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  • Killing-Yano forms and Killing tensors on a warped space

    NASA Astrophysics Data System (ADS)

    Krtouš, Pavel; KubizÅák, David; Kolář, Ivan

    2016-01-01

    We formulate several criteria under which the symmetries associated with the Killing and Killing-Yano tensors on the base space can be lifted to the symmetries of the full warped geometry. The procedure is explicitly illustrated on several examples, providing new prototypes of spacetimes admitting such tensors. In particular, we study a warped product of two Kerr-NUT-(A)dS spacetimes and show that it gives rise to a new class of highly symmetric vacuum (with a cosmological constant) black hole solutions that inherit many of the properties of the Kerr-NUT-(A)dS geometry.

  • WARP: Weight Associative Rule Processor. A dedicated VLSI fuzzy logic megacell

    NASA Technical Reports Server (NTRS)

    Pagni, A.; Poluzzi, R.; Rizzotto, G. G.

    1992-01-01

    During the last five years Fuzzy Logic has gained enormous popularity in the academic and industrial worlds. The success of this new methodology has led the microelectronics industry to create a new class of machines, called Fuzzy Machines, to overcome the limitations of traditional computing systems when utilized as Fuzzy Systems. This paper gives an overview of the methods by which Fuzzy Logic data structures are represented in the machines (each with its own advantages and inefficiencies). Next, the paper introduces WARP (Weight Associative Rule Processor) which is a dedicated VLSI megacell allowing the realization of a fuzzy controller suitable for a wide range of applications. WARP represents an innovative approach to VLSI Fuzzy controllers by utilizing different types of data structures for characterizing the membership functions during the various stages of the Fuzzy processing. WARP dedicated architecture has been designed in order to achieve high performance by exploiting the computational advantages offered by the different data representations.

  • Online Detection of Driver Fatigue Using Steering Wheel Angles for Real Driving Conditions.

    PubMed

    Li, Zuojin; Li, Shengbo Eben; Li, Renjie; Cheng, Bo; Shi, Jinliang

    2017-03-02

    This paper presents a drowsiness on-line detection system for monitoring driver fatigue level under real driving conditions, based on the data of steering wheel angles (SWA) collected from sensors mounted on the steering lever. The proposed system firstly extracts approximate entropy (ApEn)featuresfromfixedslidingwindowsonreal-timesteeringwheelanglestimeseries. Afterthat, this system linearizes the ApEn features series through an adaptive piecewise linear fitting using a given deviation. Then, the detection system calculates the warping distance between the linear features series of the sample data. Finally, this system uses the warping distance to determine the drowsiness state of the driver according to a designed binary decision classifier. The experimental data were collected from 14.68 h driving under real road conditions, including two fatigue levels: "wake" and "drowsy". The results show that the proposed system is capable of working online with an average 78.01% accuracy, 29.35% false detections of the "awake" state, and 15.15% false detections of the "drowsy" state. The results also confirm that the proposed method based on SWA signal is valuable for applications in preventing traffic accidents caused by driver fatigue.

  • ACCRETION KINEMATICS THROUGH THE WARPED TRANSITION DISK IN HD 142527 FROM RESOLVED CO(6–5) OBSERVATIONS

    SciTech Connect

    Casassus, S.; Marino, S.; Pérez, S.

    2015-10-01

    The finding of residual gas in the large central cavity of the HD 142527 disk motivates questions regarding the origin of its non-Keplerian kinematics and possible connections with planet formation. We aim to understand the physical structure that underlies the intra-cavity gaseous flows, guided by new molecular-line data in CO(6–5) with unprecedented angular resolutions. Given the warped structure inferred from the identification of scattered-light shadows cast on the outer disk, the kinematics are consistent, to first order, with axisymmetric accretion onto the inner disk occurring at all azimuths. A steady-state accretion profile, fixed at the stellar accretion rate, explains themore » depth of the cavity as traced in CO isotopologues. The abrupt warp and evidence for near free-fall radial flows in HD 142527 resemble theoretical models for disk tearing, which could be driven by the reported low-mass companion, whose orbit may be contained in the plane of the inner disk. The companion’s high inclination with respect to the massive outer disk could drive Kozai oscillations over long timescales; high-eccentricity periods may perhaps account for the large cavity. While shadowing by the tilted disk could imprint an azimuthal modulation in the molecular-line maps, further observations are required to ascertain the significance of azimuthal structure in the density field inside the cavity of HD 142527.« less

  • Constraints on wrapped Dirac-Born-Infeld inflation in a warped throat

    SciTech Connect

    Kobayashi, Takeshi; Mukohyama, Shinji; Kinoshita, Shunichiro, E-mail: [email protected], E-mail: [email protected], E-mail: [email protected]

    2008-01-15

    We derive constraints on the tensor to scalar ratio and on the background charge of the warped throat for Dirac-Born-Infeld inflation driven by D5- and D7-branes wrapped over cycles of the throat. It is shown that background charge well beyond the known maximal value is required in most cases for Dirac-Born-Infeld inflation to generate cosmological observables compatible with the WMAP3 (Wilkinson Microwave Anisotropy Probe 3) data. Most of the results derived in this paper are insensitive to the details of the inflaton potential, and could be applied to generic warped throats.

  • DISK AROUND STAR MAY BE WARPED BY UNSEEN PLANET

    NASA Technical Reports Server (NTRS)

    2002-01-01

    NASA's Hubble Space Telescope has provided strong evidence for the existence of a roughly Jupiter-sized planet orbiting the star Beta Pictoris. Detailed Hubble images of the inner region of the 200-billion mile diameter dust disk encircling the star reveal an unexpected warp. Researchers say the warp can be best explained as caused by the gravitational pull of an unseen planet. The suspected planet would dwell within a five-billion mile wide clear zone in the center of the disk. This zone has long been suspected of harboring planets that swept it clear of debris, but the Hubble discovery provides more definitive evidence that a planet is there. (Alternative theories suggest the clear zone is empty because it is too warm for ice particles to exist.) 'We were surprised to find that the innermost region of the disk is orbiting in a different plane from the rest of the disk,' says Chris Burrows (Space Telescope Science Institute, Baltimore, Maryland, and the European Space Agency) who is presenting his results at the meeting of the American Astronomical Society in San Antonio, Texas. As he analyzed Hubble images, taken in January 1995 with the Wide Field Planetary Camera 2, Burrows discovered an unusual bulge in the nearly edge-on disk, which was mirrored on the other side of the star. 'Such a warp cannot last for very long,' says Burrows. 'This means that something is still twisting the disk and keeping out of a basic flat shape.' 'The presence of the warp is strong though indirect evidence for the existence of planets in this system. If Beta Pictoris had a solar system like ours, it would produce a warp like the one we see.' Burrows concludes, 'The Beta Pictoris system seems to contain at least one planet not too dissimilar from Jupiter in size and orbit. Rocky planets like Earth might circle Beta Pictoris as well. However, there is no evidence for these yet. Any planet will be at least a billion- times fainter than the star, and presently impossible to view directly

  • The analysis of thin walled composite laminated helicopter rotor with hierarchical warping functions and finite element method

    NASA Astrophysics Data System (ADS)

    Zhu, Dechao; Deng, Zhongmin; Wang, Xingwei

    2001-08-01

    In the present paper, a series of hierarchical warping functions is developed to analyze the static and dynamic problems of thin walled composite laminated helicopter rotors composed of several layers with single closed cell. This method is the development and extension of the traditional constrained warping theory of thin walled metallic beams, which had been proved very successful since 1940s. The warping distribution along the perimeter of each layer is expanded into a series of successively corrective warping functions with the traditional warping function caused by free torsion or free bending as the first term, and is assumed to be piecewise linear along the thickness direction of layers. The governing equations are derived based upon the variational principle of minimum potential energy for static analysis and Rayleigh Quotient for free vibration analysis. Then the hierarchical finite element method is introduced to form a numerical algorithm. Both static and natural vibration problems of sample box beams are analyzed with the present method to show the main mechanical behavior of the thin walled composite laminated helicopter rotor.

  • A method to generate soft shadows using a layered depth image and warping.

    PubMed

    Im, Yeon-Ho; Han, Chang-Young; Kim, Lee-Sup

    2005-01-01

    We present an image-based method for propagating area light illumination through a Layered Depth Image (LDI) to generate soft shadows from opaque and nonrefractive transparent objects. In our approach, using the depth peeling technique, we render an LDI from a reference light sample on a planar light source. Light illumination of all pixels in an LDI is then determined for all the other sample points via warping, an image-based rendering technique, which approximates ray tracing in our method. We use an image-warping equation and McMillan's warp ordering algorithm to find the intersections between rays and polygons and to find the order of intersections. Experiments for opaque and nonrefractive transparent objects are presented. Results indicate our approach generates soft shadows fast and effectively. Advantages and disadvantages of the proposed method are also discussed.

  • Fermion masses and mixing in general warped extra dimensional models

    NASA Astrophysics Data System (ADS)

    Frank, Mariana; Hamzaoui, Cherif; Pourtolami, Nima; Toharia, Manuel

    2015-06-01

    We analyze fermion masses and mixing in a general warped extra dimensional model, where all the Standard Model (SM) fields, including the Higgs, are allowed to propagate in the bulk. In this context, a slightly broken flavor symmetry imposed universally on all fermion fields, without distinction, can generate the full flavor structure of the SM, including quarks, charged leptons and neutrinos. For quarks and charged leptons, the exponential sensitivity of their wave functions to small flavor breaking effects yield hierarchical masses and mixing as it is usual in warped models with fermions in the bulk. In the neutrino sector, the exponential wave-function factors can be flavor blind and thus insensitive to the small flavor symmetry breaking effects, directly linking their masses and mixing angles to the flavor symmetric structure of the five-dimensional neutrino Yukawa couplings. The Higgs must be localized in the bulk and the model is more successful in generalized warped scenarios where the metric background solution is different than five-dimensional anti-de Sitter (AdS5 ). We study these features in two simple frameworks, flavor complimentarity and flavor democracy, which provide specific predictions and correlations between quarks and leptons, testable as more precise data in the neutrino sector becomes available.

  • Modifications to holographic entanglement entropy in warped CFT

    NASA Astrophysics Data System (ADS)

    Song, Wei; Wen, Qiang; Xu, Jianfei

    2017-02-01

    In [1] it was observed that asymptotic boundary conditions play an important role in the study of holographic entanglement beyond AdS/CFT. In particular, the Ryu-Takayanagi proposal must be modified for warped AdS3 (WAdS3) with Dirichlet boundary conditions. In this paper, we consider AdS3 and WAdS3 with Dirichlet-Neumann boundary conditions. The conjectured holographic duals are warped conformal field theories (WCFTs), featuring a Virasoro-Kac-Moody algebra. We provide a holographic calculation of the entanglement entropy and Rényi entropy using AdS3/WCFT and WAdS3/WCFT dualities. Our bulk results are consistent with the WCFT results derived by Castro-Hofman-Iqbal using the Rindler method. Comparing with [1], we explicitly show that the holographic entanglement entropy is indeed affected by boundary conditions. Both results differ from the Ryu-Takayanagi proposal, indicating new relations between spacetime geometry and quantum entanglement for holographic dualities beyond AdS/CFT.

  • A new beam theory using first-order warping functions

    NASA Technical Reports Server (NTRS)

    Ie, C. A.; Kosmatka, J. B.

    1990-01-01

    Due to a certain type of loading and geometrical boundary conditions, each beam will respond differently depending on its geometrical form of the cross section and its material definition. As an example, consider an isotropic rectangular beam under pure bending. Plane sections perpendicular to the longitudinal axis of the beam will remain plane and perpendicular to the deformed axis after deformation. However, due to the Poisson effect, particles in the planes will move relative to each other resulting in a form of anticlastic deformation. In other words, even in pure bending of an isotropic beam, each cross section will deform in the plane. If the material of the beam above is replaced by a generally anisotropic material, then the cross sections will not only deform in the plane, but also out of plane. Hence, in general, both in-plane deformation and out-of-plane warping will exist and depend on the geometrical form and material definition of the cross sections and also on the loadings. For the purpose of explanation, an analogy is made. The geometrical forms of the bodies of each individual are unique. Hence, different sizes of clothes are needed. Finding the sizes of clothes for individuals is like determining the warping functions in beams. A new beam theory using first-order warping functions is introduced. Numerical examples will be presented for an isotropic beam with rectangular cross section. The theory can be extended for composite beams.

  • Online Detection of Driver Fatigue Using Steering Wheel Angles for Real Driving Conditions

    PubMed Central

    Li, Zuojin; Li, Shengbo Eben; Li, Renjie; Cheng, Bo; Shi, Jinliang

    2017-01-01

    This paper presents a drowsiness on-line detection system for monitoring driver fatigue level under real driving conditions, based on the data of steering wheel angles (SWA) collected from sensors mounted on the steering lever. The proposed system firstly extracts approximate entropy (ApEn) features from fixed sliding windows on real-time steering wheel angles time series. After that, this system linearizes the ApEn features series through an adaptive piecewise linear fitting using a given deviation. Then, the detection system calculates the warping distance between the linear features series of the sample data. Finally, this system uses the warping distance to determine the drowsiness state of the driver according to a designed binary decision classifier. The experimental data were collected from 14.68 h driving under real road conditions, including two fatigue levels: “wake” and “drowsy”. The results show that the proposed system is capable of working online with an average 78.01% accuracy, 29.35% false detections of the “awake” state, and 15.15% false detections of the “drowsy” state. The results also confirm that the proposed method based on SWA signal is valuable for applications in preventing traffic accidents caused by driver fatigue. PMID:28257094

  • SPACE WARPS- II. New gravitational lens candidates from the CFHTLS discovered through citizen science

    NASA Astrophysics Data System (ADS)

    More, Anupreeta; Verma, Aprajita; Marshall, Philip J.; More, Surhud; Baeten, Elisabeth; Wilcox, Julianne; Macmillan, Christine; Cornen, Claude; Kapadia, Amit; Parrish, Michael; Snyder, Chris; Davis, Christopher P.; Gavazzi, Raphael; Lintott, Chris J.; Simpson, Robert; Miller, David; Smith, Arfon M.; Paget, Edward; Saha, Prasenjit; Küng, Rafael; Collett, Thomas E.

    2016-01-01

    We report the discovery of 29 promising (and 59 total) new lens candidates from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) based on about 11 million classifications performed by citizen scientists as part of the first SPACE WARPS lens search. The goal of the blind lens search was to identify lens candidates missed by robots (the RINGFINDER on galaxy scales and ARCFINDER on group/cluster scales) which had been previously used to mine the CFHTLS for lenses. We compare some properties of the samples detected by these algorithms to the SPACE WARPS sample and find them to be broadly similar. The image separation distribution calculated from the SPACE WARPS sample shows that previous constraints on the average density profile of lens galaxies are robust. SPACE WARPS recovers about 65 per cent of known lenses, while the new candidates show a richer variety compared to those found by the two robots. This detection rate could be increased to 80 per cent by only using classifications performed by expert volunteers (albeit at the cost of a lower purity), indicating that the training and performance calibration of the citizen scientists is very important for the success of SPACE WARPS. In this work we present the SIMCT pipeline, used for generating in situ a sample of realistic simulated lensed images. This training sample, along with the false positives identified during the search, has a legacy value for testing future lens-finding algorithms. We make the pipeline and the training set publicly available.

  • Trigonal warping and photo-induced effects on zone boundary phonon in monolayer graphene

    NASA Astrophysics Data System (ADS)

    Akay, D.

    2018-05-01

    We have reported the electronic band structure of monolayer graphene when the combined effects arising from the trigonal warp and highest zone-boundary phonons having A1 g symmetry with Haldane interaction which induced photo-irradiation effect. On the basis of our model, we have introduced a diagonalization to solve the associated Fröhlich Hamiltonian. We have examined that, a trigonal warping effect is introduced on the K and K ' points, leading to a dynamical band gap in the graphene electronic band spectrum due to the electron-A1 g phonon interaction and Haldane mass interaction. Additionally, the bands exhibited an anisotropy at this point. It is also found that, photo-irradiation effect is quite smaller than the trigonal warp effects in the graphene electronic band spectrum. In spite of this, controllability of the photo induced effects by the Haldane mass will have extensive implications in the graphene.

  • Band warping, band non-parabolicity, and Dirac points in electronic and lattice structures

    NASA Astrophysics Data System (ADS)

    Resca, Lorenzo; Mecholsky, Nicholas A.; Pegg, Ian L.

    2017-10-01

    We illustrate at a fundamental level the physical and mathematical origins of band warping and band non-parabolicity in electronic and vibrational structures. We point out a robust presence of pairs of topologically induced Dirac points in a primitive-rectangular lattice using a p-type tight-binding approximation. We analyze two-dimensional primitive-rectangular and square Bravais lattices with implications that are expected to generalize to more complex structures. Band warping is shown to arise at the onset of a singular transition to a crystal lattice with a larger symmetry group, which allows the possibility of irreducible representations of higher dimensions, hence band degeneracy, at special symmetry points in reciprocal space. Band warping is incompatible with a multi-dimensional Taylor series expansion, whereas band non-parabolicities are associated with multi-dimensional Taylor series expansions to all orders. Still band non-parabolicities may merge into band warping at the onset of a larger symmetry group. Remarkably, while still maintaining a clear connection with that merging, band non-parabolicities may produce pairs of conical intersections at relatively low-symmetry points. Apparently, such conical intersections are robustly maintained by global topology requirements, rather than any local symmetry protection. For two p-type tight-binding bands, we find such pairs of conical intersections drifting along the edges of restricted Brillouin zones of primitive-rectangular Bravais lattices as lattice constants vary relatively to each other, until these conical intersections merge into degenerate warped bands at high-symmetry points at the onset of a square lattice. The conical intersections that we found appear to have similar topological characteristics as Dirac points extensively studied in graphene and other topological insulators, even though our conical intersections have none of the symmetry complexity and protection afforded by the latter more

  • An inner warp in the DoAr 44 T Tauri transition disk

    NASA Astrophysics Data System (ADS)

    Casassus, Simon; Avenhaus, Henning; Pérez, Sebastián; Navarro, Víctor; Cárcamo, Miguel; Marino, Sebastián; Cieza, Lucas; Quanz, Sascha P.; Alarcón, Felipe; Zurlo, Alice; Osses, Axel; Rannou, Fernando R.; Román, Pablo E.; Barraza, Marcelo

    2018-04-01

    Optical/IR images of transition disks (TDs) have revealed deep intensity decrements in the rings of HAeBes HD 142527 and HD 100453, that can be interpreted as shadowing from sharply tilted inner disks, such that the outer disks are directly exposed to stellar light. Here we report similar dips in SPHERE+IRDIS differential polarized imaging (DPI) of TTauri DoAr 44. With a fairly axially symmetric ring in the sub mm radio continuum, DoAr 44 is likely also a warped system. We constrain the warp geometry by comparing radiative transfer predictions with the DPI data in H band (Qϕ(H)) and with a re-processing of archival 336 GHz ALMA observations. The observed DPI shadows have coincident radio counterparts, but the intensity drops are much deeper in Qϕ(H) (˜88%), compared to the shallow drops at 336 GHz (˜24%). Radiative transfer predictions with an inner disk tilt of ˜30 ± 5 deg approximately account for the observations. ALMA long-baseline observations should allow the observation of the warped gas kinematics inside the cavity of DoAr 44.

  • TWOS - TIME WARP OPERATING SYSTEM, VERSION 2.5.1

    NASA Technical Reports Server (NTRS)

    Bellenot, S. F.

    1994-01-01

    The Time Warp Operating System (TWOS) is a special-purpose operating system designed to support parallel discrete-event simulation. TWOS is a complete implementation of the Time Warp mechanism, a distributed protocol for virtual time synchronization based on process rollback and message annihilation. Version 2.5.1 supports simulations and other computations using both virtual time and dynamic load balancing; it does not support general time-sharing or multi-process jobs using conventional message synchronization and communication. The program utilizes the underlying operating system's resources. TWOS runs a single simulation at a time, executing it concurrently on as many processors of a distributed system as are allocated. The simulation needs only to be decomposed into objects (logical processes) that interact through time-stamped messages. TWOS provides transparent synchronization. The user does not have to add any more special logic to aid in synchronization, nor give any synchronization advice, nor even understand much about how the Time Warp mechanism works. The Time Warp Simulator (TWSIM) subdirectory contains a sequential simulation engine that is interface compatible with TWOS. This means that an application designer and programmer who wish to use TWOS can prototype code on TWSIM on a single processor and/or workstation before having to deal with the complexity of working on a distributed system. TWSIM also provides statistics about the application which may be helpful for determining the correctness of an application and for achieving good performance on TWOS. Version 2.5.1 has an updated interface that is not compatible with 2.0. The program's user manual assists the simulation programmer in the design, coding, and implementation of discrete-event simulations running on TWOS. The manual also includes a practical user's guide to the TWOS application benchmark, Colliding Pucks. TWOS supports simulations written in the C programming language. It is designed

  • A novel approach to estimate emissions from large transportation networks: Hierarchical clustering-based link-driving-schedules for EPA-MOVES using dynamic time warping measures

    SciTech Connect

    Aziz, H. M. Abdul; Ukkusuri, Satish V.

    We present that EPA-MOVES (Motor Vehicle Emission Simulator) is often integrated with traffic simulators to assess emission levels of large-scale urban networks with signalized intersections. High variations in speed profiles exist in the context of congested urban networks with signalized intersections. The traditional average-speed-based emission estimation technique with EPA-MOVES provides faster execution while underestimates the emissions in most cases because of ignoring the speed variation at congested networks with signalized intersections. In contrast, the atomic second-by-second speed profile (i.e., the trajectory of each vehicle)-based technique provides accurate emissions at the cost of excessive computational power and time. We addressed thismore » issue by developing a novel method to determine the link-driving-schedules (LDSs) for the EPA-MOVES tool. Our research developed a hierarchical clustering technique with dynamic time warping similarity measures (HC-DTW) to find the LDS for EPA-MOVES that is capable of producing emission estimates better than the average-speed-based technique with execution time faster than the atomic speed profile approach. We applied the HC-DTW on a sample data from a signalized corridor and found that HC-DTW can significantly reduce computational time without compromising the accuracy. The developed technique in this research can substantially contribute to the EPA-MOVES-based emission estimation process for large-scale urban transportation network by reducing the computational time with reasonably accurate estimates. This method is highly appropriate for transportation networks with higher variation in speed such as signalized intersections. Lastly, experimental results show error difference ranging from 2% to 8% for most pollutants except PM 10.« less

  • A novel approach to estimate emissions from large transportation networks: Hierarchical clustering-based link-driving-schedules for EPA-MOVES using dynamic time warping measures

    DOE PAGES

    Aziz, H. M. Abdul; Ukkusuri, Satish V.

    2017-06-29

    We present that EPA-MOVES (Motor Vehicle Emission Simulator) is often integrated with traffic simulators to assess emission levels of large-scale urban networks with signalized intersections. High variations in speed profiles exist in the context of congested urban networks with signalized intersections. The traditional average-speed-based emission estimation technique with EPA-MOVES provides faster execution while underestimates the emissions in most cases because of ignoring the speed variation at congested networks with signalized intersections. In contrast, the atomic second-by-second speed profile (i.e., the trajectory of each vehicle)-based technique provides accurate emissions at the cost of excessive computational power and time. We addressed thismore » issue by developing a novel method to determine the link-driving-schedules (LDSs) for the EPA-MOVES tool. Our research developed a hierarchical clustering technique with dynamic time warping similarity measures (HC-DTW) to find the LDS for EPA-MOVES that is capable of producing emission estimates better than the average-speed-based technique with execution time faster than the atomic speed profile approach. We applied the HC-DTW on a sample data from a signalized corridor and found that HC-DTW can significantly reduce computational time without compromising the accuracy. The developed technique in this research can substantially contribute to the EPA-MOVES-based emission estimation process for large-scale urban transportation network by reducing the computational time with reasonably accurate estimates. This method is highly appropriate for transportation networks with higher variation in speed such as signalized intersections. Lastly, experimental results show error difference ranging from 2% to 8% for most pollutants except PM 10.« less

  • WarpEngine, a Flexible Platform for Distributed Computing Implemented in the VEGA Program and Specially Targeted for Virtual Screening Studies.

    PubMed

    Pedretti, Alessandro; Mazzolari, Angelica; Vistoli, Giulio

    2018-05-21

    The manuscript describes WarpEngine, a novel platform implemented within the VEGA ZZ suite of software for performing distributed simulations both in local and wide area networks. Despite being tailored for structure-based virtual screening campaigns, WarpEngine possesses the required flexibility to carry out distributed calculations utilizing various pieces of software, which can be easily encapsulated within this platform without changing their source codes. WarpEngine takes advantages of all cheminformatics features implemented in the VEGA ZZ program as well as of its largely customizable scripting architecture thus allowing an efficient distribution of various time-demanding simulations. To offer an example of the WarpEngine potentials, the manuscript includes a set of virtual screening campaigns based on the ACE data set of the DUD-E collections using PLANTS as the docking application. Benchmarking analyses revealed a satisfactory linearity of the WarpEngine performances, the speed-up values being roughly equal to the number of utilized cores. Again, the computed scalability values emphasized that a vast majority (i.e., >90%) of the performed simulations benefit from the distributed platform presented here. WarpEngine can be freely downloaded along with the VEGA ZZ program at www.vegazz.net .

  • Sours: https://www.science.gov/topicpages/a/alcubierre+warp+drive

    How to Reset Bluetooth Speakers in 2021 [ All Top Brands ]

    Nowadays, Bluetooth speakers are the most common way to jam to your favorite music and enjoy your time. Bluetooth technology has helped a lot in secure connectivity to an extensive range of devices such as smartphones, laptops, iPhones, and tablets. However, as every technology has its pros, it also has cons and not every appliance is 100% efficient. Sometimes, it becomes difficult to pair a Bluetooth speaker to the selected device. Even though almost every Bluetooth speaker comes with a guide, it can be perplexing at times. To help you out with this, I have reviewed some top brand’s Bluetooth speakers and will share how to reset Bluetooth speakers and connect them easily.

    GENERAL BLUETOOTH SPEAKER RESETTING:

    Almost every Bluetooth speaker has similar properties and can be connected to the devices in the same way. To factory reset your speaker, you should follow the following steps:

    1. First of all, check if your speaker is turned on or off.
    2. Make sure that all the previously paired devices are disconnected. In iOS settings, remove the speaker by tapping on the name Bluetooth speaker and then forget the speaker. For android devices, unpair by simply clicking on the name of the device.
    3. To reset the speaker, press and hold the Bluetooth and power button (sometimes it can be interchanged with volume button) at the same time for a couple of seconds, up to 15 seconds. 
    4. This step resets the speaker to factory settings, and the speaker will be ready to pair when turned on.

    Now let’s have a look at individual brand’s speaker settings to reset them properly.

    RESETTING JBL BLUETOOTH SPEAKERS:

    In this I am going to talk through how to reset JBL Bluetooth speakers to factory setting:

    • Turn the JBL speaker on, and you can tell the device is on when the led light turns blue.
    • Simultaneously press and hold the volume up and play buttons until the device turns off.
    • By following these simple steps, you can reset your speaker to the default factory setting.
    • Lastly, press the power button to turn on the device, and it will be in pairing mode.

    RESETTING WONDERBOOM BLUETOOTH SPEAKERS:

    For resetting Wonderboom Bluetooth speakers follow these steps:

    • First, step in to turn the Bluetooth speaker on.
    • The power button is located on the top of most of the Wonderboom speakers, press and hold it for 15 seconds simultaneously with the volume button.
    • After 15 seconds, the speaker will produce a sound that indicates that the device has shut off.
    • Press the power button to switch on the Wonderboom speaker. The led light on the top will start blinking, and the speaker is set to the default setting.

    RESETTING ONYX STUDIO BLUETOOTH SPEAKER:

    These are the steps to reset ONYX Bluetooth speaker to default setting:

    • After turning on the speaker, press the power and volume button at the same time for 5-10 seconds.
    • After some time, the speaker will make a little sound and turn off.
    • Turn on the speaker, and the led light will blink that shows the speaker is in pairing mode, and the speaker is set to default settings.

    RESETTING BEATS BLUETOOTH SPEAKER:

    The procedure for resetting beats Bluetooth speaker is a little different from most other speakers;

    • Beats has a B button on its top.
    • To reset this device, press and hold the power button along with the B button for 10 seconds. 
    • Once you do this, you will see the LED light on the back flash, green and red. It means the device has been reset. 

    RESETTING SONY BLUETOOTH SPEAKERS:

    Like other speakers, the resetting of the Sony Bluetooth speaker is also pretty straightforward.

    • When pressing the power button, turn on the sony speaker.
    • At the back of the Sony SRS-XB22, there is a control unit that has a reset button. 
    • Press the button by using a pin
    • After pressing it, the speaker shuts down, and the device is on the default settings now. Lastly, Sony is offering the best home speakers at a reasonable price as well. So if you’ve got extreme troubles just get a new budget-friendly Bluetooth speaker.

    RESETTING ULTIMATE EARS SPEAKERS:

    The procedure for resetting Ultimate Ears Bluetooth speaker is the same as most other speakers;

    • After turning on the Ultimate Ears Bluetooth speaker, press three buttons at the same time for 10 seconds. 
    • These buttons include a power button on the top, a volume down, and a volume up button. 
    • In this way, the speaker can be reset. Also, check out the excellent speakers under 50 dollars by Ultimate Ears.

    RESETTING PORTRONICS BLUETOOTH SPEAKERS:

    Follow these steps to reset Portronics Bluetooth speakers;

    • To reset Portronics Bluetooth speaker turn on the device
    • There is a flap on the back of the speaker that covers ports and reset button.
    • Press the reset button with the help of a pin and the speaker will turn off
    • On pressing the power button, the speaker will make a sound of ‘Bluetooth mode,’ and the speaker is ready to be paired. 

    RESETTING MPOW BLUETOOTH SPEAKERS:

    The method for resetting Mpow Bluetooth speaker is the same as that of many others;

    • Make sure that the device is turned off.
    • Press and hold the power button with the volume down button at the same time for 5 seconds. 
    • Turn the device on
    • The led light on the speaker will start flashing red and green color that indicates that the speaker is now in Bluetooth mode. 

    RESETTING BOSE BLUETOOTH SPEAKERS:

    To reset the bose, Bluetooth speakers all you have to do is follow these simple steps

    • Like other speakers turn the Bose Bluetooth speaker on
    • Press and hold the power button for 10-12 seconds
    • On doing this, all the LEDs, including aux, battery and Bluetooth led will blink once, and the speaker is on default settings now.
    • Turn the speaker on now and pair it to any device. 

    RESETTING ALTEC BLUETOOTH SPEAKER:

    To reset Altech Bluetooth speaker ( 859 ) follow these steps:

    • Press and hold the three buttons on the right side of the speaker 
    • The speaker will turn off by itself
    • Power on the speaker by pressing the power button, and the speaker is in Bluetooth mode. Also, ALTEC offers budget-friendly options such as top-rated Bluetooth speakers under 20 dollars which you can try without breaking your bank.

    There are certain brands covered in detail, such as how you can reset Sonos Bluetooth speakers as well as resetting Samsung soundbars on Speakers Daily.

    WHY BLUETOOTH CONNECTION FAILS AND HOW CAN WE FIX IT?

    Bluetooth connection or pairing may fail due to some malfunction in hardware or software. The Bluetooth connection can fail due to different reasons and mostly can be fixed easily. The most common causes of Bluetooth failures could be interference, compatibility, and obstructions. Before pairing Bluetooth to devices, check if the two are compatible. 

    To connect the Bluetooth speaker to your desired device, ensure that both of the devices are placed close to each other. Because most Bluetooth devices have a certain range in which it can transmit signals to other connected devices. Even then, if the speaker faces difficulty connecting, check if it has enough battery as some devices have trouble connecting when the battery is running low. Before connecting the speaker to the phone, make sure both devices are discoverable. Go to the phone’s settings and click the Bluetooth option and make it visible, then turn on the speaker and press the Bluetooth button to set it into Bluetooth mode. 

    Another thing that can cause a problem in connecting the Bluetooth is excessive wifi connections or radio signals, as any electronic device can face interference if there are unnecessary and too many signals. Try to remove all the extra signals from the area or change the location of the speaker.  Lastly, if you are looking for cheap alternatives check our guide of best Bluetooth speakers under 30 dollars and you can find something cool without needing to spend too much.

    Related Reset Guide: How to reset Insignia Bluetooth speakers

    Sours: https://speakersdaily.com/how-to-reset-bluetooth-speakers/
    1. Red laser wallpaper
    2. S21 ultra apps
    3. Rod building forums

    Description

    Let's go faster up front! Bubble diagrams can be BIM (Building Information Modeling) savvy. From day one on a new project, designers draw soft dreamy concepts while clients want to know that the numbers pencil out. Believe it or not, long before the model resembles a building, Revit software enables us to deliver both. Let digital practice leader Crispin Mathias+Fisher show you how to capitalize on data in early design phases while staying within the BIM environment. This Revit software-based course is geared toward designers of all experience levels. Generate presentation-ready graphics, easy-on-the-eyes schedules, and lovely design data straight out of Revit. Wait—what's that, you say? Revit can't do pretty? Oh, yes it can! Revit software does pretty and keeps concepts smart.

    Key Learnings

    • Learn how to set up your project browser to incorporate presentation views and sheets
    • Learn how to customize client-facing title blocks that are easy on the eyes, without Illustrator
    • See how presentation graphics can remain soft without being dumb
    • Learn how to capitalize on data in conceptual design
    Sours: https://www.autodesk.com/autodesk-university/class/Vrooooom-Client-Presentations-Warp-Speed-Straight-Revit-Yes-It-Can-Be-Done-2018
    Bluetooth wireless communication

    With wireless communication technology you can do without wires! Bluetooth module will provide you with convenient and fast connection of a Tracer product with with another device, providing stable and efficient communication (e.g. quality, uninterrupted sound) within the range of up to 10 meters.

    Music from the memory card

    Depleted smartphone battery? Relax – you can still play music directly from your memory card, using a built-in slot for such card. The device reads and plays the music automatically.

    Phone call management

    Additional built-in feature that allows you to use the speaker as a handsfree kit. After establishing a BT connection with a smartphone, you can move the telephone conversation and continue it comfortably through the speaker.

    Water tightness class

    IPX is an international standard defining water tightness properties of different products, such as backpacks, speakers, or flashlights.

    The IPX5 water tightness class ensures full protection from water jets flowing from different directions with flow rate of up to 12.5 liters per hour. Products marked with the IPX5 symbol are fit for use in places exposed to water, such as swimming pools or bathrooms. They are perfect for persons interested in tourism or boating (water tightness protecting from rain or splashes of water).

    Sours: https://en.tracer.eu/speakers-tracer-warp-bluetooth-black

    Speaker dg warp

    Turntable Reviews

    The Thales combo, equipped with an EMT TSD 15 N SPH cartridge (the standard-mount version of the TSD 15 pickup head), played Sonny Rollins's "Without a Song," from The Bridge (RCAJapan Victor RCA-6011), like somebody's life depended on it: The music lost not one iota of its bounce in the translation from my Garrard 301-based player to this one. And I was especially pleased that Bob Cranshaw's double bass sounded no less full, and no less snappy, than via my reference player, although the Thales combo lacked the vintage rig's sense of impact.

    But there was more to it than that. In "Without a Song," during his last break before the bass solo, Rollins plays back-to-back triplets that swim against the song's rhythmic stream in a manner I'm unable to describe. The Thales player nailed it, just as well as I'm used to hearing from my Garrard (and few others). And in the comparatively pensive "Where Are You," each one of guitarist Jim Hall's luxuriantly arpeggiated chords was a pure, tactile delight. Tactile goodness also characterized the piano sound on Herbie Hancock's debut album, Takin' Off (Blue Note Cisco 84109), especially Hancock's solo on "Three Bags Full."

    Lately, I've spent a lot of time listening to the Electric Recording Company's reissue of Henriette Faure's recording of Book One of Debussy Preludes for solo piano (EMIERC 350 C 004, footnote 3). Thus, I can say with confidence that the Thales player allowed the piano every bit the same (large) scale as my Garrard-based player and conveyed the same eerie languidity, right down to the last weird, disembodied A at the very end. And the Thales combo wasn't far off the mark in its ability to suggest the instrument's corporeality, al though my Garrard allowed it to sound meatier still. Another good piano recording—by Reinbert De Leeuw, performing early pieces by Erik Satie (Telefunken 6.42198 AW)—sounded similarly good via the Slim II and Simplicity II, with good weight and concomitantly good scale.

    819thales.2

    But there's nothing like Satie's music, with its reliance on slow tempos and richly voiced sustained chords, to show up speed instability of whatever origin—and my copy of that De Leeuw LP has a bit of a warp in it: I'm accustomed to hearing from it a bit of warp-wow. I went back and forth a number of times between the Thales and Garrard-based players, and there was no question that unwanted pitch variations were less severe through the latter, presumably owing to the greater effective length— 307mm vs the Thales's 229mm—of my EMT 997 tonearm. All other things being equal, the longer the tonearm, the less severe the audible effects of warped and off-center records.

    On one of those freewheeling Saturday mornings when I felt like annoying my neighbor—the one who plants things on my lawn and whose dog is bigger and even barkier than mine—I rooted around for the perfect loud Neil Young song to blast and hit upon the live version of "Ohio" from Journey Through the Past (2 LPs, Reprise 2XS 6480), performed by Crosby, Stills, Nash & Young with Calvin Samuels on bass and Johnny Barbata on drums. On this track, which segues brilliantly from the last note of a live performance of Steve Stills's "Find the Cost of Freedom" (both songs are in D, played with drop-D tuning on the guitars), Stills and Young both play big, hollow-body Gretsch guitars that seem forever on the verge of feedback—a sound I adore: they scream with thick, sustainy notes that complement the very emotional vocal performances. On the Thales, that all came across as well as I've ever heard, along with a fantastically impactful, resonant sound from drummer Johnny Barbata's ride toms. It was a satisfying and altogether moving experience. No one called the cops.

    One of my two favorite versions of the Bruckner Symphony No.8 is the one recorded in 1964 by Eugen Jochum and the Berlin Philharmonic (2 LPs, Deutsche Grammophon 138 91819); my copy is an early tulip pressing, and it sounded thrilling on the Thales. The Wagner tubas in the first movement sounded especially real—at the other end of the dynamic spectrum, so did the very delicate harp playing in the scherzo and the adagio. The Thales combo seemed to do the best it could with DG's less-than-lushly-textured string sound, but it was the equal of my Garrard in scale.

    My only criticism was that the Thales player didn't equal my reference in its ability to shrug off surface noise. (What is it with DG records from just about any era Is it my bad luck, or were their records less durable than average?)

    Listening to the Thorens TD 124Simplicity II combination
    Though it may strike some as faint praise, the first thing that impressed me about the sound of the Thales arm on my vintage Thorens was that it maintained my system's core musical strengths: Lines of notes moved in time with realistic momentum and flow, and neither musical timing nor pitch relationships became the least bit ponderous or unclear—high praise, indeed, considering that I've been spoiled by such musically accomplished arms as the Schick, the GrooveMaster II, Sorane ZA-12 and SA-1.2, and, of course, the EMT 997. The scale that opens Maazel and the Vienna Philharmonic's Sibelius Symphony No.4 (Decca SXL 6236) was as spellbinding as ever. In the chords that open Mendelssohn's Overture to A Midsummer Night's Dream, by Peter Maag and the LSO (DeccaSpeakers Corner SXL 2060), the harmonies between the notes played by the flutes and, ultimately, the oboes, clarinets, bassoons, and horn, sounded true, not sour. And the moderate swing tempo of Frank Sinatra's "Oh, You Crazy Moon," from Moonlight Sinatra (Reprise FS-1018), was propelled by relentless rhythm guitar and drum kit, sufficiently steady that Sinatra's own timing shifts dazzled rather than annoyed.

    819thales.3

    Among the other records I tried was a long-time favorite: 1979's Manzanita, by the Tony Rice Unit (Rounder 0092). Apart from his groundbreaking lead work, guitarist Rice is celebrated by fellow musicians for his no-less-accomplished rhythm playing, characterized by a unique combination of fluidity and hard-charging momentum. The Thorens-Thales combination perfectly captured that sound—in both Rice's playing and its real-time influence on the other musicians in the ensemble—on "Blue Railroad Train" and others. No less delightful was the way this combination reproduced the tautly sustained notes from Todd Phillips' double bass on "Midnight on the Stormy Deep" and highlighted the stylistic differences between David Grisman and Sam Bush's mandolin playing throughout the album.

    Conclusions
    In the sense that I'm accustomed to thinking that the ultimate in involving playback is the sole province of high-torque idler-drive turntables and transcription-length tonearms—and of phono setups that require hours of painstaking tonearm and pickup alignment—the combination of TTT-Slim II turntable and Simplicity II tonearm was a surprise, and a very pleasant one. While it never delivered the sheer impact I continue to associate with old-style low-compliance pickup heads, both stereo and mono, it consistently played music in a way that captured and held my attention and brought out most of the things I love about my favorite records.

    I admit coming away from this review thinking of the Thales tonearm as the star of the show: Just as the above-mentioned Sorane tonearms transformed my lovely old Thorens TD 124 into a drivemeister of a player that all but rivaled my Garrard 301's ability to communicate music's sheer physicality, the Thales Simplicity II enhanced its ability to play lines with musical clarity and nearly hypnotic momentum and flow: playback that was just as involving, but in a slightly different way. And it must be said: The Thales Simplicity II is nothing less than the most well-made tonearm I've ever used.

    While the Thales products aren't cheap, they betray a level of craftsmanship that's hard to find in any consumer product—that and an engineering approach that's as conservative as it is original: What else can you say about a designer who, unlike so many competitors, can make a turntable this good without having to make it grotesquely, uselessly big?

    Especially for the user who prefers standard-mount cartridges over old-style pickup heads—a group that surely includes the vast majority of phonophiles—the Thales player, and especially the Thales tonearm, absolutely must be given serious consideration by anyone whose budget can stretch this far.


    Footnote 3: Actually Ducretet Thomson but relabeled for the reissue owing to international copyright restrictions.
    Sours: https://www.stereophile.com/content/hifiction-thales-ttt-slim-ii-turntable-simplicity-ii-tonearm-page-2
    WARP BROTHERS - MEGAMIX

    For a long time, so passionately. so warm, so soft. And then she buried herself in my chest and said that she had never kissed before, and decided to show courage, well. I say to her: - Yes, youre good for me. She looked strangely.

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    His laugh was warm Gallic. And I miss you too, Mon amour (from French my love), he consoled me. But tomorrow you will be home. We will spend a couple of days together before I leave for Brussels, and trust me Adrianna, I intend to make the most of them.



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