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hole</title> <meta name="description" content="Search results for: black hole"> <meta name="keywords" content="black hole"> <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 ml-auto" 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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="black hole"> <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> 1194</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: black hole</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1194</span> Spin One Hawking Radiation from Dirty Black Holes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Petarpa%20Boonserm">Petarpa Boonserm</a>, <a href="https://publications.waset.org/abstracts/search?q=Tritos%20Ngampitipan"> Tritos Ngampitipan</a>, <a href="https://publications.waset.org/abstracts/search?q=Matt%20Visser"> Matt Visser</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A 'clean' black hole is a black hole in vacuum such as the Schwarzschild black hole. However in real physical systems, there are matter fields around a black hole. Such a black hole is called a 'dirty black hole'. In this paper, The effect of matter fields on the black hole and the greybody factor is investigated. The results show that matter fields make a black hole smaller. They can increase the potential energy to a black hole to obstruct Hawking radiation to propagate. This causes the greybody factor of a dirty black hole to be less than that of a clean black hole. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dirty%20black%20hole" title="dirty black hole">dirty black hole</a>, <a href="https://publications.waset.org/abstracts/search?q=greybody%20factor" title=" greybody factor"> greybody factor</a>, <a href="https://publications.waset.org/abstracts/search?q=hawking%20radiation" title=" hawking radiation"> hawking radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=matter%20fields." title=" matter fields."> matter fields.</a> </p> <a href="https://publications.waset.org/abstracts/1553/spin-one-hawking-radiation-from-dirty-black-holes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1553.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">598</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">1193</span> Foliation and the First Law of Thermodynamics for the Kerr Newman Black Hole</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20M.%20Jawwad%20Riaz">Syed M. Jawwad Riaz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There has been a lot of interest in exploring the thermodynamic properties at the horizon of a black hole geometry. Earlier, it has been shown, for different spacetimes, that the Einstein field equations at the horizon can be expressed as a first law of black hole thermodynamics. In this paper, considering r = constant slices, for the Kerr-Newman black hole, shown that the Einstein field equations for the induced 3-metric of the hypersurface is expressed in thermodynamic quantities under the virtual displacements of the hypersurfaces. As expected, it is found that the field equations of the induced metric corresponding to the horizon can only be written as a first law of black hole thermodynamics. It is to be mentioned here that the procedure adopted is much easier, to obtain such results, as here one has to essentially deal with (n - 1)-dimensional induced metric for an n-dimensional spacetime. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20hole%20space-times" title="black hole space-times">black hole space-times</a>, <a href="https://publications.waset.org/abstracts/search?q=Einstein%27s%20field%20equation" title=" Einstein's field equation"> Einstein's field equation</a>, <a href="https://publications.waset.org/abstracts/search?q=foliation" title=" foliation"> foliation</a>, <a href="https://publications.waset.org/abstracts/search?q=hyper-surfaces" title=" hyper-surfaces"> hyper-surfaces</a> </p> <a href="https://publications.waset.org/abstracts/50127/foliation-and-the-first-law-of-thermodynamics-for-the-kerr-newman-black-hole" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50127.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">346</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">1192</span> Quantum Mechanics as a Branch of Black Hole Cosmology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=U.%20V.%20S.%20Seshavatharam">U. V. S. Seshavatharam</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Lakshminarayana"> S. Lakshminarayana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In a unified approach observed cosmic red shift can be re-interpreted as an index of cosmological galactic atomic light emission phenomenon. By increasing the applications of Hubble volume in cosmology as well as in quantum physics, concepts of ‘Black Hole Cosmology’ can be well-confirmed. Clearly speaking ‘quantum mechanics’ can be shown to be a branch of ‘black hole cosmology’. In Big Bang Model, confirmation of all the observations directly depend on the large scale galactic distances that are beyond human reach and raise ambiguity in all respects. The subject of modern black hole physics is absolutely theoretical. Advantage of Black hole cosmology lies in confirming its validity through the ground based atomic and nuclear experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hubble%20volume" title="Hubble volume">Hubble volume</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20hole%20cosmology" title=" black hole cosmology"> black hole cosmology</a>, <a href="https://publications.waset.org/abstracts/search?q=CMBR%20energy%20density" title=" CMBR energy density"> CMBR energy density</a>, <a href="https://publications.waset.org/abstracts/search?q=Planck%E2%80%99s%20constant" title=" Planck’s constant"> Planck’s constant</a>, <a href="https://publications.waset.org/abstracts/search?q=fine%20structure%20ratio" title=" fine structure ratio"> fine structure ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=cosmic%20time" title=" cosmic time"> cosmic time</a>, <a href="https://publications.waset.org/abstracts/search?q=nuclear%20charge%20radius" title=" nuclear charge radius"> nuclear charge radius</a>, <a href="https://publications.waset.org/abstracts/search?q=unification" title=" unification"> unification</a> </p> <a href="https://publications.waset.org/abstracts/8062/quantum-mechanics-as-a-branch-of-black-hole-cosmology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8062.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">565</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">1191</span> Detecting Black Hole Attacks in Body Sensor Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sara%20Alshehri">Sara Alshehri</a>, <a href="https://publications.waset.org/abstracts/search?q=Bayan%20Alenzi"> Bayan Alenzi</a>, <a href="https://publications.waset.org/abstracts/search?q=Atheer%20Alshehri"> Atheer Alshehri</a>, <a href="https://publications.waset.org/abstracts/search?q=Samia%20Chelloug"> Samia Chelloug</a>, <a href="https://publications.waset.org/abstracts/search?q=Zainab%20Almry"> Zainab Almry</a>, <a href="https://publications.waset.org/abstracts/search?q=Hussah%20Albugmai"> Hussah Albugmai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper concerns body area networks sensor that collect signals around a human body. The black hole attacks are the main security challenging problem because the data traffic can be dropped at any node. The focus of our proposed solution is to efficiently route data packets while detecting black hole nodes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=body%20sensor%20networks" title="body sensor networks">body sensor networks</a>, <a href="https://publications.waset.org/abstracts/search?q=security" title=" security"> security</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20hole" title=" black hole"> black hole</a>, <a href="https://publications.waset.org/abstracts/search?q=routing" title=" routing"> routing</a>, <a href="https://publications.waset.org/abstracts/search?q=broadcasting" title=" broadcasting"> broadcasting</a>, <a href="https://publications.waset.org/abstracts/search?q=OMNeT%2B%2B" title=" OMNeT++ "> OMNeT++ </a> </p> <a href="https://publications.waset.org/abstracts/10435/detecting-black-hole-attacks-in-body-sensor-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10435.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">645</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">1190</span> A Secure Survey against Black Hole Attack in MANET</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Usha">G. Usha</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Kannimuthu"> S. Kannimuthu</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Mahalakshmi"> K. Mahalakshmi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mobile Adhoc Network (MANET) is one of the most promising technologies that have applications ranging from various portable devices to military networks. MANET has no fixed infrastructure and the security of such network is a big concern. Therefore, in order to operate MANET’s securely, the misbehavior and intrusions should be detected before the attackers affect the network communication. In this article, we make a comprehensive survey against black hole attack that is a serious threat against MANET that exploits the routing behavior of the MANET. We have given broad survey solutions that detect black hole attacks in MANET. This is achieved by analyzing the techniques involved in detecting the attacks in each scheme. Furthermore, we examine about the challenges to the researchers for constructing an in-depth solution against black hole attack. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AODV" title="AODV">AODV</a>, <a href="https://publications.waset.org/abstracts/search?q=cross%20layer%20security" title=" cross layer security"> cross layer security</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20Adhoc%20network%20%28MANET%29" title=" mobile Adhoc network (MANET)"> mobile Adhoc network (MANET)</a>, <a href="https://publications.waset.org/abstracts/search?q=packet%20delivery%20ratio" title=" packet delivery ratio"> packet delivery ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20layer%20security" title=" single layer security"> single layer security</a> </p> <a href="https://publications.waset.org/abstracts/46885/a-secure-survey-against-black-hole-attack-in-manet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46885.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">406</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">1189</span> Generalized Up-downlink Transmission using Black-White Hole Entanglement Generated by Two-level System Circuit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Arif%20Jalil">Muhammad Arif Jalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Xaythavay%20Luangvilay"> Xaythavay Luangvilay</a>, <a href="https://publications.waset.org/abstracts/search?q=Montree%20Bunruangses"> Montree Bunruangses</a>, <a href="https://publications.waset.org/abstracts/search?q=Somchat%20Sonasang"> Somchat Sonasang</a>, <a href="https://publications.waset.org/abstracts/search?q=Preecha%20Yupapin"> Preecha Yupapin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Black and white holes form the entangled pair⟨BH│WH⟩, where a white hole occurs when the particle moves at the same speed as light. The entangled black-white hole pair is at the center with the radian between the gap. When the speed of particle motion is slower than light, the black hole is gravitational (positive gravity), where the white hole is smaller than the black hole. On the downstream side, the entangled pair appears to have a black hole outside the gap increases until the white holes disappear, which is the emptiness paradox. On the upstream side, when moving faster than light, white holes form times tunnels, with black holes becoming smaller. It will continue to move faster and further when the black hole disappears and becomes a wormhole (Singularity) that is only a white hole in emptiness (Emptiness). This research studies use of black and white holes generated by a two-level circuit for communication transmission carriers, in which high ability and capacity of data transmission can be obtained. The black and white hole pair can be generated by the two-level system circuit when the speech of a particle on the circuit is equal to the speed of light. The black hole forms when the particle speed has increased from slower to equal to the light speed, while the white hole is established when the particle comes down faster than light. They are bound by the entangled pair, signal and idler, ⟨Signal│Idler⟩, and the virtual ones for the white hole, which has an angular displacement of half of π radian. A two-level system is made from an electronic circuit to create black and white holes bound by the entangled bits that are immune or cloning-free from thieves. Start by creating a wave-particle behavior when its speed is equal to light black hole is in the middle of the entangled pair, which is the two bit gate. The required information can be input into the system and wrapped by the black hole carrier. A timeline (Tunnel) occurs when the wave-particle speed is faster than light, from which the entangle pair is collapsed. The transmitted information is safely in the time tunnel. The required time and space can be modulated via the input for the downlink operation. The downlink is established when the particle speed is given by a frequency(energy) form is down and entered into the entangled gap, where this time the white hole is established. The information with the required destination is wrapped by the white hole and retrieved by the clients at the destination. The black and white holes are disappeared, and the information can be recovered and used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cloning%20free" title="cloning free">cloning free</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20machine" title=" time machine"> time machine</a>, <a href="https://publications.waset.org/abstracts/search?q=teleportation" title=" teleportation"> teleportation</a>, <a href="https://publications.waset.org/abstracts/search?q=two-level%20system" title=" two-level system"> two-level system</a> </p> <a href="https://publications.waset.org/abstracts/176235/generalized-up-downlink-transmission-using-black-white-hole-entanglement-generated-by-two-level-system-circuit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176235.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">74</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">1188</span> Particle and Photon Trajectories near the Black Hole Immersed in the Nonstatic Cosmological Background</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elena%20M.%20Kopteva">Elena M. Kopteva</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavlina%20Jaluvkova"> Pavlina Jaluvkova</a>, <a href="https://publications.waset.org/abstracts/search?q=Zdenek%20Stuchlik"> Zdenek Stuchlik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The question of constructing a consistent model of the cosmological black hole remains to be unsolved and still attracts the interest of cosmologists as far as it is important in a wide set of research problems including the problem of the black hole horizon dynamics, the problem of interplay between cosmological expansion and local gravity, the problem of structure formation in the early universe etc. In this work, the model of the cosmological black hole is built on the basis of the exact solution of the Einstein equations for the spherically symmetric inhomogeneous dust distribution in the approach of the mass function use. Possible trajectories for massive particles and photons near the black hole immersed in the nonstatic dust cosmological background are investigated in frame of the obtained model. The reference system of distant galaxy comoving to cosmological expansion combined with curvature coordinates is used, so that the resulting metric becomes nondiagonal and involves both proper ‘cosmological’ time and curvature spatial coordinates. For this metric the geodesic equations are analyzed for the test particles and photons, and the respective trajectories are built. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=exact%20solutions%20for%20Einstein%20equations" title="exact solutions for Einstein equations">exact solutions for Einstein equations</a>, <a href="https://publications.waset.org/abstracts/search?q=Lemaitre-Tolman-Bondi%20solution" title=" Lemaitre-Tolman-Bondi solution"> Lemaitre-Tolman-Bondi solution</a>, <a href="https://publications.waset.org/abstracts/search?q=cosmological%20black%20holes" title=" cosmological black holes"> cosmological black holes</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20and%20photon%20trajectories" title=" particle and photon trajectories"> particle and photon trajectories</a> </p> <a href="https://publications.waset.org/abstracts/63353/particle-and-photon-trajectories-near-the-black-hole-immersed-in-the-nonstatic-cosmological-background" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63353.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">339</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">1187</span> Black-Hole Dimension: A Distinct Methodology of Understanding Time, Space and Data in Architecture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alp%20Arda">Alp Arda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Inspired by Nolan's ‘Interstellar’, this paper delves into speculative architecture, asking, ‘What if an architect could traverse time to study a city?’ It unveils the ‘Black-Hole Dimension,’ a groundbreaking concept that redefines urban identities beyond traditional boundaries. Moving past linear time narratives, this approach draws from the gravitational dynamics of black holes to enrich our understanding of urban and architectural progress. By envisioning cities and structures as influenced by black hole-like forces, it enables an in-depth examination of their evolution through time and space. The Black-Hole Dimension promotes a temporal exploration of architecture, treating spaces as narratives of their current state interwoven with historical layers. It advocates for viewing architectural development as a continuous, interconnected journey molded by cultural, economic, and technological shifts. This approach not only deepens our understanding of urban evolution but also empowers architects and urban planners to create designs that are both adaptable and resilient. Echoing themes from popular culture and science fiction, this methodology integrates the captivating dynamics of time and space into architectural analysis, challenging established design conventions. The Black-Hole Dimension champions a philosophy that welcomes unpredictability and complexity, thereby fostering innovation in design. In essence, the Black-Hole Dimension revolutionizes architectural thought by emphasizing space-time as a fundamental dimension. It reimagines our built environments as vibrant, evolving entities shaped by the relentless forces of time, space, and data. This groundbreaking approach heralds a future in architecture where the complexity of reality is acknowledged and embraced, leading to the creation of spaces that are both responsive to their temporal context and resilient against the unfolding tapestry of time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black-hole" title="black-hole">black-hole</a>, <a href="https://publications.waset.org/abstracts/search?q=timeline" title=" timeline"> timeline</a>, <a href="https://publications.waset.org/abstracts/search?q=urbanism" title=" urbanism"> urbanism</a>, <a href="https://publications.waset.org/abstracts/search?q=space%20and%20time" title=" space and time"> space and time</a>, <a href="https://publications.waset.org/abstracts/search?q=speculative%20architecture" title=" speculative architecture"> speculative architecture</a> </p> <a href="https://publications.waset.org/abstracts/184635/black-hole-dimension-a-distinct-methodology-of-understanding-time-space-and-data-in-architecture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/184635.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">73</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">1186</span> The Generalized Lemaitre-Tolman-Bondi Solutions in Modeling the Cosmological Black Holes </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elena%20M.%20Kopteva">Elena M. Kopteva</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavlina%20Jaluvkova"> Pavlina Jaluvkova</a>, <a href="https://publications.waset.org/abstracts/search?q=Zdenek%20Stuchlik"> Zdenek Stuchlik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In spite of the numerous attempts to close the discussion about the influence of cosmological expansion on local gravitationally bounded systems, this question arises in literature again and again and remains still far from its final resolution. Here one of the main problems is the problem of obtaining a physically adequate model of strongly gravitating object immersed in non-static cosmological background. Such objects are usually called ‘cosmological’ black holes and are of great interest in wide set of cosmological and astrophysical areas. In this work the set of new exact solutions of the Einstein equations is derived for the flat space that generalizes the known Lemaitre-Tolman-Bondi solution for the case of nonzero pressure. The solutions obtained are pretending to describe the black hole immersed in nonstatic cosmological background and give a possibility to investigate the hot problems concerning the effects of the cosmological expansion in gravitationally bounded systems, the structure formation in the early universe, black hole thermodynamics and other related problems. It is shown that each of the solutions obtained contains either the Reissner-Nordstrom or the Schwarzschild black hole in the central region of the space. It is demonstrated that the approach of the mass function use in solving of the Einstein equations allows clear physical interpretation of the resulting solutions, that is of much benefit to any their concrete application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=exact%20solutions%20of%20the%20Einstein%20equations" title="exact solutions of the Einstein equations">exact solutions of the Einstein equations</a>, <a href="https://publications.waset.org/abstracts/search?q=cosmological%20black%20holes" title=" cosmological black holes"> cosmological black holes</a>, <a href="https://publications.waset.org/abstracts/search?q=generalized%20Lemaitre-Tolman-Bondi%20solutions" title=" generalized Lemaitre-Tolman-Bondi solutions"> generalized Lemaitre-Tolman-Bondi solutions</a>, <a href="https://publications.waset.org/abstracts/search?q=nonzero%20pressure" title=" nonzero pressure"> nonzero pressure</a> </p> <a href="https://publications.waset.org/abstracts/63654/the-generalized-lemaitre-tolman-bondi-solutions-in-modeling-the-cosmological-black-holes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63654.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">423</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">1185</span> Physics of Black Holes. A Closed Cycle of Transformation of Matter in the Universe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Igor%20V.%20Kuzminov">Igor V. Kuzminov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The proposed article is a development of the topics of gravity, the inverse temperature dependence of gravity, the action of the inverse temperature dependence of gravity, and the second law of thermodynamics, dark matter, the identity of gravity, inertial forces, and centrifugal forces. All interaction schemes are built on the basis of Newton's laws of classical mechanics and Rutherford's planetary model of the structure of the atom. The basis of all constructions is the gyroscopic effect of rotation of all particles of the atomic structure. In this case, interatomic and intermolecular bonds are accepted as the static part of the gyroscope, and the rotation of an electron in an atom is accepted as the dynamic part. The structure of the planet Earth is accepted as a model of the structure of the Black Hole. Namely, gravitational and thermodynamic phenomena in the structure of the planet Earth are accepted as a model. Based on this model, assumptions are made about the processes inside the Black Hole. Moreover, a version is put forward, a scheme of a closed cycle of transformation of matter in the Universe. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20hole" title="black hole">black hole</a>, <a href="https://publications.waset.org/abstracts/search?q=gravity" title=" gravity"> gravity</a>, <a href="https://publications.waset.org/abstracts/search?q=inverse%20temperature%20dependence%20of%20gravitational%20forces" title=" inverse temperature dependence of gravitational forces"> inverse temperature dependence of gravitational forces</a>, <a href="https://publications.waset.org/abstracts/search?q=second%20law%20of%20thermodynamics" title=" second law of thermodynamics"> second law of thermodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=gyroscopic%20effect" title=" gyroscopic effect"> gyroscopic effect</a>, <a href="https://publications.waset.org/abstracts/search?q=dark%20matter" title=" dark matter"> dark matter</a> </p> <a href="https://publications.waset.org/abstracts/192968/physics-of-black-holes-a-closed-cycle-of-transformation-of-matter-in-the-universe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192968.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">25</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">1184</span> Thermodynamics of Stable Micro Black Holes Production by Modeling from the LHC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aref%20Yazdani">Aref Yazdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Tofighi"> Ali Tofighi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We study a simulative model for production of stable micro black holes based on investigation on thermodynamics of LHC experiment. We show that how this production can be achieved through a thermodynamic process of stability. Indeed, this process can be done through a very small amount of powerful fuel. By applying the second law of black hole thermodynamics at the scale of quantum gravity and perturbation expansion of the given entropy function, a time-dependent potential function is obtained which is illustrated with exact numerical values in higher dimensions. Seeking for the conditions for stability of micro black holes is another purpose of this study. This is proven through an injection method of putting the exact amount of energy into the final phase of the production which is equivalent to the same energy injection into the center of collision at the LHC in order to stabilize the produced particles. Injection of energy into the center of collision at the LHC is a new pattern that it is worth a try for the first time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=micro%20black%20holes" title="micro black holes">micro black holes</a>, <a href="https://publications.waset.org/abstracts/search?q=LHC%20experiment" title=" LHC experiment"> LHC experiment</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20holes%20thermodynamics" title=" black holes thermodynamics"> black holes thermodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=extra%20dimensions%20model" title=" extra dimensions model"> extra dimensions model</a> </p> <a href="https://publications.waset.org/abstracts/128968/thermodynamics-of-stable-micro-black-holes-production-by-modeling-from-the-lhc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/128968.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">144</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">1183</span> Realizing Teleportation Using Black-White Hole Capsule Constructed by Space-Time Microstrip Circuit Control</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mapatsakon%20Sarapat">Mapatsakon Sarapat</a>, <a href="https://publications.waset.org/abstracts/search?q=Mongkol%20Ketwongsa"> Mongkol Ketwongsa</a>, <a href="https://publications.waset.org/abstracts/search?q=Somchat%20Sonasang"> Somchat Sonasang</a>, <a href="https://publications.waset.org/abstracts/search?q=Preecha%20Yupapin"> Preecha Yupapin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The designed and performed preliminary tests on a space-time control circuit using a two-level system circuit with a 4-5 cm diameter microstrip for realistic teleportation have been demonstrated. It begins by calculating the parameters that allow a circuit that uses the alternative current (AC) at a specified frequency as the input signal. A method that causes electrons to move along the circuit perimeter starting at the speed of light, which found satisfaction based on the wave-particle duality. It is able to establish the supersonic speed (faster than light) for the electron cloud in the middle of the circuit, creating a timeline and propulsive force as well. The timeline is formed by the stretching and shrinking time cancellation in the relativistic regime, in which the absolute time has vanished. In fact, both black holes and white holes are created from time signals at the beginning, where the speed of electrons travels close to the speed of light. They entangle together like a capsule until they reach the point where they collapse and cancel each other out, which is controlled by the frequency of the circuit. Therefore, we can apply this method to large-scale circuits such as potassium, from which the same method can be applied to form the system to teleport living things. In fact, the black hole is a hibernation system environment that allows living things to live and travel to the destination of teleportation, which can be controlled from position and time relative to the speed of light. When the capsule reaches its destination, it increases the frequency of the black holes and white holes canceling each other out to a balanced environment. Therefore, life can safely teleport to the destination. Therefore, there must be the same system at the origin and destination, which could be a network. Moreover, it can also be applied to space travel as well. The design system will be tested on a small system using a microstrip circuit system that we can create in the laboratory on a limited budget that can be used in both wired and wireless systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quantum%20teleportation" title="quantum teleportation">quantum teleportation</a>, <a href="https://publications.waset.org/abstracts/search?q=black-white%20hole" title=" black-white hole"> black-white hole</a>, <a href="https://publications.waset.org/abstracts/search?q=time" title=" time"> time</a>, <a href="https://publications.waset.org/abstracts/search?q=timeline" title=" timeline"> timeline</a>, <a href="https://publications.waset.org/abstracts/search?q=relativistic%20electronics" title=" relativistic electronics"> relativistic electronics</a> </p> <a href="https://publications.waset.org/abstracts/175534/realizing-teleportation-using-black-white-hole-capsule-constructed-by-space-time-microstrip-circuit-control" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/175534.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">75</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">1182</span> Modifying Hawking Radiation in 2D-Approximated Schwarzschild Black Holes near the Event Horizon</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Richard%20Pincak">Richard Pincak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Starting from a 4D spacetime model using a partially negative dimensional product manifold (PNDP-manifold), which emerges as a 2D spacetime, we developed an analysis of tidal forces and Hawking radiation near the event horizon of a Schwarzchild black hole. The modified 2D metric, incorporating the effects of the four-dimensional Weyl tensor, with the dilatonic field and the newly derived time relation \(2\alpha t = \ln \epsilon\), can enable a deeper understanding of quantum gravity. The analysis shows how the modified Hawking temperature and distribution of emitted particles are affected by additional fields, providing potential observables for future experiments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20holes" title="black holes">black holes</a>, <a href="https://publications.waset.org/abstracts/search?q=Hawking%20radiation" title=" Hawking radiation"> Hawking radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=Weyl%20tensor" title=" Weyl tensor"> Weyl tensor</a>, <a href="https://publications.waset.org/abstracts/search?q=information%20paradox" title=" information paradox"> information paradox</a> </p> <a href="https://publications.waset.org/abstracts/191161/modifying-hawking-radiation-in-2d-approximated-schwarzschild-black-holes-near-the-event-horizon" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191161.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">21</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">1181</span> On Energy Condition Violation for Shifting Negative Mass Black Holes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manuel%20Urue%C3%B1a%20Palomo">Manuel Urueña Palomo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we introduce the study of a new solution to gravitational singularities by violating the energy conditions of the Penrose Hawking singularity theorems. We consider that a shift to negative energies, and thus, to negative masses, takes place at the event horizon of a black hole, justified by the original, singular and exact Schwarzschild solution. These negative energies are supported by relativistic particle physics considering the negative energy solutions of the Dirac equation, which states that a time transformation shifts to a negative energy particle. In either general relativity or full Newtonian mechanics, these negative masses are predicted to be repulsive. It is demonstrated that the model fits actual observations, and could possibly clarify the size of observed and unexplained supermassive black holes, when considering the inflation that would take place inside the event horizon where massive particles interact antigravitationally. An approximated solution of the model proposed could be simulated in order to compare it with these observations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20holes" title="black holes">black holes</a>, <a href="https://publications.waset.org/abstracts/search?q=CPT%20symmetry" title=" CPT symmetry"> CPT symmetry</a>, <a href="https://publications.waset.org/abstracts/search?q=negative%20mass" title=" negative mass"> negative mass</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20transformation" title=" time transformation"> time transformation</a> </p> <a href="https://publications.waset.org/abstracts/122009/on-energy-condition-violation-for-shifting-negative-mass-black-holes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/122009.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">149</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">1180</span> Analysis of the Black Sea Gas Hydrates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sukru%20Merey">Sukru Merey</a>, <a href="https://publications.waset.org/abstracts/search?q=Caglar%20Sinayuc"> Caglar Sinayuc</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gas hydrate deposits which are found in deep ocean sediments and in permafrost regions are supposed to be a fossil fuel reserve for the future. The Black Sea is also considered rich in terms of gas hydrates. It abundantly contains gas hydrates as methane (CH<sub>4</sub>~80 to 99.9%) source. In this study, by using the literature, seismic and other data of the Black Sea such as salinity, porosity of the sediments, common gas type, temperature distribution and pressure gradient, the optimum gas production method for the Black Sea gas hydrates was selected as mainly depressurization method. Numerical simulations were run to analyze gas production from gas hydrate deposited in turbidites in the Black Sea by depressurization. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CH4%20hydrate" title="CH4 hydrate">CH4 hydrate</a>, <a href="https://publications.waset.org/abstracts/search?q=Black%20Sea%20hydrates" title=" Black Sea hydrates"> Black Sea hydrates</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20hydrate%20experiments" title=" gas hydrate experiments"> gas hydrate experiments</a>, <a href="https://publications.waset.org/abstracts/search?q=HydrateResSim" title=" HydrateResSim"> HydrateResSim</a> </p> <a href="https://publications.waset.org/abstracts/48996/analysis-of-the-black-sea-gas-hydrates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48996.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">623</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">1179</span> Enhanced Calibration Map for a Four-Hole Probe for Measuring High Flow Angles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jafar%20Mortadha">Jafar Mortadha</a>, <a href="https://publications.waset.org/abstracts/search?q=Imran%20Qureshi"> Imran Qureshi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research explains and compares the modern techniques used for measuring the flow angles of a flowing fluid with the traditional technique of using multi-hole pressure probes. In particular, the focus of the study is on four-hole probes, which offer great reliability and benefits in several applications where the use of modern measurement techniques is either inconvenient or impractical. Due to modern advancements in manufacturing, small multi-hole pressure probes can be made with high precision, which eliminates the need for calibrating every manufactured probe. This study aims to improve the range of calibration maps for a four-hole probe to allow high flow angles to be measured accurately. The research methodology comprises a literature review of the successful calibration definitions that have been implemented on five-hole probes. These definitions are then adapted and applied on a four-hole probe using a set of raw pressures data. A comparison of the different definitions will be carried out in Matlab and the results will be analyzed to determine the best calibration definition. Taking simplicity of implementation into account as well as the reliability of flow angles estimation, an adapted technique from a research paper written in 2002 offered the most promising outcome. Consequently, the method is seen as a good enhancement for four-hole probes and it can substitute for the existing calibration definitions that offer less accuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calibration%20definitions" title="calibration definitions">calibration definitions</a>, <a href="https://publications.waset.org/abstracts/search?q=calibration%20maps" title=" calibration maps"> calibration maps</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20measurement%20techniques" title=" flow measurement techniques"> flow measurement techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=four-hole%20probes" title=" four-hole probes"> four-hole probes</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-hole%20pressure%20probes" title=" multi-hole pressure probes"> multi-hole pressure probes</a> </p> <a href="https://publications.waset.org/abstracts/92402/enhanced-calibration-map-for-a-four-hole-probe-for-measuring-high-flow-angles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92402.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">295</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">1178</span> Non-Singular Gravitational Collapse of a Homogeneous Scalar Field in Deformed Phase Space</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amir%20Hadi%20Ziaie">Amir Hadi Ziaie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, we revisit the collapse process of a spherically symmetric homogeneous scalar field (in FRW background) minimally coupled to gravity, when the phase-space deformations are taken into account. Such a deformation is mathematically introduced as a particular type of noncommutativity between the canonical momenta of the scale factor and of the scalar field. In the absence of such deformation, the collapse culminates in a spacetime singularity. However, when the phase-space is deformed, we find that the singularity is removed by a non-singular bounce, beyond which the collapsing cloud re-expands to infinity. More precisely, for negative values of the deformation parameter, we identify the appearance of a negative pressure, which decelerates the collapse to finally avoid the singularity formation. While in the un-deformed case, the horizon curve monotonically decreases to finally cover the singularity, in the deformed case the horizon has a minimum value that this value depends on deformation parameter and initial configuration of the collapse. Such a setting predicts a threshold mass for black hole formation in stellar collapse and manifests the role of non-commutative geometry in physics and especially in stellar collapse and supernova explosion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gravitational%20collapse" title="gravitational collapse">gravitational collapse</a>, <a href="https://publications.waset.org/abstracts/search?q=non-commutative%20geometry" title=" non-commutative geometry"> non-commutative geometry</a>, <a href="https://publications.waset.org/abstracts/search?q=spacetime%20singularity" title=" spacetime singularity"> spacetime singularity</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20hole%20physics" title=" black hole physics"> black hole physics</a> </p> <a href="https://publications.waset.org/abstracts/52267/non-singular-gravitational-collapse-of-a-homogeneous-scalar-field-in-deformed-phase-space" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52267.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">343</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">1177</span> Reliable and Energy-Aware Data Forwarding under Sink-Hole Attack in Wireless Sensor Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ebrahim%20Alrashed">Ebrahim Alrashed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wireless sensor networks are vulnerable to attacks from adversaries attempting to disrupt their operations. Sink-hole attacks are a type of attack where an adversary node drops data forwarded through it and hence affecting the reliability and accuracy of the network. Since sensor nodes have limited battery power, it is essential that any solution to the sinkhole attack problem be very energy-aware. In this paper, we present a reliable and energy efficient scheme to forward data from source nodes to the base station while under sink-hole attack. The scheme also detects sink-hole attack nodes and avoid paths that includes them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy-aware%20routing" title="energy-aware routing">energy-aware routing</a>, <a href="https://publications.waset.org/abstracts/search?q=reliability" title=" reliability"> reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=sink-hole%20attack" title=" sink-hole attack"> sink-hole attack</a>, <a href="https://publications.waset.org/abstracts/search?q=WSN" title=" WSN"> WSN</a> </p> <a href="https://publications.waset.org/abstracts/71964/reliable-and-energy-aware-data-forwarding-under-sink-hole-attack-in-wireless-sensor-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71964.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">396</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">1176</span> A Study on the Influence of Pin-Hole Position Error of Carrier on Mesh Load and Planet Load Sharing of Planetary Gear</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kyung%20Min%20Kang">Kyung Min Kang</a>, <a href="https://publications.waset.org/abstracts/search?q=Peng%20Mou"> Peng Mou</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong%20Xiang"> Dong Xiang</a>, <a href="https://publications.waset.org/abstracts/search?q=Gang%20Shen"> Gang Shen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For planetary gear system, Planet pin-hole position accuracy is one of most influential factor to efficiency and reliability of planetary gear system. This study considers planet pin-hole position error as a main input error for model and build multi body dynamic simulation model of planetary gear including planet pin-hole position error using MSC. ADAMS. From this model, the mesh load results between meshing gears in each pin-hole position error cases are obtained and based on these results, planet load sharing factor which reflect equilibrium state of mesh load sharing between whole meshing gear pair is calculated. Analysis result indicates that the pin-hole position error of tangential direction cause profound influence to mesh load and load sharing factor between meshing gear pair. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=planetary%20gear" title="planetary gear">planetary gear</a>, <a href="https://publications.waset.org/abstracts/search?q=load%20sharing%20factor" title=" load sharing factor"> load sharing factor</a>, <a href="https://publications.waset.org/abstracts/search?q=multibody%20dynamics" title=" multibody dynamics"> multibody dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=pin-hole%20position%20error" title=" pin-hole position error"> pin-hole position error</a> </p> <a href="https://publications.waset.org/abstracts/21196/a-study-on-the-influence-of-pin-hole-position-error-of-carrier-on-mesh-load-and-planet-load-sharing-of-planetary-gear" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21196.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">578</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">1175</span> Antimicrobial Efficacy of 0.75% Metronidazole and 2% Chlorhexidine Gel Applied in Implant Screw Hole: A Clinical Trial</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Solati">Mostafa Solati</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Objectives: Considering the gap of information regarding the optimal antimicrobial efficacy of metronidazole for application in the implant screw hole, this study aimed to compare the antimicrobial efficacy of 0.75% metronidazole and 2% chlorhexidine (CHX) gel applied in the implant screw hole. Materials and Methods: This randomized controlled clinical trial evaluated 60 implants (20 patients, each requiring three implants) in three groups (n=20). In group 1, 0.75% metronidazole gel was applied to the implant screw hole. In group 2, 2% CHX gel was applied, and in group 3, no material was used. Microbial samples were collected from the screw holes after three months, and the microbial colonies were counted. Data were analyzed using ANOVA. Results: The number of bacteria in the control group was significantly higher than that in 0.75% metronidazole gel and 2% CHX groups (P<0.05). The CHX group caused the maximum reduction in colony count with no significant difference from the metronidazole group (P>0.05). Conclusion: The application of 0.75% metronidazole gel and 2% CHX can effectively decrease the colony count in the implant screw hole and can probably play a role in the preservation of peri-implant tissue health. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dental%20implant" title="dental implant">dental implant</a>, <a href="https://publications.waset.org/abstracts/search?q=metronidazole" title=" metronidazole"> metronidazole</a>, <a href="https://publications.waset.org/abstracts/search?q=CHX" title=" CHX"> CHX</a>, <a href="https://publications.waset.org/abstracts/search?q=screw%20hole" title=" screw hole"> screw hole</a> </p> <a href="https://publications.waset.org/abstracts/160657/antimicrobial-efficacy-of-075-metronidazole-and-2-chlorhexidine-gel-applied-in-implant-screw-hole-a-clinical-trial" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160657.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">70</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">1174</span> Effect of Carbon Black Nanoparticles Additive on the Qualities of Fly Ash Based Geopolymer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Kiani">Maryam Kiani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to investigate the influence of carbon black additive on the properties of fly ash-based geopolymer. The geopolymer samples were prepared using fly ash as the primary source material, along with an alkali activator solution and different concentrations of carbon black additive. The effects of carbon black on the geopolymer binder were evaluated by analyzing the compressive strength, flexural strength, water absorption, and microstructural properties of the cured samples. The results revealed that the inclusion of carbon black additive significantly enhanced the mechanical properties of the geopolymer binder. The compressive and flexural strengths were found to increase with the addition of carbon black, showing improvements of up to 25% and 15%, respectively. Moreover, the water absorption of the geopolymer samples reduced due to the presence of carbon black, indicating improved resistance against water permeability. Microstructural analysis using scanning electron microscopy (SEM) revealed a more compact and homogenous structure in the geopolymer samples with carbon black. The dispersion of carbon black particles within the geopolymer matrix was observed, suggesting improved interparticle bonding and increased densification. Overall, this study demonstrates the positive impact of carbon black additive on the qualities of fly ash-based geopolymer, emphasizing its potential as an effective enhancer for geopolymer binder applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fly-ash" title="fly-ash">fly-ash</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20black" title=" carbon black"> carbon black</a>, <a href="https://publications.waset.org/abstracts/search?q=nanotechnology" title=" nanotechnology"> nanotechnology</a>, <a href="https://publications.waset.org/abstracts/search?q=geopolymer" title=" geopolymer"> geopolymer</a> </p> <a href="https://publications.waset.org/abstracts/172605/effect-of-carbon-black-nanoparticles-additive-on-the-qualities-of-fly-ash-based-geopolymer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172605.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">113</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">1173</span> Stress Variation around a Circular Hole in Functionally Graded Plate under Bending</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parveen%20K.%20Saini">Parveen K. Saini</a>, <a href="https://publications.waset.org/abstracts/search?q=Mayank%20Kushwaha"> Mayank Kushwaha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of material property variation on stress concentration factor (SCF) due to the presence of a circular hole in a functionally graded material (FGM) plate is studied in this paper. A numerical method based on complex variable theory of elasticity is used to investigate the problem. To achieve the material property, variation plate is decomposed into a number of rings. In this research work, Young's modulus is assumed to be varying exponentially and it is found that stress concentration factor can be reduced by increasing Young’s modulus progressively away from the hole. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stress%20concentration" title="stress concentration">stress concentration</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20hole" title=" circular hole"> circular hole</a>, <a href="https://publications.waset.org/abstracts/search?q=FGM%20plate" title=" FGM plate"> FGM plate</a>, <a href="https://publications.waset.org/abstracts/search?q=bending" title=" bending"> bending</a> </p> <a href="https://publications.waset.org/abstracts/4922/stress-variation-around-a-circular-hole-in-functionally-graded-plate-under-bending" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4922.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">306</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">1172</span> The Impact of Malicious Attacks on the Performance of Routing Protocols in Mobile Ad-Hoc Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Habib%20Gorine">Habib Gorine</a>, <a href="https://publications.waset.org/abstracts/search?q=Rabia%20Saleh"> Rabia Saleh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mobile Ad-Hoc Networks are the special type of wireless networks which share common security requirements with other networks such as confidentiality, integrity, authentication, and availability, which need to be addressed in order to secure data transfer through the network. Their routing protocols are vulnerable to various malicious attacks which could have a devastating consequence on data security. In this paper, three types of attacks such as selfish, gray hole, and black hole attacks have been applied to the two most important routing protocols in MANET named dynamic source routing and ad-hoc on demand distance vector in order to analyse and compare the impact of these attacks on the Network performance in terms of throughput, average delay, packet loss, and consumption of energy using NS2 simulator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MANET" title="MANET">MANET</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20networks" title=" wireless networks"> wireless networks</a>, <a href="https://publications.waset.org/abstracts/search?q=routing%20protocols" title=" routing protocols"> routing protocols</a>, <a href="https://publications.waset.org/abstracts/search?q=malicious%20attacks" title=" malicious attacks"> malicious attacks</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20networks%20simulation" title=" wireless networks simulation"> wireless networks simulation</a> </p> <a href="https://publications.waset.org/abstracts/88341/the-impact-of-malicious-attacks-on-the-performance-of-routing-protocols-in-mobile-ad-hoc-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88341.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">320</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">1171</span> Optimizing of the Micro EDM Parameters in Drilling of Titanium Ti-6Al-4V Alloy for Higher Machining Accuracy-Fuzzy Modelling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20A.%20D.%20Sarhan">Ahmed A. D. Sarhan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mum%20Wai%20Yip"> Mum Wai Yip</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Sayuti"> M. Sayuti</a>, <a href="https://publications.waset.org/abstracts/search?q=Lim%20Siew%20Fen"> Lim Siew Fen </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ti6Al4V alloy is highly used in the automotive and aerospace industry due to its good machining characteristics. Micro EDM drilling is commonly used to drill micro hole on extremely hard material with very high depth to diameter ratio. In this study, the parameters of micro-electrical discharge machining (EDM) in drilling of Ti6Al4V alloy is optimized for higher machining accuracy with less hole-dilation and hole taper ratio. The micro-EDM machining parameters includes, peak current and pulse on time. Fuzzy analysis was developed to evaluate the machining accuracy. The analysis shows that hole-dilation and hole-taper ratio are increased with the increasing of peak current and pulse on time. However, the surface quality deteriorates as the peak current and pulse on time increase. The combination that gives the optimum result for hole dilation is medium peak current and short pulse on time. Meanwhile, the optimum result for hole taper ratio is low peak current and short pulse on time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Micro%20EDM" title="Micro EDM">Micro EDM</a>, <a href="https://publications.waset.org/abstracts/search?q=Ti-6Al-4V%20alloy" title=" Ti-6Al-4V alloy"> Ti-6Al-4V alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20logic%20based%20analysis" title=" fuzzy logic based analysis"> fuzzy logic based analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=machining%20accuracy" title=" machining accuracy"> machining accuracy</a> </p> <a href="https://publications.waset.org/abstracts/21772/optimizing-of-the-micro-edm-parameters-in-drilling-of-titanium-ti-6al-4v-alloy-for-higher-machining-accuracy-fuzzy-modelling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21772.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">496</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">1170</span> Structural Analysis of Hole-Type Plate for Weight Lightening of Road Sign</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joon-Yeop%20Na">Joon-Yeop Na</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang-Keun%20Baik"> Sang-Keun Baik</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyu-Soo%20Chong"> Kyu-Soo Chong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Road sign sizes are related to their support and foundation, and the large-scale support that is generally installed at roadsides can cause inconvenience to pedestrians and damage the urban landscape. The most influential factor in determining the support and foundation of road signs is the wind load. In this study, we introduce a hole-type road sign to analyze its effects on reducing wind load. A hole-type road sign reduces the drag coefficient that is applied when considering the air and fluid resistance of a plate when the wind pressure is calculated, thus serving as an effective option for lightening the weights of road sign structures. A hole-type road sign is punctured with a perforator. Furthermore, the size of the holes and their distance is determined considering the damage to characters, the poor performance of reflective sheets, and legibility. For the calculation of the optimal specification of a hole-type road sign, we undertook a theoretical examination for reducing the wind loads on hole-type road signs, and analyzed the bending and reflectivity of sample road sign plates. The analytic results confirmed that a hole-type road sign sample that contains holes of 6 mm in diameter with a distance of 18 mm between the holes shows reflectivity closest to that of existing road signs; moreover, the average bending moment resulted in a reduction of 4.24%, and the support’s diameter is reduced by 40.2%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hole%20type" title="hole type">hole type</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20sign" title=" road sign"> road sign</a>, <a href="https://publications.waset.org/abstracts/search?q=weight%20lightening" title=" weight lightening"> weight lightening</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20load" title=" wind load"> wind load</a> </p> <a href="https://publications.waset.org/abstracts/11317/structural-analysis-of-hole-type-plate-for-weight-lightening-of-road-sign" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11317.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">546</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">1169</span> Impacts of Racialization: Exploring the Relationships between Racial Discrimination, Racial Identity, and Activism</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Brianna%20Z.%20Ross">Brianna Z. Ross</a>, <a href="https://publications.waset.org/abstracts/search?q=Jonathan%20N.%20Livingston"> Jonathan N. Livingston</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Given that discussions of racism and racial tensions have become more salient, there is a need to evaluate the impacts of racialization among Black individuals. Racial discrimination has become one of the most common experiences within the Black American population. Likewise, Black individuals have indicated a need to address their racial identities at an earlier age than their non-Black peers. Further, Black individuals have been found at the forefront of multiple social and political movements, including but not limited to the Civil Rights Movement, Black Lives Matter, MeToo, and Say Her Name. Moreover, the present study sought to explore the predictive relationships that exist between racial discrimination, racial identity, and activism in the Black community. The results of standard and hierarchical regression analyses revealed that racial discrimination and racial identity significantly predict each other, but only racial discrimination is a significant predictor for the relationship to activism. Nonetheless, the results from this study will provide a basis for social scientists to better understand the impacts of racialization on the Black American population. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activism" title="activism">activism</a>, <a href="https://publications.waset.org/abstracts/search?q=racialization" title=" racialization"> racialization</a>, <a href="https://publications.waset.org/abstracts/search?q=racial%20discrimination" title=" racial discrimination"> racial discrimination</a>, <a href="https://publications.waset.org/abstracts/search?q=racial%20identity" title=" racial identity"> racial identity</a> </p> <a href="https://publications.waset.org/abstracts/129426/impacts-of-racialization-exploring-the-relationships-between-racial-discrimination-racial-identity-and-activism" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129426.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">152</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">1168</span> Improvement in Acoustic Performance at Low Frequency via Application of Acoustic Resistance of Vented Hole in In-Ear Earphones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tzu-Hsuan%20Lei">Tzu-Hsuan Lei</a>, <a href="https://publications.waset.org/abstracts/search?q=Shu-Chien%20Wu"> Shu-Chien Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuang-Che%20Lo"> Kuang-Che Lo</a>, <a href="https://publications.waset.org/abstracts/search?q=Shu-Chi%20Liu"> Shu-Chi Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Cheng%20Liu"> Yu-Cheng Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The focus of this study was on the effects of air propagation associated with vented holes on acoustic resistance properties. A cylindrical hole with diameter and depth of 0.7 mm and 1.0 mm, respectively, was the research target. By constructing a finite element analytical model of its sound field properties, the acoustic-specific airflow resistance relationships were obtained for the differences in sound pressure and flow velocity at the two ends of this vented hole. In addition, the acoustic properties of this vented hole were included in the in-ear earphone simulation model to complete the sound pressure curve simulation analysis of the in-ear earphone system with a vented hole of corresponding size. Then, the simulation results were compared with actual measurements obtained from the standard system. Based on the results, when the in-ear earphone vented hole simulation model considered the simulated specific airflow resistance values of this cylindrical hole, the overall simulated sound pressure performance was highly consistent with that of measured values. The difference in the first peak values of sound pressure at mid-to-low frequencies was reduced from 5.64% when the simulation model did not consider the specific airflow resistance of the cylindrical hole to 1.18%, and the accuracy of the overall simulation was around 70%. This indicates the importance of the acoustic resistance properties of vented holes. Moreover, as specific airflow resistance values were able to be further quantified, the accuracy of the entire in-ear earphone simulation was ultimately and effectively elevated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=specific%20airflow%20resistance" title="specific airflow resistance">specific airflow resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=vented%20holes" title=" vented holes"> vented holes</a>, <a href="https://publications.waset.org/abstracts/search?q=in-ear%20earphone" title=" in-ear earphone"> in-ear earphone</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a> </p> <a href="https://publications.waset.org/abstracts/186158/improvement-in-acoustic-performance-at-low-frequency-via-application-of-acoustic-resistance-of-vented-hole-in-in-ear-earphones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186158.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">43</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">1167</span> Black Bodies Matter: The Contemporary Manifestation of Saartjie Baartman</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rokeshia%20Renn%C3%A9%20Ashley">Rokeshia Renné Ashley</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this study is to understand the perception of historical figure Saartjie 'Sara/Sarah' Baartman from a cross cultural perspective of black women in the United States and black women in South Africa. Semi-structured interviews (n = 30) uncover that many women in both countries did not have an accurate representation, recollection, or have been exposed to the story of Baartman. Nonetheless, those who were familiar with Baartman’s story, those participants compared her to modern examples of black women who are showcased in a contemporary familiarity. The women are described by participants as women who reveal their bodies in a sexualized manner and have the curves that are similar to Baartman’s historic figure. This comparison emphasized a connection to popular images of black women who represent the curvaceous ideal. Findings contribute to social comparison theory by providing a lens for examining black women’s body image. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20women" title="black women">black women</a>, <a href="https://publications.waset.org/abstracts/search?q=body%20modification" title=" body modification"> body modification</a>, <a href="https://publications.waset.org/abstracts/search?q=media" title=" media"> media</a>, <a href="https://publications.waset.org/abstracts/search?q=South%20Africa" title=" South Africa"> South Africa</a> </p> <a href="https://publications.waset.org/abstracts/77461/black-bodies-matter-the-contemporary-manifestation-of-saartjie-baartman" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77461.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">319</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">1166</span> Occurrence and Geological Setting of the Black Shales Outcrops in Malaysia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hassan%20M.%20Baioumy">Hassan M. Baioumy</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuniarti%20Ulfa"> Yuniarti Ulfa </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Paleozoic, Mesozoic and Cenozoic black shales that can be a potential source of energy and precious metals are widely distributed in Malaysia Peninsula, Sarawak and Sabah. Two Paleozoic black shales outcrops were reported in the Langkawi Island belonging to the Cambrian fluvial Machinchang Formation and the Silurian glaciomarine Singa Formation. More the seventeen occurrences of Paleozoic black shales outcrops have been found in the Peninsular Malaysia that range in age from Devonian, Carboniferous, and Permian in the Terengganu, Perlis, Pahang, and Perak States. Mesozoic black shales outcrops occur in several places in both the Peninsular Malaysia and Sarawak. In the Peninsular Malaysia, Triassic black shales occur in the Nami area, Northern Kedah and in the Pahang area. In Sarawak, Triassic black shales have been reported in the Bau area. Cenozoic black shales outcrops were reported in both Sarawak at Miri area and Sabah at the Ranau and Tenom areas. Preliminary mineralogical and geochemical investigations on some of these black shales outcrops showed distinct compositional variations among these black shales outcrops probably due to variations in their source area composition and/or depositional and diagenetic settings of these shales. Some of these shalese also subjected to post-depositional hydrothermal mineralization that enriched these shales with Au-bearing minerals such as pyrite, calchopyrite, and arsenopyrite. Many of the studied black shales outcrops look rich in organic matter, which increase the possibility of using these black shales as an unconventional energy resource. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20shales" title="black shales">black shales</a>, <a href="https://publications.waset.org/abstracts/search?q=energy" title=" energy"> energy</a>, <a href="https://publications.waset.org/abstracts/search?q=mineralization" title=" mineralization"> mineralization</a>, <a href="https://publications.waset.org/abstracts/search?q=Malaysia" title=" Malaysia"> Malaysia</a> </p> <a href="https://publications.waset.org/abstracts/12781/occurrence-and-geological-setting-of-the-black-shales-outcrops-in-malaysia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12781.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">428</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">1165</span> A Particle Image Velocimetric (PIV) Experiment on Simplified Bottom Hole Flow Field</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Heqian%20Zhao">Heqian Zhao</a>, <a href="https://publications.waset.org/abstracts/search?q=Huaizhong%20Shi"> Huaizhong Shi</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhongwei%20Huang"> Zhongwei Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhengliang%20Chen"> Zhengliang Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ziang%20Gu"> Ziang Gu</a>, <a href="https://publications.waset.org/abstracts/search?q=Fei%20Gao"> Fei Gao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulics mechanics is significantly important in the drilling process of oil or gas exploration, especially for the drill bit. The fluid flows through the nozzles on the bit and generates a water jet to remove the cutting at the bottom hole. In this paper, a simplified bottom hole model is established. The Particle Image Velocimetric (PIV) is used to capture the flow field of the single nozzle. Due to the limitation of the bottom and wellbore, the potential core is shorter than that of the free water jet. The velocity magnitude rapidly attenuates when fluid close to the bottom is lower than about 5 mm. Besides, a vortex zone appears near the middle of the bottom beside the water jet zone. A modified exponential function can be used to fit the centerline velocity well. On the one hand, the results of this paper can provide verification for the numerical simulation of the bottom hole flow field. On the other hand, it also can provide an experimental basis for the hydraulic design of the drill bit. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oil%20and%20gas" title="oil and gas">oil and gas</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20mechanic%20of%20drilling" title=" hydraulic mechanic of drilling"> hydraulic mechanic of drilling</a>, <a href="https://publications.waset.org/abstracts/search?q=PIV" title=" PIV"> PIV</a>, <a href="https://publications.waset.org/abstracts/search?q=bottom%20hole" title=" bottom hole"> bottom hole</a> </p> <a href="https://publications.waset.org/abstracts/141552/a-particle-image-velocimetric-piv-experiment-on-simplified-bottom-hole-flow-field" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141552.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right 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