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states</title> <meta name="description" content="Search results for: limit states"> <meta name="keywords" content="limit states"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="limit states"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 4473</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: limit states</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4473</span> Analysis of a Damage-Control Target Displacement of Reinforced Concrete Bridge Pier for Seismic Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Ritzman%20Abdul%20Karim">Mohd Ritzman Abdul Karim</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhaohui%20Huang"> Zhaohui Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A current focus in seismic engineering practice is the development of seismic design approach that focuses on the performance-based design. Performance-based design aims to design the structures to achieve specified performance based on the damage limit states. This damage limit is more restrictive limit than life safety and needs to be carefully estimated to avoid damage in piers due to failure in transverse reinforcement. In this paper, a different perspective of damage limit states has been explored by integrating two damage control material limit state, concrete and reinforcement by introduced parameters such as expected yield stress of transverse reinforcement where peak tension strain prior to bar buckling is introduced in a recent study. The different perspective of damage limit states with modified yield displacement and the modified plastic-hinge length is used in order to predict damage-control target displacement for reinforced concreate (RC) bridge pier. Three-dimensional (3D) finite element (FE) model has been developed for estimating damage target displacement to validate proposed damage limit states. The result from 3D FE analysis was validated with experimental study found in the literature. The validated model then was applied to predict the damage target displacement for RC bridge pier and to validate the proposed study. The tensile strain on reinforcement and compression on concrete were used to determine the predicted damage target displacement and compared with the proposed study. The result shows that the proposed damage limit states were efficient in predicting damage-control target displacement consistent with FE simulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage-control%20target%20displacement" title="damage-control target displacement">damage-control target displacement</a>, <a href="https://publications.waset.org/abstracts/search?q=damage%20limit%20states" title=" damage limit states"> damage limit states</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20bridge%20pier" title=" reinforced concrete bridge pier"> reinforced concrete bridge pier</a>, <a href="https://publications.waset.org/abstracts/search?q=yield%20displacement" title=" yield displacement"> yield displacement</a> </p> <a href="https://publications.waset.org/abstracts/99016/analysis-of-a-damage-control-target-displacement-of-reinforced-concrete-bridge-pier-for-seismic-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/99016.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">157</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4472</span> Hidden Markov Model for Financial Limit Order Book and Its Application to Algorithmic Trading Strategy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sriram%20Kashyap%20Prasad">Sriram Kashyap Prasad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ionut%20Florescu"> Ionut Florescu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study models the intraday asset prices as driven by Markov process. This work identifies the latent states of the Hidden Markov model, using limit order book data (trades and quotes) to continuously estimate the states throughout the day. This work builds a trading strategy using estimated states to generate signals. The strategy utilizes current state to recalibrate buy/ sell levels and the transition between states to trigger stop-loss when adverse price movements occur. The proposed trading strategy is tested on the Stevens High Frequency Trading (SHIFT) platform. SHIFT is a highly realistic market simulator with functionalities for creating an artificial market simulation by deploying agents, trading strategies, distributing initial wealth, etc. In the implementation several assets on the NASDAQ exchange are used for testing. In comparison to a strategy with static buy/ sell levels, this study shows that the number of limit orders that get matched and executed can be increased. Executing limit orders earns rebates on NASDAQ. The system can capture jumps in the limit order book prices, provide dynamic buy/sell levels and trigger stop loss signals to improve the PnL (Profit and Loss) performance of the strategy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=algorithmic%20trading" title="algorithmic trading">algorithmic trading</a>, <a href="https://publications.waset.org/abstracts/search?q=Hidden%20Markov%20model" title=" Hidden Markov model"> Hidden Markov model</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20frequency%20trading" title=" high frequency trading"> high frequency trading</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20order%20book%20learning" title=" limit order book learning"> limit order book learning</a> </p> <a href="https://publications.waset.org/abstracts/134323/hidden-markov-model-for-financial-limit-order-book-and-its-application-to-algorithmic-trading-strategy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134323.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">151</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4471</span> The Comparison of the Reliability Margin Measure for the Different Concepts in the Slope Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Filip%20Dodigovic">Filip Dodigovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Kreso%20Ivandic"> Kreso Ivandic</a>, <a href="https://publications.waset.org/abstracts/search?q=Damir%20Stuhec"> Damir Stuhec</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Strelec"> S. Strelec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The general difference analysis between the former and new design concepts in geotechnical engineering is carried out. The application of new regulations results in the need for real adaptation of the computation principles of limit states, i.e. by providing a uniform way of analyzing engineering tasks. Generally, it is not possible to unambiguously match the limit state verification procedure with those in the construction engineering. The reasons are the inability to fully consistency of the common probabilistic basis of the analysis, and the fundamental effect of material properties on the value of actions and the influence of actions on resistance. Consequently, it is not possible to apply separate factorization with partial coefficients, as in construction engineering. For the slope stability analysis design procedures problems in the light of the use of limit states in relation to the concept of allowable stresses is detailed in. The quantifications of the safety margins in the slope stability analysis for both approaches is done. When analyzing the stability of the slope, by the strict application of the adopted forms from the new regulations for significant external temporary and/or seismic actions, the equivalent margin of safety is increased. The consequence is the emergence of more conservative solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=allowable%20pressure" title="allowable pressure">allowable pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=Eurocode%207" title=" Eurocode 7"> Eurocode 7</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20states" title=" limit states"> limit states</a>, <a href="https://publications.waset.org/abstracts/search?q=slope%20stability" title=" slope stability"> slope stability</a> </p> <a href="https://publications.waset.org/abstracts/87490/the-comparison-of-the-reliability-margin-measure-for-the-different-concepts-in-the-slope-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87490.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">337</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4470</span> Using Squeezed Vacuum States to Enhance the Sensitivity of Ground Based Gravitational Wave Interferometers beyond the Standard Quantum Limit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Giacomo%20Ciani">Giacomo Ciani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper reviews the impact of quantum noise on modern gravitational wave interferometers and explains how squeezed vacuum states are used to push the noise below the standard quantum limit. With the first detection of gravitational waves from a pair of colliding black holes in September 2015 and subsequent detections including that of gravitational waves from a pair of colliding neutron stars, the ground-based interferometric gravitational wave observatories LIGO and VIRGO have opened the era of gravitational-wave and multi-messenger astronomy. Improving the sensitivity of the detectors is of paramount importance to increase the number and quality of the detections, fully exploiting this new information channel about the universe. Although still in the commissioning phase and not at nominal sensitivity, these interferometers are designed to be ultimately limited by a combination of shot noise and quantum radiation pressure noise, which define an envelope known as the standard quantum limit. Despite the name, this limit can be beaten with the use of advanced quantum measurement techniques, with the use of squeezed vacuum states being currently the most mature and promising. Different strategies for implementation of the technology in the large-scale detectors, in both their frequency-independent and frequency-dependent variations, are presented, together with an analysis of the main technological issues and expected sensitivity gain. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gravitational%20waves" title="gravitational waves">gravitational waves</a>, <a href="https://publications.waset.org/abstracts/search?q=interferometers" title=" interferometers"> interferometers</a>, <a href="https://publications.waset.org/abstracts/search?q=squeezed%20vacuum" title=" squeezed vacuum"> squeezed vacuum</a>, <a href="https://publications.waset.org/abstracts/search?q=standard%20quantum%20limit" title=" standard quantum limit"> standard quantum limit</a> </p> <a href="https://publications.waset.org/abstracts/85856/using-squeezed-vacuum-states-to-enhance-the-sensitivity-of-ground-based-gravitational-wave-interferometers-beyond-the-standard-quantum-limit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85856.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">151</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4469</span> Classification of Sturm-Liouville Problems at Infinity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kishor%20J.%20shinde">Kishor J. shinde</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We determine the values of k and p such that the Sturm-Liouville differential operator τu=-(d^2 u)/(dx^2) + kx^p u is in limit point case or limit circle case at infinity. In particular it is shown that τ is in the limit point case when (i) for p=2 and ∀k, (ii) for ∀p and k=0, (iii) for all p and k>0, (iv) for 0≤p≤2 and k<0, (v) for p<0 and k<0. τ is in the limit circle case when (i) for p>2 and k<0. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=limit%20point%20case" title="limit point case">limit point case</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20circle%20case" title=" limit circle case"> limit circle case</a>, <a href="https://publications.waset.org/abstracts/search?q=Sturm-Liouville" title=" Sturm-Liouville"> Sturm-Liouville</a>, <a href="https://publications.waset.org/abstracts/search?q=infinity" title=" infinity"> infinity</a> </p> <a href="https://publications.waset.org/abstracts/8386/classification-of-sturm-liouville-problems-at-infinity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8386.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">367</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4468</span> Ground States of Structure of Even ¹⁰⁴-¹⁰⁶ Ru Isotopes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20Hossain">I. Hossain</a>, <a href="https://publications.waset.org/abstracts/search?q=Huda%20H.%20Kassim"> Huda H. Kassim</a>, <a href="https://publications.waset.org/abstracts/search?q=Fadhil%20I.%20Sharrad"> Fadhil I. Sharrad</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20A.%20Mansour"> Said A. Mansour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this conference, we apply the interacting boson model-1 (IBM-1) formula for U(5) symmetry in order to calculate the energy levels and reduced transition probabilities for a few yrast transitions in Ru with neutron N=60, 62. The neutron rich even-even isotopes of Ru are very interesting to investigate using IBM-1, because even 104,106Ru isotopes are great consequence due to excited near the magic number 50. The calculation of ground state band and B(E2) values using IBM-1 for Z=44 are not calculated to describe the valuable information of nuclear structure by U(5) limit. The parameters in the formula are deduced based on the experimental energy level and value of B(E2, 2+->0+). The yrast states and transition strength B(E2) from 1st 4+ to 1st 2+, 1st 6+ to 1st 4+ and 1st 8+ to 1st 6+ states of Ru for even N= 60, 62 were calculated. The quadrupole moments, deformation parameters and U(5) limit were discussed for those nuclei. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=B%28E2%29" title="B(E2)">B(E2)</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20level" title=" energy level"> energy level</a>, <a href="https://publications.waset.org/abstracts/search?q=%C2%B9%E2%81%B0%E2%81%B4Ru" title=" ¹⁰⁴Ru"> ¹⁰⁴Ru</a>, <a href="https://publications.waset.org/abstracts/search?q=%C2%B9%E2%81%B0%E2%81%B6Ru" title=" ¹⁰⁶Ru"> ¹⁰⁶Ru</a> </p> <a href="https://publications.waset.org/abstracts/56470/ground-states-of-structure-of-even-14-16-ru-isotopes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56470.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">348</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4467</span> Quantum Coherence Sets the Quantum Speed Limit for Mixed States</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Debasis%20Mondal">Debasis Mondal</a>, <a href="https://publications.waset.org/abstracts/search?q=Chandan%20Datta"> Chandan Datta</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20K.%20Sazim"> S. K. Sazim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Quantum coherence is a key resource like entanglement and discord in quantum information theory. Wigner- Yanase skew information, which was shown to be the quantum part of the uncertainty, has recently been projected as an observable measure of quantum coherence. On the other hand, the quantum speed limit has been established as an important notion for developing the ultra-speed quantum computer and communication channel. Here, we show that both of these quantities are related. Thus, cast coherence as a resource to control the speed of quantum communication. In this work, we address three basic and fundamental questions. There have been rigorous attempts to achieve more and tighter evolution time bounds and to generalize them for mixed states. However, we are yet to know (i) what is the ultimate limit of quantum speed? (ii) Can we measure this speed of quantum evolution in the interferometry by measuring a physically realizable quantity? Most of the bounds in the literature are either not measurable in the interference experiments or not tight enough. As a result, cannot be effectively used in the experiments on quantum metrology, quantum thermodynamics, and quantum communication and especially in Unruh effect detection et cetera, where a small fluctuation in a parameter is needed to be detected. Therefore, a search for the tightest yet experimentally realisable bound is a need of the hour. It will be much more interesting if one can relate various properties of the states or operations, such as coherence, asymmetry, dimension, quantum correlations et cetera and QSL. Although, these understandings may help us to control and manipulate the speed of communication, apart from the particular cases like the Josephson junction and multipartite scenario, there has been a little advancement in this direction. Therefore, the third question we ask: (iii) Can we relate such quantities with QSL? In this paper, we address these fundamental questions and show that quantum coherence or asymmetry plays an important role in setting the QSL. An important question in the study of quantum speed limit may be how it behaves under classical mixing and partial elimination of states. This is because this may help us to choose properly a state or evolution operator to control the speed limit. In this paper, we try to address this question and show that the product of the time bound of the evolution and the quantum part of the uncertainty in energy or quantum coherence or asymmetry of the state with respect to the evolution operator decreases under classical mixing and partial elimination of states. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=completely%20positive%20trace%20preserving%20maps" title="completely positive trace preserving maps">completely positive trace preserving maps</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20coherence" title=" quantum coherence"> quantum coherence</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20speed%20limit" title=" quantum speed limit"> quantum speed limit</a>, <a href="https://publications.waset.org/abstracts/search?q=Wigner-Yanase%20Skew%20information" title=" Wigner-Yanase Skew information "> Wigner-Yanase Skew information </a> </p> <a href="https://publications.waset.org/abstracts/40216/quantum-coherence-sets-the-quantum-speed-limit-for-mixed-states" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40216.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">353</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4466</span> Features of Calculating Structures for Frequent Weak Earthquakes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Belashov">M. S. Belashov</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20V.%20Benin"> A. V. Benin</a>, <a href="https://publications.waset.org/abstracts/search?q=Lin%20Hong"> Lin Hong</a>, <a href="https://publications.waset.org/abstracts/search?q=Sh.%20Sh.%20Nazarova"> Sh. Sh. Nazarova</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20B.%20Sabirova"> O. B. Sabirova</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Uzdin"> A. M. Uzdin</a>, <a href="https://publications.waset.org/abstracts/search?q=Lin%20Hong"> Lin Hong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The features of calculating structures for the action of weak earthquakes are analyzed. Earthquakes with a recurrence of 30 years and 50 years are considered. In the first case, the structure is to operate normally without damage after the earthquake. In the second case, damages are allowed that do not affect the possibility of the structure operation. Three issues are emphasized: setting elastic and damping characteristics of reinforced concrete, formalization of limit states, and combinations of loads. The dependence of damping on the reinforcement coefficient is estimated. When evaluating limit states, in addition to calculations for crack resistance and strength, a human factor, i.e., the possibility of panic among people, was considered. To avoid it, it is proposed to limit a floor-by-floor speed level in certain octave ranges. Proposals have been developed for estimating the coefficients of the combination of various loads with the seismic one. As an example, coefficients of combinations of seismic and ice loads are estimated. It is shown that for strong actions, the combination coefficients for different regions turn out to be close, while for weak actions, they may differ. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=weak%20earthquake" title="weak earthquake">weak earthquake</a>, <a href="https://publications.waset.org/abstracts/search?q=frequent%20earthquake" title=" frequent earthquake"> frequent earthquake</a>, <a href="https://publications.waset.org/abstracts/search?q=damage" title=" damage"> damage</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20state" title=" limit state"> limit state</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforcement" title=" reinforcement"> reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20resistance" title=" crack resistance"> crack resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=strength%20resistance" title=" strength resistance"> strength resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=a%20floor-by-floor%20velocity" title=" a floor-by-floor velocity"> a floor-by-floor velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=combination%20coefficients" title=" combination coefficients"> combination coefficients</a> </p> <a href="https://publications.waset.org/abstracts/159990/features-of-calculating-structures-for-frequent-weak-earthquakes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159990.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">88</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4465</span> Calibration of the Radical Installation Limit Error of the Accelerometer in the Gravity Gradient Instrument</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Danni%20Cong">Danni Cong</a>, <a href="https://publications.waset.org/abstracts/search?q=Meiping%20Wu"> Meiping Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaofeng%20He"> Xiaofeng He</a>, <a href="https://publications.waset.org/abstracts/search?q=Junxiang%20Lian"> Junxiang Lian</a>, <a href="https://publications.waset.org/abstracts/search?q=Juliang%20Cao"> Juliang Cao</a>, <a href="https://publications.waset.org/abstracts/search?q=Shaokuncai"> Shaokuncai</a>, <a href="https://publications.waset.org/abstracts/search?q=Hao%20Qin"> Hao Qin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gravity gradient instrument (GGI) is the core of the gravity gradiometer, so the structural error of the sensor has a great impact on the measurement results. In order not to affect the aimed measurement accuracy, limit error is required in the installation of the accelerometer. In this paper, based on the established measuring principle model, the radial installation limit error is calibrated, which is taken as an example to provide a method to calculate the other limit error of the installation under the premise of ensuring the accuracy of the measurement result. This method provides the idea for deriving the limit error of the geometry structure of the sensor, laying the foundation for the mechanical precision design and physical design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gravity%20gradient%20sensor" title="gravity gradient sensor">gravity gradient sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=radial%20installation%20limit%20error" title=" radial installation limit error"> radial installation limit error</a>, <a href="https://publications.waset.org/abstracts/search?q=accelerometer" title=" accelerometer"> accelerometer</a>, <a href="https://publications.waset.org/abstracts/search?q=uniaxial%20rotational%20modulation" title=" uniaxial rotational modulation"> uniaxial rotational modulation</a> </p> <a href="https://publications.waset.org/abstracts/75475/calibration-of-the-radical-installation-limit-error-of-the-accelerometer-in-the-gravity-gradient-instrument" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75475.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">422</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4464</span> Slip Limit Prediction of High-Strength Bolt Joints Based on Local Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chang%20He">Chang He</a>, <a href="https://publications.waset.org/abstracts/search?q=Hiroshi%20Tamura"> Hiroshi Tamura</a>, <a href="https://publications.waset.org/abstracts/search?q=Hiroshi%20Katsuchi"> Hiroshi Katsuchi</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiaqi%20Wang"> Jiaqi Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the aim is to infer the slip limit (static friction limit) of contact interfaces in bolt friction joints by analyzing other bolt friction joints with the same contact surface but in a different shape. By using the Weibull distribution to deal with microelements on the contact surface statistically, the slip limit of a certain type of bolt joint was predicted from other types of bolt joint with the same contact surface. As a result, this research succeeded in predicting the slip limit of bolt joins with different numbers of contact surfaces and with different numbers of bolt rows. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bolt%20joints" title="bolt joints">bolt joints</a>, <a href="https://publications.waset.org/abstracts/search?q=slip%20coefficient" title=" slip coefficient"> slip coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=Weibull%20distribution" title=" Weibull distribution"> Weibull distribution</a> </p> <a href="https://publications.waset.org/abstracts/153579/slip-limit-prediction-of-high-strength-bolt-joints-based-on-local-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/153579.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">170</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4463</span> Limit-Cycles Method for the Navigation and Avoidance of Any Form of Obstacles for Mobile Robots in Cluttered Environment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Boufera">F. Boufera</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Debbat"> F. Debbat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with an approach based on limit-cycles method for the problem of obstacle avoidance of mobile robots in unknown environments for any form of obstacles. The purpose of this approach is the improvement of limit-cycles method in order to obtain safe and ﬂexible navigation. The proposed algorithm has been successfully tested in diﬀerent conﬁguration on simulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mobile%20robot" title="mobile robot">mobile robot</a>, <a href="https://publications.waset.org/abstracts/search?q=navigation" title=" navigation"> navigation</a>, <a href="https://publications.waset.org/abstracts/search?q=avoidance%20of%20obstacles" title=" avoidance of obstacles"> avoidance of obstacles</a>, <a href="https://publications.waset.org/abstracts/search?q=limit-cycles%20method" title=" limit-cycles method"> limit-cycles method</a> </p> <a href="https://publications.waset.org/abstracts/21940/limit-cycles-method-for-the-navigation-and-avoidance-of-any-form-of-obstacles-for-mobile-robots-in-cluttered-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21940.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">429</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4462</span> Limit State Evaluation of Bridge According to Peak Ground Acceleration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Minho%20Kwon">Minho Kwon</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeonghee%20Lim"> Jeonghee Lim</a>, <a href="https://publications.waset.org/abstracts/search?q=Yeongseok%20Jeong"> Yeongseok Jeong</a>, <a href="https://publications.waset.org/abstracts/search?q=Jongyoon%20Moon"> Jongyoon Moon</a>, <a href="https://publications.waset.org/abstracts/search?q=Donghoon%20Shin"> Donghoon Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Kiyoung%20Kim"> Kiyoung Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the past, the criteria and procedures for the design of concrete structures were mainly based on the stresses allowed for structural components. However, although the frequency of earthquakes has increased and the risk has increased recently, it has been difficult to determine the safety factor for earthquakes in the safety assessment of structures based on allowable stresses. Recently, limit state design method has been introduced for reinforced concrete structures, and limit state-based approach has been recognized as a more effective technique for seismic design. Therefore, in this study, the limit state of the bridge, which is a structure requiring higher stability against earthquakes, was evaluated. The finite element program LS-DYNA and twenty ground motion were used for time history analysis. The fracture caused by tensile and compression of the pier were set to the limit state. In the concrete tensile fracture, the limit state arrival rate was 100% at peak ground acceleration 0.4g. In the concrete compression fracture, the limit state arrival rate was 100% at peak ground acceleration 0.2g. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=allowable%20stress" title="allowable stress">allowable stress</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20state" title=" limit state"> limit state</a>, <a href="https://publications.waset.org/abstracts/search?q=safety%20factor" title=" safety factor"> safety factor</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20ground%20acceleration" title=" peak ground acceleration"> peak ground acceleration</a> </p> <a href="https://publications.waset.org/abstracts/83050/limit-state-evaluation-of-bridge-according-to-peak-ground-acceleration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83050.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">213</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4461</span> Airfield Pavements Made of Reinforced Concrete: Dimensioning According to the Theory of Limit States and Eurocode</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Linek">M. Linek</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Nita"> P. Nita</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the previous airfield construction industry, pavements made of reinforced concrete have been used very rarely; however, the necessity to use this type of pavements in an emergency situations justifies the need reference to this issue. The paper concerns the problem of airfield pavement dimensioning made of reinforced concrete and the evaluation of selected dimensioning methods of reinforced concrete slabs intended for airfield pavements. Analysis of slabs dimensioning, according to classical method of limit states has been performed and it has been compared to results obtained in case of methods complying with Eurocode 2 guidelines. Basis of an analysis was a concrete slab of class C35/45 with reinforcement, located in tension zone. Steel bars of 16.0 mm have been used as slab reinforcement. According to comparative analysis of obtained results, conclusions were reached regarding application legitimacy of the discussed methods and their design advantages. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rainforced%20concrete" title="rainforced concrete">rainforced concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=cement%20concrete" title=" cement concrete"> cement concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=airport%20pavements" title=" airport pavements"> airport pavements</a>, <a href="https://publications.waset.org/abstracts/search?q=dimensioning" title=" dimensioning"> dimensioning</a> </p> <a href="https://publications.waset.org/abstracts/53911/airfield-pavements-made-of-reinforced-concrete-dimensioning-according-to-the-theory-of-limit-states-and-eurocode" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53911.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">255</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4460</span> Lambda-Levelwise Statistical Convergence of a Sequence of Fuzzy Numbers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Berna%20Benli">F. Berna Benli</a>, <a href="https://publications.waset.org/abstracts/search?q=%C3%96zg%C3%BCr%20Keskin"> Özgür Keskin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lately, many mathematicians have been studied the statistical convergence of a sequence of fuzzy numbers. We know that Lambda-statistically convergence is a kind of convergence between ordinary convergence and statistical convergence. In this paper, we will introduce the new kind of convergence such as λ-levelwise statistical convergence. Then, we will define the concept of the λ-levelwise statistical cluster and limit points of a sequence of fuzzy numbers. Also, we will discuss the relations between the sets of λ-levelwise statistical cluster points and λ-levelwise statistical limit points of sequences of fuzzy numbers. This work has been extended in this paper, where some relations have been considered such that when lambda-statistical limit inferior and lambda-statistical limit superior for lambda-statistically convergent sequences of fuzzy numbers are equal. Furthermore, lambda-statistical boundedness condition for different sequences of fuzzy numbers has been studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20number" title="fuzzy number">fuzzy number</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-levelwise%20statistical%20cluster%20points" title=" λ-levelwise statistical cluster points"> λ-levelwise statistical cluster points</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-levelwise%20statistical%20convergence" title=" λ-levelwise statistical convergence"> λ-levelwise statistical convergence</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-levelwise%20statistical%20limit%20points" title=" λ-levelwise statistical limit points"> λ-levelwise statistical limit points</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-statistical%20cluster%20points" title=" λ-statistical cluster points"> λ-statistical cluster points</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-statistical%20convergence" title=" λ-statistical convergence"> λ-statistical convergence</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%BB-statistical%20limit%20%20points" title=" λ-statistical limit points"> λ-statistical limit points</a> </p> <a href="https://publications.waset.org/abstracts/20755/lambda-levelwise-statistical-convergence-of-a-sequence-of-fuzzy-numbers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20755.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">477</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4459</span> Minimum Ratio of Flexural Reinforcement for High Strength Concrete Beams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azad%20A.%20Mohammed">Azad A. Mohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Dunyazad%20K.%20Assi"> Dunyazad K. Assi</a>, <a href="https://publications.waset.org/abstracts/search?q=Alan%20S.%20Abdulrahman"> Alan S. Abdulrahman </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Current ACI 318 Code provides two limits for minimum steel ratio for concrete beams. When concrete compressive strength be larger than 31 MPa the limit of √(fc')/4fy usually governs. In this paper shortcomings related to using this limit was fairly discussed and showed that the limit is based on 90% safety factor and was derived based on modulus of rupture equation suitable for concretes of compressive strength lower than 31 MPa. Accordingly, the limit is nor suitable and critical for concretes of higher compressive strength. An alternative equation was proposed for minimum steel ratio of rectangular beams and was found that the proposed limit is accurate for beams of wide range of concrete compressive strength. Shortcomings of the current ACI 318 Code equation and accuracy of the proposed equation were supported by test data obtained from testing six reinforced concrete beams. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=concrete%20beam" title="concrete beam">concrete beam</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title=" compressive strength"> compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=minimum%20steel%20ratio" title=" minimum steel ratio"> minimum steel ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=modulus%20of%20rupture" title=" modulus of rupture"> modulus of rupture</a> </p> <a href="https://publications.waset.org/abstracts/17902/minimum-ratio-of-flexural-reinforcement-for-high-strength-concrete-beams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17902.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">552</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4458</span> Generalized Limit Equilibrium Solution for the Lateral Pile Capacity Problem</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tomer%20Gans-Or">Tomer Gans-Or</a>, <a href="https://publications.waset.org/abstracts/search?q=Shmulik%20Pinkert"> Shmulik Pinkert</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The determination of lateral pile capacity per unit length is a key aspect in geotechnical engineering. Traditional approaches for assessing piles lateral capacity in cohesive soils involve the application of upper-bound and lower-bound plasticity theorems. However, a comprehensive solution encompassing the entire spectrum of soil strength parameters, particularly in frictional soils with or without cohesion, is still lacking. This research introduces an innovative implementation of the slice method limit equilibrium solution for lateral capacity assessment. For any given numerical discretization of the soil's domain around the pile, the lateral capacity evaluation is based on mobilized strength concept. The critical failure geometry is then found by a unique optimization procedure which includes both factor of safety minimization and geometrical optimization. The robustness of this suggested methodology is that the solution is independent of any predefined assumptions. Validation of the solution is accomplished through a comparison with established plasticity solutions for cohesive soils. Furthermore, the study demonstrates the applicability of the limit equilibrium method to address unresolved cases related to frictional and cohesive-frictional soils. Beyond providing capacity values, the method enables the utilization of the mobilized strength concept to generate safety-factor distributions for scenarios representing pre-failure states. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lateral%20pile%20capacity" title="lateral pile capacity">lateral pile capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=slice%20method" title=" slice method"> slice method</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20equilibrium" title=" limit equilibrium"> limit equilibrium</a>, <a href="https://publications.waset.org/abstracts/search?q=mobilized%20strength" title=" mobilized strength"> mobilized strength</a> </p> <a href="https://publications.waset.org/abstracts/182938/generalized-limit-equilibrium-solution-for-the-lateral-pile-capacity-problem" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182938.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">61</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4457</span> Reliability Based Optimal Design of Laterally Loaded Pile with Limited Residual Strain Energy Capacity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Movahedi%20Rad">M. Movahedi Rad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a general approach to the reliability based limit analysis of laterally loaded piles is presented. In engineering practice, the uncertainties play a very important role. The aim of this study is to evaluate the lateral load capacity of free head and fixed-head long pile when the plastic limit analysis is considered. In addition to the plastic limit analysis to control the plastic behaviour of the structure, uncertain bound on the complementary strain energy of the residual forces is also applied. This bound has a significant effect for the load parameter. The solution to reliability-based problems is obtained by a computer program which is governed by the reliability index calculation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reliability" title="reliability">reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=laterally%20loaded%20pile" title=" laterally loaded pile"> laterally loaded pile</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20strain%20energy" title=" residual strain energy"> residual strain energy</a>, <a href="https://publications.waset.org/abstracts/search?q=probability" title=" probability"> probability</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20analysis" title=" limit analysis"> limit analysis</a> </p> <a href="https://publications.waset.org/abstracts/32265/reliability-based-optimal-design-of-laterally-loaded-pile-with-limited-residual-strain-energy-capacity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32265.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4456</span> Optimal Replacement Period for a One-Unit System with Double Repair Cost Limits</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Min-Tsai%20Lai">Min-Tsai Lai</a>, <a href="https://publications.waset.org/abstracts/search?q=Taqwa%20Hariguna"> Taqwa Hariguna</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a periodical replacement model for a system, considering the concept of single and cumulative repair cost limits simultaneously. The failures are divided into two types. Minor failure can be corrected by minimal repair and serious failure makes the system breakdown completely. When a minor failure occurs, if the repair cost is less than a single repair cost limit L1 and the accumulated repair cost is less than a cumulative repair cost limit L2, then minimal repair is executed, otherwise, the system is preventively replaced. The system is also replaced at time T or at serious failure. The optimal period T minimizing the long-run expected cost per unit time is verified to be finite and unique under some specific conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=repair-cost%20limit" title="repair-cost limit">repair-cost limit</a>, <a href="https://publications.waset.org/abstracts/search?q=cumulative%20repair-cost%20limit" title=" cumulative repair-cost limit"> cumulative repair-cost limit</a>, <a href="https://publications.waset.org/abstracts/search?q=minimal%20repair" title=" minimal repair"> minimal repair</a>, <a href="https://publications.waset.org/abstracts/search?q=periodical%20replacement%20policy" title=" periodical replacement policy"> periodical replacement policy</a> </p> <a href="https://publications.waset.org/abstracts/28802/optimal-replacement-period-for-a-one-unit-system-with-double-repair-cost-limits" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28802.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4455</span> Adaptive Envelope Protection Control for the below and above Rated Regions of Wind Turbines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mustafa%20Sahin">Mustafa Sahin</a>, <a href="https://publications.waset.org/abstracts/search?q=%C4%B0lkay%20Yavrucuk"> İlkay Yavrucuk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a wind turbine envelope protection control algorithm that protects Variable Speed Variable Pitch (VSVP) wind turbines from damage during operation throughout their below and above rated regions, i.e. from cut-in to cut-out wind speed. The proposed approach uses a neural network that can adapt to turbines and their operating points. An algorithm monitors instantaneous wind and turbine states, predicts a wind speed that would push the turbine to a pre-defined envelope limit and, when necessary, realizes an avoidance action. Simulations are realized using the MS Bladed Wind Turbine Simulation Model for the NREL 5 MW wind turbine equipped with baseline controllers. In all simulations, through the proposed algorithm, it is observed that the turbine operates safely within the allowable limit throughout the below and above rated regions. Two example cases, adaptations to turbine operating points for the below and above rated regions and protections are investigated in simulations to show the capability of the proposed envelope protection system (EPS) algorithm, which reduces excessive wind turbine loads and expectedly increases the turbine service life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20envelope%20protection%20control" title="adaptive envelope protection control">adaptive envelope protection control</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20detection%20and%20avoidance" title=" limit detection and avoidance"> limit detection and avoidance</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20networks" title=" neural networks"> neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=ultimate%20load%20reduction" title=" ultimate load reduction"> ultimate load reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20turbine%20power%20control" title=" wind turbine power control"> wind turbine power control</a> </p> <a href="https://publications.waset.org/abstracts/121488/adaptive-envelope-protection-control-for-the-below-and-above-rated-regions-of-wind-turbines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121488.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">136</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4454</span> Analytical Development of a Failure Limit and Iso-Uplift Curves for Eccentrically Loaded Shallow Foundations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Abbas">N. Abbas</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Lagomarsino"> S. Lagomarsino</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Cattari"> S. Cattari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Examining existing experimental results for shallow rigid foundations subjected to vertical centric load (N), accompanied or not with a bending moment (M), two main non-linear mechanisms governing the cyclic ‎response of the soil-foundation system can be distinguished: foundation uplift and soil yielding. A soil-foundation failure limit, is defined as a domain of resistance in the two dimensional (2D) load space (N, M) inside of which lie all the admissible combinations of loads; these latter correspond to a pure elastic, non-linear elastic or plastic behavior of the soil-foundation system, while the points lying on the failure limit correspond to a combination of loads leading to a failure of the soil-foundation system. In this study, the proposed resistance domain is constructed analytically based on mechanics. Original elastic limit, uplift initiation ‎limit and iso-uplift limits are constructed inside this domain. These limits give a prediction ‎of the mechanisms activated for each combination of loads applied to the ‎foundation. A comparison of the proposed failure limit with experimental tests existing in the literature shows interesting results. Also, the developed uplift initiation limit and iso-uplift curves are confronted with others already proposed in the literature and widely used due to the absence of other alternatives, and remarkable differences are noted, showing evident errors in the past proposals and relevant accuracy for those given in the present work. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=foundation%20uplift" title="foundation uplift">foundation uplift</a>, <a href="https://publications.waset.org/abstracts/search?q=iso-uplift%20curves" title=" iso-uplift curves"> iso-uplift curves</a>, <a href="https://publications.waset.org/abstracts/search?q=resistance%20domain" title=" resistance domain"> resistance domain</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20yield" title=" soil yield"> soil yield</a> </p> <a href="https://publications.waset.org/abstracts/22758/analytical-development-of-a-failure-limit-and-iso-uplift-curves-for-eccentrically-loaded-shallow-foundations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22758.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">383</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4453</span> A Predator-Prey System with Singularity at the Origin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nabil%20Beroual">Nabil Beroual</a>, <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Sari"> Tewfik Sari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We consider the Gause-type predator-prey system in the case where the response function is not smooth at the origin. We discuss the conditions under which this system has exactly one stable limit cycle or has a positive stable equilibrium point, and we describe the basin of attraction of the stable limit cycle and the stable equilibrium point, respectively. Our results correct previous results of the existing literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=predator-prey%20model" title="predator-prey model">predator-prey model</a>, <a href="https://publications.waset.org/abstracts/search?q=response%20function" title=" response function"> response function</a>, <a href="https://publications.waset.org/abstracts/search?q=singularity" title=" singularity"> singularity</a>, <a href="https://publications.waset.org/abstracts/search?q=basin%20of%20attraction" title="basin of attraction">basin of attraction</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20cycle" title=" limit cycle"> limit cycle</a> </p> <a href="https://publications.waset.org/abstracts/149715/a-predator-prey-system-with-singularity-at-the-origin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149715.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">179</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4452</span> Prospective Mathematics Teachers' Content Knowledge on the Definition of Limit and Derivative</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Reyhan%20Tekin%20Sitrava">Reyhan Tekin Sitrava</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Teachers should have robust and comprehensive content knowledge for effective mathematics teaching. It was explained that content knowledge includes knowing the facts, truths, and concepts; explaining the reasons behind these facts, truths and concepts, and making relationship between the concepts and other disciplines. By virtue of its importance, it will be significant to explore teachers and prospective teachers’ content knowledge related to variety of topics in mathematics. From this point of view, the purpose of this study was to investigate prospective mathematics teachers’ content knowledge. Particularly, it was aimed to reveal the prospective teachers’ knowledge regarding the definition of limit and derivate. To achieve the purpose and to get in-depth understanding, a qualitative case study method was used. The data was collected from 34 prospective mathematics teachers through a questionnaire containing 2 questions. The first question required the prospective teachers to define the limit and the second one required to define the derivative. The data was analyzed using content analysis method. Based on the analysis of the data, although half of the prospective teachers (50%) could write the definition of the limit, nine prospective teachers (26.5%) could not define limit. However, eight prospective teachers’ definition was regarded as partially correct. On the other hand, twenty-seven prospective teachers (79.5%) could define derivative, but seven of them (20.5%) defined it partially. According to the findings, most of the prospective teachers have robust content knowledge on limit and derivative. This result is important because definitions have a virtual role in learning and teaching of mathematics. More specifically, definition is starting point to understand the meaning of a concept. From this point of view, prospective teachers should know the definitions of the concepts to be able to teach them correctly to the students. In addition, they should have knowledge about the relationship between limit and derivative so that they can explain these concepts conceptually. Otherwise, students may memorize the rules of calculating the derivative and the limit. In conclusion, the present study showed that most of the prospective mathematics teachers had enough knowledge about the definition of derivative and limit. However, the rest of them should learn their definition conceptually. The examples of correct, partially correct, and incorrect definition of both concepts will be presented and discussed based on participants’ statements. This study has some implications for instructors. Instructors should be careful about whether students learn the definition of these concepts or not. In order to this, the instructors may give prospective teachers opportunities to discuss the definition of these concepts and the relationship between the concepts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=content%20knowledge" title="content knowledge">content knowledge</a>, <a href="https://publications.waset.org/abstracts/search?q=derivative" title=" derivative"> derivative</a>, <a href="https://publications.waset.org/abstracts/search?q=limit" title=" limit"> limit</a>, <a href="https://publications.waset.org/abstracts/search?q=prospective%20mathematics%20teachers" title=" prospective mathematics teachers"> prospective mathematics teachers</a> </p> <a href="https://publications.waset.org/abstracts/89307/prospective-mathematics-teachers-content-knowledge-on-the-definition-of-limit-and-derivative" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89307.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">221</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4451</span> Examples of RC Design with Eurocode2</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carla%20Ferreira">Carla Ferreira</a>, <a href="https://publications.waset.org/abstracts/search?q=Helena%20Barros"> Helena Barros</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper termed “Design of reinforced concrete with Eurocode 2” presents the theory regarding the design of reinforced concrete sections and the development of the tables and abacuses to verify the concrete section to the ultimate limit and service limit states. This paper is a complement of it, showing how to use the previous tools. Different numerical results are shown, proving the capability of the methodology. When a section of a beam is already chosen, the computer program presents the reinforcing steel in many locations along the structure, and it is the engineer´s task to choose the layout available for the construction, considering the maximum regular kind of reinforcing bars. There are many computer programs available for this task, but the interest of the present kind of tools is the fast and easy way of making the design and choose the optimal solution. Another application of these design tools is in the definition of the section dimensions, in a way that when stresses are evaluated, the final design is acceptable. In the design offices, these are considered by the engineers a very quick and useful way of designing reinforced concrete sections, employing variable strength concrete and higher steel classes. Examples of nonlinear analyses and redistribution of the bending moment will be considered, according to the Eurocode 2 recommendations, for sections under bending moment and axial forces. Examples of the evaluation of the service limit state will be presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20examples" title="design examples">design examples</a>, <a href="https://publications.waset.org/abstracts/search?q=eurocode%202" title=" eurocode 2"> eurocode 2</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete" title=" reinforced concrete"> reinforced concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=section%20design" title=" section design"> section design</a> </p> <a href="https://publications.waset.org/abstracts/174988/examples-of-rc-design-with-eurocode2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/174988.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">72</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4450</span> Types of Limit Application Problems in Engineering Students: Case Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Veronica%20Diaz%20Quezada">Veronica Diaz Quezada</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The society of the 21st century requires training of engineers capable of solving routine and non-routine problems in applications of the limit of real functions, as part of the course Calculus I. For this purpose, research was conducted with a methodological design that combines quantitative and qualitative procedures and that aims, to identify and to characterize the types of problems according to their nature and context, through the application of a mathematics test; to know— through a questionnaire— the opinion of difficulties in their solution, previous and missing knowledge of some students of three engineering careers of a state university in Chile. This research is completed with three case studies. The results favor the performance of students in solving problems of a fantasist and realistic context, but these do not guarantee mathematical skills which are necessary to solve non-routine problems of limit applications. In conclusion, through this research, it became clear that the students of the three engineerings do not have all the necessary skills to solve problems of application of the limit of a function of the real variable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=case%20studies" title="case studies">case studies</a>, <a href="https://publications.waset.org/abstracts/search?q=engineering%20program" title=" engineering program"> engineering program</a>, <a href="https://publications.waset.org/abstracts/search?q=limits" title=" limits"> limits</a>, <a href="https://publications.waset.org/abstracts/search?q=problem%20solving" title=" problem solving"> problem solving</a> </p> <a href="https://publications.waset.org/abstracts/115928/types-of-limit-application-problems-in-engineering-students-case-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/115928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4449</span> Evaluation of Earthquake Induced Cost for Mid-Rise Buildings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gulsah%20Olgun">Gulsah Olgun</a>, <a href="https://publications.waset.org/abstracts/search?q=Ozgur%20Bozdag"> Ozgur Bozdag</a>, <a href="https://publications.waset.org/abstracts/search?q=Yildirim%20Ertutar"> Yildirim Ertutar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper mainly focuses on performance assessment of buildings by associating the damage level with the damage cost. For this purpose a methodology is explained and applied to the representative mid-rise concrete building residing in Izmir. In order to consider uncertainties in occurrence of earthquakes, the structural analyses are conducted for all possible earthquakes in the region through the hazard curve. By means of the analyses, probability of the structural response being in different limit states are obtained and used to calculate expected damage cost. The expected damage cost comprises diverse cost components related to earthquake such as cost of casualties, replacement or repair cost of building etc. In this study, inter-story drift is used as an effective response variable to associate expected damage cost with different damage levels. The structural analysis methods performed to obtain inter story drifts are response spectrum method as a linear one, accurate push-over and time history methods to demonstrate the nonlinear effects on loss estimation. Comparison of the results indicates that each method provides similar values of expected damage cost. To sum up, this paper explains an approach which enables to minimize the expected damage cost of buildings and relate performance level to damage cost. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=expected%20damage%20cost" title="expected damage cost">expected damage cost</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20states" title=" limit states"> limit states</a>, <a href="https://publications.waset.org/abstracts/search?q=loss%20estimation" title=" loss estimation"> loss estimation</a>, <a href="https://publications.waset.org/abstracts/search?q=performance%20based%20design" title=" performance based design"> performance based design</a> </p> <a href="https://publications.waset.org/abstracts/57369/evaluation-of-earthquake-induced-cost-for-mid-rise-buildings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57369.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">269</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4448</span> Ambiguity in Anti-conversion Laws in the Indian States – A Limitation to the Freedom of Religion Guaranteed under the Constitution of India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roy%20Alex">Roy Alex</a>, <a href="https://publications.waset.org/abstracts/search?q=Dr.%20Shampa%20I%20Dev"> Dr. Shampa I Dev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Abstract Nine out of twenty-eight states in India have enacted anti-conversion laws to regulate religious conversions by use of force, allurement, inducement, or fraudulent means. The vagueness of the definitions of the terms used in these laws makes them inconsistent with the provisions of the right to freedom of religion guaranteed by the Constitution. It is a critical question whether these laws protect the religious freedom of groups that are “vulnerable” to missionary inducements, or are they restricting the freedom of citizens to propagate their religion to others or change their religious identity? This article looks into the constitutionality of the anti-conversion laws passed in the Indian States and argues that these laws limit the freedom of religion guaranteed under Article 25 of the Constitution of India. The ambiguity in the anti-conversion laws passed in various states of India is brought out by critically analyzing multiple cases charged under anti-conversion laws. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Freedom%20of%20Religion" title="Freedom of Religion">Freedom of Religion</a>, <a href="https://publications.waset.org/abstracts/search?q=Anti-conversion%20Laws" title=" Anti-conversion Laws"> Anti-conversion Laws</a>, <a href="https://publications.waset.org/abstracts/search?q=allurement" title=" allurement"> allurement</a>, <a href="https://publications.waset.org/abstracts/search?q=inducement" title=" inducement"> inducement</a>, <a href="https://publications.waset.org/abstracts/search?q=and%20fraudulent%20means." title=" and fraudulent means."> and fraudulent means.</a> </p> <a href="https://publications.waset.org/abstracts/154609/ambiguity-in-anti-conversion-laws-in-the-indian-states-a-limitation-to-the-freedom-of-religion-guaranteed-under-the-constitution-of-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154609.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">106</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4447</span> A Mathematical Based Prediction of the Forming Limit of Thin-Walled Sheet Metals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Masoud%20Ghermezi">Masoud Ghermezi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Studying the sheet metals is one of the most important research areas in the field of metal forming due to their extensive applications in the aerospace industries. A useful method for determining the forming limit of these materials and consequently preventing the rupture of sheet metals during the forming process is the use of the forming limit curve (FLC). In addition to specifying the forming limit, this curve also delineates a boundary for the allowed values of strain in sheet metal forming; these characteristics of the FLC along with its accuracy of computation and wide range of applications have made this curve the basis of research in the present paper. This study presents a new model that not only agrees with the results obtained from the above mentioned theory, but also eliminates its shortcomings. In this theory, like in the M-K theory, a thin sheet with an inhomogeneity as a gradient thickness reduction with a sinusoidal function has been chosen and subjected to two-dimensional stress. Through analytical evaluation, ultimately, a governing differential equation has been obtained. The numerical solution of this equation for the range of positive strains (stretched region) yields the results that agree with the results obtained from M-K theory. Also the solution of this equation for the range of negative strains (tension region) completes the FLC curve. The findings obtained by applying this equation on two alloys with the hardening exponents of 0.4 and 0.24 indicate the validity of the presented equation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sheet%20metal" title="sheet metal">sheet metal</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20forming" title=" metal forming"> metal forming</a>, <a href="https://publications.waset.org/abstracts/search?q=forming%20limit%20curve%20%28FLC%29" title=" forming limit curve (FLC)"> forming limit curve (FLC)</a>, <a href="https://publications.waset.org/abstracts/search?q=M-K%20theory" title=" M-K theory"> M-K theory</a> </p> <a href="https://publications.waset.org/abstracts/33928/a-mathematical-based-prediction-of-the-forming-limit-of-thin-walled-sheet-metals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4446</span> Effect of Testing Device Calibration on Liquid Limit Assessment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20O.%20Bayram">M. O. Bayram</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20B.%20Gencdal"> H. B. Gencdal</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20O.%20Fercan"> N. O. Fercan</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Basbug"> B. Basbug</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Liquid limit, which is used as a measure of soil strength, can be detected by Casagrande and fall-cone testing methods. The two methods majorly diverge from each other in terms of operator dependency. The Casagrande method that is applied according to ASTM D4318-17 standards may give misleading results, especially if the calibration process is not performed well. To reveal the effect of calibration for drop height and amount of soil paste placement in the Casagrande cup, a series of tests were carried out by multipoint method as it is specified in the ASTM standards. The tests include the combination of 6 mm, 8 mm, 10 mm, and 12 mm drop heights and under-filled, half-filled, and full-filled Casagrande cups by kaolinite samples. It was observed that during successive tests, the drop height of the cup deteriorated; hence the device was recalibrated before and after each test to provide the accuracy of the results. Besides, the tests by under-filled and full-filled samples for higher drop heights revealed lower liquid limit values than the lower drop heights revealed. For the half-filled samples, it was clearly seen that the liquid limit values didn’t change at all as the drop height increased, and this explains the function of standard specifications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calibration" title="calibration">calibration</a>, <a href="https://publications.waset.org/abstracts/search?q=casagrande%20cup%20method" title=" casagrande cup method"> casagrande cup method</a>, <a href="https://publications.waset.org/abstracts/search?q=drop%20height" title=" drop height"> drop height</a>, <a href="https://publications.waset.org/abstracts/search?q=kaolinite" title=" kaolinite"> kaolinite</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20limit" title=" liquid limit"> liquid limit</a>, <a href="https://publications.waset.org/abstracts/search?q=placing%20form" title=" placing form"> placing form</a> </p> <a href="https://publications.waset.org/abstracts/151571/effect-of-testing-device-calibration-on-liquid-limit-assessment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151571.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4445</span> Effect of Treated Peat Soil on the Plasticity Index and Hardening Time</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Siti%20Nur%20Aida%20Mario">Siti Nur Aida Mario</a>, <a href="https://publications.waset.org/abstracts/search?q=Farah%20Hafifee%20Ahmad"> Farah Hafifee Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Rudy%20Tawie"> Rudy Tawie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Soil Stabilization has been widely implemented in the construction industry nowadays. Peat soil is well known as one of the most problematic soil among the engineers. The procedures need to take into account both physical and engineering properties of the stabilized peat soil. This paper presents a result of plasticity index and hardening of treated peat soil with various dosage of additives. In order to determine plasticity of the treated peat soil, atterberg limit test which comprises plastic limit and liquid limit test has been conducted. Determination of liquid limit in this experimental study is by using cone penetrometer. Vicat testing apparatus has been used in the hardening test which the penetration of the plunger is recorded every one hour for 24 hours. The results show that the plasticity index of peat soil stabilized with 80% FAAC and 20% OPC has the lowest plasticity index and recorded the fastest initial setting time. The significant of this study is to promote greener solution for future soil stabilization industry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=additives" title="additives">additives</a>, <a href="https://publications.waset.org/abstracts/search?q=hardening" title=" hardening"> hardening</a>, <a href="https://publications.waset.org/abstracts/search?q=peat%20soil" title=" peat soil"> peat soil</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity%20index" title=" plasticity index"> plasticity index</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20stabilization" title=" soil stabilization"> soil stabilization</a> </p> <a href="https://publications.waset.org/abstracts/44907/effect-of-treated-peat-soil-on-the-plasticity-index-and-hardening-time" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44907.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4444</span> Double Beta Decay Experiments in Novi Sad</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nata%C5%A1a%20Todorovi%C4%87">Nataša Todorović</a>, <a href="https://publications.waset.org/abstracts/search?q=Jovana%20Nikolov"> Jovana Nikolov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Despite the great interest in β⁻β⁻ decay, β⁺β⁺ decays are rarely investigated due to the low probability of detecting these processes with available low-level equipment. If β⁺β⁺, β⁺EC, or ECEC decay occurs in a thin sample of a material, the positrons will be stopped and annihilated inside the material, leading to the emission of two or four coincidence gamma photons energy of 511 keV. The paper presents the results of measurements of double beta decay of ⁶⁴Zn, ⁵⁰Cr, and ⁵⁴Fe isotopes. In the first experiment, 511-keV gamma rays originating from the annihilation of positrons in natural zinc were measured by a coincidence technique to obtain a non-zero value for the (0ν+2ν) half-life. In the second experiment, the result of measuring double beta decay of ⁵⁰Cr is presented, which suggests a result other than zero at 95% CL and gives the lowest limit for the half-life of this process. In the third experiment, neutrino-less ECEC decay of ⁵⁴Fe was examined. Under the decay theory, gamma rays are emitted whose energy does not coincide with the energies of gamma rays emitted by nuclei from known discrete excited states. Iron shield of an internal volume of 1 m³ and thickness of 25 cm served as a source for measuring the (0ν+2ν) process in ⁵⁴Fe, whose yield in natural iron is 5.4%. We obtain the lower limit for the half-life for ⁵⁴Fe: T(0ν, K, K)>4.4x10²⁰ yr, T(0ν, K, L)>4.1x10²⁰ yr, and T(0ν, L, L)>5.0x10²⁰ yr. For ⁵⁰Cr limit for the half-life is T(0ν+2ν)>1.3(6)x10¹⁸ yr, and for ⁶⁴Zn T(0ν+2ν, ECβ+)=1.1(0.9)x10⁹ years. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neutrinoless%20double%20beta%20decay" title="neutrinoless double beta decay">neutrinoless double beta decay</a>, <a href="https://publications.waset.org/abstracts/search?q=half-life" title=" half-life"> half-life</a>, <a href="https://publications.waset.org/abstracts/search?q=%E2%81%B6%E2%81%B4Zn" title=" ⁶⁴Zn"> ⁶⁴Zn</a>, <a href="https://publications.waset.org/abstracts/search?q=%E2%81%B5%E2%81%B0Cr" title=" ⁵⁰Cr"> ⁵⁰Cr</a>, <a href="https://publications.waset.org/abstracts/search?q=and" title=" and"> and</a>, <a href="https://publications.waset.org/abstracts/search?q=%E2%81%B5%E2%81%B4Fe" title=" ⁵⁴Fe"> ⁵⁴Fe</a> </p> <a href="https://publications.waset.org/abstracts/152564/double-beta-decay-experiments-in-novi-sad" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152564.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">108</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=limit%20states&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=limit%20states&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=limit%20states&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=limit%20states&page=5">5</a></li> <li class="page-item"><a class="page-link" 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