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International Conference for High Performance Computing, Networking, Storage and Analysis (SC)

作者： Wang, Yi Agrawal, Gagan Bicer, Tekin Jiang, Wei Ohio State Univ Comp Sci & Engn Columbus OH 43210 USA Argonne Natl Lab Math & Comp Sci Div Lemont IL 60439 USA Quantcast Corp San Francisco CA USA

ISBN: (纸本)9781450337236

In-situ analytics has lately been shown to be an effective approach to reduce both I/O and storage costs for scientific analytics. Developing an efficient in-situ implementation, however, involves many challenges, including parallelization, data movement or sharing, and resource allocation. Based on the premise that Map Reduce can be an appropriate API for specifying scientific analytics applications, we present a novel MapReduce-like framework that supports efficient in-situ scientific analytics, and address several challenges that arise in applying the MapReduce idea for in-situ processing. Specifically, our implementation can load simulated data directly from distributed memory, and it uses a modified API that helps meet the strict memory constraints of in-situ analytics. The framework is designed so that analytics can be launched from the parallel code region of a simulation program. We have developed both time sharing and space sharing modes for maximizing the performance in different scenarios, with the former even avoiding any copying of data from simulation to the analytics program. We demonstrate the functionality, efficiency, and scalability of our system, by using different simulation and analytics programs, executed on clusters with multi-core and many-core nodes.

关键词： MapReduce-Like Framework Situ Scientific Analytics many-core nodes Frameworks time sharing simulating distributed memory IO PREMISES application programming interfaces AXIAL POWER INDICATOR API American Petroleum Institute Scalability Resource utilization space-sharing

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VaSili - A Simulation Runtime Environment for applications in Vehicular Ad-Hoc Networks 12

VaSili - A Simulation Runtime Environment for Applications i...

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2015 12th Annual IEEE Consumer Communications and Networking Conference (CCNC)

作者： Ebers, Sebastian Hellbueck, Horst Fischer, Stefan Univ Lubeck Inst Telemat Lubeck Germany Lubeck Univ Appl Sci Dept Elect Engn & Comp Sci Lubeck Germany

ISBN: (纸本)9781479963904

In recent years, Vehicular Ad-Hoc Networks (VANETs) have become a very active research field. Since real-world experiments might involve potentially costly and complex hardware installations, simulations are a widely used alternative. However, due to, e.g., different scopes of functionality of available VANET simulators, simulations of VANET applications yield different results when using different simulators. Thus, it would be beneficial to test a VANET application in multiple simulation environments. Unfortunately, VANET applications are typically implemented inside of a certain simulator. Hence, to switch the simulator, the source code of the application has to be adapted. To solve this problem, we developed a VANET API which defines the structure and interfaces of crucial VANET components to make them accessible in a unified way. We further developed VANET Simulation Runtime (VaSili), a framework which allows executing VANET API-compliant VANET applications in different VANET simulators without modification. Hence, applications developed using our proposed API can be run in different simulation environments and, since the VANET API is independent of VaSili, on real hardware.

关键词： Simulated Environment simulator V2V Ad hoc networks simulating Operating Environment application programming interfaces AXIAL POWER INDICATOR API American Petroleum Institute Source code

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Identifying Users in Social Networks with Limited Information 31

Identifying Users in Social Networks with Limited Informatio...

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31st IEEE International Conference on Data Engineering

作者： Vesdapunt, Norases Garcia-Molina, Hector Stanford Univ Comp Sci Dept Stanford CA 94305 USA

ISBN: (纸本)9781479979646

We study the problem of Entity Resolution (ER) with limited information. ER is the problem of identifying and merging records that represent the same real-world entity. In this paper, we focus on the resolution of a single node g from one social graph (Google+ in our case) against a second social graph (Twitter in our case). We want to find the best match for g in Twitter, by dynamically probing the Twitter graph (using a public API), limited by the number of API calls that social systems allow. We propose two strategies that are designed for limited information and can be adapted to different limits. We evaluate our strategies against a naive one on a real dataset and show that our strategies can provide improved accuracy with significantly fewer API calls.

关键词： Social Networks TWITTER Social Media Limit information application programming interfaces AXIAL POWER INDICATOR API American Petroleum Institute Optimal matching Line graph Social Capital merger Erbium Entity resolution

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Ambient Control: A Mobile Framework for Dynamically Remixing the Internet of Things 16

Ambient Control: A Mobile Framework for Dynamically Remixing...

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IEEE 16th International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)

作者： Pagel, Max Carlson, Darren Natl Univ Singapore Felicitous Comp Inst Singapore 117548 Singapore

ISBN: (纸本)9781479984619

The number of networked smart devices available in everyday environments is rapidly increasing;however, many current devices adopt mutually incompatible networks, protocols, and application programming interfaces. As such, creating mobile applications that dynamically discover and integrate ambient functionality across multiple vertical markets remains challenging. In this paper, we introduce a novel middleware framework, called Ambient Control, which enables commodity mobile devices (e.g., smart-phones) to dynamically mediate control messaging between incompatible smart devices situated in the user's environment. Ambient Control enables a variety of control capabilities and protocol translation services to be dynamically installed into a user's mobile device on-demand using plug-ins. The approach also features an intuitive "Tap to Interact" workflow that allows a user to tap nearby smart devices with a smart-phone to install required interaction plug-ins and automatically "wire" them together in interesting and potentially unforeseen ways. In this paper, we present a detailed overview of the Ambient Control framework, introduce our fully functional prototype, and present an evaluation indicating that the prototype provides efficient messaging performance and imposes low processing and memory overhead, making it suitable for deployment on many commodity mobile devices.

关键词： Internet of things Smartphone Smart devices PLUG-IN application programming interfaces remixing ambient environment Mobile applications Thing Mobile devices Standing Orders Frameworks Consumers Mobile WATER FAUCETS

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Improving the Accuracy of Software-based Clock Synchronization and Encountering Interrupt Coalescence 9

Improving the Accuracy of Software-based Clock Synchronizati...

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International IEEE Symposium on Precision Clock Synchronization for Measurement, Control and Communication (ISPCS ) Proceedings

作者： Mahmood, Aneeq Sauter, Thilo Danube Univ Continuing Educ Ctr Integrated Sensor Syst Viktor Kaplan Str 2 A-2700 Wr Neustadt Austria

ISBN: (纸本)9781467375955

Employing software timestamps is an effective solution for clock synchronization for networks which are already well established, and cannot be replaced at once by devices supporting hardware timestamps. The synchronization performance, on the other hand, with software timestamps is very low when compared with hardware timestamping-based solutions. This work proposes a novel approach to improve the performance of synchronization with software timestamps by enhancing the networking devices with low-cost external timestampers which can accurately timestamp interrupt signals marking the arrival or departure of a packet. The initial experimental results indicate that this approach considerably improves the end-to-end synchronization performance, and it is possible to bring synchronization accuracy from microsecond to nanosecond range. However, timestamping the interrupt signal does not give the correct egress or ingress timestamp for network cards which employ interrupt coalescence. To this end, this work provides experimental results presenting the impact of interrupt coalescent on synchronization.

关键词： local area networks synchronisation API Ethernet-based real-time networks application programmable interface software timestamps software-based clock synchronization synchronization accuracy Clocks Delays Hardware Integrated circuits Software Synchronization Wireless LAN Computer hardware clock recovery Local Area Networks Timing devices wireless local area network (WLAN) computer software interruption computer programs Integrated circuits Electronic circuits delay application programming interfaces

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Alexander the Great's name in contemporary Demotic sources

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JOURNAL OF EGYPTIAN ARCHAEOLOGY 2015年第1期101卷 340-348页

作者： Bosch-Puche, Francisco Moje, Jan

Analysis of the Demotic variant writings in which Alexander the Great's name occurs in the whole body of available contemporary documentation.

关键词： application programming interfaces Stelae Attestations Papyrus Priests Transcription Vowels Kings Images Faxes

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UCX: An Open Source Framework for HPC Network APIs and Beyond 23

UCX: An Open Source Framework for HPC Network APIs and Beyon...

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IEEE 23rd Annual Symposium on High-Performance Interconnects

作者： Shamis, Pavel Venkata, Manjunath Gorentla Lopez, M. Graham Baker, Matthew B. Hernandez, Oscar Itigin, Yossi Dubman, Mike Shainer, Gilad Graham, Richard L. Liss, Liran Shahar, Yiftah Potluri, Sreeram Rossetti, Davide Becker, Donald Poole, Duncan Lamb, Christopher Kumar, Sameer Stunkel, Craig Bosilca, George Bouteiller, Aurelien Oak Ridge Natl Lab Oak Ridge TN 37831 USA Mellanox Technol Yokneam Illit Israel NVIDIA Corp Santa Clara CA USA IBM Corp Armonk NY USA Univ Tennessee Knoxville TN USA

ISBN: (纸本)9781467391603

This paper presents Unified Communication X (UCX), a set of network APIs and their implementations for high throughput computing. UCX comes from the combined effort of national laboratories, industry, and academia to design and implement a high-performing and highly-scalable network stack for next generation applications and systems. UCX design provides the ability to tailor its APIs and network functionality to suit a wide variety of application domains and hardware. We envision these APIs to satisfy the networking needs of many programming models such as Message Passing Interface (MPI), OpenSHMEM, Partitioned Global Address Space (PGAS) languages, task-based paradigms and I/O bound applications. To evaluate the design we implement the APIs and protocols, and measure the performance of overhead-critical network primitives fundamental for implementing many parallel programming models and system libraries. Our results show that the latency, bandwidth, and message rate achieved by the portable UCX prototype is very close to that of the underlying driver. With UCX, we achieved a message exchange latency of 0.89 us, a bandwidth of 6138.5 MB/s, and a message rate of 14 million messages per second. As far as we know, this is the highest bandwidth and message rate achieved by any network stack (publicly known) on this hardware.

关键词： application program interfaces input-output programs message passing parallel programming public domain software HPC network APIs I/O bound applications MPI OpenSHMEM PGAS languages UCX Unified Communication X high throughput computing highly-scalable network stack message passing interface open source framework parallel programming models partitioned global address space languages system libraries task-based paradigms Bandwidth Electronics packaging Hardware Libraries Memory management programming Protocols HPC Infiniband Middleware PGAS RDMA message passing mannose phosphate isomerase remote procedure calls Parallel programming input-output programs open source software application programming interfaces Infiniband Electronics packaging RDMA Bandwidth High Performance Computing Computer hardware Store management Middleware

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Modeling and Simulating Cyber-Physical Systems using CyPhySim 13

Modeling and Simulating Cyber-Physical Systems using CyPhySi...

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International Conference on Embedded Software (EMSOFT)

作者： Lee, Edward A. Niknami, Mehrdad Nouidui, Thierry S. Wetter, Michael Univ Calif Berkeley Dept EECS Berkeley CA 94720 USA Lawrence Berkeley Natl Lab Berkeley CA USA

ISBN: (纸本)9781467380799

This paper describes an open-source simulator for cyber-physical systems called CyPhySim that is based on Ptolemy II. This simulator supports classical (Runge-Kutta) and quantized-state simulation of ordinary differential equations, modal models (hybrid systems), discrete-event models, the Functional Mockup Interface (FMI) for model-exchange and co-simulation, discrete-time (periodic) systems, and algebraic loop solvers. CyPhySim provides a graphical editor, an XML file syntax for models, and an open API for programmatic construction of models. It includes an innovation called "smooth tokens," which allow for a blend of numerical and symbolic computation, and for certain kinds of system models, dramatically reducing the computation required for simulation.

关键词： XML application program interfaces computational linguistics differential equations discrete event simulation embedded systems functional analysis graphical user interfaces modal analysis public domain software symbol manipulation CyPhySim FMI Ptolemy II XML file syntax algebraic loop solver classical state simulation cyber-physical system discrete event model discrete time system functional mockup interface graphical editor modal model model exchange numerical computation open API open source simulator ordinary differential equation quantized state simulation smooth token symbolic computation Computational modeling Cyber-physical systems Mathematical model Nonlinear dynamical systems Numerical models Semantics Software Symbolic algebra graphical editor application programming interfaces peripheral models discrete time systems open source software Cyber-physical systems PTPRU gene COMPUTATIONAL LINGUISTICS Ordinary differential equation graphical user interfaces Nonlinear dynamical systems discrete event simulation extensible markup language numerical calculation

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MeterPU: A Generic Measurement Abstraction API Enabling Energy-tuned Skeleton Backend Selection 14

MeterPU: A Generic Measurement Abstraction API Enabling Ener...

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13th IEEE International Symposium on Parallel and Distributed Processing with applications

作者： Li, Lu Kessler, Christoph Linkoping Univ IDA Linkoping Sweden

ISBN: (纸本)9781467379526

We present MeterPU, an easy-to-use, generic and low-overhead abstraction API for taking measurements of various metrics (time, energy) on different hardware components (e.g. CPU, DRAM, GPU), using pluggable platform-specific measurement implementations behind a common interface in C++. We show that with MeterPU, not only legacy (time) optimization frameworks, such as autotuned skeleton back-end selection, can be easily retargeted for energy optimization, but also switching different optimization goals for arbitrary code sections now becomes trivial. We apply MeterPU to implement the first energy-tunable skeleton programming framework, based on the SkePU skeleton programming library.

关键词： Energy GPU Heterogeneous architecture LU MeterPU Optimization SkePU Skeleton programming Time Lutetium Energy sources Skeletons bone structure GRAPPER PICK UP Graphics Processing Unit common interface application programming interfaces AXIAL POWER INDICATOR API American Petroleum Institute Abstraction Trivial

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The Platformization of the Web: Making Web Data Platform Ready

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SOCIAL MEDIA + SOCIETY 2015年第2期1卷

作者： Helmond, Anne Univ Amsterdam New Media & Digital Culture Amsterdam Netherlands

In this article, I inquire into Facebook's development as a platform by situating it within the transformation of social network sites into social media platforms. I explore this shift with a historical perspective on, what I refer to as, platformization, or the rise of the platform as the dominant infrastructural and economic model of the social web and its consequences. Platformization entails the extension of social media platforms into the rest of the web and their drive to make external web data "platform ready." The specific technological architecture and ontological distinctiveness of platforms will be examined by taking their programmability into account. I position platformization as a form of platform critique that inquires into the dynamics of the decentralization of platform features and the recentralization of "platform ready" data as a way to examine the consequences of the programmability of social media platforms for the web.

关键词： social media platforms Facebook social network sites application programming interfaces

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