PROGRAM
2006
IASME / WSEAS International Conference on
ENERGY & ENVIRONMENTAL SYSTEMS (EE'06)
Chalkida, Evia Island, Greece
co-organized by WSEAS and Technological Educational Institute of Chalkida
Sponsored by WSEAS and WSEAS Transactions
May 8-10, 2006
Monday, May 8, 2006
Welcome Speech
Professor K. Kouroubas
President of the Technological Educational Institution of Chalkida
Plenary Lecture I
Fluid Mechanics in Energy Preserving and Environmental Issues
Assistant Professor Dionisis Margaris
University of Patras, Greece
SESSION: Environmental Pollution and Protection Methods
Chair: D. M. Papamichail, Maria Sakellariou-Makrantonaki
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Daily Reservoir Inflow Forecasting using Time Delay Artificial Neural Network Models |
M. J. Diamantopoulou, P. E. Georgiou, D. M. Papamichail |
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In the Search of Sustainable Building Pattern |
Luka Mladenovic, Tina Krope, Darko Goricanec |
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New Environmentally Friendly Methods and Materials in Surface Treatment |
D. K. Yfantis, A. Yfantis, S. Lamprakopoulos, S. Depountis, C. Yfantis, D. Schmeisser |
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A Comparison of Indoor Air Quality in two Buildings of Different Construction |
Rea Loupa |
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The use of Catalytic Reforming Reactions for CO2 Sequestration as Carbon Nanotubes |
Nicolas Abatzoglou, Jasmin Blanchard, Hicham Oudghiri-Hassani, Sepideh Jankhah, Francois Gitzhofer |
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The Application of Synchronous Averaging to Renewable Energy Systems |
Alasdair Macleod |
SESSION: Energetic Aspects of Environmental Systems I
Chair: Maria Koukou, D. M. Papamichail
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Study on Fuzzy Models of Wind Turbine Power Curve |
Shu-Chen Wang, Pei-Hwa Huang, Chi-Jui Wu |
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Experimental Evaluation of the Performance of Reflective Insulation for Improvement of Indoor Thermal Environmental Conditions |
M. G. Vrachopoulos, M. K. Koukou, G. Kotsiovelos, E. Kravvaritis, P. Ioannidou |
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Numerical Prediction of the Flow Field Produced by a Laboratory-Scale Combustor: A Preliminary Isothermal Investigation |
A. Hatziapostolou, K. Krallis, N. G. Orfanoudakis, M. K. Koukou, D. Chatzifotis, G. Raptis |
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Potential and Water-Limited Growth and Productivity of Fiber Sorghum in Centralgreece Irrigated by Surface and Subsurfacedrip Methods on a Rainy and a Dry Year |
M. Sakellariou-Makrantonaki, D. Papalexis, N. Nakos, S. Dassios, A. Chatzinikos, N. Papanikos, N. Danalatos |
SESSION: Energetic Aspects of Environmental Systems II
Chair: Maria Koukou, Alexander Rentschler
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Energetic Aspects Referring to Servo Drive Systems |
Corneliu Botan, Florin Ostafi, Vasile Horga |
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Improving Energy Efficiency in Greenhouse Industry |
Lucio Ippolito, Antonio La Cortiglia, Michele Petrocelli |
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Sustainable Masonry Building-Shell Design of Byzantine Monuments in Greece for Energy Efficient Constructions |
Thomas D. Xenos |
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Sustainable Energy and Economic Evaluation in Stand-Alone Photovoltaic System |
Sonia Leva, Dario Zaninelli |
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Modeling and Analysis of Parallel Connected Permanent Magnet Synchronous Generators in a Small Hydropower Plant |
N. Gautam, A. Rentschler, T. Schneider, A. Binder |
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Run In and Usage of a Solar Assisted Heat Pump System |
M. Heppelmann, B. Bitzer, D. Morton, G. S. Virk |
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Experimental and Theoretical Investigation of a Capillary Pumped Loop |
D. P. Margaris, Z. G. Diamantis, D. I. Photeinos, D. T. Tsahalis |
Tuesday, May 9, 2006
Plenary Lecture II
Air Quality Current Understanding
Professor P. Demokritou
Harvard University, USA
SESSION:
Heat Transfer and Thermal Exchange Analysis
Chair: Alexander Rentschler, Mohamed Fahim Hassan
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Study of Air Adjustment Effect in Power Plant Burners and Hazards of its Nonadjustment |
Ebrahim Mussavi, Ali Rafiei, Ehsan Allah Saadati, Nima Fathi |
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Steady State Stress Analysis and Heat Transfer Analysis on an Axial Flow Gas Turbine Blades and Disk |
Sukhvinder Kaur Bhatti, Shyamala Kumari, V. Chaitanya, Kedarinath, I. N. Niranjan Kumar |
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Optimization of Combined Solar Heating through Control Decisions |
Nikolaos Taoussanidis |
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Distributed co-Generation Plants as Balancing Energy Supply |
Eva Marie Linne, Wolfgang Schufft |
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Modeling of Thermal Exchange in Enclosed Cavity |
Abdelhadi Beghidja, Hamza Gouidmi, Razik Benderradji, El Haj Rouache |
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Design of Genetic Algorithm Based Power System Damping Controller |
Manisha Dubey, Nikos E. Mastorakis |
SESSION: Power Systems and Control
Chair: Mohamed Fahim Hassan, Jiri Zdenek
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Application of RGA to Optimal Choice and Allocation of UPFC for Voltage Security Enhancement in Deregulated Power System |
A. Karami, M. Rashidinejad, A. A. Gharaveisi |
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Minimizing of the Communication Overhead in Distributed Control Computer of Power System using Correct Partition and DMA |
J. Zdenek |
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An Adaptive Control of Static Var Compensator on Power Systems |
N. Djagarov, Zh. Grozdev, M. Bonev, G. Georgiev |
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Application of UPFC-based Adaptive Controller for Damping Inter-Area Oscillations |
D. Nazarpour, S. H. Hosseini, G. B. Gharehpetian |
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A Partially Closed Loop Distributed Controller for Constrained Water Quality Control in Streams with Time-Delays |
Mohamed Fahim Hassan |
SESSION: Power System Analysis
Chair: Heiki Tammoja, Sameer Khader
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A New Digital Filter for Unbalance Distrorted Current and Voltage Estimation in Power Systems |
Wael M. Al-Hasawi, Khaled M. El-Naggar |
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Analysis of Sensorless Controlled Two Phase Brushless DC Motor |
Abdel-Karim Daud |
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Short-term Load Forecasting based on the Kalman Filter and the Neural-Fuzzy Network (ANFIS) |
Stelios A. Markoulakis, George S. Stavrakakis, Triantafyllia G. Nikolaou |
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Cooling System Optimization and Expected Lifetime of Large Power Transformers |
Tim Gradnik, Maja Koncan-Gradnik |
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Determination of the Sampling Period for a Fast Dynamic Response of DC-Motors |
J. A. Ga'eb |
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Proximity Effect on Bare Buried Conductors Connecting Together MV/LV Substations' Earth Electrodes |
Angelo Campoccia, Gaetano Zizzo |
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Optimal Load Dispatch in Power Plant under Uncertainty Information |
Heiki Tammoja, Mati Valdma, Matti Keel |
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Single Phase Brushless DC Motor with PWM Control Strategy and Special Form of PM Rotor |
Sameer H. Khader |
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Electrical Safety Requirements in DC Bus Systems |
Paul Vantichelen, Dominique Weyen |
SESSION: Power Systems Applications I
Chair:
Antonio Alexandridis, Dimitrios Tsanakas
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Preisach Hysteresis Modeling and Applications |
Aphrodite Ktena, Christos Manassis |
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Regulations for Protection against Electric and Magnetic Fields and Optimum Solution for the Development of 150KV Transmission Lines |
D. Tsanakas, E. Mimos, A. Tzinevrakis |
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Long-term Peak Load Forecast in the Greek Power System |
Petros Christodoulou, Pandelis Biskas, Michail Pazarskis, Manthos Vogiatzoglou |
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Primary Level and Secondary Level Coordinated Control of Power Systems |
E. A. Androulidakis, A. T. Alexandridis |
SESSION: Environmentally Friendly Solutions I
Chair: Antonio Alexandridis, N. J. Georgi
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Study of an Environmentally Friendly Antifouling Coating for Fish Cage Nets |
S. Depountis, S. Lamprakopoulos, N. Yfantis, D. K. Yfantis |
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Comparison of Different Turbulent Models for Predicting Flow of Closed Spaces |
K. Papakonstantinou, C. Kiranoudis, N. Markatos |
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Preliminary Remarks on Socio-Economic Impacts of Biofuel Production and use in Europe |
Mladen Stanojevic, Sanja Vranes, Iskender Gokalp |
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Concepts, Tools, and Procedures Necessary to Implement Irrigation Management in Urban Green Areas |
J. E. Stathakopoulos, N. J. Georgi, D. H. Pelagos |
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Chemical Recycling of Polymers. The case of poly(mehyl methacrylate) |
Dimitris S. Achilias |
Wednesday, May 10, 2006
Plenary Lecture III
The concept of Energy
Professor Panayotis Razelos
Columbia University, USA
SESSION: Theoretical Approaches on Energy Systems
Chair: Jurij Krope, John Gelegenis, John Kaldellis
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The Roles of the System Operators and the Regulatory Authorities in the First Years of Liberalized EU Natural Gas Market |
Tina Krope, Marko Sencar, Jurij Krope |
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Autonomous Induction Generator Voltage Control |
Vasile Horga, Mihai Albu, Marcel Ratoi, Corneliu Botan |
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Estimating the Wind Energy Rejection by the Crete Island Electrical Network during the Next Decade |
J. K. Kaldellis, K. A. Kavadias, E. M. Kondili |
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Numerical Investigation of the Buoyancy-Induced Flow Field and Heat Transfer inside Solar Chimneys |
E. Bacharoudis, M. G. Vrachopoulos, M. K. Koukou, A. E. Filios |
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A Neuro-fuzzy Approach to Forecast the Electricity Demand |
Camelia Ucenic, George Atsalakis |
SESSION: Environmentally Friendly Solutions II
Chair: John Kaldellis, John Gelegenis, M. Gr. Vrachopoulos
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Energy Evaluation of Anaerobic Digesters |
John Gelegenis, Petros Axaopoulos, Maria Samarakou, Panagiotis Tsilingiris |
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A Methodology for the Estimation of the Thermal and Cooling Loads of Urban Areas |
M. G. Vrachopoulos, A. E. Filios, A. Fatsis, G. T. Kotsiovelos |
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European Integration and Transboundary Transfer of Air Pollution: Analyzing the Case of Nitrogen Oxides |
K. J. Chalvatzis, G. C. Spyropoulos, J. K. Kaldellis |
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Environmental Management Systems in Greek Industry |
Zefi Dimadama |
SESSION: Power Systems Applications II
Chair: Athanasios Maglaras, John Gelegenis
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Spark Discharge Characteristics of Various SF6-Based Binary Gases in Non-Uniform Field |
D. H. Rhie, H. J. Seo |
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Detection Methods of the Faulty Porcelain Insulators |
Li Li-Xue, Jiang Xiu-Chen |
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Fault Location in Distribution Feeders with Distributed Generation using Positive Sequence Apparent Impedance |
Arturo Bretas, Rodrigo Salim |
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The Phenomenon of Ground Effect in Contradiction to the Polarity Effect in Rod Plate Air Gaps |
Athanasios Maglaras, Leandros Maglaras |
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Distance Protection Settings in Electrical Railway Systems with Positive and Negative Feeder |
R. Krebs, M. R. Ganjavi, Z. Styczynski |
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Design and Implementation of a Primary Digital Relay |
Yazdan Ashgevari, Iraj Hassanzadeh, Alireza Maleki, Mehrdad Mehrpoor |
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Development of an Overall Condition Monitoring System of High Voltage SF6 Circuit Breaker |
Yue Dong, Dengming Xiao |
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Development of Relay Protection Equipment in Substations |
Ranran Lin |
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In Orbit Performance of LEO Satellite Electrical Power Subsystem - SW Package for Modelling and Simulation Based on MatLab.7 GUI |
M. Zahran |
SESSION: Cost Analysis and Statistic Evaluation of the Power Market
Chair: Jurij Krope, Juhan Valtin
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Liberalising the Electrical Power Market in Slovenia |
Vilijem Pozeb, Tina Krope, Darko Goricanec |
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A Method of Spot Price Bidding in Day-Ahead Power Market with the Consideration of Power Shortage Factor |
Chen Yuchen, Cao Minnian, Hou Zhijian |
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Cost Allocations of Transmission Network by Cooperative Game Theory; Nucleolus method |
Maria J. Reveco, Juan Zolezzi C., Hugh Rudnick V. |
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Evaluation of Onsite Generation Introduction for Improving Reliability on the Customer Side |
Satoru Niioka, Seiichi Itakura, Ryuichi Yokoyama |
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Assessment of Electricity Supply Interruption Costs under Restricted Time and Information Resources |
P. Raesaar, E. Tiigimagi, J. Valtin |
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Transient Overvoltages and Risk of Failure Assessment of Kuwait EHV Network: A Statistical Perspective |
W. M. Al-Hasawi, N. H. Abbasy |
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Transesterification of Sunflower Seed Oil for the Production of Biodiesel: Effect of Catalyst Concentration and Ultrasonication |
K. G. Georgogianni, M.G Kontominas, D. Avlonitis, V. Gergis |
SPECIAL SESSION: Environmental Health Effects of Chromium
Chair: Gurumurthy Vijayan Iyer
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Environmental Health Effects of Chromium - A Modeling Approach to Find Environmental Impacts |
Gurumurthy Vijayan Iyer, Nikos E. Mastorakis |
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Environmental Effects of Chrome Composite Leather-Clad Rollers Commonly Used by Cotton Roller Ginning Industries and Design and Development of Chromeless Rubberized Cotton Fabric Roller for Cotton Double Roller Ginning Machines |
Gurumurthy Vijayan Iyer, Nikos E. Mastorakis |
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Eco-Friendly Rubberized Cotton Fabric Roller Development For Cotton Roller Gins |
Gurumurthy Vijayan Iyer, Nikos E. Mastorakis |
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Environmental Management System for the Organization to Achieve Business Excellence |
Gurumurthy Vijayan Iyer, Nikos E. Mastorakis |
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Assessment of Pollution Load from Unsafe Chromium Leather Tanneries in India |
Gurumurthy Vijayan Iyer, Nikos E. Mastorakis |
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Some Practical Hints On Preservation of Aircraft Engines Using A Rig From Corrosion Problems |
Gurumurthy Vijayan Iyer |
PROGRAM
2006
IASME / WSEAS International Conference on
CONTINUUM MECHANICS (CM'06)
Chalkida, Evia Island, Greece
co-organized by WSEAS and Technological Educational Institute of Chalkida
Sponsored by WSEAS and WSEAS Transactions
May 11-13, 2006
Thursday, May 11, 2006
Plenary Lecture I
Mathematical modelling and simulation of blood circulation
Prof. Adelia Sequeira
Department of Mathematics and CEMAT/IST
Lisbon, Portugal
adelia.sequeira@math.ist.utl.pt
Abstract: Mathematical and numerical models together with computer simulations are playing an increasingly relevant role in biology and medicine. Applications to blood flow in the human circulatory system, in normal or pathological conditions are certainly one of the major mathematical challenges of the coming decades.
Relevant features have already been addressed but many fundamental issues have still to be fully understood. Blood is a multi-component mixture of plasma (Newtonian fluid), cells (elastic membranes filled with a Newtonian fluid), platelets (elastic solids) and other matter, like inorganic and organic salts, proteins and transported substances, that is homogenized and can be modeled as a single component fluid. Blood interacts both mechanically and chemically with vessel walls producing complex fluid-structure interactions whose mathematical analysis is still incomplete and which are practically impossible to simulate in its entirety.
In large and medium vessels, blood can be considered as a Navier-Stokes liquid, at a first level of approximation. However, blood can shear-thin considerably and also exhibits viscoelastic properties that cannot be neglected, at least in small arteries where the vessel diameters are comparable with the one of blood cells. In particular the high viscosity behaviour of blood at low shear rates is due to red blood cells aggregation (into rouleaux) and low viscosity at high shear rates is a consequence of deformability of red blood cells. Also stretching of the elastic red blood cells and their consequent storage of elastic energy account for the memory effects in blood.
In this talk we address some mathematical issues arising from the modelling of the cardiovascular system through problems of different complexity. Several reduced models have been developed which may give a reasonable approximation of averaged quantities, such as mean flow rate and pressure, in different sections of the cardiovascular system. They are, however, unable to provide the details often needed for understanding a local behaviour, such as the effect on the shear stress distribution due to a modification in the blood flow consequent to a partial vessel stenosis. In particular we will specifically consider the fluid-structure interaction problem of an incompressible generalized Newtonian shear-thinning fluid flowing inside a thin compliant vessel whose walls undergo small deformations under the action of the fluid. The numerical approach is based on a finite element method for the coupling of the fluid equations in a moving domain, described in an Arbitrary Lagrangian Eulerian (ALE) frame, with a simple structural model for the vessel wall. A review of various continuum (differential and rate type) constitutive models proposed for blood flow and their numerical simulations in different geometries will also be presented in this talk.
Plenary Lecture II
On the Mathematical Problems Arising from the Motion of a Viscous Fluid Around a Rotating Body
Professor Sarka Necasova
Mathematical Institute
Academy of Sciences
Prague, Czech Republic
Abstract: The motion of one or several rigid bodies in a viscous incompressible fluid has been a topic of numerous theoretical and numerical studies. Over the last 40 years the study of the motion of small particles in a viscous liquid has become one of the main focuses of the applied research. The presence of the particles affects the flow of the liquid, and in term, affects the motion of the particles, so that the problem of determining the flow characteristics is highly coupled. It is just the latter feature that makes any fundamental mathematical problem related to the liquid-particle interaction particularly challenging.
One of the mathematical aspects is the orientation of the particles in a viscous liquid. The orientation of long bodies in liquids of different nature is a fundamental issue in many problems of practical interest, for example, composite materials, separation of macromolecules of electrophoresis, ow induced microstructures. The second very interesting problem is the motion of a self-propelled body in a liquid. Typical examples are motions performed by birds, fish, rockets, submarines.
We would like to discuss the mathematical analysis of certain aspects of particle sedimentation. We assume that the liquid fills the whole space, in accordance with the fact that, as established by experiments: "wall effects" play no role on the preferred orientation of the particles. The mathematical analysis of particle sedimentation is based on the concept of free fall of a body B in a liquid L. To investigate the asymptotic behaviour of weak or strong solutions, the knowledge of the asymptotical structure of steady solutions is of the fundamental importance, and we will consider some properties of the linearized operators arising in this problem.
Plenary Lecture III
Flooding due to Sequential Dam Breaking
Professor C. D. Memos
School of Civil Engineering
National Technical University of Athens
GREECE
Abstract: The growing concern about the environmental impact due to eventual failure of civil engineering projects, encompasses cases where dam breaches can release enormous amount of water into natural watercourses. This could pose a serious threat to human life and property downstream of the failed dam. To assess the risk related to such situations a detailed description of the hydraulics of the resulting flood wave is required. However, in cases where more than one dams are present along the route of a watercourse, representation of the wave propagation is quite complex and realistic answers are difficult to be given by commercially available packages. Some of the complexities of the problem are discussed, especially those related to flood routing through a reservoir. Suggestions to overcome the difficulties are given along with a real life application to a Greek river with five dams constructed along its route.
SESSION: Applications and Computational Techniques on Continuum Mechanics
Chair: Nikolay Tutyshkin, Mihai Bugaru
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The Analysis of Stress and Velocity Fields In Axisymmetric Plastic Yielding Processes |
Nikolay Tutyshkin, Maxim Zapara |
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Theoretical Model of the Dynamic Interaction between Wagon Train and Continuous Rail |
Mihai Bugaru, Tudor Chereches, Eugen Trana, Sorin Gheorghian, Tiberiu Nicolae Homotescu |
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Noise Radiated by Vibrating Rectangular Plate |
Mihai Bugaru, Tudor Chereches, Eugen Trana, Sorin Gheorghian |
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Static Analysis of Gradient Elastic 3-D Solids with Surface Energy by BEM |
Katerina Tsepoura, Dimitrios Pavlou |
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Symbolic Computation of Generalized Transient Visco-Elastic Flow with Variable Viscosity inside a Movable Tube using Computer Algebra |
Juan Ospina, Mario Velez |
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Numerical Analysis of Vertical Water Impact of a Spherical Projectile |
M. Takaffoli, A. Yousefi Koma |
SESSION: Experimental Techniques on Continuum Mechanics
Chair: Nikolay Tutyshkin, Adelia Sequeira
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The Damping and the Dynamic Stability of Thin Plates Parametrically Excited |
Mihai Bugaru, Eugen Trana, Adrian Rotariu, Gheorghe Ichimoaie, Sorin G. Cartuta, Marius Banica |
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The Flow Through an Orifice of Semi-Rigid-Polymer Solutions |
George Papaevangelou |
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The Effect of Cold Rolling on the Creep Behavior of Udimet 188 |
Carl Boehlert |
Friday, May 12, 2006
MINISYMPOSIUM: Mathematical Fluid Mechanics and Related Problems I
Organizer / Chair: Sarka Necasova
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On the Weak Solution to the Oseen-Type Problem Arising from Flow Around a Rotating Rigid Body |
Stanislav Kracmar, Sarka Necasova, Patrick Penel |
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Remarks on the Oseen Problem in Exterior Domains - Anisotropically Weighted Approach |
Stanislav Kracmar, Sarka Necasova |
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Unsteady Flow of Oldroyd-B Fluids in an Uniform Rectilinear Pipe Using 1D Models |
Fernando Carapau, Adelia Sequeira |
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Stabilization Properties for a Spherical Model of Gaseous Star |
Bernard Ducomet, Alexander Zlotnik |
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On the Rheological Modeling of Blood Flow around the Clot |
Tomas Bodnar, Adelia Sequeira |
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Numerical Simulations of Second-Grade Fluids in Curved Pipes |
Nadir Arada, Paulo Correia, Adelia Sequeira |
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A Hyper-Viscosity Numerical Method for the Interaction of a Shear-Dependent Fluid with a Rigid Body |
Joao Janela, Adelia Sequeira, Fernando Carapau |
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A Comparative Numerical Study of a non-Newtonian Blood Flow Model |
Abdelmonim Artoli, Joao Janela, Adelia Sequeira |
MINISYMPOSIUM: Mathematical Fluid Mechanics and Related Problems II
Organizer / Chair: Sarka Necasova
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Numerical Simulation of an Oldroyd-B Fluid with a Preconditioned Domain Decomposition Method |
Nadir Arada, Luis Borges, Adelia Sequeira |
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The Flow in a Profile Cascade with Separate Boundary Conditions for Vorticity and Bernoulli’s Pressure on the Outflow |
Tomas Neustupa |
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Globally in Time Existence Theorem for the Navier-Stokes Flow in the Exterior of a Rotating Obstacle |
Toshiaki Hishida, Yoshihiro Shibata |
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Estimates of Optimal Accuracy for the Brezzi-Pitkaranta Approximation of the Navier-Stokes Problem |
Sergej A. Nazarov, Maria Specovius-Neugebauer |
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The Single-Layer Potential Associated with the Time-Dependent Oseen System |
Paul Deuring |
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On Asymptotic Behavior of Solutions of a Perturbed Non–Steady Stokes Equation in an Exterior Domain |
Jiri Neustupa |
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Stability of a Solution of the Navier–Stokes Equation in a Norm Induced by a Fractional Power of the Stokes Operator |
Petr Kucera, Jiri Neustupa |
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Pattern Formation and Thermal Convection of Newtonian and Viscoelastic Fluids |
Roger E. Khayat |
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The Role of Modes in Asymptotic Dynamics of Solutions to the Homogeneous Navier-Stokes Equations |
Zdenek Skalk |
Saturday, May 13, 2006
Plenary Lecture III
Warping and Shear Deformation Effects in Static and Dynamic Analysis of 3-D Beam Elements
Evangelos Sapountzakis
National Technical University of Athens
Zografou Campus
Athens, GREECE
Abstract: In this speech, the static and dynamic analysis of 3-D beam elements restrained at their edges by the most general linear torsional, transverse or longitudinal boundary conditions and subjected in arbitrarily distributed static or dynamic twisting, bending, transverse or longitudinal loading is presented. For the solution of the problem at hand, a boundary element method is employed for the construction of the 14x14 stiffness matrix and the corresponding nodal load vector of a member of arbitrary homogeneous or composite cross section taking into account both warping and shear deformation effects, which together with the respective mass and damping matrices lead to the formulation of the equation of motion. To account for shear deformations, the concept of shear deformation coefficients is used, defining these factors using a strain energy approach, instead of Timoshenko’s and Cowper’s definitions, for which several authors have pointed out that one obtains unsatisfactory results or definitions given by other researchers, for which these factors take negative values. Eight boundary value problems with respect to the variable along the bar angle of twist, to the primary warping function, to a fictitious function, to the beam transverse and longitudinal displacements and to two stress functions are formulated and solved employing a pure BEM approach, that is only boundary discretization is used. Numerical results are presented to illustrate the method and demonstrate its efficiency and accuracy. The influence of the warping effect especially in composite members of open form cross section is analyzed through examples demonstrating the importance of the inclusion of the warping degrees of freedom in the analysis of a space frame. Moreover, the discrepancy of both the deflections and the internal forces of a member of a spatial structure arising from the ignorance of the shear deformation effect necessitates the inclusion of this additional effect, especially in thick walled cross section members. Moreover, free and forced transverse, longitudinal or torsional vibrations are considered, taking also into account effects of transverse, longitudinal, rotatory, torsional and warping inertia and damping resistance.
SESSION: Theoretical Methods on Continuum Mechanics
Chair: Evangelos Sapountzakis, George D. Verros
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Influence of the Interface Forces to the Analysis of Beam Stiffened Plates |
Evangelos Sapountzakis, Vasilios Mokos |
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Escape Solutions of Two-Degree of Freedom Dynamical System of the Coupled Non-Linear Double Oscillator with Third Order Potential |
Evangelos P. Valaris, Maria A. Leftaki |
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The Effect of Geometric Imperfections on the Amplitude and Phase Angle of the Non-Linear Dynamic Behavior of Thin Rectangular Plates Parametrically Excited |
Mihai Bugaru, Tudor Chereches, Adrian Rotariu, Sorin Gheorghian, Victor Cojocari |
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The Navier-Stokes Equations with Lagrangian Differences |
Werner Varnhorn |
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On the Validity of Onsager’s Reciprocal Relations: I. Isothermal Diffusion |
George D. Verros |
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Properties of a Class of Continuum Damage Models |
Paschalis Grammenoudis, Charalampos Tsakmakis |
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Thermodynamical Modeling of Ferroelectric Polycrystalline Material Behavior |
Volkmar Mehling, Charalampos Tsakmakis, Dietmar Gross |
PROGRAM
2006
IASME / WSEAS International Conference on
WATER RESOURCES, HYDRAULICS & HYDROLOGY (WHH'06)
Chalkida, Evia Island, Greece
co-organized by WSEAS and Technological Educational Institute of Chalkida
Sponsored by WSEAS and WSEAS Transactions
May 11-13, 2006
Thursday, May 11, 2006
Plenary Lecture I
Mathematical modelling and simulation of blood circulation
Prof. Adelia Sequeira
Department of Mathematics and CEMAT/IST
Lisbon, Portugal
adelia.sequeira@math.ist.utl.pt
Abstract: Mathematical and numerical models together with computer simulations are playing an increasingly relevant role in biology and medicine. Applications to blood flow in the human circulatory system, in normal or pathological conditions are certainly one of the major mathematical challenges of the coming decades.
Relevant features have already been addressed but many fundamental issues have still to be fully understood. Blood is a multi-component mixture of plasma (Newtonian fluid), cells (elastic membranes filled with a Newtonian fluid), platelets (elastic solids) and other matter, like inorganic and organic salts, proteins and transported substances, that is homogenized and can be modeled as a single component fluid. Blood interacts both mechanically and chemically with vessel walls producing complex fluid-structure interactions whose mathematical analysis is still incomplete and which are practically impossible to simulate in its entirety.
In large and medium vessels, blood can be considered as a Navier-Stokes liquid, at a first level of approximation. However, blood can shear-thin considerably and also exhibits viscoelastic properties that cannot be neglected, at least in small arteries where the vessel diameters are comparable with the one of blood cells. In particular the high viscosity behaviour of blood at low shear rates is due to red blood cells aggregation (into rouleaux) and low viscosity at high shear rates is a consequence of deformability of red blood cells. Also stretching of the elastic red blood cells and their consequent storage of elastic energy account for the memory effects in blood.
In this talk we address some mathematical issues arising from the modelling of the cardiovascular system through problems of different complexity. Several reduced models have been developed which may give a reasonable approximation of averaged quantities, such as mean flow rate and pressure, in different sections of the cardiovascular system. They are, however, unable to provide the details often needed for understanding a local behaviour, such as the effect on the shear stress distribution due to a modification in the blood flow consequent to a partial vessel stenosis. In particular we will specifically consider the fluid-structure interaction problem of an incompressible generalized Newtonian shear-thinning fluid flowing inside a thin compliant vessel whose walls undergo small deformations under the action of the fluid. The numerical approach is based on a finite element method for the coupling of the fluid equations in a moving domain, described in an Arbitrary Lagrangian Eulerian (ALE) frame, with a simple structural model for the vessel wall. A review of various continuum (differential and rate type) constitutive models proposed for blood flow and their numerical simulations in different geometries will also be presented in this talk.
Plenary Lecture II
On the Mathematical Problems Arising from the Motion of a Viscous Fluid Around a Rotating Body
Professor Sarka Necasova
Mathematical Institute
Academy of Sciences
Prague, Czech Republic
Abstract: The motion of one or several rigid bodies in a viscous incompressible fluid has been a topic of numerous theoretical and numerical studies. Over the last 40 years the study of the motion of small particles in a viscous liquid has become one of the main focuses of the applied research. The presence of the particles affects the flow of the liquid, and in term, affects the motion of the particles, so that the problem of determining the flow characteristics is highly coupled. It is just the latter feature that makes any fundamental mathematical problem related to the liquid-particle interaction particularly challenging.
One of the mathematical aspects is the orientation of the particles in a viscous liquid. The orientation of long bodies in liquids of different nature is a fundamental issue in many problems of practical interest, for example, composite materials, separation of macromolecules of electrophoresis, ow induced microstructures. The second very interesting problem is the motion of a self-propelled body in a liquid. Typical examples are motions performed by birds, fish, rockets, submarines.
We would like to discuss the mathematical analysis of certain aspects of particle sedimentation. We assume that the liquid fills the whole space, in accordance with the fact that, as established by experiments: "wall effects" play no role on the preferred orientation of the particles. The mathematical analysis of particle sedimentation is based on the concept of free fall of a body B in a liquid L. To investigate the asymptotic behaviour of weak or strong solutions, the knowledge of the asymptotical structure of steady solutions is of the fundamental importance, and we will consider some properties of the linearized operators arising in this problem.
Plenary Lecture III
Flooding due to Sequential Dam Breaking
Professor C. D. Memos
School of Civil Engineering
National Technical University of Athens
GREECE
Abstract: The growing concern about the environmental impact due to eventual failure of civil engineering projects, encompasses cases where dam breaches can release enormous amount of water into natural watercourses. This could pose a serious threat to human life and property downstream of the failed dam. To assess the risk related to such situations a detailed description of the hydraulics of the resulting flood wave is required. However, in cases where more than one dams are present along the route of a watercourse, representation of the wave propagation is quite complex and realistic answers are difficult to be given by commercially available packages. Some of the complexities of the problem are discussed, especially those related to flood routing through a reservoir. Suggestions to overcome the difficulties are given along with a real life application to a Greek river with five dams constructed along its route.
SESSION: Computational Hydrology and Hydrological Modeling
Chair: Sombat Chuenchooklin, Juan Ospina
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Surface Water and Phreatic Aquifer Interaction in Floodplain with Paddy Field in Thailand |
Sombat Chuenchooklin, Tsutomu Ichikawa, Sanguan Patamatamkul, Chalong Kirdpitugsa, Vichai Sriboonlue |
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Analytical Solutions for Confined Aquifers with non constant Pumping using Computer Algebra |
Juan Ospina, Nicolas Guarin, Mario Velez |
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Role of Synthetic Storms on Peak Flow Estimation |
Betul Saf |
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Numerical Solution of Salt-Dome by Network Method |
Soto Meca, A., Alhama, F., Alhama, I., Gonzalez Fernandez, C. F. |
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Parameter Sensitivity and Uncertainty Analysis of the WetSpa Model using PEST |
Abdolreza Bahremand, Florimond De Smedt |
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Impact of Watershed Delineations on SWAT Runoff Predication: a Case Study in the Grote Nete Catchment, Flanders, Belgium |
Hamed Rouhani, Jan Feyen, Patrick Willems |
Friday, May 12, 2006
SESSION: Water Resources Quality and Management
Chair: Epaminondas Sidiropoulos, Frank Stagnitti
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Reservoir Inflows Forecasting with Artificial Neural Networks During Typhoon Period – for Shihmen Reservoir in Taiwan |
An-Pei Wang, Heng-Yi Liao, Chun-Yai Huang |
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Simulating Aquifer Exploitation through Adaptive Agents |
Gergios Georgakopoulos, Angela Zorba, Panagiotis Tolikas, Epaminondas Sidiropoulos |
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Nitrogen Transformation within Constructed Wetlands Purifying Secondary Treated Sewage |
T. Y. Yeh, C. M. Kao |
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Using Integrated Multimedia Modeling on NPS Pollution Evaluation for the Kaoping River Watershed |
T. C. Yang, C. M. Kao, T. Y. Yeh, C. E. Lin, Y. C. Lai |
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Adsorption of Pesticides from Aqueous Solutions using Oil Shale Ash |
Z. Al-Qodah, A. Shawaqfeh, W. Lafi |
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Wastewater Reuse and the Environment: Reaping the Benefits by Minimising the Impacts |
Andrew J. Hamilton, Vincent L. Versace, Frank Stagnitti, Peijun Li, Wei Yin, Peta Maher, Karen Hermon, Robert R. Premier, Daniel Ierodiaconou |
Saturday, May 13, 2006
Plenary Lecture III
Warping and Shear Deformation Effects in Static and Dynamic Analysis of 3-D Beam Elements
Evangelos Sapountzakis
National Technical University of Athens
Zografou Campus
Athens, GREECE
Abstract: In this speech, the static and dynamic analysis of 3-D beam elements restrained at their edges by the most general linear torsional, transverse or longitudinal boundary conditions and subjected in arbitrarily distributed static or dynamic twisting, bending, transverse or longitudinal loading is presented. For the solution of the problem at hand, a boundary element method is employed for the construction of the 14x14 stiffness matrix and the corresponding nodal load vector of a member of arbitrary homogeneous or composite cross section taking into account both warping and shear deformation effects, which together with the respective mass and damping matrices lead to the formulation of the equation of motion. To account for shear deformations, the concept of shear deformation coefficients is used, defining these factors using a strain energy approach, instead of Timoshenko’s and Cowper’s definitions, for which several authors have pointed out that one obtains unsatisfactory results or definitions given by other researchers, for which these factors take negative values. Eight boundary value problems with respect to the variable along the bar angle of twist, to the primary warping function, to a fictitious function, to the beam transverse and longitudinal displacements and to two stress functions are formulated and solved employing a pure BEM approach, that is only boundary discretization is used. Numerical results are presented to illustrate the method and demonstrate its efficiency and accuracy. The influence of the warping effect especially in composite members of open form cross section is analyzed through examples demonstrating the importance of the inclusion of the warping degrees of freedom in the analysis of a space frame. Moreover, the discrepancy of both the deflections and the internal forces of a member of a spatial structure arising from the ignorance of the shear deformation effect necessitates the inclusion of this additional effect, especially in thick walled cross section members. Moreover, free and forced transverse, longitudinal or torsional vibrations are considered, taking also into account effects of transverse, longitudinal, rotatory, torsional and warping inertia and damping resistance.
SESSION: Hydraulics and Hydrostatic Forces
Chair: Epaminondas Sidiropoulos, Evangelos Sapountzakis
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Statistical Analysis and Simulation of a Hydrostatic Force Experimental Device |
George Papaevangelou, Aris Psilovikos, Dimitris Ioannidis |
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3D Numerical Simulation of Curved Open Channel Flows |
Mauro De Marchis, Enrico Napoli |
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Assessment of Groundwater Safe-Yield |
Ho-Wen Chen, Ruey-Fang Yu, Wen-Po Cheng, Hsiu-Yuan Chien, Tze-Wen Chi |
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Vertical Turbulent Fountains in a Uniform Calm Ambient |
Thanos J. Kokkalis, Panos N. Papanicolaou |
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Trajectories of a Pair of Interacting Jets or Plumes Issuing Vertically Upwards into a Quiescent Environment |
Panayotis C. Yannopoulos |
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An Experimental of Flow Surface Patterns at Vertical Downward Intake with Numerical Validation |
Hassan Rahimzade, Nima Fathi, Mohammad Hesam Asoodeh |
SESSION: Hydrological Modeling and Programming Models
Chair: Constantine Memos, Nasreddine Saadouli
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Flooding due to Sequential Dam Breaking |
C. Memos, A. Stamou, M. Politis |
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Probabilistic Approach in Estimating Groundwater Changes for Slope Stability Applications |
Ali R. Zolfaghari, Andrew C. Heath |
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Fluvial Erosion and the Formation of Gully Systems over the Chinese Loess Plateau |
Chun Cang Huang, Zhiyuan Ren |
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A New 2-D Numerical Model to Simulate |
Soto Meca, A., Alhama, F., Alhama, I., Gonzalez Fernandez, C. F. |
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Multistage Stochastic Programming Model for the Operation of a Water Reservoir |
Chanaka Edirisinghe, Nasreddine Saadouli |
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In Pursuit of the Effective Water Governance |
Dimitris Zikos, Ross Beveridge, Will Medd |
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The Case of a "Weak Water" Governance Model: Athens – Greece |
D. Zikos, K. Bithas |
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Networking and Intermediarity in the Water Sector |
V. Markantonis, D. Zikos, K. Bithas |