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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> 5850</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: horizontal boring tool</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5850</span> An Optimization of Machine Parameters for Modified Horizontal Boring Tool Using Taguchi Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thirasak%20Panyaphirawat">Thirasak Panyaphirawat</a>, <a href="https://publications.waset.org/abstracts/search?q=Pairoj%20Sapsmarnwong"> Pairoj Sapsmarnwong</a>, <a href="https://publications.waset.org/abstracts/search?q=Teeratas%20Pornyungyuen"> Teeratas Pornyungyuen </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the findings of an experimental investigation of important machining parameters for the horizontal boring tool modified to mouth with a horizontal lathe machine to bore an overlength workpiece. In order to verify a usability of a modified tool, design of experiment based on Taguchi method is performed. The parameters investigated are spindle speed, feed rate, depth of cut and length of workpiece. Taguchi L9 orthogonal array is selected for four factors three level parameters in order to minimize surface roughness (Ra and Rz) of S45C steel tubes. Signal to noise ratio analysis and analysis of variance (ANOVA) is performed to study an effect of said parameters and to optimize the machine setting for best surface finish. The controlled factors with most effect are depth of cut, spindle speed, length of workpiece, and feed rate in order. The confirmation test is performed to test the optimal setting obtained from Taguchi method and the result is satisfactory. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20of%20experiment" title="design of experiment">design of experiment</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi%20design" title=" Taguchi design"> Taguchi design</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis%20of%20variance" title=" analysis of variance"> analysis of variance</a>, <a href="https://publications.waset.org/abstracts/search?q=machining%20parameters" title=" machining parameters"> machining parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20boring%20tool" title=" horizontal boring tool"> horizontal boring tool</a> </p> <a href="https://publications.waset.org/abstracts/12992/an-optimization-of-machine-parameters-for-modified-horizontal-boring-tool-using-taguchi-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12992.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">444</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">5849</span> Simulation of Particle Damping in Boring Tool Using Combined Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Chockalingam">S. Chockalingam</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Natarajan"> U. Natarajan</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20M.%20Santhoshsarang"> D. M. Santhoshsarang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Particle damping is a promising vibration attenuating technique in boring tool than other type of damping with minimal effect on the strength, rigidity and stiffness ratio of the machine tool structure. Due to the cantilever nature of boring tool holder in operations, it suffers chatter when the slenderness ratio of the tool gets increased. In this study, Copper-Stainless steel (SS) particles were packed inside the boring tool which acts as a damper. Damper suppresses chatter generated during machining and also improves the machining efficiency of the tool with better slenderness ratio. In the first approach of particle damping, combined Cu-SS particles were packed inside the vibrating tool, whereas Copper and Stainless steel particles were selected separately and packed inside another tool and their effectiveness was analysed in this simulation. This study reveals that the efficiency of finite element simulation of the boring tools when equipped with particles such as copper, stainless steel and a combination of both. In this study, the newly modified boring tool holder with particle damping was simulated using ANSYS12.0 with and without particles. The aim of this study is to enhance the structural rigidity through particle damping thus avoiding the occurrence of resonance in the boring tool during machining. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boring%20bar" title="boring bar">boring bar</a>, <a href="https://publications.waset.org/abstracts/search?q=copper-stainless%20steel" title=" copper-stainless steel"> copper-stainless steel</a>, <a href="https://publications.waset.org/abstracts/search?q=chatter" title=" chatter"> chatter</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20damping" title=" particle damping"> particle damping</a> </p> <a href="https://publications.waset.org/abstracts/28966/simulation-of-particle-damping-in-boring-tool-using-combined-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28966.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">465</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">5848</span> Chatter Suppression in Boring Process Using Passive Damper</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20Prasannavenkadesan">V. Prasannavenkadesan</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Elango"> A. Elango</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Chockalingam"> S. Chockalingam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During machining process, chatter is an unavoidable phenomenon. Boring bars possess the cantilever shape and due to this, it is subjected to chatter. The adverse effect of chatter includes the increase in temperature which will leads to excess tool wear. To overcome these problems, in this investigation, Cartridge brass (Cu – 70% and Zn – 30%) is passively fixed on the boring bar and also clearance is provided in order to reduce the displacement, tool wear and cutting temperature. A conventional all geared lathe is attached with vibrometer and pyrometer is used to measure the displacement and temperature. The influence of input parameters such as cutting speed, depth of cut and clearance on temperature, tool wear and displacement are investigated for various cutting conditions. From the result, the optimum conditions to obtain better damping in boring process for chatter reduction is identified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boring" title="boring">boring</a>, <a href="https://publications.waset.org/abstracts/search?q=chatter" title=" chatter"> chatter</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20damping" title=" mass damping"> mass damping</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20damping" title=" passive damping"> passive damping</a> </p> <a href="https://publications.waset.org/abstracts/40957/chatter-suppression-in-boring-process-using-passive-damper" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40957.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">5847</span> Comparison between the Performances of Different Boring Bars in the Internal Turning of Long Overhangs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wallyson%20Thomas">Wallyson Thomas</a>, <a href="https://publications.waset.org/abstracts/search?q=Zsombor%20Fulop"> Zsombor Fulop</a>, <a href="https://publications.waset.org/abstracts/search?q=Attila%20%20Szilagyi"> Attila Szilagyi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Impact dampers are mainly used in the metal-mechanical industry in operations that generate too much vibration in the machining system. Internal turning processes become unstable during the machining of deep holes, in which the tool holder is used with long overhangs (high length-to-diameter ratios). The devices coupled with active dampers, are expensive and require the use of advanced electronics. On the other hand, passive impact dampers (PID – Particle Impact Dampers) are cheaper alternatives that are easier to adapt to the machine’s fixation system, once that, in this last case, a cavity filled with particles is simply added to the structure of the tool holder. The cavity dimensions and the diameter of the spheres are pre-determined. Thus, when passive dampers are employed during the machining process, the vibration is transferred from the tip of the tool to the structure of the boring bar, where it is absorbed by the fixation system. This work proposes to compare the behaviors of a conventional solid boring bar and a boring bar with a passive impact damper in turning while using the highest possible L/D (length-to-diameter ratio) of the tool and an Easy Fix fixation system (also called: Split Bushing Holding System). It is also intended to optimize the impact absorption parameters, as the filling percentage of the cavity and the diameter of the spheres. The test specimens were made of hardened material and machined in a Computer Numerical Control (CNC) lathe. The laboratory tests showed that when the cavity of the boring bar is totally filled with minimally spaced spheres of the largest diameter, the gain in absorption allowed of obtaining, with an L/D equal to 6, the same surface roughness obtained when using the solid boring bar with an L/D equal to 3.4. The use of the passive particle impact damper resulted in, therefore, increased static stiffness and reduced deflexion of the tool. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20damper" title="active damper">active damper</a>, <a href="https://publications.waset.org/abstracts/search?q=fixation%20system" title=" fixation system"> fixation system</a>, <a href="https://publications.waset.org/abstracts/search?q=hardened%20material" title=" hardened material"> hardened material</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20damper" title=" passive damper "> passive damper </a> </p> <a href="https://publications.waset.org/abstracts/124361/comparison-between-the-performances-of-different-boring-bars-in-the-internal-turning-of-long-overhangs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124361.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">230</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">5846</span> Tool Wear Monitoring of High Speed Milling Based on Vibratory Signal Processing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadjadj%20Abdechafik">Hadjadj Abdechafik</a>, <a href="https://publications.waset.org/abstracts/search?q=Kious%20Mecheri"> Kious Mecheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Ameur%20Aissa"> Ameur Aissa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to develop a process of treatment of the vibratory signals generated during a horizontal high speed milling process without applying any coolant in order to establish a monitoring system able to improve the machining performance. Thus, many tests were carried out on the horizontal high speed centre (PCI Météor 10), in given cutting conditions, by using a milling cutter with only one insert and measured its frontal wear from its new state that is considered as a reference state until a worn state that is considered as unsuitable for the tool to be used. The results obtained show that the first harmonic follow well the evolution of frontal wear, on another hand a wavelet transform is used for signal processing and is found to be useful for observing the evolution of the wavelet approximations through the cutting tool life. The power and the Root Mean Square (RMS) values of the wavelet transformed signal gave the best results and can be used for tool wear estimation. All this features can constitute the suitable indicators for an effective detection of tool wear and then used for the input parameters of an online monitoring system. Although we noted the remarkable influence of the machining cycle on the quality of measurements by the introduction of a bias on the signal, this phenomenon appears in particular in horizontal milling and in the majority of studies is ignored. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flank%20wear" title="flank wear">flank wear</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration" title=" vibration"> vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=milling" title=" milling"> milling</a>, <a href="https://publications.waset.org/abstracts/search?q=signal%20processing" title=" signal processing"> signal processing</a>, <a href="https://publications.waset.org/abstracts/search?q=monitoring" title=" monitoring"> monitoring</a> </p> <a href="https://publications.waset.org/abstracts/6901/tool-wear-monitoring-of-high-speed-milling-based-on-vibratory-signal-processing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6901.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">602</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">5845</span> Laser-Hole Boring into Overdense Targets: A Detailed Study on Laser and Target Properties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Florian%20Wagner">Florian Wagner</a>, <a href="https://publications.waset.org/abstracts/search?q=Christoph%20Schmidt"> Christoph Schmidt</a>, <a href="https://publications.waset.org/abstracts/search?q=Vincent%20Bagnoud"> Vincent Bagnoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Understanding the interaction of ultra-intense laser pulses with overcritical targets is of major interest for many applications such as laser-driven ion acceleration, fast ignition in the frame of inertial confinement fusion or high harmonic generation and the creation of attosecond pulses. One particular aspect of this interaction is the shift of the critical surface, where the laser pulse is stopped and the absorption is at maximum, due to the radiation pressure induced by the laser pulse, also referred to as laser hole boring. We investigate laser-hole boring experimentally by measuring the backscattered spectrum which is doppler-broadened because of the movement of the reflecting surface. Using the high-power, high-energy laser system PHELIX in Darmstadt, we gathered an extensive set of data for different laser intensities ranging from 10^18 W/cm2 to 10^21 W/cm2, two different levels of the nanosecond temporal contrast (10^6 vs. 10^11), elliptical and linear polarization and varying target configurations. In this contribution we discuss how the maximum velocity of the critical surface depends on these parameters. In particular we show that by increasing the temporal contrast the maximum hole boring velocity is decreased by more than a factor of three. Our experimental findings are backed by a basic analytical model based on momentum and mass conservation as well as particle in cell simulations. These results are of particular importance for fast ignition since they contribute to a better understanding of the transport of the ignitor pulse into the overdense region. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser-hole%20boring" title="laser-hole boring">laser-hole boring</a>, <a href="https://publications.waset.org/abstracts/search?q=interaction%20of%20ultra-intense%20lasers%20with%20overcritical%20targets" title=" interaction of ultra-intense lasers with overcritical targets"> interaction of ultra-intense lasers with overcritical targets</a>, <a href="https://publications.waset.org/abstracts/search?q=fast%20ignition" title=" fast ignition"> fast ignition</a>, <a href="https://publications.waset.org/abstracts/search?q=relativistic%20laser%20motter%20interaction" title=" relativistic laser motter interaction"> relativistic laser motter interaction</a> </p> <a href="https://publications.waset.org/abstracts/45345/laser-hole-boring-into-overdense-targets-a-detailed-study-on-laser-and-target-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45345.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">416</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">5844</span> Design and Validation of an Aerodynamic Model of the Cessna Citation X Horizontal Stabilizer Using both OpenVSP and Digital Datcom</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marine%20Segui">Marine Segui</a>, <a href="https://publications.waset.org/abstracts/search?q=Matthieu%20Mantilla"> Matthieu Mantilla</a>, <a href="https://publications.waset.org/abstracts/search?q=Ruxandra%20Mihaela%20Botez"> Ruxandra Mihaela Botez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research is the part of a major project at the Research Laboratory in Active Controls, Avionics and Aeroservoelasticity (LARCASE) aiming to improve a Cessna Citation X aircraft cruise performance with an application of the morphing wing technology on its horizontal tail. However, the horizontal stabilizer of the Cessna Citation X turns around its span axis with an angle between -8 and 2 degrees. Within this range, the horizontal stabilizer generates certainly some unwanted drag. To cancel this drag, the LARCASE proposes to trim the aircraft with a horizontal stabilizer equipped by a morphing wing technology. This technology aims to optimize aerodynamic performances by changing the conventional horizontal tail shape during the flight. As a consequence, this technology will be able to generate enough lift on the horizontal tail to balance the aircraft without an unwanted drag generation. To conduct this project, an accurate aerodynamic model of the horizontal tail is firstly required. This aerodynamic model will finally allow precise comparison between a conventional horizontal tail and a morphed horizontal tail results. This paper presents how this aerodynamic model was designed. In this way, it shows how the 2D geometry of the horizontal tail was collected and how the unknown airfoil’s shape of the horizontal tail has been recovered. Finally, the complete horizontal tail airfoil shape was found and a comparison between aerodynamic polar of the real horizontal tail and the horizontal tail found in this paper shows a maximum difference of 0.04 on the lift or the drag coefficient which is very good. Aerodynamic polar data of the aircraft horizontal tail are obtained from the CAE Inc. level D research aircraft flight simulator of the Cessna Citation X. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerodynamic" title="aerodynamic">aerodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=Cessna" title=" Cessna"> Cessna</a>, <a href="https://publications.waset.org/abstracts/search?q=citation" title=" citation"> citation</a>, <a href="https://publications.waset.org/abstracts/search?q=coefficient" title=" coefficient"> coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=Datcom" title=" Datcom"> Datcom</a>, <a href="https://publications.waset.org/abstracts/search?q=drag" title=" drag"> drag</a>, <a href="https://publications.waset.org/abstracts/search?q=lift" title=" lift"> lift</a>, <a href="https://publications.waset.org/abstracts/search?q=longitudinal" title=" longitudinal"> longitudinal</a>, <a href="https://publications.waset.org/abstracts/search?q=model" title=" model"> model</a>, <a href="https://publications.waset.org/abstracts/search?q=OpenVSP" title=" OpenVSP"> OpenVSP</a> </p> <a href="https://publications.waset.org/abstracts/84863/design-and-validation-of-an-aerodynamic-model-of-the-cessna-citation-x-horizontal-stabilizer-using-both-openvsp-and-digital-datcom" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84863.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">379</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">5843</span> A Numerical Investigation of Segmental Lining Joints Interactions in Tunnels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Ahmadi">M. H. Ahmadi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Mortazavi"> A. Mortazavi</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Zarei"> H. Zarei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Several authors have described the main mechanism of formation of cracks in the segment lining during the construction of tunnels with tunnel boring machines. A comprehensive analysis of segmental lining joints may help to guarantee a safe construction during Tunneling and serviceable stages. The most frequent types of segment damage are caused by a condition of uneven segment matching due to contact deficiencies. This paper investigated the interaction mechanism of precast concrete lining joints in tunnels. The Discrete Element Method (DEM) was used to analyze a typical segmental lining model consisting of six segment rings. In the analyses, typical segmental lining design parameters of the Ghomrood water conveyance tunnel, Iran were employed in the study. In the conducted analysis, the worst-case scenario of loading faced during the boring of Ghomrood tunnel was considered. This was associated with the existence of a crushed zone dipping at 75 degree at the location of the key segment. In the analysis, moreover, the effect of changes in horizontal stress ratio on the loads on the segment was assessed. The boundary condition associated with K (ratio of the horizontal to the vertical stress) values of 0.5, 1, 1.5 and 2 were applied to the model and separate analysis was conducted for each case. Important parameters such as stress, moments, and displacements were measured at joint locations and the surrounding rock. Accordingly, the segment joint interactions were assessed and analyzed. Moreover, rock mass properties of the Ghomrood in Ghom were adopted. In this study, the load acting on segments joints are included a crushed zone stratum force that intersect tunnel with 75 slopes in the location of the key segment, gravity force of segments and earth pressures. A numerical investigation was used for different coefficients of stress concentration of 0.5, 1, 1.5, 2 and different geological conditions of saturated crushed zone under the critical scenario. The numerical results also demonstrate that maximum bending moments in longitudinal joints occurred for crushed zone with the weaken strengths (Sandstone). Besides that, increasing the load in segment-stratum interfaces affected radial stress in longitudinal joints and finally the opening of joints occurred. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=joint" title="joint">joint</a>, <a href="https://publications.waset.org/abstracts/search?q=interface" title=" interface"> interface</a>, <a href="https://publications.waset.org/abstracts/search?q=segment" title=" segment"> segment</a>, <a href="https://publications.waset.org/abstracts/search?q=contact" title=" contact"> contact</a> </p> <a href="https://publications.waset.org/abstracts/38469/a-numerical-investigation-of-segmental-lining-joints-interactions-in-tunnels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38469.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">261</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">5842</span> Investigation of Riders' Path on Horizontal Curves</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lemonakis%20Panagiotis">Lemonakis Panagiotis</a>, <a href="https://publications.waset.org/abstracts/search?q=Eliou%20Nikos"> Eliou Nikos</a>, <a href="https://publications.waset.org/abstracts/search?q=Karakasidis%20Theodoros"> Karakasidis Theodoros</a>, <a href="https://publications.waset.org/abstracts/search?q=Botzoris%20George"> Botzoris George</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is well known that trajectory along with speed are two of the most important contributing factors in road accidents. Trajectory is meant as the "line“, usually different from the center-line that a driver traverses through horizontal curves which depends on the characteristics of the road environment (especially the curvature), the vehicle and the driver himself. Drivers and especially riders, tend to broaden their paths in order to succeed greater path radiuses and hence, reduce the applied centrifugal force enhancing safety. The objective of the present research is to investigate riders’ path on horizontal curves. Within the context of the research, field measurements were conducted on a rural two lane highway, with the participation of eight riders and the use of an instrumented motorcycle. The research has shown that the trajectory of the riders is correlated to the radius and the length of the horizontal curve as well. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=trajectory" title="trajectory">trajectory</a>, <a href="https://publications.waset.org/abstracts/search?q=path" title=" path"> path</a>, <a href="https://publications.waset.org/abstracts/search?q=riders" title=" riders"> riders</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20curves" title=" horizontal curves"> horizontal curves</a> </p> <a href="https://publications.waset.org/abstracts/5089/investigation-of-riders-path-on-horizontal-curves" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5089.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">347</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">5841</span> Droplet Entrainment and Deposition in Horizontal Stratified Two-Phase Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joshua%20Kim%20Schimpf">Joshua Kim Schimpf</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyun%20Doo%20Kim"> Kyun Doo Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaseok%20Heo"> Jaseok Heo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the droplet behavior of under horizontal stratified flow regime for air and water flow in horizontal pipe experiments from a 0.24 m, 0.095 m, and 0.0486 m size diameter pipe are examined. The effects of gravity, pipe diameter, and turbulent diffusion on droplet deposition are considered. Models for droplet entrainment and deposition are proposed that considers developing length. Validation for experimental data dedicated from the REGARD, CEA and Williams, University of Illinois, experiment were performed using SPACE (Safety and Performance Analysis Code for Nuclear Power Plants). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=droplet" title="droplet">droplet</a>, <a href="https://publications.waset.org/abstracts/search?q=entrainment" title=" entrainment"> entrainment</a>, <a href="https://publications.waset.org/abstracts/search?q=deposition" title=" deposition"> deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal" title=" horizontal"> horizontal</a> </p> <a href="https://publications.waset.org/abstracts/66543/droplet-entrainment-and-deposition-in-horizontal-stratified-two-phase-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66543.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">5840</span> Analysis Mechanized Boring (TBM) of Tehran Subway Line 7</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shahin%20Shabani">Shahin Shabani</a>, <a href="https://publications.waset.org/abstracts/search?q=Pouya%20Pourmadadi"> Pouya Pourmadadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tunnel boring machines (TBMs) have been used for the construction of various tunnels for mining projects for the purpose of access, conveyance of ore and waste, drainage, exploration, water supply and water diversion. Several mining projects have seen the successful and economic beneficial use of TBMs, and there is an increasing awareness of the benefits of TBMs for mining projects. Key technical considerations for the use of TBMs for the construction of tunnels for mining projects include geological issues (rock type, rock alteration, rock strength, rock abrasivity, durability, ground water inflows), depth of cover and the potential for overstressing/rockbursts, site access and terrain, portal locations, TBM constraints, minimum tunnel size, tunnel support requirements, contractor and labor experience, and project schedule demands. This study focuses on tunnelling mining, with the goal to develop methods and tools to be used to gain understanding of these processes, and to analyze metro of Tehran. The Metro Line 7 of Tehran is one of the Longest (26 Km) and deepest (27m) of projects that’s under implementation. Because of major differences like passing under all geotechnical layers of the town and encountering part of it with underground water table and also using mechanized excavation system, is one of special metro projects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TBM" title="TBM">TBM</a>, <a href="https://publications.waset.org/abstracts/search?q=tunnel%20boring%20machines%20economic" title=" tunnel boring machines economic"> tunnel boring machines economic</a>, <a href="https://publications.waset.org/abstracts/search?q=metro" title=" metro"> metro</a>, <a href="https://publications.waset.org/abstracts/search?q=line%207" title=" line 7"> line 7</a> </p> <a href="https://publications.waset.org/abstracts/35487/analysis-mechanized-boring-tbm-of-tehran-subway-line-7" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35487.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">387</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">5839</span> Proposal of Construction Management for Tunneling through Serpentine Rock Based on Data Obtained by Borings in Advance of Excavation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hirokazu%20Sasaki">Hirokazu Sasaki</a>, <a href="https://publications.waset.org/abstracts/search?q=Shunji%20Kanie">Shunji Kanie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is broadly known that the construction of tunnels through serpentine rock frequently encounters difficulties in keeping the construction schedule because the excavated shape of the tunnel cannot be maintained as planned due to the high expansion pressure of the serpentinite rock caused by excavation. Therefore, the tunnel lining is deformed due to large pressure, and the shoring patterns should be modified according to the properties of serpentine rock while the main excavation is undergoing. It often causes delays in the construction period and increases in the cost. For this reason, advanced borings which are the boring heading forward in advance of the main excavation are carried out, and the characteristics of the serpentinite rock are examined for their mechanical behaviors before the main excavation. However, the data obtained by the advanced borings are not fully utilized for construction management. This paper analyzes the data obtained from advanced boring at the multiple construction sites of tunnels through serpentine rock in Hokkaido, Japan. It aims to propose an appropriate construction management method to evaluate the construction period and the cost under the main excavation based on the data obtained by the advanced boring. In this study, the records of three tunnels penetrated through serpentine rocks in Hokkaido were analyzed based on 41 advanced borings. The advanced borings provide the records of boring pressure, perforated length in forward, and an abundance of serpentinite rock in the sample core, as well as their forms of existence such as lumpy, leafy, or clay-like shapes. In addition, the displacements of the excavated surfaces of the tunnels during excavation are recorded with data at the corresponding location of the advanced boring. After the excavation of the tunnel, the displacements of the inner surface of the tunnels are observed to confirm the convergence in deformation. Since the thickness of the rock cover above the tunnel is different from each other as well as the forms of existence of serpentine, there are large variations in the amount of displacement of the inner surface among these tunnels. In addition, the convergence times in the displacement are also different from each other. The authors thought that those differences could be predicted by the perforating data of the advanced boring as well as the abundance of serpentinite rock with their forms of existence. The authors conducted a statistical study to correlate the displacement of the excavated surface and the time for convergence in displacement, which are the most important factors in determining the tunnel shoring pattern. Specifically, the authors verified the relations between the perforated length of advanced borings, the clumping rate of serpentinite rock, and the amount of internal displacement of the tunnel. It is confirmed that those relationships are very helpful in deciding the required shoring pattern and useful in predicting the convergence time in displacement. This research makes it possible to evaluate the whole construction period, even under the main excavation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tunneling" title="tunneling">tunneling</a>, <a href="https://publications.waset.org/abstracts/search?q=serpentine%20rock" title=" serpentine rock"> serpentine rock</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20management" title=" construction management"> construction management</a>, <a href="https://publications.waset.org/abstracts/search?q=advanced%20boring" title=" advanced boring"> advanced boring</a>, <a href="https://publications.waset.org/abstracts/search?q=deformation%20of%20the%20tunnel" title=" deformation of the tunnel"> deformation of the tunnel</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20period" title=" construction period"> construction period</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20cost" title=" construction cost"> construction cost</a> </p> <a href="https://publications.waset.org/abstracts/199055/proposal-of-construction-management-for-tunneling-through-serpentine-rock-based-on-data-obtained-by-borings-in-advance-of-excavation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/199055.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">1</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">5838</span> Value Creation by Sustainable Supply Chain Horizontal Integration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ananth%20Malali">Ananth Malali</a>, <a href="https://publications.waset.org/abstracts/search?q=Rohan%20Prasad"> Rohan Prasad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ananth%20Revankar"> Ananth Revankar</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiranth%20Hulgur"> Chiranth Hulgur</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper aims to show evidence that value creation by sustainable methods is achieved when a relation is shared with a sustainability attribute between two or more companies in every stage of the supply chain. The pillars of this paper, the value creation factors, attributes of sustainability and various relations that exist between firms in a horizontally integrated supply chain are defined. Further, a relational analysis was done using a simple analysis tool built based on research. Couple of case studies from the German manufacturing and Australian retail sectors were considered for the intra industry analysis and comparison. Taking the analysis ahead, for inter-industry comparison, the same cases were scrutinised in order to understand how the sustainability attributes change across each industry. Concluding, this paper gives an overview of how companies can plan their strategies to attain sustainability through horizontal integration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=horizontal%20integration" title="horizontal integration">horizontal integration</a>, <a href="https://publications.waset.org/abstracts/search?q=value%20creation" title=" value creation"> value creation</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20supply%20chain" title=" sustainable supply chain"> sustainable supply chain</a> </p> <a href="https://publications.waset.org/abstracts/29601/value-creation-by-sustainable-supply-chain-horizontal-integration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29601.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">609</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">5837</span> Quality Evaluation of Backfill Grout in Tunnel Boring Machine Tail Void Using Impact-Echo (IE): Short-Time Fourier Transform (STFT) Numerical Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ju-Young%20Choi">Ju-Young Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ki-Il%20Song"> Ki-Il Song</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyoung-Yul%20Kim"> Kyoung-Yul Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During Tunnel Boring Machine (TBM) tunnel excavation, backfill grout should be injected after the installation of segment lining to ensure the stability of the tunnel and to minimize ground deformation. If grouting is not sufficient to fill the gap between the segments and rock mass, hydraulic pressures occur in the void, which can negatively influence the stability of the tunnel. Recently the tendency to use TBM tunnelling method to replace the drill and blast(NATM) method is increasing. However, there are only a few studies of evaluation of backfill grout. This study evaluates the TBM tunnel backfill state using Impact-Echo(IE). 3-layers, segment-grout-rock mass, are simulated by FLAC 2D, FDM-based software. The signals obtained from numerical analysis and IE test are analyzed by Short-Time Fourier Transform(STFT) in time domain, frequency domain, and time-frequency domain. The result of this study can be used to evaluate the quality of backfill grouting in tail void. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tunnel%20boring%20machine" title="tunnel boring machine">tunnel boring machine</a>, <a href="https://publications.waset.org/abstracts/search?q=backfill%20grout" title=" backfill grout"> backfill grout</a>, <a href="https://publications.waset.org/abstracts/search?q=impact-echo%20method" title=" impact-echo method"> impact-echo method</a>, <a href="https://publications.waset.org/abstracts/search?q=time-frequency%20domain%20analysis" title=" time-frequency domain analysis"> time-frequency domain analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20difference%20method" title=" finite difference method"> finite difference method</a> </p> <a href="https://publications.waset.org/abstracts/53362/quality-evaluation-of-backfill-grout-in-tunnel-boring-machine-tail-void-using-impact-echo-ie-short-time-fourier-transform-stft-numerical-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53362.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">273</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">5836</span> Estimating Tree Height and Forest Classification from Multi Temporal Risat-1 HH and HV Polarized Satellite Aperture Radar Interferometric Phase Data</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saurav%20Kumar%20Suman">Saurav Kumar Suman</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Karthigayani"> P. Karthigayani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper the height of the tree is estimated and forest types is classified from the multi temporal RISAT-1 Horizontal-Horizontal (HH) and Horizontal-Vertical (HV) Polarised Satellite Aperture Radar (SAR) data. The novelty of the proposed project is combined use of the Back-scattering Coefficients (Sigma Naught) and the Coherence. It uses Water Cloud Model (WCM). The approaches use two main steps. (a) Extraction of the different forest parameter data from the Product.xml, BAND-META file and from Grid-xxx.txt file come with the HH & HV polarized data from the ISRO (Indian Space Research Centre). These file contains the required parameter during height estimation. (b) Calculation of the Vegetation and Ground Backscattering, Coherence and other Forest Parameters. (c) Classification of Forest Types using the ENVI 5.0 Tool and ROI (Region of Interest) calculation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RISAT-1" title="RISAT-1">RISAT-1</a>, <a href="https://publications.waset.org/abstracts/search?q=classification" title=" classification"> classification</a>, <a href="https://publications.waset.org/abstracts/search?q=forest" title=" forest"> forest</a>, <a href="https://publications.waset.org/abstracts/search?q=SAR%20data" title=" SAR data"> SAR data</a> </p> <a href="https://publications.waset.org/abstracts/13924/estimating-tree-height-and-forest-classification-from-multi-temporal-risat-1-hh-and-hv-polarized-satellite-aperture-radar-interferometric-phase-data" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13924.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">408</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">5835</span> Optimization of the Aerodynamic Performances of an Unmanned Aerial Vehicle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fares%20Senouci">Fares Senouci</a>, <a href="https://publications.waset.org/abstracts/search?q=Bachir%20Imine"> Bachir Imine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This document provides numerical and experimental optimization of the aerodynamic performance of a drone equipped with three types of horizontal stabilizer. To build this optimal configuration, an experimental and numerical study was conducted on three parameters: the geometry of the stabilizer (horizontal form or reverse V form), the position of the horizontal stabilizer (up or down), and the landing gear position (closed or open). The results show that up-stabilizer position with respect to the horizontal plane of the fuselage provides better aerodynamic performance, and that the landing gear increases the lift in the zone of stability, that is to say where the flow is not separated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerodynamics" title="aerodynamics">aerodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=drag" title=" drag"> drag</a>, <a href="https://publications.waset.org/abstracts/search?q=lift" title=" lift"> lift</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulence%20model" title=" turbulence model"> turbulence model</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20tunnel" title=" wind tunnel"> wind tunnel</a> </p> <a href="https://publications.waset.org/abstracts/68885/optimization-of-the-aerodynamic-performances-of-an-unmanned-aerial-vehicle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68885.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">258</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">5834</span> Horizontal Circular Curve Computations Using a Developed Calculator</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adil%20Hassabo">Adil Hassabo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a horizontal circular curve computations calculator is developed in Microsoft Windows. The developed calculator can be used for determining the necessary information required for setting out horizontal curves. Three methods are applied in the developed program namely: incremental chord method, total chord method, and the coordinates method. Computations of horizontal curves by the developed calculator is faster, easier, accurate, and less subject to errors comparable to the traditional method of calculations. Finally, the results obtained by the traditional method and by the developed calculator are presented for checking the behavior of the developed calculator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calculator" title="calculator">calculator</a>, <a href="https://publications.waset.org/abstracts/search?q=circular" title=" circular"> circular</a>, <a href="https://publications.waset.org/abstracts/search?q=computations" title=" computations"> computations</a>, <a href="https://publications.waset.org/abstracts/search?q=curve" title=" curve"> curve</a> </p> <a href="https://publications.waset.org/abstracts/91621/horizontal-circular-curve-computations-using-a-developed-calculator" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91621.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">167</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">5833</span> Neural Network Monitoring Strategy of Cutting Tool Wear of Horizontal High Speed Milling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kious%20Mecheri">Kious Mecheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Hadjadj%20Abdechafik"> Hadjadj Abdechafik</a>, <a href="https://publications.waset.org/abstracts/search?q=Ameur%20Aissa"> Ameur Aissa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The wear of cutting tool degrades the quality of the product in the manufacturing processes. The online monitoring of the cutting tool wear level is very necessary to prevent the deterioration of the quality of machining. Unfortunately there is not a direct manner to measure the cutting tool wear online. Consequently we must adopt an indirect method where wear will be estimated from the measurement of one or more physical parameters appearing during the machining process such as the cutting force, the vibrations, or the acoustic emission etc. In this work, a neural network system is elaborated in order to estimate the flank wear from the cutting force measurement and the cutting conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flank%20wear" title="flank wear">flank wear</a>, <a href="https://publications.waset.org/abstracts/search?q=cutting%20forces" title=" cutting forces"> cutting forces</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20speed%20milling" title=" high speed milling"> high speed milling</a>, <a href="https://publications.waset.org/abstracts/search?q=signal%20processing" title=" signal processing"> signal processing</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20network" title=" neural network"> neural network</a> </p> <a href="https://publications.waset.org/abstracts/6906/neural-network-monitoring-strategy-of-cutting-tool-wear-of-horizontal-high-speed-milling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6906.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">397</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">5832</span> Analytical and Numerical Study of Formation of Sporadic E Layer with Taking into Account Horizontal and Vertical In-Homogeneity of the Horizontal Wind </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Giorgi%20Dalakishvili">Giorgi Dalakishvili</a>, <a href="https://publications.waset.org/abstracts/search?q=Goderdzi%20G.%20Didebulidze"> Goderdzi G. Didebulidze</a>, <a href="https://publications.waset.org/abstracts/search?q=Maya%20Todua"> Maya Todua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The possibility of sporadic E (Es) layer formation in the mid-latitude nighttime lower thermosphere by horizontal homogeneous and inhomogeneous (vertically and horizontally changing) winds is investigated in 3D by analytical and numerical solutions of continuity equation for dominant heavy metallic ions Fe+. The theory of influence of wind velocity direction, value, and its shear on formation of sporadic E is developed in case of presence the effect of horizontally changing wind (the effect of horizontal convergence). In this case, the horizontal wind with horizontal shear, characterized by compressibility and/or vortices, can provide an additional influence on heavy metallic ions Fe+ horizontal convergence and Es layers density, which can be formed by their vertical convergence caused as by wind direction and values and by its horizontal shear as well. The horizontal wind value and direction have significant influence on ion vertical drift velocity and its minimal negative values of divergence necessary for development of ion vertical convergence into sporadic E type layer. The horizontal wind horizontal shear, in addition to its vertical shear, also influences the ion drift velocity value and its vertical changes and correspondingly on formation of sporadic E layer and its density. The atmospheric gravity waves (AGWs), with relatively smaller horizontal wave length than planetary waves and tidal motion, can significantly influence location of ion vertical drift velocity nodes (where Es layers formation expectable) and its vertical and horizontal shear providing ion vertical convergence into thin layer. Horizontal shear can cause additional influence in the Es layers density than in the case of only wind value and vertical shear only. In this case, depending on wind direction and value in the height region of the lower thermosphere about 90-150 km occurs heavy metallic ions (Fe+) vertical convergence into thin sporadic E type layer. The horizontal wind horizontal shear also can influence on ions horizontal convergence and density and location Es layers. The AGWs modulate the horizontal wind direction and values and causes ion additional horizontal convergence, while the vertical changes (shear) causes additional vertical convergence than in the case without vertical shear. Influence of horizontal shear on sporadic E density and the importance of vertical compressibility of the lower thermosphere, which also can be influenced by AGWs, is demonstrated numerically. For the given wavelength and background wind, the predictability of formation Es layers and its possible location regions are shown. Acknowledgements: This study was funded by Georgian Shota Rustaveli National Science Foundation Grant no. FR17-357. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=in-homogeneous" title="in-homogeneous">in-homogeneous</a>, <a href="https://publications.waset.org/abstracts/search?q=sporadic%20E" title=" sporadic E"> sporadic E</a>, <a href="https://publications.waset.org/abstracts/search?q=thermosphere" title=" thermosphere"> thermosphere</a>, <a href="https://publications.waset.org/abstracts/search?q=wind" title=" wind"> wind</a> </p> <a href="https://publications.waset.org/abstracts/128943/analytical-and-numerical-study-of-formation-of-sporadic-e-layer-with-taking-into-account-horizontal-and-vertical-in-homogeneity-of-the-horizontal-wind" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/128943.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">164</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">5831</span> Effectiveness of Powerpoint Presentations in Teaching Anatomy: A Student's Perspective</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vrinda%20Hari%20Ankolekar">Vrinda Hari Ankolekar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The advancement of various audio-visual aids in the present era has led to progressive changes in education. Use of powerpoint presentations play a key role in anatomy to learn and understand a particular topic. As the subject of anatomy involves more of illustrations and demonstrations, powerpoint presentations become essential in conveying the necessary information. Objectives: To assess the students’ perspective about the use of powerpoint presentations in teaching anatomy.Method: A questionnaire was constructed and 55 students were asked to put forth their preferences for the powerpoint presentations or blackboard that would help them to understand the subject better. Results and conclusion: 30 voted PPT as better and effective tool to explain the subject efficiently. 35 chose PPT as more creative than Blackboard to create interest in the subject. 20 wanted to retain chalk and talk for teaching their subject instead of replacing it with PowerPoint. 36 felt chalk and talk as more useful and appropriate tool for teaching than PowerPoint. Only 25 felt chalk and talk relatively more boring than PowerPoint. 23 experienced more involvement and active participation in the class when chalk and talk is used as the teaching tool. 26 stated that chalk and talk has most of the features needed for teaching.One of the limitations of this study is that the sample size is drawn from one institution only and deals with the experience of one particular group of individuals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chalk%20and%20board" title="chalk and board">chalk and board</a>, <a href="https://publications.waset.org/abstracts/search?q=powerpoint%20presentation" title=" powerpoint presentation"> powerpoint presentation</a>, <a href="https://publications.waset.org/abstracts/search?q=presentation%20skills" title=" presentation skills"> presentation skills</a>, <a href="https://publications.waset.org/abstracts/search?q=teaching%20technologies" title=" teaching technologies"> teaching technologies</a> </p> <a href="https://publications.waset.org/abstracts/35050/effectiveness-of-powerpoint-presentations-in-teaching-anatomy-a-students-perspective" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35050.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">413</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">5830</span> The Simultaneous Effect of Horizontal and Vertical Earthquake Components on the Seismic Response of Buckling-Restrained Braced Frame</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20Shokrollahi">Mahdi Shokrollahi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Over the past years, much research has been conducted on the vulnerability of structures to earthquakes, which only horizontal components of the earthquake were considered in their seismic analysis and vertical earthquake acceleration especially in near-fault area was less considered. The investigation of the mappings shows that vertical earthquake acceleration can be significantly closer to the maximum horizontal earthquake acceleration, and even exceeds it in some cases. This study has compared the behavior of different members of three steel moment frame with a buckling-restrained brace (BRB), one time only by considering the horizontal component and again by considering simultaneously the horizontal and vertical components under the three mappings of the near-fault area and the effect of vertical acceleration on structural responses is investigated. Finally, according to the results, the vertical component of the earthquake has a greater effect on the axial force of the columns and the vertical displacement of the middle of the beams of the different classes and less on the lateral displacement of the classes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20earthquake%20acceleration" title="vertical earthquake acceleration">vertical earthquake acceleration</a>, <a href="https://publications.waset.org/abstracts/search?q=near-fault%20area" title=" near-fault area"> near-fault area</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20frame" title=" steel frame"> steel frame</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20and%20vertical%20component%20of%20earthquake" title=" horizontal and vertical component of earthquake"> horizontal and vertical component of earthquake</a>, <a href="https://publications.waset.org/abstracts/search?q=buckling-restrained%20brace" title=" buckling-restrained brace"> buckling-restrained brace</a> </p> <a href="https://publications.waset.org/abstracts/91326/the-simultaneous-effect-of-horizontal-and-vertical-earthquake-components-on-the-seismic-response-of-buckling-restrained-braced-frame" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91326.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">182</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">5829</span> Road Transition Design on Freeway Tunnel Entrance and Exit Based on Traffic Capacity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Han%20Bai">Han Bai</a>, <a href="https://publications.waset.org/abstracts/search?q=Tong%20Zhang"> Tong Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Lemei%20Yu"> Lemei Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Doudou%20Xie"> Doudou Xie</a>, <a href="https://publications.waset.org/abstracts/search?q=Liang%20Zhao"> Liang Zhao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Road transition design on freeway tunnel entrance and exit is one vital factor in realizing smooth transition and improving traveling safety for vehicles. The goal of this research is to develop a horizontal road transition design tool that considers the transition technology of traffic capacity consistency to explore its accommodation mechanism. The influencing factors of capacity are synthesized and a modified capacity calculation model focusing on the influence of road width and lateral clearance is developed based on the VISSIM simulation to calculate the width of road transition sections. To keep the traffic capacity consistency, the right side of the transition section of the tunnel entrance and exit is divided into three parts: front arc, an intermediate transition section, and end arc; an optimization design on each transition part is conducted to improve the capacity stability and horizontal alignment transition. A case study on the Panlong Tunnel in Ji-Qing freeway illustrates the application of the tool. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=traffic%20safety" title="traffic safety">traffic safety</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20transition" title=" road transition"> road transition</a>, <a href="https://publications.waset.org/abstracts/search?q=freeway%20tunnel" title=" freeway tunnel"> freeway tunnel</a>, <a href="https://publications.waset.org/abstracts/search?q=traffic%20capacity" title=" traffic capacity"> traffic capacity</a> </p> <a href="https://publications.waset.org/abstracts/88916/road-transition-design-on-freeway-tunnel-entrance-and-exit-based-on-traffic-capacity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88916.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">331</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">5828</span> Partner Selection for Horizontal Logistic Cooperation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mario%20Winkelhaus">Mario Winkelhaus</a>, <a href="https://publications.waset.org/abstracts/search?q=Franz%20Vall%C3%A9e"> Franz Vallée</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many companies see horizontal cooperation as a promising possibility to increase their efficiency in outbound logistics. The selection of suitable partners has particular importance in the formation of horizontal cooperation. Up until now, literature mainly focused on general applicable methods for the identification of cooperation partners without a closer examination of the specific area where the cooperation takes place. Thus, specific criteria as a basis for the partner selection in the field of logistics cooperation are missing. To close this scientific gap, an explorative research approach is used to answer the open question of the article. To collect the needed criteria, a qualitative experiment with 20 participants from 16 companies was done. Within this workshop, general criteria, as well as sector-specific requirements, have been identified which were integrated in a partner selection model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=horizontal%20cooperation" title="horizontal cooperation">horizontal cooperation</a>, <a href="https://publications.waset.org/abstracts/search?q=logistics%20cooperation%20partnering%20criteria" title=" logistics cooperation partnering criteria"> logistics cooperation partnering criteria</a>, <a href="https://publications.waset.org/abstracts/search?q=partner%20selection" title=" partner selection"> partner selection</a> </p> <a href="https://publications.waset.org/abstracts/15860/partner-selection-for-horizontal-logistic-cooperation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15860.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">5827</span> Application of Model Tree in the Prediction of TBM Rate of Penetration with Synthetic Minority Oversampling Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ehsan%20Mehryaar">Ehsan Mehryaar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The rate of penetration is (RoP) one of the vital factors in the cost and time of tunnel boring projects; therefore, predicting it can lead to a substantial increase in the efficiency of the project. RoP is heavily dependent geological properties of the project site and TBM properties. In this study, 151-point data from Queen’s water tunnel is collected, which includes unconfined compression strength, peak slope index, angle with weak planes, and distance between planes of weaknesses. Since the size of the data is small, it was observed that it is imbalanced. To solve that problem synthetic minority oversampling technique is utilized. The model based on the model tree is proposed, where each leaf consists of a support vector machine model. Proposed model performance is then compared to existing empirical equations in the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Model%20tree" title="Model tree">Model tree</a>, <a href="https://publications.waset.org/abstracts/search?q=SMOTE" title=" SMOTE"> SMOTE</a>, <a href="https://publications.waset.org/abstracts/search?q=rate%20of%20penetration" title=" rate of penetration"> rate of penetration</a>, <a href="https://publications.waset.org/abstracts/search?q=TBM%28tunnel%20boring%20machine%29" title=" TBM(tunnel boring machine)"> TBM(tunnel boring machine)</a>, <a href="https://publications.waset.org/abstracts/search?q=SVM" title=" SVM"> SVM</a> </p> <a href="https://publications.waset.org/abstracts/141473/application-of-model-tree-in-the-prediction-of-tbm-rate-of-penetration-with-synthetic-minority-oversampling-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141473.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">5826</span> Horizontal and Vertical Illuminance Correlations in a Case Study for Shaded South Facing Surfaces</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Matour">S. Matour</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mahdavinejad"> M. Mahdavinejad</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Fayaz"> R. Fayaz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Daylight utilization is a key factor in achieving visual and thermal comfort, and energy savings in integrated building design. However, lack of measured data related to this topic has become a major challenge with the increasing need for integrating lighting concepts and simulations in the early stages of design procedures. The current paper deals with the values of daylight illuminance on horizontal and south facing vertical surfaces; the data are estimated using IESNA model and measured values of the horizontal and vertical illuminance, and a regression model with an acceptable linear correlation is obtained. The resultant illuminance frequency curves are useful for estimating daylight availability on south facing surfaces in Tehran. In addition, the relationship between indirect vertical illuminance and the corresponding global horizontal illuminance is analyzed. A simple parametric equation is proposed in order to predict the vertical illumination on a shaded south facing surface. The equation correlates the ratio between the vertical and horizontal illuminance to the solar altitude and is used with another relationship for prediction of the vertical illuminance. Both equations show good agreement, which allows for calculation of indirect vertical illuminance on a south facing surface at any time throughout the year. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tehran%20daylight%20availability" title="Tehran daylight availability">Tehran daylight availability</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20illuminance" title=" horizontal illuminance"> horizontal illuminance</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20illuminance" title=" vertical illuminance"> vertical illuminance</a>, <a href="https://publications.waset.org/abstracts/search?q=diffuse%20illuminance" title=" diffuse illuminance"> diffuse illuminance</a> </p> <a href="https://publications.waset.org/abstracts/73872/horizontal-and-vertical-illuminance-correlations-in-a-case-study-for-shaded-south-facing-surfaces" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73872.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">210</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">5825</span> Bending Moment of Flexible Batter Pile in Sands under Horizontal Loads</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fabian%20J.%20Manoppo">Fabian J. Manoppo</a>, <a href="https://publications.waset.org/abstracts/search?q=Dody%20M.%20J.%20Sumayouw"> Dody M. J. Sumayouw</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The bending moment of a single free head model flexible batter piles in sand under horizontal loads is investigated. The theoretical estimate of the magnitude maximum bending moment for the piles was considering a vertical rigid pile under an inclined load and using semi-empirical relations. The length of the equivalent rigid pile was based on the relative stiffness factor of the pile. Model tests were carried out using instrumented piles of wide-ranging flexibilities. The piles were buried in loose sand at batter angles of β=±150, β=±300 and were applied to incrementally increasing lateral loads. The pile capacities and the variation of bending moment along the pile shaft were measured. The new coefficient of 0.5 was proposed to estimate the bending moment of a flexible batter pile in the sand under horizontal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=batter%20pile" title="batter pile">batter pile</a>, <a href="https://publications.waset.org/abstracts/search?q=bending%20moment" title=" bending moment"> bending moment</a>, <a href="https://publications.waset.org/abstracts/search?q=sand" title=" sand"> sand</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20loads" title=" horizontal loads"> horizontal loads</a> </p> <a href="https://publications.waset.org/abstracts/190372/bending-moment-of-flexible-batter-pile-in-sands-under-horizontal-loads" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190372.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">32</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">5824</span> Pressure Gradient Prediction of Oil-Water Two Phase Flow through Horizontal Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20I.%20Raheem">Ahmed I. Raheem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this thesis, stratified and stratified wavy flow regimes have been investigated numerically for the oil (1.57 mPa s viscosity and 780 kg/m3 density) and water twophase flow in small and large horizontal steel pipes with a diameter between 0.0254 to 0.508 m by ANSYS Fluent software. Volume of fluid (VOF) with two phases flows using two equations family models (Realizable k- <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CFD" title="CFD">CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=two-phase%20flow" title=" two-phase flow"> two-phase flow</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure%20gradient" title=" pressure gradient"> pressure gradient</a>, <a href="https://publications.waset.org/abstracts/search?q=volume%20of%20fluid" title=" volume of fluid"> volume of fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20diameter" title=" large diameter"> large diameter</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20pipe" title=" horizontal pipe"> horizontal pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=oil-water%20stratified%20and%20stratified%20wavy%20flow" title=" oil-water stratified and stratified wavy flow "> oil-water stratified and stratified wavy flow </a> </p> <a href="https://publications.waset.org/abstracts/14937/pressure-gradient-prediction-of-oil-water-two-phase-flow-through-horizontal-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14937.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">438</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">5823</span> BIM Application and Construction Schedule Simulation for the Horizontal Work Area</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hyeon-Seong%20Kim">Hyeon-Seong Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang-Mi%20Park"> Sang-Mi Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Seul-Gi%20Kim"> Seul-Gi Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seon-Ju%20Han"> Seon-Ju Han</a>, <a href="https://publications.waset.org/abstracts/search?q=Leen-Seok%20Kang"> Leen-Seok Kang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of BIM, including 4D CAD system, in a construction project is gradually increasing. Since the building construction works repeatedly in the vertical space, it is relatively easy to confirm the interference effect when applying the BIM, but the interference effect for the civil engineering project is relatively small because the civil works perform non-repetitive processes in the horizontal space. For this reason, it is desirable to apply BIM to the construction phase when applying BIM to the civil engineering project, and the most active BIM tool applied to the construction phase is the 4D CAD function for the schedule management. This paper proposes the application procedure of BIM by the construction phase of civil engineering project and a linear 4D CAD construction methodology suitable for the civil engineering project in which linear work is performed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=BIM" title="BIM">BIM</a>, <a href="https://publications.waset.org/abstracts/search?q=4D%20CAD" title=" 4D CAD"> 4D CAD</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%204D%20simulation" title=" linear 4D simulation"> linear 4D simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=VR" title=" VR"> VR</a> </p> <a href="https://publications.waset.org/abstracts/83745/bim-application-and-construction-schedule-simulation-for-the-horizontal-work-area" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83745.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">404</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">5822</span> Permissible Horizontal Displacements during the Construction of Vertical Shafts in Soft Soils at the Valley of Mexico: Case History</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joel%20M.%20De%20La%20Rosa%20R.">Joel M. De La Rosa R.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the results obtained when monitoring the horizontal deformations of the soil mass are detailed, during each of the construction stages of several vertical shafts located in the soft soils of the Valley of Mexico, by means of the flotation method. From the analysis of these results, the magnitude and percentage relationship with respect to the diameter and depth of excavation of the horizontal deformations that occurred during the monitoring period is established. Based on the horizontal deformation monitoring system and the information provided by the supervisor's site log, the construction stages that have the greatest impact on deformations are established. Additionally, an analysis of the deformations is carried out, which takes into account the resistance and deformability characteristics of the excavated soils, as well as the prevailing hydraulic conditions. This work will allow construction engineers and institutions in charge of infrastructure works in the Valley of Mexico to establish permissible ranges for horizontal deformations that can occur in very soft and saturated soils, during the different construction stages; improving response protocols to potentially dangerous behaviors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20shaft" title="vertical shaft">vertical shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=flotation%20method" title=" flotation method"> flotation method</a>, <a href="https://publications.waset.org/abstracts/search?q=very%20soft%20clays" title=" very soft clays"> very soft clays</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20supervision" title=" construction supervision"> construction supervision</a> </p> <a href="https://publications.waset.org/abstracts/137807/permissible-horizontal-displacements-during-the-construction-of-vertical-shafts-in-soft-soils-at-the-valley-of-mexico-case-history" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/137807.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">195</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">5821</span> Numerical Analysis of Prefabricated Horizontal Drain Induced Consolidation Using ABAQUS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anjana%20R.%20Menon">Anjana R. Menon</a>, <a href="https://publications.waset.org/abstracts/search?q=Anjana%20Bhasi"> Anjana Bhasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the numerical analysis of Prefabricated Horizontal Drain (PHD) induced consolidation of clayey deposits, using ABAQUS. PHDs are much like Prefabricated Vertical Drains (PVDs) installed in horizontal layers, used mainly for enhancing the consolidation of clayey fill embankments, and dredged mud deposits. The efficiency of the system depends mainly on the spacing and layout of the drain. Hence, two spacing related parameters are defined, namely WH (width to horizontal spacing ratio) and VH (vertical to horizontal spacing ratio), and the finite element models are developed based on plane strain unit cell conditions under various combinations of these parameters. The analysis results, in terms of degree of consolidation (U), are compared with the established theories. Based on the analysis, a set of equations are proposed to analyse the PHD induced consolidation. The proposed method is found to be reasonably accurate. Further, the effect of PHDs at different spacing ratios, in accelerating consolidation of a clayey embankment fill is analysed in terms of pore pressure dissipation rate, and settlement. The PHD is found to accelerate the rate of pore pressure dissipation by more than 50%, thus reducing the time for final settlement significantly. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ABAQUS" title="ABAQUS">ABAQUS</a>, <a href="https://publications.waset.org/abstracts/search?q=consolidation" title=" consolidation"> consolidation</a>, <a href="https://publications.waset.org/abstracts/search?q=plane%20strain" title=" plane strain"> plane strain</a>, <a href="https://publications.waset.org/abstracts/search?q=prefabricated%20horizontal%20drain" title=" prefabricated horizontal drain"> prefabricated horizontal drain</a> </p> <a href="https://publications.waset.org/abstracts/67741/numerical-analysis-of-prefabricated-horizontal-drain-induced-consolidation-using-abaqus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67741.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">366</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=horizontal%20boring%20tool&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=horizontal%20boring%20tool&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=horizontal%20boring%20tool&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=horizontal%20boring%20tool&page=5">5</a></li> <li class="page-item"><a class="page-link" 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