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1

iTunes U  

NSDL National Science Digital Library

You may have been to Harvard and the Sorbonne, but have you ever looked at the handsome educational offerings at iTunesU? Well, it may not be an actual bricks and mortar campus, but this helpful application offers up a healthy sampling of lectures, discussions, and seminars from Duke, MIT, Texas A&M, and a number of equally fine institutions of higher learning. First-time visitors should take a listen to Martin Lewis's "Geography of World Cultures" or some of the lectures culled from Pennsylvania State University. Needless to say, this application is compatible with computers running iTunes.

2

unrestricted Epidemic P2P Live Streaming  

E-print Network

unrestricted Epidemic P2P Live Streaming Optimal Performance Trade-Offs Orange Labs Fabien Mathieu ­ Epidemic P2P Live Streaming ­ 05/29/08 unrestricted This is a joint work with... Thomas Bonald (Orange;Orange Labs - Research & Development ­ Epidemic P2P Live Streaming ­ 05/29/08 unrestricted Outline

Fondements et Applications, Université Paris 7

3

Adaptive Live Video Streaming by Priority Drop  

Microsoft Academic Search

In this paper we explore the use of Priority -progress streaming (PPS) for live video streaming applications with tight latency constraints. PPS is a technique for the delivery of continuous media over variable bit-rate channels. It is based on the simple idea of reordering media components within a time window into priority order before transmission. The main concern when using

Jie Huang; Charles Krasic; Jonathan Walpole; Wu-chi Feng

2003-01-01

4

TextPool: Visualizing Live Text Streams  

Microsoft Academic Search

In today's fast-paced world, it is becoming increasingly difficult to understand and act promptly upon the content of the many information streams available to us. TextPool addresses this problem by quickly summarizing recent content in live text streams, such as newswires and closed captioning. The summarization is a dynamically changing textual collage that clusters related terms. We tested TextPool with

Conrad Albrecht-buehler; Benjamin Watson; David A. Shamma

2004-01-01

5

CodedStream: Live Media Streaming with Overlay Coded Jiang Guo, Ying Zhu, Baochun Li  

E-print Network

CodedStream: Live Media Streaming with Overlay Coded Multicast Jiang Guo, Ying Zhu, Baochun Li in the overlay network remain unused. In this paper, we propose CodedStream, a high-bandwidth live media and network coding may indeed bring significant benefits with respect to improving the quality of live media

Li, Baochun

6

iTunes 5.0  

NSDL National Science Digital Library

Many so-called "digital jukeboxes" make a number of promises in terms of their overall performance. iTunes 5.0 delivers on many of its promises with a number of fine new features. With this latest addition, users can control access with parental controls, find music faster with a new search bar, and download hundreds of radio shows as free podcasts. This version of iTunes is compatible with all operating systems running Windows 2000 or XP or Max OS X 10.2.8 or newer.

2005-01-01

7

Using Temporal Semantics for Live Media Stream Queries  

E-print Network

this media-feature dependency. Third, real-life applications often specify their queries in terms of eventsUsing Temporal Semantics for Live Media Stream Queries Bin Liu1 , Amarnath Gupta2 and Ramesh Jain3 live media streams is a challenging problem that becomes an essential requirement in a growing number

Gupta, Amarnath

8

An analysis of live streaming workloads on the internet  

Microsoft Academic Search

In this paper, we study the live streaming workload from a large content delivery network. Our data, collected over a 3 month period, contains over 70 million requests for 5,000 distinct URLs from clients in over 200 countries. To our knowledge, this is the most extensive data of live streaming on the Internet that has been studied to date. Our

Kunwadee Sripanidkulchai; Bruce M. Maggs; Hui Zhang

2004-01-01

9

The suitability of P2P for live video streaming  

Microsoft Academic Search

This paper discusses peer-to-peer technologies with the focus on video streaming. The primary objective is to determine the suitability of peer-to-peer networking as a platform for live video streaming by assessing available alternatives and developing a reference implementation. This implementation provides a platform for analysis and simulation as a means to determine potential gains derived by implementing video streaming using

Jeff Hinds

10

Measurement of Commercial Peer-To-Peer Live Video Streaming  

Microsoft Academic Search

Peer-to-peer technologies have proved to be effective for various bandwidth intensive, large scale ap- plications such as file-transfer. For many years, there has been tremendous interest in academic environments for live video streaming as another application of P2P. Recently, a number of new commercial scale video streaming systems have cropped up. These systems differ from others in the type of

Shahzad Ali; Anket Mathur; Hui Zhang

2006-01-01

11

Supporting seamless mobility for P2P live streaming.  

PubMed

With advent of various mobile devices with powerful networking and computing capabilities, the users' demand to enjoy live video streaming services such as IPTV with mobile devices has been increasing rapidly. However, it is challenging to get over the degradation of service quality due to data loss caused by the handover. Although many handover schemes were proposed at protocol layers below the application layer, they inherently suffer from data loss while the network is being disconnected during the handover. We therefore propose an efficient application-layer handover scheme to support seamless mobility for P2P live streaming. By simulation experiments, we show that the P2P live streaming system with our proposed handover scheme can improve the playback continuity significantly compared to that without our scheme. PMID:24977171

Kim, Eunsam; Kim, Sangjin; Lee, Choonhwa

2014-01-01

12

Supporting Seamless Mobility for P2P Live Streaming  

PubMed Central

With advent of various mobile devices with powerful networking and computing capabilities, the users' demand to enjoy live video streaming services such as IPTV with mobile devices has been increasing rapidly. However, it is challenging to get over the degradation of service quality due to data loss caused by the handover. Although many handover schemes were proposed at protocol layers below the application layer, they inherently suffer from data loss while the network is being disconnected during the handover. We therefore propose an efficient application-layer handover scheme to support seamless mobility for P2P live streaming. By simulation experiments, we show that the P2P live streaming system with our proposed handover scheme can improve the playback continuity significantly compared to that without our scheme. PMID:24977171

Kim, Eunsam; Kim, Sangjin; Lee, Choonhwa

2014-01-01

13

Apple Education iTunes U User's Guide  

E-print Network

Apple Education iTunes U User's Guide September 4, 2007 #12; Apple Inc. © 2007 Apple Inc. All rights reserved. Apple, the Apple logo, iPod, iTunes, Mac, and QuickTime are trademarks of Apple Inc., registered in the U.S. and other countries. Apple TV, iPhone, and Safari are trademarks of Apple Inc. i

Bieber, Michael

14

Placing Multicast Proxies for Internet Live Media Streaming  

Microsoft Academic Search

Placing multicast proxies on the Internet can largely reduce the delivery delay of Internet live media streaming using overlay multicast mechanisms. In this paper, we propose a new approach to address the issue of proxy placement in an overlay multicast network. The task is to decide an optimal placement of multicast proxies in the overlay multicast network so as to

Jun Guo; Sanjay Jha

2007-01-01

15

A hierarchical characterization of a live streaming media workload  

Microsoft Academic Search

We present a thorough characterization of what we believe to be the first significant live Internet streaming media workload in the scientific literature. Our characterization of over 3.5 million requests spanning a 28-day period is done at three in- creasingly granular levels, corresponding to clients, sessions, and transfers. Our findings support two important conclusions. First, we show that the nature

Eveline Veloso; Virglio A. F. Almeida; Wagner Meira Jr.; Azer Bestavros; Shudong Jin

2006-01-01

16

A hierarchical characterization of a live streaming media workload  

Microsoft Academic Search

We present a thorough characterization of what we believe to be the first significant live Internet streaming media workload in the scientific literature. Our characterization of over 3.5 million requests spanning a 28-day period is done at three increasingly granular levels, corresponding to clients, sessions, and transfers. Our findings support two important conclusions. First, we show that the nature of

Eveline Veloso; Virglio Almeida; Wagner Meira Jr.; Azer Bestavros; Shudong Jin

2006-01-01

17

Epidemic Live Streaming: Optimal Performance Trade-Offs Thomas Bonald  

E-print Network

.bonald,fabien.mathieu,diego.perino} @orange-ftgroup.com Thomson Technology Paris Laboratory Boulogne-Billancourt, France {laurent dissemination at an optimal rate and within an optimal delay, up to an addi- tive constant term. This qualitative result suggests that epi- demic live streaming algorithms can achieve near-unbeatable rates

Bonald, Thomas

18

Sepidar: Incentivized Market-Based P2P Live-Streaming on the Gradient Overlay Network  

Microsoft Academic Search

Live streaming of video content using overlay networks has gained widespread adoption on the Internet. This paper presents Sepidar, a distributed market-based model, that builds and maintains overlay network trees, which are approximately minimal height, for delivering live media as a number of sub streams. A streaming tree is constructed for each sub stream such that nodes that contribute higher

Amir H. Payberah; Fatemeh Rahimian; Seif Haridi; Jim Dowling

2010-01-01

19

gradienTv: Market-based P2P live media streaming on the Gradient overlay  

E-print Network

gradienTv: Market-based P2P live media streaming on the Gradient overlay Amir H. Payberah1,2 , Jim - Royal Institute of Technology Abstract. This paper presents gradienTv, a distributed, market-based approach to live streaming. In gradienTv, multiple streaming trees are constructed using a market

Boyer, Edmond

20

Flourishing in the internet: The huge success of live peer-to-peer media streaming  

Microsoft Academic Search

Peer-to-Peer (P2P) media streaming networks have attracted significant research interest recently. However, it is challenging to design live P2P media streaming systems because of the stringent time constraints on the delivered media streams, which require more efficient and resilient overlay. In this paper, we focus on live P2P media streaming networks, a promising application flourishing in the Internet and which

Zhiguang Qin; Xiaodong Wei; Mengjuan Liu; Lei Yang

2010-01-01

21

iTunes U: An Opportunity for Students  

ERIC Educational Resources Information Center

Purpose: The aim of this paper is to demonstrate that, with a bit of creative thinking, elements of certain university-wide projects (in this case study, establishing an iTunes U site) can be incorporated into student studies and assessment as real-world learning opportunities. Design/methodology/approach: Describes three different approaches

Germany, Lisa

2011-01-01

22

Podcasting for Language Learning through iTunes U: The Learner's View  

ERIC Educational Resources Information Center

iTunes U has become the main worldwide provider of educational podcasts but, despite its popularity, little is known about the type of user who downloads iTunes U language resources, or how those resources are used. This paper presents the results of the first major survey (1891 responses) of users of one of the most successful iTunes U content

Rosell-Aguilar, Fernando

2013-01-01

23

On Network Utilization of Peer-to-Peer Video Live Streaming on the Internet  

Microsoft Academic Search

Efficient network utilization is essential towards the deployment of large scale peer-to-peer (P2P) video live streaming services on the Internet. Push-pull hybrid schemes and pull schemes provide practical solutions to P2P video live streaming, but network utilization remains unaddressed. In this paper, we use \\

Xiangyang Zhang; Hossam Hassanein

2011-01-01

24

CoreCast: Efficient Live Streaming in the Core-Edge Separated Internet  

E-print Network

The increasing bandwidth offered by home broadband connections makes delivering live streaming and IPTV content. 1. INTRODUCTION In today's IPTV and live streaming landscape we see two major directions. On one to their customers in triple-play packages consisting of IPTV, IP telephony and Internet access. On the other hand we

Politècnica de Catalunya, Universitat

25

Peer-to-peer live streaming for massively multiplayer online games  

E-print Network

screen-captured video of the game is one of the most desirable communication tools. Players can use. It is therefore critical to minimize the transmission rate at the source. · Live video streaming shouldPeer-to-peer live streaming for massively multiplayer online games Shakeel Ahmad Christos Bouras

Bouras, Christos

26

Spatial Biology of Northern Watersnakes (Nerodia sipedon) Living along an Urban Stream  

E-print Network

dominated by humans must deal with these problems. Studies of wildlife in urban environments have beenSpatial Biology of Northern Watersnakes (Nerodia sipedon) Living along an Urban Stream Abigail Pattishall1,2 and David Cundall1 Fifty Nerodia sipedon living along two kilometers of an urban stream

Behe, Michael J.

27

CliqueStream: An Efficient and Fault-Resilient Live Streaming Network on a Clustered Peer-to-Peer Overlay  

Microsoft Academic Search

Several overlay-based live multimedia streaming plat- forms have been proposed in the recent peer-to-peer stream- ing literature. In most of the cases, the overlay neighbors are chosen randomly for robustness of the overlay. How- ever, this causes nodes that are distant in terms of proximity in the underlying physical network to become neighbors, and thus data travels unnecessary distances before

Shah Asaduzzaman; Ying Qiao; Gregor v. Bochmann

2008-01-01

28

Optimizing Substream Scheduling for Peer-to-Peer Live Streaming  

E-print Network

, these benefits come with the cost of long delay, due to buffermap advertisement and the pulling at the child parents [1]. By retrieving packets from its parents, a child can aggregate and assemble a full stream to achieve stream continuity.1 With multiple parents, a child needs to determine which parents should deliver

Chan, Shueng-Han Gary

29

Research and design of a new model for P2P live streaming system  

NASA Astrophysics Data System (ADS)

According to the research and analysis of typical models for P2P (Peer to Peer) live streaming system, we overview and summarize the strengths and weaknesses of existing technologies. This paper proposes a new model for P2P live streaming system, which used a scheme combining unicast and multicast trees, and analysis the strategy of node management. The model combines advantages of easy maintenance of unicast tree and load balancing of multicast tree, and enhances the availability, stability and quality of service for live streaming system.

Li, Ying; Yang, Lijuan; Liu, Haiyan

2013-07-01

30

TextPool: Visualizing Live Text Streams Conrad Albrecht-Buehler*  

E-print Network

TextPool: Visualizing Live Text Streams Conrad Albrecht-Buehler* Northwestern University Benjamin * {conrad,watsonb,ayman}@cs.northwestern.edu Figure 1: A TextPool visualization of six hours of content

31

A Live-Bucket for Use in Surveys of Small Streams  

Microsoft Academic Search

Conventional equipment and methods used to hold fish during surveys of small streams are either cumbersome or cause injury and kill fish. We designed a live-bucket that is spillproof, inexpensive (US$20), easily assembled, keeps fish in good condition, and does not restrict a person's movements. The livebucket was used during electrofishing surveys on 120 stream reaches ranging in water surface

Daniel J. Isaak; Wayne A. Hubert

1997-01-01

32

Small-scale dispersal and population structure in stream-living brown trout (Salmo trutta) inferred  

E-print Network

Small-scale dispersal and population structure in stream-living brown trout (Salmo trutta) inferred-scale location change of resident brown trout (Salmo trutta) in a small stream (1500 m). During the first summer pour étudier l'importance des changements d'emplacement à petite échelle de la truite de mer (Salmo

Bernatchez, Louis

33

Level-based peer-to-peer live streaming with rateless codes  

E-print Network

of reality TV, shows, concerts, or, as in Xfire [4] and TwitchTV [5], live streams from online gamers to stream screen-captured video of their game. Players can use the system to show their skills, share- net TV and gaming communities, we have identified another requirement, which has not been addressed

Paris-Sud XI, Université de

34

An approach to the quantification of delay variation effects on live audio streams  

Microsoft Academic Search

The aim of the paper is to propose an approach to studying delay variation effects on live voice streams and mapping them to quantifiable parameters. A suitable performance evaluation framework is defined within which an appropriate metric, based on the (m,k) firm guarantee criterion, is studied and tailored to interactive voice streams. This metric is based on the observation that

D. Loukatos; V. Zoi; P. Stathopoulos; A. Roustas; N. Mitrou

2003-01-01

35

The Pollution Attack in P2P Live Video Streaming: Measurement Results and Defenses  

E-print Network

The Pollution Attack in P2P Live Video Streaming: Measurement Results and Defenses Prithula Dhungel in the recent years. In this paper, we examine the stream pollution attack, for which the attacker mixes polluted chunks into the P2P distribu- tion, degrading the quality of the rendered media at the receivers

Saxena, Nitesh

36

Fetching Strategy in the Startup Stage of p2p Live Streaming  

Microsoft Academic Search

Fetching Strategy in the Startup Stage of p2p Live Streaming 1 AbstractA protocol named Threshold Bipolar (TB) is proposed as a fetching strategy at the startup stage of p2p live streaming systems. In this protocol, chunks are fetched consecutively from buffer head at the beginning. After the buffer is filled into a threshold, chunks at the buffer tail will be

Chunxi Li; Changjia Chen

2008-01-01

37

A Hierarchical Characterization of a Live Streaming Media Workload Eveline Veloso Virgilio Almeida Wagner Meira Azer Bestavros Shudong Jin  

E-print Network

characteristics of live media access workloads are likely to be highly dependent on the nature of the live contentA Hierarchical Characterization of a Live Streaming Media Workload£ Eveline Veloso Virg present what we believe to be the first thorough characterization of live streaming media content

38

A Hierarchical Characterization of a Live Streaming Media Workload Eveline Veloso Virg lio Almeida Wagner Meira Azer Bestavros Shudong Jin  

E-print Network

characteristics of live media access workloads are likely to be highly dependent on the nature of the live contentA Hierarchical Characterization of a Live Streaming Media Workload #3; Eveline Veloso Virg?? �lio present what we believe to be the first thorough characterization of live streaming media content

39

Crane Cam: Live Streaming Video of Sandhill Crane Migration  

NSDL National Science Digital Library

A National Geographic feature, Crane Cam provides multimedia shows, a photo gallery, map, and viewings from a live remote camera at Audubon's Rowe Sanctuary. While the live broadcast has ended, visitors can still access the information about cranes and view highlights from the footage that was captured. Requires Real Player 10.5 plug-in.

2008-01-02

40

Initial Offset Placement in p2p Live Streaming Systems  

Microsoft Academic Search

Initial offset placement in p2p streaming systems is studied in this paper. Proportional placement (PP) scheme is proposed. In this scheme, peer places the initial offset as the offset reported by other reference peer with a shift proportional to the buffer width or offset lag of this reference peer. This will introduce a stable placement that supports larger buffer width

Chunxi Li; Changjia Chen

2008-01-01

41

Scalable Peer-to-Peer Streaming for Live Entertainment Content  

E-print Network

applications ­ the most obvious being IPTV (Internet Protocol Television) for the distribution of live audio content, IPTV service providers currently fence off a small portion of the Internet and deploy native

Clegg, Richard G.

42

An immersive surgery training system with live streaming capability.  

PubMed

Providing real-time, interactive immersive surgical training has been a key research area in telemedicine. Earlier approaches have mainly adopted videotaped training that can only show imagery from a fixed view point. Recent advances on commodity 3D imaging have enabled a new paradigm for immersive surgical training by acquiring nearly complete 3D reconstructions of actual surgical procedures. However, unlike 2D videotaping that can easily stream data in real-time, by far 3D imaging based solutions require pre-capturing and processing the data; surgical trainings using the data have to be conducted offline after the acquisition. In this paper, we present a new real-time immersive 3D surgical training system. Our solution builds upon the recent multi-Kinect based surgical training system [1] that can acquire and display high delity 3D surgical procedures using only a small number of Microsoft Kinect sensors. We build on top of the system a client-server model for real-time streaming. On the server front, we efficiently fuse multiple Kinect data acquired from different viewpoints and compress and then stream the data to the client. On the client front, we build an interactive space-time navigator to allow remote users (e.g., trainees) to witness the surgical procedure in real-time as if they were present in the room. PMID:24732560

Yang, Yang; Guo, Xinqing; Yu, Zhan; Steiner, Karl V; Barner, Kenneth E; Bauer, Thomas L; Yu, Jingyi

2014-01-01

43

StreamSide LiveStock excLuSion: A tool for increasing farm income and improving water quality  

E-print Network

StreamSide LiveStock excLuSion: A tool for increasing farm income and improving water quality by R, and improvements in riparian vegetation and in-stream water quality. Livestock stream exclusion practices and improving water quality 1 There are several reasons why a producer might choose to limit livestock stream

Liskiewicz, Maciej

44

Deploying P2P networks for large-scale live video-streaming service [Peer-to-Peer Multimedia Streaming  

Microsoft Academic Search

Peer-to-peer (P2P) networks have been adopted for Internet live video-streaming service, and several practical systems have been deployed in past years due to the inherent scalability and ease of deployment. However, most of these systems are commercial and proprietary, and hence little research was done in the area of characterizing practical system performance properties. In this article, we mainly present

Y. Tang Yun; J.-G. Luo Jian-Guang; M. Zhang Meng; S.-Q. Yang Shi-Qiang; Q. Zhang Qian

2007-01-01

45

Robust Live Media Streaming in Swarms Thomas Locher, Remo Meier,  

E-print Network

commercial products for Internet television such as JumpTV1 or PPLive2 use a decentralized architecture is granted without fee provided that copies are not made or distributed for profit or commercial advantage capabilities or act selfishly. We investigate the problem of efficient live data dissemination (e.g., TV

Schmid, Stefan

46

Collaboratively Scheduling to Decrease Inter-AS Traffic in P2P Live Streaming  

Microsoft Academic Search

In the existing data fetching algorithms for P2P streaming systems, the peers usually fetch data independently, leading to huge inter-AS traffic (AS: autonomous system). This paper proposes CoFetch, a collaborative fetching algorithm for P2P live streaming systems to decrease inter-AS traffic. In CoFetch, to avoid that all peers fetch the same data from inter-AS connection, instead of aggressively fetching data

Xuping Tu; Hai Jin; Xiaofei Liao; Weidong Wang; Sirui Yang; Qi Huang

2008-01-01

47

Large-scale live media streaming over peer-to-peer networks through global internet  

Microsoft Academic Search

We describe the design and implementation of unstructured peer-to-peer networks for large-scale live media streaming through global Internet in this paper. In so called GridMedia system, we adopt gossip-based protocol to organize end nodes into an application layer overlay. Each node in GridMedia independently selects its neighbors and utilizes a novel and efficient push-pull streaming mechanism to fetch data from

Meng Zhang; Li Zhao; Yun Tang; Jian-Guang Luo; Shi-Qiang Yang

2005-01-01

48

Towards low-redundancy push-pull P2P live streaming  

Microsoft Academic Search

P2P live streaming systems are developed in two major approaches: tree-push versus mesh-pull. The hybrid push-pull streaming, as an emerging and promising approach, offers a good tradeoff between traffic overhead and system throughput. In this paper, we demonstrate that video redundancy is a large contributor of the traffic overhead in push-pull systems. To reduce the traffic overhead, we propose simple

Zhenjiang Li; Yao Yu; Xiaojun Hei; Danny H. K. Tsang

2008-01-01

49

Modeling User Behavior in P2P Live Video Streaming Systems through a Bayesian Network  

Microsoft Academic Search

\\u000a Live video streaming over a Peer-to-Peer (P2P) architecture is promising due to its scalability and ease of deployment. Nevertheless,\\u000a P2P-based video streaming systems still face some challenges regarding their performance. These systems are in fact overlays\\u000a of users who control peers. As peers depend upon each other for receiving the video stream, the user behavior has an impact\\u000a over the

Ihsan Ullah; Grgory Bonnet; Guillaume Doyen; Dominique Gati

2010-01-01

50

Push-Pull Two-Layer Super-Peer based P2P Live Media Streaming  

NASA Astrophysics Data System (ADS)

Peer-to-peer (P2P) file sharing has become increasingly popular, accounting for as much as 70% of Internet traffic by some estimates. Recently, we have been witnessing the emergence of a new class of popular P2P applications, namely, P2P audio and video streaming. In this study, we propose and investigate a full distributed, scalable and cooperative protocol for live video streaming in an overlay peer-to-peer network. Our protocol, termed P2P Super-Peer based Unstructured Live Media Streaming (PALMS-SP), makes use of combination of push-pull scheduling methods to achieve high performance (in term of delay, stream continuity, cooperation, etc.). The main contribution of PALMS-SP is that it reduces the end-to-end streaming delay and in turn results better delivered quality. We have extensively evaluated the performance of PALMS-SP. Our experiments demonstrate that PALMS-SP with the existence of super-peers achieves better streaming quality in comparison with other existing streaming applications.

Hoong, Poo Kuan; Matsuo, Hiroshi

51

Adaptive live multicast video streaming of SVC with UEP FEC  

NASA Astrophysics Data System (ADS)

Ideally, video streaming systems should provide the best quality video a user's device can handle without compromising on downloading speed. In this article, an improved video transmission system is presented which dynamically enhances the video quality based on a user's current network state and repairs errors from data lost in the video transmission. The system incorporates three main components: Scalable Video Coding (SVC) with three layers, multicast based on Receiver Layered Multicast (RLM) and an UnEqual Forward Error Correction (FEC) algorithm. The SVC provides an efficient method for providing different levels of video quality, stored as enhancement layers. In the presented system, a proportional-integral-derivative (PID) controller was implemented to dynamically adjust the video quality, adding or subtracting quality layers as appropriate. In addition, an FEC algorithm was added to compensate for data lost in transmission. A two dimensional FEC was used. The FEC algorithm came from the Pro MPEG code of practice #3 release 2. Several bit errors scenarios were tested (step function, cosine wave) with different bandwidth size and error values were simulated. The suggested scheme which includes SVC video encoding with 3 layers over IP Multicast with Unequal FEC algorithm was investigated under different channel conditions, variable bandwidths and different bit error rates. The results indicate improvement of the video quality in terms of PSNR over previous transmission schemes.

Lev, Avram; Lasry, Amir; Loants, Maoz; Hadar, Ofer

2014-09-01

52

V3: A Vehicle-to-Vehicle Live Video Streaming Architecture  

Microsoft Academic Search

We consider the problem of how to enable a live video streaming service to vehicles in motion. In such applications, the video source can be a typical video server or vehicles with appropriate capability, while the video receivers are vehicles that are driving on the road. An infrastructure-based approach relies on strategically deployed base stations and video servers to forward

Meng Guo; Mostafa H. Ammar; Ellen W. Zegura

2005-01-01

53

Who Wants To Live Here? Water Sampling At Our Local Pond and Stream  

NSDL National Science Digital Library

This activity is a field activity where students will perform various water quality tests to determine the types of organisms that live in a local pond and stream, and the characteristics that those aquatic environments seem to have that the organisms favor.

Van Kekerix, Susan

54

User Behavior Anticipation in P2P Live Video Streaming Systems through a Bayesian Network  

E-print Network

of such a network cover a large spectrum, from the anticipation of system size and churn or the estimationUser Behavior Anticipation in P2P Live Video Streaming Systems through a Bayesian Network Ihsan measurement campaigns covering large-scale systems and long time periods have been performed. In this paper

Paris-Sud XI, Université de

55

Using layered video to provide incentives in P2P live streaming  

Microsoft Academic Search

In this paper, we design a distributed incentive mechanism for mesh-pull P2P live streaming networks. In our system, a video is encoded into layers with lower layers having more importance. The system is heterogeneous with peers having different uplink bandwidths. We design a distributed protocol in which a peer contributing more uplink bandwidth receives more layers and consequently better video

Zhengye Liu; Yanming Sheny; Shivendra S. Panwary; Keith W. Rossz; Yao Wangy

2007-01-01

56

On providing reliability guarantees in live video streaming with collaborative clients  

Microsoft Academic Search

Although many overlay and P2P approaches have been proposed to assist large-scale live video streaming, how to ensure service quality and reliability still remains a challenging issue. Peer dynamics, especially unscheduled node departures, affect the perceived video quality at a peer node in two ways. In particular, the amplitude of quality fluctuations and the duration for which stable quality video

Aravindan Raghuveer; Yingfei Dongand; David Du

2007-01-01

57

An Authentication Scheme in Peer-to-Peer Based Live Stream Sharing Management Systems  

Microsoft Academic Search

Peer-to-peer based live stream sharing platform is a novel technique for distributing visual data. Because of developments in computer equipment and network service, viewers can watch shows via the Internet rather than through the conventional broadcasted manner. Although data access via the Internet is more convenient, it is more difficult to manage the data transmission, and issues such as copyrighting

Shiuh-jeng Wang; Yuh-ren Tsai; Pin-you Chen

2008-01-01

58

On Minimizing Average End-to-End Delay in P2P Live Streaming Systems  

E-print Network

streaming applications have exhibited grow- ing popularity, such as IPTV, VOIP, and video conferencing deployment of P2P systems. For example, IPTV deployment from commercial service providers is far below downloading capacities on peers, but also allows IPTV service providers to deliver live content at diverse

Ravindran, Binoy

59

Peer-to-peer live streaming for massively multiplayer online games  

E-print Network

presents a peer-to-peer live video system that enables MMOG players to stream screen-captured video of their game. Players can use the system to show their skills, share experience with friends, or coordinate screen-captured video of the game is one of the most desirable communication tools. Players can use

Bouras, Christos

60

Using Text Mining to Uncover Students' Technology-Related Problems in Live Video Streaming  

ERIC Educational Resources Information Center

Because of their capacity to sift through large amounts of data, text mining and data mining are enabling higher education institutions to reveal valuable patterns in students' learning behaviours without having to resort to traditional survey methods. In an effort to uncover live video streaming (LVS) students' technology related-problems and to

Abdous, M'hammed; He, Wu

2011-01-01

61

CHEAT-PROOF COOPERATION STRATEGIES FOR WIRELESS LIVE STREAMING SOCIAL NETWORKS  

E-print Network

other to obtain better video qual- ity. These users form a wireless live-streaming social network and every user wishes to watch video with as high as possible quality while paying as less as cost to the users. This paper proposes a game-theoretic frame- work to model user behavior and designs incentive

Liu, K. J. Ray

62

AmbiStream: A Middleware for Multimedia Streaming on Heterogeneous Mobile Devices  

E-print Network

to smartphones. 3 www.npr.org/services/mobile 4 www.nasa.gov/connect/apps.html 5 itunes.apple.com/us/appAmbiStream: A Middleware for Multimedia Streaming on Heterogeneous Mobile Devices Emil Andriescu1 streaming, mobile, smartphone, middleware 1 Introduction The present generation of smartphones enables

Paris-Sud XI, Université de

63

gradienTv: Market-Based P2P Live Media Streaming on the Gradient Overlay  

Microsoft Academic Search

\\u000a This paper presents gradienTv, a distributed, market-based approach to live streaming. In gradienTv, multiple streaming trees\\u000a are constructed using a market-based approach, such that nodes with increasing upload bandwidth are located closer to the\\u000a media source at the roots of the trees. Market-based approaches, however, exhibit slow convergence properties on random overlay\\u000a networks, so to facilitate the timely discovery of

Amir H. Payberah; Jim Dowling; Fatemeh Rahimian; Seif Haridi

2010-01-01

64

Scheduling Algorithm used in Live Media Streaming Based on Data-drive Overlay Network  

NASA Astrophysics Data System (ADS)

To improve the playback quality of P2P media streaming system terminal nodes and enhances the overall performance, a data scheduling algorithm(LDSA) is proposed, it is able to dynamically adjust the pending request according to the node ability. The algorithm in satisfies the media streaming living in the time response foundation, had considered how to minimize the waiting time for the requests in the node and the rapid distribution in network of scarce data blocks. Through compares with the existing scheduling algorithm, the experimental results are proved that the MDSA algorithm have the prominent performance in diminishing the accumulated latency and enhancing the media broadcast quality

Na, Xu; Shuang, Sun

65

On providing reliability guarantees in live video streaming with collaborative clients  

NASA Astrophysics Data System (ADS)

Although many overlay and P2P approaches have been proposed to assist large-scale live video streaming, how to ensure service quality and reliability still remains a challenging issue. Peer dynamics, especially unscheduled node departures, affect the perceived video quality at a peer node in two ways. In particular, the amplitude of quality fluctuations and the duration for which stable quality video is available at a node heavily depend on the nature of peer departures in the system. In this paper, we first propose a service quality model to quantify the quality and stability of a video stream in a P2P streaming environment. Based on this model, we further develop tree construction algorithms that ensure that every peer in the collaborative network receives a video stream with a statistical reliability guarantee on quality. A key advantage of the proposed approach is that we can now explicitly control the quality and stability of the video stream supplied to every node. This is the fundamental difference of our approach from existing approaches that provide stream stability by over-provisioning resources allocated to every peer. Also, the proposed tree construction schemes decide the position of a node in the delivery tree based on both its estimated reliability and upstream bandwidth contribution while striving to minimize the overall load on the server. Our simulations show that our algorithms use the server resources very efficiently while significantly improving the video stability at peers.

Raghuveer, Aravindan; Dong, Yingfei; Du, David

2007-01-01

66

A tracker-based P2P system for live multimedia streaming services  

Microsoft Academic Search

In this paper, we propose a tracker-based Peer to Peer (P2P) system for live multimedia streaming services. Our system is based on the Proactive network Provider Participation for P2P (P4P) framework which induces the cooperation between P2P systems and network service providers to achieve the best possible P2P application performance and efficient and fair usage of network resources. In the

Haesun Byun; Meejeong Lee

2011-01-01

67

Inferring Network-Wide Quality in P2P Live Streaming Systems  

Microsoft Academic Search

This paper explores how to remotely monitor network-wide quality in mesh-pull P2P live streaming systems. Peers in such systems advertise to each other buffer maps which summarize the chunks of data that they currently have cached and make available for sharing. We show how buffer maps can be exploited to monitor network-wide quality. We show that information provided in a

Xiaojun Hei; Yong Liu; Keith W. Ross

2007-01-01

68

Dynamic asynchronous buffer management to improve data continuity in P2P live streaming  

Microsoft Academic Search

In data-driven mesh-based P2P live streaming system, the playback buffer management affects the audiences' quality of experience (QoE) significantly. Due to the instability and heterogeneity of P2P networks, the buffer is not always ready for playback. It is not only associated with the media timestamp, but also with the data availability in its neighbors. So how to manage the buffer

Shanzhen Lan; Qi Zhang; Xinggong Zhang; Zongming Guo

2011-01-01

69

Inferring Network-Wide Quality in P2P Live Streaming Systems  

Microsoft Academic Search

This paper explores how to remotely monitor network-wide quality in mesh-pull P2P live streaming systems. Peers in such systems advertise to each other buffer maps which summarize the chunks of data that they currently have cached and make available for sharing. We show how buffer maps can be exploited to monitor network-wide quality. We show that information provided in a

Xiaojun Hei; Yong Liu; Keith W. Ross

70

Towards an Incentive Mechanism for Peer-to-Peer Multimedia Live Streaming Systems  

Microsoft Academic Search

Incentive mechanisms are essential components of peer-to- peer systems for file sharing such as BitTorrent, since they enforce peers to share their resources and to participate. Recent P2P systems that distribute live multimedia streams take their inspiration from BitTorrent, but have not defined incentive mechanisms appropriate to the nature of contin- uous media. In this article, we uncover the way

Thomas Silverston; Olivier Fourmaux; Jon Crowcroft

2008-01-01

71

A Measurement Study of Cache Rejection in P2P Live Streaming System  

Microsoft Academic Search

In P2P system, each peer caches the received data for accessing of other peers. P2P live streaming system audiencepsilas TV-like watching pattern brings unique characteristics for its cache management algorithm. By measuring and studying the cache rejection algorithm used in PPLive with our PPLive crawler, we found a simple but interesting cache rejection algorithm used in PPLive, i.e. the cache

Yishuai Chen; Changjia Chen; Chunxi Li

2008-01-01

72

Patterns of natural mortality in stream-living brown trout (Salmo trutta)  

USGS Publications Warehouse

We tested the hypothesis that lifetime mortality patterns and their corresponding rates and causal factors differ among populations of stream-living salmonids. To this end, we examined the lifetime mortality patterns of several successive cohorts of two stream-living brown trout (Salmo trutta) populations in Spain and Denmark. In the southern population, we observed a consistent two-phase pattern, in which mortality was negligible during the first half of the lifetime and severe during the rest of the lifetime. In contrast, the northern population demonstrated a three-phase pattern with an earlier phase varying from negligible to severe, followed by a second stage of weak mortality, and lastly by a third life stage of severe mortality. Despite substantial differences in the mortality patterns between the two populations, the combined effect of recruitment (as a proxy of the density-dependent processes occurring during the lifetime) and mean body mass (as a proxy of growth experienced by individuals in a given cohort) explained c. 89% of the total lifetime mortality rates across cohorts and populations. A comparison with other published data on populations of stream-living brown trout within its native range highlighted lifetime mortality patterns of one, two, three and four phases, but also suggested that common patterns may occur in populations that experience similar individual growth and population density. ?? 2011 Blackwell Publishing Ltd.

Lobon-Cervia, J.; Budy, P.; Mortensen, E.

2012-01-01

73

A Flexible Divide-And-Conquer Protocol for Multi-View Peer-to-Peer Live Streaming  

E-print Network

. In general, multi-view P2P streaming can be used in two types of applications: 1) Multi-View Internet TV. Fig. 1. Multi-View Internet TV ap- plication. Fig. 2. Multi-camera live streaming of stock-car racing extensive packet- level simulations show that DAC is efficient in allocating the overall system bandwidth

Xu, Lisong

74

Gordon and Mike's ICT Podcast: iTunes, Origami and Mega Mergers: Updates and New News  

NSDL National Science Digital Library

Gordon and Mike's ICT Podcast offers perspectives on the information and communication technologies (ICT) industries from Gordon Snyder and Mike Qaissaunee. In this podcast, Mike and Gordon review some technology updates from past shows and some new developments with iTunes, Origami, and mergers between ICT companies. The running time for this show is 31:44.This podcast is available for direct download in mp3 format from the Libsyn site, or click here to subscribe to the whole series in iTunes.

Qaissaunee, Michael; Snyder, Gordon F.

2008-02-07

75

CliqueStream: Creating an efficient and resilient transport overlay for peer-to-peer live streaming using a clustered DHT  

Microsoft Academic Search

Several overlay-based live multimedia streaming platforms have been proposed in the recent peer-to-peer streaming literature.\\u000a In most of the cases, the overlay neighbors are chosen randomly for robustness of the overlay. However, this causes nodes\\u000a that are distant in terms of proximity in the underlying physical network to become neighbors, and thus data travels unnecessary\\u000a distances before reaching the destination.

Shah Asaduzzaman; Ying Qiao; Gregor von Bochmann

2010-01-01

76

iTunes University and the Classroom: Can Podcasts Replace Professors?  

ERIC Educational Resources Information Center

iTunes University, a website with downloadable educational podcasts, can provide students the opportunity to obtain professors' lectures when students are unable to attend class. To determine the effectiveness of audio lectures in higher education, undergraduate general psychology students participated in one of two conditions. In the lecture

McKinney, Dani; Dyck, Jennifer L.; Luber, Elise S.

2009-01-01

77

Reducing perceptual discontinuity in peer-to-peer live video streaming based on frame loss visibility information  

Microsoft Academic Search

When a live streaming video is delivered over a peer- to-peer (P2P) network, the chunk delay is always a problem of great concern. A serious chunk delay can produce obvious discontinuity of the streaming video, resulting in low satisfaction of the service. Video on P2P is divided into several chunks and distributed to the peers. Each chunk has its own

Ricky Christanto; Shaou-Gang Miaou; Ting-Lan Lin

2011-01-01

78

KQStream: Kindred-Based QoS-Aware Live Media Streaming in Heterogeneous Peer-to-Peer Environments  

Microsoft Academic Search

This paper presents the design of a Kindred-based QoS-aware Live Media Streaming (KQStream) system in heterogeneous peer-to-peer environments. Motivated by the Multiple Description Coding technique, we propose a novel kindred-based approach to construct a peer-to-peer overlay topology. To achieve QoS-awareness during the streaming process, we propose a dynamic QoS-aware regulating technique which takes into account of user's preference, network bandwidth

Yuan He; Tao Gu; Jiang Guo; Jingyao Dai

2007-01-01

79

Two Dimensional Array Based Overlay Network for Balancing Load of Peer-to-Peer Live Video Streaming  

NASA Astrophysics Data System (ADS)

The live video data is streaming usually in a tree-based overlay network or in a mesh-based overlay network. In case of departure of a peer with additional upload bandwidth, the overlay network becomes very vulnerable to churn. In this paper, a two dimensional array-based overlay network is proposed for streaming the live video stream data. As there is always a peer or a live video streaming server to upload the live video stream data, so the overlay network is very stable and very robust to churn. Peers are placed according to their upload and download bandwidth, which enhances the balance of load and performance. The overlay network utilizes the additional upload bandwidth of peers to minimize chunk delivery delay and to maximize balance of load. The procedure, which is used for distributing the additional upload bandwidth of the peers, distributes the additional upload bandwidth to the heterogeneous strength peers in a fair treat distribution approach and to the homogeneous strength peers in a uniform distribution approach. The proposed overlay network has been simulated by Qualnet from Scalable Network Technologies and results are presented in this paper.

Faruq Ibn Ibrahimy, Abdullah; Rafiqul, Islam Md; Anwar, Farhat; Ibn Ibrahimy, Muhammad

2013-12-01

80

PATTERN-PUSH: A LOW-DELAY MESH-PUSH SCHEDULING FOR LIVE PEER-TO-PEER STREAMING  

E-print Network

, CA 95134 USA ABSTRACT In live peer-to-peer (P2P) streaming, each peer (child) has a num- ber at the child. It is chal- lenging to develop a scheduling algorithm that achieves low delay given heterogeneous not require continuous buffermap advertisements from the parents, and operates on the packet level instead

Chan, Shueng-Han Gary

81

BEAM: A Peer-to-Peer Framework for Live Media Streaming  

Microsoft Academic Search

Peer-to-Peer (P2P) media streaming has emerged as a scalable method for content distribution in recent years. While recent measure- ment studies have shown the effectiveness of P2P network in media streaming, there have been questions raised about the Quality of Ser- vice (QoS), reliability of streaming services and sub optimal uplink utilization in particular. P2P streaming systems are inherently less

Darshan Purandare; Ratan Guha

82

An Alliance Based Peering Scheme for P2P Live Media Streaming  

Microsoft Academic Search

While recent measurement studies have shown the ef- fectiveness of P2P network in media streaming, there have been questions raised about the Quality of Service (QoS), reliability of streaming services and sub optimal uplink utilization in partic- ular. P2P streaming systems are inherently less reliable because of churn, internet dynamics, node heterogeneity and randomness in the swarm. We present a

Darshan Purandare; Ratan K. Guha

2007-01-01

83

AQCS: Adaptive Queue-Based Chunk Scheduling for P2P Live Streaming  

Microsoft Academic Search

P2P streaming has been popular and is expected to attract even more users. The challenges for P2P streaming have been on its scalability and video viewing quality. Both require efficient utilization of resources in P2P networks. This pap er proposes an adaptive queue-based chunk scheduling method. The proposed scheme can achieve high bandwidth utilization and optimal streaming rate possible in

Yang Guo; Chao Liang; Yong Liu

2008-01-01

84

Archies: an end-to-end architecture for adaptive live MPEG4 video streaming over wireless networks  

Microsoft Academic Search

The main contribution of this paper is the design and implementation of Archies, a generic and open end-to-end architecture for adaptive streaming of live MPEG-4 video over last hop wireless networks. The distinguishing features of our architecture include support for end-to-end source rate adaptation, feedback control from the client and end-to-end packet loss differentiation. We also present a prototype implementation

Rakesh Kothari; Aura Ganz

2005-01-01

85

2PMP: A push-pull with buffer-map prediction algorithm for peer to peer live streaming  

Microsoft Academic Search

Push-pull approaches for peer-to-peer live streaming systems have gained tremendous popularity due to their high scalability and low latency. However, such approaches rely on buffer-map information of all neighbors to determine which piece to push and which peer to pull. Therefore, those approaches incur significant overhead in order to maintain the up-to-date buffer-maps of all neighbors. In this paper, we

Prateep Puttrapornpisut; Supasate Choochaisri; Kwanjira Narkdej; Chalermek Intanagonwiwat; Kultida Rojviboonchai

2011-01-01

86

Monitoring of mesh-pull P2P live media streaming system with random walk based sampling  

Microsoft Academic Search

Mesh-pull based P2P live media streaming system has gained a lot of interests and successes, and collecting key metrics in time from millions of peers to monitor the system level quality is very important for its successful commercial deployment. But the real-time monitoring still faces great technology obstacles, especially considering the dynamic and large-scale scenario which is very common in

Bo Wen; Feng Liu; Luoming Meng; Honghui Li; Zhen Liu

2008-01-01

87

Exploring a QoS driven scheduling approach for peer-to-peer live streaming systems with network coding.  

PubMed

Most large-scale peer-to-peer (P2P) live streaming systems use mesh to organize peers and leverage pull scheduling to transmit packets for providing robustness in dynamic environment. The pull scheduling brings large packet delay. Network coding makes the push scheduling feasible in mesh P2P live streaming and improves the efficiency. However, it may also introduce some extra delays and coding computational overhead. To improve the packet delay, streaming quality, and coding overhead, in this paper are as follows. we propose a QoS driven push scheduling approach. The main contributions of this paper are: (i) We introduce a new network coding method to increase the content diversity and reduce the complexity of scheduling; (ii) we formulate the push scheduling as an optimization problem and transform it to a min-cost flow problem for solving it in polynomial time; (iii) we propose a push scheduling algorithm to reduce the coding overhead and do extensive experiments to validate the effectiveness of our approach. Compared with previous approaches, the simulation results demonstrate that packet delay, continuity index, and coding ratio of our system can be significantly improved, especially in dynamic environments. PMID:25114968

Cui, Laizhong; Lu, Nan; Chen, Fu

2014-01-01

88

UNV_v2.0: Content Centric Live Video Streaming Grigorios Stathis, George Smart, Obada Sawalha, Lorenzo Levrini, Hans Balgobin, Stelios Vitorakis  

E-print Network

is low-delay live capturing and streaming over IP, with a choice of codecs and protocols to use the last year alone, Google, Microsoft, Facebook, as well as several major Internet Service Providers for streaming via multiple ports for content-driven or traffic-driven prioritization [4]; · optional use of MKV

Haddadi, Hamed

89

iPhone 3GS Forensics: Logical analysis using Apple iTunes Backup Utility  

E-print Network

Abstract- The iPhone mobile is used worldwide due to its enhanced computing capabilities, increased storage capacity as well as its attractive touch interface. These characteristics made the iPhone a popular smart phone device. The increased use of the iPhone lead it to become a potential source of digital evidence in criminal investigations. Therefore, iPhone forensics turned into an essential practice for forensic and security practitioners today. This research aimed at investigating and examining the logical backup acquisition of the iPhone 3GS mobile device using the Apple iTunes backup utility. It was found that significant data of forensic value such as e-mail messages, text and multimedia messages, calendar events, browsing history, GPRS locations, contacts, call history and voicemail recording can be retrieved using this method of iPhone acquisition.

Mona Bader; Ibrahim Baggili

90

Network coding efficiency in live video streaming over Peer-to-Peer Mesh networks  

Microsoft Academic Search

In the recent years, video and audio streaming have been very popular in the Internet and accounts for excessive traffic not only in the Internet, but also in many private networks. Transferring this amount of traffic needs both reliable and high performance infrastructure as well as efficient approaches to increase bandwidth utilization. Real-time playback deadline and robustness under high peer

Behrang Barekatain; Mohd Aizaini bin Maarof

2011-01-01

91

Topology Construction and Resource Allocation in P2P Live Streaming  

Microsoft Academic Search

\\u000a We identify inefficient network topologies and resource allocation mechanisms to be the key obstacles toward adopting present\\u000a P2P systems as the platform of choice for delivering high-quality live multimedia content. To this end, we propose a comprehensive\\u000a optimization framework that overcomes these challenges in a systematic manner. In particular, we design a delay-based network\\u000a construction procedure that creates small-world topologies

Jacob Chakareski

2010-01-01

92

Learner Outcomes and Satisfaction: A Comparison of Live Video-Streamed Instruction, Satellite Broadcast Instruction, and Face-to-Face Instruction  

ERIC Educational Resources Information Center

This study examined the final grade and satisfaction level differences among students taking specific courses using three different methods: face-to-face in class, via satellite broadcasting at remote sites, and via live video-streaming at home or at work. In each case, the same course was taught by the same instructor in all three delivery

Abdous, M'hammed; Yoshimura, Miki

2010-01-01

93

Sync iPhone contacts with Google contacts (for Windows) Using iTunes, sync the iPhone contacts with Outlook.  

E-print Network

Sync iPhone contacts with Google contacts (for Windows) Using iTunes, sync the iPhone contacts Outlook. Use the documented Outlook export / Google import process from http://oit.williams.edu/goinggoogle/googleguides/ Set your iPhone to sync contacts with Google by making it the default account for contacts. If you

Aalberts, Daniel P.

94

END USER LICENCE AGREEMENT iTUNES STORE, APPLE APP STORE AND iBOOKSTORE ("APPLE iSTORE") DOWNLOADS OF THE JAMES COOK UNIVERSITY MOBILE APP  

E-print Network

1 END USER LICENCE AGREEMENT ­ iTUNES STORE, APPLE APP STORE AND iBOOKSTORE ("APPLE i and JCU only. Apple Inc. is not a party to this Agreement. JCU, and not Apple Inc., is solely responsible or control that runs the iOS operating system software provided by Apple Inc. ("Device"); (b) for Your own

95

iPhone social networking for evidence investigations using iTunes forensics  

Microsoft Academic Search

The smart phone, like a small computer, providing not only the functions of normal phones and wireless Internet access, but also all kinds of application tools, serves as a platform of the sources of real-time information, information sharing and information exchange in our daily lives. As a result, the extract the crucial digital evidence in the smart phone, it has

Yu-Cheng Tso; Shiuh-Jeng Wang; Cheng-Ta Huang; Wei-Jen Wang

2012-01-01

96

CLive: Cloud-Assisted P2P Live Streaming Amir H. Payberah, Hanna Kavalionak, Vimalkumar Kumaresan, Alberto Montresor, Seif Haridi  

E-print Network

as a Service) cloud provider, e.g., Amazon AWS. Considering the capacity and the cost of helpers, the problem, Alberto Montresor, Seif Haridi Swedish Institute of Computer Science (SICS), Sweden University of Trento, Italy {amir,seif}@sics.se {name.family}@unitn.it Abstract--Peer-to-peer (P2P) video streaming

Montresor, Alberto

97

Streaming Media Mark D. Hendricks  

E-print Network

Streaming Media Production Mark D. Hendricks ideas. actions. results. #12;Why stream? §Take your ­ Definitions §IP Streaming ­ (what Ed Media does) streaming over an Internet connection §Live source is a software or hardware encoder sending media stream to server for distribution (on-demand source = file) §Can

Farritor, Shane

98

StreamWorks: the live and on-demand audio/video server and its applications in medical information systems  

NASA Astrophysics Data System (ADS)

Facing a world undergoing fundamental and rapid change, healthcare organizations are seeking ways to increase innovation, quality, productivity, and patient value, keys to more effective care. Individual clinics acting alone can respond in only a limited way, so re- engineering the process key which services are delivered demands real-time collaborative technology that provides immediate information sharing, improving the management and coordination of information in cross-functional teams. StreamWorks is a development stage architecture that uses a distribution technique to deliver an advanced information management system for telemedicine. The challenge of StreamWorks in telemedicine is to enable equity of the quality of Health Care of Telecommunications and Information Technology also to patients in less favored regions, like India or China, where the quality of medical care varies greatly by region, but where there are some very current communications facilities.

Akrout, Nabil M.; Gordon, Howard; Palisson, Patrice M.; Prost, Remy; Goutte, Robert

1996-05-01

99

MATIN: a random network coding based framework for high quality peer-to-peer live video streaming.  

PubMed

In recent years, Random Network Coding (RNC) has emerged as a promising solution for efficient Peer-to-Peer (P2P) video multicasting over the Internet. This probably refers to this fact that RNC noticeably increases the error resiliency and throughput of the network. However, high transmission overhead arising from sending large coefficients vector as header has been the most important challenge of the RNC. Moreover, due to employing the Gauss-Jordan elimination method, considerable computational complexity can be imposed on peers in decoding the encoded blocks and checking linear dependency among the coefficients vectors. In order to address these challenges, this study introduces MATIN which is a random network coding based framework for efficient P2P video streaming. The MATIN includes a novel coefficients matrix generation method so that there is no linear dependency in the generated coefficients matrix. Using the proposed framework, each peer encapsulates one instead of n coefficients entries into the generated encoded packet which results in very low transmission overhead. It is also possible to obtain the inverted coefficients matrix using a bit number of simple arithmetic operations. In this regard, peers sustain very low computational complexities. As a result, the MATIN permits random network coding to be more efficient in P2P video streaming systems. The results obtained from simulation using OMNET++ show that it substantially outperforms the RNC which uses the Gauss-Jordan elimination method by providing better video quality on peers in terms of the four important performance metrics including video distortion, dependency distortion, End-to-End delay and Initial Startup delay. PMID:23940530

Barekatain, Behrang; Khezrimotlagh, Dariush; Aizaini Maarof, Mohd; Ghaeini, Hamid Reza; Salleh, Shaharuddin; Quintana, Alfonso Ariza; Akbari, Behzad; Cabrera, Alicia Trivio

2013-01-01

100

MATIN: A Random Network Coding Based Framework for High Quality Peer-to-Peer Live Video Streaming  

PubMed Central

In recent years, Random Network Coding (RNC) has emerged as a promising solution for efficient Peer-to-Peer (P2P) video multicasting over the Internet. This probably refers to this fact that RNC noticeably increases the error resiliency and throughput of the network. However, high transmission overhead arising from sending large coefficients vector as header has been the most important challenge of the RNC. Moreover, due to employing the Gauss-Jordan elimination method, considerable computational complexity can be imposed on peers in decoding the encoded blocks and checking linear dependency among the coefficients vectors. In order to address these challenges, this study introduces MATIN which is a random network coding based framework for efficient P2P video streaming. The MATIN includes a novel coefficients matrix generation method so that there is no linear dependency in the generated coefficients matrix. Using the proposed framework, each peer encapsulates one instead of n coefficients entries into the generated encoded packet which results in very low transmission overhead. It is also possible to obtain the inverted coefficients matrix using a bit number of simple arithmetic operations. In this regard, peers sustain very low computational complexities. As a result, the MATIN permits random network coding to be more efficient in P2P video streaming systems. The results obtained from simulation using OMNET++ show that it substantially outperforms the RNC which uses the Gauss-Jordan elimination method by providing better video quality on peers in terms of the four important performance metrics including video distortion, dependency distortion, End-to-End delay and Initial Startup delay. PMID:23940530

Barekatain, Behrang; Khezrimotlagh, Dariush; Aizaini Maarof, Mohd; Ghaeini, Hamid Reza; Salleh, Shaharuddin; Quintana, Alfonso Ariza; Akbari, Behzad; Cabrera, Alicia Trivino

2013-01-01

101

FPGA-based real-time swept-source OCT systems for B-scan live-streaming or volumetric imaging  

NASA Astrophysics Data System (ADS)

We have developed a Swept-Source Optical Coherence Tomography (Ss-OCT) system with high-speed, real-time signal processing on a commercially available Data-Acquisition (DAQ) board with a Field-Programmable Gate Array (FPGA). The Ss-OCT system simultaneously acquires OCT and k-clock reference signals at 500MS/s. From the k-clock signal of each A-scan we extract a remap vector for the k-space linearization of the OCT signal. The linear but oversampled interpolation is followed by a 2048-point FFT, additional auxiliary computations, and a data transfer to a host computer for real-time, live-streaming of B-scan or volumetric C-scan OCT visualization. We achieve a 100 kHz A-scan rate by parallelization of our hardware algorithms, which run on standard and affordable, commercially available DAQ boards. Our main development tool for signal analysis as well as for hardware synthesis is MATLAB with add-on toolboxes and 3rd-party tools.

Bandi, Vinzenz; Goette, Josef; Jacomet, Marcel; von Niederhusern, Tim; Bachmann, Adrian H.; Duelk, Marcus

102

Science Oxford Live  

NSDL National Science Digital Library

The first things visitors will see when visiting the Science Oxford Live website are a few shots from the Wildlife Photographer of the Year exhibit that will soon be at the brick and mortar location of Science Oxford Live. It's hard to decide which is cuter: the hippo, the monkey, or the giraffe's tail. Visitors will certainly want to check out the video podcasts available through iTunes, and even may even subscribe to the podcasts to receive the latest episodes. These webcasts, found under the Watch Us tab, are recordings of live events that took place at Science Oxford Live. They cover topics such as Parkinson's disease, the sleep versus wake balance, the science and history of chocolate, the curse of consciousness, and how "doctors and other health professionals sometimes do more harm than good to patients, despite acting with the best of intentions." The Discovery Zone is a place for kids which is best experienced in person, but online it still has valuable lessons to teach, and it's worth a look.

2012-02-10

103

Truthful Streaming in Selfish DONet  

Microsoft Academic Search

Data-driven overlay network (DONet) is especially suitable for live stream because it can tolerant node dynamics well. However, optimal streaming demands the cooperation of individual nodes. If selfish nodes in DONet cheat about their buffer maps to reduce the forwarding burden, the overall streaming quality might be negatively affected. To defend this kind of cheating behavior, we design a trustworthy

Dan Li; Jianping Wu; Yong Cui

2007-01-01

104

NDSSL Technical Report 10-087 Title: On Minimizing Average End-to-End Delay in P2P Live Streaming  

E-print Network

latency, which discourages commercial IPTV deployment from the ISP end. Moreover, ISP may provide viewers streaming applica- tions have exhibited growing popularity, such as IPTV, VOIP, and video conferencing deployment of P2P systems. For example, IPTV deployment from commercial service providers is far below

Khan, Maleq

105

Stream Morphometry, Stream Flow, Stream Competence  

NSDL National Science Digital Library

This exercise combines field activities (i.e., topographic survey of a point bar; sediment sampling with a soil auger), laboratory analysis (i.e., particle size analysis of fluvial sediments), topographic map interpretation, and problem solving exercises. Key words: point bar, fluvial sediments, topographic surveying, particle size analysis, stream morphometry, stream discharge, stream flow competence

Aitken, Alec

106

Compression Algorithms for Audio-Video Streaming  

Microsoft Academic Search

Live audio-video streaming has become popular over the years especially when it comes to communication between people living huge geographical areas apart and at a very cheap rate or even free. However, when it comes to places where bandwidth is low or limited, smooth streaming has become a serious challenge because after all bandwidth is a natural resource and is

Tarif Riyad Rahman; Miftahur Rahman

2010-01-01

107

Gulf Stream  

NSDL National Science Digital Library

In-depth website by researchers describes the Gulf Stream, its place in the North Atlantic Gyre, influence on weather and climate, and role of eddies and rings in distributing heat and salinity. A history, 16th to 20th centuries, describes scientists' developing understanding of the Gulf Stream and evolution of oceanographic instruments used to study it, with special details on satellite observations. Also covered: the importance of oceanography and the Gulf Stream to naval applications.

108

Stream Surveying  

NSDL National Science Digital Library

The class breaks into groups of 3-4. Each week we go out to the same stream channel, and perform the stream survey activities in the USFS Harrelson document, one chapter per week. After the snow flies, collected data are used to calculate channel hydrologic and hydraulic data such as bankfull flow and critical shear stress. Designed for a geomorphology course

Williams, Karen

109

Stream Processors  

NASA Astrophysics Data System (ADS)

Stream processors, like other multi core architectures partition their functional units and storage into multiple processing elements. In contrast to typical architectures, which contain symmetric general-purpose cores and a cache hierarchy, stream processors have a significantly leaner design. Stream processors are specifically designed for the stream execution model, in which applications have large amounts of explicit parallel computation, structured and predictable control, and memory accesses that can be performed at a coarse granularity. Applications in the streaming model are expressed in a gather-compute-scatter form, yielding programs with explicit control over transferring data to and from on-chip memory. Relying on these characteristics, which are common to many media processing and scientific computing applications, stream architectures redefine the boundary between software and hardware responsibilities with software bearing much of the complexity required to manage concurrency, locality, and latency tolerance. Thus, stream processors have minimal control consisting of fetching medium- and coarse-grained instructions and executing them directly on the many ALUs. Moreover, the on-chip storage hierarchy of stream processors is under explicit software control, as is all communication, eliminating the need for complex reactive hardware mechanisms.

Erez, Mattan; Dally, William J.

110

CONNECTICUT STREAMS  

EPA Science Inventory

This is a 1:24,000-scale datalayer of named streams in Connecticut. It includes two Shapefiles with line and polygon features. Both Shapefiles should be used together. The polygon shapefile fills in open water streams such as the Connecticut River as well as Long Island Sound. T...

111

Living Non-Living  

NSDL National Science Digital Library

Fill out your worksheet as you learn more about living and non-living things. 1. First take this pretest to test your knowledge of living and non living things.Beginning Quiz 2. So, you know what is alive and what is not. But why are those things alive or not? Read the information on this site to learn the 7 characteristics that make things ...

Benson, Mrs.

2010-02-23

112

Acoustic Streaming  

NASA Astrophysics Data System (ADS)

In this paper we discuss two types of acoustic streaming, to which Lighthill (1978a,b, 1997) has made significant contributions, namely the ``quartz wind'' and Rayleigh streaming. Both are associated with flows that are dominated by their fluctuating components, and owe their origin to the action of Reynolds stresses. In the former, these stresses arise within the main body of the fluid when an ultrasonic beam propagates into it; in the latter they act in the Stokes shear-wave layer that forms at a solid boundary in a fluctuating flow. In spite of its acoustic origins, we show that streaming of the Rayleigh type is a phenomenon that occurs more widely than those origins suggest.

Riley, N.

113

TextPool: Visualizing Live Text Streams  

Microsoft Academic Search

In today's fast-paced world it is becoming increasingly difficult to stay abreast of the public discourse. With the advent of hundreds of closed-captioned cable channels and internet-based channels such as news feeds, blogs, or email, knowing the \\

Conrad Albrecht-Buehler; Benjamin Watson; David A. Shamma

2004-01-01

114

Language design for distributed stream processing  

E-print Network

Applications that combine live data streams with embedded, parallel, and distributed processing are becoming more commonplace. WaveScript is a domain-specific language that brings high-level, type-safe, garbage-collected ...

Newton, Ryan Rhodes, 1980-

2009-01-01

115

Living Longer, Living Better  

E-print Network

Living Longer, Living Better ­ Functional Longevity Our mission is to promote long, healthy.azgec.arizona.edu - Arizona Reynolds Program of Applied Geriatrics: www.reynolds.med.arizona.edu - UA Studies on Aging Program with conference planning; provide technical support, including needs assessment and evaluation; and offer monthly

Arizona, University of

116

Stream Table  

NSDL National Science Digital Library

In this activity, learners use aluminum trays and wooden blocks to form stream tables to investigate river formations in two different landscape scenarios. Learners compare and contrast how the formation of the river differs if the topography of the land is changed from a flat plain to a terrain with hills and valleys.

Friday, Science

2010-01-01

117

Jet Streams  

NSDL National Science Digital Library

This module describes the general characteristics of upper-level jet streams (Polar Jet, Subtropical Jet, and Tropical Easterly Jet) and two major tropical low-level wind maxima (Somali Jet, African Easterly Jet). Included are discussions of their formation, maintenance, influence on synoptic weather, and role in the general circulation.

Comet

2012-11-13

118

Stream Studies.  

ERIC Educational Resources Information Center

Outlines a science curriculum reform effort aimed at enabling students to collect original data concerning an environmental parameter such as water quality on a yearly basis. Students track the overall health of the stream by analyzing both biotic and abiotic factors. (DDR)

Stein, Scott

1997-01-01

119

Assisted Living  

MedlinePLUS

... Bar Home Current Issue Past Issues Feature: Senior Living Assisted Living Past Issues / Summer 2009 Table of Contents For ... t need round-the-clock nursing care. Assisted living facilities provide an alternative. Assisted living is for ...

120

Cache-and-Relay Streaming Media Delivery for Asynchronous Clients  

E-print Network

-world networks, as well as over large real router-level Internet maps. 1. INTRODUCTION The delivery of streaming to clients), as well as for requests to buffered live streams (e.g., playout of a webcast to a large numberCache-and-Relay Streaming Media Delivery for Asynchronous Clients Shudong Jin Computer Science

121

CacheandRelay Streaming Media Delivery for Asynchronous Clients #  

E-print Network

­world networks, as well as over large real router­level Internet maps. 1. INTRODUCTION The delivery of streaming to clients), as well as for requests to buffered live streams (e.g., playout of a webcast to a large numberCache­and­Relay Streaming Media Delivery for Asynchronous Clients # Shudong Jin Computer Science

122

Cache-and-Relay Streaming Media Delivery for Asynchronous Clients  

E-print Network

-world networks, as well as over large real router-level Internet maps. 1. INTRODUCTION The delivery of streaming or news briefs to clients), as well as for requests to buffered live streams (e.g., playout of a webcastCache-and-Relay Streaming Media Delivery for Asynchronous Clients Shudong Jin Computer Science

Bestavros, Azer

123

NAP: An Agent-based Scheme on Reducing Churn-Induced Delays for P2P Live Peer-to-peer (P2P) multimedia streaming provides a scal-  

E-print Network

-to-peer (P2P) multimedia streaming provides a scal- able solution for IPTV. However, delays from channel, and playback lag are hindering the extensive com- mercial deployment of P2P systems [3]. For example, IPTV

Khan, Maleq

124

Comparison of Tools for Data Mining and Retrieval in High Volume Data Stream  

Microsoft Academic Search

Applications querying real time data streams in order to identify trends, patterns, or anomalies can often benefit from comparing the live stream data with archived historical stream data. This is especially true for applications involving live & unpredictable data like in traffic analysis & stock markets. However this data mining in DSMSs have turned out to be a costly proposition.

Mohammed A Qadeer; Nadeem Akhtar; Faraz Khan

2009-01-01

125

Understanding the Performance Gap between Pull-based Mesh Streaming Protocols  

E-print Network

delays. I. INTRODUCTION Live peer-to-peer (P2P) streaming has recently witnessed unprecedented growth on the Internet, delivering live stream- ing content to millions of users at any given time. The es- sential exchanges segment availability information of streaming buffers (often referred to as buffer maps) with its

Li, Baochun

126

Living Longer, Healthier Lives  

Microsoft Academic Search

Contrary to popular images that portray a bleak future, important life tasks and accomplishments characterize the lives of\\u000a older women. Midlife women are more likely than not to work full-time, and some will earn the highest salaries of their careers.\\u000a A high percentage of women in public service or elected office are in their 50s and 60s. Bernadine Healy was

Susan D. Lonborg; Cheryl B. Travis

127

Scheduling and Optimizing Stream Programs on Multicore Machines by Exploiting High-Level  

E-print Network

of HD movies and TV via YouTube, Netflix, Apple TV and Xbox Live is gaining popularity. Stream programs that the modularity and static attributes of stream programs' abstraction not only help map stream programsScheduling and Optimizing Stream Programs on Multicore Machines by Exploiting High

128

Methodologies for generating HTTP streaming video workloads to evaluate web server performance  

Microsoft Academic Search

Recent increases in live and on-demand video streaming have dramatically changed the Internet landscape. In North America, Netflix alone accounts for 28% of all and 33% of peak downstream Internet traffic on fixed access links, with further rapid growth expected [26]. This increase in streaming traffic coincides with the steady adoption of HTTP for use in video streaming. Many streaming

Jim Summers; Tim Brecht; Derek Eager; Bernard Wong

2012-01-01

129

Streams and Drainage Systems  

NSDL National Science Digital Library

This page introduces streams and channels and describes the geometry and dynamics of stream channels, including cross sectional shape, discharge, long profiles, base level, laminar and turbulent flow, the load of the stream, and floods. The site explains channel patterns, including straight, meandering and braided channels; erosion by streams; stream deposits, including floodplains and levees, terraces, alluvial fans, and deltas; and drainage systems, including drainage basins and divides, stream order, drainage patterns and continental divides.

Nelson, Stephen

130

The Stream Study  

NSDL National Science Digital Library

The Stream Study provides a method to determine the water quality of a stream based on the collection and identification of stream-bottom macroinvertebrates. This is a multi-chapter activity designed for teachers, parents, and students. Specific sections of this site include the following: why it is important to study stream-bottom macroinvertebrates, identification of stream-bottom macroinvertebrates, collection and interpretation of data, and a glossary of terms used in the stream study.

Webb, Rick

1999-03-01

131

Living Vs. Non-Living  

NSDL National Science Digital Library

Fill out your worksheet as you learn more about living and non-living things. 1. First mouse over the objects to see some of the characteristics of living and non living things.Living Nonliving Characteristics 2. So, you know what is alive and what is not. But why are those things alive or not? Read the information on this site to learn the 7 characteristics that make things ...

Benson, Carrie

2012-10-08

132

Inside the Jet Stream  

NSDL National Science Digital Library

The jet stream is a complex phenomenon involving the interplay between many variables. This resource provides a variety of materials, including Giving Rise to the Jet Stream, which is a simplified introduction that shows what generates the jet stream and why it flows from west to east. The site also contains a five-day view of the jet stream, which is a realistic depiction of how the jet stream flows; a page that provides some answers to frequently asked questions about the jet stream; and a glossary of terms used in the Giving Rise to the Jet Stream feature.

Groleau, Rick

133

Case Study of Live View System using Union-Camera  

Microsoft Academic Search

Multimedia communications such as video streaming have been used recently. Seeing the video from cameras located at strage place for people is one of ways of using for streaming. In keeping with this situation, we had a demonstration of live streaming between Korea Advanced Institute of Science and Technology (KAIST) and Kyushu University. We set cameras at Fukuoka Tower that

Hiroto HARADA; Koji OKAMURA

134

Conversational Shadows: Describing Live Media Events Using Short Messages  

Microsoft Academic Search

Microblogging concurrently with live media events is becom- ing commonplace. The resulting comment stream represents a parallel, social conversational reflection on the event. Al- though not formally 'attached' to the actual event stream it- self, we demonstrate it is possible to establish a relationship between the two streams by mapping their structural proper- ties. In this article, we examine: How

David A. Shamma; Lyndon Kennedy; Elizabeth F. Churchill

2010-01-01

135

Lively Science  

NSDL National Science Digital Library

Maintaining living things in a classroom requires knowledge and preparation. It also requires the proper equipment and space. There are two primary goals in the study of living things: first, we want our students to respect life, and second, we want them to appreciate its complexity in nature. Observing healthy living things in school accomplishes both goals. This chapter describes the appropriate precautions that should be taken into consideration when bringing living organisms into classrooms.

Texley, Juliana; Kwan, Terry

2002-01-01

136

Ecology of Streams and Mountains  

NSDL National Science Digital Library

This tutorial provides an introduction to the ecology of streams and mountains. It discusses how trees falling into a mountain stream can provide habitat by creating logjams, even going so far as to float to the sea during spring floods, where they provide cover for ocean fish. There is also a description of alpine ecosystems, those which exist above the tree line, and the animals that live or visit there, and a discussion of the idea of structure and function as it pertains to organisms as diverse as elephants and fungi. A section on soil ecology describes the relationship between mushrooms, the soil, and other organisms such as trees. A quiz and glossary are also provided.

137

Enriching Viewer Options in P2P Media Streaming Applications  

Microsoft Academic Search

Peer-to-Peer (P2P) media streaming applications are in- creasingly popular on the Internet and offer a wide variety of media content, attracting potentially millions of viewers simultaneously. However, much content is duplicated, syn- chronously and asynchronously: popular Hollywood movies are often offered by many different on-demand streaming service providers; live streaming service providers distribute the same media content, for instance television

Jian Wang; Ruimin Shen; Heng Luo; Changyong Niu; Liping Shen

2009-01-01

138

Delivering Instruction via Streaming Media: A Higher Education Perspective.  

ERIC Educational Resources Information Center

Describes streaming media, an audio/video presentation that is delivered across a network so that it is viewed while being downloaded onto the user's computer, including a continuous stream of video that can be pre-recorded or live. Discusses its use for nontraditional students in higher education and reports on implementation experiences. (LRW)

Mortensen, Mark; Schlieve, Paul; Young, Jon

2000-01-01

139

Sea Surface Temperature Trends of the Gulf Stream  

NSDL National Science Digital Library

In this activity, students use NASA satellite data to explore the seasonal changes in sea surface temperatures of the Gulf Stream. Students use NASA's Live Active Server (LAS) to generate data of sea surface temperatures in the Gulf Stream, which they then graph and analyze.

Roettger, Rex; Nasa

140

Distributed Delivery System for Time-shifted Streaming Systems  

E-print Network

(IPTV, life-stream services, etc.), an attractive feature consists in allowing users to access past. I. INTRODUCTION The delivery of television over the Internet (IPTV) is expected to offer viewers new, delivery systems for IPTV can not be utilized because, contrarily to live streaming systems, time

Paris-Sud XI, Université de

141

Strategies of Conflict in Coexisting Streaming Overlays  

E-print Network

for bandwidth at the upstream peers. With extensive theoretical analysis and performance evaluation, we show be prioritized. I. INTRODUCTION Peer-to-peer streaming applications have recently become a reality to a channel of television programming or live events. Generated with a modern codec such as H.264, each

Li, Baochun

142

Distributing streaming media content using cooperative networking  

Microsoft Academic Search

In this paper, we discuss the problem of distributing streaming media content, both live and on-demand, to a large number of hosts in a scalable way. Our work is set in the context of the traditional client-server framework. Specifically, we consider the problem that arises when the server is overwhelmed by the volume of requests from its clients. As a

Venkata N. Padmanabhan; Helen J. Wang; Philip A. Chou; Kunwadee Sripanidkulchai

2002-01-01

143

ISIT 2009, Seoul, Korea, June 28 -July 3, 2009 On multicasting with streaming burst-erasure codes  

E-print Network

live streams with causal encoding and delay constrained decoding. An incoming stream of source packets at the encoder is mapped into a stream of channel packets in a causal manner - the channel packet x[i] dependsISIT 2009, Seoul, Korea, June 28 - July 3, 2009 On multicasting with streaming burst-erasure codes

Khisti, Ashish

144

River and Stream Pollution  

MedlinePLUS

... Water in streams and rivers flows into ponds, lakes, and the sea. Keeping streams and rivers clean helps keep all the water downstream clean, too. Back to Pollution Other stuff you might like... Games & Puzzles Games ...

145

Providing VoD Streaming Using P2P Networks  

NASA Astrophysics Data System (ADS)

Overlays and P2P systems, initially developed to support IP multicast and file-sharing, have moved beyond that functionality. They are also proving to be key technologies for the delivery of video streaming. Recently, there have been a number of successful deployments for "live" P2P streaming. However, the question remains open whether similar P2P technologies can be used to provide VoD (Video-On-Demand) services. A P2P VoD service is more challenging to design than a P2P live streaming system because the system should allow users arriving at arbitrary times to watch (arbitrary parts of) the video.

Pedro Muoz-Gea, Juan; Malgosa-Sanahuja, Josemaria; Manzanares-Lopez, Pilar; Carlos Sanchez-Aarnoutse, Juan

146

Rivers and Streams  

NSDL National Science Digital Library

After collecting stream flow data in the field earlier in the semester, students collect new data to compare flow variations of an on-campus stream. Students collect data in the field then calculate flow velocity, and discharge. Students also use maps to calculate stream gradient. Additional activities include plotting clast size data collected in the field on a Hjulstrom Diagram to make connections between stream flow properties and erosion-deposition-and transport in streams. This activity gives students the opportunity to collect and analyze data as they practice quantitative skills by graphing data and calculating unit conversions.

Teasdale, Rachel

147

Family Living and Personal Living  

NSDL National Science Digital Library

Find links for various projects for Family Living and Personal Living classes. FAMILY LIVING Wayne County Clerk - Marriage License The Knot Martha Stewart Weddings *Travel Planning Sites* Northwest Airlines Amtrak Travelocity Spirit Air Orbitz PERSONAL LIVING (and Parenting): *Alcohol Research* Alcohol and Public Health - CDC MedlinePlus: Alcoholism NIAAA National Institute on Alcohol Abuse and Alcoholism *Birth Control* Health and Wellness Resource Center - - start at this site by typing Birth Control in the search bar on the right of the screen and select "full text articles" and consumer heatlh. It will list a range of birth ...

Schultz, Ms.

2007-11-05

148

Stream Table Lab  

NSDL National Science Digital Library

Students work in groups around home-made stream tables. Each person in the group is assigned a role that is involved in maintaining the stream table (such as the hose-holder, the bucket-holder, the person who turns on and off the water, and the recorder). As a group, they turn on the water and observe what happens when water and sand interact on a slope. Once a stream has formed, they draw the stream, noting locations where erosion and deposition have occurred. Then, they take measurements of the stream channel and stream flow in order to calculate velocity, sinuosity, gradient, and discharge. This activity encourages students to work in groups, use math within a scientific context, and learn about how streams work in a hands-on manner.

Rutzky, Sara M.

149

Mapping the PPLive Network: Studying the Impacts of Media Streaming on P2P Overlays  

E-print Network

Mapping the PPLive Network: Studying the Impacts of Media Streaming on P2P Overlays Long Vu-based investigation of PPLive, the largest live multimedia streaming system in the world today. It is important of their conclusions may be false for p2p applications that stream media instead. Speci cally, we undertake a crawler

Nahrstedt, Klara

150

Peer-to-Peer Time-shifted Streaming Systems Yaning Liu Gwendal Simon  

E-print Network

Bretagne, France November 6, 2009 Abstract In live streaming systems (IPTV, life-stream services, etc-shifted streaming system from well-known measure- ments of VoD and IPTV systems. These overlays are the first-00430817,version1-10Nov2009 #12;IPTV, this is called the time-shifted television: clients start watching

Paris-Sud XI, Université de

151

Orca Live  

NSDL National Science Digital Library

The brainchild of orca biologist Dr. Paul Spong, this Nature Network Web site aims to "relay live sound and images of the orcas in the natural environment of Hanson Island," near Vancouver Island, Canada. Live sound and image feeds are available at 56K and 300K connections, and, by completing a simple registration, visitors will be alerted via email whenever orcas are near the cameras and mikes. Click on Highlights 2000 to see and hear past Web casts of orcas activity. This Web site links to others that relay live images and sounds from animals located around the world.

152

Is it living or non living?  

NSDL National Science Digital Library

Once completed, students will have a deeper understanding of what is living and non living. Students will be able to identify the characteristics of non living and living things and will be able to classify them in an environment. Take this pretest to test your knowlege of living and non living things.Beginning Quiz Read this to learn more about living and non living things.Living vs Non Living Things Living things need 7 characteristics of life. Click on this link to learn more about what they are.7 Characteristics of Living Things Living and non living things have different characteristics. Look ...

Aitken, Miss

2009-04-17

153

Live Well  

MedlinePLUS

... HIV, following a healthy diet offers several benefits. Physical Activity - Exercise offers benefits that can help you maintain ... Well Mental Health Substance Use Smoking Healthy Diet Physical Activity Family Planning Living with HIV: Travel Abroad Resources ...

154

Living Laboratories  

ERIC Educational Resources Information Center

Presented is a review of various methods of keeping live animals, including scorpions, spiders, crabs, crayfish, shrimp, ants, fish, mice, and birds, as well as plants as a school science project/display. (SL)

Mules, B. R.

1976-01-01

155

Assisted Living  

MedlinePLUS

... of residences participating in the research have lower fees and half have higher fees. The rental rate includes the base rent and service fees charged by the assisted living community. While 86. ...

156

Living Proof Podcast Series  

NSDL National Science Digital Library

This podcast series is part of the SUNY University at Buffalo's School of Social Work outreach efforts and is a rather fascinating and useful resource. The purpose of the series is "to engage practitioners and researchers in lifelong learning and to promote research to practice, practice to research." The conversations here include interviews with top-notch researchers, professors, and others. On this site, visitors can browse through past podcasts, which include conversations about topics like online bullying, community organizing, and developing an effective relationship with patients. Also, visitors can sign up to receive each new podcast when it is released via iTunes. Finally, users are encouraged to leave feedback on the episodes they find compelling.

2012-10-15

157

Volcano Live  

NSDL National Science Digital Library

Volcano Live contains maps of volcanoes from around the world, a kids' page that provides volcano education links for teachers and students, a volcano glossary, volcano news, links to live video cams of volcanoes, geography and volcano information of countries around the world, and video clips of active volcanoes. There is also information for travelling to volcanoes, a volcano photo section, a section on the destruction of Pompeii, a volcanology section, and volcano safety rules.

Seach, John

158

The Stream Study  

NSDL National Science Digital Library

Based on material developed by the Save Our Streams program (Izaak Walton League of America), this educational resource on streams is provided by the University of Virginia at Charlotteville. The Stream Study homepage is an online guide for determining the water quality of streams, based on collecting and identifying stream-bottom macroinvertebrates (e.g., crayfish, mussels, and larvae of aquatic insects). The resource includes an illustrated identification key for "common stream-bottom macroinvertebrates;" a classification of macroinvertebrates based on sensitivity to "pollution;" practice samples (to test your recently acquired knowledge); a glossary of terms; sampling procedures and forms; and links to additional information. Although the classification scheme presented here (re. pollution sensitivity) raises skepticism among some scientists, the resource is still worthwhile. Educators could use this information to create lab exercises, raise interesting points of discussion, and guide users through hands-on field/ lab experiences.

159

Gas stream purifier  

NASA Technical Reports Server (NTRS)

A gas stream purifier has been developed that is capable of removing corrosive acid, base, solvent, organic, inorganic, and water vapors as well as particulates from an inert mixed gas stream using only solid scrubbing agents. This small, lightweight purifier has demonstrated the ability to remove contaminants from an inert gas stream with a greater than 99 percent removal efficiency. The Gas Stream Purifier has outstanding market and sales potential in manufacturing, laboratory and science industries, medical, automotive, or any commercial industry where pollution, contamination, or gas stream purification is a concern. The purifier was developed under NASA contract NAS9-18200 Schedule A for use in the international Space Station. A patent application for the Gas Stream Purifier is currently on file with the United States Patent and Trademark Office.

Adam, Steven J.

1994-01-01

160

Dynamics of meteor streams  

NASA Technical Reports Server (NTRS)

The overwhelming majority of meteor streams are generally assumed to be formed due to the decay of comets. The most effective process of the release of solid particles from a cometary nucleus is their ejection by sublimating gases when the comet approaches the Sun. The results of investigation of the Geminids and Quadrantids meteor stream evolution show that under the influence of planetary perturbations, the stream may originally be flat but then thicken depending on the variation range of orbital inclinations. Eventually, due to planetary perturbations, a meteor stream may take such a shape as to cause the start of several active showers at different solar longitudes.

Babadjanov, P. B.; Obrubov, Yu. U.

1987-01-01

161

Positive Lives  

NSDL National Science Digital Library

The Positive Lives project is "a unique international project that photographs and documents the social and emotional impact of the global HIV/AIDS epidemic, illuminating positive human responses to this world crisis." Sponsored by the Levi Strauss Foundation and the Terrence Higgins Trust, the project has sponsored photographers from across the world to photograph various persons living with HIV/AIDS in a host of very different settings. While the project has sponsored a number of various photographic exhibits, this online collection represents a small portion of the work thus far. Using an interactive map of the world, users can click on different geographic areas to view photographic exhibits documenting the lived experience of this condition. In South Africa, visitors can learn about the work and the residents of Nazareth House, which is a children's home in Cape Town taking care of abandoned children with HIV or AIDS. In Edinburgh, visitors are taken through the lives of young drug abusers at the Muirhouse Estate who are also living with either HIV or AIDS. In the words of photographer John Sturrock, "In Muirhouse I witnessed the emotional struggle of people enduring a tragedy..." However, hope is present in these photographic essays as well, as they represent a broad range of emotions.

162

Living and Non-living things  

NSDL National Science Digital Library

This lesson is intended to help students understand the difference between living and non-living things by teaching them the characteristics of living things. Introduction: We know what living things are, right? People are living things, aren't they? Can you think of any other living things? How do you know they are living? Task: If you were asked to explain what the difference between living and non-living things, how would you? This ...

Davies, Mrs.

2010-02-11

163

The many streams of the Magellanic Stream  

E-print Network

We present results from neutral hydrogen (HI) observations of the tip of the Magellanic Stream (MS), obtained with the Arecibo telescope as a part of the on-going survey by the Consortium for Galactic studies with the Arecibo L-band Feed Array. We find four large-scale, coherent HI streams, extending continously over a length of 20 degrees, each stream possessing different morphology and velocity gradients. The newly discovered streams provide strong support for the tidal model of the MS formation by Connors et al. (2006), which suggested a spatial and kinematic bifurcation of the MS. The observed morphology and kinematics suggest that three of these streams could be interpreted as a 3-way splitting of the main MS filament, while the fourth stream appears much younger and may have originated from the Magellanic Bridge. We find an extensive population of HI clouds at the tip of the MS. Two thirds of clouds have an angular size in the range 3.5'--10'. We interpret this as being due to thermal instability, which would affect a warm tail of gas trailing through the Galactic halo over a characteristic timescale of a few Myrs to a few hundred Myrs. We show that thermal fragments can survive in the hot halo for a long time, especially if surrounded by a <10^6 K halo gas. If the observed clumpy structure is mainly due to thermal instability, then the tip of the MS is at a distance of ~70 kpc. A significant fraction of HI clouds at the tip of the MS show multi-phase velocity profiles, indicating the co-existence of cooler and warmer gas.

Snezana Stanimirovic; Samantha Hoffman; Carl Heiles; Kevin A. Douglas; Mary Putman; Joshua E. G. Peek

2008-02-10

164

Talented Streams Implementation  

E-print Network

Talented Streams Implementation Bachelor's thesis, supplementary documentation at the Software the implementation of scoped talents, talent templates and talented streams. It makes it possible to work. i #12;Contents 1 Introduction 1 2 Scoped Talents 1 2.1 Talent Templates

Nierstrasz, Oscar

165

Streaming Audio Recorder  

NSDL National Science Digital Library

The Streaming Audio Recorder application allows users to record any type of streaming audio via their computers' speakers or microphone. It's a simple way to record audio from sites such as Grooveshark, YouTube, BBC, and others. The program is compatible with computers running Windows 2000 and newer.

2012-11-02

166

Stream Barrier December 2007  

E-print Network

inset photos (clockwise from top left): Dam removal in progress. NOAA A low-head dam in the GulfStream Barrier Removal Monitoring Guide December 2007 #12;#12;Stream Barrier Removal Monitoring Removal Monitoring Workshop Contributors Gulf of Maine Council on the Marine Environment National Oceanic

167

WADEABLE STREAMS ASSESSMENT  

EPA Science Inventory

This Wadeable Streams Assessment (WSA) provides the first statistically defensible summary of the condition of the nation?s streams and small rivers, which are so integrally tied to our history. This report brings the results of this ground-breaking study to the American public....

168

MARYLAND BIOLOGICAL STREAM SURVEY  

EPA Science Inventory

The Maryland Biological Stream Survey (MBSS) is a multi-year probability-based sampling program designed to assess the status of biological resources in non-tidal streams of Maryland. The MBSS is quantifying the extent to which acidic deposition and other human activities have af...

169

Efficient streaming text clustering  

Microsoft Academic Search

Clustering data streams has been a new research topic, recently emerged from many real data mining applications, and has attracted a lot of research attention. However, there is little work on clustering high-dimensional streaming text data. This paper combines an efficient online spherical k-me ans (OSKM) algorithm with an existing scalable clustering strategy to achieve fast and adaptive clustering of

Shi Zhong

2005-01-01

170

STREAM NETWORK TEMPERATURE  

EPA Science Inventory

The Stream Network Temperature (SNTEMP) model is a mechanistic, one-dimensional heat transport formulation that predicts daily mean and maximum water temperature as a function of stream distance and environmental heat flux. Net heat flux is calculated as the sum of heat to or fr...

171

Jet Streams and Weather  

NSDL National Science Digital Library

In this lesson, students learn about jet streams and explore the effects the polar-front jet stream has on weather conditions in North America. They begin by doing an interactive activity that highlights the atmospheric conditions and phenomena that create jet streams. They then look at a model that illustrates the relationships between latitude and variations in air temperature, wind speed, and altitude and begin to make generalizations about these relationships. In the second part of this lesson, they use the knowledge gained in the first part to interpret weather maps, helping them to make direct connections between the behavior of the polar-front jet stream and seasonal weather patterns in North America. As a final exercise, they will use real data to deepen their understanding of the relationships between pressure, altitude, and the wind speed of jet streams.

2005-01-01

172

Retiring Lives  

ERIC Educational Resources Information Center

"Retiring Lives" presents fourteen personal real life stories from people at various stages of retiring. Each author recounts their own story about retiring, bringing together many aspects of the experiences: the social, psychological and practical. These inspirational and illustrated stories will encourage the reader to hold up these experiences

Carnell, Eileen, Ed.; Lodge, Caroline, Ed.

2009-01-01

173

Outdoor Living.  

ERIC Educational Resources Information Center

Course objectives and learning activities are contained in this curriculum guide for a 16-week home economics course which teaches cooking and sewing skills applicable to outdoor living. The course goals include increasing male enrollment in the home economics program, developing students' self-confidence and ability to work in groups, and

Cotter, Kathy

174

Gaia Live in School  

NASA Astrophysics Data System (ADS)

Gaia is the European Space Agency's (ESA) next major astronomy telescope mission that was launched December 19, 2013. Gaia will measure accurate distances to about one billion stars across our Milky Way, allowing us to better understand how our galaxy formed and evolved. Gaia will have a profound impact on our understand ing of the Universe and the nature of dark matter, and provide a deeper understanding of how planets form around stars in our local neighbourhood. Gaia scientists and science education advisors are organising a Gaia post-launch event to link approximately forty schools across Europe. The event will include a live stream connection to ESA Gaia Mission Control and local Gaia research students to act as explainers and give practical demonstrations in each school. This paper describes the challenges in conducting this Europe-wide event.

Walton, N. A.; Barnes, R.; Soubiran, C.; Vogt, S.

2014-07-01

175

Living and non-living things  

NSDL National Science Digital Library

Living things often rely on non-living things to accomplish daily tasks. Living things have several characteristics that non-living things do not, such as the ability to move, eat, breathe, and reproduce. Living things and non-living things can interact even though they do not have the same characteristics.

Olivia Worland (Purdue University;Biological Sciences)

2008-06-25

176

DagStream: locality aware and failure resilient peer-to-peer streaming  

NASA Astrophysics Data System (ADS)

Live peer to peer (P2P) media streaming faces many challenges such as peer unreliability and bandwidth heterogeneity. To effectively address these challenges, general "mesh" based P2P streaming architectures have recently been adopted. Mesh-based systems allow peers to aggregate bandwidth from multiple neighbors, and dynamically adapt to changing network conditions and neighbor failures. However, a drawback of mesh-based overlays is that it is difficult to guarantee network connectivity in a distributed fashion, especially when network locality needs to be optimized. This paper introduces a new P2P streaming framework called DagStream, which (1) organizes peers into a directed acyclic graph (DAG) where each node maintains at least k parents, thus has provable network connectivity (and hence failure resilience), and (2) enables peers to quickly achieve locality awareness in a distributed fashion, thus ensures efficient network resource usage. Our experiment results in both simulation and wide area environment show that with our DagStream protocol, peers can quickly self-organize into a locality aware DAG. Further, by selecting additional parents as needed, peers can achieve good streaming quality commensurate with their downlink bandwidth.

Liang, Jin; Nahrstedt, Klara

2006-01-01

177

BALTIMORE STREAM RESTORATION PROJECT  

EPA Science Inventory

26 Feb 2003 Approach - We will employ a 4-tiered research approach to investigate restoration effects on hydrology and stream water quality: 1) monitoring ground water and surface water, 2) quantifying denitrification activity, 3) measuring carbon supply and rete...

178

Urban Stream Ecology  

EPA Science Inventory

Urban watersheds characteristically have high impervious surface cover, resulting in high surface runoff and low infiltration following storms. In response, urban streams experience ?flashy? stormflows, reduced baseflows, bank erosion, channel widening, and sedimentation. Urban ...

179

Ramification of stream networks  

E-print Network

The geometric complexity of stream networks has been a source of fascination for centuries. However, a comprehensive understanding of ramificationthe mechanism of branching by which such networks growremains elusive. ...

Devauchelle, Olivier

180

Estimating Flow in Streams  

NSDL National Science Digital Library

Presented by West Virginia University, this site addresses flow rates in streams and how to accurately estimate these rates. The site contains thorough diagrams along with solid explanatory text. Overall, the presentation is strong and easily comprehended.

Porter, Dana O.

2008-10-14

181

Webcams in Context: Web Interfaces to Create Live 3D Environments  

E-print Network

Maps. Here we extend web interfaces designed explicitly for novice users to integrate streaming video-registered streaming cameras in hundreds of scenes to create live, updating textures in 3D scenes. General TermsWebcams in Context: Web Interfaces to Create Live 3D Environments Austin D. Abrams, Robert B. Pless

Pless, Robert

182

Snapshot Processing in Streaming Environments  

Microsoft Academic Search

Computational issues related to streaming data, and in par- ticular the monitoring and rapid correlation of multiple sources of streaming data, are becoming increasingly important in contexts ranging from business processes to crisis detection. Applications include automated commodities trading (streams of stock and commodity ticker data), medical monitoring (streams of medical information from instruments worn by or in the vicinity

Daniel M. Zimmerman; K. Mani Chandy

2006-01-01

183

Estuary Live!!!  

NSDL National Science Digital Library

Intended for elementary, middle, and high school students, this electronic estuary excursion, Estuary Live!!!, will take place May 8-12, 2000. Free to participants (but please sign up in advance), the field trip will explore the Rachel Carson Site of the North Carolina National Estuarine Research Reserve, covering four islands and salt marshes off the North Carolina coast. The site features useful educational materials, including a photo-illustrated field guide (of the "ecology, habitats and specific plants and animals found in North Carolina's estuaries"); lesson plans (covering highschool biology, estuary habitats, species interactions, and adaptations and communities); and a series of related links. The interactive field trip will require a java-enabled browser, RealVideo (to see a moving image and hear sound), and/or Chatvideo, to see a moving image, ask questions of the naturalist leading the trip, and receive responses via a chat window. Note that ChatVideo requires Netscape 4.0 or better and will not work with AOL or Internet Explorer, and pages "look best" on a screen with resolution of 800x600. The Estuary Live!!! Website is provided by the North Carolina National Estuarine Research Reserve Program, and The Center for Science, Mathematics and Technology Education at East Carolina University.

184

UNM Live  

NSDL National Science Digital Library

If you can't make it to the University of New Mexico campus in Albuquerque, why not tune in to their events online? This is now possible, courtesy of the UNM Live website. The function of this site is to bring "educational resources to a wider audience", and their focus is quite catholic, with talks on student aid, podcasts on anthropology, and so on. Visitors can learn about the initiative via the "About UNM Live" section of the site, and for more general information, they can look over the "What is a podcast? How do I subscribe?" area. First-time visitors should start by listening to Professor Jerry Shea talk about the Swahili terms "Sasa" and "Zamani" for a good introduction to the site. The social networking media options are quite easy to use, and visitors can recommend various media clips and programs to friends and others. Also, visitors can use the "Categories" area to look for materials related to campus life, arts, business, education, and current affairs.

185

FACTORS CONTROLLING HYDROLOGIC PERMANENCE OF HEADWATER STREAMS  

EPA Science Inventory

Headwater streams compose the majority of stream miles within most drainages. Interest in monitoring headwater streams is increasing because headwater streams are vital linkages between upland land use and downstream water bodies. However, traditional stream assessment tools ar...

186

A spatially confined long-lived stream of solar particles  

NASA Astrophysics Data System (ADS)

The intensities of low-energy solar-interplanetary electrons and ions at 1 AU occasionally change in a "square-wave" fashion. The changes may be increases or decreases and they have duration of a few hours. In one such example following a solar flare, particles flow away from the Sun in a well-defined channel 2.5106km in width for twenty hours or longer. The authors believe that the interplanetary magnetic lines defined by this channel connect to an active region at 16N solar latitude. At this time the Earth was located at a solar latitude of 2S. Evidently the particle channel connects to a region of the solar atmosphere which supplies particles over these long times either via storage of the flare accelerated particles or else by continuous acceleration. Arguments are given against the latter possibility. The authors discuss a model for coronal storage which is consistent with the observations.

Anderson, K. A.; Dougherty, W. M.

1986-01-01

187

A spatially confined long-lived stream of solar particles  

NASA Technical Reports Server (NTRS)

The intensities of low-energy solar-interplanetary electrons and ions at 1 AU occasionally change in a 'square-wave' fashion. The changes may be increases or decreases and they have duration of a few hours. In one such example following a solar flare, particles flow away from the sun in a well-defined channel 2.5 x 10 to the 6th km in width for twenty hours or longer. It is believed that the interplanetary magnetic lines defined by this channel connect to an active region at 16 deg N solar latitude. At this time the earth was located at a solar latitude of 2 deg S. Evidently the particle channel connects to a region of the solar atmosphere which supplies particles over these long times either via storage of the flare accelerated particles or else by continuous acceleration. Arguments are given against the latter possibility. A model for coronal storage which is consistent with the observations is discussed.

Anderson, K. A.; Dougherty, W. M.

1986-01-01

188

The streams of our lives: visualizing listening histories in context.  

PubMed

The choices we take when listening to music are expressions of our personal taste and character. Storing and accessing our listening histories is trivial due to services like Last.fm, but learning from them and understanding them is not. Existing solutions operate at a very abstract level and only produce statistics. By applying techniques from information visualization to this problem, we were able to provide average people with a detailed and powerful tool for accessing their own musical past. LastHistory is an interactive visualization for displaying music listening histories, along with contextual information from personal photos and calendar entries. Its two main user tasks are (1) analysis, with an emphasis on temporal patterns and hypotheses related to musical genre and sequences, and (2) reminiscing, where listening histories and context represent part of one's past. In this design study paper we give an overview of the field of music listening histories and explain their unique characteristics as a type of personal data. We then describe the design rationale, data and view transformations of LastHistory and present the results from both a lab- and a large-scale online study. We also put listening histories in contrast to other lifelogging data. The resonant and enthusiastic feedback that we received from average users shows a need for making their personal data accessible. We hope to stimulate such developments through this research. PMID:20975150

Baur, Dominikus; Seiffert, Frederik; Sedlmair, Michael; Boring, Sebastian

2010-01-01

189

Tweeting videos: coordinate live streaming and storage sharing  

Microsoft Academic Search

User generated video sharing (e.g., YouTube) and social-networked micro-blogging (e.g., Twitter) are among the most popular Internet applications in the Web 2.0 era. It is known that these two applications are now tightly coupled, with many new videos being tweeted among Twitter users. Unfortunately, video sharing sites are facing critical server bottlenecks and the surges created by Twitter followers would

Xu Cheng; Jiangchuan Liu

2010-01-01

190

LACES: Live Authoring through Compositing and Editing of Streaming Video  

E-print Network

devices and social media sites such as YouTube and Facebook has further increased casual video creation editing, video manipulation typically requires a tedious and cumbersome offline process with tools deal of off-line time is devoted to sorting through the corpus of video content to recall, analyze

191

London Lives  

NSDL National Science Digital Library

"London Lives: Crime, Poverty and Social Policy in the Metropolis" is a project with the goal of "assessing the role of plebeians in the evolution of social practices in the modern metropolis." In other words, the website aims to make accessible the records of non-elite individuals in order to show how those users of particular social institutions charities, the penal system, and others shaped their development. Visitors can choose "Browse Documents" to see the types of documents available, such as "Parish Archives", "Criminal Records", and "Coroners' Records". The "City of London Coroners" records from the 1780s include an inquest into a suspicious death, with no less than a dozen interviews with people who knew the man who died, and one of whom attested to him being "a little touched in the head". The "Additional Datasets" link contains 16 other datasets, including one of boys recruited to serve at sea for the Marine Society.

192

Living Links  

NSDL National Science Digital Library

Hosted by the Yerkes Regional Primate Research Center at Emory University, the Living Links site specializes in "comparisons of the social life, ecology, cognition, neurology, and molecular genetics of apes and humans." With an emphasis on the four extant great apes (bonobos, chimpanzees, gorillas, and orangutans), this educational site attempts "1) to reconstruct human evolution, 2) pinpoint the differences and similarities between humans and apes, and 3) educate the public about apes, and promote their well-being and conservation." The Info section provides a long (hyperlinked) list of general information on apes, from Allogrooming to Wooly spider monkeys. The Research section gives a brief overview of the Yerkes Center's research questions (and their evolutionary context), and Animals describes the Center's study animals -- three main social groups of chimpanzees -- with a special vocalizations feature. For those interested in learning more about apes and how our ancestry is intertwined with theirs, this site will be of interest.

193

Carbon and nitrogen stoichiometry and nitrogen cycling rates in streams  

Microsoft Academic Search

Stoichiometric analyses can be used to investigate the linkages between N and C cycles and how these linkages influence biogeochemistry at many scales, from components of individual ecosystems up to the biosphere. N-specific NH 4 + uptake rates were measured in eight streams using short-term 15N tracer additions, and C to N ratios (C:N) were determined from living and non-living

Walter K. Dodds; Eugenia Mart; Jennifer L. Tank; Jeffrey Pontius; Stephen K. Hamilton; Nancy B. Grimm; William B. Bowden; William H. McDowell; Bruce J. Peterson; H. Maurice Valett; Jackson R. Webster; Stan Gregory

2004-01-01

194

Paleo-ice stream types  

NASA Astrophysics Data System (ADS)

During mapping of the Laurentide and Fennoscandian ice sheet beds we have observed and mapped a large number of paleo-ice streams, including apparently anomalous ice streams ocurring on high shear-stress bed materials, and with little or no topographic guidance. In addition, we have found evidence that in several places in the Canadian Arctic there developed a special category of small ephemeral ice streams during the deglaciation. They indicate flow patterns that are very different from older semi-stable ice streams in the respective areas. These observations of several types of "anomalous" ice streams lead us to think that scientific understanding of ice-stream behaviour has been hampered by an over-simplified terminology that presupposes that ice streams are one phenomenon, largely governed by one set of controls. Instead we hold the view that an understanding of ice-stream behaviour must start with a subdivision of the term "ice stream" into genetically distinct categories, with research focused at clarifying the controls for each category. A tentative classification scheme for paleo-ice streams should comprise at least five different types of ice streams, i/ Classical ice streams which occur on an excessively lubricated bed, i.e. preferably over fine-grained substrate with low permeability. Most of these ice streams terminated in lacustrine or marine water bodies. The numerous Baltic Ice Streams and the Cochrane surges into glacial lakes Agassis/Ojibway are examples of this type, ii/ Semi-stable ice streams which exist in locations where overall ice-sheet geometry favors the occurrence of long-lasting convergent flow, i.e. downstream of saddles in the ice-sheet surface. The re - Trondheim area in Scandinavia was likely a site for such an ice stream, iii/ Transient rigid-bed ice streams, which form without obvious topographical or substratum control when thawed spots start to develop under a largely cold-based ice sheet, which then finds itself with a steeper profile than the reduced bed traction can sustain. The unnamed Finnish ice streams that terminate in the Salpausselk lobes are prime examples, and the Dubawnt ice stream in Keewatin may also be of this type, iiii/ Topographic ice streams, which are constrained by topography and fixed in space but variable in time. The Hudson Strait, Laurentian Channel, and Norwegian Channel ice streams are prime candidates for this type, and iiiii/ Re-equilibration ice streams, which probably develop as a response to rapid calving and breakup of ice in adjacent marine areas. Good examples are the east-trending ice stream on Prince of Wales Island, the small Cap Krusenstern ice stream and numerous ice streams on Baffin Island.

Kleman, J.; de Angelis, H.; Greenwood, S.

2010-12-01

195

The Gulf Stream Voyage  

NSDL National Science Digital Library

The Gulf Stream Voyage is an online multidisciplinary project which utilizes both real time data and primary source materials to help guide students to discover the science and history of the Gulf Stream. Students will investigate this great ocean current, how it affects the Atlantic Ocean and some of mankind's experiences dealing with it. This voyage includes activities for marine science, earth science, chemistry, physics, biology, math, history and language arts. All may be easily used in today's technology enhanced classroom including access to real time ocean data, atmospheric data and historical primary source materials.

2000-01-01

196

Defending Against Buffer Map Cheating in DONet-Like P2P Streaming  

Microsoft Academic Search

Data-driven overlay network (DONet)-like P2P system is especially suitable to support live stream applications, since its data structure can tolerate node dynamics quite well. However, optimal streaming demands the cooperation of individual nodes. If selfish nodes cheat about their buffer maps to reduce the forwarding burden, the overall streaming quality would be negatively affected. To defend against this kind of

Dan Li; Jianping Wu; Yong Cui

2009-01-01

197

Live Your Life Well  

MedlinePLUS

... Living Well Live Your Life Well Live Your Life Well The 10 Tools These proven tools can ... build a rewarding life. About the Live Your Life Well Campaign Mental Health America is the country's ...

198

Interference Shaping for Improved Quality of Experience for Real-Time Video Streaming  

E-print Network

of revenues for network operators. Besides being bandwidth intensive, live video streaming and conversational1 Interference Shaping for Improved Quality of Experience for Real-Time Video Streaming Sarabjot are mapped to the real- time video packet loss rate, and the interference shaping QoE gain for video users

de Veciana, Gustavo

199

The Effects of Mobility on Wireless Media Streaming Performance Guangwei Bai Carey Williamson  

E-print Network

and multimedia streaming are two popular services on the Internet today. The Web has made the Internet available form, at relatively modest cost [6, 11]. Mobile users are interested in exploiting the technology, press conferences, news events, sports, and entertainment applications. Live multimedia streaming offers

Williamson, Carey

200

Community capacity amongst people living with HIV\\/AIDS  

Microsoft Academic Search

Mobilisation of people living with HIV\\/AIDS in the 1980s was tied to social identity and the public rendering of AIDS as a\\u000a gay disease. This activism has continued in large cities alongside new streams of mobilization addressing the needs of groups\\u000a such as women and Aboriginal peoples living with HIV. We draw on interviews conducted with six people living with

Sarah A. Lovell; Mark W. Rosenberg

2011-01-01

201

WESTERN MARYLAND STREAM SURVEY  

EPA Science Inventory

THE OBJECTIVE OF THE STUDY WAS TO ASSESS THE RELATIONSHIP BETWEEN STREAM SENSITIVITY TO ACIDIFICATION, FISH DISTRIBUTION, AND ABUNDANCE. WATER QUALITY AND FISH SAMPLING WERE CONDUCTED AT 72 STATIONS WITHING THE APPALACHIAN PLATEAU OF WESTERN MARYLAND IN 1989. THE FISHERIES DATA...

202

Biomonitoring our streams  

USGS Publications Warehouse

Biomonitoring is often used to enhance or replace chemical monitoring when evaluating water quality in our streams. This report is intended to introduce the theories behind biomonitoring and some of the techniques used in a biomonitoring study. It also lists some of the advantages and limitations of biomonitoring.

Byl, Thomas; Duane, Smith, George F.

1994-01-01

203

Stream Sockets on SHRIMP  

Microsoft Academic Search

This paper describes an implementation of stream sockets for the SHRIMP multicomputer. SHRIMP supports protected, user-level data transfer, allows user-level code to perform its own buffer management, and separates data transfers from control transfers so that data transfers can be done without the interrupting the receiving node's CPU. Our sockets implementation exploits all of these features to provide high performance.

Stefanos N. Damianakis; Cezary Dubnicki; Edward W. Felten

1997-01-01

204

Practical Meteor Stream Forecasting  

NASA Technical Reports Server (NTRS)

Inspired by the recent Leonid meteor storms, researchers have made great strides in our ability to predict enhanced meteor activity. However, the necessary calibration of the meteor stream models with Earth-based ZHRs (Zenith Hourly Rates) has placed emphasis on the terran observer and meteor activity predictions are published in such a manner to reflect this emphasis. As a consequence, many predictions are often unusable by the satellite community, which has the most at stake and the greatest interest in meteor forecasting. This paper suggests that stream modelers need to pay more attention to the needs of this community and publish not just durations and times of maxima for Earth, but everything needed to characterize the meteor stream in and out of the plane of the ecliptic, which, at a minimum, consists of the location of maximum stream density (ZHR) and the functional form of the density decay with distance from this point. It is also suggested that some of the terminology associated with meteor showers may need to be more strictly defined in order to eliminate the perception of crying wolf by meteor scientists. An outburst is especially problematic, as it usually denotes an enhancement by a factor of 2 or more to researchers, but conveys the notion of a sky filled with meteors to satellite operators and the public. Experience has also taught that predicted ZHRs often lead to public disappointment, as these values vastly overestimate what is seen.

Cooke, William J.; Suggs, Robert M.

2003-01-01

205

Situation-awareness and sensor stream mining for sustainable society  

Microsoft Academic Search

Criminal activities are causing a huge amount of loss both in term of financial and human lives. Due to these acts, business and social sectors are striving. This paper is aimed to develop an online sensor stream mining system, able to analyze situational behavior of all persons in some specific vicinity and proposes real-time alert system to take countermeasures. This

Z. ur Rehman; M. Shaheen

2009-01-01

206

Open Source Initiative Powers Real-Time Data Streams  

NASA Technical Reports Server (NTRS)

Under an SBIR contract with Dryden Flight Research Center, Creare Inc. developed a data collection tool called the Ring Buffered Network Bus. The technology has now been released under an open source license and is hosted by the Open Source DataTurbine Initiative. DataTurbine allows anyone to stream live data from sensors, labs, cameras, ocean buoys, cell phones, and more.

2014-01-01

207

Riparian deforestation, stream narrowing, and loss of stream ecosystem services  

Microsoft Academic Search

A study of 16 streams in eastern North America shows that riparian deforestation causes channel narrowing, which reduces the total amount of stream habitat and ecosystem per unit channel length and compromises in-stream processing of pollutants. Wide forest reaches had more macroinvertebrates, total ecosystem processing of organic matter, and nitrogen uptake per unit channel length than contiguous narrow deforested reaches.

Bernard W. Sweeney; Thomas L. Bott; John K. Jackson; Louis A. Kaplan; J. Denis Newbold; Laurel J. Standley; W. Cully Hession; Richard J. Horwitz

2004-01-01

208

ASSESSING HEADWATER STREAMS: LINKING LANDSCAPES TO STREAM NETWORKS  

EPA Science Inventory

Headwater streams represent a significant land-water boundary and drain 70-80% of the landscape. Headwater streams are vital components to drainage systems and are directly linked to our downstream rivers and lakes. However, alteration and loss of headwater streams have occurre...

209

Stream aquifer interactions: analytical solution to estimate stream depletions caused by stream stage fluctuations and pumping wells near streams  

E-print Network

-aquifer systems with a fully penetrating pumping well in a confined aquifer between two parallel fully penetrating streams with and without streambeds are discussed. Stream depletion rates in Chapter II are solved using Laplace and Fourier transform methods...

Intaraprasong, Trin

2009-05-15

210

Distortion Optimized Multipath Video Streaming  

Microsoft Academic Search

This paper addresses the problem of choosing the best streaming policy for distortion optimal multipath video delivery, under delay constraints. The streaming policy consists in a joint selection of the video packets to be transmitted, as well as their sending time, and the transmission path. A simple streaming model is introduced, which takes into account the video packet importance, and

Dan Jurca; Pascal Frossard

211

Duplicate detection in click streams  

Microsoft Academic Search

We consider the problem of finding duplicates in data streams. Duplicate detection in data streams is utilized in various applications including fraud detection. We develop a solution based on Bloom Filters [9], and discuss the space and time requirements for running the proposed algorithm in both the contexts of sliding, and landmark stream windows. We run a comprehensive set of

Ahmed Metwally; Divyakant Agrawal Amr; Amr El Abbadi

2005-01-01

212

Meteor Stream Membership Criteria  

E-print Network

Criteria for the membership of individual meteors in meteor streams are discussed from the point of view of their mathematical and also physical properties. Discussion is also devoted to the motivation. It is shown that standardly used criteria (mainly D-criterion of Southworth and Hawkins, 1963) have unusual mathematical properties in the sense of a term ``distance'', between points in a phase space, and, physical motivation and realization for the purpose of obtaining their final form is not natural and correct, and, moreover, they lead also to at least surprising astrophysical results. General properties of possible criteria are discussed. A new criterion for the membership in meteor streams is suggested. It is based on probability theory. Finally, a problem of meteor orbit determination for known parent body is discussed.

Jozef Klacka

2000-05-25

213

STL conform infinite streams  

NASA Astrophysics Data System (ADS)

Self-referencing data is widely-used in lazy functional languages. This technique enables us to express infinite data with a finite structure. Since C++ is a multiparadigm language, it is possible to utilize the advantages of these functional methods in C++ programs. In this paper besides we describe the basic concept of stream-oriented programming in C++ we mainly focus on integration to the Standard Template Library (STL).

Sz?gyi, Zaln; Gbi, Attila

2013-10-01

214

Streaming Systems in FPGAs  

Microsoft Academic Search

As FPGA devices have become larger and more capable, they have transitioned from being used primarily as flexible glue logic\\u000a to being used as central data processing elements in many digital systems. Typically, these systems (including video processing,\\u000a wired and wireless networking) rely on streaming architectures. These architectures differ significantly from traditional\\u000a processor architectures and are able to offer unique

Stephen Neuendorffer; Kees Vissers

2008-01-01

215

Homeostasis: From Living Creatures to Living Machines  

Microsoft Academic Search

The Problem: While many robots in industry and research have proven capable of operating in com- plex environments, most robots still fall well short of living creatures in their ability to deal with extreme variations in their environment. Living creatures, by contrast, will typically cope in any environment to the extent that their physical bodies allow. Living creatures never give

Bryan Adams

2001-01-01

216

Live Video and IP-TV  

NASA Astrophysics Data System (ADS)

This Chapter aims at providing a comprehensive insight into the most recent advances in the field of P2P architectures for video broadcasting, focusing on live video streaming P2P live video streaming . After introducing a classification of P2P video solutions, the first part of the Chapter provides an overview of the most interesting P2P IP-TV P2P IP-TV systems currently available over the Internet. It also concentrates on the process of data diffusion within the P2P overlay and complements this view with some measurements that highlight the most salient features of P2P architectures. The second part of the Chapter completes the view, bringing up the modeling efforts to capture the main characteristics and limits of P2P streaming systems, both analytically and numerically. The Chapter is closed by a pristine look at some challenging, open questions, with a specific emphasis on the adoption of network coding in P2P streaming solutions.

Merani, Maria Luisa; Saladino, Daniela

217

Assisted Living Community Profile  

MedlinePLUS

... of all residents live in small communities. 2 Fee Structures - The costs for assisted living residences vary ... inclusive rate model, and 17 percent use a fee-for-service model. 1 Services - Assisted living residences ...

218

8.F Video Streaming  

NSDL National Science Digital Library

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: You work for a video streaming company that has two monthly plans to choose from: Plan 1: A flat rate of \\$7 per month plus \\$2.50 per video viewed Pla...

219

StreamingMediaLand.com: Resources for Streaming Media Professionals  

NSDL National Science Digital Library

Streaming media is one of the dominant technologies on the Internet for viewing digital audio and video. Debuting about a year and a half ago, Streaming Media Land has many features covering this important topic. People working in information technology will benefit from industry coverage, white papers, and technology and protocol descriptions. Links to streaming media news and organizations are also given. Users of streaming media and related technologies will find information about bandwidths for a variety of connection and transmission types, as well as market data and projections.

2000-01-01

220

STREAMS IN THE URBAN LANDSCAPE  

Microsoft Academic Search

? Abstract The worlds population is concentrated,in urban areas. This change,in demography,has brought landscape transformations that have a number,of documented effects on stream ecosystems. The most consistent and pervasive effect is an increase in impervious surface cover within urban catchments, which alters the hydrology and geomorphology,of streams. This results in predictable changes,in stream habitat. In addition to imperviousness, runoff from

Michael J. Paul; Judy L. Meyer

2001-01-01

221

Test Your Stream Erosion IQ  

NSDL National Science Digital Library

Test Your Stream Erosion IQ is an online activity for students to examine topographical maps of stream erosion, and identify the type of landforms that would be created by the stream channels shown on the maps. From the elevation contour lines, students decide if the dome, mountain peak, U-shaped canyon, irregular, or V-shaped canyon landforms are represented. There are also photographs to illustrate the landforms.

222

Streams of Coal or Streams of Death? A Toxicology Case Study  

NSDL National Science Digital Library

Mary Beth was raised in Western Pennsylvania, an area where thousands of abandoned coal mines have led to extensive contamination of streams and associated ground waters. Aquatic life has clearly suffered, but the health effects on people living along the waterways have not been so clear. In working through this interrupted case study, students consider the biological consequences for Mary Beth’s family by analyzing selected research articles. Originally developed for an upper level toxicology course, it would also be appropriate for a cancer biology course and could easily be adapted for a course in science and society or environmental studies.

Niedziela, Linda

2007-01-01

223

Cross-channel collaborations in peer-to-peer streaming  

NASA Astrophysics Data System (ADS)

Peer-to-Peer(P2P) streaming has become a very popular technique to realize live media broadcast over the Internet. Most previous research of P2P streaming focuses on the delivery of a single media stream (called a channel). The widely deployed implementations, however, all concurrently offer multiple channels through their P2P networks. This paper investigates the overlay organization for multi-channel P2P streaming systems through modeling and simulations. In particular, this paper examines the potential collaborations among nodes across multiple channels. Our investigation shows that collaboration among nodes across different channels can improve the overall performance of the multi-channel P2P streaming system. However, the collaboration strategies need to be carefully selected. Simple collaboration strategies, such as treating collaborative nodes (those "borrowed" from other channels) the same as a channel's native nodes (those playing the channel), tend to have marginal or even negative effects on the whole system performance. This result is contrary to common impression - the larger population the better performance of P2P system - and we found that this is caused by the differences between P2P streaming and traditional P2P file-sharing systems. Furthermore, this paper proposes a set of simple strategies that controls the upload-download ratio of collaborative nodes. We showed that this set of strategies produces a much better collaboration result for multi-channel P2P streaming systems. Although only a preliminary study, we believe the results will promote further investigation on the topic of multi-channel P2P streaming.

Li, Hongchao; Li, Kang

2007-01-01

224

Optimized adaptation of video streams in streaming servers  

Microsoft Academic Search

In this paper we investigate stream adaptation policies for video streaming servers which use smooth TCP-friendly congestion controls to compute the sending bitrate. We seek an optimal adaptation policy which maximizes the per- ceived quality at the client side and tries to avoid an empty prefetch buffer at the client side. In order to do so, we first develop an

Adrian Sterca

225

ASSESSING STREAM BED STABILITY AND EXCESS SEDIMENTATION IN MOUNTAIN STREAMS  

EPA Science Inventory

Land use and resource exploitation in headwaters catchments?such as logging, mining, and road building?often increase sediment supply to streams, potentially causing excess sedimentation. Decreases in mean substrate size and increases in fine stream bed sediments can lead to inc...

226

Reactive transport of iomeprol during stream-groundwater interactions.  

PubMed

The transport and biochemical transformations of the iodinated X-ray contrast medium (ICM) iomeprol were studied at the stream/groundwater interface. During a one-month field experiment piezometric pressure heads, temperatures, and concentrations of redox-sensitive species, iomeprol and 15 of its transformation products (TPs) were collected in stream- and groundwater. The data set was analyzed and transformation processes and rates identified by comparing conservative and reactive transport simulations. ICM and TP transformations were simulated as a cometabolic process during organic carbon degradation. Using iomeprol/TPs ratios as calibration constrain mitigated the uncertainties associated with the high variability of the ICM wastewater discharge into the investigated stream. The study provides evidence that biodegradation of ICM occurs at the field-scale also for predominantly denitrifying conditions. Under these anaerobically dominated field conditions shortest simulated half-life (21 days) was in the same range as previously reported laboratory-determined half-lives for aerobic conditions. PMID:24274631

Engelhardt, Irina; Prommer, Henning; Schulz, Manoj; Vanderborght, Jan; Schth, Christoph; Ternes, Thomas A

2014-01-01

227

Analysis of real-time multiple source video streaming via wireless 5.8 GHz for intelligent traffic management system  

Microsoft Academic Search

This paper evaluates the performance of live compressed motion image transmission in coherence with the development of the multiple video streaming and compression (Multiple-VSCS) software, as applied for the intelligent traffic management system. Motion Images of multiple sources are captured, jointly compressed and streamed real time via utilization of the 5.8 GHz OFDM outdoor wireless LAN network. Experiments were performed

V. M. Baskaran; S. K. Tiong; M. Z. Jamaludin

2005-01-01

228

Analysis of Real-Time Multiple Source Video Streaming via Wireless 5.8 GHz for Intelligent Traffic Management System  

Microsoft Academic Search

This paper evaluates the performance of live compressed motion image transmission in coherence with the development of the multiple video streaming and compression (multiple-VSCS) software, as applied for the intelligent traffic management system. Motion images of multiple sources are captured, jointly compressed and streamed real time via utilization of the 5.8 GHz OFDM outdoor wireless LAN network. Experiments were performed

V. M. Baskaran; S. K. Tiong; M. Z. Jamaludin

2005-01-01

229

Identifying Markers of Heavy Metal Contamination in Idaho Streams: A Service-Learning Project in Biochemistry Lab  

Microsoft Academic Search

The presence of heavy-metal resistance genes in stream bacteria is an indicator of environmental contamination. The mercuric reductase gene involved in confering heavy metal resistance was found on a large plasmid isolated from organisms living in a Northern Idaho stream. The gene was identified using bioinformatics, and its function being proven in Biochemistry lab through a series of experiments to

Daniel Quapp

2009-01-01

230

Resource Allocation in Streaming Environments  

Microsoft Academic Search

This paper considers resource allocation algorithms for processing streams of events on computational grids. For example, financial trading applications are executed on large computational grids that receive streams of data such as stock ticker prices, commodity prices, foreign-exchange rates and total risk exposure. The economic value of a com- putation depends on the time taken to execute it; an arbi-

Lu Tian; K. Mani Chandy

2006-01-01

231

Issues in data stream management  

Microsoft Academic Search

Traditional databases store sets of relatively static records with no pre-defined notion of time, unless timestamp attributes are explicitly added. While this model adequately represents commercial catalogues or repositories of personal information, many current and emerging applications require support for on-line analysis of rapidly changing data streams. Limitations of traditional DBMSs in supporting streaming applications have been recognized, prompting research

Lukasz Golab; M. Tamer zsu

2003-01-01

232

STREAMING IN THE PRIMARY SCHOOL  

Microsoft Academic Search

Professor Lynn suggests that two investigations carried out by Dr. Barker Lunn have yielded inconsistent results: the first (cross?sectional) study showed that the attainment of children in streamed schools was superior and the second (longitudinal) study showed that streamed children did better on one set of tests and unstreamed children did better on a parallel set of tests. He suggests

R. Lynn; Susan L. Hampson; Joan C. Barker Lunn; Jill M. Tarryer

1971-01-01

233

Save Our Streams and Waterways.  

ERIC Educational Resources Information Center

Protection of existing water supplies is critical to ensuring good health for people and animals alike. This program is aligned with the Izaak Walton League of American's Save Our Streams program which is based on the concept that students can greatly improve the quality of a nearby stream, pond, or river by regular visits and monitoring. The

Indiana State Dept. of Education, Indianapolis. Center for School Improvement and Performance.

234

Mobile video stream monitoring system  

Microsoft Academic Search

IMVS (Intelligent Mobile Video Stream Monitoring System) is a mobile video surveillance system. The objective of IMVS is to design a high performance video stream monitoring system in a mobile computing environment. In particular, the technical questions to be addressed are: (1) how to minimize the amount of video signals to be transmitted between the front-end mobile device and the

Kam-Yiu Lam; Calvin K. H. Chiu

2003-01-01

235

Stream Features of North Dakota  

NSDL National Science Digital Library

Stream and drainage landforms of North Dakota are revealed through photographs illustrating a continental drainage divide, meander features, a meander scar, natural levees, necks, an oxbow lake, and suspended sediment load. Each image is accompanied by a brief description of the location, how each landform originated, and how it is likely to evolve as stream processes continue.

236

Quantiles on Streams Chiranjeeb Buragohain  

E-print Network

Quantiles on Streams Chiranjeeb Buragohain Amazon.com Seattle, WA 98104, USA chiran@amazon.com Subhash Suri Dept. of Computer Science, University of California Santa Barbara, CA 93106, USA suri and the remaining (1 - )|S| are greater than x. This article describes data stream (single-pass) algorithms

Suri, Subhash

237

Helping Students Live Longer and Healthier Lives.  

ERIC Educational Resources Information Center

This document, which was written for adult educators in Georgia, offers instructional plans and practical strategies for helping students in adult literacy, adult basic education (ABE), General Educational Development, and English-as-a-second-language (ESL) programs live longer and healthier lives. The document begins with a discussion of why

Valentine, Tom, Ed.; Sandlin, Jenny, Ed.

1997-01-01

238

TCP-ROME: A Transport-Layer Approach to Enhance Quality of Experience for Online Media Streaming  

Microsoft Academic Search

Live streaming of multimedia content over the Internet is rapidly increasing, e.g. with the Web 2.0 and via peer-to-peer systems. While many homes today are equipped with sufficient bandwidth (DSL) to support high quality live streaming, the quality of experience of a user is dismal: the video resolution and size is small and the displaying is often interrupted. One of

Ju-won Park; Jongwon Kim; Roger P. Karrer

2008-01-01

239

Dynamical modelling of meteoroid streams  

NASA Astrophysics Data System (ADS)

Accurate simulations of meteoroid streams permit the prediction of stream interaction with Earth, and provide a measure of risk to Earth satellites and interplanetary spacecraft. Current cometary ejecta and meteoroid stream models have been somewhat successful in predicting some stream observations, but have required significant assumptions and simplifications. Extending on the approach of Vaubaillon et al. 2005, we model dust ejection from the cometary nucleus, and generate sample particles representing bins of distinct dynamical evolution-regulating characteristics (size, density, direction, albedo). Ephemerides of the sample particles are integrated and recorded for later assignment of weights based on model parameter changes. To assist in model analysis we are developing interactive software to permit the "turning of knobs" of model parameters, allowing for near-real-time 3D visualization of resulting stream structure. Using the tool, we will revisit prior assumptions made, and will observe the impact of introducing non-uniform and time-variant cometary surface attributes and processes.

Clark, D. L.; Wiegert, P. A.

2014-07-01

240

Producing a Live HDTV Program from Space  

NASA Technical Reports Server (NTRS)

By the year 2000, NASA had flown HDTV camcorders on three Space Shuttle missions: STS-95, STS-93 and STS-99. All three flights of these camcorders were accomplished with cooperation from the Japanese space agency (then known as NASDA and now known as JAXA). The cameras were large broadcast-standard cameras provided by NASDA and flight certified by both NASA and NASDA. The high-definition video shot during these missions was spectacular. Waiting for the return of the tapes to Earth emphasized the next logical step: finding a way to downlink the HDTV live from space. Both the Space Shuttle and the International Space Station (ISS) programs were interested in live HDTV from space, but neither had the resources to fully fund the technology. Technically, downlinking from the ISS was the most effective approach. Only when the Japanese broadcaster NHK and the Japanese space agency expressed interest in covering a Japanese astronaut's journey to the ISS did the project become possible. Together, JAXA and NHK offered equipment, technology, and funding toward the project. In return, NHK asked for a live HDTV downlink during one of its broadcast programs. NASA and the ISS Program sought a US partner to broadcast a live HDTV program and approached the Discovery Channel. The Discovery Channel had proposed a live HDTV project in response to NASA's previous call for offers. The Discovery Channel agreed to provide addItional resources. With the final partner in place, the project was under way. Engineers in the Avionics Systems Division at NASA's Johnson Space Center (JSC) had already studied the various options for downlinking HDTV from the ISS. They concluded that the easiest way was to compress the HDTV so that the resulting data stream would "look" like a payload data stream. The flight system would consist of a professional HDTV camcorder with live HD-SDI output, an HDTV MPEG-2 encoder, and a packetizer/protocol converter.

Grubbs, Rodney; Fontanot, Carlos; Hames, Kevin

2007-01-01

241

Dynamical Modeling of Tidal Streams  

NASA Astrophysics Data System (ADS)

I present a new framework for modeling the dynamics of tidal streams. The framework consists of simple models for the initial action-angle distribution of tidal debris, which can be straightforwardly evolved forward in time. Taking advantage of the essentially one-dimensional nature of tidal streams, the transformation to position-velocity coordinates can be linearized and interpolated near a small number of points along the stream, thus allowing for efficient computations of a stream's properties in observable quantities. I illustrate how to calculate the stream's average location (its "track") in different coordinate systems, how to quickly estimate the dispersion around its track, and how to draw mock stream data. As a generative model, this framework allows one to compute the full probability distribution function and marginalize over or condition it on certain phase-space dimensions as well as convolve it with observational uncertainties. This will be instrumental in proper data analysis of stream data. In addition to providing a computationally efficient practical tool for modeling the dynamics of tidal streams, the action-angle nature of the framework helps elucidate how the observed width of the stream relates to the velocity dispersion or mass of the progenitor, and how the progenitors of "orphan" streams could be located. The practical usefulness of the proposed framework crucially depends on the ability to calculate action-angle variables for any orbit in any gravitational potential. A novel method for calculating actions, frequencies, and angles in any static potential using a single orbit integration is described in the Appendix.

Bovy, Jo

2014-11-01

242

Augmenting Live Broadcast Sports with 3D Tracking Information  

E-print Network

that many of our effects operate on live video streams at frame-rate (60 Hz) with latencies of less than the offside line ­ a line that moves dynamically depending on the game play. Fig. 1. In the K-Zone system the game object (the ball in baseball, the puck in hockey); instrumenting broadcast cameras and creating

Balch, Tucker

243

StreamAuction Providing Auction Service Through  

E-print Network

through StreamSpin 3 #12;StructureStreamAuction Server new · New auction at StreamAuction · StreamSpin users receive new auction info bid update 4 StreamSpin Server new new · Users send their bids directly · GUI ­ New user­ New user ­ New auction ­ List auctions ­ Bidding page · pushed through StreamSpin 5

Kaiserslautern, Universität

244

Wood in New Zealand's Native Forest Streams. Recent Advances  

NASA Astrophysics Data System (ADS)

We conducted a series of research projects to investigate the importance of wood in native forested streams of New Zealand. We examined abundance and geomorphic role of wood in 18 pristine native forest streams (channel width: 3-6 m) throughout New Zealand. Forest type and geographic location had no discernable influence on wood abundance, possibly reflecting the confounding influences of local features (e.g., tree fall regime) and methodology (`snap-shot' survey of a dynamic system). Number (18-66 per 100 m) and dead wood volume (85-470 m3 ha-1) of stream logs were at the high end of the international range. Living trees contributed up to 25% of total wood, and tree ferns were strongly represented (up to 11% of volume). The largest 10% of pieces contributed 75% of the total volume. The importance of the large wood pieces (>10 m3) was explored further with surveys within that watershed containing the site with the greatest wood volume. The largest pieces were rare but seemed relatively uniformly distributed. To explore the biological consequences of stream wood, we studied use of wood-related micro-habitat by the crayfish (Paranephrops planifrons White). Our findings suggest that wood is an important component of New Zealand's forested stream ecosystems.

Mark, M. A.; Davies-Colley, R.

2005-05-01

245

Scientific Discovery within Data Streams  

SciTech Connect

This paper discusses our recent work across a number of disciplines, leading to a concept for a next generation analytical environment for scientific discovery within continuous, time-varying data-streams. First, we have created a stream-processing engine that processes multiple streams of interest. An analyst, via a client interface, reviews the data-stream format and specifies upstream filtering to define stream tokens of interest, leading to a highly specialized collection of time-variant material. We envision using this collection to drive an existing system that visualizes thematic variations over time across a corpus of information. This ThemeRiver helps analysts discern trends, relationships, anomalies, and structure in the data. Further, we make use of a number of technologies that allow us to investigate these elements in ambient environments that surround the user, placing them within their data. We discuss the HI-SPACE (Human Information Space) as a tool for bringing together the most desirable aspects of both physical and electronic information spaces to enhance the ability to interact with information, promote group dialog, and to facilitate group interaction with information to solve complex tasks. Here, we introduce a concept that combines these approaches to produce an advanced analytical environment for data stream analysis that provides a collaborative, ambient environment for scientific discovery in data-streams.

Cowell, Andrew J.; Havre, Susan L.; May, Richard A.; Sanfilippo, Antonio P.

2005-04-25

246

Living with Heart Block  

MedlinePLUS

... Share this page from the NHLBI on Twitter. Living With Heart Block First-degree heart block may ... whether you need ongoing care for your condition. Living With a Pacemaker People who have third-degree ...

247

Living with Heart Disease  

MedlinePLUS

... Share this page from the NHLBI on Twitter. Living With Heart Disease If you have coronary heart ... suddenly faint, collapse, or have other severe symptoms. Living With Broken Heart Syndrome Most people who have ...

248

Mixing of Supersonic Streams  

NASA Technical Reports Server (NTRS)

The Strutjet approach to Rocket Based Combined Cycle (RBCC) propulsion depends upon fuel-rich flows from the rocket nozzles and turbine exhaust products mixing with the ambient air for successful operation in the ramjet and scramjet modes. A model of the Strutjet device has been built and is undergoing test to investigate the mixing of the streams as a function of distance from the Strutjet exit plane. The modeling basis was centered on using convective Mach Number as the similarity parameter to establish correlation between subscale, cold flow tests and full scale, hot firing modes. This parameter has been used successfully to correlate supersonic shear layer growth rates. The experiment design includes hot (600 R) air as the rocket exhaust simulant and hot (760 R) carbon dioxide as the turbine exhaust gas simulant. The combination of gases and their elevated temperatures was required to achieve a convective Mach Number which matched the fall scale item design conditions. The carbon dioxide is seeded with Acetone to permit tracing of the mixing processes through Laser Induced Fluorescence (LIF) techniques. The experiment and its design will be discussed in detail. Both the rocket and turbine exhaust duct nozzles are of unique (square and rectangular) shape and the turbine exhaust e)dt intersects the rocket nozzle wall upstream of the exit. Cold flow testing with the individual nozzles has been conducted to ascertain their behavior in comparison to conventional flow theory. These data are presented.

Hawk, Clark W.; Landrum, D. Brian; Spetman, David

1997-01-01

249

FUTURE LOGISTICS LIVING LABORATORY  

E-print Network

logistics operations and secondary services in the area of insurance, customs and carbon footprint trackingFUTURE LOGISTICS LIVING LABORATORY Delivering Innovation The Future Logistics Living Lab that will provide logistics solutions for the future. The Living Lab is a demonstration, exhibition and work space

Heiser, Gernot

250

Living related liver transplantation  

Microsoft Academic Search

Liver transplantation from a brain death donor has not yet been accepted in Japan. The only alternative method at present is transplantation from a living donor. After the first successful living related liver transplantation was performed by Strong in Brisbane, Australia, Japanese hepatic and transplant surgeons also began to perform such operations. As of February 1991, 16 living related liver

Masatoshi Makuuchi; Hideo Kawarazaki; Tadashi Iwanaka; Naoshi Kamada; Tadatoshi Takayama; Masamitsu Kumon

1992-01-01

251

Living Willow Huts  

ERIC Educational Resources Information Center

Living Willow Huts are inexpensive to make, fun to plant, easy to grow, and make beautiful spaces for children. They involve planting dormant willow shoots in the ground and weaving them into shapes that will sprout and grow over time. People have been creating similar living architecture throughout the world for centuries in the forms of living

Keeler, Rusty

2007-01-01

252

A Payment-based Incentive and Service Differentiation Mechanism for Peer-to-Peer Streaming Broadcast  

Microsoft Academic Search

We proposes a novel payment-based incentive mech- anism for peer-to-peer (P2P) live media streaming. Using this approach, peers earn points by forwarding data to others; the data streaming is divided into fixed length periods, during each of which peers compete with each other for good parents (data suppliers) for the next period in a first-price auction like procedure using their

Guang Tan; Stephen A. Jarvis; Daniel P. Spooner

2006-01-01

253

A Payment-Based Incentive and Service Differentiation Scheme for Peer-to-Peer Streaming Broadcast  

Microsoft Academic Search

We propose a novel payment-based incentive scheme for peer-to-peer (P2P) live media streaming. Using this approach, peers earn points by forwarding data to others. The data streaming is divided into fixed-length periods; during each of these periods, peers compete with each other for good parents (data suppliers) for the next period in a first-price-auction-like procedure using their points. We design

Guang Tan; Stephen A. Jarvis

2008-01-01

254

Mixing of Supersonic Streams  

NASA Technical Reports Server (NTRS)

The Strutjet approach to Rocket Based Combined Cycle (RBCC) propulsion depends upon fuel-rich flows from the rocket nozzles and turbine exhaust products mixing with the ingested air for successful operation in the ramjet and scramjet modes. It is desirable to delay this mixing process in the air-augmented mode of operation present during low speed flight. A model of the Strutjet device has been built and is undergoing test to investigate the mixing of the streams as a function of distance from the Strutjet exit plane during simulated low speed flight conditions. Cold flow testing of a 1/6 scale Strutjet model is underway and nearing completion. Planar Laser Induced Fluorescence (PLIF) diagnostic methods are being employed to observe the mixing of the turbine exhaust gas with the gases from both the primary rockets and the ingested air simulating low speed, air augmented operation of the RBCC. The ratio of the pressure in the turbine exhaust duct to that in the rocket nozzle wall at the point of their intersection is the independent variable in these experiments. Tests were accomplished at values of 1.0, 1.5 and 2.0 for this parameter. Qualitative results illustrate the development of the mixing zone from the exit plane of the model to a distance of about 10 rocket nozzle exit diameters downstream. These data show the mixing to be confined in the vertical plane for all cases, The lateral expansion is more pronounced at a pressure ratio of 1.0 and suggests that mixing with the ingested flow would be likely beginning at a distance of 7 nozzle exit diameters downstream of the nozzle exit plane.

Hawk, C. W.; Landrum, D. B.; Muller, S.; Turner, M.; Parkinson, D.

1998-01-01

255

Mixing of Supersonic Streams  

NASA Technical Reports Server (NTRS)

The Strutjet approach to Rocket Based Combined Cycle (RBCC) propulsion depends upon fuel-rich flows from the rocket nozzles and turbine exhaust products mixing with the ingested air for successful operation in the ramjet and scramjet modes. It is desirable to delay this mixing process in the air-augmented mode of operation present during low speed flight. A model of the Strutjet device has been built and is undergoing test to investigate the mixing of the streams as a function of distance from the Strutjet exit plane during simulated low speed flight conditions. Cold flow testing of a 1/6 scale Strutjet model is underway and nearing completion. Planar Laser Induced Fluorescence (PLIF) diagnostic methods are being employed to observe the mixing of the turbine exhaust gas with the gases from both the primary rockets and the ingested air simulating low speed, air augmented operation of the RBCC. The ratio of the pressure in the turbine exhaust duct to that in the rocket nozzle wall at the point of their intersection is the independent variable in these experiments. Tests were accomplished at values of 1.0, 1.5 and 2.0 for this parameter. Qualitative results illustrate the development of the mixing zone from the exit plane of the model to a distance of about 19 equivalent rocket nozzle exit diameters downstream. These data show the mixing to be confined in the vertical plane for all cases, The lateral expansion is more pronounced at a pressure ratio of 1.0 and suggests that mixing with the ingested flow would be likely beginning at a distance of 7 nozzle exit diameters downstream of the nozzle exit plane.

Hawk, C. W.; Landrum, D. B.; Muller, S.; Turner, M.; Parkinson, D.

1998-01-01

256

MODELING PLUMES IN SMALL STREAMS  

EPA Science Inventory

Pesticides accumulate on land surfaces from agricultural, commercial, and domestic application, and wash into streams and rivers during dry and wet weather. Flood water retention basins or structures often collect this contaminated runoff, providing intermediate storage and limit...

257

Air-Stream Pollution Control.  

National Technical Information Service (NTIS)

The control of air and stream pollution represents a continuous challenge to the nation. The importance of the various papers presented by distinguished authorities at the seminar urged the value of making available complete texts to a wider audience conc...

1973-01-01

258

MVSP: multithreaded VLIW stream processor  

NASA Astrophysics Data System (ADS)

Stream processing is a new trend in computer architecture design which fills the gap between inflexible special-purpose media architectures and programmable architectures with low computational ability for media processing. Stream processors are designed for computationally intensive media applications characterized by high data parallelism and producer-consumer locality with little global data reuse. In this paper, we propose a new stream processor, named MVSP1. This processor is a programmable stream processor based on Imagine [1]. MVSP exploits TLP2, DLP 3, SP 4 and ILP 5 parallelisms inherent in media applications. Full simulator of MVSP has been implemented and several media workloads composed of EEMBC [2] benchmarks have been applied. The simulation results show the performance and functional unit utilization improvements of more than two times in comparison with Imagine processor.

Sardashti, Somayeh; Ghasemi, Hamid Reza; Fatemi, Omid

2006-02-01

259

Distributed Stream Processing with DUP  

Microsoft Academic Search

\\u000a This paper introduces the DUP System, a simple framework for parallel stream processing. The DUP System enables developers\\u000a to compose applications from stages written in almost any programming language and to run distributed streaming applications\\u000a across all POSIX-compatible platforms. Parallel applications written with the DUP System do not suffer from many of the problems\\u000a that exist in traditional parallel languages.

Kai Christian Bader; Tilo Eiler; Nathan S. Evans; Chris GauthierDickey; Christian Grothoff; Krista Grothoff; Jeff Keene; Harald Meier; Craig Ritzdorf; Matthew J. Rutherford

2010-01-01

260

Cytoplasmic streaming affects gravity-induced amyloplast sedimentation in maize coleoptiles  

NASA Technical Reports Server (NTRS)

Living maize (Zea mays L.) coleoptile cells were observed using a horizontal microscope to determine the interaction between cytoplasmic streaming and gravity-induced amyloplast sedimentation. Sedimentation is heavily influenced by streaming which may (1) hasten or slow the velocity of amyloplast movement and (2) displace the plastid laterally or even upwards before or after sedimentation. Amyloplasts may move through transvacuolar strands or through the peripheral cytoplasm which may be divided into fine cytoplasmic strands of much smaller diameter than the plastids. The results indicate that streaming may contribute to the dynamics of graviperception by influencing amyloplast movement.

Sack, F. D.; Leopold, A. C.

1985-01-01

261

Animal Ecosystem Engineers in Streams  

NSDL National Science Digital Library

This peer reviewed article from BioScience is about animal ecosystem engineers in streams. An impressive array of animals function as ecosystem engineers in streams through a variety of activities, ranging from nest digging by anadromous salmon to benthic foraging by South American fishes, from the burrowing of aquatic insects to the trampling of hippos. These ecosystem engineers have local impacts on benthic habitat and also strongly affect downstream fluxes of nutrients and other resources. The impacts of ecosystem engineers are most likely some function of their behavior, size, and population density, modulated by the abiotic conditions of the stream. In streams, subsidies often control the body size and density of ecosystem engineers, while hydrologic energy controls their distribution, density, and life-history attributes, the habitats they create, and the resources and organisms they affect. Because ecosystem engineers can profoundly affect stream ecosystems, and because they themselves can be significantly affected positively or negatively by human activities, understanding ecosystem engineering in streams is increasingly important for the management of these ecosystems.

JONATHAN W. MOORE (;)

2006-03-01

262

Strategies for Stream Classification Using GIS  

Microsoft Academic Search

Classification of streams into perennial, intermittent or ephemeral is necessary in certain fields. Environmental studies can benefit from a map showing stream classification. In addition, it is necessary to know the stream classification for issues like urban planning and permits. In this study, we developed strategies for stream classification using Geographic Information Systems (GIS). With public domain data, it was

Miguel Restrepo; Pamela Waisanen

263

THE DYNAMICS OF STAR STREAM GAPS  

SciTech Connect

A massive object crossing a narrow stream of stars orbiting in the halo of the galaxy induces velocity changes both along and transverse to the stream that can lead to the development of a visible gap. For a stream narrow relative to its orbital radius, the stream crossing time is sufficiently short that the impact approximation can be used to derive the changes in angular momenta and radial actions along the star stream. The epicyclic approximation is used to calculate the evolution of the density of the stream as it orbits around in a galactic potential. Analytic expressions are available for a point mass, however, the general expressions are easily numerically evaluated for perturbing objects with arbitrary density profiles. With a simple allowance for the velocity dispersion of the stream, moderately warm streams can be modeled. The predicted evolution agrees well with the outcomes of simulations of stellar streams for streams with widths up to 1% of the orbital radius of the stream. The angular momentum distribution within the stream shears out gaps with time, further reducing the visibility of streams, although the size of the shear effect requires more detailed simulations that account for the creation of the stream. An illustrative model indicates that shear will set a lower limit of a few times the stream width for the length of gaps that persist. In general, the equations are useful for dynamical insights into the development of stream gaps and their measurement.

Carlberg, R. G., E-mail: carlberg@astro.utoronto.ca [Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada)

2013-10-01

264

Unique Challenges to (Federal) Enterprise Streaming  

NASA Technical Reports Server (NTRS)

Enterprise streaming has different parameters than consumer Streaming. The government enterprise has some differences on top of that. I'd like to highlight some issues shared by the Federal government as a whole, with a closer look at streaming within NASA. Then we'll look at NASA's strategy for streaming.

Walls, Bryan

2006-01-01

265

Apple Education iTunes U User's Guide  

E-print Network

A list of courses and other content appears. What you can do with the courses listed depends on your using one of the following browsers: · Safari 2.0 or later on Mac · Internet Explorer 6.0 or later on Windows Note: Internet Explorer on Windows may have performance limitations when uploading files. For more

Li, Teng

266

Fuel-cell engine stream conditioning system  

DOEpatents

A stream conditioning system for a fuel cell gas management system or fuel cell engine. The stream conditioning system manages species potential in at least one fuel cell reactant stream. A species transfer device is located in the path of at least one reactant stream of a fuel cell's inlet or outlet, which transfer device conditions that stream to improve the efficiency of the fuel cell. The species transfer device incorporates an exchange media and a sorbent. The fuel cell gas management system can include a cathode loop with the stream conditioning system transferring latent and sensible heat from an exhaust stream to the cathode inlet stream of the fuel cell; an anode humidity retention system for maintaining the total enthalpy of the anode stream exiting the fuel cell related to the total enthalpy of the anode inlet stream; and a cooling water management system having segregated deionized water and cooling water loops interconnected by means of a brazed plate heat exchanger.

DuBose, Ronald Arthur (Marietta, GA)

2002-01-01

267

Living Wage Calculator  

NSDL National Science Digital Library

In many parts of the United States, families working in low-wage jobs make insufficient income to live locally given the high cost of living. Some of this can be due to rising real estate costs and the like and a number of organizations have worked to craft living wage legislation in a number of cities. This Living Wage calculator helps visitors estimate the cost of living in their community or region. Visitors can get started by selecting a location from the list presented here. Additionally, they can also use the search engine to look for specific places. For each place, visitors can learn about the living wage, typical expenses, and so on. It's an interesting policy tool and it can be used to teach students about economics, the job market, and much more.

Glasmeier, Amy

268

Improving P2P live-content delivery using SVC  

NASA Astrophysics Data System (ADS)

P2P content delivery techniques for video transmission have become of high interest in the last years. With the involvement of client into the delivery process, P2P approaches can significantly reduce the load and cost on servers, especially for popular services. However, previous studies have already pointed out the unreliability of P2P-based live streaming approaches due to peer churn, where peers may ungracefully leave the P2P infrastructure, typically an overlay networks. Peers ungracefully leaving the system cause connection losses in the overlay, which require repair operations. During such repair operations, which typically take a few roundtrip times, no data is received from the lost connection. While taking low delay for fast-channel tune-in into account as a key feature for broadcast-like streaming applications, the P2P live streaming approach can only rely on a certain media pre-buffer during such repair operations. In this paper, multi-tree based Application Layer Multicast as a P2P overlay technique for live streaming is considered. The use of Flow Forwarding (FF), a.k.a. Retransmission, or Forward Error Correction (FEC) in combination with Scalable video Coding (SVC) for concealment during overlay repair operations is shown. Furthermore the benefits of using SVC over the use of AVC single layer transmission are presented.

Schierl, T.; Snchez, Y.; Hellge, C.; Wiegand, T.

2010-07-01

269

Living with Cough  

MedlinePLUS

... Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Living With Clinical Trials Links Related Topics Pneumonia Asthma COPD Bronchitis Bronchiectasis Related Media Videos Quizzes Send a ...

270

Fish populations in Plynlimon streams  

NASA Astrophysics Data System (ADS)

In Plynlimon streams, brown trout (Salmo trutta L.) are widespread in the upper Wye at population densities of 0.03 to 0.32 fish m-2 and show evidence of successful recruitment in most years. In the upper Severn, brown trout are found only in an area of c. 1670 -2 downstream of Blaenhafren Falls at densities of 0.03 to 0.24 fish -2 and the evidence suggests very variable year to year success in recruitment (Crisp & Beaumont, 1996). Analyses of the data show that temperature differences between afforested and unafforested streams may affect the rates of trout incubation and growth but are not likely to influence species survival. Simple analyses of stream discharge data suggest, but do not prove, that good years for recruitment in the Hafren population were years of low stream discharge. This may be linked to groundwater inputs detected in other studies in this stream. More research is needed to explain the survival of the apparently isolated trout population in the Hafren.

Crisp, D. T.; Beaumont, W. R. C.

271

Streaming Compression of Hexahedral Meshes  

SciTech Connect

We describe a method for streaming compression of hexahedral meshes. Given an interleaved stream of vertices and hexahedral our coder incrementally compresses the mesh in the presented order. Our coder is extremely memory efficient when the input stream documents when vertices are referenced for the last time (i.e. when it contains topological finalization tags). Our coder then continuously releases and reuses data structures that no longer contribute to compressing the remainder of the stream. This means in practice that our coder has only a small fraction of the whole mesh in memory at any time. We can therefore compress very large meshes - even meshes that do not file in memory. Compared to traditional, non-streaming approaches that load the entire mesh and globally reorder it during compression, our algorithm trades a less compact compressed representation for significant gains in speed, memory, and I/O efficiency. For example, on the 456k hexahedra 'blade' mesh, our coder is twice as fast and uses 88 times less memory (only 3.1 MB) with the compressed file increasing about 3% in size. We also present the first scheme for predictive compression of properties associated with hexahedral cells.

Isenburg, M; Courbet, C

2010-02-03

272

SmartCapture: a compact video capture, encoding and streaming technology for UAVs  

Microsoft Academic Search

Live surveillance video is increasingly in demand on the battlefield to achieve Information Dominance, a critical DoD doctrine established long ago. With the increasing data transmit rate and range of the wireless device and development of Multi-hop Mobile Ad-hoc Network (MANet), real-time live video streaming from UAVs to the ground stations will move forward rapidly. UAVs of every size and

Wei Dai; Pankaj Topiwala

2008-01-01

273

Dynamic visualization of data streams  

DOEpatents

One embodiment of the present invention includes a data communication subsystem to receive a data stream, and a data processing subsystem responsive to the data communication subsystem to generate a visualization output based on a group of data vectors corresponding to a first portion of the data stream. The processing subsystem is further responsive to a change in rate of receipt of the data to modify the visualization output with one or more other data vectors corresponding to a second portion of the data stream as a function of eigenspace defined with the group of data vectors. The system further includes a display device responsive to the visualization output to provide a corresponding visualization.

Wong, Pak Chung (Richalnd, WA); Foote, Harlan P. (Richland, WA); Adams, Daniel R. (Kennewick, WA); Cowley, Wendy E. (Richland, WA); Thomas, James J. (Richland, WA)

2009-07-07

274

Streaming simplification of tetrahedral meshes.  

PubMed

Unstructured tetrahedral meshes are commonly used in scientific computing to represent scalar, vector, and tensor fields in three dimensions. Visualization of these meshes can be difficult to perform interactively due to their size and complexity. By reducing the size of the data, we can accomplish real-time visualization necessary for scientific analysis. We propose a two-step approach for streaming simplification of large tetrahedral meshes. Our algorithm arranges the data on disk in a streaming, I/O-efficient format that allows coherent access to the tetrahedral cells. A quadric-based simplification is sequentially performed on small portions of the mesh in-core. Our output is a coherent streaming mesh which facilitates future processing. Our technique is fast, produces high quality approximations, and operates out-of-core to process meshes too large for main memory. PMID:17093343

Vo, Huy T; Callahan, Steven P; Lindstrom, Peter; Pascucci, Valerio; Silva, Cludio T

2007-01-01

275

The StreamIt development tool : a programming environment for StreamIt  

E-print Network

StreamIt [28] is a high-level programming language intended for the development of large-scale and high-performance streaming applications that are characterized by the processing of data streams by modular structures. The ...

Kuo, Kimberly Sue, 1981-

2004-01-01

276

Molecules in Living Systems  

NSDL National Science Digital Library

This lesson explains the difference between molecules in living systems and inanimate objects. In living systems, atoms and molecules are organized to a much greater degree and provide the structure of the organism. Lipids, carbohydrates, proteins, and nucleic acids are also discussed.

2012-06-19

277

Empathetic living media  

Microsoft Academic Search

We describe a new form of interactive living media used to communicate social or ecological information in the form of an empathetic ambient media. In the fast paced modern world people are generally too busy to monitor various significant social or human aspects of their lives, such as time spent with their family, their overall health, state of the ecology,

Adrian David Cheok; Roger Thomas Kok; Chuen Tan; Owen Noel Newton Fernando; Tim Merritt; Janyn Yen Ping Sen

2008-01-01

278

Is It Living?  

ERIC Educational Resources Information Center

The word "living" is commonly used throughout elementary science lessons that focus on the biological world. It is a word teachers often take for granted when teaching life science concepts. How similar the constructed meaning of a common word like "living" is to the meaning intended by the teacher or instructional materials depends on how a

Keeley, Page

2011-01-01

279

Temperature of the Gulf Stream  

NASA Technical Reports Server (NTRS)

The Gulf Stream is one of the strong ocean currents that carries warm water from the sunny tropics to higher latitudes. The current stretches from the Gulf of Mexico up the East Coast of the United States, departs from North America south of the Chesapeake Bay, and heads across the Atlantic to the British Isles. The water within the Gulf Stream moves at the stately pace of 4 miles per hour. Even though the current cools as the water travels thousands of miles, it remains strong enough to moderate the Northern European climate. The image above was derived from the infrared measurements of the Moderate-resolution Imaging Spectroradiometer (MODIS) on a nearly cloud-free day over the east coast of the United States. The coldest waters are shown as purple, with blue, green, yellow, and red representing progressively warmer water. Temperatures range from about 7 to 22 degrees Celsius. The core of the Gulf Stream is very apparent as the warmest water, dark red. It departs from the coast at Cape Hatteras, North Carolina. The cool, shelf water from the north entrains the warmer outflows from the Chesapeake and Delaware Bays. The north wall of the Gulf Stream reveals very complex structure associated with frontal instabilities that lead to exchanges between the Gulf Stream and inshore waters. Several clockwise-rotating warm core eddies are evident north of the core of the Gulf Stream, which enhance the exchange of heat and water between the coastal and deep ocean. Cold core eddies, which rotate counter clockwise, are seen south of the Gulf Stream. The one closest to Cape Hatteras is entraining very warm Gulf Stream waters on its northwest circumference. Near the coast, shallower waters have warmed due to solar heating, while the deeper waters offshore are markedly cooler (dark blue). MODIS made this observation on May 8, 2000, at 11:45 a.m. EDT. For more information, see the MODIS-Ocean web page. The sea surface temperature image was created at the University of Miami using the 11- and 12-micron bands, by Bob Evans, Peter Minnett, and co-workers.

2002-01-01

280

Characteristics of Living Things  

NSDL National Science Digital Library

Welcome to an internet program that is all about life. Just what is life? This seems like a strange question. We all know what is meant by the word \\"life\\". But how do we define it? Are all living things alike? In this internet program, you will watch several short movies and some slides. After you see each movie and slide, you will write something about the movie and slide. Our learning goal is to make a list of the traits that all living things have in common. Get out a pencil and a piece of paper. We are off on a great adventure to learn about living things! This first movie is called, \\"Is It Alive?\\" It will help you begin thinking about living things and what they all have in common. Write on your paper: \\"Living Things\\". As you watch this movie, write the names of the things that you think are alive. Copy the ...

Melenson, Richard S.

2005-11-21

281

Where the Hippopotamus Lives.  

ERIC Educational Resources Information Center

During their environmental education year, 12-year-old students from Treverton Preparatory School (Natal, South Africa) learn all subjects in an environmental manner. The central theme streaming through the internationally recognized program is the Mooi River. A three-day camping trip and other outdoor activities are included. (MH)

Richard, Don

1983-01-01

282

Riparian influences on stream fish assemblage structure in urbanizing streams  

USGS Publications Warehouse

We assessed the influence of land cover at multiple spatial extents on fish assemblage integrity, and the degree to which riparian forests can mitigate the negative effects of catchment urbanization on stream fish assemblages. Riparian cover (urban, forest, and agriculture) was determined within 30 m buffers at longitudinal distances of 200 m, 1 km, and the entire network upstream of 59 non-nested fish sampling locations. Catchment and riparian land cover within the upstream network were highly correlated, so we were unable to distinguish between those variables. Most fish assemblage variables were related to % forest and % urban land cover, with the strongest relations at the largest spatial extent of land cover (catchment), followed by riparian land cover in the 1-km and 200-m reach, respectively. For fish variables related to urban land cover in the catchment, we asked whether the influence of riparian land cover on fish assemblages was dependent on the amount of urban development in the catchment. Several fish assemblage metrics (endemic richness, endemic:cosmopolitan abundance, insectivorous cyprinid richness and abundance, and fluvial specialist richness) were all best predicted by single variable models with % urban land cover. However, endemic:cosmopolitan richness, cosmopolitan abundance, and lentic tolerant abundance were related to % forest cover in the 1-km stream reach, but only in streams that had <15% catchment urban land cover. In these cases, catchment urbanization overwhelmed the potential mitigating effects of riparian forests on stream fishes. Together, these results suggest that catchment land cover is an important driver of fish assemblages in urbanizing catchments, and riparian forests are important but not sufficient for protecting stream ecosystems from the impacts of high levels of urbanization.

Roy, A.H.; Freeman, B.J.; Freeman, M.C.

2007-01-01

283

QoS-based real-time audio streaming in IPv6 networks  

NASA Astrophysics Data System (ADS)

Live audio streaming is an important component of Internet multimedia. The currently deployed Internet offers poor support for such streams due to the lack of QoS capabilities. However, IPv6, the new Internet Protocol has now included provision for QoS. The introduction of a flow label in the protocol header is intended to enable classification of packets according to their destination and service. Reservation protocols such as RSVP can make use of this stream identifier to reserve resources for particular streams in the routers along the transport path. This paper explores the effectiveness of resource reservation in IPv6 networks for live audio streaming. An important area for investigation is whether there is an efficiency gain due to the employment of low level flow labels. The paper summarizes the result of our extensive measurements and comparisons with currently deployed technologies. Specific attention is paid to the performance characteristics of real time applications, notably the delay, jitter and bandwidth. The results are based on a specially developed audio streaming application which enables RSVP over IPv6 using flow labels. Since the integration of RSVP in IPv6 is still work-in-progress, we had to modify the currently available RSVP implementation in order to access the IPv6 flow label. For audio data transport, we use the real-time transport protocol (RTP). The real-time transport control protocol, known as the feedback channel of RTP, forms with its receiver reports the basis of our benchmark tests.

Schmid, Stefan; Scott, Andrew C.; Hutchison, David; Froitzheim, Konrad

1998-12-01

284

Steganography in Compressed Video Stream  

Microsoft Academic Search

In this paper, a steganographic algorithm in MPEG compressed video stream was proposed. In each GOP, the control information for to facilitate data extraction was embedded in I frame, in P frames and B frames, the actually transmitted data were repeatedly embedded in motion vectors of macro-blocks that have larger moving speed, for to resist video processing. Data extraction was

Changyong Xu; Xijian Ping; Tao Zhang

2006-01-01

285

ALIENS IN WESTERN STREAM ECOSYSTEMS  

EPA Science Inventory

The USEPA's Environmental Monitoring and Assessment Program conducted a five year probability sample of permanent mapped streams in 12 western US states. The study design enables us to determine the extent of selected riparian invasive plants, alien aquatic vertebrates, and some ...

286

POPULATION DECLINE IN STREAM FISH  

EPA Science Inventory

Over half of the streams in the Mid-Atlantic Highlands have fish communities that are in fair or poor condition, and the EPA concluded that physical habitat alteration represents the greatest potential stressor across this region. A quantitative method for relating habitat quali...

287

Molten Rock Streaming into Water  

USGS Multimedia Gallery

The molten rock streams through an opening in the melter into a large container of water below, where it instantly cools into glass. __________ The USGS has created man-made moon dirt, or regolith, to help NASA prepare for upcoming moon explorations. Four tons of the simulant is expected to be mad...

2009-05-26

288

Characterization of gluten processing streams.  

PubMed

Corn gluten meal (CGM) is a major coproduct of corn wet milling; it has value because of high protein. However, variation in composition and high P content reduce market value. Data that characterize gluten streams would be helpful in identifying key processing steps that could be modified to improve the quality of CGM and increase processing efficiency. Few data are published in the literature on the detailed composition of gluten processing streams. The objective was to characterize the gluten process streams in a corn wet milling plant. Samples were obtained from one plant over a six month period and analyzed for dry matter (DM), total N (protein), ash and elements. DM and macroelement content of the streams were increased significantly during processing. Ash, priority pollutant elements and microelement concentrations were low and of little concern. About 38% of the N (protein) in light gluten was not recovered in the CGM; most of this was lost at the gluten thickener step into the gluten thickener overflow. Much of the P also was removed at this step. Modification of the gluten thickener overflow to increase N and reduce P could make CGM a more valuable coproduct and improve processing efficiency. PMID:12699935

Rausch, K D; Thompson, C I; Belyea, R L; Clevenger, T E; Tumbleson, M E

2003-09-01

289

Texas Stream Team Special Projects  

E-print Network

State Park · Oso and Petronila Creeks-Mustang Island State Park · Arroyo Colorado-Estero Llano Grande press · Teaching environmental sciences · Maps on Stream Team Web site Oso And Petronila Creeks Mustang Island State Park Oso and Petronila Creeks Mustang Island State Park · Monitor training · NPS education

290

What Causes the Gulf Stream?  

NSDL National Science Digital Library

This video segment adapted from NOVA visualizes how Earth's rotation and uneven heating from the Sun cause prevailing winds and influence ocean surface currents. An animation and infrared satellite image illustrate the shape and direction of the Gulf Stream System in the Atlantic Ocean.

Foundation, Wgbh E.

2005-12-17

291

MPEG streaming over mobile Internet  

NASA Astrophysics Data System (ADS)

MPEG streaming over Mobile Internet leads to degradation of MPEG video quality. When a handoff of a mobile node (MN) occurs, it is quite difficult to guarantee seamless video quality due to the change of routing path towards the MN. In this paper, we propose a new scheme, MPEG streaming over Concatenation and Optimization for Reservation Path (CORP), to guarantee QoS of MPEG streaming service in the Mobile Internet. When a handoff of a MN occurs, the CORP extends the existing reservation path, which was established using RSVP between a server and a MN, to a new Base Station (BS) that the MN currently connected to, instead of making a new RSVP session between the server and the MN. To demonstrate practicality of the proposed scheme, we built a prototype system which provides the MPEG-1 Video and Audio on demand over Mobile Internet using Mobile IP and IEEE 802.11b wireless LAN. Our experiment shows that the proposed scheme significantly improves the peak signal-to-noise rate (PSNR) of MPEG streaming video. Also, we analyzed the video quality of our scheme with respect to TCP and UDP transport protocols.

Lee, Myungjin; Lee, Kyounghee; Thang, Truong C.; Thanh, Nguyen N.; Kim, MyungChul; Ro, Yong M.; Lee, Jong H.

2002-04-01

292

Submicron particles in meteor streams  

NASA Technical Reports Server (NTRS)

Submicron particles (mass less than 10 to the -15th g) were observed in certain meteor streams by impact detectors on satellite Explorer 46. This unexpected finding leads to conclusions about the nature and origin of the particles and about the importance of nongravitational forces.

Singer, S. F.; Stanley, J. E.

1980-01-01

293

Pennsylvania Stream Water Treatment Systems  

NSDL National Science Digital Library

The video asks who will be around to keep water treatment systems going, monitor the quality of streams, and create new initiatives to keep water sources clean. A number of programs address these issues and get young people involved in environmental and conservation activities.

Wpsu

2007-04-04

294

Chemical quality of Michigan streams  

USGS Publications Warehouse

Concentrations of chemical constituents of Michigan streams exhibit regional patterns that are primarily a function of geology and evapotranspiration. However, in some areas waste disposal by municipal and industrial organizations has altered the natural distribution and concentrations of dissolved material. Concentration and areal distribution of chemical constitutents were found to change very little from high spring to low summer flow conditions.

Wood, Warren W.

1970-01-01

295

4, 24252460, 2007 Stream temperature  

E-print Network

increased phytoplankton growth and oxygen deficits. Water warming20 decreased dissolved oxygen, increased, which controls dilution and residence times, or in water temperature. When the latter increases, oxygenHESSD 4, 2425­2460, 2007 Stream temperature & climate change impact on water quality A. Ducharne

Paris-Sud XI, Université de

296

Frequency response of ice streams  

PubMed Central

Changes at the grounding line of ice streams have consequences for inland ice dynamics and hence sea level. Despite substantial evidence documenting upstream propagation of frontal change, the mechanisms by which these changes are transmitted inland are not well understood. In this vein, the frequency response of an idealized ice stream to periodic forcing in the downstream strain rate is examined for basally and laterally resisted ice streams using a one-dimensional, linearized membrane stress approximation. This reveals two distinct behavioural branches, which we find to correspond to different mechanisms of upstream velocity and thickness propagation, depending on the forcing frequency. At low frequencies (centennial to millennial periods), slope and thickness covary hundreds of kilometres inland, and the shallow-ice approximation is sufficient to explain upstream propagation, which occurs through changes in grounding-line flow and geometry. At high frequencies (decadal to sub-decadal periods), penetration distances are tens of kilometres; while velocity adjusts rapidly to such forcing, thickness varies little and upstream propagation occurs through the direct transmission of membrane stresses. Propagation properties vary significantly between 29 Antarctic ice streams considered. A square-wave function in frontal stress is explored by summing frequency solutions, simulating some aspects of the dynamical response to sudden ice-shelf change. PMID:23197934

Williams, C. Rosie; Hindmarsh, Richard C. A.; Arthern, Robert J.

2012-01-01

297

Stream velocity Investigation using Inquiry  

NSDL National Science Digital Library

This activity is a field investigation using science inquiry and problem solving, where small groups of students design their own experiment to determine stream velocity, collect and analyze their data, draw conclusions, and make further inferences based group discussion/collaboration.

298

The role of red alder in riparian forest structure along headwater streams in southeastern Alaska  

USGS Publications Warehouse

We assessed the influence of red alder on tree species composition, stand density, tree size distribution, tree mortality, and potential for producing large conifers, in 38-42 yr old riparian forests along 13 headwater streams in the Maybeso and Harris watersheds on Prince of Wales Island, Alaska. Red alder ranged from 0 to 53% of the total live basal area of the stands. Tree density, basal area of live and dead trees, and mean diameter of live conifers were not significantly related to the percent of alder as a proportion of total stand live basal area within these riparian forests. The mean diameter of the 100 largest conifers per hectare (the largest trees) was similar among different sites and appeared unrelated to the amount of alder in the stands. The mean diameter of dead conifers increased slightly with increasing proportion of red alder. Most dead trees were small and died standing. Red alder was much more concentrated immediately along stream margins (within 0-1 m distance from the stream bank vs. > 1 m). The presence of red alder did not inhibit the production of large-diameter conifers, and both alder and conifers provided small woody debris for fishless headwater streams in southeastern Alaska. Red alder is an important structural component of young-growth riparian stands.

Orlikowska, E.H.; Deal, R.L.; Hennon, P.E.; Wipfli, M.S.

2004-01-01

299

A Semi-Markovian Individual Model of Users for P2P Video Streaming Applications  

Microsoft Academic Search

P2P-based live video streaming has become one of the major applications on the Internet. Due to the importance of the user behavior in these systems, intensive measurement studies have been performed over them in order to provide global models. However, in real networks the individual user behavior does not necessarily follow the global or average behavior. As the measurement studies

Gregory Bonnet; Ihsan Ullah; Guillaume Doyen; Lionel Fillatre; Dominique Gaiti; Igor Nikiforov

2011-01-01

300

Extracting Places from Location Data Streams1 Falko Schmid and Kai-Florian Richter  

E-print Network

Extracting Places from Location Data Streams1 Falko Schmid and Kai-Florian Richter Transregional. However, in every day live we usually perform wayfinding tasks in partial (not every place and path route directions and maps based on the individual reference frame: a user's meaningful places and paths

Bremen, Universität

301

Aeroacoustics of Three-Stream Jets  

NASA Technical Reports Server (NTRS)

Results from acoustic measurements of noise radiated from a heated, three-stream, co-annular exhaust system operated at subsonic conditions are presented. The experiments were conducted for a range of core, bypass, and tertiary stream temperatures and pressures. The nozzle system had a fan-to-core area ratio of 2.92 and a tertiary-to-core area ratio of 0.96. The impact of introducing a third stream on the radiated noise for third-stream velocities below that of the bypass stream was to reduce high frequency noise levels at broadside and peak jet-noise angles. Mid-frequency noise radiation at aft observation angles was impacted by the conditions of the third stream. The core velocity had the greatest impact on peak noise levels and the bypass-to-core mass flow ratio had a slight impact on levels in the peak jet-noise direction. The third-stream jet conditions had no impact on peak noise levels. Introduction of a third jet stream in the presence of a simulated forward-flight stream limits the impact of the third stream on radiated noise. For equivalent ideal thrust conditions, two-stream and three-stream jets can produce similar acoustic spectra although high-frequency noise levels tend to be lower for the three-stream jet.

Henderson, Brenda

2012-01-01

302

Living things and non-living things interact  

NSDL National Science Digital Library

Living things and non-living things interact on a daily basis. The man is a human, a living thing. The corn crop and grass are also living things. The soil that the grass and corn crops are rooted in is a non-living thing.

Ken Hammond (USDA-ARS;)

2006-05-23

303

Dynamical Modelling of Meteoroid Streams  

NASA Astrophysics Data System (ADS)

Accurate simulations of meteoroid streams permit the prediction of stream interaction with Earth, and provide a measure of risk to Earth satellites and interplanetary spacecraft. Current cometary ejecta and meteoroid stream models have been somewhat successful in predicting some stream observations, but have required questionable assumptions and significant simplifications. Extending on the approach of Vaubaillon et al. (2005)1, we model dust ejection from the cometary nucleus, and generate sample particles representing bins of distinct dynamical evolution-regulating characteristics (size, density, direction, albedo). Ephemerides of the sample particles are integrated and recorded for later assignment of frequency based on model parameter changes. To assist in model analysis we are developing interactive software to permit the turning of knobs of model parameters, allowing for near-real-time 3D visualization of resulting stream structure. With this tool, we will revisit prior assumptions made, and will observe the impact of introducing non-uniform cometary surface attributes and temporal activity. The software uses a single model definition and implementation throughout model verification, sample particle bin generation and integration, and analysis. It supports the adjustment with feedback of both independent and independent model values, with the intent of providing an interface supporting multivariate analysis. Propagations of measurement uncertainties and model parameter precisions are tracked rigorously throughout. We maintain a separation of the model itself from the abstract concepts of model definition, parameter manipulation, and real-time analysis and visualization. Therefore we are able to quickly adapt to fundamental model changes. It is hoped the tool will also be of use in other solar system dynamics problems. 1 Vaubaillon, J.; Colas, F.; Jorda, L. (2005) A new method to predict meteor showers. I. Description of the model. Astronomy and Astrophysics, Volume 439, Issue 2, August IV 2005, pp.751-760.

Clark, David; Wiegert, P. A.

2012-10-01

304

The GOES-R Rebroadcast (GRB) Data Stream Simulator  

NASA Astrophysics Data System (ADS)

GOES Rebroadcast (GRB) signals in the GOES-R era will replace the current legacy GOES Variable (GVAR) signal and will have substantially different characteristics, including a change in data rate from a single 2.1 Mbps stream to two digital streams of 15.5 Mbps each. Five GRB Simulators were developed as portable systems that output a high-fidelity stream of Consultative Committee for Space Data Systems (CCSDS) formatted GRB packet data equivalent to live GRB data. The data are used for on-site testing of user ingest and data handling systems known as field terminal sites. The GRB Simulator is a fully self-contained system which includes all software and hardware units needed for operation. The operator manages configurations to edit preferences, define individual test scenarios, and manage event logs and reports. Simulations are controlled by test scenarios, which are scripts that specify the test data and provide a series of actions for the GRB Simulator to perform when generating GRB output. Scenarios allow for the insertion of errors or modification of GRB packet headers for testing purposes. The GRB Simulator provides a built-in editor for managing scenarios. The GRB Simulator provides GRB data as either baseband (digital) or Intermediate Frequency (IF) output to the test system. GRB packet data are sent in the same two output streams used in the operational system: one for Left Hand Circular Polarization (LHCP) and one for Right Hand Circular Polarization (RHCP). Use of circular polarization in the operational system allows the transmitting antenna to multiplex the two digital streams into the same signal, thereby doubling the available bandwidth. The GRB Simulator is designed to be used at sites that receive the GRB downlink.

Dittberner, G. J.; Gibbons, K.; Czopkiewicz, E.; Miller, C.; Brown-Bergtold, B.; Haman, B.; Marley, S.

2013-12-01

305

ViSUS: Visualization Streams for Ultimate Scalability  

SciTech Connect

In this project we developed a suite of progressive visualization algorithms and a data-streaming infrastructure that enable interactive exploration of scientific datasets of unprecedented size. The methodology aims to globally optimize the data flow in a pipeline of processing modules. Each module reads a multi-resolution representation of the input while producing a multi-resolution representation of the output. The use of multi-resolution representations provides the necessary flexibility to trade speed for accuracy in the visualization process. Maximum coherency and minimum delay in the data-flow is achieved by extensive use of progressive algorithms that continuously map local geometric updates of the input stream into immediate updates of the output stream. We implemented a prototype software infrastructure that demonstrated the flexibility and scalability of this approach by allowing large data visualization on single desktop computers, on PC clusters, and on heterogeneous computing resources distributed over a wide area network. When processing terabytes of scientific data, we have achieved an effective increase in visualization performance of several orders of magnitude in two major settings: (i) interactive visualization on desktop workstations of large datasets that cannot be stored locally; (ii) real-time monitoring of a large scientific simulation with negligible impact on the computing resources available. The ViSUS streaming infrastructure enabled the real-time execution and visualization of the two LLNL simulation codes (Miranda and Raptor) run at Supercomputing 2004 on Blue Gene/L at its presentation as the fastest supercomputer in the world. In addition to SC04, we have run live demonstrations at the IEEE VIS conference and at invited talks at the DOE MICS office, DOE computer graphics forum, UC Riverside, and the University of Maryland. In all cases we have shown the capability to stream and visualize interactively data stored remotely at the San Diego Supercomputing Center or monitor in real-time simulation codes executed on a cluster of PC's at LLNL.

Pascucci, V

2005-02-14

306

COMMUNITY PHOTOSYNTHESIS AND RESPIRATION IN EXPERIMENTAL STREAMS  

EPA Science Inventory

Changes in relative contribution to total stream photosynthetic and respiratory rates by various community components of an open channel stream were estimated. Rates of photosynthetic production of plankton, benthos and macrophytes (with associated epiphytes) were followed throug...

307

Language and compiler support for stream programs  

E-print Network

Stream programs represent an important class of high-performance computations. Defined by their regular processing of sequences of data, stream programs appear most commonly in the context of audio, video, and digital ...

Thies, William Frederick, 1978-

2009-01-01

308

Introduction Importance of temperature in streams  

E-print Network

Department, Office of Watersheds, Philadelphia PA 19107, USA #12;and riparian vegetation radiation, airIntroduction Importance of temperature in streams Stream temperature affects microfauna survival, fish reproduction, and aquatic metabolism rates. Nearly every species is temperature sensitive

Toran, Laura

309

Modeling the scalability of acrylic stream programs  

E-print Network

Despite the fact that the streaming application domain is becoming increasingly widespread, few studies have focused specifically on the performance characteristics of stream programs. We introduce two models by which the ...

Wong, Jeremy Ng, 1981-

2004-01-01

310

Removal of hydrogen sulfide from gas streams  

SciTech Connect

Hydrogen sulfide is removed from a gas stream by contacting the gas stream with an aqueous alkanolamine solution in a high surface area rotor. The solution is subjected to an acceleration greater than that due to gravity. 16 claims.

Toms, D.J.

1983-10-03

311

Stream Channelization: Conflict Between Ditchers, Conservationists  

ERIC Educational Resources Information Center

Summarizes the argument between the advocates of stream straightening for flood control, drainage, and navigation, and those concerned with the maintenance of ecological communities and the aesthetic values of natural" streams. (AL)

Gillette, Robert

1972-01-01

312

Living with Cardiomyopathy  

MedlinePLUS

... Cardiomyopathy Explore Cardiomyopathy What Is ... Types Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics Heart Failure Arrhythmia Heart Valve Disease Sudden Cardiac Arrest Heart Murmur Related Media ...

313

Pathways to Assisted Living  

PubMed Central

This article examines how race and class influence decisions to move to assisted living facilities. Qualitative methods were used to study moving decisions of residents in 10 assisted living facilities varying in size and location, as well as race and socioeconomic status of residents. Data were derived from in-depth interviews with 60 residents, 43 family members and friends, and 12 administrators. Grounded theory analysis identified three types of residents based on their decision-making control: proactive, compliant, and passive/resistant. Only proactive residents (less than a quarter of residents) had primary control. Findings show that control of decision making for elders who are moving to assisted living is influenced by class, though not directly by race. The impact of class primarily related to assisted-living placement options and strategies available to forestall moves. Factors influencing the decision-making process were similar for Black and White elders of comparable socioeconomic status. PMID:19756172

Ball, Mary M.; Perkins, Molly M.; Hollingsworth, Carole; Whittington, Frank J.; King, Sharon V.

2009-01-01

314

Living with Fanconi Anemia  

MedlinePLUS

... from the NHLBI on Twitter. Living With Fanconi Anemia Improvements in blood and marrow stem cell transplants ... FA can be costly). Rate This Content: Fanconi Anemia Clinical Trials Clinical trials are research studies that ...

315

Living with Anemia  

MedlinePLUS

... page from the NHLBI on Twitter. Living With Anemia Often, you can treat and control anemia. If ... by an inherited or chronic disease or trauma. Anemia and Children/Teens Infants and young children have ...

316

Living with Kawasaki Disease  

MedlinePLUS

... Tumblr. Share this page from the NHLBI on Twitter. Living With Kawasaki Disease Most children who have Kawasaki disease recoverusually within weeks of getting symptoms. Further problems are rare. Early treatment reduces the risk of ...

317

Living Now: For Parents  

MedlinePLUS

... Match. Each issue of Living Now addresses various aspects of life after transplant. This collection of observations, ... emotional support Prepare your child for the social aspects of returning to school Keep other family members, ...

318

Assisted Living Resident Profile  

MedlinePLUS

... NCAL NCAL Membership State Affiliates of NCAL NCAL Governance Faces of Assisted Living News & Media News Releases ... NCAL NCAL Membership State Affiliates of NCAL NCAL Governance NCAL Committees NCAL Staff News & Media News Releases ...

319

Administration for Community Living  

MedlinePLUS

... Self-Management Empowers Healthy Aging (09/22/2014) News and Information (view full listing) Technical Assistance on the Independent Living Programs and Informational Update regarding the Transition ...

320

Living with Bronchopulmonary Dysplasia  

MedlinePLUS

... from the NHLBI on Twitter. Living With Bronchopulmonary Dysplasia Caring for a premature infant can be challenging. ... Care and Health Issues Infants who have bronchopulmonary dysplasia (BPD) may have health problems even after they ...

321

Living and Nonliving  

NSDL National Science Digital Library

What is it that distinguishes a living organism from a nonliving object? This collection of images presents examples that aren't as clear-cut as one might think, enticing students to question the meaning of life.

Foundation, Wgbh E.

2003-09-26

322

Next Generation Living  

E-print Network

of mechanical systems, and our perceived outlook of sustainability can collaborate and aid each other toward sustainable architecture. This collaboration will take form through the proposal or a living and learning community for the students and faculty of Texas...

Vaughn, Caroline Elizabeth

2013-02-06

323

The Living Cosmos  

NASA Astrophysics Data System (ADS)

Preface; 1. The unfinished revolution; 2. Life's origins; 3. Extreme life; 4. Shaping evolution; 5. Living in the Solar System; 6. Distant worlds; 7. Are we alone?; Notes; Glossary; Reading list; Media resources; Illustration credits; Index.

Impey, Chris

2011-06-01

324

Living with Hearing Loss  

MedlinePLUS

... Issues Special Section: Focus on Communication Living with Hearing Loss Past Issues / Fall 2008 Table of Contents ... family, including dad Bob, have adapted to her hearing impairment. Photo courtesy of Stefan Radtke, www.stefanradtke. ...

325

Healthy Living after Stroke  

MedlinePLUS

Healthy Living After Stroke Nutrition Good nutrition is one way to reduce your risk of having another stroke. Find ... was last reviewed on 04/30/2014. My Life Check To find out where you stand with ...

326

Living in the moment.  

PubMed

In a society that is probably the most fast-paced and frenetic society on earth, the practice of medicine is arguably among the most hectic professions. For many physicians, patient loads are increasing and hours are growing longer. Less time is being spent with patients because more time must be spent hassling with business matters and dealing with third-party payors. Our work lives are scheduled and then overscheduled, leaving less time and energy for personal lives. PMID:16296206

Krishna, R Murali

2005-10-01

327

Living Stock Collections (LSC)  

NSF Publications Database

The Living Stock Collections (LSC) program supports operation of and improvements in outstanding collections of living organisms used in basic biological research. The program provides support for two types of projects. Full Proposal Preparation Instructions: This solicitation contains information that supplements the standard Grant Proposal Guide (GPG) proposal preparation guidelines. More comprehensive information on NSF Award Conditions is contained in the NSF Grant Policy Manual (GPM) ...

328

Multichannel video streaming server for surveillance systems  

Microsoft Academic Search

In this paper we describe an architecture for a multi-client, multi-channel video streaming server targeted at the security market. To obtain scalability in bit-rate, multiple compressed video streams are available for each video channel. For transmission to the user, one stream has to be selected for each video channel. Parameters and cost functions to derive the optimal set of streams

R. G. J. Wijnhoven; E. G. T. Jaspers

2004-01-01

329

Time of travel of selected Arkansas streams  

USGS Publications Warehouse

Between 1971 and 1981, time-of-travel and dispersion measurements were made in 15 streams in Arkansas. Most of the streams studied were at or near base flow. Graphs are presented for predicting traveltime of solutes in segments of the streams studied. The relationship of time of passage and peak unit concentration to traveltime is presented for two of the streams. Examples of use and application of the data are given. (USGS)

Lamb, T. E.

1982-01-01

330

Semantic annotation for live and posterity logging of video documents  

NASA Astrophysics Data System (ADS)

Broadcasters usually envision two basic applications for video databases: Live Logging and Posterity Logging. The former aims at providing effective annotation of video in quasi-real time and supports extraction of meaningful clips from the live stream; it is usually performed by assistant producers working at the same location of the event. The latter provides annotation for later reuse of video material and is the prerequisite for retrieval by content from video digital libraries; it is performed by trained librarians. Both require that annotation is performed, at a great extent, automatically. Video information structure must encompass both low-intermediate level video organization and event relationships that define specific highlights and situations. Analysis of the visual data of the video stream permits to extract hints, identify events and detect highlights. All of this must be supported by a-priori knowledge of the video domain and effective reasoning engines capable to capture the inherent semantics of the visual events.

Bertini, Marco; Del Bimbo, Alberto; Nunziati, W.

2003-06-01

331

Stream Gauges and Satellite Measurements  

NASA Astrophysics Data System (ADS)

Satellite measurements should not be viewed as a replacement for stream gauges. However, occasionally it is suggested that because satellite-based measurements can provide river discharge, a motivation for satellite approaches is an increasing lack of stream gauges. This is an argument for more stream gauges, but not necessarily for satellite measurements. Rather, in-situ and spaceborne methods of estimating discharge are complementary. Stream gauges provide frequent measurements at one point in the river reach whereas satellites have the potential to measure throughout all reaches but at orbital repeat intervals of days to weeks. The Surface Water and Ocean Topography satellite mission (SWOT) is an opportunity to further develop these complements. The motivation for SWOT, and indeed for any satellite based method of estimating discharge, should not be as a replacement for stream gauges. Scientific and application uses should motivate the measurements. For example, understanding floods with their dynamic water surfaces are best sampled from remote platforms that provide water surface elevations throughout the floodwave. As another example, todays water and energy balance models are giving outputs at increasing spatial resolution and are making use of water surface elevations throughout the modeled basin. These models require a similar resolution in the calibrating and validating observations. We should also be aware of practical limitations. In addition to providing spatially distributed hydrodynamic measurements on rivers, SWOT will be able to measure storage changes in the estimated 30 million lakes in the world that are larger than a hectare. Knowing the storage changes in these lakes is especially important in certain regions such as the Arctic but gauging even a small fraction of these is impractical. Another motivator for satellite methods is that even in the presence of stream gauges, discharge data is not always well shared throughout all countries within an international river basin (this is also an argument for better diplomacy). Essentially, where gauges exist, satellite measurements allow the spatial extension of in-situ observations, especially when jointly combined in models such as data assimilation methods. The opportunity for new hydrologic science and discovery is enhanced when the strengths of traditional and new measurements are combined.

Alsdorf, D. E.

2010-12-01

332

Stream Succession: Channel Changes After Wildfire Disturbance  

Microsoft Academic Search

One paradigm in geomorphology is that vegetation is a fundamental control on sediment and water supplies to streams, and therefore on downstream geomorphology. Within this paradigm, wildfire has been implicated as a major driving force behind landscape erosion and changes to stream channels, periodically yielding pulses of sediment from upland basins, which, in turn, hypothetically, drive cyclical changes to stream

N. E. Scheidt; C. H. Luce; J. M. Buffington; B. Rieman; T. Black

2004-01-01

333

Understanding Internet Traffic Streams: Dragonflies and Tortoises  

E-print Network

Understanding Internet Traffic Streams: Dragonflies and Tortoises Nevil Brownlee CAIDA, SDSC, UC sites. We find that although most streams (about 45% of them) are dragonflies, lasting less than 2 15 minutes. We point out that streams can be classified not only by lifetime (dragonflies

California at San Diego, University of

334

Network Characteristics of Video Streaming Traffic  

Microsoft Academic Search

Video streaming represents a large fraction of Internet traffic. Surprisingly, little is known about the network characteristics of this traffic. In this paper, we study the network characteristics of the two most popular video streaming services, Netflix and YouTube. We show that the streaming strategies vary with the type of the application (Web browser or native mobile application), and the

Ashwin Rao; Yeon-Sup Lim; Chadi Barakat; Arnaud Legout; Don Towsley; Walid Dabbous

2011-01-01

335

Magnetic propulsion along an orbiting grain stream  

Microsoft Academic Search

If a stream of grains is in orbit about a central body such as the sun, a vehicle could accelerate along the stream using magnetic propulsion. After reaching a high velocity, i.e., a significant fraction of the speed of light, the vehicle could reach the end of the stream and enter free space. Although such a system would require investments

B. A. Lebon

1986-01-01

336

Forward XPath rewriting over XML data streams  

Microsoft Academic Search

Streaming XML data is often encountered in applications in medical biology. So, how to effectively manage and query XML data streams can be a fundamental issue for the quality of those medical biology applications. With respect to current methods for XPath query evaluation over XML data streams, adoption of some query rewriting techniques are common when encountering some complex query

Lixiang Qiao; Zhimin Yang; Chi Yang; Kaijun Ren; Le Yu; Chang Liu

2009-01-01

337

Maximum power from a hot stream  

Microsoft Academic Search

This paper reports the solution to the fundamental problem of how to maximize the mechanical power extracted from a hot single-phase stream when the total heat transfer area bathed by the stream is constrained. It is shown that the optimization has two degrees of freedom: the shape of the stream temperature distribution as a function of the length (x) traveled

A. Bejan; M. R. Errera

1998-01-01

338

Process for purifying hydrocarbon gas streams  

Microsoft Academic Search

An improved process is described for separating gaseous materials from a mixture containing the same. The process is particularly useful for the separation of high concentrations of nitrogen or similar low boiling materials from hydrocarbon streams such as natural gas and comprises the steps of first liquifying a portion of said gas stream and thereafter separating said stream into a

1977-01-01

339

The Stream Table in Physical Geography Instruction.  

ERIC Educational Resources Information Center

Outlines a number of activities to be conducted with a stream table (large wooden box filled with sediment and designed for water to pass through) in class. Activities illustrate such fluvial processes as stream meandering, erosion, transportation, and deposition. Includes a diagram for constructing a stream table. (MJP)

Wikle, Thomas A.; Lightfoot, Dale R.

1997-01-01

340

Amino Acids Dissolved in Stream Water as Possible Home Stream Odorants for Masu Salmon  

Microsoft Academic Search

It is well established that salmon return to their home stream by sensing the odors of the stream water. In this study we have attempted to identify the home stream odorants used by masu salmon in Lake Toya. The salmon in Lake Toya return to the home stream which flows into the lake after lake life for 2-3 years. Besides

Takayuki Shoji; Hiroshi Ueda; Toshio Ohgami; Takanori Sakamoto; Yoshihisa Katsuragi; Kohei Yamauchi; Kenzo Kurihara

2000-01-01

341

Drought effect on stream morphology and brook trout ( Salvelinus fontinalis ) populations in forested headwater streams  

Microsoft Academic Search

We assessed the effect of a severe drought in 1999 upon stream morphology and brook trout (Salvelinus fontinalis) populations in seven headwater streams in the Greenbrier and Potomac River watersheds, West Virginia. During the drought, stream discharge was 96% lower than in years of normal precipitation. As a result, habitat availability and quality over all study streams was significantly lower.

James P. Hakala; Kyle J. Hartman

2004-01-01

342

Effect of Stream Impoundment in Tennessee on the Fish Populations of Tributary Streams  

Microsoft Academic Search

Data from a statewide survey of warm water streams in Tennessee were used to determine the extent to which gizzard shad (Dorosoma cepedianum), carp (Cyprinus carpio), smallmouth buffalo (Ictiobus bubalus), and drum (Aplodinotus grunniens) inhabit smallmouth bass-rock bass streams. Reproduction of those species in tributary streams was minor or absent. By comparing samples from streams that were accessible from an

C. E. Ruhr

1957-01-01

343

Where Did All the Streams Go? Effects of Urbanization on Hydrologic Permanence of Headwater Streams  

EPA Science Inventory

Headwater streams represent a majority (up to 70%) of the stream length in the United States; however, these small streams are often piped or filled to accommodate residential, commercial, and industrial development. Legal protection of headwater streams under the Clean Water Ac...

344

Submission to ECRYPT call for stream ciphers: the self-synchronizing stream cipher Mosquito  

E-print Network

Submission to ECRYPT call for stream ciphers: the self-synchronizing stream cipher Mosquito Joan-oriented self-synchronizing stream cipher Mosquito and the underlying cipher architecture and provide hardware Mosquito. Self- synchronizing stream encryption can be performed by using a block cipher in CFB mode

Bernstein, Daniel

345

Metamers of the ventral stream  

PubMed Central

The human capacity to recognize complex visual patterns emerges in a sequence of brain areas known as the ventral stream, beginning with primary visual cortex (V1). We develop a population model for mid-ventral processing, in which non-linear combinations of V1 responses are averaged within receptive fields that grow with eccentricity. To test the model, we generate novel forms of visual metamers stimuli that differ physically, but look the same. We develop a behavioral protocol that uses metameric stimuli to estimate the receptive field sizes in which the model features are represented. Because receptive field sizes change along the ventral stream, the behavioral results can identify the visual area corresponding to the representation. Measurements in human observers implicate V2, providing a new functional account of this area. The model explains deficits of peripheral vision known as crowding, and provides a quantitative framework for assessing the capabilities of everyday vision. PMID:21841776

Freeman, Jeremy; Simoncelli, Eero P.

2011-01-01

346

Metamers of the ventral stream.  

PubMed

The human capacity to recognize complex visual patterns emerges in a sequence of brain areas known as the ventral stream, beginning with primary visual cortex (V1). We developed a population model for mid-ventral processing, in which nonlinear combinations of V1 responses are averaged in receptive fields that grow with eccentricity. To test the model, we generated novel forms of visual metamers, stimuli that differ physically but look the same. We developed a behavioral protocol that uses metameric stimuli to estimate the receptive field sizes in which the model features are represented. Because receptive field sizes change along the ventral stream, our behavioral results can identify the visual area corresponding to the representation. Measurements in human observers implicate visual area V2, providing a new functional account of neurons in this area. The model also explains deficits of peripheral vision known as crowding, and provides a quantitative framework for assessing the capabilities and limitations of everyday vision. PMID:21841776

Freeman, Jeremy; Simoncelli, Eero P

2011-09-01

347

Data Streaming with Affinity Propagation  

Microsoft Academic Search

This paper proposed StrAP (Streaming AP), extending Affinity Propagation (AP) to data steaming. AP, a new clustering algorithm, extracts the data items,\\u000a or exemplars, that best represent the dataset using a message passing method. Several steps are made to build StrAP. The first one (Weighted AP) extends AP to weighted items with no loss of generality. The second one (Hierarchical

Xiangliang Zhang; Cyril Furtlehner; Michle Sebag

2008-01-01

348

Fitting orbits to tidal streams  

E-print Network

Recent years have seen the discovery of many tidal streams through the Galaxy. Relatively straightforward observations of a stream allow one to deduce three phase-space coordinates of an orbit. An algorithm is presented that reconstructs the missing phase-space coordinates from these data. The reconstruction starts from assumed values of the Galactic potential and a distance to one point on the orbit, but with noise-free data the condition that energy be conserved on the orbit enables one to reject incorrect assumptions. The performance of the algorithm is investigated when errors are added to the input data that are comparable to those in published data for the streams of Pal 5. It is found that the algorithm returns distances and proper motions that are accurate to of order one percent, and enables one to reject quite reasonable but incorrect trial potentials. In practical applications it will be important to minimize errors in the input data, and there is considerable scope for doing this.

James Binney

2008-02-11

349

Interplanetary stream magnetism - Kinematic effects  

NASA Technical Reports Server (NTRS)

The particle density and the magnetic-field intensity and direction are calculated for volume elements of the solar wind as a function of the initial magnetic-field direction and the initial speed gradient. It is assumed that the velocity is constant and radial. These assumptions are approximately valid between about 0.1 and 1.0 AU for many streams. Time profiles of the particle density, field intensity, and velocity are calculated for corotating streams, neglecting effects of pressure gradients. The compression and rarefaction of the magnetic field depend sensitively on the initial field direction. By averaging over a typical stream, it is found that the average radial field intensity is inversely proportional to the square of the heliocentric distance, whereas the average intensity in the direction of the planets' motion does not vary in a simple way, consistent with deep space observations. Changes of field direction may be very large, depending on the initial angle; but when the initial angle at 0.1 AU is such that the base of the field line corotates with the sun, the spiral angle is the preferred direction at 1 AU. The theory is also applicable to nonstationary flows.

Burlaga, L. F.; Barouch, E.

1976-01-01

350

Living in Europe  

NSDL National Science Digital Library

Weblogs on just about every topic imaginable (including a few which no one would have imagined) are now available. And, after some time spent living in the shadows of traditional formats such as television and mainstream periodicals, they have garnered the attention of major media programs. One of the more interesting weblog sites out there is Living in Europe, which consists of a cooperative of bloggers and writers who contribute essays, photographs, personal diaries, and news items from Europe. The perspectives section of the site offers some commentaries on the expansion of the European Union and a diary of a foreigner living in Turkey. The photos section features contributions from various parts of Europe, including some musings and photos from Catalonia and Bristol. Visitors who develop a penchant for the site may sign up to help with the administration of the site, or just offer their own commentaries on life in Europe.

351

Psychoanalysis and creative living.  

PubMed

Psychoanalysis is ambivalent about creativity and its own creative potential. On the one hand, psychoanalysis offers enormous resources for elucidating obstacles to creativity, that way of living, making and relating to self and others that is fresh, vital, unpredictable and open to feedback and evolution. On the other hand, when we analysts know too much beforehand about what a work of art really means or the fundamental and singular motives of creativity, then psychoanalysis unconsciously partakes of a perverse scenario in which the work of art serves as merely a means to the author's ends and is psychologically colonized. When psychoanalysis is The Discipline That Knows, then art has nothing new to teach psychoanalysts and our field is impoverished. "Psychoanalysis and Creative Living" attempts to elucidate how psychoanalysis could work through this tension between its creative and perverse possibilities and foster creative living. PMID:12866697

Rubin, Jeffrey B

2003-01-01

352

FROM MATHEMATICS FOR LIVING TO LIVING FOR MATHEMATICS  

E-print Network

FROM MATHEMATICS FOR LIVING TO LIVING FOR MATHEMATICS George Malaty, University of Joensuu, Finland "Life is good for only two things, discovering mathematics and teaching mathematics". Siméon Poisson (1781-1840) Mathematics for living and living for mathematics are related to the goals of mathematics

Spagnolo, Filippo

353

Calit2: Live Webcasts  

NSDL National Science Digital Library

The California Institute for Telecommunications and Information Technology (Calit2) conducts research on the scientific and technological components needed to "extend the reach of the Internet throughout the physical world." (See also report on Mathematics, Engineering and Technology, March 15, 2002) This section of the Institute website features live webcasts and video footage of guest speakers who visited the Institute. Topics range from robot design to Internet plagues, and from Telematics to the Internet marketplace. Upcoming live webcasts for May 2005 will address Non-Magnetic Data Storage Principles, Potential and Problems; Quantum Codes: Constructions and Parameters; and Biotechnology Entrepreneurship.

354

Assessing stream temperature response to environmental change  

NASA Astrophysics Data System (ADS)

Stream temperature controls aquatic ecosystem function by directly influencing water quality, ecosystem productivity, and the physiological functioning of aquatic organisms. To date, there are limited studies of the impacts of environmental disturbance on stream temperature, particularly on the eastern slopes of the Rocky Mountains. This region provides key habitat for native salmonid species such as westslope cutthroat trout (Oncorhynchus clarkii lewisi) and bull trout (Salvelinus confluentus), which are listed as threatened and species of special concern, respectively. Increases in stream temperature could limit habitat availability, reduce competitive advantage, and potentially increase mortality rates for these native species. This study uses field data collected at high spatiotemporal resolution to develop a spatial stream temperature model that simulates the mass and energy balance of the stream system. Preliminary field results demonstrate the high spatial and temporal variability in processes governing stream temperature in three study stream reaches. Groundwater/surface water interactions, topographic setting, and local meteorological conditions all contribute in determining stream thermal regimes. This work discusses how these primary drivers of stream temperature can be incorporated into a physically based spatial model, and demonstrates how depending on the scale of interest, the temperature of a stream can be governed by very different contributing factors.

MacDonald, R. J.; Boon, S.; Byrne, J. M.

2010-12-01

355

Living the Dream.  

ERIC Educational Resources Information Center

Describes one elementary school's "Living the Dream" award program named in honor of Dr. Martin Luther King, Jr. Students read and reviewed books and presented the award to the author of a recent picture book that focused on multicultural awareness. A list of suggested titles is included. (SM)

Rogers, Cynthia; Lemay, Carol

1991-01-01

356

You Live, You Learn  

ERIC Educational Resources Information Center

The Learning Lives project, a four-year study into the learning biographies and trajectories of adults, was conducted by a team of researchers from the universities of Stirling, Exeter, Brighton and Leeds as part of the Teaching and Learning Research Programme (TLRP) of the Economic and Social Research Council, and has just been completed. Whereas

Biesta, Gert

2008-01-01

357

Living with Parkinson's  

MedlinePLUS

Living with Parkinsons Parkinsons is a part of my life, but it is not life itself. --David, 56, three years after diagnosis While your journey with Parkinsons is different from anyone else's, from age of ...

358

Live Science: Robots  

NSDL National Science Digital Library

This website from Live Science looks at developments in robotics. The site includes interactive features, images, multimedia and news items. Teachers interested in beginning a unit on robotics will find many useful resources on the site to use as a starting point.

2010-06-07

359

Sustaining living rivers  

Microsoft Academic Search

Rivers cannot continue to meet society's needs, or the needs of living things, if humans continue to regard river management as a purely political or engineering challenge. The flow of rivers is part of a greater flow, the planet's water cycle, which sustains not only the flow of water but the entire web of life. Ultimately, the condition, or health,

James R. Karr; Ellen W. Chu

2000-01-01

360

Active Living by Design  

NSDL National Science Digital Library

Members of the public health community and those from the world of urban planning have teamed up to create the Active Living By Design program, and by extension, this fine website. With funding from the Robert Wood Johnson Foundation and an academic home at the University of North Carolina at Chapel Hill School of Public Health, the program was created âto increase physical activity through community design, public policies and communications strategies.â On the siteâs homepage, visitors can browse through sections that include information on âActive Living Essentialsâ, âActive Living Programsâ, and âActive Living Resourcesâ. The âEssentialsâ section is a good place to start as visitors can learn about the organizationâs major fields, which include information on the links between physical activity, urban design, and health. Visitors who are looking to learn about the specific âon the groundâ programs will want to look over the âCommunity Partnershipsâ area, as it contains information on initiatives in Chicago, Nashville, Orlando, and Cleveland.

361

Lives Together, Worlds Apart?  

Microsoft Academic Search

The lives of multicultural Muslim couples is the focus of this paper. It is based on interviews with couples in which the husband is a Muslim of Middle Eastern descent with a wife of European-American or Asian-American descent. These women converted to Islam before or after marriage, or have remained Christian. The opportunities, strengths and challenges in such relationships are

Manijeh Daneshpour

2003-01-01

362

Families living with HIV  

Microsoft Academic Search

Given the historical emergence of the AIDS epidemic first among gay men in the developed world, HIV interventions have primarily focused on individuals rather than families. Typically not part of traditional family structures, HIV-positive gay men in Europe and the US lived primarily in societies providing essential infrastructure for survival needs that highly value individual justice and freedom. Interventions were

M. J. Rotheram-Borus; D. Flannery; E. Rice; P. Lester

2005-01-01

363

Living with Cystic Fibrosis  

MedlinePLUS

... disease should still have protected sex to avoid sexually transmitted diseases. Emotional Issues Living with CF may cause fear, ... Closer to Widely Available Cure for Sickle Cell Disease Read all Director's ... NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and ...

364

Living Through A Drought  

NSDL National Science Digital Library

In this lesson, students will practice map-reading skills by using a drought map of Afghanistan from the 'Afghanistan: Land in Crisis' site. Students will learn how to recognize drought, where drought can occur, and how drought affects the people who live in those places.

365

Moab's Living Room  

ERIC Educational Resources Information Center

This article describes the Grand County Public Library (GCPL) which was awarded the 2007 Best Small Library in America, an award sponsored by "Library Journal" and the Bill & Melinda Gates Foundation. Some 4800 of Grand County, Utah's 8,826 people live in Moab and the rest in the adjacent Spanish Valley and environs. The locals are a sizable group

Berry, John N., III

2007-01-01

366

Living Systems Energy Module  

SciTech Connect

The Living Systems Energy Module, renamed Voyage from the Sun, is a twenty-lesson curriculum designed to introduce students to the major ways in which energy is important in living systems. Voyage from the Sun tells the story of energy, describing its solar origins, how it is incorporated into living terrestrial systems through photosynthesis, how it flows from plants to herbivorous animals, and from herbivores to carnivores. A significant part of the unit is devoted to examining how humans use energy, and how human impact on natural habitats affects ecosystems. As students proceed through the unit, they read chapters of Voyage from the Sun, a comic book that describes the flow of energy in story form (Appendix A). During the course of the unit, an ``Energy Pyramid`` is erected in the classroom. This three-dimensional structure serves as a classroom exhibit, reminding students daily of the importance of energy and of the fragile nature of our living planet. Interactive activities teach students about adaptations that allow plants and animals to acquire, to use and to conserve energy. A complete list of curricular materials and copies of all activity sheets appear in Appendix B.

NONE

1995-09-26

367

The Living Periodic Table  

ERIC Educational Resources Information Center

To help make the abstract world of chemistry more concrete eighth-grade students, the author has them create a living periodic table that can be displayed in the classroom or hallway. This display includes information about the elements arranged in the traditional periodic table format, but also includes visual real-world representations of the

Nahlik, Mary Schrodt

2005-01-01

368

CLASSIFYING THE FOOD WASTE STREAM  

E-print Network

LONG-TERM marketing strategy for existing and new products processed from organic waste materials was the goal of a Washington State program begun in 1990. Because food A waste comprises a significant portion of the waste stream, alternatives to landfilling need to be identified. A study by Northwest Economic Associates determined that approximately 1.4 million tons of food waste are generated each year in Washington; more than two-thirds come from the states food processing industry. Other major generators include food service

unknown authors

369

Low stream density watersheds produce flashier floods than high stream density watersheds in ephemeral streams across the southwestern United States  

NASA Astrophysics Data System (ADS)

Eighty percent of watersheds in the southwestern U.S. are ephemeral. Although flow in these watersheds only occurs immediately following rainstorms, these are dynamic systems that can be serious flood hazards. Watershed-stream density was calculated by dividing watershed area by total stream length. Flood recurrence intervals were calculated for peak and total flood volume, both seasonally and annually using 15-minute hydrograph data for 24 ephemeral watersheds in Nevada, Arizona, and New Mexico, where rainfall patterns are heavily influenced by seasonal climate. Stream density and flow statistics were compared seasonally for all watersheds. Ephemeral streams with low density (>0.7) produced larger flood peaks and volumes than their high density counterparts. Further, low stream density watershed flows mirror storm events, while high stream density watersheds mute high intensity rainfall. The opposite effect is observed in perennial watersheds, where higher density streams produce relatively the largest flood peak and volumes. This is likely because ephemeral streams can lose up to 40% of the in-channel flow to infiltration and evaporation. As the flood runoff travel length grows, the greater attenuation and infiltration results in muted flood peaks and lower flood volumes. In the study ephemeral watersheds, the low density streams are more likely to produce serious and damaging flood peaks and volumes in all seasons but especially during the summer monsoon.

Fraser, N.; Schumer, R.

2012-12-01

370

Transitive closure on the imagine stream processor  

SciTech Connect

The increasing gap between processor and memory speeds is a well-known problem in modern computer architecture. The Imagine system is designed to address the processor-memory gap through streaming technology. Stream processors are best-suited for computationally intensive applications characterized by high data parallelism and producer-consumer locality with minimal data dependencies. This work examines an efficient streaming implementation of the computationally intensive Transitive Closure (TC) algorithm on the Imagine platform. We develop a tiled TC algorithm specifically for the Imagine environment, which efficiently reuses streams to minimize expensive off-chip data transfers. The implementation requires complex stream programming since the memory hierarchy and cluster organization of the underlying architecture are exposed to the Imagine programmer. Results demonstrate that limited performance of TC is achieved primarily due to the complicated data-dependencies of the blocked algorithm. This work is an ongoing effort to identify classes of scientific problems well-suited for streaming processors.

Griem, Gorden; Oliker, Leonid

2003-11-11

371

Sentiment Knowledge Discovery in Twitter Streaming Data  

NASA Astrophysics Data System (ADS)

Micro-blogs are a challenging new source of information for data mining techniques. Twitter is a micro-blogging service built to discover what is happening at any moment in time, anywhere in the world. Twitter messages are short, and generated constantly, and well suited for knowledge discovery using data stream mining. We briefly discuss the challenges that Twitter data streams pose, focusing on classification problems, and then consider these streams for opinion mining and sentiment analysis. To deal with streaming unbalanced classes, we propose a sliding window Kappa statistic for evaluation in time-changing data streams. Using this statistic we perform a study on Twitter data using learning algorithms for data streams.

Bifet, Albert; Frank, Eibe

372

Precession of the Sagittarius stream  

NASA Astrophysics Data System (ADS)

Using a variety of stellar tracers - blue horizontal branch stars, main-sequence turn-off stars and red giants - we follow the path of the Sagittarius (Sgr) stream across the sky in Sloan Digital Sky Survey data. Our study presents new Sgr debris detections, accurate distances and line-of-sight velocities that together help to shed new light on the puzzle of the Sgr tails. For both the leading and the trailing tails, we trace the points of their maximal extent, or apocentric distances, and find that they lie at RL = 47.8 0.5 kpc and RT = 102.5 2.5 kpc, respectively. The angular difference between the apocentres is 93.2 3.5, which is smaller than predicted for logarithmic haloes. Such differential orbital precession can be made consistent with models of the Milky Way in which the dark matter density falls more quickly with radius. However, currently, no existing Sgr disruption simulation can explain the entirety of the observational data. Based on its position and radial velocity, we show that the unusually large globular cluster NGC 2419 can be associated with the Sgr trailing stream. We measure the precession of the orbital plane of the Sgr debris in the Milky Way potential and show that, surprisingly, Sgr debris in the primary (brighter) tails evolves differently from the secondary (fainter) tails, both in the north and the south.

Belokurov, V.; Koposov, S. E.; Evans, N. W.; Pearrubia, J.; Irwin, M. J.; Smith, M. C.; Lewis, G. F.; Gieles, M.; Wilkinson, M. I.; Gilmore, G.; Olszewski, E. W.; Niederste-Ostholt, M.

2014-01-01

373

A Web-based Management System for H.264 Live Video Broadcasting  

Microsoft Academic Search

This paper presents a Web-based management system for H.264 live video broadcasting. The system consists of three functional parts, namely, the H.264 streaming control, the program management and the media management. It is created to remotely control and operate a P2P live video broadcasting overlay network using H.264 as the video compression codec. An extended MVC model with a newly

Yin Zhou; Xiaoyu Hua; Hui Xiao

2007-01-01

374

Stream Corridor Restoration: Principles, Processes, and Practices  

NSDL National Science Digital Library

The Natural Resources Conservation Service (NRCS) and fifteen federal agencies have collaborated to create this "common reference for people who are involved in planning, designing, and implementing stream corridor restorations." Preceding the release of the printed version (October 1998), this online version includes full text, color graphics, a slide show on stream corridors, three case studies from streams in New Mexico and Washington, and a collection of useful links to related sites in education, research techniques, and river management.

375

Stabilization of tokamak plasma by lithium streams  

Microsoft Academic Search

The theory of stabilizing free-boundary magnetohydrodynamic instabilities in tokamaks by liquid lithium streams driven by magnetic propulsion is formulated. It is shown that even for uniform current distribution lithium streams open stability windows. Also, it was found that while the conventional, wall-locked, resistive wall mode can be well suppressed by the flow, a new, stream-locked mode determines the limits of

Leonid E. Zakharov

2002-01-01

376

Restoration of Streams in the Agricultural Landscape  

Microsoft Academic Search

\\u000a The advent of easily-accessible tile-drainage and the intensification of agricultural practices have brought widespread decoupling\\u000a of streams and their riparian floodplains in agricultural streams over the last 150 years. Channelised and deeply incised\\u000a in the landscape, these streams are more than often reduced to simple drainage ditches when not simply running in underground\\u000a pipes. This paper describes a modular

Lena B.-M. Vought; Jean O. Lacoursire

377

The Gulf Stream and Density of Fluids  

NSDL National Science Digital Library

A few kilometers from the shores of Palm Beach County, Florida, the Gulf Stream current--a remarkable "river" within an ocean--makes its closest approach to land. To help Integrated Science students understand why and how the Gulf Stream flows, they study how Florida's Gulf Stream current could be responsible for the wreck of the Titanic using the 5E constructivist instructional model--Engage, Explore, Explain, Elaborate, and Evaluate--to analyze a single problem: Why wasn't the iceberg that sank the Titanic either dissolved or deflected eastward by the Gulf Stream before the collision?

Landstrom, Erich

2006-09-01

378

Factors Controlling Hydrologic Permanence of Headwater Streams  

NASA Astrophysics Data System (ADS)

Headwater streams compose the majority of stream miles within most drainages. Interest in monitoring headwater streams is increasing because these streams are vital linkages between upland land use and downstream water bodies. However, traditional stream assessment tools are often unsuitable because many headwater streams are prone to natural drying. Our objective was to identify physical characteristics of headwater reaches that are indicative of hydrologic permanence, a critical first step in applying a stream assessment. We surveyed 61 reaches along 17 headwater streams (< 2.6 km2) across 4 forests in Indiana, Kentucky and Ohio. Reaches varied in hydrologic permanence over the 2-year study. Exploratory data analysis (CART and discriminant analysis) was used to identify physical parameters for classifying reaches by hydrologic permanence. Drainage area was a consistent parameter discriminating permanence categories and consistently separated ephemeral from perennial and intermittent reaches. Secondary parameters that distinguished intermittent from ephemeral and perennial reaches included bankfull width, maximum pool depth, and channel entrenchment. These factors represent basin and reach scales, suggesting that hydrologic permanence in stream networks should be investigated in a hierarchical context. Although this work was reviewed by EPA and approved for publication, it may not necessarily reflect official Agency policy.

Fritz, K. M.; Johnson, B. R.; Walters, D. M.

2005-05-01

379

The Living Lakes  

NSDL National Science Digital Library

Living Lakes Partnership, a nonprofit organization has a goal to "create and support a network within which local lake organizations can find critical kinds of assistance for promoting sustainable development in lake areas." Their award winning site highlights nearly twenty lakes around the world, describing their individual, watershed, and biological characteristics as well as the geologic and human history of the area. The Living With Lakes section discusses lake management and conservation issues dealing with agriculture and urban areas (such as pollution and habitat loss). Other links include a photo gallery, news and events section, discussion groups, and much more. Visitors will enjoy the rich content and visuals that make up this site and will find themselves exploring it for some time and learning along the way.

2002-01-01

380

The Living Edens  

NSDL National Science Digital Library

This web site is the homepage of the Public Broadcasting System's (PBS) The Living Edens. This natural history series introduces viewers to isolated, undisturbed corners of the world. The Living Edens companion Web sites hold many resources for teachers. Each program has a listing of resources that enhance the content that was provided in the program. Classroom activities and guides are provided for each area. Teachers from around the country collaborated to create fun and interesting guides for all teachers. Regions covered include: Anamalai in India, Bhutan, Borneo, Canyonlands in Utah, Costa Rica, Denali in Alaska, Etosha Pan in Namibia, Glacier Bay in Alaska, Kakadu in Northern Territory, Australia, Kamchatka in northeastern Russia, Madagascar, Manu in Peru, Namib in southwestern Africa, Ngorongoro in Tanzania, Palau in Micronesia, Patagonia in Argentina, South Georgia Island in the Southern Ocean, Tasmania in Australia, and Yellowstone National Park in Wyoming, Idaho, and Montana.

381

BBC4: Great Lives  

NSDL National Science Digital Library

William Hogarth, Henry VII, and Richard Pryor all make appearances in the thoughtful BBC4 radio program, Great Lives. Hosted by Matthew Parris, the program was started in 2007, and it continues to grow in popularity. The format is fairly straight-forward: Guests on the program choose someone who has inspired their lives and a conversation ensues. Visitors to the site can sign up for the podcasts from the series, or they can just browse through past programs by year. Currently, there are almost 70 programs on the site, and some of the highlights include journalist Misha Glenny remembering the life of anti-Mafia campaigner Giovanni Falcone and musician Andy Sheppard talking about John Coltrane.

382

SUSTAINABLE LIVE ELECTROACOUSTIC MUSIC  

Microsoft Academic Search

ABSTRACT Real?time\\/performed electro?acoustic music (also known as live electro?acoustic music) is currently facing a se- rious sustainability problem: while its production is in- deed considered very recent from the music history point of view, several technological generations and revolutions have gone by in the meantime. Thus, most of these works can hardly be performed,because the technologies used have gone lost

Nicola Bernardini; Alvise Vidolin

383

Bioluminescence: Living Light  

NSDL National Science Digital Library

This National Geographic lesson plan explores bioluminescent creatures and the underwater world in which they live. Using shoeboxes and black paint, students are directed to build a deep-sea model and inhabit it with fish made out of black construction paper. Students then use the model to describe how organisms use bioluminescence and learn about its use as camouflage. In addition to a detailed protocol, the lesson plan includes suggestions for assessments and links to additional information.

Xpeditions, National G.

384

Traditional Ideologies, Nontraditional Lives  

Microsoft Academic Search

This study examined how blue-collar couples whoalternate work shifts and share the care of theirchildren reconcile their traditional gender ideologieswith their nontraditional lives. In-depth interviews were conducted with twenty-three alternatingshift couples in which the husband was a blue-collarworker. Ninety-six per cent of the participants wereWhite, and the remainder were Hispanic. The results suggested that despite their nontraditionalbehavior, these couples maintained

Francine M. Deutsch; Susan E. Saxon

1998-01-01

385

Families and Assisted Living*  

PubMed Central

Purpose Despite growing research on assisted living (AL) as a residential care option for older adults, the social ramifications of residents' transitions to assisted living is relatively unexplored. This article examines family involvement in AL, including family structures of residents, types of involvement from family members living outside the AL, and outcomes for these family members. Design and Methods We reviewed current literature utilizing the MEDLINE, PSYCINFO, and CINAHL databases to identify AL studies that examined issues pertaining to families or informal care. Following the screening of abstracts, 180 reports were retrieved for further review, and 62 studies were selected for inclusion. Results Families visit residents frequently and provide a wide range of instrumental assistance but provide only minimal personal care. Studies of family outcomes indicated relatively high satisfaction, but potential care burden as well. Implications How family care and involvement occurs in AL in relation to formal care provision and whether various types of formal-informal care integration influence family outcomes remains unclear. We suggest a research agenda that attempts to tease out causal relationships for family involvement, differentiate family roles, and implement longitudinal analyses for a range of family outcomes. PMID:18162571

Gaugler, Joseph E.; Kane, Robert L.

2008-01-01

386

Drawdown and stream depletion produced by pumping in the vicinity of a partially penetrating stream  

USGS Publications Warehouse

Commonly used analytical approaches for estimation of pumping-induced drawdown and stream depletion are based on a series of idealistic assumptions about the stream-aquifer system. A new solution has been developed for estimation of drawdown and stream depletion under conditions that are more representative of those in natural systems (finite width stream of shallow penetration adjoining an aquifer of limited lateral extent). This solution shows that the conventional assumption of a fully penetrating stream will lead to a significant overestimation of stream depletion (> 100 %) in many practical applications. The degree of overestimation will depend on the value of the stream leakance parameter and the distance from the pumping well to the stream. Although leakance will increase with stream width, a very wide stream will not necessarily be well represented by a model of a fully penetrating stream. The impact of lateral boundaries depends upon the distance from the pumping well to the stream and the stream leakance parameter. In most cases, aquifer width must be on the order of hundreds of stream widths before the assumption of a laterally infinite aquifer is appropriate for stream-depletion calculations. An important assumption underlying this solution is that stream-channel penetration is negligible relative to aquifer thickness. However, an approximate extension to the case of nonnegligible penetration provides reasonable results for the range of relative penetrations found in most natural systems (up to 85%). Since this solution allows consideration of a much wider range of conditions than existing analytical approaches, it could prove to be a valuable new tool for water management design and water rights adjudication purposes.

Butler, J.J., Jr.; Zlotnik, V.A.; Tsou, M.-S.

2001-01-01

387

Modeling ice streams: Derived quantities  

NASA Technical Reports Server (NTRS)

The model addressed is a finite-element, map-plane, time-dependent, column-averaged continuity equation solver. The key to the fitting process involves the balance between ice motion dominated by flow in internal layers, and ice motion dominated by sliding at the bed. The fitting process involves an iterative process carried out in the time domain. Beginning with the portion of the ice sheet being modeled identical to the present ice sheet with uniform flow, sliding, and fraction specified at nominal values, the model monitors each nodal point surface elevation. As the calculated surface elevation deviates from the present surface, a correction proportional to the difference is applied to selected parameter sets. This correction is in a sense that would tend to improve the fit at the particular nodal point. A calculated surface elevation that was higher than the present surface would result in an increased fraction, which would tend to lower the calculated surface (if the flow or sliding constant were being used as the fitting parameter, they would be lowered to improve the fit). This process is allowed to proceed as long as is necessary for the situation to stabilize. Typically, this takes tens of thousands of model years, but the rate is dependent on other external forcings such as the accumulation rate. The primary result is that while a typical sample of ice streams from around Antarctica can be fitted quite reasonably using only the fraction of the velocity due to sliding, a different mechanism seems to be in play along the Siple Coast, where reduced sliding constants are required to attain a reasonable fit. Flow is more strongly channelized in this region, and velocities are, in general, higher than are observed in other regions. It is unlikely that the mechanism that controls the ice movement along the Siple Coast is exactly similar to the mechanisms in the other ice streams. The concept of deformable sediments and their contribution to the fast flow along the Siple Coast may have limited applicability to other Antarctic ice streams.

Fastook, James

1993-01-01

388

Effects of stream restoration and wastewater treatment plant effluent on fish communities in urban streams  

Microsoft Academic Search

SUMMARY 1. Fish community characteristics, resource availability and resource use were assessed in three headwater urban streams in Piedmont North Carolina, U.S.A. Three site types were examined on each stream; two urban (restored and unrestored) and a forested site downstream of urbanisation, which was impacted by effluent from a wastewater treatment plant (WWTP). Stream basal resources, aquatic macroinvertebrates, terrestrial macroin-

ROBERT M. NORTHINGTON; ANNE E. HERSHEY

2006-01-01

389

Influence of Stream Discharge on Reproductive Success of a Prairie Stream Fish Assemblage  

Microsoft Academic Search

We studied the relationship between stream discharge and reproductive success for five members of a prairie stream fish assemblage. Based on information obtained from the literature, we constructed seven models relating stream discharge to successful reproduction. To assess the utility of our models, we collected larval and juvenile Arkansas River shiners Notropis girardi, peppered chub Macrhybopsis tetranema, plains minnow Hybognathus

Bart W. Durham; Gene R. Wilde

2006-01-01

390

Stream pH as an Abiotic Gradient Influencing Distributions of Trout in Pennsylvania Streams  

Microsoft Academic Search

Elevation and stream slope are abiotic gradients that limit upstream distributions of brook trout Salvelinus fontinalis and brown trout Salmo trutta in streams. We sought to determine whether another abiotic gradient, base-flow pH, may also affect distributions of these two species in eastern North America streams. We used historical data from the Pennsylvania Fish and Boat Commission's fisheries management database

Patrick M. Kocovsky; Robert F. Carline

2005-01-01

391

STREAM CHEMISTRY IN THE EASTERN UNITED STATES: II. CURRENT SOURCES OF ACIDITY AND LOW ANC STREAMS  

EPA Science Inventory

We examined anion composition in National Stream Survey (NSS) data in order to evaluate the most probable sources of current acidity in acidic and low acid neutralizing capacity (ANC) streams in the eastern U.S. cidic streams that had almost no organic influence and sulfate conce...

392

Stormwater and Streams A Collaboration to Protect the Thermal Regime in New England Streams  

E-print Network

Stormwater and Streams A Collaboration to Protect the Thermal Regime in New England Streams Dr) a jointly planned and led meeting with agency partners and stakeholders. In New England, our green economy streams in New England are highly sensitive to changes in temperature and their water temperature dictates

New Hampshire, University of

393

Comparing Stream Geomorphology and Channel Habitat along a Stream Restoration Gradient Sam Stewart  

E-print Network

- geomorphology, stream restoration gradient, large woody debris (LWD), channel habitat Introduction In stream organisms. The restoration technique of woody debris installation has been used to help reclaim these streams and bring diversity back to these habitats. The study of woody debris can be taken a step further

Vallino, Joseph J.

394

Stream Control Transmission Protocol Steganography  

E-print Network

Stream Control Transmission Protocol (SCTP) is a new transport layer protocol that is due to replace TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) protocols in future IP networks. Currently, it is implemented in such operating systems like BSD, Linux, HP-UX or Sun Solaris. It is also supported in Cisco network devices operating system (Cisco IOS) and may be used in Windows. This paper describes potential steganographic methods that may be applied to SCTP and may pose a threat to network security. Proposed methods utilize new, characteristic SCTP features like multi-homing and multistreaming. Identified new threats and suggested countermeasures may be used as a supplement to RFC 5062, which describes security attacks in SCTP protocol and can induce further standard modifications.

Fraczek, Wojciech; Szczypiorski, Krzysztof

2010-01-01

395

Acoustic Streaming in the Cochlea  

NASA Astrophysics Data System (ADS)

A first description of Acoustic Streaming (AS) in air was given by Rayleigh in 1884. Nyborg (1952) describes AS due to attenuated waves and cited some examples, e.g. the presence of small eddies in a protoplasm. In connection with nonlinear cochlear mechanics the effects were not explicitly denoted as AS though the nonlinearity should induce eddies which were demonstrated experimentally at high pressure levels by Bekesy and suggested theoretically by e.g. Tonndorf (1), although Zwicker questioned the existence of AS at normal auditory pressure levels. Later Lighthill (2) gave an analytical approach of AS in the inner ear but a numerical evaluation failed to appear. Because of computer limitations and the lack of appropriate models AS could not be verified for the cochlea up to now. This work is a numerical approach to confirm or refute AS in the cochlea.

Bhnke, F.; Scharff, M.

2009-02-01

396

Coldwater fish in wadeable streams  

USGS Publications Warehouse

Standardizing sampling methods for fish populations across large regions is important for consistent measurement of large-scale effects of climate or geography. In addition, pooling samples creates larger sample sizes and can facilitate data sharing among scientists and land managers. Sampling freshwater fish has largely not been standardized due to the diversity of fish and habitats. USGS aquatic ecologist Jason Dunham and co-authors contributed a chapter about sampling coldwater fish in wadeable streams to a new book that details common methods, protocols, and guidelines for sampling fish across North America. Topics include three common sampling methods: electrofishing, snorkeling, and nest counts. Each method provides complementary information about different species and life stages. The information will be useful for initiating new or fine-tuning ongoing sampling programs.

Dunham, Jason B.; Rosenberger, Amanda E.; Thurow, Russell F.; Dolloff, C. Andrew; Howell, Philip J.

2009-01-01

397

Amalfi/Positano HistoricReflections_10_Day_LIVE_2012.eps  

E-print Network

Kusadasi Marseille Pisa Florence Rome Amalfi/Positano HistoricReflections_10_Day_LIVE_2012.eps Taormina Athens Santorini Barcelona This map represents approximate locations. HISTORIC REFLECTIONS remnants of past eruptions can be seen in cones, craters and lava streams. Discover a Norman Castl

Virginia Tech

398

Seeing is Not Believing: Visual Verifications through Liveness Analysis using Mobile Devices  

E-print Network

can be trusted and has not been tampered with by a malicious user attempting to game the system. We in order to verify the "liveness" of the video streams. We introduce Movee, a system that exploits the in expect to be able to deposit checks using mobile devices, and broadcasting videos from camera phones

Carbunar, Bogdan

399

Effects of urbanization and urban stream restoration on the physical and biological structure of stream ecosystems.  

PubMed

Streams, as low-lying points in the landscape, are strongly influenced by the stormwaters, pollutants, and warming that characterize catchment urbanization. River restoration projects are an increasingly popular method for mitigating urban insults. Despite the growing frequency and high expense of urban stream restoration projects, very few projects have been evaluated to determine whether they can successfully enhance habitat structure or support the stream biota characteristic of reference sites. We compared the physical and biological structure of four urban degraded, four urban restored, and four forested streams in the Piedmont region of North Carolina to quantify the ability of reach-scale stream restoration to restore physical and biological structure to urban streams and to examine the assumption that providing habitat is sufficient for biological recovery. To be successful at mitigating urban impacts, the habitat structure and biological communities found in restored streams should be more similar to forested reference sites than to their urban degraded counterparts. For every measured reach- and patch-scale attribute, we found that restored streams were indistinguishable from their degraded urban stream counterparts. Forested streams were shallower, had greater habitat complexity and median sediment size, and contained less-tolerant communities with higher sensitive taxa richness than streams in either urban category. Because heavy machinery is used to regrade and reconfigure restored channels, restored streams had less canopy cover than either forested or urban streams. Channel habitat complexity and watershed impervious surface cover (ISC) were the best predictors of sensitive taxa richness and biotic index at the reach and catchment scale, respectively. Macroinvertebrate communities in restored channels were compositionally similar to the communities in urban degraded channels, and both were dissimilar to communities in forested streams. The macroinvertebrate communities of both restored and urban degraded streams were correlated with environmental variables characteristic of degraded urban systems. Our study suggests that reach-scale restoration is not successfully mitigating for the factors causing physical and biological degradation. PMID:21939035

Violin, Christy R; Cada, Peter; Sudduth, Elizabeth B; Hassett, Brooke A; Penrose, David L; Bernhardt, Emily S

2011-09-01

400

Choosing a Senior Living Community  

MedlinePLUS

... quality residence and the important factors in the decision-making process. Choosing a senior living residence for yourself ... a senior living care setting. This type of decision-making allows for some research and time to explore ...

401

People with Disabilities: Living Healthy  

MedlinePLUS

... this? Submit Button CDC Features People with Disabilities: Living Healthy Share Compartir If you are living with ... Internet. Tips for Leading a Long and Healthy Life Children and adults with disabilities are less likely ...

402

Living with Peripheral Arterial Disease  

MedlinePLUS

... Share this page from the NHLBI on Twitter. Living With Peripheral Arterial Disease If you have peripheral ... and lower your risk for these other conditions. Living With Peripheral Arterial Disease Symptoms If you have ...

403

Assisted Living Services and Amenities  

MedlinePLUS

... operated by nonprofit or for-profit organizations. Personal Space Senior living communities offer a variety of design ... assistance now or may in the future. Community Space Common areas in senior living residences typically include ...

404

Living with Spinal Cord Injury  

MedlinePLUS

... lead happy and productive lives. What can an occupational therapist do? ? Evaluate a persons ability and level ... Skills for the Job of Living The American Occupational Therapy Association, Inc. www.aota.org Revised 11/ ...

405

Optimal video stream multiplexing through linear programming  

Microsoft Academic Search

This paper presents a new optimal multiplexing scheme for compressed video streams based on their individual e-PCRTT transmission schedules. A linear programming algorithm is proffered, which takes into account the different constraints of each client. The algorithm simultaneously finds the optimum total multiplexed and individual stream schedules that minimize the peak transmission rate. Since the problem is formulated as a

Helman I. Stern; Ofer Hadar; Nir Friedman

2008-01-01

406

Optimal Video Stream Multiplexing through Linear Programming  

Microsoft Academic Search

This paper presents a new optimal multiplexing scheme for compressed video streams based on a piecewise linear approximation of the accumulative data curve of each stream. A linear programming algorithm is provided, which takes into account different constraints of each client. It is shown that the algorithm succeeds in obtaining maximum bandwidth utilization with Quality of Service (QoS) guarantees. The

Helman I Stern; Ofer Hadar

2002-01-01

407

Talented Streams Objects composed from Features  

E-print Network

Talented Streams Objects composed from Features Bachelor's thesis at the Software Composition Group is modeled as a talent and can be composed with any other feature. We introduce scoped talents which allow, nor to a significant amount of code duplication. The resulting framework is called Talented Streams

Nierstrasz, Oscar

408

Data stream management and mining Georges HEBRAIL  

E-print Network

Data stream management and mining Georges HEBRAIL TELECOM ParisTech, CNRS LTCI Paris, France Abstract. This paper provides an introduction to the field of data stream management and mining. The increase of data production in operational information systems prevents from monitoring these systems

Paris-Sud XI, Université de

409

Incremental Local Outlier Detection for Data Streams  

Microsoft Academic Search

Outlier detection has recently become an important problem in many industrial and financial applications. This problem is further complicated by the fact that in many cases, outliers have to be detected from data streams that arrive at an enormous pace. In this paper, an incremental LOF (Local Outlier Factor) algorithm, appropriate for detecting outliers in data streams, is proposed. The

Dragoljub Pokrajac; Aleksandar Lazarevic; Longin Jan Latecki

2007-01-01

410

GAPS IN THE GD-1 STAR STREAM  

SciTech Connect

GD-1 is a long, thin, Milky Way star stream that has readily visible density variations along its length. We quantify the locations, sizes, and statistical significance of the density structure, i.e., gaps, using a set of scaled filters. The shapes of the filters are based on the gaps that develop in simulations of dark matter sub-halos crossing a star stream. The high Galactic latitude 8.4 kpc long segment of GD-1 that we examine has 8 {+-} 3 gaps of 99% significance or greater, with the error estimated on the basis of tests of the gap-filtering technique. The cumulative distribution of gaps more than three times the width of the stream is in good agreement with predictions for dark matter sub-halo encounters with cold star streams. The number of gaps narrower than three times the width of the GD-1 stream falls well below the cold stream prediction which is taken into account for the gap creation rate integrated over all sizes. Simple warm stream simulations scaled to GD-1 show that the falloff in gaps is expected for sub-halos below a mass of 10{sup 6} M{sub Sun }. The GD-1 gaps requires 100 sub-halos >10{sup 6} M{sub Sun} within 30 kpc, the apocenter of GD-1 orbit. These results are consistent with LCDM sub-halo predictions but further improvements in stream signal-to-noise and gap modeling will be welcome.

Carlberg, R. G. [Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada); Grillmair, C. J., E-mail: carlberg@astro.utoronto.ca, E-mail: carl@ipac.caltech.edu [Spitzer Science Center, 1200 East California Boulevard, Pasadena, CA 91125 (United States)

2013-05-10

411

The Gulf Stream and Density of Fluids  

ERIC Educational Resources Information Center

A few kilometers from the shores of Palm Beach County, Florida, is the Gulf Stream current--a remarkable "river" within an ocean. The current's journey across the Atlantic Ocean connects southeast Florida and southwest Great Britain as it streams steadily north at speeds of 97 km a day; moving 100 times as much water as all the rivers on Earth.

Landstrom, Erich

2006-01-01

412

Approximate Frequency Counts over Data Streams  

Microsoft Academic Search

We present algorithms for computing frequency counts exceeding a user-specified threshold over data streams. Our algorithms are simple and have provably small memory footprints. Although the output is approximate, the error is guaranteed not to exceed a user-specified parameter. Our algo- rithms can easily be deployed for streams of single- ton items like those found in IP network monitor- ing.

Gurmeet Singh Manku; Rajeev Motwani

2002-01-01

413

EFFECTS OF ACIDIFICATION ON STREAM ECOSYSTEMS  

EPA Science Inventory

The purpose of the paper is to summarize known effects of acid precipitation on stream ecosystems, with emphasis on the Great Lakes region. Unfortunately, very little research has been conducted on streams in much of the Great Lakes region. Thus, data will be utilized from other ...

414

Sentiment Knowledge Discovery in Twitter Streaming Data  

Microsoft Academic Search

Micro-blogs are a challenging new source of information for data mining techniques. Twitter is a micro-blogging service built to dis- cover what is happening at any moment in time, anywhere in the world. Twitter messages are short, and generated constantly, and well suited for knowledge discovery using data stream mining. We briey discuss the challenges that Twitter data streams pose,

Albert Bifet; Eibe Frank

2010-01-01

415

INDICATORS OF HYDROLOGIC PERMANENCE IN HEADWATER STREAMS  

EPA Science Inventory

Headwater intermittent streams lie at the aquatic-terrestrial interface and represent much of our nation's stream miles. Recent court cases concerning the definition of jurisdictional waters under the Clean Water Act have illuminated a need to better understand the characteristi...

416

Assessing stream temperature response to environmental change  

Microsoft Academic Search

Stream temperature controls aquatic ecosystem function by directly influencing water quality, ecosystem productivity, and the physiological functioning of aquatic organisms. To date, there are limited studies of the impacts of environmental disturbance on stream temperature, particularly on the eastern slopes of the Rocky Mountains. This region provides key habitat for native salmonid species such as westslope cutthroat trout (Oncorhynchus clarkii

R. J. MacDonald; S. Boon; J. M. Byrne

2010-01-01

417

Monitoring-based Adaptive Overlay Streaming Media  

Microsoft Academic Search

Streaming media delivery is of great importance for ap- plications such as Video on Demand (VOD) and Internet conferencing. Traditional streaming media systems treat the underlying network as a best-effort black box, and ap- ply various coding techniques or blindly transmit the data over multiple paths to improve the quality and reliabil- ity. In this paper, we design and implement

Brian Chavez; Yan Chen

418

Finding Frequent Items over General Update Streams  

Microsoft Academic Search

We present novel space and time-ecient algorithms for find- ing frequent items over general update streams. Our algorithms are based on a novel adaptation of the popular dyadic intervals method for finding frequent items. The algorithms improve upon existing algorithms in both theory and practice. algorithms that can summarize input data streams while processing them in an online fashion. In

Sumit Ganguly; Abhayendra N. Singh; Satyam Shankar

2008-01-01

419

SWAT: Hierarchical Stream Summarization in Large Networks  

Microsoft Academic Search

The problem of statistics and aggregate maintenance over data streams has gained popularity in recent years es- pecially in telecommunications network monitoring, trend- related analysis, web-click streams, stock tickers, and other time-variant data. The amount of data generated in such applications can become too large to store, or if stored too large to scan multiple times. We consider queries over

Ahmet Bulut; Ambuj K. Singh

2003-01-01

420

Exploiting Punctuation Semantics in Continuous Data Streams  

Microsoft Academic Search

As most current query processing architectures are already pipelined, it seems logical to apply them to data streams. However, two classes of query operators are impractical for processing long or infinite data streams. Unbounded stateful operators maintain state with no upper bound in size and, so, run out of memory. Blocking operators read an entire input before emitting a single

Peter A. Tucker; David Maier; Tim Sheard; Leonidas Fegaras

2003-01-01

421

Efficient join processing on uncertain data streams  

Microsoft Academic Search

Join processing in the streaming environment has many practical applications such as data cleaning and outlier detection. Due to the inherent uncertainty in the real-world data, it has become an increasingly important problem to consider the join processing on uncertain data streams, where the incoming data at each timestamp are uncertain and imprecise. Different from the static databases, processing uncertain

Xiang Lian; Lei Chen

2009-01-01

422

A Scheme of Predictor Based Stream Buffers  

E-print Network

Data Cache Misses In Superscalar � Redesign RF-Cache-DRAM memory hierarchy � Addition of L2 and L3 is a modified standard stream buffer. � A group of predictors with each predictor responsible for prediction � Implementation of PC-coupled predictors and compare with current performance. � Redesign the structure of stream

Rixner, Scott

423

Data stream processing in factory automation  

Microsoft Academic Search

Data stream processing is a valuable technique to solve demanding problems that also occur in factory automation, such as continuous data processing with high throughput and real-time output, and distributed data acquisition and processing. However, the intricacies of data stream processing techniques make its application difficult in real-life scenarios. One particularly challenging situation arises when changing conditions necessitate a modification

Bernhard Wolf; Philipp Herzig; Ingo Behrens; Anirban Majumdar; Michael Ameling

2010-01-01

424

The Pal 5 Star Stream Gaps  

NASA Astrophysics Data System (ADS)

Pal 5 is a low-mass, low-velocity-dispersion, globular cluster with spectacular tidal tails. We use the Sloan Digital Sky Survey Data Release 8 data to extend the density measurements of the trailing star stream to 23 deg distance from the cluster, at which point the stream runs off the edge of the available sky coverage. The size and the number of gaps in the stream are measured using a filter which approximates the structure of the gaps found in stream simulations. We find 5 gaps that are at least 99% confidence detections with about a dozen gaps at 90% confidence. The statistical significance of a gap is estimated using bootstrap resampling of the control regions on either side of the stream. The density minimum closest to the cluster is likely the result of the epicyclic orbits of the tidal outflow and has been discounted. To create the number of 99% confidence gaps per unit length at the mean age of the stream requires a halo population of nearly a thousand dark matter sub-halos with peak circular velocities above 1 km s-1 within 30 kpc of the galactic center. These numbers are a factor of about three below cold stream simulation at this sub-halo mass or velocity but, given the uncertainties in both measurement and more realistic warm stream modeling, are in substantial agreement with the LCDM prediction.

Carlberg, R. G.; Grillmair, C. J.; Hetherington, Nathan

2012-11-01

425

Towards Kernel Density Estimation over Streaming Data  

Microsoft Academic Search

A variety of real-world applications heavily relies on the analysis of transient data streams. Due to the rigid process- ing requirements of data streams, common analysis tech- niques as known from data mining are not applicable. A fundamental building block of many data mining and analysis approaches is density estimation. It provides a well-defined estimation of a continuous data distribution,

Christoph Heinz; Bernhard Seeger

2006-01-01

426

Incomplete Mixing in a Small, Urban stream  

NASA Astrophysics Data System (ADS)

Conservative solute tracer experiments were conducted in Indian Creek, a small urban stream located in Philadelphia, Pennsylvania, USA. Estimated flow rates were between 46 L s-1 and 81 L s-1, average stream width was 5.5 m and average stream depth was 0.2 m. Given these dimensions, most researchers would think it reasonable to assume that the stream is completely mixed vertically and horizontally. However, we found that the stream was not vertically completely mixed in a 0.95 m deep, 30 m long pool. The limited mixing was demonstrated by the vertical stratification of a tracer cloud which was completely mixed both laterally and vertically across the stream prior to entering the pool. We suggest that the cause of limited mixing is due to a balance between groundwater inflow and transverse dispersion at the cross section. We show that the unsupported assumption of complete mix may result in a wide range, and thus increased uncertainty, of the values of stream flow and longitudinal dispersion coefficient estimated from these data. We conclude that the assumption of complete mix and one-dimensional modeling must be checked against actual field conditions, even in small streams.

Ryan, R. J.; Boufadel, M. C.

2006-05-01

427

Stabilization of tokamak plasma by lithium streams  

Microsoft Academic Search

The stabilization theory of free-boundary magnetohydrodynamic instabilities in tokamaks by liquid lithium streams driven by magnetic propulsion is formulated. While the conventional, wall-locked, resistive wall mode can be well suppressed by the flow, a new, stream-locked mode determines the limits of the flow stabilization.

L. E. Zakharov

2000-01-01

428

COMPARTMENTAL MODEL OF NITRATE RETENTION IN STREAMS  

EPA Science Inventory

A compartmental modeling approach is presented to route nitrate retention along a cascade of stream reach sections. A process transfer function is used for transient storage equations with first order reaction terms to represent nitrate uptake in the free stream, and denitrifica...

429

THE PAL 5 STAR STREAM GAPS  

SciTech Connect

Pal 5 is a low-mass, low-velocity-dispersion, globular cluster with spectacular tidal tails. We use the Sloan Digital Sky Survey Data Release 8 data to extend the density measurements of the trailing star stream to 23 deg distance from the cluster, at which point the stream runs off the edge of the available sky coverage. The size and the number of gaps in the stream are measured using a filter which approximates the structure of the gaps found in stream simulations. We find 5 gaps that are at least 99% confidence detections with about a dozen gaps at 90% confidence. The statistical significance of a gap is estimated using bootstrap resampling of the control regions on either side of the stream. The density minimum closest to the cluster is likely the result of the epicyclic orbits of the tidal outflow and has been discounted. To create the number of 99% confidence gaps per unit length at the mean age of the stream requires a halo population of nearly a thousand dark matter sub-halos with peak circular velocities above 1 km s{sup -1} within 30 kpc of the galactic center. These numbers are a factor of about three below cold stream simulation at this sub-halo mass or velocity but, given the uncertainties in both measurement and more realistic warm stream modeling, are in substantial agreement with the LCDM prediction.

Carlberg, R. G.; Hetherington, Nathan [Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada); Grillmair, C. J., E-mail: carlberg@astro.utoronto.ca, E-mail: hetherington@astro.utoronto.ca, E-mail: carl@ipac.caltech.edu [Spitzer Science Center, 1200 E. California Blvd., Pasadena, CA 91125 (United States)

2012-11-20

430

Conundrum of the Large Scale Streaming  

E-print Network

The etiology of the large scale peculiar velocity (large scale streaming motion) of clusters would increasingly seem more tenuous, within the context of the gravitational instability hypothesis. Are there any alternative testable models possibly accounting for such large scale streaming of clusters?

T. M. Malm

1999-09-12

431

Giving Rise to the Jet Stream  

NSDL National Science Digital Library

This 15-panel interactive from NOVA Online describes some of the factors (e.g., Earth's rotation and the sun's uneven heating of Earth's surface) contributing to the formation of the high-speed eastward flows of the jet streams, found near the top of the troposphere. These jet streams play a major role in guiding weather systems.

Nova, Wgbh; Domain, Teachers'

432

NATIONAL STREAM QUALITY ACCOUNTING NETWORK DATA  

EPA Science Inventory

The objectives of the U.S. Geological Surveys National Stream Quality Accounting Network (NASQAN) program are to (1) account for the quantity and quality of water moving within and from the United States, (2) depict area water-quality variability, and (3) detect changes in stream...

433

Bachelor of Computer Science Robotics Stream  

E-print Network

Bachelor of Computer Science Robotics Stream School of Computer Science April 14, 2011 1 Objectives The primary objective of the Robotics stream for the Bachelor of Computer Science Honours degree is recruiting they find interesting. Robotics is a well-established area both in Computer Science and in En- gineering

434

Live from the Arctic  

NASA Astrophysics Data System (ADS)

For reasons of geography and geophysics, the poles of our planet, the Arctic and Antarctica, are places where climate change appears first: they are global canaries in the mine shaft. But while Antarctica (its penguins and ozone hole, for example) has been relatively well-documented in recent books, TV programs and journalism, the far North has received somewhat less attention. This project builds on and advances what has been done to date to share the people, places, and stories of the North with all Americans through multiple media, over several years. In a collaborative project between the Arctic Research Consortium of the United States (ARCUS) and PASSPORT TO KNOWLEDGE, Live from the Arctic will bring the Arctic environment to the public through a series of primetime broadcasts, live and taped programming, interactive virtual field trips, and webcasts. The five-year project will culminate during the 2007-2008 International Polar Year (IPY). Live from the Arctic will: A. Promote global understanding about the value and world -wide significance of the Arctic, B. Bring cutting-edge research to both non-formal and formal education communities, C. Provide opportunities for collaboration between arctic scientists, arctic communities, and the general public. Content will focus on the following four themes. 1. Pan-Arctic Changes and Impacts on Land (i.e. snow cover; permafrost; glaciers; hydrology; species composition, distribution, and abundance; subsistence harvesting) 2. Pan-Arctic Changes and Impacts in the Sea (i.e. salinity, temperature, currents, nutrients, sea ice, marine ecosystems (including people, marine mammals and fisheries) 3. Pan-Arctic Changes and Impacts in the Atmosphere (i.e. precipitation and evaporation; effects on humans and their communities) 4. Global Perspectives (i.e. effects on humans and communities, impacts to rest of the world) In The Earth is Faster Now, a recent collection of comments by members of indigenous arctic peoples, arctic residents speak in eloquent terms of the changes they see around them, manifested in new patterns of vegetation, the melting of permafrost and the absence of game species that used to be abundant. Meanwhile, new satellites and more sophisticated sensors on the ground and in the ice, add scientific testimony that seems to support and even extend native perceptions. Live from the Arctic will unify both perspectives, and use todays most powerful and effective communications media to connect young people and general audiences all across America to researchers and communities living and working in the Arctic. During IPY there will be a level of interest in the Polar regions unprecedented in a generation. Live from the Arctic offers unique resources to satisfy that curiosity, and encourage active participation and engagement in understanding some of Earths most significant peoples, places and rapidly changing conditions.

Haines-Stiles, G.; Warnick, W. K.; Warburton, J.; Sunwood, K.

2003-12-01

435

Performance Analysis of Home Streaming Video Using Orb Rabin Karki, Thangam Seenivasan, Mark Claypool and Robert Kinicki  

E-print Network

radio, broadcast television (if the home PC has TV tuner card) and even live video streaming from copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice

Claypool, Mark

436

Real-Time Content-Based Adaptive Streaming of Sports Videos Shih-Fu Chang, Di Zhong, and Raj Kumar  

E-print Network

. The system includes a content analysis module for detecting important segments in the video, a variable-rate, NY, USA Abstract In this paper, we present a real-time software system for filtering live video content and then adaptively streaming the video over resource limited networks or devices. The rate

Chang, Shih-Fu

437

Physical Stream Habitat Dynamics in Lower Bear Creek, Northern Arkansas  

USGS Publications Warehouse

We evaluated the roles of geomorphic and hydrologic dynamics in determining physical stream habitat in Bear Creek, a stream with a 239 km2 drainage basin in the Ozark Plateaus (Ozarks) in northern Arkansas. During a relatively wet 12-month monitoring period, the geomorphology of Bear Creek was altered by a series of floods, including at least four floods with peak discharges exceeding a 1-year recurrence interval and another flood with an estimated 2- to 4-year recurrence interval. These floods resulted in a net erosion of sediment from the study reach at Crane Bottom at rates far in excess of other sites previously studied in the Ozarks. The riffle-pool framework of the study reach at Crane Bottom was not substantially altered by these floods, but volumes of habitat in riffles and pools changed. The 2- to 4-year flood scoured gravel from pools and deposited it in riffles, increasing the diversity of available stream habitat. In contract, the smaller floods eroded gravel from the riffles and deposited it in pools, possibly flushing fine sediment from the substrate but also decreasing habitat diversity. Channel geometry measured at the beginning of the study was use to develop a two-dimensional, finite-element hydraulic model at assess how habitat varies with hydrologic dynamics. Distributions of depth and velocity simulated over the range of discharges observed during the study (0.1 to 556 cubic meters per second, cms) were classified into habitat units based on limiting depths and Froude number criteria. The results indicate that the areas of habitats are especially sensitive to change to low to medium flows. Races (areas of swift, relatively deep water downstream from riffles) disappear completely at the lowest flows, and riffles (areas of swift, relatively shallow water) contract substantially in area. Pools also contract in area during low flow, but deep scours associated with bedrock outcrops sustain some pool area even at the lowest modeled flows. Modeled boundary shear stresses were used to evaluate which flows are responsible for the most mobilization of the bed, and therefore, habitat maintenance. Evaluation of the magnitude and frequency of bed-sediment entrainment shows that most of the habitat maintenance results from flows that occur on average about 4 to 7 days a year. Our analysis documents the geomorphic and hydrologic dynamics that form and maintain habitats in a warmwater stream in the Ozarks. The range of flows that occurs on this stream can be partitioned into those that sustain habitat by providing the combinations of depth and velocity that stream organisms live with most of the time, and those flows that surpass sediment entrainment thresholds, alter stream geomorphology, and therefore maintain habitat. The quantitative relations show sensitivity of habitats to flow variation, but do not address how flow may vary in the future, or the extent to which stream geomorphology may be affected by variations in sediment supply.

Reuter, Joanna M.; Jacobson, Robert B.; Elliott, Caroline M.

2003-01-01

438

Live Access Server  

NSDL National Science Digital Library

The Live Access Server (LAS) is a highly configurable Web server designed to provide flexible access to geo-referenced scientific data. LAS enables users to view data with on-the-fly graphics, request custom subsets of variables in a variety of file formats, and compare variables from distributed locations. LAS enables the data provider to unify access to multiple types of data in a single interface, create thematic data servers from distributed data sources (through the use of DODS/OPenDAP), offer derived products on the fly, and offer unique products (e.g. visualization styles specialized for the data).

Hankin, Steve

2002-09-09

439

Living in Space  

NASA Technical Reports Server (NTRS)

In this educational video from the 'Liftoff to Learning' series, astronauts from the STS-56 Mission (Ken Cockrell, Mike Foale, Ellen Ochoa, Steve Oswald, and Ken Cameron) explain and show through demonstrations how microgravity affects the way astronauts live onboard the Space Shuttle, and how these same daily habits or processes differ on Earth. A tour of the Space Shuttle is given, including the sleeping compartments, the kitchen area, the storage compartments, and the Waste Collection System (or WCS, as they call it). Daily habits (brushing teeth, shampooing hair and bathing, eating,...) are explained and actively illustrated, along with reasons of how these applications differ from their employment on Earth.

Brown, Ray (editor)

1993-01-01

440

Microencapsulation Of Living Cells  

NASA Technical Reports Server (NTRS)

In experimental technique, living cells and other biological materials encapsulated within submillimeter-diameter liquid-filled spheres. Sphere material biocompatible, tough, and compliant. Semipermeable, permitting relatively small molecules to move into and out of sphere core but preventing passage of large molecules. New technique promises to make such spherical capsules at high rates and in uniform, controllable sizes. Capsules injected into patient through ordinary hypodermic needle. Promising application for technique in treatment of diabetes. Also used to encapsulate pituitary cells and thyroid hormone adrenocortical cells for treatment of other hormonal disorders, to encapsulate other secreting cells for transplantation, and to package variety of pharmaceutical products and agricultural chemicals for controlled release.

Chang, Manchium; Kendall, James M.; Wang, Taylor G.

1989-01-01

441

Living Reviews in Relativity  

NSDL National Science Digital Library

Living Reviews in Relativity is a free refereed electronic journal published by the Max Planck Institute for Gravitational Physics (Albert-Einstein Institute). The journal currently contains four articles on quantum gravity, numerical cosmology, and Einstein's equations. Topics covered in future articles will include gravitational wave detection and astrophysics. Articles can be searched based on author, keyword, title, journal, year, and format. Users can choose to have the results output to the screen or as an email message. An email alerting service is available to notify readers of the publication of new articles.

442

Living Reviews in Relativity  

NSDL National Science Digital Library

Living Reviews in Relativity is a free refereed electronic journal published by the Max Planck Institute for Gravitational Physics (Albert-Einstein Institute). The journal currently contains four articles on quantum gravity, numerical cosmology, and Einstein's equations. Topics covered in future articles will include gravitational wave detection and astrophysics. Articles can be searched based on author, keyword, title, journal, year, and format. Users can choose to have the results output to the screen or as an email message. An email alerting service is available to notify readers of the publication of new articles.

2007-04-29

443

"Living versus Dead":  

PubMed Central

Summary The Semple antirabies vaccine was developed by David Semple in India in 1911. Semple introduced a peculiarly British approach within the Pasteurian tradition by using carbolized dead virus. This article studies this unique phase of vaccine research between 1910 and 1935 to show that in the debates and laboratory experiments around the potency and safety of vaccines, categories like "living" and "dead" were often used as ideological and moral denominations. These abstract and ideological debates were crucial in defining the final configuration of the Semple vaccine, the most popular antirabies vaccine used globally, and also in shaping international vaccination policies. PMID:21037397

Chakrabarti, Pratik

2010-01-01

444

Periodic Table Live!  

NSDL National Science Digital Library

Periodic Table Live!, produced by the Division of Chemical Education at the University of Wisconsin-Madison, allows users "to explore a broad range of information about the elements, their reactions, their properties, their structures and their histories." After selecting an element from the periodic table, users can access a myriad of information divided into three sections: Description, Physical, and Atomic. Students can view short videos of many of the elements' reactions with air, water, acids, and bases. The website is equipped with a helpful glossary and images of the elements, scientists, and other related items.

445

Mature and old-growth riparian forests: structure, dynamics, and effects on Adirondack stream habitats.  

PubMed

Riparian forests regulate linkages between terrestrial and aquatic ecosystems, yet relationships among riparian forest development, stand structure, and stream habitats are poorly understood in many temperate deciduous forest systems. Our research has (1) described structural attributes associated with old-growth riparian forests and (2) assessed linkages between these characteristics and in-stream habitat structure. The 19 study sites were located along predominantly first- and second-order streams in northern hardwood-conifer forests in the Adirondack Mountains of New York (U.S.A.). Sites were classified as mature forest (6 sites), mature with remnant old-growth trees (3 sites), and old-growth (10 sites). Forest-structure attributes were measured over stream channels and at varying distances from each bank. In-stream habitat features such as large woody debris (LWD), pools, and boulders were measured in each stream reach. Forest structure was examined in relation to stand age using multivariate techniques, ANOVA, and linear regression. We investigated linkages between forest structure and stream characteristics using similar methods, preceded by information-theoretic modeling (AIC). Old-growth riparian forest structure is more complex than that found in mature forests and exhibits significantly greater accumulations of aboveground tree biomass, both living and dead. In-stream LWD volumes were significantly (alpha = 0.05) greater at old-growth sites (200 m3/ha) compared to mature sites (34 m3/ha) and were strongly related to the basal area of adjacent forests. In-stream large-log densities correlated strongly with debris-dam densities. AIC models that included large-log density, debris-dam density, boulder density, and bankfull width had the most support for predicting pool density. There were higher proportions of LWD-formed pools relative to boulder-formed pools at old-growth sites as compared to mature sites. Old-growth riparian forests provide in-stream habitat features that have not been widely recognized in eastern North America, representing a potential benefit from late-successional riparian forest management and conservation. Riparian management practices (including buffer delineation and restorative silvicultural approaches) that emphasize development and maintenance of late-successional characteristics are recommended where the associated in-stream effects are desired. PMID:17494402

Keeton, William S; Kraft, Clifford E; Warren, Dana R

2007-04-01

446

Riparian and in-stream controls on nutrient concentrations along a headwater forested stream  

NASA Astrophysics Data System (ADS)

Headwater streams have a strong capacity to transform and retain nutrients, and thus, a longitudinal decrease in stream nutrient concentrations would be expected from in-stream nutrient removal alone. Yet, a number of other factors within the catchment, including biogeochemical processing within the riparian zone and export to streams, can contribute to stream nutrient concentration, which may overcome the effect of in-stream biogeochemical processing. To explore this idea, we analyzed the longitudinal patterns of stream and riparian groundwater concentrations for chloride (Cl-), nitrate (NO3-), ammonium (NH4+), and phosphate (PO43-) along a 3.7 km reach at an annual scale. The reach showed a gradual increase in stream and riparian width, riparian tree basal area, and abundance of riparian N2-fixing tree species. Concentrations of Cl- indicated a~strong hydrological connection at the riparian-stream edge. However, stream and riparian groundwater nutrient concentrations showed a moderate to null correlation, suggesting high biogeochemical processing at the riparian-stream edge and within the stream. A mass balance approach along the reach indicated that, on average, in-stream net nutrient uptake prevailed over release for NH4+ and PO43-, but not for NO3-. On an annual basis, in-stream processes contributed to change stream input fluxes by 11%, 26%, and 29% for NO3-, NH4+, and PO43-, respectively. Yet, longitudinal trends in concentration were not consistent with the prevailing in-stream biogeochem ical processes. During the riparian dormant period, stream concentration decreased along the reach for NO3-, but increased for NH4+ and PO43-. During the riparian vegetative period, NO3- and PO43- increased along the reach while NH4+ showed no clear pattern. These longitudinal trends were partially related to riparian forest features and groundwater inputs, especially for NO3- and PO43-. Our study suggests that even though in-stream biogeochemical processing was substantial, the riparian zone can modulate the longitudinal variation in stream nutrient chemistry in this headwater stream.

Bernal, S.; Lupon, A.; Ribot, M.; Sabater, F.; Mart, E.

2014-07-01

447

Cold stream stability during minor mergers  

E-print Network

We use high-resolution Eulerian simulations to study the stability of cold gas flows in a galaxy size dark matter halo (10^12 Msun) at redshift z=2. Our simulations show that a cold stream penetrating a hot gaseous halo is stable against thermal convection and Kelvin-Helmholtz instability. We then investigate the effect of a satellite orbiting the main halo in the plane of the stream. The satellite is able to perturb the stream and to inhibit cold gas accretion towards the center of the halo for 0.5 Gyr. However, if the supply of cold gas at large distances is kept constant, the cold stream is able to re-establish itself after 0.3 Gyr. We conclude that cold streams are very stable against a large variety of internal and external perturbations.

Wang, Liang; Feng, Longlong; Macci, Andrea V; Chang, Jiang; Kang, Xi

2014-01-01

448

The composition of corotating energetic particle streams  

NASA Technical Reports Server (NTRS)

The relative abundances of 1.5 to 23 MeV/nucleon ions in corotating nucleon streams were compared with ion abundances in particle events associated with solar flares and with solar and solar wind abundances. He/O and C/O ratios were found to be a factor of the order two to three times greater in corotating streams than in flare associated events. The distribution of H/He ratios in corotating streams was found to be much narrower and of lower average value than in flare associated events. H/He in corotating energetic particle streams compared favorably both in lack of variability and numerical value to H/He in high speed solar wind plasma streams. This comparison suggested that the source population for the corotating energetic particles was the solar wind.

Mcguire, R. E.; Von Renvinge, T. T.; Mcdonald, F. B.

1978-01-01

449

Describing Story Evolution from Dynamic Information Streams  

SciTech Connect

Sources of streaming information, such as news syndicates, publish information continuously. Information portals and news aggregators list the latest information from around the world enabling information consumers to easily identify events in the past 24 hours. The volume and velocity of these streams causes information from prior days to quickly vanish despite its utility in providing an informative context for interpreting new information. Few capabilities exist to support an individual attempting to identify or understand trends and changes from streaming information over time. The burden of retaining prior information and integrating with the new is left to the skills, determination, and discipline of each individual. In this paper we present a visual analytics system for linking essential content from information streams over time into dynamic stories that develop and change over multiple days. We describe particular challenges to the analysis of streaming information and explore visual representations for showing story change and evolution over time.

Rose, Stuart J.; Butner, R. Scott; Cowley, Wendy E.; Gregory, Michelle L.; Walker, Julia

2009-10-12

450

Comet Machholz and the Quadrantid meteor stream  

NASA Astrophysics Data System (ADS)

Until quite recently, the Quadrantid meteor stream was considered to be an 'orphan'. Because of the difficulty in accounting for the large difference in the longitudes of the ascending nodes, McIntosh (1990) suggested that Comet Machholz and the stream have a sibling rather than a parent-child relationship. Gonczi et al. (1992) proposed that gravitational perturbations by Jupiter may be amplified sufficiently by the 2:1 resonance of the stream with Jupiter to explain the difference in the longitudes of ascending nodes if the stream was born when the comet's perihelion distance was last at its minimum about 4000 yr ago. In this paper, we show by computer simulations that, if the comet was captured at its last close approach with Jupiter about 2200 yr ago, there has been sufficient time for the resulting stream to produce most of the features of the presently observed Quadrantid/Arietid/Southern Delta-Aquarid complex.

Jones, J.; Jones, W.

1993-04-01

451

Enhanced Reality Live Role Playing  

Microsoft Academic Search

Live role-playing is a form of improvisational theatre played for the experience of the performers and without an audience. These games form a challenging application domain for ubiquitous technology. We discuss the design options for enhanced reality live role-playing and the role of technology in live role-playing games.

Jonas Sderberg; Annika Waern; Karl-Petter kessson; Staffan Bjrk; Jennica Falk

452

Unionville, Pennsylvania School's Stream Restoration Project  

NASA Astrophysics Data System (ADS)

For the past three years, students and Earth Club members of C.F. Patton Middle School and Unionville High School have been involved in a stream restoration and monitoring project along a tributary to the East Branch of the Red Clay Creek in Pennsylvania. The Red Clay is within the larger Christina River Basin watershed which drains to Delaware Bay. Total funding of \\$962.00 was awarded by the Unionville-Chadds Ford Education Foundation to purchase both stream monitoring equipment and native plant species for stream restoration. Nine science teachers in the school district received certification in stream monitoring by the Pennsylvania State Parks Division. Certification enables the science faculty and their students to enter monitoring data in a statewide stream database. The stream data includes: temperature, levels of dissolved oxygen and nutrients, pH, alkalinity, conductivity, and a complete biosurvey of invertebrates. In addition to ongoing monitoring, the Earth Club sponsored a name-the-stream contest. Quartz Creek was chosen for this previously unnamed tributary. Its' name was approved by the East Marlborough Township Supervisor in May, 2004 and was then submitted to the USGS' Board on Geographic Names. The Earth Club has also sponsored a stream restoration contest. Students in the middle school were encouraged to design a habitat along the stream banks that would keep sediment in-place, while encouraging wildlife. The stream was originally crowded with invasive multi-flora rose but this was removed with the help of parents and students over a two year period. The winning student poster was outstanding and native species were purchased and planted following the poster's design. The planting took place in May, 2004 with over 40 persons involved including 25 middle school and 8 high school students, teachers from the schools, administrators and employees of the Brandywine Conservancy, and Red Clay Valley and Brandywine Valley Associations, and graduate students from the University of Delaware.

Madsen, S. M.

2004-12-01

453

Ebullitive methane emissions from oxygenated wetland streams.  

PubMed

Stream and river carbon dioxide emissions are an important component of the global carbon cycle. Methane emissions from streams could also contribute to regional or global greenhouse gas cycling, but there are relatively few data regarding stream and river methane emissions. Furthermore, the available data do not typically include the ebullitive (bubble-mediated) pathway, instead focusing on emission of dissolved methane by diffusion or convection. Here, we show the importance of ebullitive methane emissions from small streams in the regional greenhouse gas balance of a lake and wetland-dominated landscape in temperate North America and identify the origin of the methane emitted from these well-oxygenated streams. Stream methane flux densities from this landscape tended to exceed those of nearby wetland diffusive fluxes as well as average global wetland ebullitive fluxes. Total stream ebullitive methane flux at the regional scale (103MgCyr(-1) ; over 6400km(2) ) was of the same magnitude as diffusive methane flux previously documented at the same scale. Organic-rich stream sediments had the highest rates of bubble release and higher enrichment of methane in bubbles, but glacial sand sediments also exhibited high bubble emissions relative to other studied environments. Our results from a database of groundwater chemistry support the hypothesis that methane in bubbles is produced in anoxic near-stream sediment porewaters, and not in deeper, oxygenated groundwaters. Methane interacts with other key elemental cycles such as nitrogen, oxygen, and sulfur, which has implications for ecosystem changes such as drought and increased nutrient loading. Our results support the contention that streams, particularly those draining wetland landscapes of the northern hemisphere, are an important component of the global methane cycle. PMID:24756991

Crawford, John T; Stanley, Emily H; Spawn, Seth A; Finlay, Jacques C; Loken, Luke C; Striegl, Robert G

2014-11-01

454

Spatially distributed estimates of riparian stream shading from remote sensing: effects of disturbance and relationship to stream temperature  

Microsoft Academic Search

Solar radiation has long been recognized as a major component of the energy budget of streams, and modeling of stream temperature across stream basins requires estimates of riparian stream shade over extensive areas. A variety of methods are available for measuring shade locally, including hemispherical photography, however these are impractical for distributed stream temperature modeling. Methods for estimating spatially distributed

C. H. Luce; B. Gutierrez; D. Nagel; J. Dunham

2005-01-01

455

Use of watershed characteristics to select control streams for estimating effects of metal mining wastes on extensively disturbed streams  

Microsoft Academic Search

Impacts of sediments and heavy metals on the biota of streams in the copper-mining district of southwestern Montana were examined by comparing aquatic communities of impacted streams with those of control streams. Control streams were chosen through the use of a technique that identifies similar streams based on similarities in their watershed characteristics. Significant differences between impacted and control sites

Robert M. Hughes

1985-01-01

456

Toward new peering strategies for push-pull based P2P streaming systems  

Microsoft Academic Search

Recently, several mesh-based P2P live streaming systems are adopting a push-pull mechanism instead of the classical pull mechanism. A push-pull mechanism is more efficient in terms of overhead and leads to much better playback delay performance because it eliminates the need of the three steps of pull content retrieval: buffer map broadcast, data request and data sending. Thus, using the

Anis Ouali; Brigitte Kerherv; Brigitte Jaumard

2009-01-01

457

On the design of contribution-aware P2P streaming networks  

Microsoft Academic Search

P2P live streaming networks recently become an emerging research topic. In such multimedia steaming networks, autonomous users cooperate with each other to provide a distributed, scalable, and cost-efficient transmission environment. However, since each user is self-interested such that they want to receive high-quality video with minimum upload bandwidth, full cooperation and stable playback quality can not be guaranteed. This paper

Yu-Wei Chan; Yeh-Ching Chung

2009-01-01

458

Impact of Buffer Map Cheating on the Streaming Quality in DONet  

Microsoft Academic Search

Data-driven Overlay Network (DONet) is especially suitable for live stream in P2P environment. However, it demands the cooperation\\u000a of individual nodes to exchange their buffer maps. Since these nodes are selfish and have their own interests, they might\\u000a cheat about their buffer maps to reduce the forwarding burden. We analyze the impact of this kind of cheating behavior on\\u000a the

Yong Cui; Dan Li; Jianping Wu

2007-01-01

459

Reversing the Lecture\\/Homework Paradigm Using eTEACH Web-based Streaming Video Software  

Microsoft Academic Search

A new online streaming video and multi-media application called eTEACH (http:\\/\\/eTEACH.engr.wisc.edu) was used to reform a large, lecture -based computer science course for engineering majors. In-class lectures were replaced with videotaped lectures and other materials that students viewed on the Internet on their own schedu le, making it possible to use the live class periods for small, team problem-solving sessions

Julie Foertsch; Gregory Moses; John Strikwerda; Mike Litzkow

460

The worm that lived  

PubMed Central

Organisms age because of the selection shadowthe decline of the force of natural selection with age. Seemingly straightforward corollary of this theory is the Medawar-Williams prediction, which maintains that increased extrinsic (non-aging) mortality will result in the evolution of accelerated aging and decreased longevity. Despite its centrality to modern thinking about the ultimate causes of aging, this prediction ignores the fact that mortality is often a non-random process depending on individual condition. Increased condition-dependent mortality inescapably results in increased selection for resistance against the agent of mortality. Provided that resistance to various stressors is commonly associated with increased longevity, the evolutionary outcome is no longer certain. We recently documented this experimentally by showing that populations of Caenorhabditis remanei evolved to live shorter under high extrinsic mortality, but only when mortality was applied haphazardly. On the contrary, when extrinsic mortality was caused by heat-shock, populations experiencing the same rate of increased mortality evolved greater longevities, notwithstanding increased selection shadow. Intriguingly, stress-resistant and long-lived worms were also more fecund. We discuss these results in the light of recent theoretical developments, such as condition-environment interactions and hyperfunction theory of aging. PMID:24778930

Chen, Hwei-yen; Maklakov, Alexei A

2013-01-01

461

Living Liquid Crystals  

E-print Network

Collective motion of self-propelled organisms or synthetic particles often termed active fluid has attracted enormous attention in broad scientific community because of it fundamentally non-equilibrium nature. Energy input and interactions among the moving units and the medium lead to complex dynamics. Here we introduce a new class of active matter, living liquid crystals (LLCs) that combine living swimming bacteria with a lyotropic liquid crystal. The physical properties of LLCs can be controlled by the amount of oxygen available to bacteria, by concentration of ingredients, or by temperature. Our studies reveal a wealth of new intriguing dynamic phenomena, caused by the coupling between the activity-triggered flow and long-range orientational order of the medium. Among these are (a) non-linear trajectories of bacterial motion guided by non-uniform director, (b) local melting of the liquid crystal caused by the bacteria-produced shear flows, (c) activity-triggered transition from a non-flowing uniform state into a flowing one-dimensional periodic pattern and its evolution into a turbulent array of topological defects, (d) birefringence-enabled visualization of microflow generated by the nanometers-thick bacterial flagella. Unlike their isotropic counterpart, the LLCs show collective dynamic effects at very low volume fraction of bacteria, on the order of 0.2%. Our work suggests an unorthodox design concept to control and manipulate the dynamic behavior of soft active matter and opens the door for potential biosensing and biomedical applications.

Shuang Zhou; Andrey Sokolov; Oleg D Lavrentovich; Igor S Aranson

2013-12-18

462

REGIONAL METHODS INITIATIVE: DEVELOPMENT OF BIOLOGICAL INDICATORS, METHODS AND ASSESSMENT TECHNIQUES IN FIRST ORDER AND INTERMITTENT STREAMS: HEADWATER INTERMITTENT STREAMS STUDY  

EPA Science Inventory

Headwater streams represent the majority of streams and stream miles within many stream networks. Because headwater streams represent the interface between surrounding land use and downstream waterbodies, there has been a growing interest in monitoring the condition of headwater...

463

Evaluating the reliability of the stream tracer approach to characterize stream-subsurface water exchange  

USGS Publications Warehouse

Stream water was locally recharged into shallow groundwater flow paths that returned to the stream (hyporheic exchange) in St. Kevin Gulch, a Rocky Mountain stream in Colorado contaminated by acid mine drainage. Two approaches were used to characterize hyporheic exchange: sub- reach-scale measurement of hydraulic heads and hydraulic conductivity to compute streambed fluxes (hydrometric approach) and reachscale modeling of in- stream solute tracer injections to determine characteristic length and timescales of exchange with storage zones (stream tracer approach). Subsurface data were the standard of comparison used to evaluate the reliability of the stream tracer approach to characterize hyporheic exchange. The reach-averaged hyporheic exchange flux (1.5 mL s-1 m-1), determined by hydrometric methods, was largest when stream base flow was low (10 L s-1); hyporheic exchange persisted when base flow was 10- fold higher, decreasing by approximately 30%. Reliability of the stream tracer approach to detect hyporheic exchange was assessed using first- order uncertainty analysis that considered model parameter sensitivity. The stream tracer approach did not reliably characterize hyporheic exchange at high base flow: the model was apparently more sensitive to exchange with surface water storage zones than with the hyporheic zone. At low base flow the stream tracer approach reliably characterized exchange between the stream and gravel streambed (timescale of hours) but was relatively insensitive to slower exchange with deeper alluvium (timescale of tens of hours) that was detected by subsurface measurements. The stream tracer approach was therefore not equally sensitive to all timescales of hyporheic exchange. We conclude that while the stream tracer approach is an efficient means to characterize surface-subsurface exchange, future studies will need to more routinely consider decreasing sensitivities of tracer methods at higher base flow and a potential bias toward characterizing only a fast component of hyporheic exchange. Stream tracer models with multiple rate constants to consider both fast exchange with streambed gravel and slower exchange with deeper alluvium appear to be warranted.

Harvey, J.W.; Wagner, B.J.; Bencala, K.E.

1996-01-01

464

Effects of urbanization on stream channel morpology, Madisonville, Texas  

E-print Network

This thesis investigates the effects of urban development on two small streams near Madisonville, Texas. One stream is natural and used as a control against which Town Branch, the urbanized stream, is compared. Changes in width, depth, and channel...

Harris, Daniel Lee

2012-06-07

465

Lagrangian Coherent Structures from Video Streams of Jupiter  

E-print Network

Jupiter's fast rotation - one rotation over 10 hours - creates strong jet streams, smearing its clouds into linear bands of dark and light zonal belts that circle the planet on lines of almost constant latitude. Such a high degree of axisymmetry is absent in our own atmosphere. Moreover, Jupiter has the largest and longest-living known atmospheric vortex, the Great Red Spot (GRS). Such vortices abound in nature, but GRS's size, long-term persistence, and temporal longitudinal oscillations make it unique. Here, we uncover, for the first time, unsteady material structures that form the cores of zonal jets and the boundary of the GRS in Jupiter's atmosphere. We perform our analysis on a velocity field extracted from a video footage acquired by the NASA Cassini spacecraft.

Hadjighasem, Alireza

2014-01-01

466

Lagrangian Coherent Structures from Video Streams of Jupiter  

E-print Network

Jupiter's fast rotation - one rotation over 10 hours - creates strong jet streams, smearing its clouds into linear bands of dark and light zonal belts that circle the planet on lines of almost constant latitude. Such a high degree of axisymmetry is absent in our own atmosphere. Moreover, Jupiter has the largest and longest-living known atmospheric vortex, the Great Red Spot (GRS). Such vortices abound in nature, but GRS's size, long-term persistence, and temporal longitudinal oscillations make it unique. Here, we uncover, for the first time, unsteady material structures that form the cores of zonal jets and the boundary of the GRS in Jupiter's atmosphere. We perform our analysis on a velocity field extracted from a video footage acquired by the NASA Cassini spacecraft.

Alireza Hadjighasem; George Haller

2014-07-15

467

Live From the Poles  

NASA Astrophysics Data System (ADS)

International Polar Year presents an extraordinary opportunity to educate students and the public about science at the icy ends of the Earth. The goal of our proposal is to apply collaborative multimedia approaches to bring the story of four polar research expeditions to the general public and the classroom. The four expeditions (measurement of ice sheet dynamics in Greenland, a study of the McMurdo ecosystem over austral winter, installation of a buoy array in the Beaufort Gyre, and exploration of the Gakkel Ridge) were chosen based on their broad range of disciplines and relevance to the three primary IPY research emphasis areas defined by NSF. A science writer and a professional photographer will join each expedition and file dispatches for a daily Webcast. The posting will feature science updates, logistical challenges, team member profiles, and life at sea (or on the ice). The writer will also coordinate real-time phone patches from PIs in the field to audiences at the Museum of Science, Boston, the Smithsonian National Museum of Natural History, The Field Museum, Chicago, the Houston Museum of Natural Science, the Birch Aquarium, San Diego, the Pacific Science Center, Seattle, National Public Radio "Talk of the Nation: Science Friday," CBS News, and to student "reporters" writing for Scholastic Online. At the museums, the "Live from the Ice" interactive phone calls will be preceded by a background presentation by a scientist, who will also moderate the live discussion between the public and researchers in the field. A 20-30 minute satellite phone call will allow the public to ask the researchers questions about their research while it's happening. In addition to building and promoting an online experience, a museum exhibit featuring models of Arctic instruments and informative kiosks will be developed at the Woods Hole Oceanographic Institution Exhibit Center. Each of our partner museums will also provide a "leave-behind" component to continue to educate visitors before and after the live talks. This project will bring the remote Polar Regions and the scientists that are studying them to audiences across the United States.

Linder, C. A.; Kent, J.; Lippsett, L.

2006-12-01

468

Toward living radical polymerization.  

PubMed

Radical polymerization is one of the most widely used processes for the commercial production of high-molecular-weight polymers. The main factors responsible for the preeminent position of radical polymerization are the ability to polymerize a wide array of monomers, tolerance of unprotected functionality in monomer and solvent, and compatibility with a variety of reaction conditions. Radical polymerization is simple to implement and inexpensive in relation to competitive technologies. However, conventional radical polymerization severely limits the degree of control that researchers can assert over molecular-weight distribution, copolymer composition, and macromolecular architecture. This Account focuses on nitroxide-mediated polymerization (NMP) and polymerization with reversible addition-fragmentation chain transfer (RAFT), two of the more successful approaches for controlling radical polymerization. These processes illustrate two distinct mechanisms for conferring living characteristics on radical polymerization: reversible deactivation (in NMP) and reversible or degenerate chain transfer (in RAFT). We devised NMP in the early 1980s and have exploited this method extensively for the synthesis of styrenic and acrylic polymers. The technique has undergone significant evolution since that time. New nitroxides have led to faster polymerization rates at lower temperatures. However, NMP is only applicable to a restricted range of monomers. RAFT was also developed at CSIRO and has proven both more robust and more versatile. It is applicable to the majority of monomers subject to radical polymerization, but the success of the polymerization depends upon the selection of the RAFT agent for the monomers and reaction conditions. We and other groups have proposed guidelines for selection, and the polymerization of most monomers can be well-controlled to provide minimal retardation and a high fraction of living chains by using one of just two RAFT agents. For example, a tertiary cyanoalkyl trithiocarbonate is suited to (meth)acrylate, (meth)acrylamide, and styrenic monomers, while a cyanomethyl xanthate or dithiocarbamate works with vinyl monomers, such as vinyl acetate or N-vinylpyrrolidone. With the appropriate choice of reagents and polymerization conditions, these reactions possess most of the attributes of living polymerization. We have used these methods in the synthesis of well-defined homo-, gradient, diblock, triblock, and star polymers and more complex architectures, including microgels and polymer brushes. Applications of these polymers include novel surfactants, dispersants, coatings and adhesives, biomaterials, membranes, drug-delivery media, electroactive materials, and other nanomaterials. PMID:18700787

Moad, Graeme; Rizzardo, Ezio; Thang, San H

2008-09-01

469

Impact of Invasive Fish on Nitrogen Transport to Adjacent Stream Habitats  

NASA Astrophysics Data System (ADS)

Consumers can alter in-situ ecosystem processes, but less is known about their impacts on adjacent habitats. Animals may influence ecosystem dynamics in adjacent areas, especially if energy is exchanged between systems. Lake trout (Salvelinus namaycush) were introduced to Yellowstone Lake and are reducing the native Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) through predation. Both trout live in Yellowstone Lake, but only cutthroat spawn in and transport nutrients to streams. To estimate the indirect impact of lake trout on nutrient cycling in adjacent streams, we estimated how much nitrogen cutthroat transport. Spawners supplied 100 mg NH4-N m-2d-1 prior to lake trout when 50,000 cutthroat spawned, but only 1.8 mg NH4-N m-2d-1 to tributary streams in 2004 when 1,400 fish spawned. In contrast, cutthroat excreted 5.9 mg NH4-N m-2d-1 in Yellowstone Lake prior to lake trout and only 1.9 mg NH4-N m-2d-1 currently. Given a 90 day spawning period, tributary streams are more impacted (8,838 mg NH4-N m-2yr-1) than Yellowstone Lake (1,460 mg NH4-N m-2yr-1). Consumers can have large impacts not only in their primary habitat, but also in neighboring areas. Less transported nitrogen could reduce stream primary and secondary production, and cutthroat recruitment through time.

Tronstad, L.; Hall, R.; Koel, T.

2005-05-01

470

Charting the trajectory of the ATLAS stream  

NASA Astrophysics Data System (ADS)

Stellar streams provide dramatic confirmation that large systems accrete smaller systems, in the context of a hierarchical merging cosmology, and therefore contain important clues about the formation mechanism of the Galactic halo. By studying the detailed properties of streams we can determine how stars are stripped from their hosts due to the Galactic tidal field and how the formation of the Galactic halo may have proceeded. Here we propose to trace the full visible extent of the recently discovered ATLAS stream using deep, wide-field photometry, to determine its path across the sky in 3 dimensions. By utilising the very wide-field capabilities of DECam, we will determine the deep, MW decontaminated CMD in a 30 degree long portion of the stream, allowing us to determine the distance, density profile and stellar population makeup of the stream. The position and density on the sky of kinematically cold structures like the ATLAS stream provides powerful, unbiased constraints on the distribution of dark matter in the Galaxy. Furthermore, deep photometry of the stellar content of the stream will tell us what type of system was the likely progenitor: globular cluster, ultra-faint dwarf or dSph galaxy.

de Boer, Thomas; Belokurov, Vasily; Koposov, Sergey; Irwin, Mike; Erkal, Denis

2014-08-01

471

Limitations and Implications of Stream Classification  

NASA Astrophysics Data System (ADS)

Stream classifications that are based on channel form, such as the Rosgen Level II classification, are useful tools for the physical description and grouping of streams and for providing a means of communication for stream studies involving scientists and (or) managers with different backgrounds. The Level II classification also is used as a tool to assess stream stability, infer geomorphic processes, predict future geomorphic response, and guide stream restoration or rehabilitation activities. The use of the Level II classification for these additional purposes is evaluated in this paper. Several examples are described to illustrate the limitations and management implications of the Level II classification. Limitations include: (1) time dependence, (2) uncertain applicability across physical environments, (3) difficulty in identification of a true equilibrium condition, (4) potential for incorrect determination of bankfull elevation, and (5) uncertain process significance of classification criteria. Implications of using stream classifications based on channel form, such as Rosgen's, include: (1) acceptance of the limitations, (2) acceptance of the risk of classifying streams incorrectly, and (3) classification results may be used inappropriately. It is concluded that use of the Level II classification for purposes beyond description and communication is not appropriate. Research needs are identified that, if addressed, may help improve the usefulness of the Level II classification.

Juracek, Kyle E.; Fitzpatrick, Faith A.

2003-06-01

472

The Fornax-Leo-Sculptor stream revisited  

NASA Technical Reports Server (NTRS)

Lynden-Bell first demonstrated that the satellites of the Milky Way appear situated along two great 'streams' in the sky: the 'Magellanic stream' and the 'Fornax-Leo-Sculptor (FLS) stream.' Further exploration of the three-dimensional distribution of Galactic satellites reveals that the recently discovered Sextans and Phoenix dwarf spheroidal galaxies also lie near the plane defined by the FLS galaxies, and therefore strengthens the evidence in favor of the FLS stream. Moreover, a specific group of globular clusters -- those exhibiting the reddest horizontal branches (HBs) among those identified as 'young halo' by Zinn -- appear to populate the FLS stream. As previously demonstrated by Zinn, the spatial distribution of old halo globulars appears to be flattened toward the Galactic plane, and therefore the old halo clusters are typically anti-correlated to the nearly orthogonal FLS stream. A scenario is postulated wherein the Galactic satellites of the FLS stream and the red HB, young halo globular clusters share a common origin in the accretion of a formerly larger, parent satellite galaxy or Searle & Zinn 'fragment.'

Majewski, Steven R.

1994-01-01

473

Ecological health in the Nation's streams  

USGS Publications Warehouse

Aquatic biological communities, which are collections of organisms, are a direct measure of stream health because they indicate the ability of a stream to support life. This fact sheet highlights selected findings of a national assessment of stream health by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS). The assessment was unique in that it integrated the condition of three biological communitiesalgae, macroinvertebrates, and fishas well as measures of streamflow modification, pesticides, nutrients, and other factors. At least one biological community was altered at 83 percent of assessed streams, and the occurrence of altered communities was highest in urban streams. Streamflows were modified at 86 percent of assessed streams, and increasing severity of streamflow modification was associated with increased occurrence of altered biological communities. Agricultural and urban land use in watersheds may contribute pesticides and nutrients to stream waters, and increasing concentrations of these chemicals were associated with increased occurrence of altered biological communities.

Carlisle, Daren M.; Woodside, Michael D.

2013-01-01

474

Water discharged from the gulf stream north of Cape Hatteras. (Reannouncement with new availability information)  

SciTech Connect

Satellite radiometer-derived sea surface temperature images together with moored instrument and hydrographic survey data indicate that water ejected from the Gulf Stream often occupies the upper 200 m of the water column over the continental slope between Cape Hatteras and Hudson Canyon. At times this water resembles the energetic Gulf Stream frontal eddies commonly seen to the south of Cape Hatteras. However, many of the observed parcels of this water differ markedly from frontal eddies and Gulf Stream warm-core rings and so appear to form a class of discharged Gulf Stream water distinct from any previously reported. These parcels generally cover a broad area (compared with frontal eddies), contain relatively weak currents (generally < 40 cm/s at 100 m), and are remarkably long-lived (sometimes distinguishable for more than 2 months). Sanity anomaly distributions indicate that despite their persistence, these water masses contain intrusions of and mix with surrounding lower-salinity water, particularly in the upper So m. Continuity of various tracers along surfaces reveals that the discharged Gulf Stream water observed near the sea surface originated within the nutrient-bearing stratum of the Gulf Stream, having upwelled hundreds of meters along density surfaces. As a result, it tends to enhance nutrient concentrations over the continental slope, to a significant extent at 100 m depth but only marginally at 50 m depth. By contrast, this water does not carry unusually large kinetic energy densities into the slope region, but apparently gives up a good deal of kinetic energy, on the order of 10,000 sq cm/sec sq. per unit mass, while leaving the Gulf Stream.

Churchill, J.H.; Cornillon, P.C.

1991-12-31

475

Biological Conditions in Streams of Johnson County, Kansas, and Nearby Missouri, 2003 and 2004  

USGS Publications Warehouse

Johnson County is one of the fastest growing and most populated counties in Kansas. Urban development affects streams by altering stream hydrology, geomorphology, water chemistry, and habitat, which then can lead to adverse effects on fish and macroinvertebrate communities. In addition, increasing sources of contaminants in urbanizing streams results in public-health concerns associated with exposure to and consumption of contaminated water. Biological assessments, or surveys of organisms living in aquatic environments, are crucial components of water-quality programs because they provide an indication of how well water bodies support aquatic life. This fact sheet describes current biological conditions of Johnson County streams and characterizes stream biology relative to urban development. Biological conditions were evaluated by collecting macroinvertebrate samples from 15 stream sites in Johnson County, Kansas, in 2003 and 2004 (fig. 1). Data from seven additional sites, collected as part of a separate study with similar objectives in Kansas and Missouri (Wilkison and others, 2005), were evaluated to provide a more comprehensive assessment of watersheds that cross State boundaries. Land-use and water- and streambed-sediment-quality data also were used to evaluate factors that may affect macroinvertebrate communities. Metrics are indices used to measure, or evaluate, macroinvertebrate response to various factors such as human disturbance. Multimetric scores, which integrated 10 different metrics that measure various aspects of macroinvertebrate communities, including organism diversity, composition, tolerance, and feeding characteristics, were used to evaluate and compare biological health of Johnson County streams. This information is useful to city and county officials for defining current biological conditions, evaluating conditions relative to State biological criteria, evaluating effects of urbanization, developing effective water-quality management plans, and documenting changes in biological conditions and water quality.

Poulton, Barry C.; Rasmussen, Teresa J.; Lee, Casey J.

2007-01-01

476

Flood characteristics of Alaskan streams  

USGS Publications Warehouse

Peak discharge data for Alaskan streams are summarized and analyzed. Multiple-regression equations relating peak discharge magnitude and frequency to climatic and physical characteristics of 260 gaged basins were determined in order to estimate average recurrence interval of floods at ungaged sites. These equations are for 1.25-, 2-, 5-, 10-, 25-, and 50-year average recurrence intervals. In this report, Alaska was divided into two regions, one having a maritime climate with fall and winter rains and floods, the other having spring and summer floods of a variety or combinations of causes. Average standard errors of the six multiple-regression equations for these two regions were 48 and 74 percent, respectively. Maximum recorded floods at more than 400 sites throughout Alaska are tabulated. Maps showing lines of equal intensity of the principal climatic variables found to be significant (mean annual precipitation and mean minimum January temperature), and location of the 260 sites used in the multiple-regression analyses are included. Little flood data have been collected in western and arctic Alaska, and the predictive equations are therefore less reliable for those areas. (Woodard-USGS)

Lamke, R.D.

1979-01-01

477

Live Long and Prosper  

NSDL National Science Digital Library

Consider the changes. Yesterday's one-room schoolhouse had one teacher responsible for every subject, every grade, and maintenance of the classroom and schoolhouse. Today's self-contained classroom has one teacher responsible for a diverse group of students with wide-ranging abilities and needs; integrated learning of subjects from the basics to social and behavioral issues; and a roomful of widgets--high-tech, low-tech, and all that's in between. Everything has changed, yet everything remains the same. You, the teacher, remain responsible for everyone and for everything that goes on in your classroom. This chapter offers some closing insights and suggestions to help you "live long and prosper" in the science classroom.

Texley, Juliana; Kwan, Terry

2002-01-01

478

He Lived among us  

NASA Astrophysics Data System (ADS)

I initially got acquainted with Anatoly Larkin at the first Odessa theoretical school, probably in 1959. Amid the brilliant company gathered in Odessa (Abrikosov, Khalatnikov, Gorkov, Keldysh, Perel, Pitaevsky), he astonished me at the time with his fundamentality, the soundness of his judgment and the ease of his receptiveness to new ideas. Later in Novosibirsk, where I lived then, Roald Sagdeev told me A. B. Migdal, Tolya's research supervisor for graduate work, had invited Tolya to move with him to Novosibirsk, to the Budker Institute of Nuclear Physics, with the promise of a fast-track academic career. Tolya refused, and then A.B., who held Tolya's opinion and collaboration in high regard, also decided to stay in Moscow...

Pokrovsky, V. L.

2013-06-01

479

Living with nuclear weapons  

SciTech Connect

At Harvard President Derek Bok's request, six Harvard professors explain nuclear arms issues to help citizens understand all sides of the national security debates. The goal is to encourage public participation in policy formulation. The book emphasizes that escapism will not improve security; that idealistic plans to eliminate nuclear weapons are a form of escapism. Learning to live with nuclear weapons, they suggest, requires an understanding of the current nuclear predicament and the implications of alternative weapons and policy choices. After reviewing these matters, they emphasize that informed persons will continue to disagree, but that knowledge will improve understanding and appreciation of their differences and improve the quality of policy debates. 54 references, 5 figures, 2 tables. (DCK)

Carnesale, A.; Doty, P.; Hoffmann, S.; Huntington, S.P.; Nye, J.S. Jr.; Sagan, S.D.

1983-01-01

480

Live! From 2-Alpha  

NSDL National Science Digital Library

This activity is one of several in which students are required to access and analyze actual data from NASA missions, including video "interviews" with real NASA scientists, to solve a mystery. In this mystery, students learn about the force of gravity and how scientists analyze data by studying the properties of different objects in space. Live! From 2-Alpha can be used to support instruction about forces and motion, origin and evolution of the universe, and the interaction of energy and matter. This activity is one of several in "Space Mysteries," a series of inquiry-driven, interactive Web explorations. Each Mystery in "Space Mysteries" is designed to teach at least one physical science concept (e.g. interactions of energy and matter, structures and properties of matter, energy, motion, or forces), and is accompanied by materials to be used by classroom teachers.

481

Methods of separating particulate residue streams  

DOEpatents

A particulate residue separator and a method for separating a particulate residue stream may include an air plenum borne by a harvesting device, and have a first, intake end and a second, exhaust end; first and second particulate residue air streams that are formed by the harvesting device and that travel, at least in part, along the air plenum and in a direction of the second, exhaust end; and a baffle assembly that is located in partially occluding relation relative to the air plenum and that substantially separates the first and second particulate residue air streams.

Hoskinson, Reed L. (Rigby, ID); Kenney, Kevin L. (Idaho Falls, ID); Wright, Christopher T. (Idaho Falls, ID); Hess, J. Richard (Idaho Falls, ID)

2011-04-05

482

Events and Trends in Text Streams  

SciTech Connect

"Text streams--collections of documents or messages that are generated and observed over time--are ubiquitous. Our research and development are targeted at developing algorithms to find and characterize changes in topic within text streams. To date, this research has demonstrated the ability to detect and describe 1) short duration, atypical events and 2) the emergence of longer-term shifts in topical content. This technology has been applied to predefined temporally ordered document collections but is also suitable for application to near-real-time textual data streams."

Engel, David W.; Whitney, Paul D.; Cramer, Nicholas O.

2010-03-04

483

Herbicides in streams. Midwestern United States  

USGS Publications Warehouse

Results from a 2-year study of 149 streams geographically distributed across the corn-producing region of 10 midwestern States show that detectable concentrations of herbicides persist year round in most streams. Some herbicides exceeded proposed maximum contaminant levels for drinking water for periods of several weeks to several months following application. Atrazine was the most frequently detected and most persistent herbicide measured, followed by desethylatrazine and metolachlor. The seasonal distribution of atrazine indicates that aquifers contributing base flow to many of the streams are contaminated with herbicides.

Goolsby, Donald A.; Thurman, E. Michael; Kolpin, Dana W.

1991-01-01

484

Living on the Ground: Research Which Sustains Living Culture  

Microsoft Academic Search

Living on the Ground is a research practice that positions non-Indigenous researchers as partners with Indigenous peoples as they themselves act to foster individual resilience and promote collective sustainability in their\\u000a community. Based on Indigenous Self-Determination, Relationship and Phenomenological Presence, Living on the Ground is a\\u000a process of inquiry which furthers the local peoples Living Culture, an empowering cultural force

Zohl Ishtar

485

Stream-Network navigation in the U.S. geological survey streamStats web application  

USGS Publications Warehouse

StreamStats is a U.S. Geological Survey Webbased geographic information systems application developed as a tool for water-resources planning and management, engineering design, and other applications. The primary functionality of StreamStats allows users to obtain drainage-basin boundaries, basin characteristics, and streamflow statistics for gaged and ungaged sites. Recently, tools that allow stream-network navigation were added to StreamStats. These tools allow users to select any point along a stream and locate activities upstream and downstream from the selected point, such as streamgaging stations, dams, and point-source discharges, and obtain information about such activities. Users also can obtain stream-reach addresses and estimates of streamflow statistics for the selected points.

Ries, K. G.; Steeves, P. A.; Guthrie, J. D.; Rea, A. H.; Stewart, D. W.

2009-01-01

486

Noise Prediction Module for Offset Stream Nozzles  

NASA Technical Reports Server (NTRS)

A Modern Design of Experiments (MDOE) analysis of data acquired for an offset stream technology was presented. The data acquisition and concept development were funded under a Supersonics NRA NNX07AC62A awarded to Dimitri Papamoschou at University of California, Irvine. The technology involved the introduction of airfoils in the fan stream of a bypass ratio (BPR) two nozzle system operated at transonic exhaust speeds. The vanes deflected the fan stream relative to the core stream and resulted in reduced sideline noise for polar angles in the peak jet noise direction. Noise prediction models were developed for a range of vane configurations. The models interface with an existing ANOPP module and can be used or future system level studies.

Henderson, Brenda S.

2011-01-01

487

Stream ecology in an Alaskan tundra watershed  

SciTech Connect

This study was part of the R4D Project'', a large, multi- investigator study of an arctic watershed on the Alaskan North Slope. The ultimate goal of this program was to examine the response, resistance, and resilience to, and recovery from disturbances in arctic tundra ecosystems (hence, R4D). This report concerns the Steam Ecology portion of the R4D, project under the direction of Dr. Mark Oswood. Consideration of arctic streams is critical to rational management of the arctic landscape. Since streams drain upslope areas, disturbances visited upon valley slopes often have unwelcome consequences to the stream at the bottom of the valley. Degradation of water quality is generally not limited to a localized stretch of stream but transported some distance downstream and may involve changes in water quality or fish and wildlife populations in downstream rivers lakes, or estuaries. 14 refs.

Oswood, M.W.

1991-03-01

488

Optimizations in stream programming for multimedia applications  

E-print Network

Multimedia applications are the most dominant workload in desktop and mobile computing. Such applications regularly process continuous sequences of data and can be naturally represented under the stream programming domain ...

Wong, Eric, M. Eng. Massachusetts Institute of Technology

2012-01-01

489

The invariance hypothesis and the ventral stream  

E-print Network

The invariance hypothesis is the claim that properties of the ventral stream can be deduced from 1. a consideration of the computational problem with which it is engaged: invariant object recognition, 2. constraints of the ...

Leibo, Joel Zaidspiner

2014-01-01

490

One Video Stream to Serve Diverse Receivers  

E-print Network

The fundamental problem of wireless video multicast is to scalably serve multiple receivers which may have very different channel characteristics. Ideally, one would like to broadcast a single stream that allows each ...

Woo, Grace

2008-10-18

491

Water Stream "Loop-the-Loop"  

ERIC Educational Resources Information Center

Discusses the design of a modified loop-the-loop apparatus in which a water stream is used to illustrate centripetal forces and phenomena of high-velocity hydrodynamics. Included are some procedures of carrying out lecture demonstrations. (CC)

Jefimenko, Oleg

1974-01-01

492

Reactive solute transport in acidic streams  

USGS Publications Warehouse

Spatial and temporal profiles of Ph and concentrations of toxic metals in streams affected by acid mine drainage are the result of the interplay of physical and biogeochemical processes. This paper describes a reactive solute transport model that provides a physically and thermodynamically quantitative interpretation of these profiles. The model combines a transport module that includes advection-dispersion and transient storage with a geochemical speciation module based on MINTEQA2. Input to the model includes stream hydrologic properties derived from tracer-dilution experiments, headwater and lateral inflow concentrations analyzed in field samples, and a thermodynamic database. Simulations reproduced the general features of steady-state patterns of observed pH and concentrations of aluminum and sulfate in St. Kevin Gulch, an acid mine drainage stream near Leadville, Colorado. These patterns were altered temporarily by injection of sodium carbonate into the stream. A transient simulation reproduced the observed effects of the base injection.

Broshears, R.E.

1996-01-01

493

Directional detection of dark matter streams  

E-print Network

Directional detection of WIMPs, in which the energies and directions of the recoiling nuclei are measured, currently presents the only prospect for probing the local \\textit{velocity} distribution of Galactic dark matter. We investigate the extent to which future directional detectors would be capable of probing dark matter substructure in the form of streams. We analyse the signal expected from a Sagittarius-like stream and also explore the full parameter space of stream speed, direction, dispersion and density. Using a combination of non-parametric directional statistics, a profile likelihood ratio test and Bayesian parameter inference we find that within acceptable exposure times ($\\mathcal{O}(10)$ kg yr for cross sections just below the current exclusion limits) future directional detectors will be sensitive to a wide range of stream velocities and densities. We also examine and discuss the importance of the energy window of the detector.

O'Hare, Ciaran A J

2014-01-01

494

Online Spectral Clustering on Network Streams  

E-print Network

Graph is an extremely useful representation of a wide variety of practical systems in data analysis. Recently, with the fast accumulation of stream data from various type of networks, significant research interests have ...

Jia, Yi

2012-12-31

495

Dorsal stream : from algorithm to neuroscience  

E-print Network

The dorsal stream in the primate visual cortex is involved in the perception of motion and the recognition of actions. The two topics, motion processing in the brain, and action recognition in videos, have been developed ...

Jhuang, Hueihan

2011-01-01

496

A dynamically reconfigurable data stream processing system  

SciTech Connect

This paper describes a component-based framework for data stream processing that allows for configuration, tailoring, and runtime system reconfiguration. The system's architecture is based on a pipes and filters pattern, where data is passed through routes between components. A network of pipes and filters can be dynamically reconfigured in response to a preplanned sequence of processing steps, operator intervention, or a change in one or more data streams. This framework provides several mechanisms supporting dynamic reconfiguration and can be used to build static data stream processing applications such as monitoring or data acquisition systems, as well as self-adjusting systems that can adapt their processing algorithm, presentation layer, or data persistency layer in response to changes in input data streams.

Nogiec, J.M.; Trombly-Freytag, K.; /Fermilab

2004-11-01

497

That's Entertainment! Designing Streaming, Multimedia Web Experiences  

Microsoft Academic Search

This paper investigates the use of streaming multimedia narratives in web entertainment. Based on experience gained during the user centered design of a website for art and culture, we provide evidence that users want and like \\

Clare-marie Karat; John Karat; John Vergo; Claudio S. Pinhanez; Doug Riecken; Thomas Cofino

2002-01-01

498

New medium, new practice : civic production in live-streaming mobile video  

E-print Network

The ubiquity of camera phones, coupled with the increasing mobility of citizens and the rise of digital production as an embedded technosocial practice, is creating incentives for many people around the globe to engage in ...

Dougherty, Audubon McKeown

2010-01-01

499

Exploring Large-Scale Peer-to-Peer Live Streaming Topologies  

E-print Network

of reciprocity, a clustering phenomenon in each ISP, and a degree distribution that does not follow the power-law, and reciprocity. In addition, we compare our findings with results from existing studies on topological properties

Li, Baochun

500

Quantitative genetic parameters for wild stream-living brown trout: heritability and parental effects  

E-print Network

trout (Salmo trutta), based on long-term mark-recapture data and pedigree reconstruction based on large effects D. SERBEZOV*, L. BERNATCHEZ , E. M. OLSEN*à & L. A. V?LLESTAD* *Centre for Ecological-mail: avollest@bio.uio.no ª 2 0 1 0 T H E A U T H O R S . J . E V O L . B I O L . 2 3 ( 2 0 1 0 ) 1 6 3 1 ­ 1 6 4

Bernatchez, Louis