the chosen wood–wood connections are presented. The basic idea for the joints is to use a plywood plate as a connector, which is inserted into the truss members and fixed with wooden pegs. The housing of the new robot laboratory located at BOKU Vienna is considered a special case study for the research and serves as an accompanying example for the application of the research within the present paper.

Understanding and forecasting taste-and-odour formation in a drinking water distribution system: case study of Lyon (France)

2009 ◽  
Vol 9 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Elise Corbi ◽  
Valérie Jacquemet ◽  
Alain Quendo ◽  
Francine Manciot ◽  
Adeline Lamy ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Distribution Network ◽  
Drinking Water Distribution ◽  
First Results ◽  
Mechanisms Of Formation

Lyon, France has the opportunity to distribute in abundance a groundwater resource with a good quality for drinking water. However, the length and the complexity of the distribution network can lead to consumer complaints in some areas of the water distribution system. In order to improve the organoleptic quality of distributed water, the water supplier wants to get a better understanding of potential taste and odour formation and to succeed in controlling it. Since 2006, activities have been taken with targeted analyses and sensory evaluation of water, taking into account both the consumers' private networks and the citywide distribution network. The first results were focused on the occurrence of bromophenols along the water distribution system, the understanding of the mechanisms of formation of such compounds, as well as their incidence on taste-and-odour events at the consumer's home.

scholarly journals The Case Study of the Medieval Town Walls of Gubbio in Italy: First Results on the Characterization of Mortars and Binders

Heritage ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 468-478 ◽  
Author(s):  
Fernanda Carvalho ◽  
Andreia Lopes ◽  
Antonella Curulli ◽  
Teresa da Silva ◽  
Maria Lima ◽  
...  
Keyword(s):  
Polarized Light ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heritage Sites ◽  
First Results ◽  
Restoration Practices ◽  
Climate Events

Good conservation and restoration practices of cultural heritage assets rely on the knowledge of original materials. In the framework of the HERACLES Project (HERACLES—HEritage Resilience Against CLimate Events on Site, H2020 Grant Agreement 700395), dealing with the effects of climatic actions and natural hazards on built heritage, a set of important heritage sites are currently under study to improve their resilience against climate events. Among these are the medieval Gubbio Town Walls in Italy. The present work focuses on the mortars and binders of this monument and collected samples related to different parts of the Walls, corresponding to various historical periods of construction and interventions. They were characterized to determine their minerochemical composition, thermal behavior, and morphology. For that purpose, ex-situ laboratory techniques, such as X-ray diffraction (XRD), wavelength dispersive X-ray fluorescence (WDXRF), optical microscopy (OM), polarized light microscopy (PLM), scanning electron microscopy (SEM), and simultaneous differential thermal analysis and thermogravimetry (TG-DTA) were used to discern trends in different sampling areas due to construction/reconstruction periods and building techniques.

scholarly journals A time-of-use based electricity price package mechanism in retail market considering consumers’ diversity

2020 ◽  
Vol 182 ◽  
pp. 02009
Author(s):  
Gang Luo ◽  
Yujun He ◽  
Chen Zhao ◽  
Xuan Zhang ◽  
Shaohua Lin ◽  
...  
Keyword(s):  
Energy Demand ◽  
Electricity Price ◽  
Demand Elasticity ◽  
Energy Price ◽  
Retail Market ◽  
Specific Time ◽  
Optimal Price ◽  
Numerical Case Study

In the deregulated retail market, consumers should have more right of choice for paying for their energy demand. This paper focuses on the design of electricity price package mechanism in retail market considering the demand elasticity of consumers. An optimal price package mechanism is proposed to incentivize consumers for peak-clipping/valley-filling. Consumers are able to choose the appropriate one from a set of price packages, each of which consists of specific time-of-use energy price and maximum-demand price. A numerical case study has shown the usefulness and effectiveness of the proposed mechanism.

scholarly journals Spectral analysis of multiple cracked beam subjected to moving load

2014 ◽  
Vol 36 (4) ◽  
pp. 245-254
Author(s):  
N. T. Khiem ◽  
P. T. Hang
Keyword(s):  
Dynamic Response ◽  
Moving Load ◽  
Time History ◽  
Theoretical Development ◽  
Multiple Cracks ◽  
Spectral Approach ◽  
Cracked Beam ◽  
Time History Response ◽  
Numerical Case Study

In present paper, the spectral approach is proposed for analysis of multiple cracked beam subjected to general moving load that allows us to obtain explicitly dynamic response of the beam in frequency domain. The obtained frequency response is straightforward to calculate time history response by using the FFT algorithm and provides a novel tool to investigate effect of position and depth of multiple cracks on the dynamic response. The analysis is important to develop the spectral method for identification of multiple cracked beam by using its response to moving load. The theoretical development is illustrated and validated by numerical case study.

scholarly journals Re-Inhabiting Inner Areas Triggering New Regeneration Trajectories: The Case Study of Sicani in Sicily

2022 ◽  
Vol 14 (2) ◽  
pp. 976
Author(s):  
Barbara Lino ◽  
Annalisa Contato ◽  
Mauro Ferrante ◽  
Giovanni Frazzica ◽  
Luciana Macaluso ◽  
...  
Keyword(s):  
National Interest ◽  
Work Life ◽  
Research Project ◽  
Sustainable Lifestyles ◽  
First Results ◽  
Peripheral Areas ◽  
The University ◽  
Qualitative Analyses

The Italian debate on the so-called ‘inner areas’ has received a much-needed boost, following the COVID-19 pandemic, which has further highlighted the differences between metropolitan and inner areas. While the progressive depopulation of inner areas is a worrying phenomenon, the limits of incessant urbanisation and the concentration of settlement and infrastructure policies in large conurbations have become evident. Departing from the framework of the B4R-Branding4Resilience research project of national interest and, by continuing in the furrow initiated by the SNAI, but also surpassing it, the aim of the University of Palermo’s research is to define the requirement for a more inclusive settlement model in the Sicani area in Sicily (Italy) to re-balance existing asymmetries by recharging peripheral areas with new centrality. The aims of the research are to demonstrate that inner areas could be an engine for innovation, thereby outlining a roadmap through which to encourage the resilience of new sustainable lifestyles. These aims would be achieved by working on new perspectives and projects, which are capable of radically modifying production, consumption, and tourism dynamics and work/life models, and which are gleaned from a study regarding the Sicani area in Sicily. The paper discusses case study quantitative and qualitative analyses and first results.

At the Dawn of Swiss E-Government: Planning and Use of a Unique Identifier in the Public Administration in the 1970s

2018 ◽  
Vol 50 (9) ◽  
pp. 1319-1334 ◽  
Author(s):  
Jérôme Brugger
Keyword(s):  
Public Administration ◽  
Information And Communications Technology ◽  
Unique Identifier ◽  
The Public ◽  
Ict Use ◽  
Use Of Resources ◽  
Interagency Cooperation ◽  
First Results ◽  
Government Planning

The article explores some of the conceptual discussions on information and communications technology (ICT) use in public administration in the 1970s. Based on ICT-maturity models, the interagency cooperation plans and their failed implementation are analyzed. This case study focuses on the discussions on the utilization of a unique identifier in Swiss public administration and describes the key concepts as well as the actual developments in this specific case. While the chosen approaches for shared use of resources encountered cultural and organizational limitations along with technical difficulties, new organizational practices for coordination and standardization were created and showed first results.

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