Academic literature on the topic 'Forwards Time Travel'
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Journal articles on the topic "Forwards Time Travel"
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Ansuini, Caterina, Andrea Cavallo, Lorenzo Pia, and Cristina Becchio. "The Role of Perspective in Mental Time Travel." Neural Plasticity 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/3052741.
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Recent years have seen accumulating evidence for the proposition that people process time by mapping it onto a linear spatial representation and automatically “project” themselves on an imaginedmental time line. Here, we ask whether people can adopt the temporal perspective of another person when travelling through time. To elucidate similarities and differences between time travelling from one’s own perspective or from the perspective of another person, we asked participants to mentally project themselves or someone else (i.e., a coexperimenter) to different time points. Three basic properties of mental time travel were manipulated: temporal location (i.e., where in time the travel originates: past, present, and future), motion direction (either backwards or forwards), and temporal duration (i.e., the distance to travel: one, three, or five years). We found that time travels originating in the present lasted longer in the self- than in the other-perspective. Moreover, for self-perspective, but not for other-perspective, time was differently scaled depending on where in time the travel originated. In contrast, when considering the direction and the duration of time travelling, no dissimilarities between the self- and the other-perspective emerged. These results suggest that self- and other-projection, despite some differences, share important similarities in structure.
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Boyd, Jeffrey. "A Symmetry Hidden at The Center of Quantum Mathematics Causes a Disconnect Between Quantum Math and Quantum Mechanics." JOURNAL OF ADVANCES IN MATHEMATICS 13, no. 4 (November 24, 2017): 7379–86. http://dx.doi.org/10.24297/jam.v13i4.6413.
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Although quantum mathematics is the most successful science ever, that does not mean we live in the universe described by quantum mechanics. This article is entirely based on symmetry. Two symmetrical universes could have exactly the same mathematics, but differ in other respects. The motivation for seeking symmetry inside quantum mathematics is that the QM picture of nature is bizarre. Richard Feynman says no one can understand it. We propose that the quantum world is not bizarre. QM portrays the wrong universe: the symmetrical one, not the one we inhabit. If quantum waves travel in the opposite direction as what is expected, then we would have the same math but a different universe, one that is recognizable and familiar. Wave equations are symmetrical with respect to time reversal. This means they are symmetrical with respect to wave direction reversal (with time going forwards). This wave equation symmetry is the basis of the symmetry of two models of the universe, only one of which is congruent with the universe we inhabit.
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Liu, Sixin, Zhuo Jia, Yinuo Zhu, Xueran Zhao, and Siyuan Cheng. "Optimized Refraction Travel Time Tomography." Applied Sciences 9, no. 24 (December 11, 2019): 5439. http://dx.doi.org/10.3390/app9245439.
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In seismic refraction exploration, travel time tomography is the most widely used method in engineering and environmental geophysical exploration. In this paper, we mainly optimize the travel time tomography of refraction. First, with respect to the forward algorithm, we introduce a new travel time calculation method to improve the accuracy and efficiency of forward calculation. Based on the fast marching method (FMM), we introduce an improved forward calculation method called the multi-stencil fast marching method (MSFM). In the process of inversion, we propose a dynamic prior model composite constraint (DPMCC) method based on the T0 difference method from the idea of multi-scale inversion. Meanwhile, we use the prior information to improve the accuracy of inversion. Furthermore, we use the dynamic regularization factor selection method to make the inversion solution more stable and reliable. Finally, we test and analyze the synthetic data and the measured data to verify the effectiveness of the optimized travel time tomography algorithm.
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D'Argembeau, Arnaud, and Martial Van der Linden. "Emotional aspects of mental time travel." Behavioral and Brain Sciences 30, no. 3 (June 2007): 320–21. http://dx.doi.org/10.1017/s0140525x07002051.
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AbstractWe consider three possible reasons why humans might accord a privileged status to emotional information when mentally traveling backward or forward in time. First, mental simulation of emotional situations helps one to make adaptive decisions. Second, it can serve an emotion regulation function. Third, it helps people to construct and maintain a positive view of the self.
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Pandey, Prateek, and Ratnesh Litoriya. "Technology intervention for preventing COVID-19 outbreak." Information Technology & People 34, no. 4 (May 12, 2021): 1233–51. http://dx.doi.org/10.1108/itp-05-2020-0298.
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PurposeThe purpose for writing this article is derived from the misery and chaos prevalent in the world due to the coronavirus pandemic – since late 2019 and still continuing as of December 2020.Design/methodology/approachA blockchain-based solution to verify the country visit trail and disease and treatment history of the passengers who arrive at the immigration counters located at various national borders and entry points is proposed. A fuzzy inference based suspect identifier system is also presented in this article that could be utilized to make further decisions based on the degree of suspicion observed on a particular passenger.FindingsThis paper attempted to put forth a blockchain-based system which consumes the healthcare and visit trail summary of a passenger (appearing for an interview before an immigration officer) and forwards it to a fuzzy inference system to reach to a conclusion that the passenger should be advised to self-quarantine, detained, or should be allowed to enter. Such a system would help to make correct decisions at the immigration counters to check pandemic diseases, like COVID-19, right at the entry points.Research limitations/implicationsThe implications of this work are manifold. First, the proposed framework works independent of the type of pandemic and is a readymade tool to check the spread of disease through infected human carriers. Second, the proposed framework will keep the mortality rates under check, which would give ample time for the authorities to save the lives of the people with co-morbidities and age vulnerabilities (Vichitvanichphong et al., 2018). Third, it is a general phenomenon to restrict the flights from the country where the first few cases of infection are discovered; however, the infected person, at the same time, might travel through alternative routes. The blockchain-enabled proposed framework ensures the detection of such cases at no other cost. Finally, the solution may appear costly in the first place, but it has the potential to hold back the revenue of the countries that would otherwise be spent on reactive measures.Originality/valueAs of now no other study or research article provides the solution to the biggest problem persists in the world in this way. The contribution is original and worth applying.
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Liu, Linan, Xiaomeng Zhao, Xinghui Yin, and Muhammad Aqeel Ashraf. "Image Fusion for Travel Time Tomography Inversion." Polish Maritime Research 22, s1 (September 1, 2015): 149–56. http://dx.doi.org/10.1515/pomr-2015-0047.
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Abstract The travel time tomography technology had achieved wide application, the hinge of tomography was inversion algorithm, the ray path tracing technology had a great impact on the inversion results. In order to improve the SNR of inversion image, comprehensive utilization of inversion results with different ray tracing can be used. We presented an imaging fusion method based on improved Wilkinson iteration method. Firstly, the shortest path method and the linear travel time interpolation were used for forward calculation; then combined the improved Wilkinson iteration method with super relaxation precondition method to reduce the condition number of matrix and accelerate iterative speed, the precise integration method was used to solve the inverse matrix more precisely in tomography inversion process; finally, use wavelet transform for image fusion, obtain the final image. Therefore, the ill-conditioned linear equations were changed into iterative normal system through two times of treatment and using images with different forward algorithms for image fusion, it reduced the influence effect of measurement error on imaging. Simulation results showed that, this method can eliminate the artifacts in images effectively, it had extensive practical significance.
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Mieth, Laura, Raoul Bell, and Axel Buchner. "The “Mnemonic Time-Travel Effect”." Experimental Psychology 66, no. 6 (November 2019): 437–42. http://dx.doi.org/10.1027/1618-3169/a000461.
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Abstract. This registered report aims at replicating the so-called “mnemonic time-travel” effect. Aksentijevic, Brandt, Tsakanikos, and Thorpe (2019) reported that memory was improved when their participants experienced backward motion before a memory test in comparison to when they experienced forward motion or no motion. This finding was interpreted as suggesting that backward motion brought individuals back to the moment of encoding. In the original study, the mnemonic time-travel effect was robustly found with various types of backward motion (real, simulated, and imagined). Such a spectacular finding calls for a preregistered replication. To determine the robustness of the effect, we performed a close replication of Experiment 4 of Aksentijevic et al. in which the mnemonic time-travel effect was most pronounced. Despite sufficient statistical power to detect an even considerably smaller effect than the one reported by Aksentijevic et al., we found no significant differences among the different motion conditions. The present results thus disconfirm the idea that experiencing backward motion improves memory which suggests that the empirical robustness of the mnemonic time travel effect should be further scrutinized before any conclusions about mnemonic space and time can be drawn.
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Blake, David, and John Pickles. "Mental Time Travel and Retirement Savings." Journal of Risk and Financial Management 14, no. 12 (December 3, 2021): 581. http://dx.doi.org/10.3390/jrfm14120581.
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We portray the valuation of retirement savings in terms of a mental time travel journey in which a proposed contribution to a pension plan is projected forward to the plan member’s retirement date and this projected value is then discounted back to today, thereby giving a present or personal value. We set this within a broader framework of pension planning, which seeks to smooth consumption over the lifecycle. We explain how two psychological biases—exponential growth bias and present bias—can lead to a difference between the initial value of a pension contribution and its present value, such a difference reflecting an asymmetry between projection and discounting, and how such a difference might lead to inadequate retirement savings and hence to a lower than desired standard of living in retirement. We consider how the two biases might be mitigated.
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Tong, P., D. Zhao, D. Yang, X. Yang, J. Chen, and Q. Liu. "Wave-equation-based travel-time seismic tomography – Part 1: Method." Solid Earth 5, no. 2 (November 26, 2014): 1151–68. http://dx.doi.org/10.5194/se-5-1151-2014.
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Abstract. In this paper, we propose a wave-equation-based travel-time seismic tomography method with a detailed description of its step-by-step process. First, a linear relationship between the travel-time residual Δt = Tobs–Tsyn and the relative velocity perturbation δ c(x)/c(x) connected by a finite-frequency travel-time sensitivity kernel K(x) is theoretically derived using the adjoint method. To accurately calculate the travel-time residual Δt, two automatic arrival-time picking techniques including the envelop energy ratio method and the combined ray and cross-correlation method are then developed to compute the arrival times Tsyn for synthetic seismograms. The arrival times Tobs of observed seismograms are usually determined by manual hand picking in real applications. Travel-time sensitivity kernel K(x) is constructed by convolving a~forward wavefield u(t,x) with an adjoint wavefield q(t,x). The calculations of synthetic seismograms and sensitivity kernels rely on forward modeling. To make it computationally feasible for tomographic problems involving a large number of seismic records, the forward problem is solved in the two-dimensional (2-D) vertical plane passing through the source and the receiver by a high-order central difference method. The final model is parameterized on 3-D regular grid (inversion) nodes with variable spacings, while model values on each 2-D forward modeling node are linearly interpolated by the values at its eight surrounding 3-D inversion grid nodes. Finally, the tomographic inverse problem is formulated as a regularized optimization problem, which can be iteratively solved by either the LSQR solver or a~nonlinear conjugate-gradient method. To provide some insights into future 3-D tomographic inversions, Fréchet kernels for different seismic phases are also demonstrated in this study.
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Suliyanti, Rini. "Evaluasi Kinerja Dalam Pelayanan Kereta Rel Listrik Eksekutif Jabodetabek." Warta Penelitian Perhubungan 22, no. 1 (January 31, 2010): 59–71. http://dx.doi.org/10.25104/warlit.v22i1.996.
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The Problem that need to be handle at the moment is an unbalance demand for the executive class inrailwm; services accross Jabodetabek during rush hour traffic with the utilities capacity available,which is make low qualihJ factor of service . Conneccted to the problems above, various efforts ha-uebeen made btJ Kereta Api ( Persero), but it was not yet maximum refraction. So this str.A.dy wasconducted to determine the service performance of KRL, Executive Jabodetabek Using Seater Plotanalysis approach, btj set forward the analysis that need attention and imprmiement is the accuracyof trafel time, waiting time, standard rooms and llounge facilities, standards and facilities up dawninformation systems in train, there are variables which are not problematic, but needs tobe preservedis the level of safehJ, standard lighting, and expousure, air circulation, but there are other things thatneed attention is the level of travel speed trains, ticket purchase service information system at thestation, accuraciJ of travel time, waiting time of arrival, facilities for passenger trains up and dawn.Keyword : Level of service, KRL Jabodetabek, Eksekutif Class.
Dissertations / Theses on the topic "Forwards Time Travel"
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Mohamed, Ibrahim Daoud Ahmed. "Automatic history matching in Bayesian framework for field-scale applications." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3170.
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Conditioning geologic models to production data and assessment of uncertainty is generally done in a Bayesian framework. The current Bayesian approach suffers from three major limitations that make it impractical for field-scale applications. These are: first, the CPU time scaling behavior of the Bayesian inverse problem using the modified Gauss-Newton algorithm with full covariance as regularization behaves quadratically with increasing model size; second, the sensitivity calculation using finite difference as the forward model depends upon the number of model parameters or the number of data points; and third, the high CPU time and memory required for covariance matrix calculation. Different attempts were used to alleviate the third limitation by using analytically-derived stencil, but these are limited to the exponential models only.
We propose a fast and robust adaptation of the Bayesian formulation for inverse modeling that overcomes many of the current limitations. First, we use a commercial finite difference simulator, ECLIPSE, as a forward model, which is general and can account for complex physical behavior that dominates most field applications. Second, the production data misfit is represented by a single generalized travel time misfit per well, thus effectively reducing the number of data points into one per well and ensuring the matching of the entire production history. Third, we use both the adjoint method and streamline-based sensitivity method for sensitivity calculations. The adjoint method depends on the number of wells integrated, and generally is of an order of magnitude less than the number of data points or the model parameters. The streamline method is more efficient and faster as it requires only one simulation run per iteration regardless of the number of model parameters or the data points. Fourth, for solving the inverse problem, we utilize an iterative sparse matrix solver, LSQR, along with an approximation of the square root of the inverse of the covariance calculated using a numerically-derived stencil, which is broadly applicable to a wide class of covariance models.
Our proposed approach is computationally efficient and, more importantly, the CPU time scales linearly with respect to model size. This makes automatic history matching and uncertainty assessment using a Bayesian framework more feasible for large-scale applications. We demonstrate the power and utility of our approach using synthetic cases and a field example. The field example is from Goldsmith San Andres Unit in West Texas, where we matched 20 years of production history and generated multiple realizations using the Randomized Maximum Likelihood method for uncertainty assessment. Both the adjoint method and the streamline-based sensitivity method are used to illustrate the broad applicability of our approach.
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Micklethwait, Guy Roland. "Models of Time Travel: a comparative study using films." Phd thesis, 2012. http://hdl.handle.net/1885/9486.
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This research identifies the way the science of time travel is presented to the public through the medium of feature films, and discovers if this can be used to construct a comprehensive set of models about time travel and its consequences.
There is no universally accepted understanding of what constitutes the nature of time. Even though the fundamental laws of physics do not prohibit time travel, scientists and philosophers do not agree about what would happen if backwards time travel ever became a reality.
I identified models that scientists and philosophers have produced about the nature of time, time travel and other temporal phenomena. I then determined the model of time used in each of the 100 time travel films that I reviewed. I also used a verbal survey to elicit the personal models of time travel for each participant of three focus groups I conducted with members of the movie-going public. I compared these models of time with the personal models used by members of the movie-going public and synthesised them to develop a comprehensive set of 21 models of time. The "guyline" diagrams that I devised proved to be a very useful tool for analysing how the timelines of the time travellers behaved in each film.
My research has shown that an investigation of time travel in films can indeed be used to construct useful models of time based on the evidence of the 21 models that I developed. Furthermore, I showed that both my models of time travel and my guyline diagrams helped to structure conversations about time with members of the movie-going public. The findings of this thesis can be used by scientists, philosophers, filmmakers and the public to help them clarify our thinking about time travel, the nature of time, how it is communicated, and also in future research.
Books on the topic "Forwards Time Travel"
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Pausacker, Jenny. Fast forward. New York: Lothrop, Lee & Shepard Books, 1991.
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Pausacker, Jenny. Fast forward. North Ryde, NSW, Australia: Angus & Robertson, 1989.
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Sommer, Carl. Fast forward. Houston: Advance Pub., 2009.
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Sommer, Carl. Fast forward =: Avance acelarado. Houston: Advance Pub., 2009.
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New York (State). Legislature. Senate. Committee on Corporations, Authorities, and Commissions. Public hearing in the matter on redevelopment of the World Trade Center, time to move forward. New York]: Candyco Transcription Service, Inc., 2009.
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Past Forward. Simon & Schuster (UK), 2010.
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Emmons, Katherine. Meet the Robinsons: Keep Moving Forward (Meet the Robinsons). HarperEntertainment, 2007.
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Fast-Forward to the Future. Scholastic, Incorporated, 2019.
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Fast-Forward to the Future. Scholastic, Incorporated, 2019.
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Meehl, Brian. Blowback '07: When the Only Way Forward Is Back. MCP Books, 2016.
Find full textBook chapters on the topic "Forwards Time Travel"
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McNeill, Fergus, Phil Crockett Thomas, Lucy Cathcart Frödén, Jo Collinson Scott, Oliver Escobar, and Alison Urie. "Time After Time: Imprisonment, Re-entry and Enduring Temporariness." In Time and Punishment, 171–201. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-12108-1_7.
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AbstractThis chapter aims to address the scant attention that has been paid to time and temporalities in re-entry and re/integration research. Drawing on data from the ‘Distant Voices—Coming Home’ project, which used creative methods to explore re/integration after punishment—we illustrate and analyse three ‘travails’ of penal time. We use the term travails here to stress the significant, difficult and active work involved in addressing these temporal challenges. Respectively, these travails concern the struggles caused by ‘de-synchrony’ between time inside and outside of prison and the problems of ‘re-synchrony’ that it creates; the contestation of ‘readiness’ for progression and release; and the problem of living with the paradox of ‘enduring temporariness’. In our conclusion, we argue that tackling these three challenges requires people re-entering society to travel not just through spaces and to places but also through time, both backwards and forwards. These journeys are fraught with both difficulty and danger.
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Li, Yaping, and Suping Yu. "The Research of Travel-Time Tomography Based on Forward Calculation and Inversion." In Proceedings of International Conference on Soft Computing Techniques and Engineering Application, 491–98. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1695-7_57.
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Tartara, Patrizia. "Along the Caeretan coast and forward on." In Proceedings e report, 127–36. Florence: Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-147-1.14.
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The territory along the coast north-west of Ro me, still well preserved; in the Etruscan period was for the most under Caere control; it had the three important ports. The territory of Caere has been analyzed for a long time now, through an historical-topographic analytical study of the traces of archaeological remains. The research has been carried out by use of historical and recent aerial photographs and glass slides, last but not least the contribution of the monitoring aerial flights operated with the Carabinieri Helicopter Group of Pratica di Mare.
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Effingham, Nikk. "Modes of Time Travel." In Time Travel, 11–24. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198842507.003.0002.
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This chapter discusses the ways in which one might travel back in time. Of course, there are no actual, known instances of time travel, so the different modes are drawn from fiction, historical thought, and speculative physics: perhaps we could ‘teleport’, discontinuously, back into the past; perhaps we could travel back into the past in the same way we persist forwards, traversing the intervening instants between ourselves and the past; perhaps we instead warp spacetime to allow us to come back to where we began. The chapter ends by discussing two things that are not technically time travel—cases of frozen time and time being an illusion—which are nevertheless closely connected.
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Stevenson, Randall. "‘Time is Over’: Postmodern Times." In Reading the Times, 160–219. Edinburgh University Press, 2018. http://dx.doi.org/10.3366/edinburgh/9781474401555.003.0006.
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The Cold War and the nuclear threat made it as difficult, after 1945, to look forward affirmatively as to look back. Enlightenment ideas of a ‘project of modernity’ gave way to postmodern scepticism and stasis, reflected by Samuel Beckett and the nouveau roman, and in other ways in the fiction of Malcolm Lowry and Thomas Mann and the repetitive chronologies of Joyce Cary, Lawrence Durrell and others. After the 1960s, authors such as Muriel Spark confronted the Holocaust and recent history more directly, as in later decades did Ian McEwan, Martin Amis, Graham Swift and others. In this fiction, and generally later in the century, concerns with the clock’s constraints were diminished by long familiarity and by several new factors. These included technologies of film, video, globalised media and the internet, along with increased international travel and encounters with less industrialised cultures. Science fiction, too, and imagination of time-travel, was both symptomatic yet partly redemptive of horological stress. There remained, however, numerous (often historical) novels by authors such as Gabriel García Marquéz, Salman Rushdie, Alasdair Gray and Thomas Pynchon – re-examining, in Mason & Dixon, C18th practices of global measurement – still concerned with the stresses clockwork chronology imposed on modern history.
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Meisner, Nadine. "Looking Back, Moving Forward." In Marius Petipa, 77–106. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190659295.003.0005.
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After Petipa’s marriage to his first muse, Maria Surovshchikova, and the death in Russia of his father, Jean, chapter 4 travels back in time to trace Jean’s career as a ballet master in Marseilles and in Brussels at the Théâtre de la Monnaie. It describes Marius’s early family life, his siblings, and the impact of the Belgian Revolution. Returning to Russia, it looks at Petipa’s impact as a teacher and his choreographic beginnings in St Petersburg, which included the one-act Parisian Market. This is the ballet the Petipas took with them to show at the Paris Opera with Maria Petipa dancing, a season which triggered two law-suits, one of them involving Petipa’s old friend Perrot. There then follows an account of the circumstances around The Pharaoh’s Daughter, the big ballet that brought Petipa to prominence.
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Atkinson, Martin E. "The face and superficial neck." In Anatomy for Dental Students. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199234462.003.0032.
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The surface anatomies of the face and neck and their supporting structures that can be palpated have been described in Chapter 20. It is now time to move to the structures that lie under the skin but which cannot be identified by touch starting with the neck and moving up on to the face and scalp. The cervical vertebral column comprises the seven cervical vertebrae and the intervening intervertebral discs. These have the same basic structure as the thoracic vertebrae described in Section 10.1.1. Examine the features of the cervical vertebra shown in Figure 23.1 and compare it with the thoracic vertebra shown in Figure 10.3. You will see that cervical vertebrae have a small body and a large vertebral foramen. They also have two distinguishing features, a bifid spinous process and a transverse foramen, piercing each transverse process; the vertebral vessels travel through these foramina. The first and second vertebrae are modified. The first vertebra, the atlas, has no body. Instead, it has two lateral masses connected by anterior and posterior arches. The lateral masses have concave superior facets which articulate with the occipital condyles where nodding movements of the head take place at the atlanto-occipital joints. The second cervical vertebra, the axis, has a strong odontoid process (or dens because of its supposed resemblance to a tooth) projecting upwards from its body. This process is, in fact, the body of the first vertebra which has fused with the body of the axis instead of being incorporated into the atlas. The front of the dens articulates with the back of the anterior arch of the atlas; rotary (shaking) movements of the head occur at this joint. The seventh cervical vertebra has a very long spinous process which is easily palpable. The primary curvature of the vertebral column is concave forwards and this persists in the thoracic and pelvic regions. In contrast, the cervical and lumbar parts of the vertebral column are convexly curved anteriorly. These anterior curvatures are secondary curvatures which appear in late fetal life. The cervical curvature becomes accentuated in early childhood as the child begins to support its own head and the lumbar curve develops as the child begins to sit up.
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Wiberg, Mikael. "Moving Forward." In The Materiality of Interaction. The MIT Press, 2018. http://dx.doi.org/10.7551/mitpress/9780262037518.003.0009.
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At last - everything must come to an end. However, and instead of concluding this book with a final chapter that summarizes some of the main arguments presented here, I see this final chapter as an opportunity to look back, and as an opportunity for thinking about how to move forward. The focus for this book is on the ‘material turn’ in our field – how it has played out historically across the history of computing, how it has fueled a discussion on materiality in HCI, and how now sets the scene for a material-centered approach to interaction design. With one such focus I think that its important to understand that a turn is not a state, but rather a movement, and accordingly a process we should not just follow, understand and describe, but something that we should follow, probably try to trace the origins of, and probably also a process that we should try to make some predictions about in terms of where we are going. In short, how did we end up here? And where are we going next? So, in line with these lines of thinking, I suggest that it is now time for us to look back, in order to move forward.
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ap Siôn, Pwyll. "“Moving Forward, Looking Back”." In Rethinking Reich, 53–74. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190605285.003.0003.
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This chapter traces the influence of the Western classical tradition on Steve Reich’s musical language with reference to his important work Octet, composed in 1979 then subsequently reorchestrated and renamed Eight Lines. Previous scholarly accounts of this work have focused on Reich’s use of extended melodic lines, drawing on the composer’s own comments that these were derived from his immersion at the time in Hebrew cantillation. While acknowledging Reich’s debt to Jewish music, this chapter locates Eight Lines within the broader context of the European tours with his ensemble during the early to mid-1970s. The innovative melodic lines in Eight Lines are constructed around largely goal-oriented harmonic (that is to say, “Western”) structures as much as through the composer’s own immersion in cantillation music, suggesting that his style from this point onward can be read more as a synthesis of Western and non-Western influences.
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Nsubuga, Jonathan. "Time Travel in Heritage Reconstruction: The Case of the Kasubi Royal Tombs at Kampala, Uganda." In Heritage Reconstruction and People: Integrated Recovery After Trauma, 245–56. Arab Regional Centre for World Heritage, 2022. http://dx.doi.org/10.56500/c-r2131.
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This paper looks at the case of the Kasubi Royal Tombs World Heritage Site in Kampala, Uganda. The site suffered two devastating fires during the past decade, affecting its status and functioning as a living site, whose custodians and stakeholders include the spirits of the kings buried there, their ‘wives’ and spirit mediums, their peers at other similar tomb sites, and the representatives of the various clans with a ritual role in maintenance and rebuilding of the material structures. It is thus a focal point for immaterial heritage and this essay examines the role of the ancestors and their representatives in paving a path forward and formulating solutions for the living when faced with crises and disaster, at times when society has to address tangible challenges. It looks at past events, pronunciations, and pacts, whose patterning has proven critical for orienting the various interested parties towards the future, informing future generations, and building capacity. The paper looks at the various lessons this involves for specialists and professionals taking a people-centred approach to the recovery and reconstruction of severely damaged cultural heritage.
Conference papers on the topic "Forwards Time Travel"
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Wisitpongphan, Nawaporn, Watchareewan Jitsakul, and Duangporn Jieamumporn. "Travel Time Prediction Using Multi-layer Feed Forward Artificial Neural Network." In 2012 4th International Conference on Computational Intelligence, Communication Systems and Networks (CICSyN 2012). IEEE, 2012. http://dx.doi.org/10.1109/cicsyn.2012.67.
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Shah, Syed, Narith Saum, and Mongkut Piantanakulchai. "Impact of Variable Travel Time on the Solution of Vehicle Routing Problem: A Case Study of Bangkok." In The SLIIT International Conference on Engineering and Technology 2022. Faculty of Engineering, SLIIT, 2022. http://dx.doi.org/10.54389/ijyh7022.
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In the logistics industry, it is essential to have optimized vehicle routes for cost-effectiveness and customer satisfaction. However, most conventional studies on vehicle routing problem (VRP) do not consider the variation in travel time, leading to nonoptimal routes. This study shows the importance of variation in travel time for different times of the day and different days of the week by comparing the optimization results of vehicle routes for constant travel time and variable travel time. Two different scenarios were considered for Bangkok city, Case-1, where customers are scattered across the city, while Case-2, where customers are concentrated on a small area. It was concluded that up to 27.59% error in travel time could be obtained with an average of 12% for Case-1. At the same time, a maximum 30.85% error in travel time can be obtained with an average of 7% for Case-2. Therefore, it is necessary to consider time-dependent travel time in urban logistics route planning in Bangkok. This study also put forward a method to collect travel time data of different origin-destination pairs for different times of the day and different days of the week that can be used by any logistics company. KEYWORDS: Time-Dependent VRP, Variable Travel Time, VRP Optimization
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Lin, Yi-Ting, Wen-Chi Shiue, and Ing-Jer Huang. "A multi-resolution AHB bus tracer for real-time compression of forward/backward traces in a circular buffer." In the 45th annual conference. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1391469.1391687.
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Lewis, James K. "Numerical Experiments of Acoustic Path Travel Time Variations Due to Combined Surface Wave Effects." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-80026.
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A study was conducted to investigate the impacts of various ocean surface wave effects on ray path arrival times between an acoustic source and receiver. Observations collected during 2003 showed arrival time variations up to 6 ms over ∼30 s intervals. Numerical experiments were performed to see if these variations could be accounted for by wave-induced background currents, the Doppler effect resulting from surface motion due to waves, and changes in path lengths due to sea level variations due to waves. The simulations gave maximum impacts on travel times of < 1 ms. The Doppler effect was quite small, with the effect of the wave-induced currents at times being ∼3 times larger than the Doppler effect. The greatest effect on travel times was the change in path length due to wave-induced sea level changes. The work suggests that the larger observed arrival time variations are a result of some phenomenon that occasionally masks ray paths between a source and receiver. Based on the numerical experiments and observations, a paradigm is put forward to best determine arrival times.
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Weiland, C. J., and P. P. Vlachos. "Spatio-Temporal Development of Supercavitation Over an Impulsively Launched Projectile." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98115.
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Supercavitation inception and formation was studied over blunt projectiles. The projectiles were fired using a gas gun method. In this method, projectiles are launched under the action of expanding detonation gases. Both qualitative and quantitative optical flow diagnostics using high speed digital imaging were used to analyze the spatio-temporal development of the supercavitating flow. For the first time, quantification of the supercavitation was achieved using Time Resolved Digital Particle Image Velocimetry (TRDPIV) detailing the two phase flow field surrounding the translating projectiles and the gas vapor bubble. Experimental results indicate that the supercavity forms at the aft end of the projectile and travels forward along the direction of projectile travel. The impulsive start of the projectile generates two asymmetric vortices which are shed from the blunt nose of the projectile. The vortices interact with the moving cavity and subsequently deform. This interaction is believed to directly contribute to the instabilities in the flight path.
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Miganakallu, Niranjan, Jacob Stafford, Eri Amezcua, Kenneth S. Kim, Chol-Bum M. Kweon, and David A. Rothamer. "Impact of Ignition Assistant on Combustion of Cetane 30 and 35 Jet-Fuel Blends in a Compression-Ignition Engine at Moderate Load and Speed." In ASME 2022 ICE Forward Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icef2022-90704.
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Abstract This study investigates the use of a commercial-off-the-shelf (COTS) ceramic glow-plug to assist ignition of jet fuel blends with cetane numbers of 30 and 35, below the minimum cetane number of 40 for #2 diesel. Experiments were carried out on a single-cylinder compression-ignition engine operating at 1200 RPM for single and dual-injection (pilot + main) timing sweeps. The COTS glow-plug, termed the ignition assistant, was operated at varying input power levels between 0 and 70 W (stock maximum power input is 30 W) at each SOI. Results demonstrate that the use of an ignition assistant at the higher input powers (50 and 70 W) enables operation over a wider range of SOI timings where more advanced times are limited by high pressure-rise rates and more retarded times are limited by rapidly increasing coefficient of variation of gross indicated mean effective pressure. Use of the ignition assistant enables stable combustion at later injection timings increasing the operable range of SOI timings. For the CN 30 fuel, at earlier injection timings, pressure traces and heat release analysis demonstrated the advancement of start of combustion and combustion phasing with the ignition assistant on. At retarded injection timings where combustion would not otherwise occur completely for the CN 30 fuel, operating the ignition assistant at the higher powers enabled combustion phasing to be advanced and combustion to be stabilized at conditions where, with the ignition assistant off, misfire (flameout) would occur. Furthermore, the ignition assistant enabled combustion phasing to follow an approximately linear response with respect to SOI timing over a wider range of SOI times.
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Jang, Jaesung, Demir Akin, Kwan Seop Lim, Michael R. Ladisch, and Rashid Bashir. "Electrostatic Capture of Airborne Nanoparticles in Swirling Flows for Bio-MEMS Applications." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15411.
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Motivated by capture and detection of airborne biological agents in real time, we present the electrostatic capture of 100nm diameter polystyrene nanoparticles as a model system under swirling gas flows in a homemade particle collector having the forward outlet. The particle collector has five small positive electrodes on the bottom and one large grounded electrode on the top. The particles coming into the collector are slowed down during their swirling and stay in the collector before leaving. Particles captured on the center electrode of this collector were much less than those on the surrounding four electrodes and 10 - 25% of the particles with negative charges entering this collector were captured on the bottom electrodes at a flow rate of 1.1 l/min and an applied potential of 2 kV. Using a commercial CFD code FLUENT, we simulated the effects of the different types of collector outlet configurations and flow rates on the particles' trajectories, velocities, and travel times inside the collector. We also present the highest particle capture position inside the collector in those different configurations. The forward outlet configuration is the most favorable to particle capture among the tested configurations in terms of particles' minimum achievable velocities and their travel times at a flow rate of 1.1 l/min. This collector is well adaptable to integration with micro resonator devices and can be used for real-time monitoring of bioaerosols.
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Tilz, Anton, Manuel Gruber, Walter Harrer, Michael Engelmayer, Wolfgang Fimml, Marc Klawitter, and Andreas Wimmer. "Investigation of the Influence of Alternative Spark Plug Electrode Material on Ignition Behavior." In ASME 2022 ICE Forward Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icef2022-88217.
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Abstract Robust engine operation with long maintenance intervals and low emissions is the key to meeting future engine requirements. At the same time, engines should be environmentally friendly, resource-friendly, and cost-effective to produce and operate. To meet these market requirements, a central component in engine development is the ignition system and in particular the spark plug. To increase the maintenance intervals of internal combustion engines, it is necessary to increase spark plug lifetime by reducing spark plug wear. The electrode materials used to date are often expensive and rare, and their mining is not without controversy. Successful use of alternative spark plug electrode materials which are available in large quantities, inexpensive, and more resistant to wear than existing materials with similar ignition behavior would advance engine development so it can meet further economic and environmental requirements. To this end, ceramic spark plug electrodes were investigated to determine their spark and ignition behavior as well as their wear. These materials seem to be an interesting alternative to existing spark plug electrode materials. This paper presents a spark plug with ceramic spark plug electrodes that achieves conditions similar to those of standard spark plugs in terms of secondary voltage trace and ignition behavior. Furthermore, it introduces a sophisticated method for scientific, cost-effective, and application-oriented development. Finally, it provides a promising outlook for the ignition behavior and combustion performance of engines with this spark plug.
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McTaggart, Kevin. "Ship Radiation and Diffraction Forces at Moderate Forward Speed." In SNAME 5th World Maritime Technology Conference. SNAME, 2015. http://dx.doi.org/10.5957/wmtc-2015-009.
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This paper describes numerical evaluation of radiation and diffraction forces for a ship travelling in a seaway at moderate forward speed. The method was developed with the objective of providing efficient and robust force predictions in both the frequency and time domains. For evaluation of radiation and diffraction forces, it is assumed that the ship travels with quasi-steady speed and heading. Time domain computations can include nonlinearities in buoyancy and incident wave excitation forces through evaluation of pressures on the instantaneous wetted hull surface. The paper describes various aspects of the numerical implementation, and also describes limitations that have been determined through verification and validation.
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Chen, Jau-Liang, Hsu-Yang Chang, and Chiang-Sung Wu. "A Study on a Long Range Nano-Precision Positioning System." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42756.
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In this paper a nano-precision positioning system with 1mm travel length, which is composed by a voice coil motor (VCM), flexural stage, an inverted lever, and laser interferometer as positioning sensor, was established. The flexural stage was designed by using genetic algorithm. Because the output force of the VCM is too small, an inverted lever was used to enlarge the output force. A robust controller was designed by using N-times feed-forward control role together with PID control. Three different experiments were conducted: (1) fixed point test; (2) stepping test; and (3) ramp tracking test. From the experiment results, it was found that the bias was equal 0.013 nm with standard deviation (1σ) equals to 3.024 nm, for fixed-point control. While for stepping test, the bias was within 0.2 nm and 1σ value less than 4.5 nm with settling time within 0.17 to 0.71 second. For ramp tracking test, the bias was less than 0.02 nm and 1σ value less than 3.5 nm. Finally, it was found that the smallest step for this positioning system is 10 nm, and can travel 1 mm with bias equal to 0.251 nm, 1σ equals to 3.698 nm.
Reports on the topic "Forwards Time Travel"
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Arhin, Stephen, Babin Manandhar, Hamdiat Baba Adam, and Adam Gatiba. Predicting Bus Travel Times in Washington, DC Using Artificial Neural Networks (ANNs). Mineta Transportation Institute, April 2021. http://dx.doi.org/10.31979/mti.2021.1943.
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Washington, DC is ranked second among cities in terms of highest public transit commuters in the United States, with approximately 9% of the working population using the Washington Metropolitan Area Transit Authority (WMATA) Metrobuses to commute. Deducing accurate travel times of these metrobuses is an important task for transit authorities to provide reliable service to its patrons. This study, using Artificial Neural Networks (ANN), developed prediction models for transit buses to assist decision-makers to improve service quality and patronage. For this study, we used six months of Automatic Vehicle Location (AVL) and Automatic Passenger Counting (APC) data for six Washington Metropolitan Area Transit Authority (WMATA) bus routes operating in Washington, DC. We developed regression models and Artificial Neural Network (ANN) models for predicting travel times of buses for different peak periods (AM, Mid-Day and PM). Our analysis included variables such as number of served bus stops, length of route between bus stops, average number of passengers in the bus, average dwell time of buses, and number of intersections between bus stops. We obtained ANN models for travel times by using approximation technique incorporating two separate algorithms: Quasi-Newton and Levenberg-Marquardt. The training strategy for neural network models involved feed forward and errorback processes that minimized the generated errors. We also evaluated the models with a Comparison of the Normalized Squared Errors (NSE). From the results, we observed that the travel times of buses and the dwell times at bus stops generally increased over time of the day. We gathered travel time equations for buses for the AM, Mid-Day and PM Peaks. The lowest NSE for the AM, Mid-Day and PM Peak periods corresponded to training processes using Quasi-Newton algorithm, which had 3, 2 and 5 perceptron layers, respectively. These prediction models could be adapted by transit agencies to provide the patrons with accurate travel time information at bus stops or online.
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Nafakh, Abdullah Jalal, Franklin Vargas Davila, Yunchang Zhang, Jon D. Fricker, and Dulcy M. Abraham. Safety and Mobility Analysis of Rolling Slowdown for Work Zones: Comparison with Full Closure. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317380.
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There are times when the traffic lanes through a work zone must be kept clear for activities such as placing overhead beams, erecting overhead signs, and installing power lines, and other temporary roadway work activities. As an alternative to a full road closure, a rolling slowdown can typically provide up to 30 minutes to complete such activities without bringing approaching traffic to a complete halt. Using data from recent rolling slowdowns and full closures carried on the Indiana interstate network and a simulation approach, this study compares rolling slowdowns to full closures from safety and mobility standpoints. The study suggests that while rolling slowdowns are more impactful in terms of travel times, they are a safer option than full closures as they often form a forward moving shockwave causing, lower hard braking rates, and consequently a lower probability of causing a crash.
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RESEARCH PRIORITIES: Western Balkans Snapshot. RESOLVE Network, October 2020. http://dx.doi.org/10.37805/rp2020.1.wb.
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Amidst the evolving threat of violent extremism (VE) worldwide, the Western Balkans face substantial challenges to social cohesion and stability. As elsewhere, narratives of religious, far right, and nationalist militancy resonate with vulnerable youth populations in Western Balkan countries where a history of ethnic, religious, and civil strife created a situation vulnerable to terrorist recruitment at home and abroad. Individuals who traveled to fight alongside violent extremist organizations abroad are returning to their home countries following the territorial losses of extremist groups in Syria and Iraq. At the same time, ethno-nationalist extremism continues to gain traction and expand across the region. While some of these topics have received increased attention in the current body of literature, others remain under-researched. Existing research topics also require more field research and deeper conceptual foundation. The resulting gaps in our collective understanding point to the need for further research on evolving social and VE dynamics in the Western Balkans. More rigorous and grounded research, in this regard, can help inform and improve efforts to prevent and counter violent extremism (P/CVE) in the region. In 2019, the RESOLVE Network convened local and international experts to discuss research gaps and develop a preliminary list of research priorities for P/CVE moving forward in the Western Balkans. The topics identified in this Research Priorities Snapshot reflect their collective expertise, in-depth understanding, and commitment to continued analysis of VE trends and dynamics in the region.