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Higuera Rubio, Liza Adriana. „Neira, E. (2020). Streaming wars. La nueva televisión“. Revista de Comunicación 20, Nr. 2 (15.09.2021): 393–94. http://dx.doi.org/10.26441/rc20.2-2021-r2.
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El sector del entretenimiento que estuvo basado en el uso de la televisión como el eje de la vida cotidiana de las familias en entornos gregarios, se ha trasladado a la elección individual y al hiperconsumo desde las plataformas con contenidos, cuya diversidad crea estímulos constantes en un escenario de ubicuidad e hiperconexión. “Streaming wars. La nueva Televisión” es un libro escrito por Elena Neira, que aborda conceptualmente la evolución, presente y futuro del streaming de cara al cambio de paradigma, las transformaciones, las transiciones y las crisis que han revolucionado la industria cultural del cine y la televisión.
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Ellis, Katie, Mike Kent, Kathryn Locke und Ceridwen Clocherty. „Access for everyone? Australia’s ‘streaming wars’ and consumers with disabilities“. Continuum 31, Nr. 6 (04.09.2017): 881–91. http://dx.doi.org/10.1080/10304312.2017.1370076.
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Barannik, Vladimir, Bogdan Gorodetsky und Natalia Barannik. „STEGANOGRAPHY – THEORY AND PRACTICE“. Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 9, Nr. 1 (03.03.2019): 45–48. http://dx.doi.org/10.5604/01.3001.0013.0910.
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Analysis of modern interstate conflicts, trends in the development of forms of warfare. It is shown that confrontation is characterized by various forms, is hidden in nature and is carried out mainly in the political, economic, informational and other spheres. It is proved that a significant part of hybrid wars are information operations used for the destructive impact on society, commercial activities, politics and economics using information and communication space and technologies. The article expresses the need to create a theoretical basis for combating cyber attacks in special telecommunication systems as an integral part of the national security of the state. The development of methods for hiding information as well as providing information during video streaming and images in networks is underway. The basic calculations are given at the initial stages of information hiding and methods for ensuring the latent transfer of data in telecommunication systems.
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Slater, Benjamin Alexander. „Back to the Future“. IMOVICCON Conference Proceeding 2, Nr. 1 (06.07.2021): 1–6. http://dx.doi.org/10.37312/imoviccon.v2i1.73.
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When speculating about the state of moving image in 2021, it might be instructive to explore the ‘pre-history’ of the current streaming era – and therefore this paper will initially focus on a particular cultural/historical moment, the year 2000 (and the very early 2000s); the start of a new millennium and the peak of the ‘dot com era’. This period was characterized by a huge burst of creative and technological energy related to moving image on the web, manifested in the emergence of specialised web portals such as Atomfilms, Shockwave, Heavy, Brickflims; independent creators such as Evan Mather and hi.res; a global plethora of Fanfilms (particularly based around Star Wars); as well as digital moving image festivals such as One Dot Zero (UK) and Res.Fest (US), which purported to be a window into the future, or at least the ‘bleeding edge’ of new media aesthetics intersecting with cinema. In this pre-Broadband and pre-YouTube period, the web was a ‘clunky’ and unreliable platform for a variety of technically complicated moving image files. However, it is possible to look back on the early 2000s as a liminal moment between the celluloid/video/physical media era and our remotely hosted, high-definition present. This paper will describe it as a fertile and open space, where artists and curators had the opportunity to dream of what the future might become, grappling with how moving image on the web (and their narrative language and aesthetics) could be envisioned differently from what had come before. If the Internet was a ‘site’, what types of moving image work could be ‘site-specific’? The paper will offer up key examples from that period and then jump forward in time to apply a similar framework of speculation to moving image online in the year 2021, and in the latter stages will explore what if any radical new ways of storytelling might arise as we move forward into an uncertain ‘future’.
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Dey, M., U. N. Das, K. S. Goswami und S. Bujarbarua. „Effect of warm beam electrons on electrostatic-shock solutions“. Journal of Plasma Physics 48, Nr. 1 (August 1992): 159–66. http://dx.doi.org/10.1017/s0022377800016445.
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We use a one-dimensional quasi-neutral fluid model to study the formation of an electrostatic shock associated with the lower-hybrid mode propagating almost perpendicularly to the magnetic field that exists in the auroral zone of the magnetosphere containing cold downward-streaming electrons, cold upward-streaming ions and beam electrons. We examine the effects of finite electron-beam temperature by describing the beam electrons with fluid equations. We then show how exact time-stationary shock solutions may be found when quasi-neutrality is considered.
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Zhi, Xi Hu, und Ai Di Zhi. „Coordination Algorithm Design of the Load Sharing Proxy Servers for Streaming Media“. Applied Mechanics and Materials 344 (Juli 2013): 265–69. http://dx.doi.org/10.4028/www.scientific.net/amm.344.265.
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With the rapid development of streaming media applications, clustered streaming media proxy servers have become the mainstream of high-end streaming media proxy. To increase the IO throughput capacity of streaming media proxy servers, the most effective method is middle-ware technology in which several servers are bridged together to form a proxy cache server cluster, and the key is the coordination of individual proxy servers. The decision problem of the user request dispatch actually belongs to NP-complete. This article proposes an online coordination algorithm for the load sharing streaming media proxy servers, and discusses the relative deviation of the online algorithm from the optimal solution, to serve as a reference to the specific applications of clustered streaming media proxy servers.
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ROSENBERG, M. „On ion-dust streaming instability in a collisional magnetized plasma with warm dust“. Journal of Plasma Physics 77, Nr. 2 (26.02.2010): 265–70. http://dx.doi.org/10.1017/s0022377810000048.
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AbstractThis brief communication discusses theoretically a resistive ion-dust streaming instability in a collisional dusty plasma, where the ions and electrons are magnetized, and the dust is unmagnetized. The instability is driven by ions streaming along the magnetic field. The emphasis is on the case where the dust has large thermal speed, and where the ion drift speed is ≲ the ion thermal speed. Application to possible laboratory experimental parameters is considered.
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Nekrasov, A. K. „Compressible streaming instabilities of warm multicomponent collisional magnetized astrophysical disks“. Physics of Plasmas 15, Nr. 3 (März 2008): 032907. http://dx.doi.org/10.1063/1.2894561.
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Ward, Tim. „Streamline Your Cell Line Screening: With the Automated, Microscale, Stirred Tank, Single-Use Bioreactor“. BioProcessing Journal 13, Nr. 4 (16.01.2015): 60–61. http://dx.doi.org/10.12665/j134.ward.
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CHO, Y. M., und Y. Y. KEUM. „DILATONIC DARK MATTER — A NEW PARADIGM“. Modern Physics Letters A 13, Nr. 02 (20.01.1998): 109–17. http://dx.doi.org/10.1142/s0217732398000152.
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We study the possibility that the dilaton plays the role of the dark matter of the universe. We find that the condition for the dilaton to be the dark matter of the universe strongly restricts its mass to be around 0.5 keV or 270 MeV. For the other mass ranges, the dilaton either undercloses or overcloses the universe. The 0.5 keV dilaton has the free-streaming distance of about 1.4 Mpc and becomes and excellent candidate of a warm dark matter, while the 270 MeV one has the free-streaming distance of about 7.4 pc and becomes a cold dark matter. We discuss the possible ways to detect the dilaton experimentally.
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Hoeneisen, Bruce. „Simulations and Measurements of Warm Dark Matter Free-Streaming and Mass“. International Journal of Astronomy and Astrophysics 09, Nr. 04 (2019): 368–92. http://dx.doi.org/10.4236/ijaa.2019.94026.
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Verheest, Frank, und B. Buti. „Parallel solitary Alfvén waves in warm multi-species beam-plasma systems. Part 1“. Journal of Plasma Physics 47, Nr. 1 (Februar 1992): 15–24. http://dx.doi.org/10.1017/s0022377800024041.
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A self-consistent reductive perturbation analysis for parallel-propagating magnetohydrodynamic waves in warm multi-species plasmas, in which different constituents can have differing equilibrium drifts, leads to a derivative nonlinear Schrödinger equation for the wave magnetic field. Soliton solutions are discussed, including applications to plasmas with two ion species. Such solitons are larger (in amplitude) and wider than in the non-streaming and/or cold-plasma case, other parameters being equal.
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Mill, Tobias, Shefali Parikh, Archie Allen, Gemma Dart, Daniel Lee, Charlotte Richardson, Keith Howell und Andrew Lewington. „Live streaming ward rounds using wearable technology to teach medical students: a pilot study“. BMJ Simulation and Technology Enhanced Learning 7, Nr. 6 (25.05.2021): 494–500. http://dx.doi.org/10.1136/bmjstel-2021-000864.
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BackgroundThe COVID-19 pandemic resulted in a loss of clinical clerkship opportunities for medical students. To address this problem while maintaining patient safety, this pilot study explored the feasibility of using a wearable headset to live stream teaching ward rounds to remotely based medical students.MethodsThree live streamed teaching ward rounds were delivered to three groups of medical students (n=53) using the Microsoft HoloLens 2 device and Microsoft Teams software, and results pooled for analysis. Feedback was gathered from students and instructors using the evaluation of technology-enhanced learning materials (ETELM). Patient feedback was gathered using the Communication Assessment Tool to explore any impact on interpersonal communication.ResultsThe response rate for the ETELM-learner perceptions was 58% (31/53), 100% for the ETELM-instructor perceptions. Students strongly agreed that the overall quality of the teaching session and instructors was excellent. However, 32% experienced issues with audio or video quality and one remote student reported cyber sickness. The statement ‘educational activities encouraged engagement with session materials/content’ returned the most varied response. Instructors reported technological problems with delivery while using the HoloLens 2 device and environmental noise in the ward was a disruptive factor. Preparation and skilled facilitation were key to delivering a high-quality teaching session. Patients reacted generally favourably to the technology and no negative effects on interpersonal communication were identified.ConclusionThe experience of live streamed ward rounds was well received by patients, medical students and teaching faculty. However, there remain limitations to the routine use of HoloLens 2 technology in our setting including steep learning curves, hardware costs and environmental factors such as noise and WiFi connectivity. Live streamed ward rounds have potential postpandemic implications for the judicious use of resources, and the possibility for few educationally minded clinicians to teach at scale in a patient-friendly manner.
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Gilman, Daniel, Simon Birrer, Anna Nierenberg, Tommaso Treu, Xiaolong Du und Andrew Benson. „Warm dark matter chills out: constraints on the halo mass function and the free-streaming length of dark matter with eight quadruple-image strong gravitational lenses“. Monthly Notices of the Royal Astronomical Society 491, Nr. 4 (11.12.2019): 6077–101. http://dx.doi.org/10.1093/mnras/stz3480.
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ABSTRACT The free-streaming length of dark matter depends on fundamental dark matter physics, and determines the abundance and concentration of dark matter haloes on sub-galactic scales. Using the image positions and flux ratios from eight quadruply imaged quasars, we constrain the free-streaming length of dark matter and the amplitude of the subhalo mass function (SHMF). We model both main deflector subhaloes and haloes along the line of sight, and account for warm dark matter free-streaming effects on the mass function and mass–concentration relation. By calibrating the scaling of the SHMF with host halo mass and redshift using a suite of simulated haloes, we infer a global normalization for the SHMF. We account for finite-size background sources, and marginalize over the mass profile of the main deflector. Parametrizing dark matter free-streaming through the half-mode mass mhm, we constrain the thermal relic particle mass mDM corresponding to mhm. At $95 \, {\rm per\, cent}$ CI: mhm < 107.8 M⊙ ($m_{\rm {DM}} \gt 5.2 \ \rm {keV}$). We disfavour $m_{\rm {DM}} = 4.0 \,\rm {keV}$ and $m_{\rm {DM}} = 3.0 \,\rm {keV}$ with likelihood ratios of 7:1 and 30:1, respectively, relative to the peak of the posterior distribution. Assuming cold dark matter, we constrain the projected mass in substructure between 106 and 109 M⊙ near lensed images. At $68 \, {\rm per\, cent}$ CI, we infer $2.0{-}6.1 \times 10^{7}\, {{\rm M}_{\odot }}\,\rm {kpc^{-2}}$, corresponding to mean projected mass fraction $\bar{f}_{\rm {sub}} = 0.035_{-0.017}^{+0.021}$. At $95 \, {\rm per\, cent}$ CI, we obtain a lower bound on the projected mass of $0.6 \times 10^{7} \,{{\rm M}_{\odot }}\,\rm {kpc^{-2}}$, corresponding to $\bar{f}_{\rm {sub}} \gt 0.005$. These results agree with the predictions of cold dark matter.
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Ghabra, Karim, Molla Imaduddin Ahmed, Katharine McDevitt und Afraa Al-Sabbagh. „Streamlining the process of Newborn and Infant Physical Examination (NIPE)“. Archives of disease in childhood - Education & practice edition 104, Nr. 5 (31.07.2018): 270–71. http://dx.doi.org/10.1136/archdischild-2018-314914.
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Kim, Do-Hyun, und Jong Joon Park. „Design of a Dual-Warp Scheduler for Streaming Multi-Processors Based GP-GPU“. International Journal of Multimedia and Ubiquitous Engineering 9, Nr. 9 (30.09.2016): 59–66. http://dx.doi.org/10.14257/ijmue.2016.11.9.07.
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Mondal, K. K., S. N. Paul und A. Roychowdhury. „Effect of Negative Ions on the Instability of Ion-acoustic Waves in a Relativistic Plasma“. Australian Journal of Physics 50, Nr. 2 (1997): 319. http://dx.doi.org/10.1071/p95100.
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The dispersion relation of an ion-acoustic wave propagating through a collisionless, unmagnetised plasma, having warm isothermal electrons and cold positive and negative ions has been derived. It is seen that the ion-acoustic wave will be unstable in the presence of streaming of ions. Instability of the wave is graphically analysed for the plasma having (H+, O¯) ions, (H+, O2¯) ions, (H+, SF5¯) ions, (He+, Cl¯) ions and (Ar+, O¯) ions with different negative ion concentration and relativistic velocity.
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Kim, Joohwan, Pyarelal Knowles, Josef Spjut, Ben Boudaoud und Morgan Mcguire. „Post-Render Warp with Late Input Sampling Improves Aiming Under High Latency Conditions“. Proceedings of the ACM on Computer Graphics and Interactive Techniques 3, Nr. 2 (26.08.2020): 1–18. http://dx.doi.org/10.1145/3406187.
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End-to-end latency in remote-rendering systems can reduce user task performance. This notably includes aiming tasks on game streaming services, which are presently below the standards of competitive first-person desktop gaming. We evaluate the latency-induced penalty on task completion time in a controlled environment and show that it can be significantly mitigated by adopting and modifying image and simulation-warping techniques from virtual reality, eliminating up to 80% of the penalty from 80 ms of added latency. This has potential to enable remote rendering for esports and increase the effectiveness of remote-rendered content creation and robotic teleoperation. We provide full experimental methodology, analysis, implementation details, and source code.
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Du, Wei, Guo Sen Yuan und Cheng Bin Li. „Research of Die Cavity Warm Extrusion on 3Cr2W8V Steel One-Off Forming Technology“. Advanced Materials Research 418-420 (Dezember 2011): 1270–73. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1270.
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The problems of 3Cr2W8V steel concave die forging production must be solved, such as too many procedures, high cost and mold crack. Through the use of a warm extrusion forming method it could make one-off forming die cavity come true, more practical warm extrusion forming parameters and extrusion die structure parameters were obtained. A suitable lubricant was selected out so that the processed forging die organization was improved and forging streamline distribution was more rational. The service life of forging die increased, and warm extrusion forming technology was applied in the mold production.
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Hulton, N. R. J., und M. J. Mineter. „Modelling self-organization in ice streams“. Annals of Glaciology 30 (2000): 127–36. http://dx.doi.org/10.3189/172756400781820561.
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AbstractThe EISMINT II experiments revealed the tendency for idealized model ice sheets to produce spatially variable flow under certain uniform thermal, mass-balance and topographic boundary conditions. Warm, fast-flowing streams with enhanced creep were separated by zones of colder, slower flow. Similar but different spatial patterns of differentiated flow were produced by all authors. We present further experiments that explore the formation and function of such ice streams at higher modelled resolutions. These are explored by the use of flat, but stochastically rough (10 m amplitude) beds, idealized, parallel-sided model ice sheets and models of finer (12.5 and 5 km) resolutions. Ice streams self-organize irregularly, but with consistent typical spacings which vary with thermal and miss-balance boundary conditions. More radial features are produced at finer scales indicating a dependency on the grid resolution used although this is not linear; at finer resolutions streams occupy increasingly more gridcells. This variation in scale may be related to the finer resolution of the warm/cold streaming/non-streaming boundary. The numerical solution of the thermodynamic ice equation is also highly sensitive to the orthogonality of the model grid. A major deficiency is that the numerical solution appears to fail where the flow is parallel to the grid axes, suggesting that artificial diffusion in the numerical scheme helps to smooth streams lying across the axes directions. The inclusion of sliding produces fewer, more concentrated, flow features, but these also display a level of scale-dependent organization. The spatial arrangement of such streams adjusts in response to the global mass flux of the ice sheet between "warm" and "cold" flow end-member. The results point to a mechanism in which ice sheets respond to climate by altering the large-scale arrangement of their flow patterns.
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MIRON-ALEXE, VIOREL. „MOBILE CARDIAC TELEMETRY SYSTEM FOR ISOLATED IMMUNOSUPPRESSED PATIENTS“. Journal of Science and Arts 21, Nr. 2 (30.06.2021): 597–606. http://dx.doi.org/10.46939/j.sci.arts-21.2-c03.
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This article represents an experiment for a portable open-source ECG monitoring system, purposed for isolated immunosuppressed patients, with heart conditions. At the current stage of development, the proposed experimental MCT (Mobile Cardiac Telemetry) system can be wirelessly used in conjunction with a smart phone and a real-time graph streaming application, through the BLE (Bluetooth Low Energy) module of an IoT embedded platform. At the moment, the system is intended for autonomous low power consumption and short wireless proximity range suited for close monitoring of patients by themselves at home, or by the medical staff in the isolated hospital ward rooms or mobile isolation containters.
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Ruffa, Ilaria, Timothy A. Davis, Isabella Prandoni, Robert A. Laing, Rosita Paladino, Paola Parma, Hans de Ruiter, Viviana Casasola, Martin Bureau und Joshua Warren. „The AGN fuelling/feedback cycle in nearby radio galaxies – II. Kinematics of the molecular gas“. Monthly Notices of the Royal Astronomical Society 489, Nr. 3 (26.08.2019): 3739–57. http://dx.doi.org/10.1093/mnras/stz2368.
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ABSTRACT This is the second paper of a series exploring the multicomponent (stars, warm and cold gas, and radio jets) properties of a sample of 11 nearby low-excitation radio galaxies, with the aim of better understanding the active galactic nuclei (AGN) fuelling/feedback cycle in these objects. Here, we present a study of the molecular gas kinematics of six sample galaxies detected in 12CO(2-1) with the Atacama Large Millimeter/submillimeter Array (ALMA). In all cases, our modelling suggests that the bulk of the gas in the observed (sub-)kpc CO discs is in ordered rotation. Nevertheless, low-level distortions are ubiquitous, indicating that the molecular gas is not fully relaxed into the host galaxy potential. The majority of the discs, however, are only marginally resolved, preventing us from drawing strong conclusions. NGC 3557 and NGC 3100 are special cases. The features observed in the CO velocity curve of NGC 3557 allow us to estimate a supermassive black hole (SMBH) mass of (7.10 ± 0.02) × 108 M⊙, in agreement with expectations from the MSMBH–σ* relation. The rotation pattern of NGC 3100 shows distortions that appear to be consistent with the presence of both a position angle and an inclination warp. Non-negligible radial motions are also found in the plane of the CO disc, likely consistent with streaming motions associated with the spiral pattern found in the inner regions of the disc. The dominant radial motions are likely to be inflows, supporting a scenario in which the cold gas is contributing to the fuelling of the AGN.
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Boyanovsky, Daniel. „Sterile Neutrinos as Dark Matter: Alternative Production Mechanisms in the Early Universe“. Universe 7, Nr. 8 (25.07.2021): 264. http://dx.doi.org/10.3390/universe7080264.
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We study various production mechanisms of sterile neutrinos in the early universe beyond and within the standard model. We obtain the quantum kinetic equations for production and the distribution function of sterile-like neutrinos at freeze-out, from which we obtain free streaming lengths, equations of state and coarse grained phase space densities. In a simple extension beyond the standard model, in which neutrinos are Yukawa coupled to a Higgs-like scalar, we derive and solve the quantum kinetic equation for sterile production and analyze the freeze-out conditions and clustering properties of this dark matter constituent. We argue that in the mass basis, standard model processes that produce active neutrinos also yield sterile-like neutrinos, leading to various possible production channels. Hence, the final distribution function of sterile-like neutrinos is a result of the various kinematically allowed production processes in the early universe. As an explicit example, we consider production of light sterile neutrinos from pion decay after the QCD phase transition, obtaining the quantum kinetic equation and the distribution function at freeze-out. A sterile-like neutrino with a mass in the keV range produced by this process is a suitable warm dark matter candidate with a free-streaming length of the order of few kpc consistent with cores in dwarf galaxies.
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Zuhair, Hiba, Ali Selamat und Ondrej Krejcar. „A Multi-Tier Streaming Analytics Model of 0-Day Ransomware Detection Using Machine Learning“. Applied Sciences 10, Nr. 9 (04.05.2020): 3210. http://dx.doi.org/10.3390/app10093210.
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Desktop and portable platform-based information systems become the most tempting target of crypto and locker ransomware attacks during the last decades. Hence, researchers have developed anti-ransomware tools to assist the Windows platform at thwarting ransomware attacks, protecting the information, preserving the users’ privacy, and securing the inter-related information systems through the Internet. Furthermore, they utilized machine learning to devote useful anti-ransomware tools that detect sophisticated versions. However, such anti-ransomware tools remain sub-optimal in efficacy, partial to analyzing ransomware traits, inactive to learn significant and imbalanced data streams, limited to attributing the versions’ ancestor families, and indecisive about fusing the multi-descent versions. In this paper, we propose a hybrid machine learner model, which is a multi-tiered streaming analytics model that classifies various ransomware versions of 14 families by learning 24 static and dynamic traits. The proposed model classifies ransomware versions to their ancestor families numerally and fuses those of multi-descent families statistically. Thus, it classifies ransomware versions among 40K corpora of ransomware, malware, and good-ware versions through both semi-realistic and realistic environments. The supremacy of this ransomware streaming analytics model among competitive anti-ransomware technologies is proven experimentally and justified critically with the average of 97% classification accuracy, 2.4% mistake rate, and 0.34% miss rate under comparative and realistic test.
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Thiele, Marco R., und Roderick P. Batycky. „Using Streamline-Derived Injection Efficiencies for Improved Waterflood Management“. SPE Reservoir Evaluation & Engineering 9, Nr. 02 (01.04.2006): 187–96. http://dx.doi.org/10.2118/84080-pa.
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Summary This paper describes a novel approach to predict injection- and production-well rate targets for improved management of waterfloods. The methodology centers on the unique ability of streamlines to define dynamic well allocation factors (WAFs) between injection and production wells. Streamlines allow well allocation factors to be broken down additionally into phase rates at either end of each injector/producer pair. Armed with these unique data, it is possible to define the injection efficiency (IE) for each injector and for injector/producer pairs in a simulation model. The IE quantifies how much oil can be recovered at a producing well for every unit of water injected by an offset injector connected to it. Because WAFs are derived directly from streamlines, the data reflect all the complexities impacting the dynamic behavior of the reservoir model, including the spatial permeability and porosity distributions, fault locations, the underlying computational grid, relative permeability data, pressure/volume/temperature (PVT) properties, and most importantly, historical well rates. The possibility to define IEs through streamline simulation stands in contrast to the ad hoc definition of geometric WAFs and simple surveillance methods used by many practicing reservoir engineers today. Once IEs are known, improved waterflood management can be implemented by reallocating injection water from low-efficiency to high-efficiency injectors. Even in the case in which water cannot be reallocated because of local surface-facility constraints, knowing IEs on an injector/producer pair allows the setting of target rates to maintain oil production while reducing water production. We demonstrate this methodology by first introducing the concept of IEs, then use a small reservoir as an example application. Introduction Local areas of water cycling and poor sweep exist as a flood matures. Current flood management is restricted to surveillance methods or workflows centered on finite-difference (FD) simulation, where areas of bypassed oil are identified and then rate changes, producer/injector conversions, or infill-drilling scenarios are tested. However, identifying and testing improved management scenarios in this way can be laborious, particularly for waterfloods with a large number of wells and/or a relatively high-resolution numerical grid. For mature fields that have potential for improved production without introducing new wells or producer/injector conversions, the main goal is to manage well rates so as to reduce cycling of the injected fluid while maintaining or even increasing oil production. Reservoir engineers have no easy or automated way to identify injection patterns, well-pair connections, or areas of inefficiency beyond simple standard fixed-pattern surveillance techniques (Baker 1997; Baker 1998; Batycky et al. 2005). Such methods are approximate at best owing to the need to define geometric allocation factors and fixed patterns, which suffer from "out-of-pattern" flow. These limitations are removed through streamline-based surveillance models (Batycky et al. 2005). By adding a transport step along streamlines, streamline simulation (3DSL 2006) can additionally identify how much oil production results from an associated injector, quantifying the efficiency down to an individual injector/producer pair. It is this crucial piece of information—the efficiency of an injector/producer pair—that allows an improved estimation of future target rates, leading to improved reservoir flood management.
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Rudakovskyi, Anton, Andrei Mesinger, Denys Savchenko und Nicolas Gillet. „Constraints on warm dark matter from UV luminosity functions of high-z galaxies with Bayesian model comparison“. Monthly Notices of the Royal Astronomical Society 507, Nr. 2 (13.08.2021): 3046–56. http://dx.doi.org/10.1093/mnras/stab2333.
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ABSTRACT The number density of small dark matter (DM) haloes hosting faint high-redshift galaxies is sensitive to the DM free-streaming properties. However, constraining these DM properties is complicated by degeneracies with the uncertain baryonic physics governing star formation. In this work, we use a flexible astrophysical model and a Bayesian inference framework to analyse ultraviolet (UV) luminosity functions (LFs) at z = 6–8. We vary the complexity of the astrophysical galaxy model (single versus double power law for the stellar – halo mass relation) as well as the matter power spectrum [cold DM versus thermal relic warm DM (WDM)], comparing their Bayesian evidences. Adopting a conservatively wide prior range for the WDM particle mass, we show that the UV LFs at z = 6–8 only weakly favour cold DM over WDM. We find that particle masses of ≲ 2 keV are rejected at a 95 per cent credible level in all models that have a WDM-like power spectrum cutoff. This bound should increase to ∼2.5 keV with the James Webb Space Telescope (JWST).
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Ji, Suoqing, T. K. Chan, Cameron B. Hummels, Philip F. Hopkins, Jonathan Stern, Dušan Kereš, Eliot Quataert, Claude-André Faucher-Giguère und Norman Murray. „Properties of the circumgalactic medium in cosmic ray-dominated galaxy haloes“. Monthly Notices of the Royal Astronomical Society 496, Nr. 4 (26.06.2020): 4221–38. http://dx.doi.org/10.1093/mnras/staa1849.
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ABSTRACT We investigate the impact of cosmic rays (CRs) on the circumgalactic medium (CGM) in FIRE-2 simulations, for ultra-faint dwarf through Milky Way (MW)-mass haloes hosting star-forming (SF) galaxies. Our CR treatment includes injection by supernovae, anisotropic streaming and diffusion along magnetic field lines, and collisional and streaming losses, with constant parallel diffusivity $\kappa \sim 3\times 10^{29}\, \mathrm{cm^2\ s^{-1}}$ chosen to match γ-ray observations. With this, CRs become more important at larger halo masses and lower redshifts, and dominate the pressure in the CGM in MW-mass haloes at z ≲ 1–2. The gas in these ‘CR-dominated’ haloes differs significantly from runs without CRs: the gas is primarily cool (a few ${\sim}10^{4}\,$ K), and the cool phase is volume-filling and has a thermal pressure below that needed for virial or local thermal pressure balance. Ionization of the ‘low’ and ‘mid’ ions in this diffuse cool gas is dominated by photoionization, with O vi columns ${\gtrsim}10^{14.5}\, \mathrm{cm^{-2}}$ at distances ${\gtrsim}150\, \mathrm{kpc}$. CR and thermal gas pressure are locally anticorrelated, maintaining total pressure balance, and the CGM gas density profile is determined by the balance of CR pressure gradients and gravity. Neglecting CRs, the same haloes are primarily warm/hot ($T\gtrsim 10^{5}\,$K) with thermal pressure balancing gravity, collisional ionization dominates, O vi columns are lower and Ne viii higher, and the cool phase is confined to dense filaments in local thermal pressure equilibrium with the hot phase.
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Clark, Kevin W., Susan Moller und Lauri O'Brien. „Electronic patient journey boards a vital piece of the puzzle in patient flow“. Australian Health Review 38, Nr. 3 (2014): 259. http://dx.doi.org/10.1071/ah13192.
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Objective Internationally, there is growing interest in the applicability of visual management in healthcare, although little is known about the extent of its effectiveness. In the past 5 years technical advances have permitted the integration of all relevant data into a singular display that can improve staff efficiency, accelerate decisions, streamline workflow processes and reduce oversights and errors in clinical practice. The aim of the case study is to describe the features and application of electronic patient journey boards (EPJBs) as an enabler to accelerate patient flow that has been demonstrated and evaluated in Queensland Health hospitals. Methods In 2012 and 2013 we collected ward-specific data that was sourced from the Queensland Hospital Admitted Patient Data Collection, determining the top 10 overnight diagnostic-related groups (DRGs) for each ward participating in the pilots. The Statistical Output Unit within Queensland Health then provided data and analysis on the ALOS for each of these DRGs for the period following an EPJB installation, along with the ALOS for the same DRGs for the corresponding period in the previous year. Results Patient length of stay reduced and display of estimated discharge dates improved with the introduction of EPJBs along with improved communication and information management resulting in time savings from 20 min per staff member per shift to 2.5 h per ward a day. Conclusion Queensland and South Australian Health systems have succeeded in ‘making the hospital patient journey visible’ through an innovative combination of information management and prominent display of key information related to patient care portrayed on large liquid crystal display (LCD) screens in hospital wards. What is known about the topic? No published studies have explored health services developing, piloting and evaluating Electronic Patient Journey Boards in a variety of clinical settings. What does this paper add? Until recently, paper-based health records and scheduled meetings were the only way for healthcare staff to communicate information to one another. In practice, this means that information vital to patient care is infrequently communicated between team members, is recorded in different places and in different ways, and is heavily reliant on care providers seeking out the information they need to perform effectively in their role. What are the implications for practitioners? This paper can be beneficial for managers and decision-makers of all healthcare organisations when considering streamlining a patients’ journey through a hospital with the assistance of visual management tools.
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Horeck, Tanya. „“Netflix and Heal”“. Film Quarterly 75, Nr. 1 (2021): 35–40. http://dx.doi.org/10.1525/fq.2021.75.1.35.
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This article explores how binge-watching shifted from guilty pleasure to essential self-care during the extended lockdown prompted by the COVID-19 pandemic. While binge-watching was prescribed as one of the most effective ways to ward off lockdown ennui, quarantine conditions also led to its reframing as a politically productive activity, one tied to social-justice projects. Following the worldwide outrage over the murder of George Floyd in May 2020, listicles emerged of antiracist films and TV shows for viewers to watch as a means of converting them from unreflective couch potatoes into socially enlightened citizens. While such lists are problematic, COVID culture’s recasting of binge-watching as civic duty compels reflection on how viewing habits in the streaming era might be related to public pedagogy around social-justice struggles. The article concludes by pointing to the continued relevance of binge-watching as a concept that captures the affective intensities of internet TV and user-directed viewing during the pandemic and beyond.
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Vo, Viet Tan, und Cheol Hong Kim. „Architecture exploration of recent GPUs to analyze the efficiency of hardware resources“. Bulletin of Electrical Engineering and Informatics 10, Nr. 2 (01.04.2021): 917–26. http://dx.doi.org/10.11591/eei.v10i2.2736.
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This study analyzes the efficiency of parallel computational applications with the adoption of recent graphics processing units (GPUs). We investigate the impacts of the additional resources of recent architecture on the popular benchmarks compared with previous architecture. Our simulation results demonstrate that Pascal GPU architecture improves the performance by 273% on average compared to old-fashioned Fermi architecture. To evaluate the performance improvement depending on specific hardware resources, we divide the hardware resources into two types: computing and memory resources. Computing resources have bigger impact on performance improvement than memory resources in most of benchmarks. For Hotspot and B+ tree, the architecture adopting only enhanced computing resources can achieve similar performance gains of the architecture adopting both computing and memory resources. We also evaluate the influence of the number of warp schedulers in the SM (Streaming Multiprocessor) to the GPU performance in relationship with barrier waiting time. Based on these analyses, we propose the development direction for the future generation of GPUs.
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Dredge, Lynda A. „Late Pleistocene and Holocene glaciation and deglaciation of Melville Peninsula, Northern Laurentide Ice Sheet“. Géographie physique et Quaternaire 55, Nr. 2 (21.06.2004): 159–70. http://dx.doi.org/10.7202/008300ar.
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Abstract Melville Peninsula lies within the Foxe/Baffin Sector of the Laurentide Ice Sheet. Pre-Foxe/Pre-Wisconsin ice may have covered the entire peninsula. Preserved regolith in uplands indicates a subsequent weathering interval. Striations and till types indicate that, during the last (Foxe) glaciation, a local ice sheet (Melville Ice) initially developed on plateaus, but was later subsumed by the regional Foxe ice sheet. Ice from the central Foxe dome flowed across northern areas and Rae Isthmus, while ice from a subsidiary divide controlled flow on southern uplands. Ice remained cold-based and non-erosive on some plateaus, but changed from cold- to warm-based under other parts of the subsidiary ice divide, and was warm-based elsewhere. Ice streaming, generating carbonate till plumes, was prevalent during deglaciation. A late, quartzite-bearing southwestward ice flow from Baffin Island crossed onto the north coast. A marine incursion began in Committee Bay about 14 ka and advanced southwards to Wales Island by 8.6 ka. The marine-based ice centre in Foxe Basin broke up about 6.9 ka. Northern Melville Peninsula and Rae Isthmus were deglaciated rapidly, but remnant ice caps remained active and advanced into some areas. The ice caps began to retreat from coastal areas ~6.4 to 6.1 ka, by which time sea level had fallen from 150-180 m to 100 m.
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Cornuault, Nicolas, Matthew D. Lehnert, François Boulanger und Pierre Guillard. „Are cosmological gas accretion streams multiphase and turbulent?“ Astronomy & Astrophysics 610 (Februar 2018): A75. http://dx.doi.org/10.1051/0004-6361/201629229.
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Simulations of cosmological filamentary accretion reveal flows (“streams”) of warm gas, T ~ 104 K, which bring gas into galaxies efficiently. We present a phenomenological scenario in which gas in such flows, if it is shocked as it enters the halo as we assume and depending on the post-shock temperature, stream radius, its relative overdensity, and other factors, becomes biphasic and turbulent. We consider a collimated stream of warm gas that flows into a halo from an overdense filament of the cosmic web. The post-shock streaming gas expands because it has a higher pressure than the ambient halo gas and fragments as it cools. The fragmented stream forms a two phase medium: a warm cloudy phase embedded in hot post-shock gas. We argue that the hot phase sustains the accretion shock. During fragmentation, a fraction of the initial kinetic energy of the infalling gas is converted into turbulence among and within the warm clouds. The thermodynamic evolution of the post-shock gas is largely determined by the relative timescales of several processes. These competing timescales characterize the cooling, expansion of the post-shock gas, amount of turbulence in the clouds, and dynamical time of the halo. We expect the gas to become multiphase when the gas cooling and dynamical times are of the same order of magnitude. In this framework, we show that this mainly occurs in the mass range, Mhalo ~ 1011 to 1013 M⊙, where the bulk of stars have formed in galaxies. Because of the expansion of the stream and turbulence, gas accreting along cosmic web filaments may eventually lose coherence and mix with the ambient halo gas. Through both the phase separation and “disruption” of the stream, the accretion efficiency onto a galaxy in a halo dynamical time is lowered. Decollimating flows make the direct interaction between galaxy feedback and accretion streams more likely, thereby further reducing the overall accretion efficiency. As we discuss in this work, moderating the gas accretion efficiency through these mechanisms may help to alleviate a number of significant challenges in theoretical galaxy formation.
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Paul, I., G. Pakira, S. K. Chattopadhyay, S. N. Paul und B. Ghosh. „Analytical study on the existence of ion-acoustic solitary waves in a plasma consisting of warm streaming ions and nonthermal electrons“. Indian Journal of Physics 86, Nr. 5 (21.04.2012): 395–400. http://dx.doi.org/10.1007/s12648-012-0045-y.
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Miyamoto, Masanori. „Is the Vorticity Vector of the Galaxy Perpendicular to the Galactic Plane?“ Symposium - International Astronomical Union 156 (1993): 219–30. http://dx.doi.org/10.1017/s0074180900173255.
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The modern astrometric catalogue ACRS invites attempts to re-examine the systematic stellar motions, together with the luni-solar precessional correction and the fictitious equinoctial motion correction to the FK5 system, and gives encouraging results.On the basis of the three-dimensional Ogorodnikov-Milne model for the overall pattern analysis of the proper motions, the systematic stellar velocity field of about 30000 K-M giants chosen from the ACRS is first examined in the heliocentric distance interval 0.5 to 1.0 kpc. We have found in an iterative fashion a solution for the K-M giants that yields neither deformation-nor vorticity-field other than the classical ones (the Oort constants A and B). The important point to note here is that the generally accepted idea such that the K-M giants are a steady-state constituent of the galaxy is compatible with the luni-solar precessional correction proposed by the VLBI and LLR observations. The K-M giants give the rational set of corrections to the FK5 system: the luni-solar precessional correction Δp = −0″.27 ± 0″.03 / cent and the equinoctial motion correction including the planetary precessional correction Δe + Δλ = −0″.12 ± 0″.03 / cent. Thus, the precessional correction previously proposed with the modern techniques has been confirmed by the pattern analysis of the proper motions.Next, applying the corrections obtained above, we have performed the overall pattern analysis of the proper motions of about 3000 O-B5 stars, supergiants, and bright giants, which are chosen again from the ACRS, and considered as an entity of the galactic warp. It is found that the kinematics of these stars is quite different from that of K-M giants. These stars show additional shears and rotations around two mutually orthogonal axes lying in the galactic plane, besides the classical ones. The present finding implies that the young stars are streaming around the galactic center in a tilted sheet (the warp) with the velocity of 225 km/s, and the sheet itself is simultaneously rotating around the nodal line of the warp (galactic center — sun — anticenter line) with the angular velocity of 4 km/s/kpc in increasing sense of the present inclination of the warp.
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Vaisman, Alon, und Robert Wu. „Analysis of Smartphone Interruptions on Academic General Internal Medicine Wards“. Applied Clinical Informatics 26, Nr. 01 (2017): 01–11. http://dx.doi.org/10.4338/aci-2016-08-ra-0130.
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SummaryIntroduction: Hospital-based medical services are increasingly utilizing team-based pagers and smartphones to streamline communications. However, an unintended consequence may be higher volumes of interruptions potentially leading to medical error. There is likely a level at which interruptions are excessive and cause a ‘crisis mode’ climate.Methods: We retrospectively collected phone, text messaging, and email interruptions directed to hospital-assigned smartphones on eight General Internal Medicine (GIM) teams at two tertiary care centres in Toronto, Ontario from April 2013 to September 2014. We also calculated the number of times these interruptions exceeded a pre-specified threshold per hour, termed ‘crisis mode’, defined as at least five interruptions in 30 minutes. We analyzed the correlation between interruptions and date, site, and patient volumes.Results: A total of 187,049 interruptions were collected over an 18-month period. Daily weekday interruptions rose sharply in the morning, peaking between 11 AM to 12 PM and measuring 4.8 and 3.7 mean interruptions/hour at each site, respectively. Mean daily interruptions per team totaled 46.2 ± 3.6 at Site 1 and 39.2 ± 4.2 at Site 2. The ‘crisis mode’ threshold was exceeded, on average, 2.3 times/day per GIM team during weekdays. In a multivariable linear regression analysis, site ([uni03B2]6.43 CI95% 5.44 –7.42, p<0.001), day of the week (with Friday having the most interruptions) ([uni03B2]0.481 CI95% 0.236 –0.730, p<0.05) and patient census ([uni03B2]1.55 CI95% 1.42 –1.67, p<0.05) were all predictive of daily interruption volume although there was a significant interaction effect between site and patient census ([uni03B2]-0.941 CI95% -1.18 –-0.703, p<0.05).Conclusion: Interruptions were related to site-specific features, including volume, suggesting that future interventions should target the culture of individual hospitals. Excessive interruptions may have implications for patient safety especially when exceeding a maximal threshold over short periods of time.
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Ladani, Sonal, Mohammed AbouDaya, William Thornhill und Nanna Christiansen. „P26 Pharmacy discharge service to facilitate early discharges and to improve the quality of electronic discharge letters (EDL’s)“. Archives of Disease in Childhood 105, Nr. 9 (19.08.2020): e19.2-e20. http://dx.doi.org/10.1136/archdischild-2020-nppg.35.
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AimThe current discharge process on the paediatric wards involves transcribing medications from one electronic system to another, this has led to errors and compromises patient safety. Discharges are also sometimes delayed due to patients waiting for their medications. The newly implemented discharge service involves pharmacists working closely with the medical team to identify patients for discharge as early as possible and to accurately transcribe medications onto the electronic patient record (EPR).MethodThe pharmacist would attend the consultant-led morning handover or would liaise with the nurse in charge on the ward to establish discharges and transfers for that day or over the weekend if on a Friday. The most urgent discharges and any complex patients were prioritised. The EPR system would be used to generate the EDL’s, transcribe the medicines for discharge and add any other relevant written information. Any medication related issues would be clarified with the medical team. The prescription would be handed over to the medical team to be reviewed and signed. This would then be dispensed and checked by the pharmacy team. The patient/parent or carer would be counselled on their medications. Data was collected from November 2018 – March 2019, this included time informed about discharge, time EDL started, time EDL printed and time EDL completed. Other data collected included if any additional written information was provided to the GP and if any amendments were required after the doctor had reviewed the prescription. The data was inputted into an Excel spreadsheet and was compared against August – October 2018.Results152 discharge prescriptions were included in the service. The data was compared to the data from August – October 2018 which showed more than double of the prescriptions were completed in the morning between 9am-12noon (compared to 12noon-5.30pm) since the service started. Less prescription needed amendments at the point of screening and more prescriptions included additional medication related information. The quality of the prescriptions had improved and completing prescriptions earlier meant timely discharges, improved bed utilisation and improved patient quality. Positive feedback was given by patients, doctors and nurses as well as the rest of the ward teams.ConclusionCommunication has improved between the hospital and community care, as well as patient satisfaction and bed availability. A future development would be to introduce prescribing pharmacists within medical teams to streamline the discharge prescription process further, freeing up medical time and increasing the focus on medicines optimisation for all patients.
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Strub, Emmanuelle. „The Duties of an NGO Security Advisor“. Journal of Humanitarian Affairs 1, Nr. 2 (01.05.2019): 32–37. http://dx.doi.org/10.7227/jha.015.
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Abstract A security advisor for Médecins du Monde France between 2012 and 2016, Emmanuelle Strub recalls her experience and some of the major shifts in risk management in the NGO sector in recent years. In particular, at a time of global normalisation of the aid sector, she describes her own efforts to streamline security management in her organisation: empowering field teams and, in particular, heads of mission, emphasising the crucial role of obtaining consent from the various stakeholders in the countries of intervention, and developing security trainings, crisis-management tools and a risk-management methodology. Yet, she warns, the trend today, with the advent of the duty-of-care concept, is to shift the use of risk management from enabling operations and facilitating access to populations to protecting the organisation from legal or reputational risks.
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Tripathy, Devashree, Amirali Abdolrashidi, Laxmi Narayan Bhuyan, Liang Zhou und Daniel Wong. „PAVER“. ACM Transactions on Architecture and Code Optimization 18, Nr. 3 (Juni 2021): 1–26. http://dx.doi.org/10.1145/3451164.
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The massive parallelism present in GPUs comes at the cost of reduced L1 and L2 cache sizes per thread, leading to serious cache contention problems such as thrashing. Hence, the data access locality of an application should be considered during thread scheduling to improve execution time and energy consumption. Recent works have tried to use the locality behavior of regular and structured applications in thread scheduling, but the difficult case of irregular and unstructured parallel applications remains to be explored. We present PAVER , a P riority- A ware V ertex schedul ER , which takes a graph-theoretic approach toward thread scheduling. We analyze the cache locality behavior among thread blocks ( TBs ) through a just-in-time compilation, and represent the problem using a graph representing the TBs and the locality among them. This graph is then partitioned to TB groups that display maximum data sharing, which are then assigned to the same streaming multiprocessor by the locality-aware TB scheduler. Through exhaustive simulation in Fermi, Pascal, and Volta architectures using a number of scheduling techniques, we show that PAVER reduces L2 accesses by 43.3%, 48.5%, and 40.21% and increases the average performance benefit by 29%, 49.1%, and 41.2% for the benchmarks with high inter-TB locality.
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Gilman, Daniel, Simon Birrer, Tommaso Treu, Anna Nierenberg und Andrew Benson. „Probing dark matter structure down to 107 solar masses: flux ratio statistics in gravitational lenses with line-of-sight haloes“. Monthly Notices of the Royal Astronomical Society 487, Nr. 4 (19.06.2019): 5721–38. http://dx.doi.org/10.1093/mnras/stz1593.
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Abstract Strong lensing provides a powerful means of investigating the nature of dark matter as it probes dark matter structure on sub-galactic scales. We present an extension of a forward modelling framework that uses flux ratios from quadruply imaged quasars (quads) to measure the shape and amplitude of the halo mass function, including line-of-sight (LOS) haloes and main deflector subhaloes. We apply this machinery to 50 mock lenses – roughly the number of known quads – with warm dark matter (WDM) mass functions exhibiting free-streaming cut-offs parametrized by the half-mode mass mhm. Assuming cold dark matter (CDM), we forecast bounds on mhm and the corresponding thermal relic particle masses over a range of tidal destruction severity, assuming a particular WDM mass function and mass–concentration relation. With significant tidal destruction, at 2σ we constrain $m_{\rm {hm}}\lt 10^{7.9} \left(10^{8.4}\right) \, \mathrm{M}_{\odot }$, or a 4.4 (3.1) keV thermal relic, with image flux uncertainties from measurements and lens modelling of $2{{\ \rm per\ cent}} \left(6{{\ \rm per\ cent}}\right)$. With less severe tidal destruction we constrain $m_{\rm {hm}}\lt 10^{7} \left(10^{7.4}\right) \, \mathrm{M}_{\odot }$, or an 8.2 (6.2) keV thermal relic. If dark matter is warm, with $m_{\rm {hm}} = 10^{7.7} \, \mathrm{M}_{\odot }$ (5.1 keV), we would favour WDM with $m_{\rm {hm}} \gt 10^{7.7} \, \mathrm{M}_{\odot }$ over CDM with relative likelihoods of 22:1 and 8:1 with flux uncertainties of $2{{\ \rm per\ cent}}$ and $6{{\ \rm per\ cent}}$, respectively. These bounds improve over those obtained by modelling only main deflector subhaloes because LOS objects produce additional flux perturbations, especially for high-redshift systems. These results indicate that ∼50 quads can conclusively differentiate between WDM and CDM.
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Montelli, Aleksandr, Julian A. Dowdeswell, Anastasiya Pirogova, Yana Terekhina, Mikhail Tokarev, Nikita Rybin, Anton Martyn und Vladislav Khoshtariya. „Deep and extensive meltwater system beneath the former Eurasian Ice Sheet in the Kara Sea“. Geology 48, Nr. 2 (22.11.2019): 179–83. http://dx.doi.org/10.1130/g46968.1.
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Abstract The Eurasian ice sheet extended across the Barents and Kara Seas during the late Quaternary, yet evidence on past ice dynamics and thermal structure across its huge eastern periphery remains largely unknown. Here we use three-dimensional seismic data sets covering ∼4500 km2 of the Kara Sea west of Yamal Peninsula, Siberia (71°–73°N), to identify, for the first time in the Russian Arctic seas, several buried generations of vast subglacial tunnel valley networks. Individual valleys are up to 50 km long and are incised as much as 400 m deep; among the largest tunnel valleys ever reported. This discovery represents the first documentation of an extensively warm-based eastern margin of the Eurasian ice sheet during the Quaternary glaciations. The presence of major subglacial channel networks on the shallow shelf, with no evidence of ice streaming, suggests that significant meltwater discharge and subsequent freshwater forcing of ocean circulation may be long-lived rather than catastrophic, occurring during the latest stages of deglaciation in areas where the ice sheet flows slowly and is grounded largely above sea level. Furthermore, the first account of an extensive hydrological network across large areas of the Kara Sea provides important empirical evidence for active subglacial hydrological processes that should be considered in future numerical modeling of the eastern margin of the Quaternary Eurasian ice sheet.
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Giordano, Paul R., Arielle M. Chaves, Nathaniel A. Mitkowski und Joseph M. Vargas. „Identification, Characterization, and Distribution of Acidovorax avenae subsp. avenae Associated with Creeping Bentgrass Etiolation and Decline“. Plant Disease 96, Nr. 12 (Dezember 2012): 1736–42. http://dx.doi.org/10.1094/pdis-04-12-0377-re.
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Bacterial etiolation and decline caused by Acidovorax avenae subsp. avenae is an emerging disease of creeping bentgrass (Agrostis stolonifera) in and around the transition zone, a unique area of turfgrass culture between cool and warm regions of the United States. It is suspected that the disease has been present for many years, although diagnosis of the first occurrence was not reported until 2010. Solicitation of samples from golf courses in 2010 and 2011 was undertaken to investigate the prevalence and dissemination of Acidovorax avenae subsp. avenae on creeping bentgrass. At least 21 isolates from 13 states associated with these outbreaks on golf courses were confirmed as A. avenae subsp. avenae by pathogenicity assays and 16S rDNA sequence analysis at two independent locations. Pathogenicity testing of bacterial isolates from creeping bentgrass samples exhibiting heavy bacterial streaming confirmed A. avenae subsp. avenae as the only bacterium to cause significant disease symptoms and turfgrass decline. Host range inoculations revealed isolates of A. avenae subsp. avenae to be pathogenic on all Agrostis stolonifera cultivars tested, with slight but significant differences in disease severity on particular cultivars. Other turfgrass hosts tested were only mildly susceptible to Acidovorax avenae subsp. avenae infection. This study initiated research on A. avenae subsp. avenae pathogenicity causing a previously uncharacterized disease of creeping bentgrass putting greens in the United States.
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Siregar, Diana Cahaya, Sulton Kharisma, Bagas Ega Amirul Haq und Regina Dara Ninggar. „Identifikasi Kejadian Kecelakaan Kapal Berbasis Analisis Faktor Cuaca dan Citra Satelit (Studi Kasus Tanggal 18 Juni 2018 di Danau Toba)“. Jurnal Fisika Indonesia 23, Nr. 2 (09.12.2019): 8. http://dx.doi.org/10.22146/jfi.43775.
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KM Sinar Bangun IV was carrying passengers about 188 people and 70 units of vehicles when it sank in Lake Toba, North Sumatra on Monday, June 18, 2018. The incident was occurred due to overcapacity, bad weather condition, and human error. Meteorological analysis on a global, regional and local scales were used to determine atmospheric dynamics at the time of the event. Meanwhile, Satellite, AWS, and ARG data were used to determine the weather condition. Streamline analysis showed the shear line pattern in Sumatra Island and convergence in North Sumatra. The condition of sea surface temperature was warm enough in the range of 28-30 °C. These conditions triggered for the potential of convective clouds development. Himawari-8 satellite images from IR and VIS channels showed the development of convective clouds in Lake Toba right before the event happened. AWS and ARG measurements around the Lake Toba area recorded precipitation which the value was greater than 30 mm/day.
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Rahman, Mizanur, Mhafuzul Islam, Jon Calhoun und Mashrur Chowdhury. „Real-Time Pedestrian Detection Approach with an Efficient Data Communication Bandwidth Strategy“. Transportation Research Record: Journal of the Transportation Research Board 2673, Nr. 6 (07.05.2019): 129–39. http://dx.doi.org/10.1177/0361198119843255.
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Vehicle-to-pedestrian communication could significantly improve pedestrian safety at signalized intersections. However, it is unlikely that pedestrians will typically be carrying a low latency communication-enabled device with an activated pedestrian safety application in their hand-held device all the time. Because of this, multiple traffic cameras at a signalized intersection could be used to accurately detect and locate pedestrians using deep learning, and broadcast safety alerts related to pedestrians to warn connected and automated vehicles around signalized intersections. However, the unavailability of high-performance roadside computing infrastructure and the limited network bandwidth between traffic cameras and the computing infrastructure limits the ability of real-time data streaming and processing for pedestrian detection. In this paper, we describe an edge computing-based real-time pedestrian detection strategy that combines a pedestrian detection algorithm using deep learning and an efficient data communication approach to reduce bandwidth requirements while maintaining high pedestrian detection accuracy. We utilize a lossy compression technique on traffic camera data to determine the tradeoff between the reduction of the communication bandwidth requirements and a defined pedestrian detection accuracy. The performance of the pedestrian detection strategy is measured in relation to pedestrian classification accuracy with varying peak signal-to-noise ratios. The analyses reveal that we detect pedestrians by maintaining a defined detection accuracy with a peak signal-to-noise ratio 43 dB while reducing the communication bandwidth from 9.82 Mbits/sec to 0.31 Mbits/sec, a 31× reduction.
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Charalambous, Liz, und Sarah Goldberg. „‘Gaps, mishaps and overlaps’. Nursing documentation: How does it affect care?“ Journal of Research in Nursing 21, Nr. 8 (Dezember 2016): 638–48. http://dx.doi.org/10.1177/1744987116678900.
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Complete, accurate and relevant nursing documentation is essential for the multidisciplinary comprehensive geriatric assessment (CGA) process which can improve older patients’ outcomes following a hospital admission. Our aim is to understand older person nurses’ experiences of and attitudes to documentation, via semi-structured, in-depth interviews of eight qualified nurses at an acute hospital trust. Interviews were analysed using the framework approach to identify key themes. Three overarching themes were identified: gaps, mishaps and overlaps. Gaps refer to information which was missing, inaccurate or inconsistent; mishaps refer to the consequences of these inaccuracies and inconsistencies; and overlaps refer to the problem of duplications in recording of information. Older person nurses report many inconsistencies, omissions and duplications in their documentation. This has implications for how nursing contributes to the CGA and the quality of care of older patients. New ways must be found to minimise and streamline existing documentation to ensure that records are complete, timely and person-centred. Nurses should be mindful that emerging digital technology systems do not create further problems. Ward nurses need to take greater control of development of documentation.
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Kornberger, Martin, und Marco R. Thiele. „Experiences With an Efficient Rate-Management Approach for the 8th Tortonian Reservoir in the Vienna Basin“. SPE Reservoir Evaluation & Engineering 17, Nr. 02 (27.03.2014): 165–76. http://dx.doi.org/10.2118/166393-pa.
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Summary Active well-rate management to promote the efficient use of injected fluids and to demote fluid cycling is a simple way to increase recovery in brown fields while minimizing costs and preserving existing field/well-fluid-handling constraints. In this work, we present the application of an efficient flow-based surveillance technique to drive rate-management decisions for the 8th Tortonian reservoir in the Vienna basin, Austria. The 8th Tortonian is a typical example of a decade-long peripheral waterflood on a long, steady decline for which it is difficult to justify expensive drilling/workover programs. Active rate management to improve pattern sweep presents an inexpensive solution to increase recovery. In case of the 8th Tortonian, EUR 10 000 (USD 13,000) was spent to modify well rates, resulting in approximately 5700-m3 (approximately 35,000-STB) incremental oil recovered during a 30-month period. The current oil rate remains higher than the oil rate before the start of the project. Our approach takes advantage of streamline-derived well-allocation factors (WAFs) to quantify injector/producer connections. It is simple and efficient to estimate WAFs with total historical well-fluid rates, well locations, and a geological model. With the WAFs, the ratio of produced oil to injected water (efficiency) of each injector/producer pair can be estimated. Well-pair efficiencies are the starting point for the rate-management approach described in this work. A simple, single-homogeneous-layer system was used in conjunction with historical rates and well locations to estimate the WAFs for the 8th Tortonian reservoir. Connections were compared with available tracer data, and an area of interest was subsequently selected in which both streamlines and tracer data confirmed oil recovery by injected water. A key constraint was to maintain the total gross rate of the area selected at current capacity. New target rates were determined and implemented, resulting in a 30% increase of oil rate during a 30-month period. Considering the simplicity and efficiency of the approach, this is a notable result. The production response of the selected wells showed an increased recovery in conjunction with a relatively constant water cut, suggesting contact with previously unswept oil. All operations and modifications were performed at minimal cost. There were no perforation changes or acidizing jobs involved, and rate changes were obtained simply by changing pump sizes or increasing the number of strokes by changing the V-belt pulley.
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Venturi, Giacomo, Emanuele Nardini, Alessandro Marconi, Stefano Carniani, Matilde Mingozzi, Giovanni Cresci, Filippo Mannucci et al. „MAGNUM survey: A MUSE-Chandra resolved view on ionized outflows and photoionization in the Seyfert galaxy NGC1365“. Astronomy & Astrophysics 619 (November 2018): A74. http://dx.doi.org/10.1051/0004-6361/201833668.
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Context. Ionized outflows, revealed by broad asymmetric wings of the [O III] λ5007 line, are commonly observed in active galactic nuclei (AGN) but the low intrinsic spatial resolution of the observations has generally prevented a detailed characterization of their properties. The MAGNUM survey aims at overcoming these limitations by focusing on the nearest AGN, including NGC 1365, a nearby Seyfert galaxy (D ∼ 17 Mpc), hosting a low-luminosity active nucleus (Lbol ∼ 2 × 1043 erg s−1). Aims. We want to obtain a detailed picture of the ionized gas in the central ∼5 kpc of NGC 1365 in terms of physical properties, kinematics, and ionization mechanisms. We also aim to characterize the warm ionized outflow as a function of distance from the nucleus and its relation with the nuclear X-ray wind. Methods. We employed optical integral-field spectroscopic observations from VLT/MUSE to investigate the warm ionized gas and Chandra ACIS-S X-ray data for the hot highly-ionized phase. We obtained flux, kinematic, and diagnostic maps of the optical emission lines, which we used to disentangle outflows from gravitational motions in the disk and measure the gas properties down to a spatial resolution of ∼70 pc. We then performed imaging spectroscopy on Chandra ACIS-S data guided by the matching with MUSE maps. Results. The [O III] emission mostly traces a kpc-scale biconical outflow ionized by the AGN having velocities up to ∼200 km s−1. Hα emission traces instead star formation in a circumnuclear ring and along the bar, where we detect non-circular streaming gas motions. Soft X-rays are predominantly due to thermal emission from the star-forming regions, but we manage to isolate the AGN photoionized component which nicely matches the [O III] emission. The mass outflow rate of the extended ionized outflow is similar to that of the nuclear X-ray wind and then decreases with radius, implying that the outflow either slows down or that the AGN activity has recently increased. However, the hard X-ray emission from the circumnuclear ring suggests that star formation might in principle contribute to the outflow. The integrated mass outflow rate, kinetic energy rate, and outflow velocity are broadly consistent with the typical relations observed in more luminous AGN.
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Schumacher, Philip N., Gregory Frosig, Jason L. Selzler und Robert A. Weisman. „Precipitation Regimes during Cold-Season Central U.S. Inverted Trough Cases. Part II: A Comparative Case Study“. Weather and Forecasting 23, Nr. 4 (01.08.2008): 617–43. http://dx.doi.org/10.1175/2007waf2006058.1.
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Abstract This is the second of two papers that examine the organization of the precipitation field during central U.S. cold-season cyclones involving inverted troughs (ITs). The first paper (Part I) used a climatology and composites to find synoptic-scale differences between storms with precipitation located ahead of the IT (ahead cases) and those with precipitation located behind the IT (behind cases). This paper expands the conclusions in Part I through the use of a comparative case study between two cyclones. The first cyclone, on 29 October 1996, was an ahead case that produced heavy rainfall and was associated with a potential vorticity (PV) anomaly moving across the central plains. The IT formed in the lee of the Rockies prior to 0600 UTC 29 October and moved east into the northern plains over the next 18 h. The trough itself was coincident with the limiting streamline, which separated moist air rising over the warm front from dry air subsiding behind the cyclone. The second cyclone, on 17–18 January 1996, had precipitation on both sides of the IT and was associated with heavy snow and blizzard conditions in the northern plains and significant ice accumulation in the western Great Lakes. The IT was associated with large frontogenesis over the snow area. The ascent was further enhanced by a jet streak moving across southern Canada. Dynamically, the IT resembled a warm front, with veering winds with height and a strong frontal inversion. The mechanism that appeared to control the different precipitation organization between the two systems was the orientation of the PV anomalies and the airstreams associated with their secondary circulations. This resulted in a differing orientation of the baroclinicity north and east of the cyclone. In the ahead case, the rising branches of the secondary circulations forced by the northern and southern anomalies remained separate. This allowed the baroclinicity to develop along the traditional warm front, while the IT never developed a thermal gradient as it moved east. In the both sides case, the southern stream anomaly helped to fix the northern anomaly-forced jet streak in place, so that a strong temperature gradient developed along the IT with strong frontogenesis and warm-air advection observed behind the IT. As the frontal circulation developed, the direct circulation associated with the right entrance region of a jet streak enhanced the ascent to the west of the IT. A conceptual model is proposed based upon the case studies and the results of Part I. This model can be used by forecasters to differentiate between the precipitation regimes in cyclones associated with ITs.
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Youssef Ali Amer, Ahmed, Femke Wouters, Julie Vranken, Dianne de Korte-de Boer, Valérie Smit-Fun, Patrick Duflot, Marie-Hélène Beaupain et al. „Vital Signs Prediction and Early Warning Score Calculation Based on Continuous Monitoring of Hospitalised Patients Using Wearable Technology“. Sensors 20, Nr. 22 (18.11.2020): 6593. http://dx.doi.org/10.3390/s20226593.
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In this prospective, interventional, international study, we investigate continuous monitoring of hospitalised patients’ vital signs using wearable technology as a basis for real-time early warning scores (EWS) estimation and vital signs time-series prediction. The collected continuous monitored vital signs are heart rate, blood pressure, respiration rate, and oxygen saturation of a heterogeneous patient population hospitalised in cardiology, postsurgical, and dialysis wards. Two aspects are elaborated in this study. The first is the high-rate (every minute) estimation of the statistical values (e.g., minimum and mean) of the vital signs components of the EWS for one-minute segments in contrast with the conventional routine of 2 to 3 times per day. The second aspect explores the use of a hybrid machine learning algorithm of kNN-LS-SVM for predicting future values of monitored vital signs. It is demonstrated that a real-time implementation of EWS in clinical practice is possible. Furthermore, we showed a promising prediction performance of vital signs compared to the most recent state of the art of a boosted approach of LSTM. The reported mean absolute percentage errors of predicting one-hour averaged heart rate are 4.1, 4.5, and 5% for the upcoming one, two, and three hours respectively for cardiology patients. The obtained results in this study show the potential of using wearable technology to continuously monitor the vital signs of hospitalised patients as the real-time estimation of EWS in addition to a reliable prediction of the future values of these vital signs is presented. Ultimately, both approaches of high-rate EWS computation and vital signs time-series prediction is promising to provide efficient cost-utility, ease of mobility and portability, streaming analytics, and early warning for vital signs deterioration.
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Rodgerson, M. J., und L. McNeil. „94 The Comprehensive Frailty Assessment At Forth Valley Royal Hospital (FVRH) Digitalised: For COVID-19 and Beyond!“ Age and Ageing 50, Supplement_1 (März 2021): i12—i42. http://dx.doi.org/10.1093/ageing/afab030.55.
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Abstract Introduction Comprehensive Geriatric Assessment (CGA) improves outcomes for frail patients; at FVRH this is delivered by the Frailty Intervention Team (FIT) comprising of senior nurses, allied health professionals (AHPs) and doctors. Faced with COVID-19, we took the opportunity to digitalise CGA documentation to preserve these benefits for patients whilst facing greater acuity, staffing and time pressures. An electronic solution was adopted to reduce paper-usage in COVID-receiving areas. Prior to COVID-19, CGA was recorded within case-notes, presenting challenges when patients were readmitted out-of-hours as these were stored off-site and not accessible out-of-hours. Method Trakcare is the patient-management system in many Scottish hospitals. The Electronic Patient Record (EPR) was used to record pro-forma against admissions which were accessible and updatable for any patient 24–7-365. Patients meeting the Healthcare Improvement Scotland (HIS) Frailty criteria were considered “frailty-positive”, with an e-alert added- reappearing on any re-admission. Providing no HIS-exclusion criteria, an electronic-CGA (e-CGA) was recorded or updated. The pro-forma designed contained information not immediately available to clerking practitioners. This evolved following discussion amongst the FIT to include information such as escalation-status, medication-arrangements and baseline cognition. Results Over 13 weeks, 116 EPRs were reviewed. During weeks 1–3 (n = 8, 12, 7 respectively), e-CGA completion averaged 31%. Following FIT collaboration, this rose to 82% (n = 9) by week 12. Qualitative feedback from the MDT indicated that FIT, downstream wards and night-staff felt that having access to previous escalation-plans made immediate-management easier to determine, and discussions with families more productive for patients. Conclusions Development of the FVRH e-CGA is ongoing, with an electronic frailty-screening tool being implemented to improve frailty-identification on admission to ensure correct streaming of patients to the FIT. We have demonstrated a cost-neutral method for improving access to CGA for patients using existing IT systems whilst protecting staff time, preserving patient care during the COVID-19 pandemic.
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S., Azuah. „External Influences on Students’ Choice of Clothing in Takoradi Polytechnic“. Journal of Economics and Behavioral Studies 6, Nr. 10 (30.10.2014): 787–94. http://dx.doi.org/10.22610/jebs.v6i10.538.
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Clothing is an important factor in the interpretation of body image which affects the response behaviour of the beholder. A person’s appearance profoundly affects the way he or she is treated by others at home, social gathering, market, job area, office or school. Selecting clothing requires careful considerations. The purpose of the study was to find out external influences on students’ choice of clothing in Takoradi Polytechnic. The research design was descriptive. Questionnaires and focus group discussion guide were used. Departments of Fashion and Accounting participated with respondents chosen through stratified random sampling. Sample consisted of 207 with a total population of 699 students, 77 males and 130 females. Study revealed students dress casually for lectures instead of formally because casual wear could take any form. Male students’ were normally driven internally indicating individuality while female students were mostly externally directed. Both sexes would least choose clothing for warm relationship. The more individuals they were aware of their inner feelings, the more differentiation they exhibited in their choice of clothing. This is contrary to the general perception that students or the youth choice of clothing is socially driven. However, some external factors were also quite significant in students’ choices and should be given close attention if youth clothing are undesirable. This calls for continues education to streamline vital issues that are of significance to academic institutions and the African society as a whole.