2,919 Works

The intervention design and analysis scorecard: a business decision-making tool for participatory design of integrated health an

Michelle M. ROBERTSON, Robert HENNING, Nicholas WARREN, Suzanne NOBREGA, Megan DOVE-STEINKAMP, Andrea BIZARRO & The CPH-NEW Research Team
Using a participatory ergonomics framework, the Intervention Design and Analysis Scorecard (IDEAS) was developed and tested for engaging front-line employees in the design of integrated safety and health interventions. The IDEAS provides a stepwise approach for developing intervention proposals and was tested at four diverse worksites with trained facilitators. Employees were able to develop and gain management support for integrated interventions at each worksite.

Evidence on dynamic effects in the water content - water potential relation of building materials

Gregor Scheffler, Rudolf Plagge & Gregor Scheffler
Hygrothermal simulation has become a widely applied tool for the design and assessment of building structures under possible indoor and outdoor climatic conditions. One of the most important prerequisites of such simulations is reliable material data. Different approaches exist here to derive the required material functions, i.e. the moisture storage characteristic and the liquid water conductivity, from measured basic properties. The current state of the art in material modelling as well as the corresponding transport...

Practical measurement of stormwater events \342\200\223 Not a trivial task

T. Mietzel, T. Frehmann, R. Kutzner, M. Becker & W.F. Geiger
Setting up and maintaining monitoring stations is a common, but not trivial task for engineers working in the field of urban water management. Especially when faced with this task for the first time, it is difficult to find applied literature that gives answers to common problems with measuring equipment. The experience gathered during three major studies at stormwater treatment facilities, is summarized in this paper. The measuring included level measurement and flow measurement with different...

A comparison of strategies to encourage regular study and foster deep learning

Sylvie Dore
Three strategies were devised to encourage regular study and foster deep learning. Students were: 1.asked to draw a map of the course material that was to be covered in the coming week; 2.asked to produce an individual map of the material covered the previous week; 3.given the choice between drawing a map, writing a summary or attending a 10 minute quiz given at the beginning of the lecture, all on the material covered the previous...

Assessment of extraneous water inflow in separated sewer networks

C. Karpf & P. Krebs
Separate sewer systems provide due to the separate transport and treatment of waste water and rain water an efficient sewerage technology. But the advantage compared to combined system technology gets lost if the input of extraneous water exceeds the capacity of the system. Especially the input of rainwater into the waste water pipes depending on the drained area is responsible for an overload of the sewer system and the wastewater treatment plant (WWTP). In the...

SPIRIT: Towards an interactive tool for predictive asset management of sewer systems

A.S. Beenen, H. Vis, P. J. Van Gestel & A. Rabenort
SPIRIT is an interactive tool for predictive asset management. SPIRIT is a software plug-in for sewer management packages that uploads the actual state and environmental factors to a central databaseon the Internet. SPRIT downloads the prediction of the sewer condition in 5 respectively 10 years from the uploaded actual state. This interactivity improves the model by a self learning proces and results in a typical win-win situation. The RIONED Foundation is the national not-for-profit knowledge...

Reducing detention volumes with improved outlet structure

B. P. Tullis, E. C. Olsen & K. Gardner
Detention basin outlet flow control structures typically include a weir, orifice, and/or culvert. One disadvantage of these types of control structures is that the flow rate continually varies with the water level in the detention basin. The corresponding outflow hydrographs for such control structures are typically bell shaped, with the maximum allowable peak flow duration lasting only a \342\200\234moment\342\200\235 at the point where the rising leg of the hydrograph transitions to the falling leg of...

CDIO as the educational and cultural structuring element in the DTU B.Eng. in Electronics education

Claus Kjaergaard, Peter Brauer & Jens Christian Andersen
The aim of this paper is to describe how a CDIO based four semester study can be documented in such a way that a homogeneous quality can be maintained over time. Also when teaching staff changes, the purpose is to help new teachers to fully understand their role and obligations, not only in their particular course, but also as a part of the complex CDIO based education. A master document has been developed to document...

Dynamic modeling of detention tanks for flood control in urban drainage systems in developing countries

P. Sreeja, K. Gupta & O. Mark
ABSTRACT Increasing urbanization and high population density have resulted in an increase in the impervious areas in the cities. This results in flooding and overloading of existing drainage systems. Implementing structural measures for controlling urban flooding are extremely difficult due to the space constraints in densely populated cities in developing countries. An alternative cost effective solution can be achieved by implementing a control strategy for the existing control structures at different locations in the drainage...

Jagten på offentlige data

Brodersen, Peter

Advanced stormwater runoff characterization

M. Kayhanian
During the past seven years the California Department of Transportation has developed an extensive stormwater characterization program to evaluate the physical, chemical and biological quality of the runoff from their representative facilities. Initially the program has utilized many laboratories and environmental consultants who may not have necessarily used the same method of sample collection, quality assurance and quality control, data reporting and data validation standards. Faced with this deficiency, a set of standard protocols and...

Aqueous Electrolytes Model Parameters and Process Simulation

Kaj Thomsen

Electrolyte Solutions: Thermodynamics, Crystallization, Separation methods

Kaj Thomsen

The DeRisk Database

Fabio Pierella, Ole Lindberg, Henrik Bredmose, Harry B. Bingham, Robert Read & Allan Peter Engsig-Karup
The DeRisk database is an extensive database of long-crested (2D) nonlinear wave kinematics for computation of extreme loads on offshore structures.

The database was produced by running the nonlinear potential flow model OceanWave3D [1] on a gently sloping domain. The performed computations spanned a large parameter space, defined by nondimensional water depth, significant wave height and spectral peak period. A work containing a thorough description and validation of the current computations and of the database concept...

The DeRisk Database

Fabio Pierella, Ole Lindberg, Henrik Bredmose, Harry B. Bingham, Robert Read & Allan Peter Engsig-Karup
The DeRisk database is an extensive database of long-crested (2D) nonlinear wave kinematics for computation of extreme loads on offshore structures.

The database was produced by running the nonlinear potential flow model OceanWave3D [1] on a gently sloping domain. The performed computations spanned a large parameter space, defined by nondimensional water depth, significant wave height and spectral peak period. A work containing a thorough description and validation of the current computations and of the database concept...

The effect of climate change on urban drainage: An evaluation based on regional climate model simulations

M.Grum, A. T. J\303\270rgensen, R. M. Johansen & J. J. Linde
That we are in a period of extraordinary rates of climate change is today evident. These climate changes are likely to impact local weather conditions with direct impacts on precipitation patterns and urban drainage. In resent years several studies have focused on revealing the nature, extent and consequences of climate change on urban drainage and urban runoff pollution issues. This study uses predictions from a regional climate model to look at the effects of climate...

New Act Legislated in Japan for Well-balanced Hydrological System and Urban Inundation Prevention

A. Okashita & K. Ogata
This paper presents the new act legislated in Japan for well-balanced hydrological system and urban inundation prevention. The comprehensive mitigation measures for flood control have been carried out by the government for nearly 30 years. Since it does not have a legal basis to stand on, there is a limitation to implement the measures on a mandatory basis. In order to supplement this disadvantage, the new act was constituted to bridge the existing laws such...

MagTense

Rasmus Bjørk & Kaspar Kirstein Nielsen

Sail Milling

Reinert, S. , Iversen, N. H. , Pedersen, S. D. , Hølmkjær, E. C. M. , Johannesen, J. R. , Christensen, A. R. , Andersen, T. B. & Juul-Nyholm, H. B.

Assessment of runoff contributing catchment areas in rainfall runoff modelling

S. Thorndahl, C. Johansen & K. Schaarup-Jensen
In numerical modelling of rainfall caused runoff in urban sewer systems an essential parameter is the hydrological reduction factor which defines the percentage of the impervious area contributing to the surface flow towards the sewer. As the hydrological processes during a rainfall are difficult to determine with significant precision the hydrological reduction factor is implemented to account all hydrological losses except the initial loss. This paper presents an inconsistency between calculations of the hydrological reduction...

The DTU Strategy Implementer Workbook

Josef Oehmen, Diana Velasco, Line Christiane Lund Strøm & Pelle Lundquist Willumsen
The Strategy Implementer - a workbook for mastering people and uncertainty in implementing strategy initiatives.

The integrated unit process design approach for source control and best management practice design

M.M. Quigley, E.W. Strecker, M. Leisenring, W.C. Huber, J. Heaney, N. Weinstein, J. Sansalone & D. Bodine
Research being conducted by the authors under the National Cooperative Highway Research Program project \342\200\234Evaluation of Best Management Practices for Highway Runoff Control\342\200\235 and the Water Environment Research Foundation project \342\200\234Critical Assessment of Stormwater Treatment and Control Selection Issues\342\200\234 seeks to advance the state of the practice of stormwater design through the application of basic scientifically and technically sound engineering principals using a fundamental unit process design methodology. The research findings are being incorporated into...

ALEX17 surface flux measurements: gradient turbulent fluxes over complex terrain

Belén Martí, Daniel Martínez-Villagrasa & Joan Cuxart
The present dataset is part of the Alaiz Experiment-2017 (ALEX17) which consists of measurements of nine surface-layer stations (SLS) distributed over the Elorz valley bottom and mountain slopes (geographical coordinates are indicated in the experimental report). The stations were deployed in several phases along Autumn 2017 and Spring 2018 and were in operation until December 2018, providing 8 months of measurements from the entire SLS network. These 2-m high stations monitor both atmospheric and soil...

Health care manager’s views on and approaches to implementing models for care processes

Jörgen ANDREASSON, Andrea ERIKSSON & Lotta DELLVE

An optimal switching mechanism for a combined Picard- Newton method for the solution of Richards´equation

Javier Aparicio, Álvaro Aldama, Claudio Paniconi, Mario Putti & Javier Aparicio
Richards’ equation, describing flow in partially saturated porous media, contains strong nonlinearities arising from pressure head dependencies in soil moisture and hydraulic conductivity. Additionally, the time- dependent nature of boundary conditions can alter the nonlinear characteristics of equation during a transient simulation. Various iterative methods are used for solving this nonlinear equation, most commonly the quadratically convergent Newton – Raphson technique and the simpler but only linearly convergent Picard method (successive approximation). The initial solution...

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