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1

In Search of an API for Scalable File Systems: Under the Table or Above it.  

National Technical Information Service (NTIS)

Cluster file systems have been used by the high performance computing (HPC) community at even larger scales for more than a decade. These cluster file systems, including IBM GPFS, Panasas PanFS, PVFS and Lustre, are required to meet the scalability demand...

G. A. Gibson G. R. Ganger J. Lopez M. Polte S. Patil

2009-01-01

2

IRON file systems  

Microsoft Academic Search

Commodity file systems trust disks to either work or fail completely, yet modern disks exhibit more complex failure modes. We suggest a new file system, Linux ixt3, showing that techniques such as in-disk checksumming, replication, and parity greatly enhance file system robustness while incurring minimal time and space overheads.

Vijayan Prabhakaran; Lakshmi N. Bairavasundaram; Nitin Agrawal; Haryadi S. Gunawi; Andrea C. Arpaci-Dusseau; Remzi H. Arpaci-Dusseau

2005-01-01

3

The Google file system  

Microsoft Academic Search

We have designed and implemented the Google File Sys- tem, a scalable distributed file system for large distributed data-intensive applications. It provides fault tolerance while running on inexpensive commodity hardware, and it delivers high aggregate performance to a large number of clients. While sharing many of the same goals as previous dis- tributed file systems, our design has been driven

Sanjay Ghemawat; Howard Gobioff; Shun-Tak Leung

2003-01-01

4

Network file-storage system  

Microsoft Academic Search

The Central File System (CFS) is a file management and file storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices; larger, less active files are stored on slower, less expensive devices; and archival files are stored offline. Files are automatically moved between

M. W. Collins; M. J. Devaney; E. W. Willbanks

1983-01-01

5

A Network File Storage System  

Microsoft Academic Search

The Common File System (CFS) is a file management and mass storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices, larger, less active files are stored on slower, less expensive devices, and archival files are stored offline. Files are automatically moved between

William Collins; Marjorie Devaney; Emily Willbanks

1982-01-01

6

Network file storage system  

Microsoft Academic Search

The Common File System (CFS) is a large, online centralized storage system for the Los Alamos National Laboratory's computer network. The CFS provides Los Alamos computer users a relatively simple set of primitives with which they can store and retrieve files. A tree-structured directory allows the users to organize their data in a logical and reasonable manner. Eighteen months of

R. D. Christman; M. W. Collins; M. A. Devaney; E. W. Willbanks

1981-01-01

7

IRON file systems  

Microsoft Academic Search

Commodity file systems trust disks to either work or fail completely, yet modern disks exhibit more complex failure modes. We suggest a new fail-partial failure model for disks, which incorporates realistic localized faults such as latent sector errors and block corruption. We then develop and apply a novel failure-policy fingerprinting framework, to investigate how commodity file systems react to a

Vijayan Prabhakaran; Lakshmi N. Bairavasundaram; Nitin Agrawal; Haryadi S. Gunawi; Andrea C. Arpaci-Dusseau; Remzi H. Arpaci-Dusseau

2005-01-01

8

Network file-storage system  

SciTech Connect

The Central File System (CFS) is a file management and file storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices; larger, less active files are stored on slower, less expensive devices; and archival files are stored offline. Files are automatically moved between the various classes of storage by a file migration program that analyzes file activity, file size and storage device capabilties. This has resulted in a cost-effective system that provides both fast access and large data storage capability.

Collins, M.W.; Devaney, M.J.; Willbanks, E.W.

1983-01-01

9

Secure Distributed File Systems.  

National Technical Information Service (NTIS)

Secure information distribution is a strategic capability as significant as weapons systems and tactics to military operations. The Department of Defense has recognized the importance of establishing and maintaining secure distributed file systems and exp...

T. M. Conroy W. H. Buxton

1994-01-01

10

Network file storage system  

SciTech Connect

The Common File System (CFS) is a large, online centralized storage system for the Los Alamos National Laboratory's computer network. The CFS provides Los Alamos computer users a relatively simple set of primitives with which they can store and retrieve files. A tree-structured directory allows the users to organize their data in a logical and reasonable manner. Eighteen months of operational experience and statistics have provided considerable insight into the best methods of providing optimum service and response to CFS users. Automatically moving, or migrating, files between storage devices based on usage characteristics has provided a cost-effective storage system.

Christman, R.D.; Collins, M.W.; Devaney, M.A.; Willbanks, E.W.

1981-07-01

11

Network file-storage system  

SciTech Connect

The Common File System (CFS) is a file management and mass storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices, larger, less active files are stored on slower, less expensive devices, and archival files are stored offline. Files are automatically moved between the various classes of storage by a file migration program that analyzes file activity, file size and storage device capabilities. This has resulted in a cost-effective system that provides both fast access and large data storage capability (over five trillion bits currently stored).

Collins, W.W.; Devaney, M.J.; Willbanks, E.W.

1982-01-01

12

Design and Implementation of a Consistent Update Method for Multiple File Replicas in a Distributed File System  

Microsoft Academic Search

The need for saving a great many files becomes necessary in distributed file system environment. Particularly, some file systems maintain multiple file replicas for efficient failure recovery. Under these circumstances, however, all the file replicas have to be modified identically to update a file. If there are many clients to update the same file concurrently, the final images of all

Myung-Hoon Cha; Sang-Min Lee; Ki-Sung Jin; Young-Soo Min; Young-Kyun Kim

2008-01-01

13

Network File-Storage System.  

National Technical Information Service (NTIS)

The Central File System (CFS) is a file management and file storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices; larger, le...

M. W. Collins M. J. Devaney E. W. Willbanks

1983-01-01

14

Common File System Specifications.  

National Technical Information Service (NTIS)

The Common File System (CFS) is a mass storage system for the Los Alamos Scientific Laboratory's Integrated Computer Network. The function of the CFS is to allow users of computers in the network to store and retrieve large amounts of data. The CFS will h...

P. M. Blood R. D. Christman M. W. Collins E. W. Willbanks

1977-01-01

15

Network File Storage System.  

National Technical Information Service (NTIS)

The Common File System (CFS) is a large, online centralized storage system for the Los Alamos National Laboratory's computer network. The CFS provides Los Alamos computer users a relatively simple set of primitives with which they can store and retrieve f...

R. D. Christman M. W. Collins M. A. Devaney E. W. Willbanks

1981-01-01

16

Common File System specifications  

Microsoft Academic Search

The Common File System (CFS) is a mass storage system for the Los Alamos Scientific Laboratory's Integrated Computer Network. The function of the CFS is to allow users of computers in the network to store and retrieve large amounts of data. The CFS will have an on-line storage capacity of more than a trillion bits and an archival storage capacity

P. M. Blood; R. D. Christman; M. W. Collins; E. W. Willbanks

1977-01-01

17

Generating Realistic Impressions for File-System Benchmarking  

Microsoft Academic Search

The performance of file systems and related software de- pends on characteristics of the underlying file-system im- age (i.e., file-system metadata and file contents). Un- fortunately, rather than benchmarking with realistic file- system images, most system designers and evaluators rely on ad hoc assumptions and (often inaccurate) rules of thumb. Furthermore, the lack of standardization and reproducibility makes file system

Nitin Agrawal; Andrea C. Arpaci-dusseau; Remzi H. Arpaci-dusseau

2009-01-01

18

Network File-Storage System.  

National Technical Information Service (NTIS)

The Common File System (CFS) is a file management and mass storage system for the Los Alamos National Laboratory's computer network. The CFS is organized as a hierarchical storage system: active files are stored on fast-access storage devices, larger, les...

W. W. Collins M. J. Devaney E. W. Willbanks

1982-01-01

19

Very High-Speed Report File System.  

National Technical Information Service (NTIS)

The Minnesota Supercomputer Center, Inc. (MSCI), under its Very High-Speed Remote File System (VHSRFS) contract with the Army Research Office, conducted research in: Technologies for integrating TCP/EP protocols with ATM networks; Technologies which will ...

T. J. Salo J. D. Cavanaugh M. K. Spengler

1992-01-01

20

The Echo Distributed File System  

Microsoft Academic Search

Echo is an ambitious distributed file system. It was designed around a truly global name space. It uses a coherent caching algorithm. It is fault tolerant. And it is real, it was the primary file system for a large group of researchers. Its novel aspects include an extensible \\

Andrew D. Birrell; Andy Hisgen; Chuck Jerian; Timothy Mann; Garret Swart

21

Replication in the Harp File System.  

National Technical Information Service (NTIS)

This paper describes the design and implementation of the Harp (Highly Available Reliable Persistent) file system. Harp is a replicated Unix file system accessible via the VFS (Virtual File System) interface. It provides highly available and reliable stor...

B. Liskov L. Shrira P. Johnson R. Gruber S. Ghemawat

1981-01-01

22

FileWall: A Firewall for Network File Systems  

Microsoft Academic Search

Access control in network file systems relies on primitive mechanisms like access control lists and permission bits, which are not enough when operating in a hostile network environment. Network middleboxes, e.g., firewalls, completely ignore file system semantics when defining policies. Therefore, implementing simple context-aware access policies requires modifications to file servers and\\/or clients, which is impractical. We present FileWall, a

Stephen Smaldone; Aniruddha Bohra; Liviu Iftode

2007-01-01

23

DRUG MASTER FILES UNDER GDUFA: DMF Basics  

Center for Drug Evaluation (CDER)

Text Version... Application • 314.420 Drug Master Files Page 5. ... DMF will be finished during the filing window of the ANDA. ... been filed (file and pay) 2 ... More results from www.fda.gov/downloads/drugs/developmentapprovalprocess

24

A File System for Information Management  

Microsoft Academic Search

Nebula is a file system that explicitly supports informationmanagement. It differs from traditional systems in threeimportant ways. First, Nebula implements files as sets of attributes.Each attribute describes some property of the filesuch as owner, protection, functions defined, sections specified,project, or file type. The content of the file is representedby a special text attribute. Second, Nebula supportsassociative access of files within

A Dharap; Bill Camargo; C. Mic Bowman; Mrinal Baruah; Sunil Potti

1994-01-01

25

The Zebra striped network file system  

Microsoft Academic Search

Zebra is a network file system that increases throughput by striping file data across multiple servers. Rather than striping each file separately, Zebra forms all the new data from each client into a single stream, which it then stripes using an approach similar to a log-structured file system. This provides high performance for writes of small files as well as

John H. Hartman; John K. Ousterhout

1993-01-01

26

A Meta-Data Enhanced File System  

Microsoft Academic Search

Research has been done to enhance traditional file systems with database-like capabilities. Existing solutions store additional meta-data, describing files' contents and interrelationships, but provide access to the new file system's capabilities only through a specialized interface. Most of them don't support user-defined relationships among files, and if they do, this is not true for file categories. We designed a file

A. Colesa; V. Cionca; A. Tata; I. Ignat

2007-01-01

27

Tuning HDF5 for Lustre File Systems  

SciTech Connect

HDF5 is a cross-platform parallel I/O library that is used by a wide variety of HPC applications for the flexibility of its hierarchical object-database representation of scientific data. We describe our recent work to optimize the performance of the HDF5 and MPI-IO libraries for the Lustre parallel file system. We selected three different HPC applications to represent the diverse range of I/O requirements, and measured their performance on three different systems to demonstrate the robustness of our optimizations across different file system configurations and to validate our optimization strategy. We demonstrate that the combined optimizations improve HDF5 parallel I/O performance by up to 33 times in some cases running close to the achievable peak performance of the underlying file system and demonstrate scalable performance up to 40,960-way concurrency.

Howison, Mark; Koziol, Quincey; Knaak, David; Mainzer, John; Shalf, John

2010-09-24

28

Replication in the Harp File System  

Microsoft Academic Search

This paper describes the design and implementation of the Harp file system. Harp is a replicated Unix file system accessible via the VFS interface. It provides highly available and reliable storage for files and guarantees that file operations are executed atomically in spite of concurrency and failures. It uses a novel variation of the primary copy replication technique that provides

Barbara Liskov; Sanjay Ghemawat; Robert Gruber; Paul Johnson; Liuba Shrira; Michael Williams

1991-01-01

29

Measurements of a Distributed File System  

Microsoft Academic Search

We analyzed the user-level file access patterns and caching behavior of the Sprite distributed file system. The first part of our analysis repeated a study done in 1985 of the: BSD UNIX file system. We found that file throughput has increased by a factor of 20 to an average of 8 Kbytes per second per active user over 10-minute intervals,

Mary G. Baker; John H. Hartman; Michael D. Kupfer; Ken W. Shirriff; John K. Ousterhout

1991-01-01

30

The Future of the Andrew File System  

ScienceCinema

The talk will discuss the ten operational capabilities that have made AFS unique in the distributed file system space and how these capabilities are being expanded upon to meet the needs of the 21st century. Derrick Brashear and Jeffrey Altman will present a technical road map of new features and technical innovations that are under development by the OpenAFS community and Your File System, Inc. funded by a U.S. Department of Energy Small Business Innovative Research grant. The talk will end with a comparison of AFS to its modern days competitors.

31

On Verifying a File System Implementation  

Microsoft Academic Search

\\u000aWe present a correctness proof for a basic file system\\u000aimplementation. This implementation contains key elements of standard\\u000aUnix file systems such as inodes and fixed-size disk blocks. We prove\\u000athe implementation correct by establishing a simulation relation\\u000abetween the specification of the file system (which models the file\\u000asystem as an abstract map from file names to sequences of

Konstantine Arkoudas; Karen Zee; Viktor Kuncak; Martin C. Rinard

2004-01-01

32

A Stackable File System Interface For Linux  

Microsoft Academic Search

Linux is a popular operating system that is rapidly evolv- ing due to being Open Source and having many developers. The Linux kernel comes with more than two dozen file sys- tems, all of which are native: they access device drivers di- rectly. Native file systems are harder to develop. Stackable file systems, however, are easier to develop because they

Erez Zadok; Ion Badulescu

1999-01-01

33

Metadata Update Performance in File Systems  

Microsoft Academic Search

Structural changes, such as file creation and block al- location, have consistently been identified as file system performance problems in many user environments. We compare several implementations that maintain metadata integrity in the event of a system failure but do not require changes to the on-disk structures. In one set of schemes, the file system uses asynchronous writes and passes

Gregory R. Ganger; Yale N. Patt

1994-01-01

34

Caching in the Sprite network file system  

Microsoft Academic Search

The Sprite network operating system uses large main-memory disk block caches to achieve high performance in its file system. It provides non-write-through file caching on both client and server machines. A simple cache consistency mechanism permits files to be shared by multiple clients without danger of stale data. In order to allow the file cache to occupy as much memory

Michael N. Nelson; Brent B. Welch; John K. Ousterhout

1988-01-01

35

A Metadata-Rich File System  

SciTech Connect

Despite continual improvements in the performance and reliability of large scale file systems, the management of file system metadata has changed little in the past decade. The mismatch between the size and complexity of large scale data stores and their ability to organize and query their metadata has led to a de facto standard in which raw data is stored in traditional file systems, while related, application-specific metadata is stored in relational databases. This separation of data and metadata requires considerable effort to maintain consistency and can result in complex, slow, and inflexible system operation. To address these problems, we have developed the Quasar File System (QFS), a metadata-rich file system in which files, metadata, and file relationships are all first class objects. In contrast to hierarchical file systems and relational databases, QFS defines a graph data model composed of files and their relationships. QFS includes Quasar, an XPATH-extended query language for searching the file system. Results from our QFS prototype show the effectiveness of this approach. Compared to the defacto standard, the QFS prototype shows superior ingest performance and comparable query performance on user metadata-intensive operations and superior performance on normal file metadata operations.

Ames, S; Gokhale, M B; Maltzahn, C

2009-01-07

36

The Modify-on-Access File System  

Microsoft Academic Search

This paper presents the Modify-on-Access (MonA) file system, an active file system,that cooperates with processes to accomplish tasks. The MonA file system optimizescritical read and write paths, while simplifying system software and application programs.MonA provides a framework for dynamically pushing and popping modulartransformations onto data streams during accesses. We demonstrate that the MonAfile system adds considerable functionality for minimal overhead,

Richard Kendall; Vincent W. Freeh

1998-01-01

37

Performance of the IBM General Parallel File System.  

National Technical Information Service (NTIS)

Experimental performance analysis is a necessary first step in input/output software tuning and real-time environment code performance prediction. We measure the performance and scalability of IBMs General Parallel File System (GPFS) under a variety of co...

T. Jones A. Koniges R. K. Yates

1999-01-01

38

A Survey of Distributed File Systems  

Microsoft Academic Search

Abstract This paper is a survey of the current state of the art in the design and implementation of distributed file systems. It consists of four major parts: an overview of background material, case studies of a number of contemporary file systems, identification of key design techniques, and an examination of current research issues. The systems surveyed are Sun NFS,

M. Satyanarayanan

1989-01-01

39

A FlashMemory Based File System  

Microsoft Academic Search

A flash memory device driver that supports a conventional UNIX file system transparently was designed. To avoid the limitations due to flash memory's restricted number of write cycles and its inability to be overwritten, this driver writes data to the flash memory system sequentially as a Log-structured File System (LFS) does and uses a cleaner to collect valid data blocks

Atsuo Kawaguchi; Shingo Nishioka; Hiroshi Motoda

1995-01-01

40

Hadoop distributed file system for the Grid  

Microsoft Academic Search

Data distribution, storage and access are essential to CPU-intensive and data-intensive high performance Grid computing. A newly emerged file system, Hadoop distributed file system (HDFS), is deployed and tested within the Open Science Grid (OSG) middleware stack. Efforts have been taken to integrate HDFS with other Grid tools to build a complete service framework for the Storage Element (SE). Scalability

G. Attebury; A. Baranovski; K. Bloom; B. Bockelman; D. Kcira; J. Letts; T. Levshina; C. Lundestedt; T. Martin; W. Maier; Haifeng Pi; A. Rana; I. Sfiligoi; A. Sim; M. Thomas; F. Wuerthwein

2009-01-01

41

Clockwise: A Mixed-Media File System  

Microsoft Academic Search

This (short) paper presents the Clockwise, a mixed- media file system. The primary goal of the Clockwise is to provide a storage architecture that supports the storage and retrieval of best-effort and real-time file system data. Clockwise provides an abstraction called a dynamic par- tition that groups lists of related (large) blocks on one or more disks. Dynamic partition can

Peter Bosch; Sape J. Mullender; Pierre G. Jansen

1999-01-01

42

A fast file system for UNIX  

Microsoft Academic Search

A reimplementation of the UNIX file system is described. The reimplementation provides substantially higher throughput rates by using more flexible allocation policies that allow better locality of reference and can be adapted to a wide range of peripheral and processor characteristics. The new file system clusters data that is sequentially accessed and provides two block sizes to allow fast access

Marshall K. McKusick; William N. Joy; Samuel J. Leffler; Robert S. Fabry

1984-01-01

43

Postmark: a new file system benchmark  

Microsoft Academic Search

Existing file system benchmarks are deficient in portraying performance in the ephemeral small-file regime used by Internet software, especially: electronicmail; netnews; and web-based commerce. PostMark is a new benchmark to measure performance for this class of application.In this paper, PostMark test results are presented and analyzed for both UNIX and Windows NT application servers. Network Appliance Filers (file server appliances)

J. Katcher

1997-01-01

44

17 CFR 240.12b-36 - Use of financial statements filed under other acts.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Use of financial statements filed under other acts...240.12b-36 Use of financial statements filed under other acts. Where copies of certified financial statements filed under other acts...

2013-04-01

45

A Low-Bandwidth Network File System  

Microsoft Academic Search

Users rarely consider running network file systems over slow or wide-area networks, as the performance would be unacceptable and the bandwidth consumption too high. Nonetheless, efficient remote file access would often be desirable over such networks---particularly when high latency makes remote login sessions unresponsive. Rather than run interactive programs such as editors remotely, users could run the programs locally and

Athicha Muthitacharoen; Benjie Chen; David Mazières

2001-01-01

46

hFS: a hybrid file system prototype for improving small file and metadata performance  

Microsoft Academic Search

Two oft-cited file systems, the Fast File System (FFS) and the Log-Structured File System (LFS), adopt two sharply different update strategies—update-in-place and update-out-of-place. This paper introduces the design and implementation of a hybrid file system called hFS, which combines the strengths of FFS and LFS while avoiding their weaknesses. This is accomplished by distributing file system data into two partitions

Zhihui Zhang; Kanad Ghose

2007-01-01

47

hFS: a hybrid file system prototype for improving small file and metadata performance  

Microsoft Academic Search

Two oft-cited file systems, the Fast File System (FFS) and the Log-Structured File System (LFS), adopt two sharply different update strategies---update-in-place and update-out-of-place. This paper introduces the design and implementation of a hybrid file system called hFS, which combines the strengths of FFS and LFS while avoiding their weaknesses. This is accomplished by distributing file system data into two partitions

Zhihui Zhang; Kanad Ghose

2007-01-01

48

A RDF Description of Distributed File Systems  

Microsoft Academic Search

The modern operating systems must integrate various Internet services, especially World-Wide Web facilities to access Web resources using file systems mechanisms. In this paper we present a high-level model describing an abstract distributed file system. The proposed description is based on Resource Description Framework (RDF) recommendation of the World-Wide Web Consortium, a standardized foundation for processing metadata. To represent the

Sabin C. Buraga

2000-01-01

49

A five-year study of file-system metadata  

Microsoft Academic Search

For five years, we collected annual snapshots of file- system metadata from over 60,000 Windows PC file sys- tems in a large corporation. In this paper, we use these snapshots to study temporal changes in file size, file age, file-type frequency, directory size, namespace structure, file-system population, storage capacity and consump- tion, and degree of file modification. We present a

Nitin Agrawal; William J. Bolosky; John R. Douceur; Jacob R. Lorch

2007-01-01

50

Deciding when to forget in the Elephant file system  

Microsoft Academic Search

Modern file systems associate the deletion of a file with the immediate release of storage, and file writes with the irrevocable change of file contents. We argue that this behavior is a relic of the past, when disk storage was a scarce resource. Today, large cheap disks make it possible for the file system to protect valuable data from accidental

Douglas S. Santry; Michael J. Feeley; Norman C. Hutchinson; Alistair C. Veitch; Ross W. Carton; Jacob Ofir

1999-01-01

51

UBC DISTRIBUTED CONTINUOUS MEDIA FILE SYSTEM  

Microsoft Academic Search

Abstract This report describes the internal design of the UBC Distributed Continuous Media File Server as of April 1995. The most significant unique characteristic of this system is its approach,to admission control which,utilizes the time-varying requirements,of the variable bit-rate data streams currently admitted into the system to properly allocate disk resources. The structure of the processes which implement,the file server

Dwight J. Makaroff; Norman C. Hutchinson; Gerald W. Neufeld

52

Design and Implementation of Ceph: A Scalable Distributed File System  

SciTech Connect

File system designers continue to look to new architectures to improve scalability. Object-based storage diverges from server-based (e.g. NFS) and SAN-based storage systems by coupling processors and memory with disk drives, delegating low-level allocation to object storage devices (OSDs) and decoupling I/O (read/write) from metadata (file open/close) operations. Even recent object-based systems inherit decades-old architectural choices going back to early UNIX file systems, however, limiting their ability to effectively scale to hundreds of petabytes. We present Ceph, a distributed file system that provides excellent performance and reliability with unprecedented scalability. Ceph maximizes the separation between data and metadata management by replacing allocation tables with a pseudo-random data distribution function (CRUSH) designed for heterogeneous and dynamic clusters of unreliable OSDs. We leverage OSD intelligence to distribute data replication, failure detection and recovery with semi-autonomous OSDs running a specialized local object storage file system (EBOFS). Finally, Ceph is built around a dynamic distributed metadata management cluster that provides extremely efficient metadata management that seamlessly adapts to a wide range of general purpose and scientific computing file system workloads. We present performance measurements under a variety of workloads that show superior I/O performance and scalable metadata management (more than a quarter million metadata ops/sec).

Weil, S A; Brandt, S A; Miller, E L; Long, D E; Maltzahn, C

2006-04-19

53

A file system for continuous media  

Microsoft Academic Search

The Continuous Media File System, CMFS, supports real-time storage and retrieval of continuous media data (digital audio and video) on disk. CMFS clients read or write files in “sessions,” each with a guaranteed minimum data rate. Multiple sessions, perhaps with different rates, and non-real-time access can proceed concurrently. CMFS addresses several interrelated design issues; real-time semantics fo sessions, disk layout,

David P. Anderson; Yoshitomo Osawa; Ramesh Govindan

1992-01-01

54

Secure file system versioning at the block level  

Microsoft Academic Search

In typical file systems, valuable data is vulnerable to being accidentally or maliciously deleted or overwritten. Versioning file systems protect data from accidents by transparently retaining old versions, but do less well in protecting data from malicious attack. These systems remain vulnerable to attackers who gain unauthorized access to prune old file versions, who bypass the file system to directly

Jake Wires; Michael J. Feeley

2007-01-01

55

Secure file system versioning at the block level  

Microsoft Academic Search

In typical file systems, valuable data is vulnerable to being accidentally or maliciously deleted or overwritten. Version- ing file systems protect data from accidents by transparently retaining old versions, but do less well in protecting data from malicious attack. These systems remain vulnerable to attackers who gain unauthorized access to prune old file versions, who bypass the file system to

Jake Wires; Michael J. Feeley

2007-01-01

56

Are Your Computer Files Protected Under the Fourth Amendment?  

Microsoft Academic Search

Currently, the government(s) in the United States can seize a copy of a hard drive of a computer and not violate the Fourth Amendment. This paper examines this situation and looks at ways to protect private computer files under the Fourth Amendment. This paper analyzes the historical context of the Fourth Amendment and its affinity toward tangible private property. Physical

Marianne Hoebich

2008-01-01

57

Graffiti: A Framework for Testing Collaborative Distributed File System  

Microsoft Academic Search

Managing storage in the face of relentless growth in the number and va- riety of files on storage systems creates demand for rich file s ystem meta- data as is made evident by the recent emergence of rich metadata support in many applications as well as file systems. Yet, little suppor t exists for shar- ing metadata across file systems

C. MALTZAHN; N. BOBB; M. W. STORER; D. EADS; S. A. BRANDT; E. L. MILLER

58

Modeling Peer-Peer File Sharing Systems  

Microsoft Academic Search

Peer-peer networking has recently emerged as a new paradigm for building distributed networked applications. In this paper we develop simple mathematical models to explore and illustrate fundamental performance issues of peer-peer file sharing systems. The modeling framework introduced and the corresponding solution method are flexible enough to accom- modate different characteristics of such systems. Through the specification of model parameters,

Zihui Ge; Daniel R. Figueiredo; Sharad Jaiswal; James F. Kurose; Donald F. Towsley

2003-01-01

59

OrcFS: Organized Relationships between Components of the File System for Efficient File Retrieval  

Microsoft Academic Search

The need for efficient organization of files grows with the computer storage capabilities. However, a classical hierarchical file system offers little help in this matter, excepting maybe the case of links and shortcuts. OrcFS proposes a solution to this problem. By redefining several file system concepts, it allows the user to set custom metadata, in the form of property-value pairs,

Alexandra Coldea; Adrian Colesa; Iosif Ignat

2010-01-01

60

Public Document Room file classification system  

SciTech Connect

This listing contains detailed descriptions of the file classification system for documents available from the Public Document Room (PDR) of the US Nuclear Regulatory Commission. As a public service branch of the agency, the PDR maintains facilities for receiving, processing, storing, and retrieving documents which NRC generates or receives in performing its regulatory function. Unlike a library, the PDR does not maintain collections of formally published materials, such as books, monographs, serials, periodicals, or general indexes. The documents on file at the PDR can be reports, written records of meetings (transcripts), existing or proposed regulations, the text of licenses or their amendments, and correspondence.

Not Available

1982-06-01

61

File System Support for Delta Compression  

Microsoft Academic Search

Delta compression, which consists of compactly encoding one file version as the result of changes to an- other, can improve efficiency in the use of network and disk resources. Delta compression techniques are readily available and can result in compression factors of five to ten on typical data, however managing delta-compressed storage is difficult. I present a system that attempts

Joshua P. MacDonald

2000-01-01

62

Ivy: a read\\/write peer-to-peer file system  

Microsoft Academic Search

Ivy is a multi-user read\\/write peer-to-peer file system. Ivy has no centralized or dedicated components, and it provides useful integrity properties without requiring users to fully trust either the underlying peer-to-peer-storage system or the other users of the file system.An Ivy file system consists solely of a set of logs, one log per participant. Ivy stores its logs in the

Athicha Muthitacharoen; Robert Morris; Thomer M. Gil; Benjie Chen

2002-01-01

63

Keypad: an auditing file system for theft-prone devices  

Microsoft Academic Search

This paper presents Keypad, an auditing file system for theft-prone devices, such as laptops and USB sticks. Keypad provides two important properties. First, Keypad supports fine-grained file auditing: a user can obtain explicit evidence that no files have been accessed after a device's loss. Second, a user can disable future file access after a device's loss, even in the absence

Roxana Geambasu; John P. John; Steven D. Gribble; Tadayoshi Kohno; Henry M. Levy

2011-01-01

64

FSprof: An In-Kernel File System Operations Profiler  

Microsoft Academic Search

Developing efficient file systems is difficult. Often, profiling tools are useful for analyzing system bottlenecks and correcting them. Whereas there are several techniques to profile system call activ- ity or disk-block activity, there are no good tools to profile file systems—which logically reside below system calls and above disk drivers. We developed a tool called FSprof that instruments existing file

Nikolai Joukov; Charles P. Wright; Erez Zadok

65

Collective operations in a file system based execution model  

DOEpatents

A mechanism is provided for group communications using a MULTI-PIPE synthetic file system. A master application creates a multi-pipe synthetic file in the MULTI-PIPE synthetic file system, the master application indicating a multi-pipe operation to be performed. The master application then writes a header-control block of the multi-pipe synthetic file specifying at least one of a multi-pipe synthetic file system name, a message type, a message size, a specific destination, or a specification of the multi-pipe operation. Any other application participating in the group communications then opens the same multi-pipe synthetic file. A MULTI-PIPE file system module then implements the multi-pipe operation as identified by the master application. The master application and the other applications then either read or write operation messages to the multi-pipe synthetic file and the MULTI-PIPE synthetic file system module performs appropriate actions.

Shinde, Pravin; Van Hensbergen, Eric

2013-02-12

66

Collective operations in a file system based execution model  

DOEpatents

A mechanism is provided for group communications using a MULTI-PIPE synthetic file system. A master application creates a multi-pipe synthetic file in the MULTI-PIPE synthetic file system, the master application indicating a multi-pipe operation to be performed. The master application then writes a header-control block of the multi-pipe synthetic file specifying at least one of a multi-pipe synthetic file system name, a message type, a message size, a specific destination, or a specification of the multi-pipe operation. Any other application participating in the group communications then opens the same multi-pipe synthetic file. A MULTI-PIPE file system module then implements the multi-pipe operation as identified by the master application. The master application and the other applications then either read or write operation messages to the multi-pipe synthetic file and the MULTI-PIPE synthetic file system module performs appropriate actions.

Shinde, Pravin; Van Hensbergen, Eric

2013-02-19

67

What we know about offenders who drive under the influence: Analysis of court case file reviews  

Microsoft Academic Search

This paper presents findings from a quantitative study about alcohol-impaired drivers in Utah. The University of Utah's Social Research Institute conducted a retrospective case file evaluation about the adjudication and sanctioning phases associated with driving under the influence (DUI) to determine Utah's response to DUI crime from arrest forward. Although Utah driver's license and court systems are on the cutting

Caren J Frost; Mary E Phillips; Derrik Tollefson; Joslin Werstak

2006-01-01

68

MRAMFS: A Compressing File System for Non-Volatile RAM  

Microsoft Academic Search

File systems using non-volatile RAM (NVRAM) promise great improvements in file system performance over con- ventional disk storage. However, current technology allow s for a relatively small amount of NVRAM, limiting the effec- tiveness of such an approach. We have developed a proto- type in-memory file system which utilizes data compression on inodes, and which has preliminary support for compres-

Nathan K. Edel; Deepa Tuteja; Ethan L. Miller; Scott A. Brandt

2004-01-01

69

A History of the Andrew File System  

ScienceCinema

Derrick Brashear and Jeffrey Altman will present a technical history of the evolution of Andrew File System starting with the early days of the Andrew Project at Carnegie Mellon through the commercialization by Transarc Corporation and IBM and a decade of OpenAFS. The talk will be technical with a focus on the various decisions and implementation trade-offs that were made over the course of AFS versions 1 through 4, the development of the Distributed Computing Environment Distributed File System (DCE DFS), and the course of the OpenAFS development community. The speakers will also discuss the various AFS branches developed at the University of Michigan, Massachusetts Institute of Technology and Carnegie Mellon University.

70

Software engineering applications of logic file system: application to automated multi-criteria indexation of software components  

Microsoft Academic Search

Logic information systems use formal concept analysis in a novel way to manage information. A file system implementation has been designed under the name of Logic file system. It offers a flexible management of non-hierarchical data. We present several applications of Logic file system to software engineering: multi-criteria indexation of software components, multi-concern browsing of source files, and bug finding

Benjamin Sigonneau; Olivier Ridoux

2006-01-01

71

Mapping Objects to Files: A UNIX File System Interface to an Object Management System.  

National Technical Information Service (NTIS)

The design of a UNIX file system interface for the Camera Object Management System (OMS), an extensible, fully object oriented environment comparable to Smalltalk, is described. The interface was developed to let the UNIX system act as a user interface to...

G. Florijn L. Soepenberg A. Dijkstra

1993-01-01

72

The Effects of Memory-Rich Environments on File System Microbenchmarks  

Microsoft Academic Search

File system performance has been greatly influenced by disk caching mechanisms. As the size of memory increases, common workloads are more likely to run completely from memory, and the effects of L2 caching and underlying hardware are becoming more visible. This paper investigates performance anomalies observed when measuring and comparing the memory performance of various leading file systems. We discovered

An-I A. Wang; Geoffrey Kuenning; Peter Reiher; Gerald J. Popek

2003-01-01

73

Design and Implementation of a Metadata-rich File System  

SciTech Connect

Despite continual improvements in the performance and reliability of large scale file systems, the management of user-defined file system metadata has changed little in the past decade. The mismatch between the size and complexity of large scale data stores and their ability to organize and query their metadata has led to a de facto standard in which raw data is stored in traditional file systems, while related, application-specific metadata is stored in relational databases. This separation of data and semantic metadata requires considerable effort to maintain consistency and can result in complex, slow, and inflexible system operation. To address these problems, we have developed the Quasar File System (QFS), a metadata-rich file system in which files, user-defined attributes, and file relationships are all first class objects. In contrast to hierarchical file systems and relational databases, QFS defines a graph data model composed of files and their relationships. QFS incorporates Quasar, an XPATH-extended query language for searching the file system. Results from our QFS prototype show the effectiveness of this approach. Compared to the de facto standard, the QFS prototype shows superior ingest performance and comparable query performance on user metadata-intensive operations and superior performance on normal file metadata operations.

Ames, S; Gokhale, M B; Maltzahn, C

2010-01-19

74

Keypad: An Auditing File System for Theft-Prone Devices  

Microsoft Academic Search

This paper presents Keypad, an auditingfile system for theft- prone devices, such as laptops and USB sticks. Keypad pro- vides two important properties. First, Keypad supports fine- grained file auditing: a user can obtain explicit evidence that no files have been accessed after a device's loss. Second, a user can disable future file access after a device's loss, even in

Roxana Geambasu; John P. John; Steven D. Gribble; Tadayoshi Kohno; Henry M. Levy

2011-01-01

75

Richer File System Metadata Using Links and Attributes  

Microsoft Academic Search

Traditional file systems provide a weak and inadequate structure for meaningful representations of file interrela- tionships and other context-providing metadata. Existing designs, which store additional file-oriented metadata ei- ther in a database, on disk, or both are limited by the technologies upon which they depend. Moreover, they do not provide for user-defined relationships among files. To address these issues, we

Alexander Ames; Carlos Maltzahn; Nikhil Bobb; Ethan L. Miller; Scott A. Brandt; Alisa Neeman; Adam Hiatt; Deepa Tuteja

2005-01-01

76

RAMA: A file system for massively parallel computers  

SciTech Connect

This paper describes a file system design for massively parallel computers which makes very efficient use of a few disks per processor. This overcomes the traditional I/O bottleneck of massively parallel machines by storing the data on disks within the high-speed interconnection network. In addition, the file system, called RAMA, requires little inter-node synchronization, removing another common bottleneck in parallel processor file systems. Support for a large tertiary storage system can easily be integrated in lo the file system; in fact, RAMA runs most efficiently when tertiary storage is used.

Miller, E.L.; Katz, R.H.

1993-01-01

77

Reimplementing the Cedar File System Using Logging and Group Commit  

Microsoft Academic Search

The workstation file system for the Cedar programming environment was modified to improve its robustness and performance. Previously, the file system used hardware-provided labels on disk blocks to increase robustness against hardware and software errors. The new system does not require hardware disk labels, yet is more robust than the old system. Recovery is rapid after a crash. The performance

Robert B. Hagmann

1987-01-01

78

Streaming extensibility in the Modify-on-Access file system  

Microsoft Academic Search

This paper presents the Modify-on-Access (Mona) file system that provides extensibility through transformations applied to streams of data. Mona overcomes two limitations of prior extensible file systems. First, the Mona file system offers two levels of extensions (kernel and user) that share a common interface. It allows performance-critical operations to execute with modest overhead in the kernel and untrusted or

H. Richard Kendall; Vincent W. Freeh; Paul W. Schermerhorn; Robert J. Minerick; Peter W. Rijks

2002-01-01

79

Using model checking to find serious file system errors  

Microsoft Academic Search

This paper shows how to use model checking to find serious errors in file systems. Model checking is a for- mal verification technique tuned for finding corner-case errors by comprehensively exploring the state spaces de- fined by a system. File systems have two dynamics that make them attractive for such an approach. First, their errors are some of the most

Junfeng Yang; Paul Twohey; Dawson R. Engler; Madanlal Musuvathi

2006-01-01

80

User-Level Extensibility in the Mona File System  

Microsoft Academic Search

An extensible file system raises the level of file abstraction which provides benefits to both the end-user andprogrammer. The Modify-on-Access file system provides safe and simple user-defined extensibility through transformations,which are modular operations on input and output streams. A user inserts transformations into input andoutput streams, which modify the data accessed. Untrusted transformations execute in user space for safety. Performanceof

Paul W. Schermerhorn; Robert J. Minerick; Peter W. Rijks; Vincent W. Freeh

2001-01-01

81

PVFS: A Parallel File System for Linux Clusters  

Microsoft Academic Search

As Linux clusters have matured as platforms for low- cost, high-performance parallel computing, software packages to provide many key services have emerged, especially in areas such as message passing and net- working. One area devoid of support, however, has been parallel file systems, which are critical for high- performance I\\/O on such clusters. We have developed a parallel file system

Philip H. Carns; Walter B. Ligon III; Robert B. Ross; Rajeev Thakur

2002-01-01

82

Model-checking Part of a Linux File System  

Microsoft Academic Search

We present our experiences with model checking part of a Linux file system. The work is set in the context of Hoare's verification grand challenge, and, in particular, Joshi and Holzmann's mini-challenge to build a verifiable file system. The primary aim of the work was to construct a larger scale case study upon which to measure our own research into

Andy Galloway; Jan Tobias Mühlberg; Radu Siminiceanu; Gerald Lüttgen

83

Synchronization and Caching Issues in the Andrew File System  

Microsoft Academic Search

Many distributed file systems go to great extremes to provide exactly the same consistency semantics in a distributed environment as they provide in the single machine case, often at great cost to performance. Other distributed file systems go to the other extreme, and provide good performance, but with extremely weak con- sistency guarantees. However, a good compromise can be achieved

Michael L. Kazar

1988-01-01

84

Designing a secure reliable file system for sensor networks  

Microsoft Academic Search

Wireless sensor networks are increasingly being used to mon- itor habitats, analyze traffic patterns, study troop move- ments, and gather data for reconnaissance and surveillance missions. Many wireless sensor networks require the protec- tion of their data from unauthorized access and malicious tampering, motivating the need for a secure and reliable file system for sensor nodes. The file system presented

Neerja Bhatnagar; Ethan L. Miller

2007-01-01

85

Eight-terabyte storage system by a new file system  

NASA Astrophysics Data System (ADS)

How an eight-terabyte CD-ROM storage system could behave as a standard CD-ROM peripheral device without a specifically designed device driver on any operation system is discussed in this paper. Because normal tertiary storage systems can hardly hold a capacity with terabyte magnitudes, so a new file system based on Small Computer System Interface (SCSI) is presented, which can address as many as eight-terabyte storage memories. An experimental system called 'Virtual CD-ROM' system of this idea is discussed, and some techniques critical to the fulfillment of such a system are considered.

Xiong, Jinjun; Pan, Longfa; Pei, Jing; Meng, Desheng

2001-02-01

86

Comparison of leading parallel NAS file systems on commodity hardware  

SciTech Connect

High performance computing has experienced tremendous gains in system performance over the past 20 years. Unfortunately other system capabilities, such as file I/O, have not grown commensurately. In this activity, we present the results of our tests of two leading file systems (GPFS and Lustre) on the same physical hardware. This hardware is the standard commodity storage solution in use at LLNL and, while much smaller in size, is intended to enable us to learn about differences between the two systems in terms of performance, ease of use and resilience. This work represents the first hardware consistent study of the two leading file systems that the authors are aware of.

Hedges, R; Fitzgerald, K; Gary, M; Stearman, D M

2010-11-08

87

Disconnected Operation in the Coda File System  

Microsoft Academic Search

How can we improve ($#$#$#CommaToBeDetercollection of untrusted ,Unix,clients and a much ,smaller number,of trusted ,Unix file servers. The ,design ,is optimized for the access and sharing patterns typical of

James J. Kistler; Mahadev Satyanarayanan

1991-01-01

88

DFS: A File System for Virtualized Flash Storage  

Microsoft Academic Search

This paper presents the design, implementation and evalua- tion of Direct File System (DFS) for virtualized flash storag e. Instead of using traditional layers of abstraction, our lay ers of abstraction are designed for directly accessing flash memor y de- vices. DFS has two main novel features. First, it lays out its files directly in a very large virtual storage

William K. Josephson; Lars Ailo Bongo; David Flynn; Kai Li

2010-01-01

89

Truffles - Secure File Sharing With Minimal System Administrator Intervention  

Microsoft Academic Search

The Truffles file system supports file sharing between arbitrary users at arbitrary sites connected by a network. Truffles is an interesting example of a service of the future that will automatically allow users to collaborate with other users anywhere in the world in ways not currently possible. These services, and Truffles in particular, have the potential of greatly increasing the

Peter Reiher; Jr. Gerald Popek

1993-01-01

90

Availability and Consistency Tradeoffs in the Echo Distributed File System  

Microsoft Academic Search

Workstations typically depend on remote servers accessed over a network for such services as mail, printing, storing files, booting, and time. The availability of these remote services has a major impact on the usability of the workstation. Availability can be increased by repli- cating the servers. In the Echo distributed file system at DEC SRC, two different replication techniques are

Andy Hisgen; Andrew Birrell; Timothy Mann; Michael D. Schroeder; Garret Swart

1989-01-01

91

Using the Sirocco File System for high-bandwidth checkpoints.  

SciTech Connect

The Sirocco File System, a file system for exascale under active development, is designed to allow the storage software to maximize quality of service through increased flexibility and local decision-making. By allowing the storage system to manage a range of storage targets that have varying speeds and capacities, the system can increase the speed and surety of storage to the application. We instrument CTH to use a group of RAM-based Sirocco storage servers allocated within the job as a high-performance storage tier to accept checkpoints, allowing computation to potentially continue asynchronously of checkpoint migration to slower, more permanent storage. The result is a 10-60x speedup in constructing and moving checkpoint data from the compute nodes. This demonstration of early Sirocco functionality shows a significant benefit for a real I/O workload, checkpointing, in a real application, CTH. By running Sirocco storage servers within a job as RAM-only stores, CTH was able to store checkpoints 10-60x faster than storing to PanFS, allowing the job to continue computing sooner. While this prototype did not include automatic data migration, the checkpoint was available to be pushed or pulled to disk-based storage as needed after the compute nodes continued computing. Future developments include the ability to dynamically spawn Sirocco nodes to absorb checkpoints, expanding this mechanism to other fast tiers of storage like flash memory, and sharing of dynamic Sirocco nodes between multiple jobs as needed.

Klundt, Ruth Ann; Curry, Matthew L.; Ward, H. Lee

2012-02-01

92

5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.  

Code of Federal Regulations, 2013 CFR

...Composition of, and access to, the Employee Medical File System. 293.504 Section 293...REGULATIONS PERSONNEL RECORDS Employee Medical File System Records § 293.504 Composition of, and access to, the Employee Medical File System. (a) All employee...

2013-01-01

93

75 FR 27986 - Electronic Filing System-Web (EFS-Web) Contingency Option  

Federal Register 2010, 2011, 2012, 2013

...PTO-P-2010-0040] Electronic Filing System--Web (EFS-Web) Contingency Option AGENCY: United States Patent and...electronic filing system, Electronic Filing System--Web (EFS-Web) by providing a new contingency option...

2010-05-19

94

File  

NSDL National Science Digital Library

With a cover that looks suspiciously like one of the 20th century's most beloved photographic magazines (hint: "File" is an anagram of its moniker), File is an online photography magazine that specializes in "alternate takes, odd angles, unconventional observations". As its makers wryly note, "We leave the Kodak Moments to the family album, the glossy fashion spreads to Vogue, and the photo finishes to ESPN". While the site is relatively new, there is a good deal to browse through here, and visitors can start with a trip to the thematic galleries, and also stop by the contributors section to learn more about each individual photographer. One rather intriguing collection is called "Rustfetish" and features the work of Vince Stinson, whose artistic statement notes that "...these photos prove that by celebrating/the love of rust and all that rusts". The site also includes "Karaoke Camera", in which the editors of the FILE offer a photographic theme or trope, and visitors are encouraged to submit photographs related to that particular idea.

95

Fast and Secure Distributed Read-Only File System  

Microsoft Academic Search

Internet users increasingly rely on publicly available data for everything from software installation to investment decisions. Unfortunately, the vast majority of public content on the Internet comes with no integrity or authenticity guarantees. This paper presents the self-certifying read-only file system, a content distribution system providing secure, scalable access to public, read-only data. The read-only file system makes the security

Kevin Fu; M. Frans Kaashoek; David Mazières

2000-01-01

96

A Model for Accessing Resources of the Distributed File Systems  

Microsoft Academic Search

The modern operating systems must integrate various Internet services, especially World-Wide Web facilities to access different\\u000a Web resources using file system mechanisms. In this paper we present a high-level model to access via Web the resources of\\u000a a distributed file system. The proposed description is based on Resource Description Framework (RDF) recommendation of the World-Wide Web Consortium, a standardized foundation

Sabin C. Buraga

2001-01-01

97

A CDP method in an object-based file system  

NASA Astrophysics Data System (ADS)

Recent advances in large-capacity, low-cost storage devices have led to active research in design of large-scale storage system built from commodity devices. These storage systems are composed of thousands of storage device and require an efficient file system to provide high system bandwidth and petabyte-scale data storage. Object-based file system integrates advantage of both NAS and SAN, can be applied in above environment. Continuous data protection (CDP) is a methodology that continuously captures or tracks data modifications and stores changes independent of the primary data, enabling recovery points from any point in the past. All changes to files and file metadata are stored and managed. A CDP method in Object-based file system is presented in this thesis to improve the system reliability. Firstly, we can get detail at byte level of every write request because data protection operates at the file system level. It can consume less storage space. Secondly, every object storage server can compute the recovery strip data object independently to decrease the recovery time. Thirdly a journal-like metadata management way is introduced to provide metadata optimization for CDP.

Yao, Jie; Cao, Qiang; Li, Huaiyang

2008-12-01

98

76 FR 71019 - Amendment of Inspector General's Operation and Reporting (IGOR) System Investigative Files (EPA-40)  

Federal Register 2010, 2011, 2012, 2013

...Reporting (IGOR) System Investigative Files (EPA-40) AGENCY: Environmental Protection...Reporting (IGOR) System Investigative Files (EPA-40) to the Inspector General Enterprise...able to consider your comment. Electronic files should avoid the use of special...

2011-11-16

99

PVFS : a parallel file system for linux clusters  

Microsoft Academic Search

As Linux clusters have matured as platforms for low-cost, high-performance parallel computing, software packages to provide many key services have emerged, especially in areas such as message passing and net-working. One area devoid of support, however, has been parallel file systems, which are critical for high-performance I\\/O on such clusters. We have developed a parallel file system for Linux clusters,

Philip H. Carns; Walter B. Ligon; R. B. Ross; R. Thakur

2000-01-01

100

The Case for Reexamining Integrated File System Design  

Microsoft Academic Search

Research in integrated file systems—file sys- tems that support different types of data and applica- tions with diverse performance requirements—has stag- nated since the commercial failure of video-on-demand sys- tems in the 1990s. However, the past two years have seen an acceleration in the development and deployment of sev- eral new technologies aimed at web-based multimedia ap- plications. These technologies

Prashant Shenoy

2000-01-01

101

A formal system for information retrieval from files  

Microsoft Academic Search

A generalized file structure is provided by which the concepts of keyword, index, record, file, directory, file structure, directory decoding, and record retrieval are defined and from which some of the frequently used file structures such as inverted files, index-sequential files, and multilist files are derived.Two algorithms which retrieve records from the generalized file structure are presented.

David Hsiao; Frank Harary

1970-01-01

102

Design and implementation of a configurable mixed-media file system  

Microsoft Academic Search

In this paper we describe the design and implementation of a configurable mixed-media file system. The attribute configurable means that a file system serving a specific application area can be realized out of a library of reusable file system classes. The attribute mixed-media stands for the file system's ability to integrate different media types (RAM, harddisks, WORM optical disks, CDROMs,

Silvano Maffeis

1994-01-01

103

DSFS: Decentralized security for large parallel file systems  

Microsoft Academic Search

This paper describes DSFS, a decentralized security system for large parallel file system. DSFS stores global access control lists (ACLs) in a centralized decision-making server and pushes pre-authorization lists (PALs) into storage devices. Thus DSFS allows users to flexibly set any access control policy for the global ACL or even change the global ACL system without having to upgrade the

Zhongying Niu; Hong Jiang; Ke Zhou; Dan Feng; Shuping Zhang; Tianming Yang; Dongliang Lei; Anli Chen

2010-01-01

104

Dynamic Metadata Management for Petabyte-Scale File Systems  

Microsoft Academic Search

In petabyte-scale distributed file systems that decouple read and write from metadata operations, behavior of the metadata server cluster will be critical to overall system performance and scalability. We present a dynamic subtree partitioning and adaptive metadata management system designed to efficiently manage hierarchical metadata workloads that evolve over time. We examine the relative merits of our approach in the

Sage A. Weil; Kristal T. Pollack; Scott A. Brandt; Ethan L. Miller

2004-01-01

105

Highway Safety Information System Guidebook for the North Carolina State Data Files. Volume 1. SAS File Formats.  

National Technical Information Service (NTIS)

The North Carolina database which is incorporated into the Highway Safety Information System (HSIS) system is derived from the NC 'MERGE' system. North Carolina provides data to HSIS in four different files -- accident characteristics, vehicles in the acc...

F. M. Council E. G. Hamilton Y. Mohamedshah

1995-01-01

106

The Spider Center Wide File System; From Concept to Reality  

SciTech Connect

The Leadership Computing Facility (LCF) at Oak Ridge National Laboratory (ORNL) has a diverse portfolio of computational resources ranging from a petascale XT4/XT5 simulation system (Jaguar) to numerous other systems supporting development, visualization, and data analytics. In order to support vastly different I/O needs of these systems Spider, a Lustre-based center wide file system was designed and deployed to provide over 240 GB/s of aggregate throughput with over 10 Petabytes of formatted capacity. A multi-stage InfiniBand network, dubbed as Scalable I/O Network (SION), with over 889 GB/s of bisectional bandwidth was deployed as part of Spider to provide connectivity to our simulation, development, visualization, and other platforms. To our knowledge, while writing this paper, Spider is the largest and fastest POSIX-compliant parallel file system in production. This paper will detail the overall architecture of the Spider system, challenges in deploying and initial testings of a file system of this scale, and novel solutions to these challenges which offer key insights into file system design in the future.

Shipman, Galen M [ORNL; Dillow, David A [ORNL; Oral, H Sarp [ORNL; Wang, Feiyi [ORNL

2009-01-01

107

Churn Tolerant Virtual Organization File System for Grids  

Microsoft Academic Search

A Grid computing environment allows forming Virtual Or- ganizations (VOs) to aggregate and share resources. We present a VO File System (VOFS) which is a VO-aware distributed le system that al- lows VO members to share les within a VO. VOFS supports access and location transparency by maintaining a common le namespace, which is decentralized to avoid a single point

Leif Lindbäck; Vladimir Vlassov; Shahab Mokarizadeh; Gabriele Violino

2009-01-01

108

TFILE: A User Callable Tape File Archiving System for NOS.  

National Technical Information Service (NTIS)

TFILE is a tape archival system which operates on a Control Data Network Operating System (NOS) and which allows the timesharing user logged into NOS to transfer files between his disk storage area and an archival tape. This document describes TFILE opera...

G. L. Lane

1978-01-01

109

Technological Developments with the FDA Adverse Drug Reaction File System  

Microsoft Academic Search

A review of the Food and Drug Administration (FDA) Adverse Drug Reaction (ADR) file system. This paper describes the current operations for maintaining the on-line computerized data entry, storage and retrieval programs, and the microfilm retrieval system. Other technology developments discussed include data diskette exchange and laser disc storage and retrieval.

Alan Gelberg; George D. Armstrong; Michael W. Dreis; Charles Anello

1991-01-01

110

The ITC Distributed File System: Principles and Design  

Microsoft Academic Search

This paper presents the design and rationale of a distributed file system for a network of more than 5000 personal computer workstations. While scale has been the dominant design influence, careful attention has also been paid to the goals of location transparency, user mobility and compatibility with existing operating system interfaces. Security is an important design consideration, and the mechanisms

Mahadev Satyanarayanan; John H. Howard; David A. Nichols; Robert N. Sidebotham; Alfred Z. Spector; Michael J. West

1985-01-01

111

CA-NFS: A Congestion-Aware Network File System  

Microsoft Academic Search

We develop a holistic framework for adaptively schedul- ing asynchronous requests in distributed file systems. The system is holistic in that it manages all resources, including network bandwidth, server I\\/O, server CPU, and client and server memory utilization. It acceler- ates, defers, or cancels asynchronous requests in order to improve application-perceived performance directly. We employ congestion pricing via online auctions

Alexandros Batsakis; Randal C. Burns; Arkady Kanevsky; James Lentini; Thomas Talpey

2009-01-01

112

A trace-driven analysis of the UNIX 4.2 BSD file system  

Microsoft Academic Search

We analyzed the UNIX 4.2BSD file system by recording activity in trace files and writing programs to analyze the traces. The trace analysis shows that the average file system bandwidth needed per user is low (a few hundred bytes per second). Most of the files accessed are short, are open a short time, and are accessed sequentially. Most new information

John K. Ousterhout; Hervé Da Costa; David Harrison; John A. Kunze; Michael D. Kupfer; James G. Thompson

1985-01-01

113

An Empirical Study of Testing File-System-Dependent Software with Mock Objects  

Microsoft Academic Search

Unit testing is a technique of testing a single unit of a program in isolation. The testability of the unit under test can be reduced when the unit interacts with its environment. The construction of high-covering unit tests and their exec u- tion require appropriate interactions with the environmen t such as a file system or database. To help set

Madhuri R. Marri; Tao Xie; Nikolai Tillmann; Jonathan de Halleux; Wolfram Schulte

2009-01-01

114

A 64-bit, Shared Disk File System for Linux  

Microsoft Academic Search

In computer systems today, speed and responsiveness is often determined by network and storage subsystem per- formance. Faster, more scalable networking interfaces like Fibre Channel and Gigabit Ethernet provide the scaf- folding from which higher performance implementations may be constructed, but new thinking is required about how machines interact with network-enabled storage de- vices. We have developed a Linux file

Kenneth W. Preslan; Andrew P. Barry; Jonathan E. Brassow; Grant M. Erickson; Erling Nygaard; Christopher J. Sabol; Steven R. Soltis; David C. Teigland; Matthew T. O'keefe

1999-01-01

115

GLIMPSE: A Tool to Search Through Entire File Systems  

Microsoft Academic Search

GLIMPSE, which stands for GLobal IMPlicit SEarch, provides indexing and query schemes for file systems. The novelty of glimpse is that it uses a very small index — in most cases 2-4% of the size of the text — and still allows very flexible full-text retrieval including Boolean queries, approximate matching (i.e., allowing misspel- ling), and even searching for regular

Udi Manber; Sun Wu

1994-01-01

116

FotoFile: a consumer multimedia organization and retrieval system  

Microsoft Academic Search

FotoFile is an experimental system for multimediaorganization and retrieval, based upon the design goal of makingmultimedia content accessible to non-expert users. Search andretrieval are done in terms that are natural to the task. Thesystem blends human and automatic annotation methods. It extendstextual search, browsing, and retrieval technologies to supportmultimedia data types.

Allan Kuchinsky; Celine Pering; Michael L. Creech; Dennis F. Freeze; Bill Serra; Jacek Gvvizdka

1999-01-01

117

Experience of using the Chirp distributed file system in ATLAS  

NASA Astrophysics Data System (ADS)

Chirp is a user-level file system specifically designed for the wide area network, and developed by the University of Notre Dame CCL group. We describe the design features making it particularly suited to the Grid environment, and to ATLAS use cases. The deployment and usage within ATLAS distributed computing are discussed, together with scaling tests and evaluation for the various use cases.

Walker, Rodney; Nilsson, Paul

2012-12-01

118

Building secure file systems out of byzantine storage  

Microsoft Academic Search

This paper shows how to implement a trusted network file system on an untrusted server. While cryptographic storage techniques exist that allow users to keep data secret from untrusted servers, this work concentrates on the detection of tampering attacks and stale data. Ideally, users of an untrusted storage server would immediately and unconditionally notice any misbehavior on the part of

David Mazières; Dennis Shasha

2002-01-01

119

70 FR 8200 - Foreign Trade Regulations: Mandatory Automated Export System Filing for All Shipments Requiring...  

Federal Register 2010, 2011, 2012, 2013

...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...System (AES) or through the AESDirect for all shipments where a Shipper's Export...

2005-02-17

120

78 FR 16365 - Foreign Trade Regulations: Mandatory Automated Export System Filing for All Shipments Requiring...  

Federal Register 2010, 2011, 2012, 2013

...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...System (AES) or through AESDirect for all shipments of used self-propelled...

2013-03-14

121

76 FR 4001 - Foreign Trade Regulations (FTR): Mandatory Automated Export System Filing for All Shipments...  

Federal Register 2010, 2011, 2012, 2013

...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...Mandatory Automated Export System Filing for All Shipments Requiring Shipper's Export Declaration...System (AES) or through AESDirect for all shipments of used self-propelled...

2011-01-21

122

FARMER: a novel approach to file access correlation mining and evaluation reference model for optimizing peta-scale file system performance  

Microsoft Academic Search

Abstract File correlations have become,an increasingly important consideration for performance,enhancement,in peta-scale storage systems. Previous studies on file correlations main ly concern with two aspects of files: file access sequence and semantic attribute. Based on mining with regard to these two aspects of file systems, various strategies have been proposed to optimize the overall system performance. Un- fortunately, all of these

Peng Xia; Dan Feng; Hong Jiang; Lei Tian; Fang Wang

2008-01-01

123

Accurate and Efficient Replaying of File System Traces  

Microsoft Academic Search

Replaying traces is a time-honored method for bench- marking, stress-testing, and debugging systems—and more recently—forensic analysis. One benefit to replay- ing traces is the reproducibility of the exact set of op- erations that were captured during a specific workload. Existing trace capture and replay systems operate at dif- ferent levels: network packets, disk device drivers, net- work file systems, or

Nikolai Joukov; Timothy Wong; Erez Zadok

2005-01-01

124

Mining Logs Files for Computing System Management  

Microsoft Academic Search

With advancement in science and technology, computing systems become increasingly more difficult to monitor, manage and maintain. Traditional approaches to system management have been largely based on domain experts through a knowledge acquisition process to translate domain knowledge into operating rules and policies. This has been experienced as a cumbersome, labor intensive, and error prone process. There is thus a

Wei Peng; Tao Li; Sheng Ma

2005-01-01

125

20 CFR 30.102 - In general, how does an employee file a claim for additional impairment or wage-loss under Part E...  

Code of Federal Regulations, 2013 CFR

...COMPENSATION PROGRAM ACT OF 2000, AS AMENDED Filing Claims; Evidence and Burden of Proof; Special Procedures for Certain Cancer Claims Filing Claims for Benefits Under Eeoicpa § 30.102 In general, how does an employee file a claim for...

2013-04-01

126

On the benefits of a workflow-aware file system in high-performance computing systems  

Microsoft Academic Search

Traditional high-performance computing (HPC) systems have independent job schedulers and file systems that do not interact in substantial ways. We make the case that some integration of scheduler and file system can have three main benefits. First, the dataflow dependencies between the jobs in a workflow can be inferred by combining the scheduler's knowledge of the jobs (and possibly control-flow)

Yang Wang; Paul Lu

2005-01-01

127

Assessing Employment Discrimination Charges Filed by Individuals With Psychiatric Disabilities Under the Americans With Disabilities Act  

Microsoft Academic Search

This article presents findings from analyses of nationwide data on employment discrimination charges filed under the Americans With Disabilities Act (ADA). In conducting the analyses, emphasis was placed on understanding the extent to which the ADA charge process differentially affects individuals with psychiatric disabilities. We found that 16.3% of individuals whose charges were closed as of June 30, 1995, received

KATHRYN MOSS; MATTHEW JOHNSEN; MICHAEL ULLMAN

1998-01-01

128

GPFS on AIX Clusters: High Performance File System Administration Simplified  

Microsoft Academic Search

With the newest release of General Parallel File System for AIX (GPFS), release 1.4, the range of supported hardware platforms has been extended to include AIX RS\\/6000 workstations that are not part of an RS\\/6000 SP system. This is the first time that GPFS has been offered to non-RS\\/6000 SP users. Running GPFS outside of the RS\\/6000 SP does require

Abbas Farazdel; Robert Curran; Astrid Jaehde; Gordon Mcpheeters; Raymond Paden; Ralph E. Wescott

2001-01-01

129

Metadata management for CDP in object-based file system  

NASA Astrophysics Data System (ADS)

Object-based storage system integrates advantage of both NAS and SAN, can be applied in large-capacity, low-cost and large-scale storage systems which are built from commodity devices. Continuous data protection (CDP) is a methodology that continuously captures or tracks data modifications and stores changes independent of the primary data, enabling recovery points from any point in the past. An efficient file system optimized for CDP is needed to provide CDP feature in object-based storage system. In this thesis, a new metadata management method is present. All necessary meta data information are recorded when changes happened to file system. We have a journal-like data placement algorithm to store these metadata. Secondly, this metadata management method provides both CDP feature and Object-based feature. Two type write operations are analyzed to reduce storage space consumption. Object-based data allocation algorithm can take the advantage of distributed file system to concurrently process CDP operations over storage nodes. Thirdly, history revisions and recovery operations are discussed. Finally, the experiment test result is present and analyzed.

Yao, Jie; Cao, Qiang; Huang, Jianzhong

2009-08-01

130

Measurement study of peer-to-peer file sharing systems  

NASA Astrophysics Data System (ADS)

The popularity of peer-to-peer multimedia file sharing applications such as Gnutella and Napster has created a flurry of recent research activity into peer-to-peer architectures. We believe that the proper evaluation of a peer-to-peer system must take into account the characteristics of the peers that choose to participate. Surprisingly, however, few of the peer-to-peer architectures currently being developed are evaluated with respect to such considerations. In this paper, we remedy this situation by performing a detailed measurement study of the two popular peer-to-peer file sharing systems, namely Napster and Gnutella. In particular, our measurement study seeks to precisely characterize the population of end-user hosts that participate in these two systems. This characterization includes the bottleneck bandwidths between these hosts and the Internet at large, IP-level latencies to send packets to these hosts, how often hosts connect and disconnect from the system, how many files hosts share and download, the degree of cooperation between the hosts, and several correlations between these characteristics. Our measurements show that there is significant heterogeneity and lack of cooperation across peers participating in these systems.

Saroiu, Stefan; Gummadi, P. Krishna; Gribble, Steven D.

2001-12-01

131

Part III: AFS - A Secure Distributed File System  

SciTech Connect

AFS is a secure distributed global file system providing location independence, scalability and transparent migration capabilities for data. AFS works across a multitude of Unix and non-Unix operating systems and is used at many large sites in production for many years. AFS still provides unique features that are not available with other distributed file systems even though AFS is almost 20 years old. This age might make it less appealing to some but with IBM making AFS available as open-source in 2000, new interest in use and development was sparked. When talking about AFS, people often mention other file systems as potential alternatives. Coda (http://www.coda.cs.cmu.edu/) with its disconnected mode will always be a research project and never have production quality. Intermezzo (http://www.inter-mezzo.org/) is now in the Linux kernel but not available for any other operating systems. NFSv4 (http://www.nfsv4.org/) which picked up many ideas from AFS and Coda is not mature enough yet to be used in serious production mode. This article presents the rich features of AFS and invites readers to play with it.

Wachsmann, A.; /SLAC

2005-06-29

132

Local Optimal File Delivery Scheduling in a Hop by Hop File Delivery System on a One Link Model  

NASA Astrophysics Data System (ADS)

Many content distribution systems such as CDN and P2P file sharing have been developed. In these systems, file-type contents require downloads to be completed before they can be played and they have no value before the download finishes. Therefore, a user's satisfaction depends on the length of the service latency. That is, the length of time from when the user issued a request until the user received an entire file. Reducing the sum of that time is necessary for the whole delivery system to satisfy users and maintain dependability on system performance. We discuss a hop-by-hop file delivery system suitable for delivering file contents whereby the sum of service latency is reduced by using the request conditions. Moreover, we propose a file delivery scheduling algorithm for a one-link model given that the content request frequency is unknown. The algorithm is based on a local optimal strategy. We performed a characteristic analysis by computer simulation. The results showed that our algorithm performs at nearly the theoretical efficiency limit of the hop-by-hop system when the request frequency distribution of each content has a deviation.

Tsurumi, Hiromi; Miyata, Takamichi; Yamaoka, Katsunori; Sakai, Yoshinori

133

12 CFR 550.125 - How do I file the notice under § 550.70(c)?  

Code of Federal Regulations, 2013 CFR

...SUPERVISION, DEPARTMENT OF THE TREASURY FIDUCIARY POWERS OF SAVINGS ASSOCIATIONS Obtaining Fiduciary Powers § 550.125 How do I file the notice under...file a notice under § 550.70(c), within ten days after you commence the...

2013-01-01

134

Vnodes: An Architecture for Multiple File System Types in Sun UNIX  

Microsoft Academic Search

This paper describes an architecture for accommodating multiple file system implementations within theSun UNIX+ kernel. The file system implementations can encompass local, remote, or even non-UNIX filesystems. These file systems can be "plugged" into the kernel through a well defined interface, much thesame way as UNIX device drivers are currently added to the kernel.

Steve R. Kleiman

1986-01-01

135

MPI-IO on a Parallel File System for Cluster of Workstations  

Microsoft Academic Search

Since the MPI-IO definition, a standard interface for parallel IO, some implementations are available for clusters of workstations, but the performances are within the limits of the file system (typically NFS). New parallel file systems are now available on clusters of workstations and provide higher performances. A first idea is to interface such a parallel file system to a portable

Hakan Taki; Gil Utard

1999-01-01

136

yFS: A Journaling File System Design for Handling Large Data Sets with Reduced Seeking  

Microsoft Academic Search

In recent years, disk seek times have not improved commensurately with CPU performance, memory system performance, and disk transfer rates. Furthermore, many modern applications are making increasing use of large files. Traditional file system designs are limited in how they address these two trends. We present the design of a file system called yFS that consciously reduces disk seeking and

Zhihui Zhang; Kanad Ghose

2003-01-01

137

Pangaea: a symbiotic wide-area file system  

Microsoft Academic Search

Pangaea is a planetary-scale file system designed for large, multi-national corporations or groups of collaborating users spread over the world. Its goal is to handle people's daily stor-age needs, e. g., document sharing, software development, and data crunching, that can be write intensive. Pangaea uses per-vasive replication to achieve low access latency and high avail-ability. It creates replicas dynamically whenever

Yasushi Saito; Christos T. Karamanolis

2002-01-01

138

Detecting Data Concealment Programs Using Passive File System Analysis  

NASA Astrophysics Data System (ADS)

Individuals who wish to avoid leaving evidence on computers and networks often use programs that conceal data from conventional digital forensic tools. This paper discusses the application of passive file system analysis techniques to detect trace evidence left by data concealment programs. In addition, it describes the design and operation of Seraph, a tool that determines whether certain encryption, steganography and erasing programs were used to hide or destroy data.

Davis, Mark; Kennedy, Richard; Pyles, Kristina; Strickler, Amanda; Shenoi, Sujeet

139

Mean filed study of disordered spin-12 antiferromagnetic systems  

NASA Astrophysics Data System (ADS)

We present a mean filed theory picture of disordered spin-12 antiferromagnetic system as a function of the degree of disorder, in connection to the insulating doped semiconductors. The system is a resonant valence bond (RVB) liquid state at zero disorder, and a possible RVB glass state when the disorder is finite but weak. For a highly disordered system, we show that the essential physics is the formation and decimation of strongly coupled bonds, and the thermodynamics shows an effective power-law singularity, in qualitative agreement with renormalization group result of Bhatt and Lee.

Dobrosavljevic, Vladimir; Zhou, Sen; Miranda, Eduardo

2008-03-01

140

77 FR 15026 - Privacy Act of 1974; Farm Records File (Automated) System of Records  

Federal Register 2010, 2011, 2012, 2013

...Secretary Privacy Act of 1974; Farm Records File (Automated) System of Records AGENCY...Act System of Records titled Farm Records File (Automated) USDA/FSA-2. The records...INFORMATION: FSA maintains the Farm Records File (Automated) USDA/FSA-2...

2012-03-14

141

SemFS: A Semantic approach to File Systems  

Microsoft Academic Search

Hard Disk capacity is increasing all the time. This has brought with it a new problem; the task of locating files is getting harder by the day. Retrieving a doc- ument from the myriad of files and directories is no longer an easy task. SemFS integrates searching of files based on meta- data as a basic function of the file

Prashanth Mohan; Venkateswaran S; Raghuraman M; Arul Siromoney

142

Streaming RAID: a disk array management system for video files  

Microsoft Academic Search

The characteristics of digital video files and traffic differ substantially from those encountered with data applications: (i) video files are much larger than data files, and (ii) video traffic is continuous in nature while data traffic is bursty, with the data rate of a video stream much higher than the mean rate of a data traffic source. Accordingly, conventional file

Fouad A. Tobagi; Joseph Pang; Randall Baird; Mark Gang

1993-01-01

143

Concurrent processes of CDP in object-based file system  

NASA Astrophysics Data System (ADS)

An object-based storage system - integrating advantages of both NAS and SAN - can be applied in large-capacity, lowcost and large-scale storage systems built from commodity disk devices. The continuous data protection or CDP is a well-known technique that continuously captures or tracks data modifications and stores changes independent of primary data, enabling data recovery - from any point in the past. An efficient file system optimized for CDP plays an important role in object-based storage systems. In this paper, concurrent processes during data backup and data recovery operations are discussed in details. To fully take the advantage of distributed system architectures, we make the concurrent data operations as far as possible during read, write, and recovery processes. A new backup data object placement strategy is present to work in coordination with a replica strategy in object-based distributed file systems. Backup data object can be placed in other object storage servers (or OSS for short) instead of the OSS where the original data is residing, when the backup data object matches certain conditions. For data recovery, we make the related OSSes to concurrently perform data object movement. All these strategies can efficiently reduce system response times.

Yao, Jie; Cao, Qiang; Huang, Jianzhong

2009-08-01

144

26 CFR 301.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Required use of magnetic media for returns by organizations required...301.6033-4 Required use of magnetic media for returns by organizations required...file returns under section 6033 on magnetic media. An organization required to file a...

2013-04-01

145

File Assignment in Parallel I\\/O Systems with Minimal Variance of Service Time  

Microsoft Academic Search

We address the problem of assigning nonpartitioned files in a parallel I\\/O system where the file accesses exhibit Poisson arrival rates and fixed service times. We present two new file assignment algorithms based on open queuing networks which aim at minimizing simultaneously the load balance across all disks, as well as the variance of the service time at each disk.

Lin-wen Lee; Peter Scheuermann; Radek Vingralek

2000-01-01

146

A database management system for residency applicant files.  

PubMed

An automated system for recording information pertaining to applicants to the Internal Medicine Residency Program at Temple University Hospital was developed in 1983. Major objectives were to improve recordkeeping, filing, communication with applicants, and efficiency of the review committee's process. Reports generated have permitted tracking of the applicant pool throughout the recruiting season and collection of statistics which may be compared with prior years. The capacity of the Residency Office to market the Internal Medicine Residency Program through prompt, accurate, and personal communication with each applicant has been facilitated. PMID:3370956

Ledwith, M; Myers, A R

1988-04-01

147

12 CFR 150.125 - How do I file the notice under § 150.70(c)?  

Code of Federal Regulations, 2013 CFR

...CURRENCY, DEPARTMENT OF THE TREASURY FIDUCIARY POWERS OF FEDERAL SAVINGS ASSOCIATIONS Obtaining Fiduciary Powers § 150.125 How do I file the notice...a notice under § 150.70(c), within ten days after you commence the...

2013-01-01

148

Adding Secure Deletion to Your Favorite File System  

Microsoft Academic Search

Files or even their names often contain confidential or secret information. Most users believe that such infor- mation is erased as soon as they delete a file. Even those who know that this is not true often ignore the issue. Nev- ertheless, recovering deleted files is trivial and can be performed even by novice hackers. The problem is ex- acerbated

Nikolai Joukov; Erez Zadok

2005-01-01

149

Ordering and single-file diffusion in colloidal systems  

NASA Astrophysics Data System (ADS)

The structural properties and the single-file diffusion in one-dimensional interacting colloidal systems are studied by means of Brownian dynamics simulations. We consider three types of particle interactions, namely, Weeks-Chandler-Andersen, screened Coulomb, and superparamagnetic potentials. We find that, regardless of the interaction potential, at low densities particles are distributed in a typical fluidlike structure and at higher densities or potential strengths become spatially correlated at long-distances. Particularly, our findings demonstrate that one-dimensional systems, with particles interacting repulsively, show common structural and dynamical behaviors at the boundary in which the degree of ordering changes dramatically; the main peak of the static structure factor becomes highly narrow with a height of Sc~7, whereas the reduced mobility factor F, which is associated with the single-file diffusion at long-times or long wavelengths, reaches values F*~0.1. These features are analyzed and discussed in the context of a local order-disorder transition.

Herrera-Velarde, Salvador; Zamudio-Ojeda, Adalberto; Castañeda-Priego, Ramón

2010-09-01

150

GPFS on AIX Clusters: High Performance File System Administration Simplified  

SciTech Connect

With the newest release of General Parallel File System for AIX (GPFS), release 1.4, the range of supported hardware platforms has been extended to include AIX RS/6000 workstations that are not part of an RS/6000 SP system. This is the first time that GPFS has been offered to non-RS/6000 SP users. Running GPFS outside of the RS/6000 SP does require that HACMP/ES is configured and that the RS/6000 systems within the HACMP cluster that will be part of the GPFS cluster be concurrently connected to an SSA disk subsystem. This redbook focuses on the planning, installation and implementation of GPFS in a cluster environment. The tasks to be covered include the installation and configuration of HACMP to support the GPFS cluster, implementation of the GPFS software, and developing application programs that use GPFS. A troubleshooting chapter is added in case any problems arise.

Farazdel, Abbas (International Technical Support Organization, IBM); Curran, Robert (IBM); Jaehde, Astrid (Availant); Mcpheeters, Gordon (IBM); Paden, Raymond (IBM); Wescott, Ralph E. (BATTELLE (PACIFIC NW LAB))

2001-08-03

151

Human factors challenges in creating a principal support office system—the speech filing system approach  

Microsoft Academic Search

This paper identifies the key behavioral challenges in designing a principal-support office system and our approaches to them. These challenges included designing a system which office principals would find useful and would directly use themselves. Ultimately, the system, called the Speech Filing System (SFS), became primarily a voice store and forward message system with which users compose, edit, send, and

John D. Gould; Stephen J. Boies

1983-01-01

152

Disk File Management in a Medium-Scale Time-Sharing System.  

ERIC Educational Resources Information Center

|The paper descibes a compact and highly efficient disk file management system responsible for the management and allocation of space on moving head disk drives in a medium-scale time-sharing system. The disk file management system is a major component of the Experimental Time-Sharing System (ETSS) developed at the Learning Research and…

Fitzhugh, Robert J.; Pethia, Richard D.

153

Name space consistency in the Pangaea wide-area file system  

Microsoft Academic Search

Pangaea is a wide-area file system that enables ad-hoc collabo- ration in multi-national corporations or in distributed groups of users. This paper describes Pangaea's approach for keeping the file-system's name space consistent and proves its correctness. Maintaining the name space is a simple matter in traditional file systems that store the entire volume in a single node. It is not

Yasushi Saito; Christos Karamanolis

154

GMount: An Ad Hoc and Locality-Aware Distributed File System by Using SSH and FUSE  

Microsoft Academic Search

Developing and deploying distributed file system has been important for the Grid computing. By GMount, non-privileged users can instantaneously and effortlessly build a distributed file system on arbitrary machines that are reachable via SSH. It is scalable to hundreds of nodes in the wide-area Grid environments and adapts to NAT\\/Firewall. Unlike conventional distributed file systems, GMount can directly harness local

Nan Dun; Kenjiro Taura; Akinori Yonezawa

2009-01-01

155

Improvements to the Modernized e-File System Will Help Provide Intended Benefits to the Internal Revenue Service and Taxpayers.  

National Technical Information Service (NTIS)

The Modernized e-File system is a replacement of the current Internal Revenue Service (IRS) tax return filing technology with a modernized, Internet-based electronic filing platform. The Modernized e-File system supports and facilitates the IRS commitment...

2008-01-01

156

An efficient file system for large-capacity storage with multiple NAND flash memories  

Microsoft Academic Search

This paper suggests various schemes for a file system which is suitable for large-capacity storage with multiple NAND flash memories. The file system can be adopted by multimedia devices which require light non-volatile large storage. I. INTRODUCTION Since multimedia services utilize a large volume of files, multimedia devices are usually equipped with large-capacity hard disks. Their primary concerns are high

Sang Oh Park; Sung Jo Kim

2011-01-01

157

Soft updates: a solution to the metadata update problem in file systems  

Microsoft Academic Search

Metadata updates, such as file creation and block allocation, have consistently been identified as a source of performance, integrity, security, and availability problems for file systems. Soft updates is an implementation technique for low-cost sequencing of fine-grained updates to write-back cache blocks. Using soft updates to track and enforce metadata update dependencies, a file system can safely use delayed writes

Gregory R. Ganger; Marshall Kirk McKusick; Craig A. N. Soules; Yale N. Patt

2000-01-01

158

Organizing File Archives in Large Scale Distributed Systems  

Microsoft Academic Search

On the background of the constantly growing size and complexity of international networks the organization of public or file archives and archive arrays is getting more and more impor - tant. Based on statistical data of a selected Internet anonymous FTP archive, this study deals with some current problems of file archives in wide area networks. It presents mechanisms and

Martin A. Blatter

159

The Naval Aviation Supply Office Inventory Retrieval SystemA Case Study in File Automation  

Microsoft Academic Search

This article describes the case history of the pilot mechanization of files at the Naval Aviation Supply Office. The system described retrieves information on a real-time basis from a large file of technical and inventory data stored on magnetic disk memory. A feature of the system is the use of the Multi-List technique which stores an addressing index in the

Barry Zimmerman; David Lefkovitz; Noah S. Prywes

1964-01-01

160

Service Interface and Replica Management Algorithm for Mobile File System Clients  

Microsoft Academic Search

Portable computers are now common, a fact thatraises the possibility that file service clients might moveon a regular basis. This new development requires rethinkingsome features of distributed file system design.We argue that existing approaches to file replica managementwould not cope well with the likely behaviorof mobile clients, and we present our solution: a lazy"server-based" update operation. This operation facilitatesfast, scalable,

Carl D. Tait; Dan Duchamp

1991-01-01

161

Efficient structured data access in parallel file systems.  

SciTech Connect

Parallel scientific applications store and retrieve very large, structured datasets. Directly supporting these structured accesses is an important step in providing high-performance I/O solutions for these applications. High-level interfaces such as HDF5 and Parallel netCDF provide convenient APIs for accessing structured datasets, and the MPI-IO interface also supports efficient access to structured data. However, parallel ?le systems do not traditionally support such access. In this work we present an implementation of structured data access support in the context of the Parallel Virtual File System (PVFS). We call this support 'datatype I/O' because of its similarity to MPI datatypes. This support is built by using a reusable datatype-processing component from the MPICH2 MPI implementation. We describe how this component is leveraged to efficiently process structured data representations resulting from MPI-IO operations. We quantitatively assess the solution using three test applications. We also point to further optimizations in the processing path that could be leveraged for even more efficient operation.

Ching, A.; Choudhary, A.; Liao, W.-K.; Ross, R.; Gropp, W.; Mathematics and Computer Science; Northwestern Univ.

2003-01-01

162

76 FR 2049 - Suspension of the Duty To File Reports for Classes of Asset-Backed Securities Under Section 15(d...  

Federal Register 2010, 2011, 2012, 2013

...240 and 249 [Release No. 34-63652; File No. S7-02-11] RIN 3235-AK89 Suspension of the Duty To File Reports for Classes of Asset- Backed Securities...the automatic suspension of the duty to file under Section 15(d) of the...

2011-01-12

163

76 FR 52549 - Suspension of the Duty To File Reports for Classes of Asset-Backed Securities Under Section 15(D...  

Federal Register 2010, 2011, 2012, 2013

...240 and 249 [Release No. 34-65148; File No. S7-02-11] RIN 3235-AK89 Suspension of the Duty To File Reports for Classes of Asset- Backed Securities...the automatic suspension of the duty to file under Section 15(d) of the...

2011-08-23

164

Evaluating the Shared Root File System Approach for Diskless High-Performance Computing Systems  

SciTech Connect

Diskless high-performance computing (HPC) systems utilizing networked storage have become popular in the last several years. Removing disk drives significantly increases compute node reliability as they are known to be a major source of failures. Furthermore, networked storage solutions utilizing parallel I/O and replication are able to provide increased scalability and availability. Reducing a compute node to processor(s), memory and network interface(s) greatly reduces its physical size, which in turn allows for large-scale dense HPC solutions. However, one major obstacle is the requirement by certain operating systems (OSs), such as Linux, for a root file system. While one solution is to remove this requirement from the OS, another is to share the root file system over the networked storage. This paper evaluates three networked file system solutions, NFSv4, Lustre and PVFS2, with respect to their performance, scalability, and availability features for servicing a common root file system in a diskless HPC configuration. Our findings indicate that Lustre is a viable solution as it meets both, scaling and performance requirements. However, certain availability issues regarding single points of failure and control need to be considered.

Engelmann, Christian [ORNL; Ong, Hong Hoe [ORNL; Scott, Stephen L [ORNL

2009-01-01

165

Comparison of Canal Transportation and Centering Ability of Twisted Files, Pathfile-ProTaper System, and Stainless Steel Hand K-Files by Using Computed Tomography  

Microsoft Academic Search

IntroductionThe purpose of this study was to compare canal transportation and centering ability of 2 rotary nickel-titanium (NiTi) systems (Twisted Files [TF] and Pathfile-ProTaper [PP]) with conventional stainless steel K-files.

Richard Gergi; Joe Abou Rjeily; Joseph Sader; Alfred Naaman

2010-01-01

166

A novel approach for a file-system integrity monitor tool of Xen virtual machine  

Microsoft Academic Search

File-system integrity tools (FIT) are commonly deployed host-based intrusion detections (HIDS) tool to detect unauthorized file-system changes. While FIT are widely used, this kind of HIDS has many drawbacks: the intrusion detection is not done in real-time manner, which might render the whole scheme useless if the attacker can somehow take over the system with privileged access in the time

Anh-quynh Nguyen; Yoshiyasu Takefuji

2007-01-01

167

Melting Pot XML: Bringing File Systems and Databases One Step Closer  

Microsoft Academic Search

Ever-growing data volumes demand for storage systems beyond current file systems abilities, particularly, a powerful querying capability. With the rise of XML, the database community has been challenged by semi-structured data processing, en- hancing their field of activity. Since file systems are structured hierarchically they can be mapped to XML and as such stored in and queried by an XML-aware

Alexander Holupirek; Christian Grün; Marc H. Scholl

2007-01-01

168

26 CFR 1.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Required use of magnetic media for returns by organizations required...1.6033-4 Required use of magnetic media for returns by organizations required...that is required to be filed on magnetic media under § 301.6033-4 of this...

2013-04-01

169

75 FR 29312 - Notice Regarding the Elimination of the Fee for Petitions To Make Special Filed Under the Patent...  

Federal Register 2010, 2011, 2012, 2013

...www.uspto.gov/patents/init_events/pph/index.jsp. Until now, the PPH notices have indicated that a request for...www.uspto.gov/patents/init_events/pph/index.jsp. Under the PPH program, if an application filed in an...

2010-05-25

170

26 CFR 301.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Required use of magnetic media for returns by organizations required... § 301.6033-4 Required use of magnetic media for returns by organizations required...to file returns under section 6033 on magnetic media. An organization required...

2009-04-01

171

26 CFR 301.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Required use of magnetic media for returns by organizations required... § 301.6033-4 Required use of magnetic media for returns by organizations required...to file returns under section 6033 on magnetic media. An organization required...

2010-04-01

172

NVFAT: A FAT-Compatible File System with NVRAM Write Cache for Its Metadata  

NASA Astrophysics Data System (ADS)

File systems make use of the buffer cache to enhance their performance. Traditionally, part of DRAM, which is volatile memory, is used as the buffer cache. In this paper, we consider the use of of Non-Volatile RAM (NVRAM) as a write cache for metadata of the file system in embedded systems. NVRAM is a state-of-the-art memory that provides characteristics of both non-volatility and random byte addressability. By employing NVRAM as a write cache for dirty metadata, we retain the same integrity of a file system that always synchronously writes its metadata to storage, while at the same time improving file system performance to the level of a file system that always writes asynchronously. To show quantitative results, we developed an embedded board with NVRAM and modify the VFAT file system provided in Linux 2.6.11 to accommodate the NVRAM write cache. We performed a wide range of experiments on this platform for various synthetic and realistic workloads. The results show that substantial reductions in execution time are possible from an application viewpoint. Another consequence of the write cache is its benefits at the FTL layer, leading to improved wear leveling of Flash memory and increased energy savings, which are important measures in embedded systems. From the real numbers obtained through our experiments, we show that wear leveling is improved considerably and also quantify the improvements in terms of energy.

Doh, In Hwan; Lee, Hyo J.; Moon, Young Je; Kim, Eunsam; Choi, Jongmoo; Lee, Donghee; Noh, Sam H.

173

Single file and normal dual mode diffusion in highly confined hard sphere mixtures under flow.  

PubMed

We use Monte Carlo simulations to study the dual-mode diffusion regime of binary and tertiary mixtures of hard spheres confined in narrow cylindrical pores under the influence of an imposed flow. The flow is introduced to the dynamics by adding a small bias directed along the long axis of the pore to the random displacement of each Monte Carlo move. As a result, the motion of the particles in all the components is dominated by a drift velocity that causes the mean squared displacements to increase quadratically in the long time limit. However, an analysis of the mean squared displacements at intermediate time scales shows that components of the mixture above and below their passing thresholds still exhibit behaviors consistent with normal and single-file diffusion, respectively. The difference between the mean squared displacements of the various components is shown to go though a maximum, suggesting there may be an optimal pore diameter for the separation of mixtures exhibiting dual-mode diffusion. PMID:22979868

Wanasundara, Surajith N; Spiteri, Raymond J; Bowles, Richard K

2012-09-14

174

Using Hadoop File System and MapReduce in a small/medium Grid site  

NASA Astrophysics Data System (ADS)

Data storage and data access represent the key of CPU-intensive and data-intensive high performance Grid computing. Hadoop is an open-source data processing framework that includes fault-tolerant and scalable distributed data processing model and execution environment, named MapReduce, and distributed File System, named Hadoop distributed File System (HDFS). HDFS was deployed and tested within the Open Science Grid (OSG) middleware stack. Efforts have been taken to integrate HDFS with gLite middleware. We have tested the File System thoroughly in order to understand its scalability and fault-tolerance while dealing with small/medium site environment constraints. To benefit entirely from this File System, we made it working in conjunction with Hadoop Job scheduler to optimize the executions of the local physics analysis workflows. The performance of the analysis jobs which used such architecture seems to be promising, making it useful to follow up in the future.

Riahi, H.; Donvito, G.; Fanò, L.; Fasi, M.; Marzulli, G.; Spiga, D.; Valentini, A.

2012-12-01

175

PicFS: The Privacy-Enhancing Image-Based Collaborative File System  

Microsoft Academic Search

Cloud computing makes available a vast amount of computation and storage resources in the pay-as-you-go manner. However, the users of cloud storage have to trust the providers to ensure the data privacy and confidentiality. In this paper, we present the Privacy-enhancing Image-based Collaborative File System (PicFS), a network file system that steganographically encodes itself into images and provides anonymous uploads

Chris Sosa; Blake C. Sutton; H. Howie Huang

2010-01-01

176

Towards a High Performance Implementation of MPI-IO on the Lustre File System  

Microsoft Academic Search

Lustre is becoming an increasingly important file system for large-scale computing clusters. The problem is that many data- intensive applications use MPI-IO for their I\\/O requirements, and it has been well documented that MPI-IO performs poorly in a Lustre file system environment. However, the reasons for such poor performance are not currently well understood. We believe that the primary reason

Phillip M. Dickens; Jeremy Logan

2008-01-01

177

Towards an understanding of the performance of MPI-IO in Lustre file systems  

Microsoft Academic Search

Lustre is becoming an increasingly important file system for large-scale computing clusters. The problem, however, is that many data-intensive applications use MPI-IO for their I\\/O requirements, and MPI-IO performs poorly in a Lustre file system environment. While this poor performance has been well documented, the reasons for such performance are currently not well understood. Our research suggests that the primary

Jeremy Logan; Phillip M. Dickens

2008-01-01

178

A Cost-intelligent Application-specific Data Layout Scheme for Parallel File Systems  

Microsoft Academic Search

I\\/O data access is a recognized performance bottleneck of high-end computing. Several commercial and research parallel file systems have been developed in recent years to ease the performance bot- tleneck. These advanced file systems perform well on some appli- cations but may not perform well on others. They have not reached their full potential in mitigating the I\\/O-wall problem. Data

Huaiming Song; Yanlong Yin; Yong Chen; Xian-He Sun

2011-01-01

179

The Fifth Workshop on HPC Best Practices: File Systems and Archives  

SciTech Connect

The workshop on High Performance Computing (HPC) Best Practices on File Systems and Archives was the fifth in a series sponsored jointly by the Department Of Energy (DOE) Office of Science and DOE National Nuclear Security Administration. The workshop gathered technical and management experts for operations of HPC file systems and archives from around the world. Attendees identified and discussed best practices in use at their facilities, and documented findings for the DOE and HPC community in this report.

Hick, Jason; Hules, John; Uselton, Andrew

2011-11-30

180

28 CFR 801.1 - Claims filed under the Federal Tort Claims Act.  

Code of Federal Regulations, 2013 CFR

...describe specific procedures to follow when filing a claim with the Court Services and Offender Supervision Agency for the District of Columbia (âCSOSAâ) or the District of Columbia Pretrial Services Agency...

2013-07-01

181

Generating configuration for missing traffic detector and security measures in industrial control systems based on the system description files  

Microsoft Academic Search

Nowadays, industrial control systems operators are trying to fulfill requirements from upcoming standards and regulation regarding cyber security issues. However, addressing such security requirements by implementing security measures is not a trivial task. Moreover, the creation and maintenance of the configuration for the security measures is prone to error. This research shows that it is possible to derive configuration file(s)

H. Hadeli; R. Schierholz; M. Braendle; C. Tuduce

2009-01-01

182

76 FR 70651 - Fee for Filing a Patent Application Other Than by the Electronic Filing System  

Federal Register 2010, 2011, 2012, 2013

...for a small entity) for any Patent Cooperation Treaty (PCT...consider this subject matter to be patent-eligible, and the color...i.e., non-reissue) patent, except for a design, plant...neither a regulatory flexibility analysis nor a certification under...

2011-11-15

183

The global unified parallel file system (GUPFS) project: FY 2002 activities and results  

SciTech Connect

The Global Unified Parallel File System (GUPFS) project is a multiple-phase, five-year project at the National Energy Research Scientific Computing (NERSC) Center to provide a scalable, high performance, high bandwidth, shared file system for all the NERSC production computing and support systems. The primary purpose of the GUPFS project is to make it easier to conduct advanced scientific research using the NERSC systems. This is to be accomplished through the use of a shared file system providing a unified file namespace, operating on consolidated shared storage that is directly accessed by all the NERSC production computing and support systems. During its first year, FY 2002, the GUPFS project focused on identifying, testing, and evaluating existing and emerging shared/cluster file system, SAN fabric, and storage technologies; identifying NERSC user input/output (I/O) requirements, methods, and mechanisms; and developing appropriate benchmarking methodologies and benchmark codes for a parallel environment. This report presents the activities and progress of the GUPFS project during its first year, the results of the evaluations conducted, and plans for near-term and longer-term investigations.

Butler, Gregory F.; Lee, Rei Chi; Welcome, Michael L.

2003-04-07

184

HUSH, An Automated Multipurpose Periodical System or From Rotary File to Computer  

Microsoft Academic Search

A computerized serials management system designed for a medium-sized academic library is running interactively on VAX-11\\/780 computer at Western Carolina University. Replacing manual files, this system is of benefit to library patrons through improved services and to library staff in providing more flexible information. Features of this locally-designed system are described by the authors.

Larry Morton; Mary Youmans

1985-01-01

185

LLNL's Parallel I/O Testing Tools and Techniques for ASC Parallel File Systems  

SciTech Connect

Livermore Computing is an early and aggressive adopter of parallel file systems including, for example, GPFS from IBM and Lustre for our present Linux systems. As such, we have acquired more than our share of battle scars from encountering bugs in 'bleeding edge' file systems that we have pressed into production to serve our customers' massive I/O requirements. A major role of the Scalable I/O Project is to detect errors before our end users do. In order to do this, we have developed highly parallel test codes to stress and probe potentially weak areas of file system behavior. This paper describes those test programs and how we make use of them.

Loewe, W E; Hedges, R M; McLarty, T T; Morrone, C J

2004-04-08

186

High performance file compression algorithm for video-on-demand e-learning system  

NASA Astrophysics Data System (ADS)

Information processing and communication technology are progressing quickly, and are prevailing throughout various technological fields. Therefore, the development of such technology should respond to the needs for improvement of quality in the e-learning education system. The authors propose a new video-image compression processing system that ingeniously employs the features of the lecturing scene: recognizing the a lecturer and a lecture stick by pattern recognition techniques, the video-image compression processing system deletes the figure of a lecturer of low importance and displays only the end point of a lecture stick. It enables us to create the highly compressed lecture video files, which are suitable for the Internet distribution. We compare this technique with the other simple methods such as the lower frame-rate video files, and the ordinary MPEG files. The experimental result shows that the proposed compression processing system is much more effective than the others.

Nomura, Yoshihiko; Matsuda, Ryutaro; Sakamoto, Ryota; Sugiura, Tokuhiro; Matsui, Hirokazu; Kato, Norihiko

2005-10-01

187

Dynamic I\\/O Reconfiguration for a NFS-Based Parallel File System  

Microsoft Academic Search

The large gap between the speed in which data can be processed and the performance of I\\/O devices makes the shared storage infrastructure of a cluster a great bottle- neck. Parallel File Systems try to smooth such difference by distributing data onto several servers, increasing the system's available bandwidth. However, most implementations use a fixed number of I\\/O servers, defined

Rodrigo Kassick; Francieli Zanon Boito; Philippe Olivier Alexandre Navaux

2011-01-01

188

LLNL's Parallel I/O Testing Tools and Techniques for ASC Parallel File Systems.  

National Technical Information Service (NTIS)

Livermore Computing is an early and aggressive adopter of parallel file systems including, for example, GPFS from IBM and Lustre for our present Linux systems. As such, we have acquired more than our share of battle scars from encountering bugs in 'bleedi...

W. E. Loewe R. M. Hedges T. T. McLarty C. J. Morrone

2004-01-01

189

Replication-Based Highly Available Metadata Management for Cluster File Systems  

Microsoft Academic Search

In cluster file systems, the metadata management is critical to the whole system. Past researches mainly focus on journaling which alone is not enough to provide high-available metadata service. Some others try to use replication, but the extra latency accompanied is a main problem. To guarantee both availability and efficiency, we propose a mechanism for building highly available metadata servers

Zhuan Chen; Jin Xiong; Dan Meng

2010-01-01

190

Taming aggressive replication in the Pangaea wide-area file system  

Microsoft Academic Search

Pangaea is a wide-area file system that supports data sharing among a community of widely distributed users. It is built on a symmetrically decentralized infrastructure that consists of commodity computers provided by the end users. Computers act autonomously to serve data to their local users. When possible, they exchange data with nearby peers to improve the system's overall performance, availability,

Yasushi Saito; Christos T. Karamanolis; Magnus Karlsson; Mallik Mahalingam

2002-01-01

191

NADIR: A prototype system for detecting network and file system abuse  

SciTech Connect

This paper describes the design of a prototype computer misuse detection system for the Los Alamos Notional Laboratory`s Integrated Computing Network (ICN). This automated expert system, the Network Anomaly Detection and Intrusion Reporter (NADIR), streamlines and supplements the manual audit record review traditionally performed by security auditors. NADIR compares network activity, as summarized in weekly profiles of individual users and the ICN as a whole, against expert rules that define security policy, improper or suspicious behavior, and normal user activity. NADIR reports suspicious behavior to security auditors and provides tools to aid in follow-up investigations. This paper describes analysis by NADIR of two types of ICN activity: user authentication and access control, and mass file storage. It highlights system design issues of data handling, exploiting existing auditing systems, and performing audit analysis at the network level.

Hochberg, J.G.; Jackson, K.A.; Stallings, C.A.; McClary, J.F.; DuBois, D.H.; Ford, J.R.

1992-10-01

192

NADIR: A prototype system for detecting network and file system abuse  

SciTech Connect

This paper describes the design of a prototype computer misuse detection system for the Los Alamos Notional Laboratory's Integrated Computing Network (ICN). This automated expert system, the Network Anomaly Detection and Intrusion Reporter (NADIR), streamlines and supplements the manual audit record review traditionally performed by security auditors. NADIR compares network activity, as summarized in weekly profiles of individual users and the ICN as a whole, against expert rules that define security policy, improper or suspicious behavior, and normal user activity. NADIR reports suspicious behavior to security auditors and provides tools to aid in follow-up investigations. This paper describes analysis by NADIR of two types of ICN activity: user authentication and access control, and mass file storage. It highlights system design issues of data handling, exploiting existing auditing systems, and performing audit analysis at the network level.

Hochberg, J.G.; Jackson, K.A.; Stallings, C.A.; McClary, J.F.; DuBois, D.H.; Ford, J.R.

1992-01-01

193

Extending the POSIX I/O interface: a parallel file system perspective.  

SciTech Connect

The POSIX interface does not lend itself well to enabling good performance for high-end applications. Extensions are needed in the POSIX I/O interface so that high-concurrency HPC applications running on top of parallel file systems perform well. This paper presents the rationale, design, and evaluation of a reference implementation of a subset of the POSIX I/O interfaces on a widely used parallel file system (PVFS) on clusters. Experimental results on a set of micro-benchmarks confirm that the extensions to the POSIX interface greatly improve scalability and performance.

Vilayannur, M.; Lang, S.; Ross, R.; Klundt, R.; Ward, L.; Mathematics and Computer Science; VMWare, Inc.; SNL

2008-12-11

194

77 FR 7141 - Combined Notice of Filings #2  

Federal Register 2010, 2011, 2012, 2013

...Independent System Operator Corporation submits tariff filing per 35.13(a)(2)(iii: 2012-02-03 Att B--Marked Tariff MSG Enhancements.pdf to be effective 4/4/2012 under ER12-992. Filing Type: 10. Filed Date: 2/3/12. Accession...

2012-02-10

195

Permit Compliance System (PCS) facility address and permit file EPA region 9 (AZ, CA, HI, NV, American Samoa, Guam) (for microcomputers). Data file  

SciTech Connect

The Permit Compliance System (PCS) is an EPA national computerized management information system that records water-discharge permit data on more than 64,000 wastewater treatment facilities nationwide. This system automates entry, updating, and retrieval of National Pollutant Discharge Elimination System (NPDES) data and tracks permit issuance, permit limits, monitoring data, and other data pertaining to facilities regulated under NPDES. There are approximately 49,000 industrial facilities and 15,000 municipal facilities regulated by NPDES. The Enforcement Action File contains information regarding actions taken in the most recent 2-year period, in response to violations of effluent parameters limits, non-receipt of Discharge Monitoring Reports (DMRs) or Compliance Schedule reports, or failure to complete Compliance Schedule milestones for all active permitted facilities. Enforcement action data include the events in violation and the dates of occurrence, the type of enforcement action(s), and the dates they were taken, and the current status of each action. This data is updated twice a year.

NONE

1996-06-01

196

The global unified parallel file system (GUPFS) project: FY 2003 activities and results  

SciTech Connect

The Global Unified Parallel File System (GUPFS) project is a multiple-phase project at the National Energy Research Scientific Computing (NERSC) Center whose goal is to provide a scalable, high-performance, high-bandwidth, shared file system for all of the NERSC production computing and support systems. The primary purpose of the GUPFS project is to make the scientific users more productive as they conduct advanced scientific research at NERSC by simplifying the scientists' data management tasks and maximizing storage and data availability. This is to be accomplished through the use of a shared file system providing a unified file namespace, operating on consolidated shared storage that is accessible by all the NERSC production computing and support systems. In order to successfully deploy a scalable high-performance shared file system with consolidated disk storage, three major emerging technologies must be brought together: (1) shared/cluster file systems software, (2) cost-effective, high-performance storage area network (SAN) fabrics, and (3) high-performance storage devices. Although they are evolving rapidly, these emerging technologies individually are not targeted towards the needs of scientific high-performance computing (HPC). The GUPFS project is in the process of assessing these emerging technologies to determine the best combination of solutions for a center-wide shared file system, to encourage the development of these technologies in directions needed for HPC, particularly at NERSC, and to then put them into service. With the development of an evaluation methodology and benchmark suites, and with the updating of the GUPFS testbed system, the project did a substantial number of investigations and evaluations during FY 2003. The investigations and evaluations involved many vendors and products. From our evaluation of these products, we have found that most vendors and many of the products are more focused on the commercial market. Most vendors lack the understanding of, or do not have the resources to pay enough attention to, the needs of high-performance computing environments such as NERSC.

Butler, Gregory F.; Baird William P.; Lee, Rei C.; Tull, Craig E.; Welcome, Michael L.; Whitney Cary L.

2004-04-30

197

GPFS: A Shared-Disk File System for Large Computing Clusters  

Microsoft Academic Search

GPFS is IBM's parallel, shared-disk file system for cluster computers, available on the RS\\/6000 SP parallel supercomputer and on Linux clusters. GPFS is used on many of the largest supercomputers in the world. GPFS was built on many of the ideas that were developed in the academic community over the last several years, particularly distributed locking and recovery technology. To

Frank B. Schmuck; Roger L. Haskin

2002-01-01

198

Supporting Scalable and Adaptive Metadata Management in Ultralarge-Scale File Systems  

Microsoft Academic Search

This paper presents a scalable and adaptive decentralized metadata lookup scheme for ultralarge-scale file systems (more than Petabytes or even Exabytes). Our scheme logically organizes metadata servers (MDSs) into a multilayered query hierarchy and exploits grouped Bloom filters to efficiently route metadata requests to desired MDSs through the hierarchy. This metadata lookup scheme can be executed at the network or

Yu Hua; Yifeng Zhu; Hong Jiang; Dan Feng; Lei Tian

2011-01-01

199

NMR cyberinfrastructure: Web-based virtual file system for managing distributed NMR data  

Microsoft Academic Search

A key aspect of data cyberinfrastructure is the middleware for managing distributed scientific data with services for organizing, publishing and preserving data entities in a collaborative, data sharing environment. In this paper, we describe a virtual web-based file system for managing NMR (Nuclear Magnetic Resonance) data from multiple, distributed NMR spectrometers across the campus of UC San Diego. The environment

Choonhan Youn; Chaitan Baru; Anthony Mrse; Joseph M. O'Connor

2010-01-01

200

Binary authentication signatures integrity standard: System file integrity for the masses  

SciTech Connect

Thrusted software plays a central role in computer security, yet straightforward methods for authentication of installed software are lacking in the marketplace. This paper argues for a vendor-supported standard for the generation and publication of strong digital signature for all vendor-supplied system files. Progress in the design and adoption of a proposed standard is discussed.

Bartoletti, T. [Lawrence Livermore National Lab., CA (United States); Graff, M. [Sun Microsystems, Inc. (United States); Schales, D. [Texas A and M Univ., College Station, TX (United States)

1994-03-01

201

SEFS: Security Module for Extensible File System Architectures  

Microsoft Academic Search

Data security is a fundamental issue in modern com- puter systems. In particular, data storage systems are frequently subject to attacks and so need protection. Typical storage systems rely on access control mecha- nisms, either physical or logical, to prevent unautho- rized users from accessing stored data. However, such mechanisms are useless against non-ethical attitudes taken by privileged users, like

Lu ´ õs; AndreZ Ferreira

2000-01-01

202

SEFS: Security Module for Extensible File System Architectures  

Microsoft Academic Search

Data security is a fundamental issue in modern com- puter systems. In particular, data storage systems are frequently subject to attacks and so need protection. Typical storage systems rely on access control mecha- nisms, either physical or logical, to prevent unautho- rized users from accessing stored data. However, such mechanisms are useless against non-ethical attitudes taken by privileged users, like

Lu ´ is Ferreira

203

StegFS: A Steganographic File System for Linux  

Microsoft Academic Search

Cryptographic le systems provide little protection against legal or illegal instruments that force the owner of data to release de- cryption keys for stored data once the presence of encrypted data on an inspected computer has been established. We are interested in how cryp- tographic le systems can be extended to provide additional protection for such a scenario and we

Andrew D. Mcdonald; Markus G. Kuhn

1999-01-01

204

Implementing Journaling in a Linux Shared Disk File System  

Microsoft Academic Search

In computer systems today, speed and responsiveness is often determined by net- work and storage subsystem performance. Faster, more scalable networking interfaces like Fibre Channel and Gigabit Ethernet provide the scaffolding from which higher performance computer systems implementations may be constructed, but new think- ing is required about how machines interact with network-enabled storage devices. In this paper we describe

Kenneth W. Preslan; Andrew P. Barry; Jonathan Brassow; Russell Cattelan; Adam Manthei; Erling Nygaard; Seth Van Oort; David Teigland; Mike Tilstra; Matthew T. O'keefe; Grant Erickson; Manish Agarwal

2000-01-01

205

Development and Use of a Termatrex Chemical File System  

ERIC Educational Resources Information Center

|A storage and retrieval system for chemical structures, using optical coincidence, is in use at Schering Corp. The system rapidly provides the research laboratories with structural information at any generic level. The design, maintenance, costs, and applications are discussed. (4 references) (Author)|

Legatt, Theodore; And Others

1972-01-01

206

46 CFR 67.223 - Filing limitation.  

Code of Federal Regulations, 2011 CFR

...MEASUREMENT OF VESSELS DOCUMENTATION OF VESSELS Filing and Recording of Instruments-Bills of Sale and Related Instruments ...Filing limitation. An instrument presented for filing and recording under this subpart may be filed only in conjunction with...

2011-10-01

207

46 CFR 67.223 - Filing limitation.  

Code of Federal Regulations, 2012 CFR

...MEASUREMENT OF VESSELS DOCUMENTATION OF VESSELS Filing and Recording of Instruments-Bills of Sale and Related Instruments ...Filing limitation. An instrument presented for filing and recording under this subpart may be filed only in conjunction with...

2012-10-01

208

Concurrent design versioning system, based on XML file  

Microsoft Academic Search

Electrical engineers are interested in sharing knowledge with other disciplines like mechanics, thermal, etc.. Indeed, to design an electromechanical product requires more and more skills leading naturally to the concurrent design. A collaborative work, based on several exchanges (like data, expert rules, negotiations), by mainly using Internet protocols, needs dedicated supports, lighter than technical data management system and more dynamic.

Benoit Delinchant; Laurent Gerbaud; Frbdbric Wurtz; Eric Atienza

2002-01-01

209

A Methodology for the Investigation of Journaling File Systems  

Microsoft Academic Search

Cyberneticists agree that metamorphic theory are an interesting new topic in the field of robotics, and system administrators concur. After years of con- firmed research into IPv7, we show the emulation of lambda calculus, which embodies the typical princi- ples of robotics. In our research, we demonstrate that though consistent hashing and replication can coop- erate to address this obstacle,

Linus Torvalds

210

Hierarchical Replication Control in a Global File System  

Microsoft Academic Search

To meet the rigorous demands of large-scale data sharing in global collaborations, we present a replication scheme for NFSv4 that supports mutable replication without sacrificing strong consistency guarantees. Experimental evaluation indicates a substantial performance advantage over a single server system. With the introduction of a hierarchical replication control protocol, the overhead of replication is negligible even when applications mostly write

Jiaying Zhang; Peter Honeyman

2007-01-01

211

An Interposition Agent for the Legion File System  

Microsoft Academic Search

Wide-area operating systems, or grids, present users with access to a broad range of computational resources and storage facilities. To cope with the resulting heterogeneity, current solutions such as Legion operate at user level. While this provides desirable portability, lower levels of a host such as the kernel and device drivers are necessarily unaware of the middleware infrastructure. Resultingly, users

Brian S. White; Marty Humphrey; Andrew S. Grimshaw

212

A File Allocation Strategy for Energy-Efficient Disk Storage Systems  

SciTech Connect

Exponential data growth is a reality for most enterprise and scientific data centers.Improvements in price/performance and storage densities of disks have made it both easy and affordable to maintain most of the data in large disk storage farms. The provisioning of disk storage farms however, is at the expense of high energy consumption due to the large number of spinning disks. The power for spinning the disks and the associated cooling costs is a significant fraction of the total power consumption of a typical data center. Given the trend of rising global fuel and energy prices and the high rate of data growth, the challenge is to implement appropriateconfigurations of large scale disk storage systems that meet performancerequirements for information retrieval across data centers. We present part of the solution to this challenge with an energy efficient file allocation strategy on a large scale disk storage system. Given performance characteristics of thedisks, and a profile of the workload in terms of frequencies of file requests and their sizes, the basic idea is to allocate files to disks such that the disks can be configured into two sets of active (constantly spinning), and passive (capable of being spun up or down) disk pools. The goal is to minimize the number of active disks subject to I/O performance constraints. We present an algorithm for solving this problem with guaranteed bounds from the optimal solution. Our algorithm runs in O(n) time where n is the number of files allocated. It uses a mapping of our file allocation problem to a generalization of the bin packing problem known as 2-dimensional vector packing. Detailed simulation results are also provided.

Otoo, Ekow J; Otoo, Ekow J.; Rotem, Doron; Pinar, Ali; Tsao, Shi-Chiang

2008-06-27

213

43 CFR 3809.313 - Under what circumstances may I not begin operations 15 calendar days after filing my notice?  

Code of Federal Regulations, 2012 CFR

...circumstances may I not begin operations 15 calendar days after filing my notice? 3809.313...circumstances may I not begin operations 15 calendar days after filing my notice? To see when you may not begin operations 15 calendar days after filing your notice, follow...

2012-10-01

214

76 FR 46774 - Privacy Act of 1974; System of Records-Federal Student Aid Application File  

Federal Register 2010, 2011, 2012, 2013

...Records--Federal Student Aid Application File AGENCY: Federal Student Aid, Department...Federal Student Financial Aid Application File (18-11-01), 64 Federal Register...term ``Federal Student Aid Application File'' in the subject line of your...

2011-08-03

215

[Radiological reporting system developed with FileMaker-Pro: cooperation with HIS, RIS, and PACS].  

PubMed

This article briefly describes our original radiological reporting system. This system was developed with the widely used database software FileMakerPro (ver 5.5). The reporting system can obtain information about patients and examinations from a radiology information system(RIS) by the Open DataBase Connectivity(ODBC) technique. By clicking the button on the reporting system, the corresponding DICOM images can be displayed on a picture archiving and communication system(PACS) workstation monitor. Reference images in JPEG format can be easily moved from PACS to the reporting system. Reports produced by the reporting system are distributed to the hospital information system(HIS) in Portable Document Format(PDF), through another web server. By utilizing the capacity of FileMakerPro, the human-machine interface of the system has been able to be improved easily. In addition, cooperation with HIS, RIS, and PACS could be constructed. Therefore, this original system would contribute to increasing the efficiency of radiological diagnosis. PMID:15148786

Kawakami, Satoshi

2004-03-01

216

Question Answering from Frequently-Asked Question Files: Experiences with the FAQ Finder System  

Microsoft Academic Search

This paper describes FAQ Finder, a natural language question-answering system that usesfiles of frequently-asked questions as its knowledge base. Unlike AI question-answering systemsthat focus on the generation of new answers, FAQ Finder retrieves existing ones found infrequently-asked question files. Unlike information retrieval approaches that rely on a purelylexical metric of similarity between query and document, FAQ Finder uses a semantic

Robin D. Burke; Kristian J. Hammond; Vladimir Kulyukin

1996-01-01

217

U.S. Department of Energy Best Practices Workshop onFile Systems & Archives San Francisco, CA September 26-27, 2011 Position Paper  

SciTech Connect

This position paper discusses issues of usability of the large parallel file systems in the Livermore Computing Center. The primary uses of these file systems are for storage and access of data that is created during the course of a simulation running on an LC system. The Livermore Computing Center has multiple, globally mounted parallel file systems in each of its computing environments. The single biggest issue of file system usability that we have encountered through the years is to maintain continuous file system responsiveness. Given the back end storage hardware that our file systems are provisioned with, it is easily possible for a particularly I/O intensive application or one with particularly inefficiently coded I/O operations to bring the file system to an apparent halt. The practice that we will be addressing is one of having an ability to indentify, diagnose, analyze and optimize the I/O quickly and effectively.

Hedges, R M

2011-09-01

218

Standard interface file handbook  

SciTech Connect

This handbook documents many of the standard interface file formats that have been adopted by the US Department of Energy to facilitate communications between and portability of, various large reactor physics and radiation transport software packages. The emphasis is on those files needed for use of the VENTURE/PC diffusion-depletion code system. File structures, contents and some practical advice on use of the various files are provided.

Shapiro, A.; Huria, H.C. [Cincinnati Univ., OH (United States)

1992-10-01

219

Cartographic Boundary Files  

NSDL National Science Digital Library

The Cartographic Boundary Files Web site from the US Census Bureau contains "generalized extracts from the Census Bureau's TIGER geographic database for use in a Geographic Information System (GIS) or similar mapping systems." The files are mainly from the 2000 census and contain such things as Congressional Districts, School Districts, Urbanized Areas, and more. The Descriptions and Metadata link gives users an idea of what is contained in each file before downloading, and the Download Boundary Files link lists each file that can than be downloaded, all available in several formats.

2001-01-01

220

17 CFR 260.7a-8 - Effective date of amendment filed under section 8(a) of the Securities Act pursuant to order of...  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Effective date of amendment filed under section 8(a) of the Securities Act pursuant to order of Commission. 260.7a-8 Section 260.7a-8 Commodity and Securities Exchanges SECURITIES AND EXCHANGE...

2009-04-01

221

7 CFR 1.670 - How must documents be filed and served under §§ 1.670 through 1.673?  

Code of Federal Regulations, 2013 CFR

... Section 1.670 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses Alternatives Process § 1.670 How must documents be filed and served under §§ 1.670 through 1.673?...

2013-01-01

222

Statistical Disk Cluster Classification for File Carving  

Microsoft Academic Search

File carving is the process of recovering files from a disk without the help of a file system. In forensics, it is a helpful tool in finding hidden or recently removed disk content. Known signatures in file headers and footers are especially useful in carving such files out, that is, from header until footer. However, this approach assumes that file

Cor J. Veenman

2007-01-01

223

77 FR 60417 - Combined Notice of Filings #1  

Federal Register 2010, 2011, 2012, 2013

...Independent Transmission System. Description: Amend Brownton-GRE-NSP T-T to be effective 7/31/2012 under. Filed Date...Independent Transmission System. Description: Sheas Lake-GRE-NSP T-T Amendment to be effective 8/10/ 2012. Filed...

2012-10-03

224

Evaluation of clinical data in childhood asthma. Application of a computer file system  

SciTech Connect

A computer file system was used in our pediatric allergy clinic to assess the value of chest roentgenograms and hemoglobin determinations used in the examination of patients and to correlate exposure to pets and forced hot air with the severity of asthma. Among 889 children with asthma, 20.7% had abnormal chest roentgenographic findings, excluding hyperinflation and peribronchial thickening, and 0.7% had abnormal hemoglobin values. Environmental exposure to pets or forced hot air was not associated with increased severity of asthma, as assessed by five measures of outcome: number of medications administered, requirement for corticosteroids, frequency of clinic visits, frequency of emergency room visits, and frequency of hospitalizations.

Fife, D.; Twarog, F.J.; Geha, R.S.

1983-10-01

225

49 CFR 1244.6 - Retention of files.  

Code of Federal Regulations, 2011 CFR

...TRANSPORTATION OF PROPERTY-RAILROADS § 1244.6 Retention of files. (a) Subject railroads which submit waybill sample data by the computerized system instead of the manual system shall retain the underlying hard copy waybills or...

2011-10-01

226

49 CFR 1244.6 - Retention of files.  

Code of Federal Regulations, 2012 CFR

...TRANSPORTATION OF PROPERTY-RAILROADS § 1244.6 Retention of files. (a) Subject railroads which submit waybill sample data by the computerized system instead of the manual system shall retain the underlying hard copy waybills or...

2012-10-01

227

Modeling Files with Context Streams  

Microsoft Academic Search

\\u000a Files are fundamental for information storage in computer operating systems. This paper explores user and environment context\\u000a to improve personal file management. We focus on the user-oriented files in a computer operating system, which are usually\\u000a operated manually, such as document files, image and video files. We formalize the dynamics of contexts to sequential signals,\\u000a called context streams. Each context

Qunjie Qiu; Gang Pan; Shijian Li

2010-01-01

228

The Utility of File Names  

Microsoft Academic Search

For typical workloads and file naming conven- tions, the size, lifespan, read\\/write ratio, and access pattern of nearly all files in a file system are accu- rately predicted by the name given to the file when it is created. We discuss some name-related prop- erties observed in three contemporary NFS work- loads, and present a method for automatically cre- ating

Daniel Ellard; Jonathan Ledlie; Margo Seltzer

2003-01-01

229

File under Fleeting  

ERIC Educational Resources Information Center

|Archives have always had an aura of neutrality and coolness that masks the heat behind the data they record: births, marriages, crimes, wars, business dealings, genocides and deaths. Long thought of as the musty haunts of scholars with a specialized interest in the demographics of Rome or 15th-century France, archives have been seen as controlled…

Torgovnick, Marianna

2008-01-01

230

cadcVOFS: A FUSE Based File System Layer for VOSpace  

NASA Astrophysics Data System (ADS)

The CADC is now making extensive use of the VOSpace protocol for user managed storage. The VOSpace standard allows a diverse set of rich data services to be delivered to users via a simple protocol. We have recently developed the cadcVOFS, a FUSE based file-system layer for VOSpace. cadcVOFS provides a filesystem layer on-top of VOSpace so that standard Unix tools (such as ‘find’, ‘emacs’, ‘awk’ etc) can be used directly on the data objects stored in VOSpace. Once mounted the VOSpace appears as a network storage volume inside the operating system. Within the CADC Cloud Computing project (CANFAR) we have used VOSpace as the method for retrieving and storing processing inputs and products. The abstraction of storage is an important component of Cloud Computing and the high use level of our VOSpace service reflects this.

Kavelaars, J.; Dowler, P.; Jenkins, D.; Hill, N.; Damian, A.

2012-09-01

231

Converting from Traditional File Structures to Database Management Systems: A Powerful Tool for Nursing Management  

PubMed Central

Traditional data file storage methods have limitations. The data must be accessed by a written software program, and any changes require modifications to the program. Data base management systems offer more flexibility to the users without requiring programming expertise. This paper describes one application for nursing management of changing from a traditional software program to a data base management system. Patient classification data, recommended staffing, and actual staffing data were accessed, statistical summaries prepared, and monthly summary reports were provided to nurse managers by using a database package. This method offered nursing management more flexibility, and a much desired enhancement to the original data and reports which were prepared from the purchased “canned” nurse staffing package.

Abdoo, Yvonne Marie

1987-01-01

232

A Disaster-Tolerant Widely Distributed File System Using Optical Disk Libraries  

NASA Astrophysics Data System (ADS)

We have developed a disaster-tolerant widely distributed data-backup file system that uses optical disk libraries and either simple or advanced small computer system interface (SCSI) extension equipment. The latter includes a redundant arrays of inexpensive disks (RAID) function. To evaluate the basic performance of the developed system, we first used the simple SCSI extension equipment to investigate the effect of the SCSI command-queuing function used in the local SCSI target module and found that it increases the processing speed. We then examined the effect of delay due to the wide distribution and found that read/write throughput was not affected up to distances of 10 km. Next we compared the performance of the backup system using both types of SCSI extension equipment with that without extension equipment. We found that the write speed is about the same for both, but the read speed is slower with the SCSI extension when the data size exceeds 100 kB. Using the advanced equipment to distribute the data to multiple disks solved the problem of non matching read speeds to a certain extent. A backup system using the advanced equipment was applied to a database system by using a database benchmark test program.

Ueno, Masahiro; Murata, Setsuko; Iwatsu, Shigetaro; Tanabe, Takaya

1999-03-01

233

An Approach Using Parallel Architecture to Storage DICOM Images in Distributed File System  

NASA Astrophysics Data System (ADS)

Telemedicine is a very important area in medical field that is expanding daily motivated by many researchers interested in improving medical applications. In Brazil was started in 2005, in the State of Santa Catarina has a developed server called the CyclopsDCMServer, which the purpose to embrace the HDF for the manipulation of medical images (DICOM) using a distributed file system. Since then, many researches were initiated in order to seek better performance. Our approach for this server represents an additional parallel implementation in I/O operations since HDF version 5 has an essential feature for our work which supports parallel I/O, based upon the MPI paradigm. Early experiments using four parallel nodes, provide good performance when compare to the serial HDF implemented in the CyclopsDCMServer.

Soares, Tiago S.; Prado, Thiago C.; Dantas, M. A. R.; de Macedo, Douglas D. J.; Bauer, Michael A.

2012-02-01

234

Tracking Contraband Files Transmitted Using Bittorrent  

NASA Astrophysics Data System (ADS)

This paper describes a digital forensic tool that uses an FPGA-based embedded software application to identify and track contraband digital files shared using the BitTorrent protocol. The system inspects each packet on a network for a BitTorrent Handshake message, extracts the “info hash” of the file being shared, compares the hash against a list of known contraband files and, in the event of a match, adds the message to a log file for forensic analysis. Experiments demonstrate that the system is able to successfully capture and process BitTorrent Handshake messages with a probability of at least 99.0% under a network traffic load of 89.6 Mbps on a 100 Mbps network.

Schrader, Karl; Mullins, Barry; Peterson, Gilbert; Mills, Robert

235

ncBrowse: A Graphical netCDF File Browser  

NSDL National Science Digital Library

This Java application provides interactive browsing of data and metadata netCDF file formats written under a wide range of netCDF file conventions. It features flexibility in accommodating a very wide range of netCDF files, user assignment of axes, and interactive, zoomable scientific graphics displays, including a self-scaling time axis. ncBrowse can read network accessible files, and includes Distributed Ocean Data System (DODS) and OPeNDAP support. Supported for Unix, Mac and PC hardware platforms.

236

XML Files  

MedlinePLUS

... Topics Drugs & Supplements Videos & Cool Tools MedlinePlus XML Files To use the sharing features on this page, ... If you have questions about the MedlinePlus XML files, please contact us . For additional sources of MedlinePlus ...

237

Cooperative Caching: Using Remote Client Memory to Improve File System Performance  

Microsoft Academic Search

Emerging high-speed networks will allow machines to access remote data nearly as quickly as they can access local data. This trend motivates the use of cooperative caching: coordinating the file caches of many machines distributed on a LAN to form a more effective overall file cache. In this paper we examine four cooperative caching algorithms using a trace-driven simulation study.

Michael D. Dahlin; Randolph Y. Wang; Thomas E. Anderson; David A. Patterson

1994-01-01

238

Integrating a Flash file using Action Scripts in a data exchange system on the Internet  

Microsoft Academic Search

This paper proposes a modality of design for the on-line completion forms used on Web pages. The chosen example is based on the technical and educational analysis for a study application conceived in Flash programming language using the advanced level of facilities offered by ActionScript. In this approach the connection between a swf Flash file and an asp file is

R. Radescu; Adrian Dumitru

2003-01-01

239

Effect of Patency File on Transportation and Curve Straightening in Canal Preparation with ProTaper System  

PubMed Central

The aim of this ex vivo study was to evaluate the effect of using a patency file on apical transportation and curve straightening during canal instrumentation with the ProTaper rotary system. Seventy permanent mandibular first molars with mesiobuccal canals, measuring 18–23?mm in length and with a 25–40° curvature (according to the Schneider method), were selected. The working lengths were determined and the teeth were mounted and divided into two experimental groups: (A) prepared by the ProTaper system without using a patency file (n = 35) and (B) prepared by the ProTaper system using a patency file (n = 35). Radiographs taken before and after the preparation were imported into Photoshop software and the apical transportation, and curve straightening were measured. Data were analyzed using independent t-test. Partial correlation analysis was performed to evaluate the relationship between the initial curvature, transportation, and curve straightening (? = 0.05). Using a patency file during canal preparation significantly decreased both apical transportation and curve straightening (P < 0.001). There were significant relationships between the angle of curvature, transportation and curve straightening in pairs (P < 0.001). Apical patency is recommended during root canal preparation with the ProTaper rotary system.

Hasheminia, Seyed Mohsen

2013-01-01

240

Parallel File System Testing for the Lunatic Fringe: The Care and Feeding of Restless I\\/O Power Users  

Microsoft Academic Search

Over the last several years there has been a major thrust at the Lawrence Livermore National Laboratory toward building extremely large scale computing clusters based on open source software and commodity hardware. On the storage front, our efforts have focused upon the development of the Lustre file system and bringing it into production in our computer center. Given our customers'

Richard Hedges; Bill Loewe; Tyce Mclarty; Chris Morrone

2005-01-01

241

Effect of Patency File on Transportation and Curve Straightening in Canal Preparation with ProTaper System.  

PubMed

The aim of this ex vivo study was to evaluate the effect of using a patency file on apical transportation and curve straightening during canal instrumentation with the ProTaper rotary system. Seventy permanent mandibular first molars with mesiobuccal canals, measuring 18-23?mm in length and with a 25-40° curvature (according to the Schneider method), were selected. The working lengths were determined and the teeth were mounted and divided into two experimental groups: (A) prepared by the ProTaper system without using a patency file (n = 35) and (B) prepared by the ProTaper system using a patency file (n = 35). Radiographs taken before and after the preparation were imported into Photoshop software and the apical transportation, and curve straightening were measured. Data were analyzed using independent t-test. Partial correlation analysis was performed to evaluate the relationship between the initial curvature, transportation, and curve straightening (? = 0.05). Using a patency file during canal preparation significantly decreased both apical transportation and curve straightening (P < 0.001). There were significant relationships between the angle of curvature, transportation and curve straightening in pairs (P < 0.001). Apical patency is recommended during root canal preparation with the ProTaper rotary system. PMID:24159390

Hasheminia, Seyed Mohsen; Farhadi, Nastaran; Shokraneh, Ali

2013-09-12

242

Power system expansion planning under uncertainty  

SciTech Connect

This paper describes a methodology for expansion planning of power systems under several uncertainty factors such as demand growth, fuel cost, delay in project completion, financial constraints etc. The solution approach is based on stochastic optimization techniques, decision analysis, and multiobjective tradeoff analysis. Case studies with the Brazilian system are presented and discussed.

Gorenstin, B.G.; Campodonico, N.M.; Costa, J.P.; Pereira, M.V.F. (Cepel, Rio de Janeiro (Brazil). Centro de Pesquisas de Energia Electrica)

1993-02-01

243

Budget and Budget Title Files, FY93 (United States Government). Budget Preparation System. 1993 Budget Tape Documentation. System Documentation.  

National Technical Information Service (NTIS)

The FY 1993 Budget Tape Documentation describes the structure and content of the BPS tape master files (MAT, RAT, and BPS). The tapes contain sequential versions of the on-line VSAM files. The tapes also contain a report file containing the Historical Tab...

1992-01-01

244

Guideline for Drug Master Files (DMF)  

Center for Drug Evaluation (CDER)

... The agency's system for filing DMF's provides for assembly ... A. Policies Related to Processing Drug Master Files. ... from the Drug Master File Staff, and ... More results from www.fda.gov/drugs/developmentapprovalprocess/formssubmissionrequirements

245

48 CFR 4.802 - Contract files.  

Code of Federal Regulations, 2012 CFR

...Acquisition Regulations System FEDERAL ACQUISITION REGULATION GENERAL ...ADMINISTRATIVE MATTERS Government Contract Files...with agency regulations for file location...information as defined in 2.101 must...files in any medium (paper,...

2012-10-01

246

File recovering from YAFFS2 based on object headers and metadata  

NASA Astrophysics Data System (ADS)

With the popularity of the mobile devices, flash memories have drawn much attention of investigators. In this paper, a method to recover deleted files from YAFFS2 file system was proposed. The YAFFS2 tags stored in spare area of flash and the object header of each files provide a lot of opportunities for investigators, thus were used to find and reassemble all the original files. The simulated experiment results under Linux operating system showed that the proposed method could recover the deleted files as long as they are still on the flash.

Yang, Xue; Xu, Ming; Zhang, Haiping

2013-03-01

247

WSSL: the Workstation Software System under Linux  

NASA Astrophysics Data System (ADS)

Workstation Software System is the control software of the Galileo Galilei Telescope. Developed more than 10 years ago for HP workstation, it needs now a general refurbishment to adopt the new hardware and software technologies. This paper will describe the development of this project from the linux operative system choices to the actual status of mixed control system passing throw a prototype realized under linux \\citep{Caproni:2002}.

Caproni, A.

248

File Structure Analysis.  

National Technical Information Service (NTIS)

The report investigates the critical issues in the design of a multi-user interactive retrieval system. Alternative designs for file management and interlock handling in time-sharing systems are also discussed. (Author)

H. Saint M. Bell R. I. Maurice R. M. Shapiro

1972-01-01

249

29 CFR 1602.43 - Commission's remedy for school systems' or districts' failure to file report.  

Code of Federal Regulations, 2013 CFR

...Labor (Continued) EQUAL EMPLOYMENT OPPORTUNITY COMMISSION RECORDKEEPING AND REPORTING REQUIREMENTS UNDER TITLE VII, THE ADA AND GINA Elementary-Secondary Staff Information Report § 1602.43 Commission's remedy for school systems' or...

2013-07-01

250

Vaccine Adverse Event Reporting System (VAERS) (Historic) January 1, 2001 - December 31, 2002 (Raw Data File).  

National Technical Information Service (NTIS)

This data set contains information releasable under the Freedom of Information Act (FOIA) from reports submitted to the Vaccine Adverse Event Reporting System (VAERS). The National Childhood Vaccine Injury Act of 1986 (NCVIA) requires health care provider...

2002-01-01

251

Interactive Radiology teaching file system: the development of a MIRC-compliant and user-centered e-learning resource.  

PubMed

Radiology teaching usually employs a systematic and comprehensive set of medical images and related information. Databases with representative radiological images and documents are highly desirable and widely used in Radiology teaching programs. Currently, computer-based teaching file systems are widely used in Medicine and Radiology teaching as an educational resource. This work addresses a user-centered radiology electronic teaching file system as an instance of MIRC compliant medical image database. Such as a digital library, the clinical cases are available to access by using a web browser. The system has offered great opportunities to some Radiology residents interact with experts. This has been done by applying user-centered techniques and creating usage context-based tools in order to make available an interactive system. PMID:23367264

dos-Santos, M; Fujino, A

2012-01-01

252

Performance and Reliability Enhancement for File Systems with Non-Volatile RAM over Solid-State Drives  

Microsoft Academic Search

This work is motivated by a strong demand in the reliabil- ity and performance enhancement of file systems in battery- backed embedded systems that adopt solid-state drives as their storage devices. In this paper, we consider the use of non-volatile RAM (NVRAM) in the cache design due to its non-volatility and random byte addressability. A migration- based caching strategy is

Cheng-Kang Hsieh; Yuan-Hao Chang; Che-Wei Chang; Tei-Wei Kuo

253

Civilian Radioactive Waste Management System Management and Operating Contractor. Environmental Baseline File for National Transportation.  

National Technical Information Service (NTIS)

This Environmental Baseline File summarizes and consolidates information related to the national-level transportation of commercial spent nuclear fuel. Topics addressed include: shipments of commercial spent nuclear fuel based on mostly truck and mostly r...

1999-01-01

254

On Distributed Computing Systems Reliability Analysis Under Program Execution Constraints  

Microsoft Academic Search

Presents an algorithm for computing the reliability of distributed computing systems (DCS). The algorithm, called the Fast Reliability Evaluation Algorithm, is based on the factoring theorem employing several reliability preserving reduction techniques. The effect of file distributions, program distributions, and various topologies on reliability of the DCS is studied in detail using the proposed algorithm. Compared with existing algorithms on

Deng-jyi Chen; Min-sheng Lin

1994-01-01

255

Electronic diver (under ice) detection system  

SciTech Connect

This article describes field tests successfully conducted in the Alaskan and Canadian Arctic of the Electronic Diver (Under Ice) Detection System (EDDS). The initial impetus for this research and development was the plan by the U.S. Coast Guard to expand the use of divers in the Arctic and other cold environments. One of the possible tasks that these divers would perform was to survey the areal extent of an oil spill under land fast ice. This specific development was initiated out of concern for diver safety and effectiveness while conducting various missions. The EDDS was successfully tested in the Canadian Arctic as a part of the Dome/Canadian Marine Drilling, Ltd., experimental oil spill in April, 1980. A description of the system, its possible uses, and limitations are characterized. The EDDS is an important step forward for diver under ice safety and could be used on a submersible for similar purposes. The system was tested in an oily environment and was affected by neither diver tank air bubbles nor the oil. However, the air bubbles did adversely affect a pinger type system designed to perform similar functions. Although the system performed as planned, further work is needed to optimize its performance and size.

McKindra, C.D.; Dunton, K.H.

1983-01-01

256

37 CFR 201.34 - Procedures for filing Correction Notices of Intent to Enforce a Copyright Restored under the...  

Code of Federal Regulations, 2010 CFR

...Enforce a Copyright Restored under the Uruguay Round Agreements Act. 201.34 Section...Enforce a Copyright Restored under the Uruguay Round Agreements Act. (a) General...Copyright (NIEs) Restored under the Uruguay Round Agreements Act of December...

2009-07-01

257

37 CFR 201.34 - Procedures for filing Correction Notices of Intent to Enforce a Copyright Restored under the...  

Code of Federal Regulations, 2010 CFR

...Enforce a Copyright Restored under the Uruguay Round Agreements Act. 201.34 Section...Enforce a Copyright Restored under the Uruguay Round Agreements Act. (a) General...Copyright (NIEs) Restored under the Uruguay Round Agreements Act of December...

2010-07-01

258

The evolution of file carving  

Microsoft Academic Search

Presents the evolution of file carving and describes in detail the techniques that are now being used to recover files without using any file system meta-data information. We show the benefits and problems that exist with current techniques. In the future, solid-state devices (SSDs) will become much more prevalent. SSDs will incorporate wear-leveling, which results in files being moved around

Anandabrata Pal; Nasir Memon

2009-01-01

259

Management of the Israeli National Water System under Uncertainty  

NASA Astrophysics Data System (ADS)

Uncertainty in our region is due to the natural variability of hydrological patterns, with recurring extended droughts, reduced average and broadening variability of recharge that seem to indicate the effect of climate change, as well as to deterioration of water quality in the natural sources, to population growth and distribution, to shifting demand patterns among consumer sectors, and to expected future regional water agreements. These factors combine to create a challenging environment in which highly stressed water resources and water systems have to be developed, operated and managed. The natural sources have been used to their sustainable capacity and often beyond. The main policy responses are a shift of fresh water from agriculture to the cities, replacing it with treated wastewater for irrigation, and a major program for construction of sea-water desalination plants and the associated infrastructure needed for its integration into the supply systems. Organizational reforms, regulation, and demand management options are also being developed, including full-cost pricing. Management of the water resources and systems under these conditions requires a long-term perspective. The methodologies for supporting management decisions that have been used to date by the Israeli Water Authority include evaluation by scenarios, simulation, and optimization with sensitivity analysis. We review existing approaches and models for management of the Israeli water system (Zaide 2006) and then present some new methodologies for addressing operational decisions under hydrological uncertainty, which include generation of tradeoffs between the expected value and variability of the outcomes, and an Info-Gap (Ben-Haim 2006) based approach. These methodologies are demonstrated on examples that emulate portions of a regional water system and are then applied to the Israeli National Water System. Ben-Haim, Y. (2006) Info-Gap Theory: Decisions under Severe Uncertainty, 2nd Ed., Academic Press, London. Zaide, M. (2006) A Model for Management of Water Quantity and Quality in the Israeli National System", MSc Thesis, Faculty of Civil Engineering, Technion. http://urishamir.wri.technion.ac.il/files/documents/Miki%20Zaide%20-%20Thesis%20Final%2015.03.06.pdf

Shamir, U.; Housh, M.; Ostfeld, A.; Zaide, M.

2009-12-01

260

Consolidated list of chemicals subject to reporting under the Emergency Planning and Community Right-To-Know Act: SARA (Superfund Amendments and Reauthorization Act of 1986) Section 302 Extremely Hazardous Substances, CERCLA (Comprehensive Environmental Response, Compensation, and Liability Act) Hazardous Substances and SARA Section 313 Toxic Chemicals (Title III. List of Lists) (for microcomputers). Data file  

SciTech Connect

The data file is the disk-based version of the Office of Toxic Substances' consolidated list of chemicals subject to reporting under Title III of the Superfund Amendments and Reauthorization Act of 1986 (SARA) and SARA Section 302 Extremely Hazardous Substances, as well as CERCLA Hazardous Substances. Title III is also known as the Emergency Planning and Community Right to Know Act. The disks are designed to generate either a printout or a dBase III file from any IBM or IBM compatible system.

Sykes, H.

1990-01-01

261

User-Level Code Reference Guide for the ARMS (Army Retrieval Microform System) Monthly AMDF (Army Master Data File), and I and S (Interchangeable and Substitute) History File.  

National Technical Information Service (NTIS)

The ARMS Monthly AMDF File provides users with the most commonly used supply management data, recorded on 9-track magnetic tape, to perform logistics functions relating to their assigned mission responsibilities. The guide provides instructions and guidan...

1987-01-01

262

77 FR 62226 - Privacy Act of 1974; System of Records-Principal Investigator/Application File and Associated...  

Federal Register 2010, 2011, 2012, 2013

...Principal Investigator/ Application File and Associated Records AGENCY: Institute...Sciences Principal Investigator/Application File and Associated Records'' (18-13-26...notice will cover a database and paper files containing personally identifying...

2012-10-12

263

76 FR 9780 - Notification of Deletion of System of Records; EPA Parking Control Office File (EPA-10) and EPA...  

Federal Register 2010, 2011, 2012, 2013

...of Records; EPA Parking Control Office File (EPA-10) and EPA Transit and Guaranteed Ride Home Program Files (EPA-35) AGENCY: Environmental Protection...records for EPA Parking Control Office File (EPA-10), published in the...

2011-02-22

264

ON THE ROLE OF HELPERS IN PEER-TO-PEER FILE DOWNLOAD SYSTEMS: DESIGN, ANALYSIS AND SIMULATION  

Microsoft Academic Search

While BitTorrent has been successfully used in peer- to-peer content distribution, its performance is limited by the fact that typical internet users have much lower upload bandwidths than download bandwidths. This asymmetry in bandwidth results in the overall aver- age download speed of a BitTorrent-like file down- load system to be bottle-necked by the much lower up- load capacity. This

Jiajun Wang; Chuohao Yeo; Vinod Prabhakaran; Kannan Ramchandran

265

Informatics in radiology (infoRAD): Vendor-neutral case input into a server-based digital teaching file system.  

PubMed

Although digital teaching files are important to radiology education, there are no current satisfactory solutions for export of Digital Imaging and Communications in Medicine (DICOM) images from picture archiving and communication systems (PACS) in desktop publishing format. A vendor-neutral digital teaching file, the Radiology Interesting Case Server (RadICS), offers an efficient tool for harvesting interesting cases from PACS without requiring modifications of the PACS configurations. Radiologists push imaging studies from PACS to RadICS via the standard DICOM Send process, and the RadICS server automatically converts the DICOM images into the Joint Photographic Experts Group format, a common desktop publishing format. They can then select key images and create an interesting case series at the PACS workstation. RadICS was tested successfully against multiple unmodified commercial PACS. Using RadICS, radiologists are able to harvest and author interesting cases at the point of clinical interpretation with minimal disruption in clinical work flow. PMID:17102058

Kamauu, Aaron W C; DuVall, Scott L; Robison, Reid J; Liimatta, Andrew P; Wiggins, Richard H; Avrin, David E

266

[Logetronic micro-film in radiological diagnosis with an integrated system of filming and filing(author's transl)].  

PubMed

The results of one year's routine use of primary microfilm in a large diagnostic radiological institute is reviewed. Positive views were treated by electronic contrast enhancement in an integrated system of immediate filming and filing. The resulting changes and improvements in running the department are described. This involves a fundamental reorganisation of the department, as well as equipment which is not yet commercially available. The latter had therefore to be improvised and is described. Similar procedures introduced elsewhere are critically evaluated. The advantages of immediate filming are stressed and a comparison with conventional large film filing demonstrates its financial advantages. Logical application of the method results in saving in personnel and material, but implies that the radiologist must be prepared to change to positive films in routine diagnosis. By using microfilm positives with a resolution of 4.0 pairs of lines per mm., the results equal those from large film negatives. PMID:133925

Ross, E

1976-06-01

267

75 FR 3939 - Merit Systems Protection Board (MSPB) Provides Notice of Opportunity To File Amicus Briefs  

Federal Register 2010, 2011, 2012, 2013

...notice of the opportunity to file amicus briefs in the matter of Stella Crumpler v. Department of Defense, MSPB Docket Number DC-0752-09-0033-R-1...February 16, 2010. ADDRESSES: All briefs shall be captioned ``Stella Crumpler v. Department of Defense'' and entitled...

2010-01-25

268

Operating System Support for a Video-On-Demand File Service  

Microsoft Academic Search

This paper describes the design and implementation of a continuous media file server intended for use in emerging video-on-demand applications. The main fo- cus and contribution of the paper is in scheduling and admission control algo- rithms for accessing the server's processor and storage resources. The schedul- ing algorithms support multiple classes of tasks with diverse performance requirements and allow

K. K. Ramakrishnan; Lev Vaitzblit; Cary G. Gray; Uresh Vahalia; Dennis Ting; Percy Tzelnic; Steve Glaser; Wayne Duso

1993-01-01

269

Improving Networked File System Performance Using a Locality-Aware Cooperative Cache Protocol  

Microsoft Academic Search

In a distributed environment, the utilization of file buffer caches in different clients may greatly vary. Cooperative caching has been proposed to increase cache utilization by coordinating the shared usage of distributed caches. It allows clients that would more greatly benefit from larger caches to forward data objects to peer clients with relatively underutilized caches. To support such coordination, global

Song Jiang; Xuechen Zhang; Shuang Liang; Kei Davis

2010-01-01

270

File Conversion and Transfer from a Lanier No Problem Word Processor to a Defense Logistics Agency (DLA) Distributed Minicomputer System (DMINS),  

National Technical Information Service (NTIS)

This document is about conversion and transfer of text files from a certain brand of standalone word processors to a certain minicomputer system. It describes the method used an implementation of the method, and procedures for operators of the implementat...

R. G. Thornett

1987-01-01

271

Effectiveness of a vocabulary data file, encyclopaedia, and Internet homepages in a conversation?support system for people with moderate?to?severe aphasia  

Microsoft Academic Search

Background: In order to facilitate conversation for people with moderate?to?severe aphasia, a conversation?support system has been developed. This system consists of three electronic resources: a vocabulary data file, an encyclopaedia, and homepages on the Internet. The vocabulary data file we created contains approximately 50,000 words, mostly consisting of various proper names, which are classified into 10 categories. These words function

Kiyoshi Yasuda; Tatsuya Nemoto; Keisuke Takenaka; Mami Mitachi; Kazuhiro Kuwabara

2007-01-01

272

Practical pillar design problem encountered under deep cover and with different block geometric pillar. Final open file report  

Microsoft Academic Search

This report presents a stress investigation of four coal pillars located under two depths of cover. Each coal pillar was instrumented with 10 load cells designed to measure coal pressure during initial and secondary mining. The problem considered was one of uniform triaxial stress as a large coal pillar was loaded under a thick limestone bed. Special attention was given

G. A. Hazen; H. Lewis; L. R. Artler; J. Middaugh

1975-01-01

273

28 CFR 58.7 - Procedures for Completing Uniform Forms of Trustee Final Reports in Cases Filed Under Chapters 7...  

Code of Federal Regulations, 2010 CFR

...Under Chapters 7, 12, and 13 of the Bankruptcy Code. 58.7 Section 58.7 Judicial...CONTINUED) REGULATIONS RELATING TO THE BANKRUPTCY REFORM ACTS OF 1978 AND 1994 § 58...Under Chapters 7, 12, and 13 of the Bankruptcy Code. (a) UST Form...

2010-07-01

274

28 CFR 58.7 - Procedures for Completing Uniform Forms of Trustee Final Reports in Cases Filed Under Chapters 7...  

Code of Federal Regulations, 2010 CFR

...Under Chapters 7, 12, and 13 of the Bankruptcy Code. 58.7 Section 58.7 Judicial...CONTINUED) REGULATIONS RELATING TO THE BANKRUPTCY REFORM ACTS OF 1978 AND 1994 § 58...Under Chapters 7, 12, and 13 of the Bankruptcy Code. (a) UST Form...

2009-07-01

275

Efficient algorithms for multi-file caching  

SciTech Connect

Multi-File Caching issues arise in applications where a set of jobs are processed and each job requests one or more input files. A given job can only be started if all its input files are preloaded into a disk cache. Examples of applications where Multi-File caching may be required are scientific data mining, bit-sliced indexes, and analysis of sets of vertically partitioned files. The difference between this type of caching and traditional file caching systems is that in this environment, caching and replacement decisions are made based on ''combinations of files (file bundles),'' rather than single files. In this work we propose new algorithms for Multi-File caching and analyze their performance. Extensive simulations are presented to establish the effectiveness of the Multi-File caching algorithm in terms of job response time and job queue length.

Otoo, Ekow J.; Rotem, Doron; Seshadri, Sridhar

2004-03-15

276

Enhancing I/O Throughput via Efficient Routing and Placement for Large-scale Parallel File Systems  

SciTech Connect

As storage systems get larger to meet the demands of petascale systems, careful planning must be applied to avoid congestion points and extract the maximum performance. In addition, the large data sets generated by such systems makes it desirable for all compute resources to have common access to this data without needing to copy it to each machine. This paper describes a method of placing I/O close to the storage nodes to minimize contention on Cray s SeaStar2+ network, and extends it to a routed Lustre configuration to gain the same benefits when running against a center-wide file system. Our experiments using half of the resources of Spider the center-wide file system at the Oak Ridge Leadership Computing Facility show that I/O write bandwidth can be improved by up to 45% (from 71.9 to 104 GB/s) for a direct-attached configuration and by 137% (47.6 GB/s to 115 GB/s) for a routed configuration. We demonstrated up to 20.7% reduction in run-time for production scientific applications. With the full Spider system, we demonstrated over 240 GB/s of aggregate bandwidth using our techniques.

Dillow, David A [ORNL; Shipman, Galen M [ORNL; Oral, H Sarp [ORNL; Zhang, Zhe [ORNL; Kim, Youngjae [ORNL

2011-01-01

277

20 CFR 30.10 - Are all OWCP records relating to claims filed under EEOICPA considered confidential?  

Code of Federal Regulations, 2013 CFR

... ENERGY EMPLOYEES OCCUPATIONAL ILLNESS COMPENSATION PROGRAM ACT OF 2000 CLAIMS FOR COMPENSATION UNDER THE ENERGY EMPLOYEES OCCUPATIONAL ILLNESS COMPENSATION PROGRAM ACT OF 2000, AS AMENDED General Provisions Information in Program Records...

2013-04-01

278

Operating System Support for a Video-on-Demand File Service  

Microsoft Academic Search

This paper describes the design and implementation of a continuous media file server intended for use in emerging video-on-demand applications. The main focus and contribution of the paper is in scheduling and admission-control algorithms for accessing the server's processor and storage resources. The scheduling algorithms support multiple classes of tasks with diverse performance requirements and allow for the co-existence of

K. K. Ramakrishnan; Lev Vaitzblit; Cary G. Gray; Uresh Vahalia; Dennis Ting; Percy Tzelnic; Steve Glaser; Wayne Duso

1995-01-01

279

Building Security System Based on Grid Computing To Convert and Store Media Files  

NASA Astrophysics Data System (ADS)

In the recent years, Grid Computing (GC) has made big steps in development, contributing to solve practical problems which need large store capacity and computing performance. This paper introduces an approach to integrate the security mechanisms, Grid Security Infrastructure (GSI) of the open source Globus Toolkit 4.0.6 (GT4) into an application for storing, format converting and playing online media files, based on the GC.

Trung, Hieu Nguyen; Nguyen, Duy; Cao, Tan Dang

280

Cognitive and Neuronal Systems Underlying Obesity  

PubMed Central

Since the late 1970’s obesity prevalence and per capita food intake in the USA have increased dramatically. Understanding the mechanisms underlying the hyperphagia that drives obesity requires focus on the cognitive processes and neuronal systems controlling feeding that occurs in the absence of metabolic need (i.e., "non-homeostatic” intake). Given that a portion of the increased caloric intake per capita since the late 1970’s is attributed to increased meal and snack frequency, and given the increased pervasiveness of environmental cues associated with energy dense, yet nutritionally deplete foods, there’s a need to examine the mechanisms through which food-related cues stimulate excessive energy intake. Here, learning and memory principles and their underlying neuronal substrates are discussed with regard to stimulus-driven food intake and excessive energy consumption. Particular focus is given to the hippocampus, a brain structure that utilizes interoceptive cues relevant to energy status (e.g., neurohormonal signals such as leptin) to modulate stimulus-driven food procurement and consumption. This type of hippocampal-dependent modulatory control of feeding behavior is compromised by consumption of foods common to Western diets, including saturated fats and simple carbohydrates. The development of more effective treatments for obesity will benefit from a more complete understanding of the complex interaction between dietary, environmental, cognitive, and neurophysiological mechanisms contributing to excessive food intake.

Kanoski, Scott E.

2012-01-01

281

Integrated Postsecondary Education Data System (IPEDS): Fall Staff Data File 1995  

NSDL National Science Digital Library

The Fall Staff database contains detailed information on staffing for all Post-secondary institutions in the 50 states, the District of Columbia, and the outlying areas that are eligible to participate in Title IV federal financial aid programs. Information gathered from the IPEDS forms used to create this data file include: distribution of full- and part-time staff by primary occupation, sex, and race-ethnicity; full-time faculty by academic rank and tenure; full-time new hires by sex and race-ethnicity; and number of staff by employment status, primary occupation, and sex. Information on software requirements for reading the data is provided.

Statistics., National C.

1998-01-01

282

Compress Your Files  

ERIC Educational Resources Information Center

|File compression enables data to be squeezed together, greatly reducing file size. Why would someone want to do this? Reducing file size enables the sending and receiving of files over the Internet more quickly, the ability to store more files on the hard drive, and the ability pack many related files into one archive (for example, all files

Branzburg, Jeffrey

2005-01-01

283

Effect of nonideal wavefront on the near filed beam quality disturbed by flaw in target system  

NASA Astrophysics Data System (ADS)

In high-power laser facilities for inertial confinement fusion, there are many large-diameter optical elements, which inevitably have some flaws on the surface. The beam is modulated by these flaws after diffraction transmission, thereby reducing the beam quality of the system. The optical field with high modulation may cause self-focusing in fused silica and thus damage the optical components, which seriously affects the load capacity of the device. Therefore, for high-power laser systems, near field beam quality also has a high demand. In this paper, the effect of flaws and nonideal wavefront of sinusoidal modulation on the near-field quality at specific position behind the focusing lens is analyzed for final target system of high power laser device based on the Huygens-Fresnel diffraction theory. Firstly the beam modulation of ideal wavefront disturbed by flaws is investigated. And the modulation by phase type flaw is more serious than amplitude type. Secondly, near field beam modulation of nonideal wavefront of sinusoidal phase disturbed by flaws is analyzed. Results demonstrate that under some specific conditions of sinusoidal phase, modulation degree is reduced and the beam quality is improved by the nonideal wavefront compared to the ideal wavefront. The results could give some references to the improvement of near field beam quality and mitigation of risk of optical damage caused by self-focusing.

Jiao, Zhaoyang; Zhang, Yanli; Zhang, Junyong; Zhu, Jianqiang

2013-09-01

284

29 CFR 15.303 - How does a Job Corps student file a claim for loss of or damages to personal property under the WIA?  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false How does a Job Corps student file a claim for loss of or damages...STATUTES Claims Arising Out of the Operation of the Job Corps § 15.303 How does a Job Corps student file a claim for loss of or...

2013-07-01

285

18 CFR 250.6 - Form of application to be filed by distributor under section 7(a), seeking gas service of not...  

Code of Federal Regulations, 2013 CFR

...and how the estimates were derived. 7. Do you have or do you need a franchise to render the proposed service? If you have filed an application for such a franchise, with whom was it filed and what action has been taken on it? 8....

2013-04-01

286

Wood Chip Combustion Systems under 116 KW.  

National Technical Information Service (NTIS)

The brochure describes some types of wood chip combustion systems for rural regions. The systems available on the market are listed, and information is presented on things to consider when selecting, buying and operating a wood chip combustion system. (ER...

W. Schwaiger

1983-01-01

287

47 CFR 1.10008 - What are IBFS file numbers?  

Code of Federal Regulations, 2012 CFR

...10008 Section 1.10008 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Grants by Random Selection International Bureau Filing System § 1.10008 What are IBFS file numbers? (a) We assign file...

2012-10-01

288

5 CFR 293.403 - Contents of employee performance files.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Contents of employee performance files. 293.403 Section 293...REGULATIONS PERSONNEL RECORDS Employee Performance File System Records § 293.403 Contents of employee performance files. (a) A decision on...

2013-01-01

289

Scalable I/O Systems via Node-Local Storage: Approaching 1 TB/sec File I/O  

SciTech Connect

The growth in the computational capability of modern supercomputing systems has been accompanied by corresponding increases in CPU count, total RAM, and total storage capacity. Indeed, systems such as Blue-Gene/L [3], BlueGene/P, Ranger, and the Cray XT series have grown to more than 100k processors, with 100 TeraBytes of RAM and are attached to multi-PetaByte storage systems. However, as part of this design evolution, large supercomputers have lost node-local storage elements, such as disks. While this decision was motivated by important considerations like overall system reliability, it also resulted in these systems losing a key level in their memory hierarchy, with nothing to fill the gap between local RAM and the parallel file system. While today's large supercomputers are typically attached to fast parallel file systems, which provide tens of GBs/s of I/O bandwidth, the computational capacity has grown much faster than the storage bandwidth capacity. As such, these machines are now provided with much less than 1GB/s of I/O bandwidth per TeraFlop of compute power, which is below the generally accepted limit required for a well-balanced system [8] [16]. The result is that today's limited I/O bandwidth is choking the capabilities of modern supercomputers, specifically in terms of limiting their working sets and making fault tolerance techniques, such as checkpointing, prohibitively expensive. This paper presents an alternative system design oriented on using node-local storage to improve aggregate system I/O bandwidth. We focus on the checkpointing use-case and present an experimental evaluation of SCR, a new checkpointing library that makes use of node-local storage to significantly improve the performance of checkpointing on large-scale supercomputers. Experiments show that SCR achieves unprecedented write speeds, reaching 700GB/s on 8,752 processors. Our results scale such that we expect a similarly structured system consisting of 12,500 processors to achieve aggregate I/O bandwidth of 1 TB/s.

Moody, A; Bronevetsky, G

2008-05-20

290

Scalable I/O Systems via Node-Local Storage: Approaching 1 TB/sec File I/O  

SciTech Connect

In the race to PetaFLOP-speed supercomputing systems, the increase in computational capability has been accompanied by corresponding increases in CPU count, total RAM, and storage capacity. However, a proportional increase in storage bandwidth has lagged behind. In order to improve system reliability and to reduce maintenance effort for modern large-scale systems, system designers have opted to remove node-local storage from the compute nodes. Today's multi-TeraFLOP supercomputers are typically attached to parallel file systems that provide only tens of GBs/s of I/O bandwidth. As a result, such machines have access to much less than 1GB/s of I/O bandwidth per TeraFLOP of compute power, which is below the generally accepted limit required for a well-balanced system. In a many ways, the current I/O bottleneck limits the capabilities of modern supercomputers, specifically in terms of limiting their working sets and restricting fault tolerance techniques, which become critical on systems consisting of tens of thousands of components. This paper resolves the dilemma between high performance and high reliability by presenting an alternative system design which makes use of node-local storage to improve aggregate system I/O bandwidth. In this work, we focus on the checkpointing use-case and present an experimental evaluation of the Scalable Checkpoint/Restart (SCR) library, a new adaptive checkpointing library that uses node-local storage to significantly improve the checkpointing performance of large-scale supercomputers. Experiments show that SCR achieves unprecedented write speeds, reaching a measured 700GB/s of aggregate bandwidth on 8,752 processors and an estimated 1TB/s for a similarly structured machine of 12,500 processors. This corresponds to a speedup of over 70x compared to the bandwidth provided by the 10GB/s parallel file system the cluster uses. Further, SCR can adapt to an environment in which there is wide variation in performance or capacity among the individual node-local storage elements.

Bronevetsky, G; Moody, A

2009-08-18

291

The Tort System \\  

Microsoft Academic Search

The paper focuses on the effects of claimant behavior, especially fraudulent claiming, in determining liability insurance costs. The theoretical perspective underlying the analysis is that the ease of filing a claim and the net potential payoff affect individuals' incentives to file claims. Compensating claims via the liability system thus may increase incentives to file, because the payoff from a successful

J. David Cummins; Sharon Tennyson

1993-01-01

292

The GIS Files  

NSDL National Science Digital Library

Geographical Information Systems (GIS) are software packages that analyze and classify data for a particular geographical location. This technology has many applications, "from predicting houses in danger of flooding to analysing crime patterns." The GIS Files, operated by Britain's national mapping agency, is a site that gives a good introduction to the basic concepts of GIS. A sequence of seven tutorials explain how the technology came about and how it works. The last chapter provides insight into what might be possible in the future. After looking over the GIS Files, readers should have a reasonable understanding of computer mapping processes and its benefits.

2001-01-01

293

Clinical Accuracy of the Respiratory Tumor Tracking System of the CyberKnife: Assessment by Analysis of Log Files  

SciTech Connect

Purpose: To quantify the clinical accuracy of the respiratory motion tracking system of the CyberKnife treatment device. Methods and Materials: Data in log files of 44 lung cancer patients treated with tumor tracking were analyzed. Errors in the correlation model, which relates the internal target motion with the external breathing motion, were quantified. The correlation model error was compared with the geometric error obtained when no respiratory tracking was used. Errors in the prediction method were calculated by subtracting the predicted position from the actual measured position after 192.5 ms (the time lag to prediction in our current system). The prediction error was also measured for a time lag of 115 ms and a new prediction method. Results: The mean correlation model errors were less than 0.3 mm. Standard deviations describing intrafraction variations around the whole-fraction mean error were 0.2 to 1.9 mm for cranio-caudal, 0.1 to 1.9 mm for left-right, and 0.2 to 2.5 mm for anterior-posterior directions. Without the use of respiratory tracking, these variations would have been 0.2 to 8.1 mm, 0.2 to 5.5 mm, and 0.2 to 4.4 mm. The overall mean prediction error was small (0.0 {+-} 0.0 mm) for all directions. The intrafraction standard deviation ranged from 0.0 to 2.9 mm for a time delay of 192.5 ms but was halved by using the new prediction method. Conclusions: Analyses of the log files of real clinical cases have shown that the geometric error caused by respiratory motion is substantially reduced by the application of respiratory motion tracking.

Hoogeman, Mischa [Department of Radiation Oncology, Erasmus MC-Daniel den Hoed Cancer Center, Rotterdam (Netherlands)], E-mail: m.hoogeman@erasmusmc.nl; Prevost, Jean-Briac; Nuyttens, Joost; Poell, Johan; Levendag, Peter; Heijmen, Ben [Department of Radiation Oncology, Erasmus MC-Daniel den Hoed Cancer Center, Rotterdam (Netherlands)

2009-05-01

294

FILE INTEGRITY CHECKERS: STATE OF THE ART AND BEST PRACTICES  

Microsoft Academic Search

Assuring that system files have not been tampered with over time is a vital, but oft- overlooked, aspect of system security. File integrity checkers provide ways to assure the validity of files on a system. This paper concerns itself with a review of file integrity checkers. It pays particular attention to what the minimum requirements for an integrity checker are,

Yusuf M Motara; Barry Irwin

295

Comparative evaluation of sealing properties of different obturation systems placed over apically fractured rotary NiTi files  

PubMed Central

Aim: To evaluate sealing properties of different obturation systems placed over apically fractured rotary NiTi files. Materials and Methods: Forty freshly extracted human mandibular premolars were prepared by using Protaper (Dentsply-Maillefer, Ballaigues, Switzerland) or the RaCe (FKG Dentaire, La Chaux-de-Fonds, Switzerland) systems (n=20 for each), after which half of the specimens were subjected to instrument separation at the apical level. Roots with and without apically separated instruments (n=5) were filled with the two obturation systems i.e. Thermafil and lateral compaction technique. The modified glucose penetration setup was used to assess the microleakage. The leakage data was statistically analyzed. Results: The amount of leakage was significantly lower in specimens containing fractured instruments, regardless of the obturation method used. Roots obturated with Thermafil displayed significantly less leakage than cold lateral compaction technique, both, in the presence and absence of separated instruments. There was no significant difference among specimens prepared with ProTaper and RaCe when Thermafil obturation was done. But with cold lateral compaction technique, RaCe system showed less leakage as compared to ProTaper system. Conclusion: The type of obturation may play more important role than the type of instrument or retained/non-retained instrument factor.

Taneja, Sonali; Chadha, Rupali; Gupta, Ruchi; Gupta, Anupama

2012-01-01

296

Prospective Payment System Evaluation Studies-Distressed Hospitals under PPS.  

National Technical Information Service (NTIS)

The paper describes the experience of 'financially distressed' hospitals under the Prospective Payment System (PPS). In particular the paper investigates the following: the attributes of financially distressed hospitals under the Tax Equity and Fiscal Res...

K. Merrell D. Kidder

1988-01-01

297

Supply Categories under a Functionalized Supply System.  

National Technical Information Service (NTIS)

The study presents a supply categorization derived from the item behavior patterns in the theater supply system. This categorization is compatible with the supply groupings of other elements of the Armed Forces, potential major allies, and the organizatio...

R. A. Hafner B. R. Baldwin G. P. Chin A. C. Giarratana L. S. Stoneback

1966-01-01

298

I3FS: An In-Kernel Integrity Checker and Intrusion Detection File System  

Microsoft Academic Search

Today, improving the security of computer systems has become an important and difficult problem. Attackers can seriously damage the integrity of systems. Attack detection is complex and time-consuming for system administrators, and it is becoming more so. Current integrity checkers and IDSs operate as user-mode utilities and they primarily perform scheduled checks. Such systems are less effective in detecting attacks

Swapnil Patil; Anand Kashyap; Gopalan Sivathanu; Erez Zadok

2004-01-01

299

CFITSIO: A FITS File Subroutine Library  

NASA Astrophysics Data System (ADS)

CFITSIO is a library of C and Fortran subroutines for reading and writing data files in FITS (Flexible Image Transport System) data format. CFITSIO provides simple high-level routines for reading and writing FITS files that insulate the programmer from the internal complexities of the FITS format. CFITSIO also provides many advanced features for manipulating and filtering the information in FITS files.

Pence, William D.

2010-10-01

300

Inverted File Compression through Document Identifier Reassignment.  

ERIC Educational Resources Information Center

|Discusses the use of inverted files in information retrieval systems and proposes a document identifier reassignment method to reduce the average gap values in an inverted file. Highlights include the d-gap technique; document similarity; heuristic algorithms; file compression; and performance evaluation from a simulation environment. (LRW)|

Shieh, Wann-Yun; Chen, Tien-Fu; Shann, Jean Jyh-Jiun; Chung, Chung-Ping

2003-01-01

301

Reducing File-related Network Traffic in TreadMarks via Parallel File Input\\/Output  

Microsoft Academic Search

In this paper, we describe the implementation of a parallel file I\\/O system on TreadMarks, a page-based software Distributed Shared Memory (DSM) system built on a network of workstations. The main goal of our parallel file I\\/O system is to reduce file-related network traffic in TreadMarks. This prototype employs our previously proposed variable data distribution scheme, which distributes the file

Ce-kuen Shieh; Su-cheong Mac; Bor-jyh Shieh

1999-01-01

302

20 CFR 321.2 - Filing claims for benefits electronically.  

Code of Federal Regulations, 2013 CFR

...321.2 Filing claims for benefits electronically. (a) Electronic filing. A claim for benefits under the Railroad Unemployment...electronically through the Board's Internet Web site, http://www...electronically. A claim for benefits under the Railroad...

2013-04-01

303

20 CFR 321.2 - Filing claims for benefits electronically.  

Code of Federal Regulations, 2010 CFR

...321.2 Filing claims for benefits electronically. (a) Electronic filing. A claim for benefits under the Railroad Unemployment...electronically through the Board's Internet Web site, http://www...electronically. A claim for benefits under the Railroad...

2009-04-01

304

20 CFR 321.2 - Filing claims for benefits electronically.  

Code of Federal Regulations, 2010 CFR

...321.2 Filing claims for benefits electronically. (a) Electronic filing. A claim for benefits under the Railroad Unemployment...electronically through the Board's Internet Web site, http://www...electronically. A claim for benefits under the Railroad...

2010-04-01

305

75 FR 6728 - The Merit Systems Protection Board (MSPB) is Providing Notice of the Opportunity to File Amicus...  

Federal Register 2010, 2011, 2012, 2013

...Protection Board (MSPB) is Providing Notice of the Opportunity to File Amicus Briefs in the Matters of Conyers v. Department of Defense...Federal Register (see 75 FR 3939) a Notice of the opportunity to file amicus briefs in the matter of Crumpler v. Department of...

2010-02-10

306

Tank waste remediation system year 2000 dedicated file server project HNF-3418 project plan  

SciTech Connect

The Server Project is to ensure that all TWRS supporting hardware (fileservers and workstations) will not cause a system failure because of the BIOS or Operating Systems cannot process Year 2000 dates.

SPENCER, S.G.

1999-04-26

307

NASA Technology Transfer System: Under the hood  

Microsoft Academic Search

This paper discusses the modern approach of the implementation NASA Technology Transfer System as a Software as a Service (SaaS) for NASA as a way to reduce cost and increase efficiency. To accommodate scalability and flexibility, a private cloud called XML Datastore (XD) is used as the foundation to provide a SaaS framework. This is implemented to support three verticals,

David Maluf; Mohana Gurram; Tek Okimura

2012-01-01

308

Endothelium under stress: local and systemic messages.  

PubMed

Endothelial responses to stressors are nonuniform and follow the rules of stress-induced hormesis. Responses to the same stressor, depending on its intensity, can range from pro-regenerative to pro-lethal. Exposure to sublethal stressors induces a programmed response that results in stress resistance, whereas a lethal level of a stressor accelerates cell demise. Diverse stressors turn on several default programs within the cells; such programs tend to induce anti-oxidative defenses and anti-inflammatory and pro-survival systems, whereas others tend to switch on pro-apoptotic systems. The response of the kidney endothelium to various forms of acute kidney injury follows these general principles. It is characterized by a proinflammatory pattern that includes up-regulation of different adhesion molecules promoting endothelial-leukocyte interactions, generation of reactive oxygen species, with formation of oxidative and nitrosative stress and mitochondrial damage. Simultaneously, a series of adaptive mechanisms, both local and systemic, are ignited. Stressed endothelial cells broadcast distress signals systemically; these signals can be directed toward the restoration of homeostasis or aggravation of the original insult. PMID:22617768

Brodsky, Sergey V; Goligorsky, Michael S

2012-03-01

309

A Technique for Lock-Less Mirroring in Parallel File Systems  

Microsoft Academic Search

óAs parallel le systems span larger and larger numbers of nodes in order to provide the performance and scalability necessary for modern cluster applications, the need for fault-tolerance and high data availability le systems has arisen. Modern parallel le systems spanning tens, hundreds, or even thousands of servers will require fault tolerance to avoid job failure and catastrophic data loss

Bradley W. Settlemyer; Walter B. Ligon III

2008-01-01

310

Mechanisms underlying Cowpea mosaic virus systemic infection  

Microsoft Academic Search

Systemic virus infection of plants involves; intracellular<\\/span>replication, cell-to-cell movement within the inoculated leaf, and subsequently, long-distance spread to other plant parts via the vasculature (vascular movement).<\\/span>Cell-to-cell movement occurs through the plasmodesma (PD), which are regulated channels in the cell wall connecting adjacent cells. These PD are modified by plant viral movement proteins (MPs) to allow passage of a

M. Santos Silva

2004-01-01

311

Portable and Efficient Continuous Data Protection for Network File Servers  

Microsoft Academic Search

Continuous data protection, which logs every update to a file system, is an enabling technology to protect file sys- tems against malicious attacks and\\/or user mistakes, be- cause it allows each file update to be undoable. Existing implementations of continuous data protection work either at disk access interface or within the file system. Despite the implementation complexity, their performance overhead

Ningning Zhu; Tzi-cker Chiueh

2007-01-01

312

Printer-posted maps from a well-data file  

SciTech Connect

A series of microcomputer programs have been written to aid the geologist in building a well-data file, selectively retrieving data from the file, and generating posted maps on a printer. The system uses an IBM PC with 64K of memory, one disk drive, and an Epson MX 100 printer. The programs are written in BASICA to run under DOS 1.1. The system has been used to conduct regional geologic studies in the Michigan basin and to make field studies.

Bailey, D.J.

1984-04-01

313

Vaccine Adverse Event Reporting System (VAERS) 1991-2000 Historic (Raw Data File on CD-ROM).  

National Technical Information Service (NTIS)

This data set contains information releasable under the Freedom of Information Act (FOIA) from reports submitted to the Vaccine Adverse Event Reporting System (VAERS). The National Childhood Vaccine Injury Act of 1986 (NCVIA) requires health care provider...

1991-01-01

314

Vaccine Adverse Event Reporting System (VAERS) (Historic) January 1, 1998 - December 31, 1998 (Raw Data File) (on Diskette).  

National Technical Information Service (NTIS)

This data set contains information releasable under the Freedom of Information Act (FOIA) from reports submitted to the Vaccine Adverse Event Reporting System (VAERS). The National Childhood Vaccine Injury Act of 1986 (NCVIA) requires health care provider...

1999-01-01

315

TFLOPS PFS: architecture and design of a highly efficient parallel file system  

Microsoft Academic Search

In recent years, many commercial Massively Parallel Processor (MPP) systems have been available to the computing community. These systems provide very high processing power (up to hundreds of GFLOPs), and can scale efficiently with the number of processors. However, many scientific and commercial applications that run on these multiprocessors may not experience significant benefit in terms of speedup and are

Sharad Garg

1998-01-01

316

EVALUATION OF PROTECTION SYSTEM PERFORMANCE USING DFR AND RELAY COMTRADE FILES  

Microsoft Academic Search

SUMMARY The paper proposes an automated analysis system, based on data generated by Digital Fault Recorders, capable of evaluating the protection system operation behavior against expected patterns, pinpointing possible malfunctions and indicating problems prone to rise in the future. The protection performance is evaluated focusing on the external behavior of the relays and the communication channels. This approach allows for

M. A. M. Rodrigues; J. C. C. Oliveira; A. L. L. Miranda; F. D. CAMPOS; N. F. COSTA

317

Red Files  

NSDL National Science Digital Library

Red Files, a four-part documentary series from PBS, utilizes previously unavailable archival sources and interviews to present a fascinating look at the Soviet Union and its Cold War rivalry with the US. This attractive companion site offers a number of resources related to each of the four episodes: Secret Victories of the KGB, Soviet Sports Wars, Secret Soviet Moon Mission, and Soviet Propaganda. For each installment, users will find a story synopsis, the Producer's script, theme music, updates on related events, human interest stories, complete interview transcripts, video clips, a reference section, access to related sections of Russian Archives Online, maps, a timeline, lesson plans, and more. Additional offerings include a collection of links mentioned in the series and an internal search engine. This site joins an already strong tradition at PBS of creating sites that are actual companions to the program, offering new and expanded content for interested users.

318

Leafhopper control in filed-grown red maples with systemic insecticides  

Technology Transfer Automated Retrieval System (TEKTRAN)

Red maple, a popular landscape tree, can be susceptible to foliar damage caused by potato leafhopper feeding. Typical potato leafhopper injury includes distorted leaf tissue and reduced shoot growth. This research identified systemic neonicotinoid insecticides, Allectus and Discus, which controlled...

319

A robotic assistant system for cardiac interventions under MRI guidance  

Microsoft Academic Search

In this paper we present a surgical assistant system for implanting prosthetic aortic valve transapically under MRI guidance, in a beating heart. The system integrates an MR imaging system, a robotic system, as well as user interfaces for a surgeon to plan the procedure and manipulate the robot. A compact robotic delivery module mounted on a robotic arm is used

Ming Li; Dumitru Mazilu; Bradford J. Wood; Keith A. Horvath; Ankur Kapoor

2010-01-01

320

Development of effective face-ventilation systems for oil-shale mining. Open File report  

SciTech Connect

The project describes the design and testing of large face-ventilation systems for oil-shale mining. A design data base was generated by reviewing general industry practice, oil-shale-industry planning, and technical literature. Conceptual designs for seven different systems were developed and evaluated for suitability. A large, free-standing, jet fan and reversible fan with rigid duct were selected for fabrication and testing.

Brechtel, C.E.; Adam, M.E.; Agapito, J.F.T.

1985-10-01

321

zFS - A Scalable Distributed File System Using Object Disks  

Microsoft Academic Search

zFS is a research project aimed at building a decen-tralized le system that distributes all aspects of le and storage management over a set of cooperating ma-chines, interconnected by a high-speed network. zFS is designed to be a le system that scales from a few net-worked computers to several thousand machines and to be built from commodity, o-the-shelf components. The

Ohad Rodeh; Avi Teperman

2003-01-01

322

Single polymer systems under geometric confinement  

NASA Astrophysics Data System (ADS)

Confining a single polymer system leads to a competition between internal cooperativity length scales and external length scales arising from the confining geometry. This competition is relevant in the realm of polymer glasses and in the crowded environment inside cells. In this thesis, I present two different types of single polymer confinement, a single polymer confined to a tube and to a box. Both geometries lead to nontrivial changes in the static and dynamic properties of the polymer as is shown using Monte Carlo simulations. The simulations show confined polymers exhibit regimes of relaxation in their dynamics including non-monotonic time scales for dynamics in a box. In addition, equilibrium monomer-monomer correlations inside the box differ from that of the unconfined polymer. To understand the origin of these simulation results, a theory is developed using a set of Langevin equations. In general, this set of equations has no simple solution, but by assuming that non-interacting normal modes solve these equations, their Fourier transformed equivalents become linearized equations and I solve them self-consistently. The dynamical theory makes use of the equilibrium behavior of the polymer, specifically its monomer-monomer correlations functions which I extracted from blob picture arguments. I then compare the predictions of this linearized Rouse theory to the simulations results. I am not only able to extract the scaling relations, but also able to make predictions on the functional form of the dynamics and crossover time scales. The linearized Rouse theory agrees very well with the simulations of the polymer in a tube. For the polymer in a box, the theory makes good predictions for low volume fractions, but fails at high volume fractions. One approach introduced to solve this problem involves a renormalization of the friction coefficient.

Kalb, Joshua

323

Filing Letter - Adenovirus  

Center for Biologics Evaluation and Research (CBER)

... 21 CFR 601.2(a), we have filed your application ... Our filing review is only a preliminary review ... help accessing information in different file formats, see ... More results from www.fda.gov/biologicsbloodvaccines/vaccines/approvedproducts

324

Filing NDI Letter - Flucelvax  

Center for Biologics Evaluation and Research (CBER)

... 21 CFR 601.2(a), we have filed your application ... Our filing review is only a preliminary review ... help accessing information in different file formats, see ... More results from www.fda.gov/biologicsbloodvaccines/vaccines/approvedproducts

325

Filing Letter - Atryn  

Center for Biologics Evaluation and Research (CBER)

... 21 CFR 601.2(a) we have filed your application ... Our filing review is only a preliminary review ... help accessing information in different file formats, see ... More results from www.fda.gov/biologicsbloodvaccines/bloodbloodproducts/approvedproducts

326

Filing Notification Letter - Spherusol  

Center for Biologics Evaluation and Research (CBER)

... 21 CFR 601.2(a), we have filed your application ... While conducting our filing review, we identified ... accessing information in different file formats, see ... More results from www.fda.gov/biologicsbloodvaccines/allergenics

327

Microactuators for Dual-Stage Servo Systems in Magnetic Disk Files  

NASA Astrophysics Data System (ADS)

This chapter discusses the design and fabrication of electrostatic MEMS microactuators and the design of dual-stage servo systems in disk drives. It introduces fundamental requirements of disk drive servo systems, along with challenges posed by storage densities increases. It describes three potential dual-stage configurations and focuses on actuated slider assemblies using electrostatic MEMS microactuators. The authors discuss major electrostatic actuator design issues, such as linear versus rotary motion, electrostatic array configuration, and differential operation. Capacitive and piezoresistive elements may be used to sense relative slider position, while integrated gimbals and structural isolation may prove useful in improving performance. A detailed design example based on a translational, micromolded actuator illustrates several of these concepts and is accompanied by theoretical and experimental results.

Horowitz, Roberto; Chen, Tsung-Lin; Oldham, Kenn; Li, Yunfeng; Huang, Xinghui; Kon, Shih-Chung; Nagamune, Ryozo

328

Systems approach to mine fire safety. Open File report, 20 Jun 1980-30 June 1986  

SciTech Connect

The report describes a fire-safety evaluation system to be used to determine combinations of widely accepted fire-safety equipment and underground coal-mine features to provide a level of safety equivalent to that required by the U.S. Code of Federal Regulations, Title 30, for underground coal mines. In the evaluation, equivalent safety performance is gauged in terms of overall level of safety provided rather than by a component-by-component comparison.

Shibe, J.A.

1987-04-01

329

Demonstration of coal mine illumination systems. Open file report (final) October 1977-June 1980  

SciTech Connect

The purpose of this program was to demonstrate the feasibility of illuminating various types of underground coal mining machinery as required by the Federal Coal Mine Illumination Standards Part 75.1719 to 75.1719-4 Code of Federal Regulations Title 30. Nine various machines were illuminated and the illumination systems were evaluated for a 3-month period. Factors evaluted were ease of implementation, reliability, ease of maintenance, acceptance by mine workers and operations, illumination degradation, and durability.

Szpak, A.D.; Hahn, W.F.; Skinner, C.S.

1981-01-01

330

Demonstration of coal mine illumination systems. Open file report (final) October 1977June 1980  

Microsoft Academic Search

The purpose of this program was to demonstrate the feasibility of illuminating various types of underground coal mining machinery as required by the Federal Coal Mine Illumination Standards Part 75.1719 to 75.1719-4 Code of Federal Regulations Title 30. Nine various machines were illuminated and the illumination systems were evaluated for a 3-month period. Factors evaluted were ease of implementation, reliability,

A. D. Szpak; W. F. Hahn; C. S. Skinner

1981-01-01

331

Making resonance a common case: a high-performance implementation of collective I/O on parallel file systems  

SciTech Connect

Collective I/O is a widely used technique to improve I/O performance in parallel computing. It can be implemented as a client-based or server-based scheme. The client-based implementation is more widely adopted in MPI-IO software such as ROMIO because of its independence from the storage system configuration and its greater portability. However, existing implementations of client-side collective I/O do not take into account the actual pattern offile striping over multiple I/O nodes in the storage system. This can cause a significant number of requests for non-sequential data at I/O nodes, substantially degrading I/O performance. Investigating the surprisingly high I/O throughput achieved when there is an accidental match between a particular request pattern and the data striping pattern on the I/O nodes, we reveal the resonance phenomenon as the cause. Exploiting readily available information on data striping from the metadata server in popular file systems such as PVFS2 and Lustre, we design a new collective I/O implementation technique, resonant I/O, that makes resonance a common case. Resonant I/O rearranges requests from multiple MPI processes to transform non-sequential data accesses on I/O nodes into sequential accesses, significantly improving I/O performance without compromising the independence ofa client-based implementation. We have implemented our design in ROMIO. Our experimental results show that the scheme can increase I/O throughput for some commonly used parallel I/O benchmarks such as mpi-io-test and ior-mpi-io over the existing implementation of ROMIO by up to 157%, with no scenario demonstrating significantly decreased performance.

Davis, Marion Kei [Los Alamos National Laboratory; Zhang, Xuechen [WAYNE STATE UNIV; Jiang, Song [WAYNE STATE UNIV

2009-01-01

332

Inorganic Crystal Structure Database in Conjunction with Crystal Structure Information System and Its Application to CCDF (Cambridge Crystallographic Data File) and MDF (Metal Data File).  

National Technical Information Service (NTIS)

The dialogue oriented system CRYSTIN was developed in order to enable online searches of crystal structure data bases. Commands and descripter classes are summarized. Examples of simple searches are presented.

G. Bergerhoff B. Kilger C. Witthauer R. Hundt R. Sievers

1984-01-01

333

Audit of energy usage in commercial buildings lighting systems (Massachusetts). Data file  

SciTech Connect

The data on this tape was collected by the Massachusetts State Building Code Commission through a regulatory process designed to save energy in commercial buildings. This regulation sought energy efficiency in lighting systems by establishing a watts per square foot building budget and by requiring the submittal of an audit summarizing the lighting system through the delineation of six broad categories of space usages based on lighting needs. The SBCC received 9299 audits which were computerized - entering square footage and connected load figures for all applicable categories and distinguishing by sequence number, municipality, building use, and building type (existing, new construction, addition or renovation). The data base has been used to report compliance with this regulation and for statistical analysis. A report based upon the results of the statistical analysis is available through the Comm. of Mass. State Building Code Commission, 1 Ashburton Place, Room 1305, Boston, MA. The title of the report is: Energy usage in lighting practices: A report on the power used in commercial buildings in Massachusetts.

Fleming, L.A.; DeVeaux, J.

1980-12-01

334

Secure transmission mechanism for networked control systems under deception attacks  

Microsoft Academic Search

With the rapid developments in computer, commu- nication and control technologies, the networked control systems (NCSs) have been a growing trend in industrial automation systems for the purposes of distributed management and control. This paper addresses the security issues of data transmitted in NCSs under deception attacks, especially confidentiality, integrity and authenticity. Deception attacks can deteriorate the system performance or

Zhong-Hua Pang; Geng Zheng; Guo-Ping Liu; Chun-Xiang Luo

2011-01-01

335

Site Enforcement Tracking System (SETs) (Region 7) (for microcomputers). Data file  

SciTech Connect

When expending Superfund monies at a CERCLA (Comprehensive Environmental Response, Compensation and Liability Act) site, EPA must conduct a search to identify parties with potential financial responsibility for remediation of uncontrolled hazardous waste sites. EPA regional Superfund Waste Management Staff issue a notice letter to the potentially responsible party (PRP). Data from this notice letter is used to form the Site Enforcement Tracking System (SETS). This data includes PRP name and address, a company contact person, the date the notice was issued, and the related CERCLA site name and identification number. SETS was created by EPA to track PRP identification at both NPL (National Priority List) and non-NPL sites. SETS does not address the range of other administrative duties related to tracking the PRP. These lists represent EPA's preliminary findings on the identities of PRPs. Inclusion on these lists does not constitute a final determination concerning the liability of any party for the hazard or contamination at any CERCLA site. Region 7 includes Iowa, Kansas, Missouri, and Nebraska.

Not Available

1990-07-31

336

Site Enforcement Tracking System (SETS) (Region 2) (for microcomputers). Data file  

SciTech Connect

When expending Superfund monies at a CERCLA (Comprehensive Environmental Response, Compensation and Liability Act) site, EPA must conduct a search to identify parties with potential financial responsibility for remediation of uncontrolled hazardous waste sites. EPA regional Superfund Waste Management Staff issue a notice letter to the potentially responsible party (PRP). Data from this notice letter is used to form the Site Enforcement Tracking System (SETS). This data includes PRP name and address, a company contact person, the date the notice was issued, and the related CERCLA site name and identification number. SETS was created by EPA to track PRP identification at both NPL (National Priority List) and non-NPL sites. SETS does not address the range of other administrative duties related to tracking the PRP. These lists represent EPA's preliminary findings on the identities of PRPs. Inclusion on these lists does not constitute a final determination concerning the liability of any party for the hazard or contamination at any CERCLA site. Region 2 includes New Jersey, New York, Puerto Rico, and the Virgin Islands.

Not Available

1990-08-01

337

Loading System for Creep Testing under Constant Compressive Stress.  

National Technical Information Service (NTIS)

A critical analysis is made of layouts assuring constant stress under creep, pointing out the difficulties of using these layouts for compressive testing. A new mechanical system to maintain stress during creep testing is proposed. Constant stress is achi...

F. Dobes O. Zverina J. Cadek

1987-01-01

338

Bit Transposed Files  

Microsoft Academic Search

Introduction and Motivation Conventional access methods cannot be effectively used in large Scientific\\/Statistical Database (SSDB) applications. A file structure (called bit tran- sposed file) is proposed which offers several attractive features that are better suited for the special charac- teristics that SSDBs exhibit. This file structure is an extreme version of the (attribute) transposed file. The data is stored by

Harry K. T. Wong; Hsiu-fen Liu; Frank Olken; Doron Rotem; Linda Wong

1985-01-01

339

Y-lib: a user level library to increase the performance of MPI-IO in a lustre file system environment  

Microsoft Academic Search

It is widely known that MPI-IO performs poorly in a Lustre file system environment, although the reasons for such performance are currently not well understood. The research presented in this paper strongly supports our hypothesis that MPI-IO performs poorly in this environment because of the fundamental assumptions upon which most parallel I\\/O optimizations are based. In particular, it is almost

Phillip M. Dickens; Jeremy Logan

2009-01-01

340

36 CFR 1150.21 - Form of documents to be filed.  

Code of Federal Regulations, 2011 CFR

... PRACTICE AND PROCEDURES FOR COMPLIANCE HEARINGS Form, Execution, Service and Filing of Documents for Proceedings on Citations § 1150.21 Form of documents to be filed. Documents to be filed under the rules in this part shall be...

2011-07-01

341

36 CFR 1150.21 - Form of documents to be filed.  

Code of Federal Regulations, 2012 CFR

... PRACTICE AND PROCEDURES FOR COMPLIANCE HEARINGS Form, Execution, Service and Filing of Documents for Proceedings on Citations § 1150.21 Form of documents to be filed. Documents to be filed under the rules in this part shall be...

2012-07-01

342

20 CFR 30.101 - In general, how is a survivor's claim filed?  

Code of Federal Regulations, 2013 CFR

...COMPENSATION PROGRAM ACT OF 2000, AS AMENDED Filing Claims; Evidence and Burden of Proof; Special Procedures for Certain Cancer Claims Filing Claims for Benefits Under Eeoicpa § 30.101 In general, how is a survivor's claim filed?...

2013-04-01

343

37 CFR 360.21 - Time of filing.  

Code of Federal Regulations, 2013 CFR

... false Time of filing. 360.21 Section 360.21 Patents, Trademarks, and Copyrights COPYRIGHT ROYALTY BOARD, LIBRARY OF CONGRESS SUBMISSION OF ROYALTY CLAIMS FILING OF CLAIMS TO ROYALTY FEES COLLECTED UNDER COMPULSORY LICENSE...

2013-07-01

344

29 CFR 1981.103 - Filing of discrimination complaint.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Filing of discrimination complaint. 1981.103 Section... PROCEDURES FOR THE HANDLING OF DISCRIMINATION COMPLAINTS UNDER SECTION 6 OF THE...Orders § 1981.103 Filing of discrimination complaint. (a) Who may...

2013-07-01

345

29 CFR 1979.103 - Filing of discrimination complaint.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Filing of discrimination complaint. 1979.103 Section... PROCEDURES FOR THE HANDLING OF DISCRIMINATION COMPLAINTS UNDER SECTION 519 OF...Orders § 1979.103 Filing of discrimination complaint. (a) Who may...

2013-07-01

346

43 CFR 4.1107 - Filing of documents.  

Code of Federal Regulations, 2012 CFR

...APPEALS PROCEDURES Special Rules Applicable to Surface... § 4.1107 Filing of documents. (a...conducted by an administrative law judge under these rules shall be filed, by hand...Hearings Division, Office of Hearings and...

2012-10-01

347

43 CFR 4.1107 - Filing of documents.  

Code of Federal Regulations, 2011 CFR

...APPEALS PROCEDURES Special Rules Applicable to Surface... § 4.1107 Filing of documents. (a...conducted by an administrative law judge under these rules shall be filed, by hand...Hearings Division, Office of Hearings and...

2011-10-01

348

Downloading Replicated, Wide-Area Files - A Framework and Empirical Evaluation  

Microsoft Academic Search

The challenge of efficiently retrieving files that are bro- ken into segments and replicated across the wide-area is of prime importance to wide-area, peer-to-peer, and Grid file systems. Two differing algorithms addressing this challenge have been proposed and evaluated. While both have been successful in differing performance scenarios, there has been no unifying work that can view both algorithms under

Rebecca L. Collins; James S. Plank

2004-01-01

349

Optimal Capacitor Allocation in Radial Distribution Systems under APDRP  

Microsoft Academic Search

Optimum location and size of capacitors for a distribution system under APDRP (Accelerated Power Development Programme) is presented. In the present study capacitor sizes are assumed as discrete known variables, which are to be placed on the buses such that it reduces the losses of the distribution system to a minimum. Genetic algorithm is used as an optimization tool, which

S. Azim; K. S. Swarup

2005-01-01

350

Serous Retinal Detachment in Patients Under Systemic Corticosteroid Treatment  

Microsoft Academic Search

Purpose: To understand the pathophysiology of central serous chorioretinopathy or bullous retinal detachment in patients under systemic corticosteroid treatment. Little is understood about the mechanism of the development of serous retinal detachment.Methods: Three patients who had developed central serous chorioretinopathy or bullous retinal detachment during systemic corticosteroid administration were examined by fluorescein angiography and indocyanine green angiography.Results: Indocyanine green angiography

Shigeru Kishi; Osamu Yoshida; Rika Matsuoka; Yoshiharu Kojima

2001-01-01

351

Profitability under an Open versus a Closed System  

Microsoft Academic Search

This paper explores the conditions under which a monopolist selling a system consisting of a main component and differentiated secondary components can increase profits by allowing competition in the aftermarket for the secondary components. Opening the system in this fashion can increase profits by giving consumers an added incentive to incur the setup cost of purchasing the main component. This

Michael Kende

1998-01-01

352

Expected waiting times in polling systems under priority disciplines  

Microsoft Academic Search

In this paper, we analyse a service system which consists of several queues (stations) polled by a single server in a cyclic order with arbitrary switchover times. Customers from several priority classes arrive into each of the queues according to independent Poisson processes and require arbitrarily distributed service times. We consider the system under various priority service disciplines: head-of-the-line priority

L. Fournier; Z. Rosberg

1991-01-01

353

Three-dimensional modeling of supine human and transport system under whole-body vibration.  

PubMed

The development of predictive computer human models in whole-body vibration has shown some success in predicting simple types of motion, mostly for seated positions and in the uniaxial vertical direction. The literature revealed only a handful of papers that tackled supine human modeling in response to vertical vibration. The objective of this work is to develop a predictive, multibody, three-dimensional human model to simulate the supine human and underlying transport system in response to multidirectional whole-body vibration. A three-dimensional dynamic model of a supine human and its underlying transport system is presented in this work to predict supine-human biodynamic response under three-dimensional input random whole-body vibration. The proposed supine-human model consists of three interconnected segments representing the head, torso-arms, and pelvis-legs. The segments are connected via rotational and translational joints that have spring-damper components simulating the three-dimensional muscles and tissuelike connecting elements in the three x, y, and z directions. Two types of transport systems are considered in this work, a rigid support and a long spinal board attached to a standard military litter. The contact surfaces between the supine human and the underlying transport system are modeled using spring-damper components. Eight healthy supine human subjects were tested under combined-axis vibration files with a magnitude of 0.5?m/s2 (rms) and a frequency content of 0.5-16?Hz. The data from seven subjects were used in parameter identification for the dynamic model using optimization schemes in the frequency domain that minimize the differences between the magnitude and phase of the predicted and experimental transmissibility. The predicted accelerations in the time and frequency domains were comparable to those gathered from experiments under different anthropometric, input vibration, and transport conditions under investigation. Based on the results, the proposed dynamic model has the potential to be used to provide motion data to drive a detailed finite element model of a supine human for further investigation of muscle forces and joint dynamics. The predicted kinematics of the supine human and transport system would also benefit patient safety planners and vibration suppression designers in their endeavors. PMID:23699722

Wang, Yang; Rahmatalla, Salam

2013-06-01

354

37 CFR 401.16 - Electronic filing.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Electronic filing. 401.16 Section 401.16...MADE BY NONPROFIT ORGANIZATIONS AND SMALL BUSINESS FIRMS UNDER GOVERNMENT GRANTS, CONTRACTS...COOPERATIVE AGREEMENTS § 401.16 Electronic filing. Unless otherwise...

2013-07-01

355

Small-World File-Sharing Communities  

Microsoft Academic Search

Web caches, content distribution networks, peer-to-peer file sharing networks, distributed file system s, and data grids all have in common that they involve a community of users who generate requests for shared data. In each case, overall system performance can be improved significantly if we can first identify and then exploit interesting structure within a community's access patterns. To this

Adriana Iamnitchi; Matei Ripeanu; Ian T. Foster

2003-01-01

356

TRUFFLES — A SECURE SERVICE FOR WIDESPREAD FILE SHARING  

Microsoft Academic Search

Truffles is a system meant to address some of the major issues that still make it difficult to share files between users at different sites. In particular, it addresses the problems associated with secure file sharing, and the problems of high administrative overhead. Truffles will combine facilities of the Ficus file system and TIS\\/PEM, a privacy enhanced mail system, to

Peter Reiher; Jr. Gerald Popek

1993-01-01

357

Wotsit's File Format Collection  

NSDL National Science Digital Library

Wotsit's File Format Collection, provided by Paul Oliver, features a very large number of file formats. These include JPEG image files, wave sound files, Rich Text files, and common database and word-processing files such as Paradox and Wordperfect. Documents collected or linked at the site are primarily either original specifications from the creator or an improved version of the original. All of the specifications are very technical and are directed towards programmers. Users can subscribe to a mailing list for notification of site updates.

358

Experiments in text file compression  

Microsoft Academic Search

A system for the compression of data files, viewed as strings of characters, is presented. The method is general, and applies equally well to English, to PL\\/I, or to digital data. The system consists of an encoder, an analysis program, and a decoder. Two algorithms for encoding a string differ slightly from earlier proposals. The analysis program attempts to find

Frank Rubin

1976-01-01

359

Hybrid magnetic attitude control system under CubeSat standards  

Microsoft Academic Search

In a one-unit (1U) CubeSat satellite, the attitude determination and control system restricts its allocated mass to be in the range of 150–200 g, and to operate with at most 1 W. Under such tight constraints, effective attitude control system design becomes quite challenging, especially for institutions that have no prior experience in space projects. Novice institutions usually start by

Renato Miyagusuku; Klebes R. Arias; Elizabeth R. Villota

2012-01-01

360

Efficacy of the Self Adjusting File (SAF) system on cleaning and shaping oval canals:A microbiological and microscopic evaluation  

Microsoft Academic Search

IntroductionThe shaping ability of root canal instruments is determined by a complex interrelationship of parameters, such as cross-sectional design, and the ability to remove debris and the smear layer. The Self-adjusting file (SAF) consists of a hollow, flexible instrument in the form of a compressible, thin-walled, pointed cylinder. The aim of this study was to compare the SAF to the

Avina Paranjpe; Cesar de Gregorio; Ana Maria Gonzalez; Arianna Gomez; Daniel Silva Herzog; Antonio Aragón Piña; Nestor Cohenca

361

Towards A Market Managed Peer-to-Peer File Sharing System Using Token-based Accounting and Distributed Pricing  

Microsoft Academic Search

This paper presents a token-based accounting mecha- nism that alleviates the free riding problem in P2P net- works. On the basis of a P2P file sharing scenario it is shown how tokens are issued, certified and used as a pay- ment in a secure and scalable way. The approach is com- plemented by distributed pricing as a flexible and viable

David Hausheer; Nicolas C. Liebau; Andreas Mauthe; Ralf Steinmetz; Burkhard Stiller

2003-01-01

362

A Method for Searching Keyword-Lacking Files Based on Interfile Relationships  

Microsoft Academic Search

Current information technologies require file systems to contain so many files that searching for desired files is a major problem. To address this problem, desktop search tools using full-text search techniques have been de- veloped. However, those files lacking any given keywords, such as picture files and the source data of experiments, cannot be found by tools based on full-text

Tetsutaro Watanabe; Takashi Kobayashi; Haruo Yokota

2008-01-01

363

11 CFR 104.5 - Filing dates (2 U.S.C. 434(a)(2)).  

Code of Federal Regulations, 2012 CFR

...required to file the next required report under its new filing frequency. The committee...required to file the next required report under its new filing frequency. A political...that the Commission receives a new 48-hour report of the subsequent...

2012-01-01

364

NDC Product File Definitions  

Center for Drug Evaluation (CDER)

... contains ONLY information submitted to FDA in SPL electronic listing files by labelers ... entry is the responsibility of the labeler submitting the SPL file. ... More results from www.fda.gov/drugs/informationondrugs

365

Distributed Neural Systems Underlying the Timing of Movements  

Microsoft Academic Search

Timing is essential to the execution of skilled movements, yet our knowledge of the neural systems underlying timekeeping operations is limited. Using whole-brain functional magnetic resonance imaging, subjects were imaged while tapping with their right index finger in synchrony with tones that were sep- arated by constant intervals (Synchronization (S)), followed by tapping without the benefit of an auditory cue

Stephen M. Rao; Deborah L. Harrington; Kathleen Y. Haaland; Julie A. Bobholz; Robert W. Cox; Jeffrey R. Binder

1997-01-01

366

Multiobjective design of water distribution systems under uncertainty  

Microsoft Academic Search

The water distribution system (WDS) design problem is defined here as a multiobjective optimization problem under uncertainty. The two objectives are (1) minimize the total WDS design cost and (2) maximize WDS robustness. The WDS robustness is defined as the probability of simultaneously satisfying minimum pressure head constraints at all nodes in the network. Decision variables are the alternative design

Zoran S. Kapelan; Dragan A. Savic; Godfrey A. Walters

2005-01-01

367

Computational Hemodynamic Simulation of Human Circulatory System under Altered Gravity  

Microsoft Academic Search

A computational hemodynamics approach is presented to simulate the blood flow through the human circulatory system under altered gravity conditions. Numerical techniques relevant to hemodynamics issues are introduced to non-Newtonian modeling for flow characteristics governed by red blood cells, distensible wall motion due to the heart pulse, and capillary bed modeling for outflow boundary conditions. Gravitational body force terms are

Chang Sung Kim; Cetin Kids; Dochan Kwak

2004-01-01

368

Cholinergic System Under Aluminium Toxicity in Rat Brain  

PubMed Central

The present investigation envisages the toxic effects of aluminium on the cholinergic system of male albino rat brain. Aluminium toxicity (LD50/24 h) evaluated as per Probit method was found to be 700 mg/kg body weight. One-fifth of lethal dose was taken as the sublethal dose. For acute dose studies, rats were given a single lethal dose of aluminium acetate orally for one day only and for chronic dose studies, the rats were administered with sublethal dose of aluminium acetate once in a day for 25 days continuously. The two constituents of the cholinergic system viz. acetylcholine and acetylcholinesterase were determined in selected regions of rat brain such as cerebral cortex, hippocampus, hypothalamus, cerebellum, and pons-medulla at selected time intervals/days under acute and chronic treatment with aluminium. The results revealed that while acetylcholinesterase activity was inhibited, acetylcholine level was elevated differentially in all the above mentioned areas of brain under aluminium toxicity, exhibiting area-specific response. All these changes in the cholinergic system were subsequently manifested in the behavior of rat exhibiting the symptoms such as adipsia, aphagia, hypokinesia, fatigue, seizures, etc. Restoration of the cholinergic system and overt behavior of rat to the near normal levels under chronic treatment indicated the onset of either detoxification mechanisms or development of tolerance to aluminium toxicity in the animal which was not probably so efficient under acute treatment.

Yellamma, K.; Saraswathamma, S.; Kumari, B. Nirmala

2010-01-01

369

File caching in data intensive scientific applications  

SciTech Connect

We present some theoretical and experimental results of animportant caching problem that arises frequently in data intensivescientific applications. In such applications, jobs need to processseveral files simultaneously, i.e., a job can only be serviced if all itsneeded files are present in the disk cache. The set of files requested bya job is called a file-bundle. This requirement introduces the need forcache replacement algorithms based on file-bundles rather then individualfiles. We show that traditional caching algorithms such Least RecentlyUsed (LRU), and GreedyDual-Size (GDS), are not optimal in this case sincethey are not sensitive to file-bundles and may hold in the cachenon-relevant combinations of files. In this paper we propose and analyzea new cache replacement algorithm specifically adapted to deal withfile-bundles. We tested the new algorithm using a disk cache simulationmodel under a wide range of parameters such as file requestdistributions, relative cache size, file size distribution,and queuesize. In all these tests, the results show significant improvement overtraditional caching algorithms such as GDS.

Otoo, Ekow; Rotem, Doron; Romosan, Alexandru; Seshadri, Sridhar

2004-07-18

370

ACCIDENT, ILLNESS AND INJURY AND EMPLOYMENT SELF-EXTRACTING FILES  

EPA Science Inventory

Files containing information of accidents, illnesses and injuries of miners. These "self-extracting" files are the actual information (raw data) from the accident and injury MSHA Form 7000-2 filed with MSHA by mining operators and contractors as required under the 30 CFR Part 50....

371

48 CFR 2804.805 - Storage, handling, and disposal of contract files.  

Code of Federal Regulations, 2011 CFR

...Regulations System 6 2011-10-01 2011-10-01 false Storage, handling, and disposal of contract files. 2804.805...ADMINISTRATIVE MATTERS Government Contract Files 2804.805 Storage, handling, and disposal of contract files. In...

2011-10-01

372

48 CFR 904.805 - Storage, handling, and disposal of contract files.  

Code of Federal Regulations, 2011 CFR

...Regulations System 5 2011-10-01 2011-10-01 false Storage, handling, and disposal of contract files. 904.805...ADMINISTRATIVE MATTERS Government Contract Files 904.805 Storage, handling, and disposal of contract files....

2011-10-01

373

Conservation Laws for under Determined Systems of Differential Equations  

NASA Astrophysics Data System (ADS)

This work extends the Ibragimov's conservation theorem for partial differential equations [J. Math. Anal. Appl. 333 (2007 311-328] to under determined systems of differential equations. The concepts of adjoint equation and formal Lagrangian for a system of differential equations whose the number of equations is equal to or lower than the number of dependent variables are defined. It is proved that the system given by an equation and its adjoint is associated with a variational problem (with or without classical Lagrangian) and inherits all Lie-point and generalized symmetries from the original equation. Accordingly, a Noether theorem for conservation laws can be formulated.

Hounkonnou, M. N.; Sielenou, P. D.

2010-11-01

374

26 CFR 1.37-3 - Credit for individuals under age 65 who have public retirement system income.  

Code of Federal Regulations, 2011 CFR

...individuals under age 65. Disability...received under a public retirement...individual under age 65 at the close...section 37(e) in the case of joint... In the case of a joint return of...beginning after 1977, married individuals filing...spouse. Since the younger spouse...

2013-04-01

375

47 CFR 1.1704 - Station files.  

Code of Federal Regulations, 2012 CFR

...Selection Cable Operations and Licensing System (COALS) § 1.1704 Station files...of authorizations, comprising technical, legal, and administrative data relating to each system in the Multichannel Video and Cable...

2012-10-01

376

77 FR 27221 - Combined Notice of Filings  

Federal Register 2010, 2011, 2012, 2013

...12. Docket Numbers: ER12-1577-000. Applicants: Midwest Independent Transmission System. Description: 09-19-12 MEP Filing to be effective 7/1/2012. Filed Date: 4/19/12. Accession Number: 20120419-5229. Comments Due: 5...

2012-05-09

377

Rewriting Executable Files to Measure Program Behavior  

Microsoft Academic Search

executiondramatically reduces the cost of program tracing and the size of trace files by factorsof 50 or more over simple techniques that record every reference. qpt is a secondgeneration tracing system. The earlier version, AE, was a modification to the GnuC compiler gcc that inserted tracing code while compiling a C program. Note thatqpt, because it operates on executable files

James R. Larus; Thomas Ball

1994-01-01

378

FITSIO - New Features in the Interface to FITS Data Files  

NASA Astrophysics Data System (ADS)

The FITSIO subroutine library was first written 2 years ago to provide a simple programmer interface for reading and writing data files in FITS (Flexible Image Transport System) format. The FITSIO library has been continually updated since it was first released, and this talk is intended to describe some of the new features that have been added. The FITS format (especially the binary table extensions) can be used to store very complex data structures. FITSIO hides the underlying complexity of the FITS files from the programmer and provides a simple to use set of machine-independent subroutine calls for reading or writing the data. FITSIO is supported on most popular computer systems, including the new DEC ALPHA machine. The FITSIO package is written completely in Fortran, but sets of C and SPP/IRAF wrapper routines are also available for convenience when calling FITSIO from programs written in these languages. An extensive suite of interface subroutines is provided in FITSIO to perform all required operations on a FITS file. This includes routines to read, append, insert, modify, or delete header keywords, and routines to read or write any subset of data contained in the FITS primary array or a FITS extension (IMAGE, TABLE, and BINTABLE extensions are all supported). Work is currently in progress to add data compression capabilities to the FITSIO interface. The design goals are to make the compression transparent to the application program that reads the FITS file and to make the compressed FITS files themselves legal FITS files. Some recent experiments in this area will be described.

Pence, W.

1993-05-01

379

A nonlinear system under combined periodic and random excitation  

SciTech Connect

The anharmonic oscillator under combined sinusoidal and white noise excitation is studied using the Gaussian closure approximation. The mean response and the steady-state variance of the system is obtained by the WKBJ approximation and also by the Fokker-Planck equation. The multiple steady-state solutions are obtained and their stability analysis is presented. Numeric al results are obtained for a particular set of system parameters. The theoretical results are compared with a digital simulation study to bring out the usefulness of the present approximate theory.

Iyengar, R.N.

1986-09-01

380

Spin system trajectory analysis under optimal control pulses.  

PubMed

Several methods are proposed for the analysis, visualization and interpretation of high-dimensional spin system trajectories produced by quantum mechanical simulations. It is noted that expectation values of specific observables in large spin systems often feature fast, complicated and hard-to-interpret time dynamics and suggested that populations of carefully selected subspaces of states are much easier to analyze and interpret. As an illustration of the utility of the proposed methods, it is demonstrated that the apparent "noisy" appearance of many optimal control pulses in NMR and EPR spectroscopy is an illusion - the underlying spin dynamics is shown to be smooth, orderly and very tightly controlled. PMID:23541031

Kuprov, Ilya

2013-02-27

381

Evaluation of forest management systems under risk of wildfire  

Microsoft Academic Search

We evaluate the economic efficiency of even- and uneven-aged management systems under risk of wildfire. The management problems\\u000a are formulated for a mixed-conifer stand and approximations of the optimal solutions are obtained using simulation optimization.\\u000a The Northern Idaho variant of the Forest Vegetation Simulator and its Fire and Fuels Extension is used to predict stand growth\\u000a and fire effects. Interest

Kari Hyytiäinen; Robert G. Haight

2010-01-01

382

Robust Control of Immune Systems Under Noises: Stochastic Game Approach  

Microsoft Academic Search

\\u000a A robust control of immune response is proposed for therapeutic en- hancement to match a prescribed immune response under\\u000a uncertain initial states and environmental noises, including continuous intrusion of exogenous pathogens. The worst-case effect\\u000a of all possible noises and uncertain initial states on the matching for a desired immune response is minimized for the enhanced\\u000a immune system, i.e., a robust

Bor-Sen Chen; Chia-Hung Chang; Yung-Jen Chuang

383

Nonlinear system identification of smart structures under high impact loads  

NASA Astrophysics Data System (ADS)

The main purpose of this paper is to develop numerical models for the prediction and analysis of the highly nonlinear behavior of integrated structure control systems subjected to high impact loading. A time-delayed adaptive neuro-fuzzy inference system (TANFIS) is proposed for modeling of the complex nonlinear behavior of smart structures equipped with magnetorheological (MR) dampers under high impact forces. Experimental studies are performed to generate sets of input and output data for training and validation of the TANFIS models. The high impact load and current signals are used as the input disturbance and control signals while the displacement and acceleration responses from the structure-MR damper system are used as the output signals. The benchmark adaptive neuro-fuzzy inference system (ANFIS) is used as a baseline. Comparisons of the trained TANFIS models with experimental results demonstrate that the TANFIS modeling framework is an effective way to capture nonlinear behavior of integrated structure-MR damper systems under high impact loading. In addition, the performance of the TANFIS model is much better than that of ANFIS in both the training and the validation processes.

Sarp Arsava, Kemal; Kim, Yeesock; El-Korchi, Tahar; Park, Hyo Seon

2013-05-01

384

11 CFR 100.19 - File, filed or filing (2 U.S.C. 434(a)).  

Code of Federal Regulations, 2013 CFR

...true File, filed or filing (2 U.S.C. 434(a)). 100.19 Section 100...GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) General Definitions § 100.19 File, filed or filing (2 U.S.C. 434(a)). With respect to...

2013-01-01

385

20 CFR 30.100 - In general, how does an employee file an initial claim for benefits?  

Code of Federal Regulations, 2013 CFR

...COMPENSATION PROGRAM ACT OF 2000, AS AMENDED Filing Claims; Evidence and Burden of Proof; Special Procedures for Certain Cancer Claims Filing Claims for Benefits Under Eeoicpa § 30.100 In general, how does an employee file an initial claim...

2013-04-01

386

Soil Erodibility Parameters Under Various Cropping Systems of Maize  

NASA Astrophysics Data System (ADS)

For four years, runoff and soil loss from seven cropping systems of fodder maize have been measured on experimental plots under natural and simulated rainfall. Besides runoff and soil loss, several variables have also been measured, including rainfall kinetic energy, degree of slaking, surface roughness, aggregate stability, soil moisture content, crop cover, shear strength and topsoil porosity. These variables explain a large part of the variance in measured runoff, soil loss and splash erosion under the various cropping systems. The following conclusions were drawn from the erosion measurements on the experimental plots (these conclusions apply to the spatial level at which the measurements were carried out). (1) Soil tillage after maize harvest strongly reduced surface runoff and soil loss during the winter; sowing of winter rye further reduced winter erosion, though the difference with a merely tilled soil is small. (2) During spring and the growing season, soil loss is reduced strongly if the soil surface is partly covered by plant residues; the presence of plant residue on the surface appeared to be essential in achieving erosion reduction in summer. (3) Soil loss reductions were much higher than runoff reductions; significant runoff reduction is only achieved by the straw system having flat-lying, non-fixed plant residue on the soil surface; the other systems, though effective in reducing soil loss, were not effective in reducing runoff.

van Dijk, P. M.; van der Zijp, M.; Kwaad, F. J. P. M.

1996-08-01

387

Spectrally Efficient Frequency Hopping System Design under Hostile Jamming  

NASA Astrophysics Data System (ADS)

This paper considers spectrally efficient anti-jamming system design based on message-driven frequency hopping (MDFH). As a highly efficient frequency hopping scheme, MDFH is particularly robust under strong jamming. However, disguised jamming from sources of similar power strength can cause performance losses. To overcome this drawback, in this paper, we first propose an anti-jamming MDFH (AJ-MDFH) system. The main idea is to transmit an ID sequence along with the information stream. The ID sequence is generated through a cryptographic algorithm using the shared secret between the transmitter and the receiver. It is then exploited by the receiver for effective signal detection and extraction. It is shown that AJ-MDFH is not only robust under strong jamming, but can also effectively reduce the performance degradation caused by disguised jamming. Second, we extend AJ-MDFH to a multi-carrier scheme for higher spectral efficiency and more robust jamming resistance. Based on secure group generation, MC-AJ-MDFH can increase the system efficiency and jamming resistance significantly through jamming randomization and enriched frequency diversity. Moreover, by assigning different carriers to different users, MC-AJ-MDFH can readily be used as a collision-free multiple access system. Simulation examples are provided to illustrate the performance of the proposed approaches.

Zhang, Lei; Li, Tongtong

388

25 CFR 900.217 - Is filing a claim under the CDA our only option for resolving post-award contract disputes?  

Code of Federal Regulations, 2013 CFR

...AFFAIRS, DEPARTMENT OF THE INTERIOR, AND INDIAN HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES CONTRACTS UNDER THE INDIAN...of the Administrative Dispute Resolution Act, Public Law 101-552, as amended, 5 U.S.C. 581 et...

2013-04-01

389

Day-night net filed-aligned current system deduced from satellite data : storm time field-aligned currents  

NASA Astrophysics Data System (ADS)

The present study examines the polar distribution of field-aligned currents (FACs) at storm time. The existence of day-night net field-aligned currents was confirmed with the data obtained by Defense Meteorological Satellite Program(DMSP)-F7, F12, F13, F14 and F15 satellites in the high latitude region. The location and current density of FACs were investigated during geomagnetic storm events as well as under geomagnetically quiet conditions. The polar distribution of the region-2 FAC system was found to rotates westward when the ASY-H index is large. This skew of the region-2 FAC distribution is considered to be caused by the plasma pressure distribution in the ring current region and the divergence of the ionospheric Hall current owing to the conductivity discontinuity at the poleward boundary of the auroral oval. The plasma presure in the ring current region is highest around pre-midnight during main phase of the magnetic storm. This distortion of the region-2 FAC distribution results in day-night net currents, which flow into and out of the ionosphere on the dayside and nightside. The total current intensity of the day-night net FACs is about several million amperes under a geomagnetically disturbed condition and is enough to explain the observed dawn-dusk asymmetry of magnetic field disturbances.

Yamashita, S.; Ohtani, S.; Ueno, G.; Higuchi, T.; Iyemori, T.

2003-04-01

390

78 FR 11634 - Combined Notice of Filings #1  

Federal Register 2010, 2011, 2012, 2013

...Independent Transmission System Operator, Inc. submits tariff filing per 35.13(a)(2)(iii: 2013-02-08 UDS-SCADA Filing 40.2.14 to be effective 4/9/2013. Filed Date: 2/8/13. Accession Number: 20130208-5017. Comments...

2013-02-19

391

77 FR 22566 - Combined Notice of Filings #1  

Federal Register 2010, 2011, 2012, 2013

...New York Independent System Operator, Inc. submits tariff filing per 35: NYISO Compliance filing--Verification of MP Risk Mgmt Policies and Procedures to be effective 6/30/2012. Filed Date: 4/5/12. Accession Number: 20120405-5146....

2012-04-16

392

49 CFR 1152.12 - Filing and publication.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Filing and publication. 1152.12 Section 1152.12 ...System Diagram § 1152.12 Filing and publication. (a) Each carrier required to...descriptions in conformance with the filing and publication requirements of this section....

2011-10-01

393

49 CFR 1152.12 - Filing and publication.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Filing and publication. 1152.12 Section 1152.12 ...System Diagram § 1152.12 Filing and publication. (a) Each carrier required to...descriptions in conformance with the filing and publication requirements of this section....

2012-10-01

394

Optimal File-Bundle Catching Algorithms for Data-Grids.  

National Technical Information Service (NTIS)

The file-bundle caching problem arises frequently in scientific applications where jobs need to process several files simultaneously. Consider a host system in a data-grid that maintains a staging disk or disk cache for servicing jobs of file requests. In...

E. Otoo D. Rotem A. Romosan

2004-01-01

395

76 FR 44373 - Notice of Opportunity To File Amicus Briefs  

Federal Register 2010, 2011, 2012, 2013

...PROTECTION BOARD Notice of Opportunity To File Amicus Briefs AGENCY: Merit Systems Protection...The Board announces the opportunity to file amicus briefs in the matters of James C...DA-0353-10-0408-I-1, Initial Appeal File, Tab 21, Subtab 7. It therefore...

2011-07-25

396

A robotic assistant system for cardiac interventions under MRI guidance  

NASA Astrophysics Data System (ADS)

In this paper we present a surgical assistant system for implanting prosthetic aortic valve transapically under MRI guidance, in a beating heart. The system integrates an MR imaging system, a robotic system, as well as user interfaces for a surgeon to plan the procedure and manipulate the robot. A compact robotic delivery module mounted on a robotic arm is used for delivering both balloon-expandable and self-expanding prosthesis. The system provides different user interfaces at different stages of the procedure. A compact fiducial pattern close to the volume of interest is proposed for robot registration. The image processing and the transformation recovery methods using this fiducial in MRI are presented. The registration accuracy obtained by using this compact fiducial is comparable to the larger multi-spherical marker registration method. The registration accuracy using these two methods is less than 0.62+/-0.50 deg (mean +/- std. dev.) and 0.63+/-0.72 deg (mean +/- std. dev.), respectively. We evaluated each of the components and show that they can work together to form a complete system for transapical aortic valve replacement.

Li, Ming; Mazilu, Dumitru; Wood, Bradford J.; Horvath, Keith A.; Kapoor, Ankur

2010-03-01

397

Inelastic collapse in one-dimensional driven systems under gravity  

NASA Astrophysics Data System (ADS)

We study inelastic collapse in a one-dimensional N-particle system when the system is driven from below under gravity. We investigate the hard-sphere limit of inelastic soft-sphere systems by numerical simulations to find how the collision rate per particle ncoll increases as a function of the elastic constant of the sphere k when the restitution coefficient e is kept constant. For systems with large enough N?20, we find three regimes in e depending on the behavior of ncoll in the hard-sphere limit: (i) an uncollapsing regime for 1?e>ec1, where ncoll converges to a finite value, (ii) a logarithmically collapsing regime for ec1>e>ec2, where ncoll diverges as ncoll˜logk, and (iii) a power-law collapsing regime for ec2>e>0, where ncoll diverges as ncoll˜k? with an exponent ? that depends on N. The power-law collapsing regime shrinks as N decreases and seems not to exist for the system with N=3, while, for large N, the size of the uncollapsing and the logarithmically collapsing regime decreases as ec1?1-2.6/N and ec2?1-3.0/N. We demonstrate that this difference between large and small systems exists already in the inelastic collapse without external drive and gravity.

Wakou, Jun'ichi; Kitagishi, Hiroyuki; Sakaue, Takahiro; Nakanishi, Hiizu

2013-04-01

398

Experimental System Setup for HIFU under MRI for mouse experiments  

NASA Astrophysics Data System (ADS)

We describe an integrated system setup for HIFU and MRI thermometry for mouse experiments. The applications of such a system include MRI imaging and thermometry for evaluation and feedback during HIFU applications on mouse models of various diseases; and validation of temperature estimated by other methods, such as RF data. A 5 MHz geometrically focused (diameter of 16.1 mm, focal length 35 mm), MRI-compatible HIFU transducer is used, driven by a programmable signal generator and a power amplifier. The small animal MRI scanner has been programmed to acquire sequential phase information, which is used to determine frequency shift. Relative temperature rise is then calculated by proton resonance frequency (RPF) method. The current software development is done in C++ and Matlab. An integrated software is being developed to streamline the acquisition, analysis and visualization during HIFU delivery. Preliminary experiments have been performed using different phantoms. Performing HIFU (less than 100 watts) under MRI has had minimal interference for MRI data acquisition. The development is continuing for further characterizing and understanding the interference at the higher power level and accelerate data acquisition rate to achieve thermometry for a few frames per second. Further tissue experiments are under way with target of live mouse experiments. We present the overall design and discuss challenges encountered in the development of such system for experiments on mouse.

Long, Tao; Amin, Viren; Boska, Michael

2009-04-01

399

Analytical theory for the description of powder systems under compression  

NASA Astrophysics Data System (ADS)

In this work, a new theoretical approach to modelling some properties of powder systems under compression is presented. This new theoretical route consists of modelling an actual powder system (with particles of unequal size and irregular form) by means of a system of deforming spheres in a simple cubic arrangement and with a certain global porosity that, in some way, makes it equivalent to the actual one. The study of the evolution of the effective contact area between particles and the effective path of the electric or thermal flow through the powder aggregate is the starting point for establishing the equivalence relationship between the actual system and the simple cubic one. In order to exemplify the utility of this new theoretical tool, two classic problems of practical interest have been studied: the electrical conduction in sintered powders and the law governing the powders’ cold die compaction. The proposed solutions to these problems, as well as the equations allowing one to obtain the equivalence relationship, are validated by experiments carried out in actual powder systems.

Montes, J. M.; Cuevas, F. G.; Cintas, J.

2010-06-01

400

Comparative evaluation of the sealing ability of different obturation systems used over apically separated rotary nickel-titanium files: An in vitro study  

PubMed Central

Aim: The study was designed to investigate the sealing ability of two obturation systems (cold laterally compacted gutta percha and Obtura II) over different apically separated rotary nickel-titanium files (RACE and K3 system) using dye extraction method. Materials and Methods: Sixty-two mandibular premolars were divided into 2 groups of 30 teeth each, and 2 teeth served as negative controls. In Groups A and B, roots were prepared using RACE and K3 system, respectively, and were further subdivided into 4 subgroups. In subgroups A1, B1 and A2, B2 (n = 10 each), files were separated at 3 mm from the tip in apical 3rd of the canal. In subgroups A3, B3 and A4, B4 (n = 5), instruments were not separated. Subgroups A1, A3, B1, B3 and A2, A4, B2, B4 were obturated by lateral condensation method and Obtura II techniques, respectively. The sealing ability of the obturated specimens were tested using dye extraction method. The values for each group were recorded and analysis of variance (ANOVA), Student “t” test (two-tailed, independent), and Leven's test were performed. Results: Group A1 showed significantly less leakage than B1. No statistical significant difference between Groups A2 and B2 and Groups A3 and B3, respectively, were observed. Group A4 showed significantly less leakage than B4. Conclusion: Groups obturated with Obtura II showed less leakage than the lateral condensation technique irrespective of presence or absence of fractured NiTi rotary system.

Hegde, Jayshree; Bashetty, Kusum; Kumar, Krishna K; Chikkamallaiah, Champa

2013-01-01

401

An inconvenient truth : file-level metadata and in-file metadata caching in the (file-agnostic) ATLAS event store.  

SciTech Connect

In the ATLAS event store, files are sometimes 'an inconvenient truth.' From the point of view of the ATLAS distributed data management system, files are too small - datasets are the units of interest. From the point of view of the ATLAS event store architecture, files are simply a physical clustering optimization: the units of interest are event collections - sets of events that satisfy common conditions or selection predicates - and such collections may or may not have been accumulated into files that contain those events and no others. It is nonetheless important to maintain file-level metadata, and to cache metadata in event data files. When such metadata may or may not be present in files, or when values may have been updated after files are written and replicated, a clear and transparent model for metadata retrieval from the file itself or from remote databases is required. In this paper we describe how ATLAS reconciles its file and non-file paradigms, the machinery for associating metadata with files and event collections, and the infrastructure for metadata propagation from input to output for provenance record management and related purposes.

Malon, D.; van Gemmeren, P.; Hawkings, R.; Schaffer, A.; High Energy Physics; CERN; Univ. Paris-Sud

2008-01-01

402

78 FR 27217 - Combined Notice of Filings  

Federal Register 2010, 2011, 2012, 2013

...Numbers: RP13-845-000. Applicants: ETC Tiger Pipeline, LLC. Description: ETC Tiger 2013--System Map Filing to be effective 6...Numbers: RP13-859-000. Applicants: ETC Tiger Pipeline, LLC. Description: ETC Tiger...

2013-05-09

403

12 CFR 1412.7 - Filing instructions.  

Code of Federal Regulations, 2013 CFR

...Banking FARM CREDIT SYSTEM INSURANCE CORPORATION GOLDEN PARACHUTE AND INDEMNIFICATION PAYMENTS § 1412.7 Filing instructions...nondiscriminatory severance plan payments and permitted golden parachute payments shall be submitted in writing to the FCA and the...

2013-01-01

404

Common Carrier Cumulative Staff Study Data File.  

National Technical Information Service (NTIS)

Cumulative Staff Study - A weekly report by frequency produced by Common Carrier Land Mobile System. Data on report are: Frequency, longitude, latitude, state, applicant name, call sign, received date, public notice date, file number, and application type...

J. Colbert

1988-01-01

405

48 CFR 908.7105 - Filing cabinets.  

Code of Federal Regulations, 2012 CFR

... 908.7105 Section 908.7105 Federal Acquisition Regulations System DEPARTMENT OF ENERGY COMPETITION ACQUISITION PLANNING REQUIRED SOURCES OF SUPPLIES AND SERVICES Acquisition of Special Items 908.7105 Filing...

2012-10-01

406

48 CFR 908.7105 - Filing cabinets.  

Code of Federal Regulations, 2011 CFR

... 908.7105 Section 908.7105 Federal Acquisition Regulations System DEPARTMENT OF ENERGY COMPETITION ACQUISITION PLANNING REQUIRED SOURCES OF SUPPLIES AND SERVICES Acquisition of Special Items 908.7105 Filing...

2011-10-01

407

Programmer's Reference Guide to FDMS File Formats.  

National Technical Information Service (NTIS)

Fire Data Management System, FDMS, is a computer database specifically designed to store and retrieve fire test results. The guide provides detailed descriptions of the current, beta version, file formats as well as revisions planned for the immediate fut...

R. W. Portier

1993-01-01

408

Programmer's reference guide to FDMS file formats  

NASA Astrophysics Data System (ADS)

Fire Data Management System, FDMS, is a computer database specifically designed to store and retrieve fire test results. The guide provides detailed descriptions of the current, beta version, file formats as well as revisions planned for the immediate future.

Portier, R. W.

1993-04-01

409

Mathematical modeling of the behavior of geothermal systems under exploitation  

SciTech Connect

Analytical and numerical methods have been used in this investigation to model the behavior of geothermal systems under exploitation. The work is divided into three parts: (1) development of a numerical code, (2) theoretical studies of geothermal systems, and (3) field applications. A new single-phase three-dimensional simulator, capable of solving heat and mass flow problems in a saturated, heterogeneous porous or fractured medium has been developed. The simulator uses the integrated finite difference method for formulating the governing equations and an efficient sparse solver for the solution of the linearized equations. In the theoretical studies, various reservoir engineering problems have been examined. These include (a) well-test analysis, (b) exploitation strategies, (c) injection into fractured rocks, and (d) fault-charged geothermal reservoirs.

Bodvarsson, G.S.

1982-01-01

410

Modeling municipal solid waste management system under uncertainty.  

PubMed

In this study, a dynamic inexact waste management (DIWM) model is developed for identifying optimal waste-flow-allocation and facility-capacity-expansion strategies under uncertainty and is based on an inexact scenario-based probabilistic programming (ISPP) approach. The DIWM model can handle uncertainties presented as interval values and probability distributions, and it can support assessing the risk of violating system constraints. Several violation levels for facility-capacity and waste-diversion constraints are examined. Solutions associated with different risks of constraint violation were generated. The modeling results are valuable for supporting the planning of the study city's municipal solid waste (MSW) management practices, the long-term capacity expansion for waste management system, and the identification of desired policies regarding waste diversion. Sensitivity analyses are also undertaken to demonstrate that the violations of different constraints have varied effects on the planning of waste-flow allocation, facility expansion, and waste management cost. PMID:20437779

Li, Yongping; Huang, Guohe

2010-04-01

411

[The erythrocyte and plasma glutathione system under peptic ulcer].  

PubMed

In erythrocytes and blood plasma of patients with the complicated peptic ulcer and postresectional syndromes there was the increase of conjugated dienes (and in the second group the increase in antioxidant activity). Under these conditions the main change was the sharp and identical decrease in glutathione activity. In patients with uncomplicated peptic ulcer there was sharp increase in erythrocyte and plasma glutathione activity and plasma GSH. In operated but basically healthy patients plasma glutathione peroxidase remained decreased but plasma GSH sharply increased. Evidently complicated peptic ulcer is characterized by decreased functioning of the glutathione system. Activation of this system and the decrease or disappearance of manifestations of oxidative stress are associated with a favorable course of this disease, especially at uncomplicated peptic ulcer. The revealed changes significantly differ from those observed in viral hepatitis, bile excretory treat diseases and strokes. PMID:19105403

Kulinski?, V I; Shcherbatykh, A V; Bol'sheshapov, A A; Bakhtairova, V I; Bulavintseva, O A; Egorova, I E; Suslova, A I; Ias'ko, M V; Kolbaseeva, O V; Noskova, L K

412

Extreme value laws in dynamical systems under physical observables  

NASA Astrophysics Data System (ADS)

Extreme value theory for chaotic deterministic dynamical systems is a rapidly expanding area of research. Given a system and a real function (observable) defined on its phase space, extreme value theory studies the limit probabilistic laws obeyed by large values attained by the observable along orbits of the system. Based on this theory, the so-called block maximum method is often used in applications for statistical prediction of large value occurrences. In this method, one performs statistical inference for the parameters of the Generalised Extreme Value (GEV) distribution, using maxima over blocks of regularly sampled observable values along an orbit of the system. The observables studied so far in the theory are expressed as functions of the distance with respect to a point, which is assumed to be a density point of the system's invariant measure. However, at least with respect to the ambient (usually Euclidean) metric, this is not the structure of the observables typically encountered in physical applications, such as windspeed or vorticity in atmospheric models. In this paper we consider extreme value limit laws for observables which are not expressed as functions of the distance (in the ambient metric) from a density point of the dynamical system. In such cases, the limit laws are no longer determined by the functional form of the observable and the dimension of the invariant measure: they also depend on the specific geometry of the underlying attractor and of the observable's level sets. We present a collection of analytical and numerical results, starting with a toral hyperbolic automorphism as a simple template to illustrate the main ideas. We then formulate our main results for a uniformly hyperbolic system, the solenoid map. We also discuss non-uniformly hyperbolic examples of maps (Hénon and Lozi maps) and of flows (the Lorenz63 and Lorenz84 models). Our purpose is to outline the main ideas and to highlight several serious problems found in the numerical estimation of the limit laws.

Holland, Mark P.; Vitolo, Renato; Rabassa, Pau; Sterk, Alef E.; Broer, Henk W.

2012-03-01

413

Phasmida Species File Online  

NSDL National Science Digital Library

The Phasmida Species File (PSF) is a taxonomic database of the world's Phasmida (stick and leaf insects, known as walking sticks and walking leaves in the U.S.). It provides useful and accessible information for professional taxonomists and systematists, such as full synonymic and taxonomic information for over 2,700 valid species and 3,900 taxonomic names (all ranks, valid and not valid), and over 11,000 citations to references. The PSF home page also lists phasmid specialists by geographic location, so users can email them with questions. What makes the PSF stand out as excellent is the substantial amount of documentation and "help" features to guide users. This makes the site easily-accessible to professionals as well as students and educators with more general interests (e.g., rearing records and photographs). If you are not sure where to start looking, or if you are interested in how the database is constructed, use the home page links listed under "Other Places to Start". For information and statistics about the current status of the database (as of October 2006), click on the "About this website and the underlying database" link on the home page.

0002-11-30

414

Flash Memory File Caching for Mobile Computers  

Microsoft Academic Search

We examine the impact of using flash memory as a second-level file system buffer cache to reduce power consumption and file access latency on a mobile computer. We use trace-driven simulation to evaluate the impact of what we call a FLASHCACHE. We relate the power consumption and access latency of the storage sub-system to the characteristics of the FLASHCACHE: its

Brian Marsh; Fred Douglis; P. Krishnan

1994-01-01

415

Hopper File Management Tool  

SciTech Connect

Hopper is a powerful interactive tool that allows users to transfer and manipulate files and directories by means of a graphical user interface. Users can connect to and manage resources using the major file transfer protocols. Implemented in Java, Hopper can be run almost anywhere: from an individual's desktop machine to large production machines. In a high-performance computing environment, managing files can become a difficult and time-consuming task that distracts from scientific work. Users must deal with multiple file transfer protocols, transferring enormous amounts of files between computer platforms, repeated authentication, organizing massive amounts of data, and other detailed but necessary tasks. This is often accomplished with a set of several different tools, each with its own interface and idiosyncrasies. Our goal is to develop tools for a more automated approach to file management that substantially improves users' ability to transfer, organize, search, and operate on collections of files. This paper describes the Hopper tool for advanced file management, including the software architecture, the functionality, and the user interface.

Long, J W; O'Neill, N J; Smith, N G; Springmeyer, R R; Remmele, S; Richards, D A; Southon, J

2004-11-15

416

Frank Sinatra FBI Files  

NSDL National Science Digital Library

On December 8, the FBI released its 1,275-page file on Frank Sinatra, long rumored to be involved with organized crime. Sinatra first came to the Bureau's attention during World War II, when he bowled over bobby-soxers across the nation. The real focus of FBI investigations into Sinatra, however, was his frequent association with known mobsters. The released files contain no hard evidence of criminal activity on Sinatra's part and portray him as more of a groupie than a wiseguy. At present, the FBI does not plan to place the files on its Freedom of Information Act Reading Room site (described in the June 30, 1998 Scout Report for Social Sciences), but APB Online, a site specializing in police and crime news, has scanned the entire file and placed it online. Users can view the entire document or selected highlights in .gif image format or download the report as one file or in fourteen sections in .pdf format.

417

Operating Water Resources Systems Under Climate Change Scenarios  

NASA Astrophysics Data System (ADS)

Population and industrial growth has resulted in intense demands on the quantity and quality of water resources worldwide. Moreover, climate change/variability is making a growing percentage of the earth's population vulnerable to extreme weather events (drought and flood). The 1996 Saguenay flood, 1997 Red River flood, the 1998 ice storm, and recent droughts in prairies are few examples of extreme weather events in Canada. Rising economic prosperity, growth in urban population, aging infrastructure, and a changing climate are increasing the vulnerability of Canadians to even more serious impacts. This growing threat can seriously undermine the social and economic viability of the country. Our ability to understand the impacts of climate change/variability on water quantity, quality, and its distribution in time and space can prepare us for sustainable management of this precious resource. The sustainability of water resources, over the medium to long-term, is critically dependent on the ability to manage (plan and operate) water resource systems under a more variable and perhaps warmer future climate. Studying the impacts of climate change/variability on water resources is complex and challenging. It is further complicated by the fact that impacts vary with time and are different at different locations. This study deals with the impacts of climate change/variability on water resources in a portion of the Red River Basin in Canada, both in terms of change in quantity and spatial-temporal distribution. A System Dynamics model is developed to describe the operation of the Shellmouth Reservoir located on the Red River in Canada. The climate data from Canadian Global Coupled Model, CGCM1 is used. The spatial system dynamics approach, based on distributed parameter control theory, is used to model the impacts of climate change/variability on water resources in time and space. A decision support system is developed to help reservoir operators and decision makers in sustainable management of water resources. The decision support system helps in analyzing the impacts of different reservoir operation scenarios, under changing climate conditions, by exploring multiple- what-if- scenarios. Canadian study areas and data sets are used for the research. However, the proposed approach provides a general framework that can be used in other parts of the world.

Ahmad, S.

2002-12-01

418

Plasticity of the Arabidopsis root system under nutrient deficiencies.  

PubMed

Plant roots show a particularly high variation in their morphological response to different nutrient deficiencies. Although such changes often determine the nutrient efficiency or stress tolerance of plants, it is surprising that a comprehensive and comparative analysis of root morphological responses to different nutrient deficiencies has not yet been conducted. Since one reason for this is an inherent difficulty in obtaining nutrient-deficient conditions in agar culture, we first identified conditions appropriate for producing nutrient-deficient plants on agar plates. Based on a careful selection of agar specifically for each nutrient being considered, we grew Arabidopsis (Arabidopsis thaliana) plants at four levels of deficiency for 12 nutrients and quantified seven root traits. In combination with measurements of biomass and elemental concentrations, we observed that the nutritional status and type of nutrient determined the extent and type of changes in root system architecture (RSA). The independent regulation of individual root traits further pointed to a differential sensitivity of root tissues to nutrient limitations. To capture the variation in RSA under different nutrient supplies, we used principal component analysis and developed a root plasticity chart representing the overall modulations in RSA under a given treatment. This systematic comparison of RSA responses to nutrient deficiencies provides a comprehensive view of the overall changes in root plasticity induced by the deficiency of single nutrients and provides a solid basis for the identification of nutrient-sensitive steps in the root developmental program. PMID:23852440

Gruber, Benjamin D; Giehl, Ricardo F H; Friedel, Swetlana; von Wirén, Nicolaus

2013-07-12

419

[Single file endodontic treatment: a new era?].  

PubMed

Root canal shaping is one of the key stages of endodontic treatment, when performed properly, it is a predictive factor for the outcome of the treatment. It is critical for an adequate disinfection, which is more effective at the completion of a proper shaping procedure. The introduction of NiTi instruments into endodontic greatly improved the root canal shaping and decreased the time required for a full mechanical preparation. Over the last 2 decades, numerous attempts have been made to further improve the procedure with a wide range of rotary NiTi endodontic file systems. All these systems require several subsequent files. Recently, three different concepts of single-file systems have been introduced: 1. The single file reciprocating working motion: it consists of a reciprocating counterclockwise and a clockwise motion. This reciprocal motion reduces torsional loads thus, allows safer instrumentation with less working time. 2. Single-file instrumentation using full 360 degrees rotational movement to be used in a full clockwise rotation. Some of these files also have an Anti Breakage Control (ABC) which protects from catastrophic procedural malfunction by unwinding of these file before breakage. 3. The Self-Adjusting File (SAF) which is a thin-walled, pointed cylinder, hollow nickel-titanium endodontic file that is elastically compressible into a root canal that has been previously negotiated using a #20 hand file and can widened inside it, facilitating removal of debris and dentin from the canal wall. The file conforms to the canal shape and permits irrigant flow through the file. The SAF works in a combined vibrating and partial rotational motions, and circumferentially simultaneously enlarging and irrigating the canal. The objectives of these new approaches is to reduce the working time and cost and improve safety of the shaping procedure, and suggest to have a lower procedural errors incidents. Few studies, conducted in the recent years, using these new instruments demonstrated an excellent shaping and centering ability of these new systems. They produce smooth tapered canal preparations with reproducible results, even when performed by less experienced practitioners. As mentioned above, these new techniques appeared to be promising, but further fundamental clinical and laboratory studies are needed to confirm their abilities. PMID:24020240

Shay, B; Moshonov, J

2013-04-01

420

Reliability of a Compound System under Consideration of the System Elements Prices.  

National Technical Information Service (NTIS)

Consideration is given to the economical and mathematical problem of selecting the N elements of a given system in such a way that the whole system be of maximum reliability and under the condition that the sum of the costs of the N elements is given and ...

A. Plucinska

1976-01-01

421

Orthoptera Species File Online  

NSDL National Science Digital Library

The Orthoptera Species File (Version 2.0/3.1) is a taxonomic database of the world's Orthoptera. It contains full synonymic and taxonomic information for more than 25,000 valid species and more than 39,000 taxonomic names, and has more than 140,000 citations to references Users can also access images and sound recordings for many species. The "Education Exercises" link has tools (in both English and Spanish) to learn about synonymic lists, the taxonomic history of a generic and specific name, type specimens, and valid names. There also are interactive keys for identifying and diagnosing species of Orthoptera and teaching users about the Linnaean hierarchy. Another useful resource on the home page is the list of experts and their contact information. The OSF is useful for professionals, students, educators and users with a general interest in Orthoptera. It stands out as excellent because it is well-documented, has many "help" features to guide users, and is associated with a well-respected group, the Orthopterists' Society. If you are not sure where to start looking, or if you are interested in how the database is constructed, use the home page links listed under "Other Places to Start".

0002-11-30

422

Selective File Dumper  

NASA Astrophysics Data System (ADS)

During a computer forensics investigation we faced a problem how to get all the interesting files we need fast. We work, mainly, using the Open Source software products and Linux OS, and we consider the Sleuthkit and the Foremost two very useful tools, but for reaching our target they were too complicated and time consuming to use. For this reason we developed the Selective File Dumper, a Linux Bash script which makes it possible to extract all the referenced, deleted and unallocated files and finally to perform a keyword search, in a simple way.

Bassetti, Nanni; Frati, Denis

423

48 CFR 30.202-5 - Filing disclosure statements.  

Code of Federal Regulations, 2011 CFR

...Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION GENERAL CONTRACTING REQUIREMENTS COST ACCOUNTING STANDARDS ADMINISTRATION CAS Program Requirements 30.202-5 Filing disclosure statements. See 48 CFR...

2011-10-01

424

ENSDF: the evaluated nuclear structure data file  

SciTech Connect

The structure, organization, and contents of the Evaluated Nuclear Structure Data File, ENSDF, will be discussed. This file summarizes the state of experimental nuclear structure data for all nuclei as determined from consideration of measurements reported worldwide. Special emphasis will be given to the data evaluation procedures and consistency checks utilized at the input stage and to the retrieval capabilities of the system at the output stage. 4 refs., 1 fig.

Martin, M.J.

1985-01-01

425

SIGACE Code for Generating High-Temperature ACE Files; Validation and Benchmarking  

NASA Astrophysics Data System (ADS)

A code named SIGACE has been developed as a tool for MCNP users within the scope of a research contract awarded by the Nuclear Data Section of the International Atomic Energy Agency (IAEA) (Ref: 302-F4-IND-11566 B5-IND-29641). A new recipe has been evolved for generating high-temperature ACE files for use with the MCNP code. Under this scheme the low-temperature ACE file is first converted to an ENDF formatted file using the ACELST code and then Doppler broadened, essentially limited to the data in the resolved resonance region, to any desired higher temperature using SIGMA1. The SIGACE code then generates a high-temperature ACE file for use with the MCNP code. A thinning routine has also been introduced in the SIGACE code for reducing the size of the ACE files. The SIGACE code and the recipe for generating ACE files at higher temperatures has been applied to the SEFOR fast reactor benchmark problem (sodium-cooled fast reactor benchmark described in ENDF-202/BNL-19302, 1974 document). The calculated Doppler coefficient is in good agreement with the experimental value. A similar calculation using ACE files generated directly with the NJOY system also agrees with our SIGACE computed results. The SIGACE code and the recipe is further applied to study the numerical benchmark configuration of selected idealized PWR pin cell configurations with five different fuel enrichments as reported by Mosteller and Eisenhart. The SIGACE code that has been tested with several FENDL/MC files will be available, free of cost, upon request, from the Nuclear Data Section of the IAEA.

Sharma, Amit R.; Ganesan, S.; Trkov, A.

2005-05-01

426

SIGACE Code for Generating High-Temperature ACE Files; Validation and Benchmarking  

SciTech Connect

A code named SIGACE has been developed as a tool for MCNP users within the scope of a research contract awarded by the Nuclear Data Section of the International Atomic Energy Agency (IAEA) (Ref: 302-F4-IND-11566 B5-IND-29641). A new recipe has been evolved for generating high-temperature ACE files for use with the MCNP code. Under this scheme the low-temperature ACE file is first converted to an ENDF formatted file using the ACELST code and then Doppler broadened, essentially limited to the data in the resolved resonance region, to any desired higher temperature using SIGMA1. The SIGACE code then generates a high-temperature ACE file for use with the MCNP code. A thinning routine has also been introduced in the SIGACE code for reducing the size of the ACE files. The SIGACE code and the recipe for generating ACE files at higher temperatures has been applied to the SEFOR fast reactor benchmark problem (sodium-cooled fast reactor benchmark described in ENDF-202/BNL-19302, 1974 document). The calculated Doppler coefficient is in good agreement with the experimental value. A similar calculation using ACE files generated directly with the NJOY system also agrees with our SIGACE computed results. The SIGACE code and the recipe is further applied to study the numerical benchmark configuration of selected idealized PWR pin cell configurations with five different fuel enrichments as reported by Mosteller and Eisenhart. The SIGACE code that has been tested with several FENDL/MC files will be available, free of cost, upon request, from the Nuclear Data Section of the IAEA.

Sharma, Amit R. [Institute for Plasma Research, Bhat, Gandhinagar-382428, Gujarat (India); Ganesan, S. [Reactor Physics Design Division, Bhabha Atomic Research Center, Mumbai-400085 (India); Trkov, A. [Nuclear Data Section, International Atomic Energy Agency, Vienna (Austria)

2005-05-24

427

20 CFR 321.1 - Filing applications electronically.  

Code of Federal Regulations, 2013 CFR

...Section 321.1 Employees' Benefits RAILROAD RETIREMENT BOARD...APPLICATIONS AND CLAIMS FOR BENEFITS UNDER THE RAILROAD UNEMPLOYMENT...filing. An application for benefits under the Railroad Unemployment...electronically through the Board's Internet Web site,...

2013-04-01

428

76 FR 2368 - Balance Power Systems, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes...  

Federal Register 2010, 2011, 2012, 2013

...Energy Regulatory Commission [Docket No. ER11-2331-000] Balance Power Systems, LLC; Supplemental Notice That Initial Market-Based...supplemental notice in the above-referenced proceeding of Balance Power Systems, LLC's application for market-based...

2011-01-13

429

Optimal Management and Design of Energy Systems under Atmospheric Uncertainty  

NASA Astrophysics Data System (ADS)

The generation and distpatch of electricity while maintaining high reliability levels are two of the most daunting engineering problems of the modern era. This was demonstrated by the Northeast blackout of August 2003, which resulted in the loss of 6.2 gigawatts that served more than 50 million people and which resulted in economic losses on the order of $10 billion. In addition, there exist strong socioeconomic pressures to improve the efficiency of the grid. The most prominent solution to this problem is a substantial increase in the use of renewable energy such as wind and solar. In turn, its uncertain availability—which is due to the intrinsic weather variability—will increase the likelihood of disruptions. In this endeavors of current and next-generation power systems, forecasting atmospheric conditions with uncertainty can and will play a central role, at both the demand and the generation ends. User demands are strongly correlated to physical conditions such as temperature, humidity, and solar radiation. The reason is that the ambient temperature and solar radiation dictate the amount of air conditioning and lighting needed in residential and commercial buildings. But these potential benefits would come at the expense of increased variability in the dynamics of both production and demand, which would become even more dependent on weather state and its uncertainty. One of the important challenges for energy in our time is how to harness these benefits while “keeping the lights on”—ensuring that the demand is satisfied at all times and that no blackout occurs while all energy sources are optimally used. If we are to meet this challenge, accounting for uncertainty in the atmospheric conditions is essential, since this will allow minimizing the effects of false positives: committing too little baseline power in anticipation of demand that is underestimated or renewable energy levels that fail to materialize. In this work we describe a framework for the optimal management and design of energy systems, such as the power grid or building systems, under atmospheric conditions uncertainty. The framework is defined in terms of a mathematical paradigm called stochastic programming: minimization of the expected value of the decision-makers objective function subject to physical and operational constraints, such as low blackout porbability, that are enforced on each scenario. We report results on testing the framework on the optimal management of power grid systems under high wind penetration scenarios, a problem whose time horizon is in the order of days. We discuss the computational effort of scenario generation which involves running WRF at high spatio-temporal resolution dictated by the operational constraints as well as solving the optimal dispatch problem. We demonstrate that accounting for uncertainty in atmospheric conditions results in blackout prevention, whereas decisions using only mean forecast does not. We discuss issues in using the framework for planning problems, whose time horizon is of several decades and what requirements this problem would entail from climate simulation systems.

Anitescu, M.; Constantinescu, E. M.; Zavala, V.

2010-12-01

430

Enhancing I/O Throughput via Efficient Routing and Placement for Large-scale Parallel File Systems.  

National Technical Information Service (NTIS)

As storage systems get larger to meet the demands of petascale systems, careful planning must be applied to avoid congestion points and extract the maximum performance. In addition, the large data sets generated by such systems makes it desirable for all ...

D. A. Dillow G. M. Shipman S. Oral Y. Kim Z. Zhang

2011-01-01

431

Drug Master Files (DMFs)  

Center for Drug Evaluation (CDER)

... Guidance for Industry: ANDAs: Stability Testing of Drug Substances and Products ... Files (DMF guidance) The version posted on the web is the ... More results from www.fda.gov/drugs/developmentapprovalprocess/formssubmissionrequirements

432

Formatted File Organization Techniques.  

National Technical Information Service (NTIS)

The report contains papers presenting several useful steps toward the creation of a more scientific discipline of formatted file design. In particular, there are papers on: (1) The first extensive, fundamentally oriented comparison of key-to-address trans...

M. E. Senko V. Y. Lum F. P. Palermo S. P. Ghosh P. J. Owens

1970-01-01

433

Commercial Master File.  

National Technical Information Service (NTIS)

Contains a listing of commercial operator and restricted operator licensees in operator name sequence. A cross-reference of commercial operators by serial number is also included. File only covers last seven years.

1988-01-01

434

28 CFR 16.89 - Exemption of Civil Division Systems-limited access.  

Code of Federal Regulations, 2010 CFR

...Exemption of Civil Division Systems-limited access...DEPARTMENT OF JUSTICE PRODUCTION...of Records Systems Under the Privacy...Exemption of Civil Division Systems... (1) Civil Division Case File System,...

2010-07-01

435

Ground fault and overcurrent protection criteria for coal mine AC distribution systems. Open file report August 1979-October 1980  

SciTech Connect

Ground fault and overcurrent protection criteria for coal mine ac distribution systems were examined by authorization of the Bureau of Mines. The report begins with a literature review that discusses relaying topics including instrument transformers, ground fault pickup methods, static relaying, and comparison of relaying techniques. A chapter on ground fault relaying provides recommendations for maximum and minimum pickup levels as a function of maximum ground current and power system line-to-ground capacitance. Research in the area of phase overcurrent protection has resulted in a complete set of procedural recommendations for the selection and setting of overcurrent relays and current transformers, molded-case circuit breakers, and distribution system fuses in coal mine power systems. The final chapter discusses relay system maintenance and introduces a unique test set that is used to test the performance of relaying systems in coal mines.

Kiefer, J.A.; Kohler, J.L.

1980-10-31

436

Dopaminergic system as the mechanism underlying personality in a beetle.  

PubMed

Individuals in many animal species exhibit 'personality,' consistent differences in behaviour across time, situations and/or contexts. Previous work has revealed a negative genetic correlation between intensity of tonic immobility and walking activity levels in the confused flour beetle, Tribolium confusum, thus suggesting these beetles exhibit personality in activity-related traits. The present study investigated the mechanism underlying this correlation. We used individuals derived from two strains established via artificial divergent selection for duration of tonic immobility. "Long" (L) strains exhibited higher frequencies and longer durations of tonic immobility, and lower activity levels, while "Short" (S) strains exhibited lower frequencies and shorter durations of tonic immobility and higher activity levels. We found that the duration of tonic immobility, and activity level, could be altered by caffeine administration; L strains fed with caffeine exhibited decreased durations of tonic immobility and increased activity levels. We also found that brain dopamine levels were lower in L strains than in S strains. Consequently, this study demonstrates that the dopaminergic system plays an important part in controlling the genetic correlation between tonic immobility and activity levels in this species. PMID:22414537

Nakayama, Satoshi; Sasaki, Ken; Matsumura, Kentarou; Lewis, Zenobia; Miyatake, Takahisa

2012-03-10

437

Construction of file database management  

SciTech Connect

This work created a database for tracking data analysis files from multiple lab techniques and equipment stored on a central file server. Experimental details appropriate for each file type are pulled from the file header and stored in a searchable database. The database also stores specific location and self-directory structure for each data file. Queries can be run on the database according to file type, sample type or other experimental parameters. The database was constructed in Microsoft Access and Visual Basic was used for extraction of information from the file header.

MERRILL,KYLE J.

2000-03-01

438

Modifications made to an interactive computer system for evaluating coal mine illumination. Open file report (final) Sep 78Jul 80  

Microsoft Academic Search

A computer system for calculating the illumination on coal mine surfaces due to machine-mounted lights is described. Utilizing numerical models of mining machinery and measured data on luminaire output characteristics, the program computes the foot-candle levels incident on the mine surfaces. Shadowing effects of the machine are taken into account. The system operates, interactively from a Tektronix 4014 graphics terminal

Goldstein

1980-01-01

439

7 CFR 1.325 - Form, filing and service of papers.  

Code of Federal Regulations, 2012 CFR

... false Form, filing and service of papers. 1.325 Section 1.325 Agriculture...1.325 Form, filing and service of papers. (a) Form. (1) The original and two copies of all papers in a proceeding conducted under...

2012-01-01

440

7 CFR 1.325 - Form, filing and service of papers.  

Code of Federal Regulations, 2013 CFR

... false Form, filing and service of papers. 1.325 Section 1.325 Agriculture...1.325 Form, filing and service of papers. (a) Form. (1) The original and two copies of all papers in a proceeding conducted under...

2013-01-01

441

41 CFR 60-30.4 - Form, filing, service of pleadings and papers.  

Code of Federal Regulations, 2013 CFR

...Form, filing, service of pleadings and papers. 60-30.4 Section 60-30.4...Form, filing, service of pleadings and papers. (a) Form. The original of all pleadings and papers in a proceeding conducted under...

2013-07-01

442

30 CFR 291.106 - How do I file a complaint?  

Code of Federal Regulations, 2013 CFR

...SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR APPEALS OPEN AND NONDISCRIMINATORY ACCESS TO OIL AND GAS PIPELINES UNDER THE OUTER CONTINENTAL SHELF LANDS ACT § 291.106 How do I file a complaint? To file a complaint...

2013-07-01

443

20 CFR 217.7 - Claim filed with the Social Security Administration.  

Code of Federal Regulations, 2013 CFR

... true Claim filed with the Social Security Administration. 217.7 ...217.7 Claim filed with the Social Security Administration. (a) Claim...benefits under title II of the Social Security Act is an application...

2013-04-01

444

78 FR 19354 - Aviation Proceedings, Agreements Filed the Week Ending March 16, 2013  

Federal Register 2010, 2011, 2012, 2013

...DEPARTMENT OF TRANSPORTATION Office of the Secretary Aviation Proceedings, Agreements Filed the Week Ending March 16, 2013 The following Agreements were filed with the Department of Transportation under the Sections 412 and 414 of...

2013-03-29

445

A secure file manager for UNIX  

SciTech Connect

The development of a secure file management system for a UNIX-based computer facility with supercomputers and workstations is described. Specifically, UNIX in its usual form does not address: (1) Operation which would satisfy rigorous security requirements. (2) Online space management in an environment where total data demands would be many times the actual online capacity. (3) Making the file management system part of a computer network in which users of any computer in the local network could retrieve data generated on any other computer in the network. The characteristics of UNIX can be exploited to develop a portable, secure file manager which would operate on computer systems ranging from workstations to supercomputers. Implementation considerations making unusual use of UNIX features, rather than requiring extensive internal system changes, are described, and implementation using the Cray Research Inc. UNICOS operating system is outlined.

DeVries, R.G.

1990-12-31

446

48 CFR 4.802 - Contract files.  

Code of Federal Regulations, 2011 CFR

...Federal Acquisition Regulations System 1 2011-10-01 2011-10-01...Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION...and, if needed, a locator system should be established to ensure...retain contract files in any medium (paper, electronic,...

2011-10-01

447

Modifications made to an interactive computer system for evaluating coal mine illumination. Open file report (final) Sep 78-Jul 80  

SciTech Connect

A computer system for calculating the illumination on coal mine surfaces due to machine-mounted lights is described. Utilizing numerical models of mining machinery and measured data on luminaire output characteristics, the program computes the foot-candle levels incident on the mine surfaces. Shadowing effects of the machine are taken into account. The system operates, interactively from a Tektronix 4014 graphics terminal that handles all input-output functions. The software is installed on a Cyber 74 computer that communicates with the terminal by a telephone line. Several modifications to the system are described, the most important of which provides the ability to analyze surface mine lighting.

Goldstein, R.

1980-08-01

448

Systems under Intelligent Distributed DoS Attacks  

Microsoft Academic Search

In the framework of a set of clients communicating with a critical server over the Internet, a recent approach to protect communication from Distributed Denial of Service (DDoS) attacks involves the usage of overlay systems. SOS, MAYDAY and I3 are such systems. The overlay system serves as an intermediate forwarding system between the clients and the server, where the systems

Xun Wang; Sriram Chellappan; Phillip Boyer; Dong Xuan

449

DRUG MASTER FILES UNDER GDUFA: DMF Basics  

Center for Drug Evaluation (CDER)

Text Version... to new AP. • When holder changes name the DMF holder should issue a new LOA and send a copy to all APs. • It is not ... More results from www.fda.gov/downloads/drugs/developmentapprovalprocess

450

36 CFR 1234.20 - Creation and use of data files.  

Code of Federal Regulations, 2010 CFR

...Records § 1234.20 Creation and use of data files. (a) For electronic information systems that produce, use, or store data files, disposition instructions for the data shall be incorporated into the system's design. (b)...

2009-07-01

451

Model evaluation of denitrification under rapid infiltration basin systems  

NASA Astrophysics Data System (ADS)

Rapid Infiltration Basin Systems (RIBS) are used for disposing reclaimed wastewater into soil to achieve additional treatment before it recharges groundwater. Effluent from most new sequenced batch reactor wastewater treatment plants is completely nitrified, and denitrification (DNF) is the main reaction for N removal. To characterize effects of complex surface and subsurface flow patterns caused by non-uniform flooding on DNF, a coupled overland flow-vadose zone model is implemented in the multiphase flow and reactive transport simulator TOUGHREACT. DNF is simulated in two representative soils varying the application cycle, hydraulic loading rate, wastewater quality, water table depth, and subsurface heterogeneity. Simulations using the conventional specified flux boundary condition under-predict DNF by as much as 450% in sand and 230% in loamy sand compared to predictions from the coupled overland flow-vadose zone model, indicating that simulating coupled flow is critical for predicting DNF in cases where hydraulic loading rates are not sufficient to spread the wastewater over the whole basin. Smaller ratios of wetting to drying time and larger hydraulic loading rates result in greater water saturations, more anoxic conditions, and faster water transport in the vadose zone, leading to greater DNF. These results in combination with those from different water table depths explain why reported DNF varied with soil type and water table depth in previous field investigations. Across all simulations, cumulative percent DNF varies between 2 and 49%, indicating that NO3 removal in RIBS may vary widely depending on operational procedures and subsurface conditions. These modeling results improve understanding of DNF in RIBS and suggest operational procedures that may improve NO3 removal.

Akhavan, Maryam; Imhoff, Paul T.; Andres, A. Scott; Finsterle, Stefan

2013-09-01

452

Model evaluation of denitrification under rapid infiltration basin systems.  

PubMed

Rapid Infiltration Basin Systems (RIBS) are used for disposing reclaimed wastewater into soil to achieve additional treatment before it recharges groundwater. Effluent from most new sequenced batch reactor wastewater treatment plants is completely nitrified, and denitrification (DNF) is the main reaction for N removal. To characterize effects of complex surface and subsurface flow patterns caused by non-uniform flooding on DNF, a coupled overland flow-vadose zone model is implemented in the multiphase flow and reactive transport simulator TOUGHREACT. DNF is simulated in two representative soils varying the application cycle, hydraulic loading rate, wastewater quality, water table depth, and subsurface heterogeneity. Simulations using the conventional specified flux boundary condition under-predict DNF by as much as 450% in sand and 230% in loamy sand compared to predictions from the coupled overland flow-vadose zone model, indicating that simulating coupled flow is critical for predicting DNF in cases where hydraulic loading rates are not sufficient to spread the wastewater over the whole basin. Smaller ratios of wetting to drying time and larger hydraulic loading rates result in greater water saturations, more anoxic conditions, and faster water transport in the vadose zone, leading to greater DNF. These results in combination with those from different water table depths explain why reported DNF varied with soil type and water table depth in previous field investigations. Across all simulations, cumulative percent DNF varies between 2 and 49%, indicating that NO? removal in RIBS may vary widely depending on operational procedures and subsurface conditions. These modeling results improve understanding of DNF in RIBS and suggest operational procedures that may improve NO? removal. PMID:23835290

Akhavan, Maryam; Imhoff, Paul T; Andres, A Scott; Finsterle, Stefan

2013-06-03

453

Interaction of radio transmissions on mine monitoring and control systems. Open File report, September 1982-July 1985  

SciTech Connect

The report describes the creation of an efficient method to determine if command, control, communication, and monitoring (3CM) equipment in coal, metal, and nonmetal mines is susceptible to radio frequency interference (RFI) from the medium-frequency (MF) radio communications system. A qualitative and quantitative RFI test plan was developed for in-mine and laboratory evaluation of the equipment. The laboratory testing was accomplished using the transverse electromagnetic wave (TEM) test chamber. Detailed information on the test plan and the TEM test chamber is included. During in-mine testing of the MF system, some underground equipment malfunctioned when the transmitter's radiating antenna was in close proximity. Electromagnetic compatibility (EMC) testing was done on three levels: component (circuit or box), subsystems, and system. Nine tables are included which that the results of testing various equipment for RFI.

Stolarczyk, L.G.

1985-07-01

454

Aseismic Hybrid Control System for Building Structures under Strong Earthquake  

Microsoft Academic Search

Two aseismic hybrid control systems recently proposed for protecting tall buildings against strong earthquakes are investigated and evaluated. The hybrid control system consists of a base isolation system connected to either a passive or active mass damper. The base isolation system, such as elastomeric bearings, is used to decouple the horizontal ground motions from the building, whereas the mass damper,

J. N. Yang; A. Danielians; S. C. Liu

1990-01-01

455

17 CFR 230.503 - Filing of notice of sales.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Filing of notice of sales. 230.503 Section 230.503 Commodity...D-Rules Governing the Limited Offer and Sale of Securities Without Registration Under...1933 § 230.503 Filing of notice of sales. (a) When notice of sales on...

2013-04-01

456

Near real time inverse source modeling and stress filed assessment: the requirement of a volcano fast response system  

Microsoft Academic Search

Volcanic unrest and eruptions are one of the major natural hazards next to earthquakes, floods, and storms. It has been shown that many of volcanic and tectonic unrests are triggered by changes in the stress field induced by nearby seismic and magmatic activities. In this study, as part of a mobile volcano fast response system so-called \\

Manoochehr Shirzaei; Thomas Walter

2010-01-01

457

Ground fault and overcurrent protection criteria for coal mine AC distribution systems. Open file report August 1979October 1980  

Microsoft Academic Search

Ground fault and overcurrent protection criteria for coal mine ac distribution systems were examined by authorization of the Bureau of Mines. The report begins with a literature review that discusses relaying topics including instrument transformers, ground fault pickup methods, static relaying, and comparison of relaying techniques. A chapter on ground fault relaying provides recommendations for maximum and minimum pickup levels

J. A. Kiefer; J. L. Kohler

1980-01-01

458

Single-file diffusion through inhomogeneous nanopores.  

PubMed

Strict one-dimensional diffusion, due to geometrical confinement in a nanopore, of an assembly of particles forbids overtaking by each other, giving rise to single-file diffusion (SFD). Smooth carbon nanotube is the epitome of SFD. However, natural nanoporous materials are far from smooth; morphologically, the nanopores' inner surface may provide an inhomogeneous environment for diffusion to occur, giving rise to subnormal diffusion even for an isolated particle diffusing through this fractal landscape. The realm of fractional diffusion (FD) falls under this paradigm. In order to understand the characteristics of SFD through inhomogeneous nanopores, here, we introduce a fractional SFD (FSFD) formalism that deals with a combination of these two phenomena, namely, SFD of particles, each of which are moving subdiffusively in one dimension. For an infinite system, we obtain the mean square displacement (MSD) of the combined entity and our analysis is based on FD equation for particles moving in concert where the single-file correlation is established through reflection principle. For a finite system, we calculate the transport probabilities based on continuous time random walk model. While both the diffusion mechanisms (SFD and FD) acting separately are responsible for slow dynamics at long times, their combined effect leads to ultraslow diffusion. For example, while the long time asymptote of MSD of SFD scales as sqr rt of t, that for FSFD is sqr rt of t(alpha), where alpha is the measure of the extent of inhomogeneity. These findings, which are believed to occur in a natural inhomogeneous nanopore, is also important for design and fabrication of nanofluidic devices through which the fluid delivery can be engineered. PMID:18361606

Bandyopadhyay, Tusar

2008-03-21

459

Usability of a Battle Management System Under Simulated Vehicular Motion.  

National Technical Information Service (NTIS)

Military personnel may be required to conduct command and control tasks whilst under various levels of motion. This study examined whether there were performance degradations for typical tasks that commanders may be expected to complete whilst on the move...

G. Judd O. Abedin V. Demczuk

2012-01-01

460

An interactive computer system for evaluating coal mine illumination. Open file report (final) Oct 77-Dec 79  

SciTech Connect

A computer system for calculating the illumination on coal mine surfaces due to machine-mounted lights is described. Utilizing numerical models of mining machinery and measured data on luminaire output characteristics, the program computes the foot-candle levels incident on the mine entry surfaces for any desired machine-luminaire-entry configuration. Shadowing effects of the machine are taken into account. Results are provided at 2-foot intervals on the face, left and right walls, floor, and roof. The system operates interactively from a Tektronix 4014 graphics terminal which handles all input-out functions. The software is installed on a Cyber 74 computer that communicates with the terminal by a telephone line.

Goldstein, R.

1980-03-01

461

Browse and discover: social file sharing in the enterprise  

Microsoft Academic Search

There is a growth in the popularity of social file sharing systems. This paper describes the design of Cattail, a social file sharing system for the enterprise. Through a 'Recent Events' stream, Cattail supports social navigation and exploratory search by inferring relevant social connections rather than purely relying on user-specified contacts. Social navigation is further supported through pivot browsing from

N. Sadat Shami; Michael J. Muller; David R. Millen

2011-01-01

462

77 FR 65678 - Combined Notice of Filings #1  

Federal Register 2010, 2011, 2012, 2013

...Independent Transmission System Operator, Inc. Description: SA 2236 CapX-Fargo T-T to be effective 10/23/2012. Filed Date: 10...Independent Transmission System Operator, Inc. Description: SA 2386 CapX Fargo Phase 3 to be effective 10/23/2012. Filed Date:...

2012-10-30

463

File Server Scaling with Network-Attached Secure Disks  

Microsoft Academic Search

By providing direct data transfer between storage and client, network-attached storage devices have the potential to improve scalability for existing distributed file systems (by removing the server as a bottleneck) and bandwidth for new parallel and distributed file systems (through network striping and more efficient data paths). Together, these advantages influence a large enough fraction of the storage market to

Garth A. Gibson; David F. Nagle; Khalil Amiri; Fay W. Chang; Eugene M. Feinberg; Howard Gobioff; Chen Lee; Berend Ozceri; Erik Riedel; David Rochberg; Jim Zelenka

1997-01-01

464

An interactive computer system for evaluating coal mine illumination. Open file report (final) Oct 77Dec 79  

Microsoft Academic Search

A computer system for calculating the illumination on coal mine surfaces due to machine-mounted lights is described. Utilizing numerical models of mining machinery and measured data on luminaire output characteristics, the program computes the foot-candle levels incident on the mine entry surfaces for any desired machine-luminaire-entry configuration. Shadowing effects of the machine are taken into account. Results are provided at

Goldstein

1980-01-01

465

Improved Read Performance in a Cost-Effective, Fault-Tolerant Parallel Virtual File System (CEFT-PVFS)  

Microsoft Academic Search

Due to the ever-widening performance gap between processors and disks, I\\/O operations tend to become the major performance bottleneck of data-intensive applications on modern clusters. If all the existing disks on the nodes of a cluster are connected together to establish high performance parallel storage systems, the cluster's overall performance can be boosted at no additional cost. CEFT-PVFS (a RAID

Yifeng Zhu; Hong Jiang; Xiao Qin; Dan Feng; David R. Swanson

2003-01-01

466

Spatial distributions of observables in systems under thermal gradients  

SciTech Connect

Departures of observables from their thermal equilibrium expectation values are studied under heat flow in steady-state nonequilibrium environments. The relation between the spatial and temperature dependence of these nonequilibrium behaviors and the underlying statistical properties are clarified from general considerations. The predictions are then confirmed in direct numerical simulations within the Fermi-Pasta-Ulam {beta} model. Nonequilibrium momentum distribution functions are also examined and characterized through their cumulants and the properties of higher order cumulants are discussed.

Aoki, Kenichiro [Department of Physics, Keio University, 4-1-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8521 (Japan); Kusnezov, Dimitri [Center for Theoretical Physics, Sloane Physics Lab, Yale University, New Haven, Connecticut 06520-8120 (United States)

2004-11-01

467

Electricity Database Files  

NSDL National Science Digital Library

The Electricity Database Files Web site from the Department of Energy's Energy Information Administration division contains several helpful resources. The site's two main categories are entitled Electric Generator Databases and Power Plant Databases, which contain more than a dozen links to related information. These include everything from an Annual Electric Generator Report, Electric Utilities Database, and a Wholesale Electric Trade Database, to a Clean Air Act Database Browser that provides information about electricity generators that must comply with the sulfur dioxide provisions of the Clean Air Act Amendments of 1990. This unique and informative collection, besides being easy to access, makes utilizing the information simple by allowing users to download the files as either Microsoft Access or Excel files.

468

Near real time inverse source modeling and stress filed assessment: the requirement of a volcano fast response system  

NASA Astrophysics Data System (ADS)

Volcanic unrest and eruptions are one of the major natural hazards next to earthquakes, floods, and storms. It has been shown that many of volcanic and tectonic unrests are triggered by changes in the stress field induced by nearby seismic and magmatic activities. In this study, as part of a mobile volcano fast response system so-called "Exupery" (www.exupery-vfrs.de) we present an arrangement for semi real time assessing the stress field excited by volcanic activity. This system includes; (1) an approach called "WabInSAR" dedicated for advanced processing of the satellite data and providing an accurate time series of the surface deformation [1, 2], (2) a time dependent inverse source modeling method to investigate the source of volcanic unrest using observed surface deformation data [3, 4], (3) the assessment of the changes in stress field induced by magmatic activity at the nearby volcanic and tectonic systems. This system is implemented in a recursive manner that allows handling large 3D data sets in an efficient and robust way which is requirement of an early warning system. We have applied and validated this arrangement on Mauna Loa volcano, Hawaii Island, to assess the influence of the time dependent activities of Mauna Loa on earthquake occurrence at the Kaoiki seismic zone. References [1] M. Shirzaei and T. R. Walter, "Wavelet based InSAR (WabInSAR): a new advanced time series approach for accurate spatiotemporal surface deformation monitoring," IEEE, pp. submitted, 2010. [2] M. Shirzaei and R. T. Walter, "Deformation interplay at Hawaii Island through InSAR time series and modeling," J. Geophys Res., vol. submited, 2009. [3] M. Shirzaei and T. R. Walter, "Randomly Iterated Search and Statistical Competency (RISC) as powerful inversion tools for deformation source modeling: application to volcano InSAR data," J. Geophys. Res., vol. 114, B10401, doi:10.1029/2008JB006071, 2009. [4] M. Shirzaei and T. R. Walter, "Genetic algorithm combined with Kalman filter as powerful tool for nonlinear time dependent inverse modelling: Application to volcanic deformation time series," J. Geophys. Res., pp. submitted, 2010.

Shirzaei, Manoochehr; Walter, Thomas

2010-05-01

469

Laissez-faire file sharing: access control designed for individuals at the endpoints  

Microsoft Academic Search

When organizations deploy file systems with access control mechanisms that prevent users from reliably sharing files with others, these users will inevitably find alternative means to share. Alas, these alternatives rarely provide the same level of confidentiality, integrity, or auditability provided by the prescribed file systems. Thus, the imposition of restrictive mechanisms and policies by system designers and administrators may

Maritza L. Johnson; Steven M. Bellovin; Robert W. Reeder; Stuart E. Schechter

2009-01-01

470

78 FR 55248 - Combined Notice of Filings  

Federal Register 2010, 2011, 2012, 2013

...Comments Due: 5 p.m. ET 9/11/13. Docket Numbers: RP13-1298-000. Applicants: Colorado Interstate Gas Company, L.L...s Annual Operational Purchases and Sales Report under RP13-1298. Filed Date: 8/30/13. Accession Number:...

2013-09-10

471

77 FR 32115 - Notice of Agreements Filed  

Federal Register 2010, 2011, 2012, 2013

...Charter, Sailing and Cooperative Working Agreement Western Mediterranean-U.S. East Coast. Parties: CMA CGM, S.A. and A...Moller-Maersk A/S trading under the name Maersk Line and Mediterranean Shipping Company S.A. Filing Party: Wayne R....

2012-05-31

472

ESUSA: U. S. endangered species distribution file  

Microsoft Academic Search

A file containing distribution data on federally listed or proposed endangered species of the United States is described. Included are (a) the common name, (b) the scientific name, (c) the taxonomic family, (d) the OES\\/FWS\\/USDI group (mammal, bird, etc.), (e) the status, (f) the geographic distribution by counties, and (g) Federal Register references. Status types are endangered, threatened, proposed, under

J. Nagy; C. E. Calef

1978-01-01

473

GUAM - FACILITIES REPORTING UNDER THE BIENNIAL REPORTING SYSTEM (BRS)  

EPA Science Inventory

Points represent facilities that report hazardous waste generation to the Biennial Reporting System (BRS). These facilities represent BRS reporters for the year 1999. BRS is a national system that collects data on the generation, management, and minimization of hazardous waste. ...

474

Earthworm populations under different tillage systems in organic farming  

Microsoft Academic Search

To understand how earthworms could improve soil porosity in no-tillage organic farming systems, the aim of our study was to compare the effect of different tillage systems on earthworm populations, from conventional (traditional mouldboard ploughing, MP and shallow mouldboard ploughing, SMP) to conservation tillage (reduced tillage, RT, direct drilling or very superficial tillage, NT) in three organic arable systems in

J. Peigné; M. Cannavaciuolo; Y. Gautronneau; A. Aveline; J. L. Giteau; D. Cluzeau

2009-01-01

475

The Taiwanese health care system under efficiency scrutiny  

Microsoft Academic Search

This thesis describes the status quo of the Taiwanese health care system in the year 2000, 5 years after the reforms, analyses the economic efficiency of single components of the new health care system and searches for possible solutions to solve uncovered problems. For a better understanding of the Taiwanese health care system, the economic, political and demographic environment is

Jonas Schreyögg

2004-01-01

476

Extreme value laws in dynamical systems under physical observables  

Microsoft Academic Search

Extreme value theory for chaotic dynamical systems is a rapidly expanding area of research. Given a system and a real function (observable) defined on its phase space, extreme value theory studies the limit probabilistic laws obeyed by large values attained by the observable along orbits of the system. Based on this theory, the so-called block maximum method is often used

Mark P. Holland; Renato Vitolo; Pau Rabassa; Alef E. Sterk; Henk W. Broer

2011-01-01

477

Extreme value laws in dynamical systems under physical observables  

Microsoft Academic Search

Extreme value theory for chaotic deterministic dynamical systems is a rapidly expanding area of research. Given a system and a real function (observable) defined on its phase space, extreme value theory studies the limit probabilistic laws obeyed by large values attained by the observable along orbits of the system. Based on this theory, the so-called block maximum method is often

Mark P. Holland; Renato Vitolo; Pau Rabassa; Alef E. Sterk; Henk W. Broer

2012-01-01

478

Flash Open File Format  

NSDL National Science Digital Library

Macromedia has released the file format specification for its Flash (discussed in the April 11, 1997 Scout Report) multimedia web tool. Flash allows web developers to create vector based graphics and animation. By making the format (.swf) available, Macromedia hopes to establish it as a standard for vector graphics and animation. The company claims it will "submit the format specification to a recognized Internet standards organization." In addition to providing the file format specification, the site provides Flash related news releases, a Flash FAQ, and a vector graphics white paper.

479

The Dung File  

NSDL National Science Digital Library

The Dung File is a collection of references relevant to the archaeological and paleoenvironmental analysis of coprolites and latrine fills, with a focus on North American research. Compiled by the University of Alberta's Alwynne B. Beaudoin, the Dung File includes ten sections: four to do with deposit origin; one devoted to theses; two on modern comparative studies; another listing articles from the popular press; and two broader categories including a section on procedural and analytical techniques. Each section contains a straightforward list of annotated references.

1998-01-01

480

Evaluation and comparison of linear and branching delivery systems. Open file report, 29 September 1978-7 August 1984  

SciTech Connect

A series of linear-programmed instruction modules was developed in the general subject areas of blasting technology and explosives safety and electrical training. The programs (modules) were developed in the form of tape and slide plus workbook materials, while the branching format evolved from the Lincoln terminal system from the Massachusetts Institute of Technology, through several other teaching machines and microcomputers, and finally settling on Radio Shack TRS-80 microcomputer models I and III. Initial validation figures indicate that essentially the same results are attained from both methods, with the most noticeable difference being an approximate 25% savings in study time with the branching modules.

Wichser, J.A.

1984-08-01

481

Information and Control in Gray-Box Systems  

Microsoft Academic Search

In modern systems, developers are often unable to modify the underlying operating system. To build services in such an environment, we advocate the use of one can impose on the OS. In this paper, we develop and investigate three gray-box Information and Control Layers (ICLs) for determining the contents of the file-cache, controlling the layout of files across local disk,

Andrea C. Arpaci-Dusseau; Remzi H. Arpaci-Dusseau

2001-01-01

482

32 CFR 701.128 - Exemptions for specific Navy record systems.  

Code of Federal Regulations, 2010 CFR

...Government under an express or implied promise of confidentiality. (m) System identifier and name: (1) N05520-4, NCIS Investigative Files System. (2) Exemptions: (i) Parts of this system may be exempt pursuant to 5 U.S.C....

2010-07-01

483

Development of a multiple unit continuous haulage system. Open file report 25 Jun 75-17 Oct 83  

SciTech Connect

The objective of this research was to design a method to continuously convey coal from the mining machine to the main haulage belt without requiring additional operators. The multiple-unit continuous haulage system consists of a multiplicity of rubber-tired vehicles on which chain conveyors are mounted. The vehicles are connected together into a train by unique mechanical connecting linkages that guide trailing vehicles in the path of the lead vehicle. The train consists of a staffed lead vehicle that follows the miner, a number of unstaffed vehicles that determine the length of the train, and a staffed discharge vehicle that delivers the coal via a bridge conveyor to a panel belt conveyor special design tailpiece.

Hundman, G.J.; Meisel, P.W.

1983-07-01

484

Optimal Expansion Strategy for a Sewer System under Uncertainty  

Microsoft Academic Search

Because of fast urban sprawl, land use competition, and the gap in available funds and needed funds, municipal decision makers\\u000a and planners are looking for more cost-effective and sustainable ways to improve their sewer infrastructure systems. The dominant\\u000a approaches have turned to planning the sanitary sewer systems within a regional context, while the decentralized and on-site\\/cluster\\u000a wastewater systems have not

Ni-Bin Chang; Elma Annette Hernandez

2008-01-01

485

Edge-cracked bimaterial systems under thermal heating  

Microsoft Academic Search

The problem of thermoelastic edge-cracking in two-layered bimaterial systems subjected to convective heating is considered. The medium is assumed to be insulated on one surface and exposed to sudden convective heating on another surface containing the edge crack. It is known that, when a bimaterial system’s surface is heated, compressive stresses arise near the heating surface, forcing the crack surfaces

Abd El-Fattah A. Rizk; Meftah Hrairi

2009-01-01

486

A statistically based system for prioritizing information exploration under uncertainty  

Microsoft Academic Search

This paper examines the problem of prioritizing actions under uncertainty. Our motivating applications come from the domain of data mining. Data mining problems present the user with a huge collection of individual items (e.g., abstracts, medical histories, and computer users' command histories) and require that these items be prioritized according to which should be pursued thoroughly. More precisely, each data

Paul Helman; Jessie Bhangoo

1997-01-01

487

Consensus seeking in multiagent systems under dynamically changing interaction topologies  

Microsoft Academic Search

This note considers the problem of information consensus among multiple agents in the presence of limited and unreliable information exchange with dynamically changing interaction topologies. Both discrete and continuous update schemes are proposed for information consensus. This note shows that information consensus under dynamically changing interaction topologies can be achieved asymptotically if the union of the directed interaction graphs have

Wei Ren; Randal W. Beard

2005-01-01

488

Illegal File Sharing 101  

ERIC Educational Resources Information Center

|Much of higher education's unease arises from the cost of dealing with illegal file sharing. Illinois State University, for example, calculated a cost of $76 to process a first claim of copyright infringement and $146 for a second. Responses range from simply passing along claims to elaborate programs architected with specific goals in mind.…

Wada, Kent

2008-01-01

489

The New Resource File  

ERIC Educational Resources Information Center

|The development of the resource file is a common experience in teacher preparation programs. The author examines strategies for transforming what has been a project composed of physical resources to one emphasizing digital resources. Methods for finding, tagging, storing and retrieving resources are explored.|

Luck, Donald D.

2011-01-01

490

OECD Focus Hot File  

NSDL National Science Digital Library

In each issue of the Organization for Economic Co-operation and Development (OECD)'s Focus Hot File, recent books and government reports of interest are listed with summaries and contact information. Past listings may be browsed by country in the Focus Compendium, and related publications are hyperlinked throughout.

491

Performance Evaluation of Surveillance Systems Under Varying Conditions  

Microsoft Academic Search

Effectively evaluating the performance of moving object detection and tracking algorithms is an important step towards attaining robust digital video surveillance systems with sufficient accuracy for practical applications. As systems become more complex and achieve greater robustness, the ability to quantitatively assess performance is needed in order to continuously improve performance. In this paper, we refine the methods used to

Lisa M. Brown; Andrew W. Senior; Ying-li Tian; Jonathan Connell; Arun Hampapur; Chiao-Fe Shu; Hans Merkl; Max Lu

492

The filtered venting system under construction at barseback  

Microsoft Academic Search

A filter venting containment system, bearing the acronym FILTRA will be installed at the Swedish nuclear power plant Barseback. The Barseback Power Plant is owned by the Southern Sweden Power Supply (Sydkraft AB) and has two 1700-MW boiling water reactors. The reactors are of ASEA-ATOM design with pressure suppression containments (Mark IItype). The installation of the filter venting system is

1985-01-01

493

Evolving Efficient Security Systems Under Budget Constraints Using Genetic Algorithms  

Microsoft Academic Search

The EASI model (estimate of adversary sequence interruption model) is a dynamic, analytic method widely used by security professionals to evaluate a physical protection security system (ppss). Our methods involve using genetic algorithms to evolve such systems when budget constraints or detector sequencing must be considered.

Michael L. Gargano; William Edelson; Paul Benjamin; Paul Meisinger; Maheswara Kasinadhuni; Joseph DeCicco

2003-01-01

494

Preferred States of Decoherence under Intermediate System-Environment Coupling  

NASA Astrophysics Data System (ADS)

The notion that decoherence rapidly reduces a superposition state to an incoherent mixture implicitly adopts a special representation, namely, the representation of preferred (pointer) states (PS). For weak or strong system-envrionment interaction, the behavior of PS is well known. Via a simple dynamical model that simulates a two-level system interacting with few other degrees of freedom as its environment, it is shown that even for intermediate system-environment coupling, approximate PS may still emerge from the coherent quantum dynamics of the whole system in the absence of any thermal averaging. The found PS can also continuously deform to expected limits for weak or strong system-environment coupling. Computational results are also qualitatively explained. The findings should be useful towards further understanding of decoherence and quantum thermalization processes.

Wang, Wen-Ge; He, Lewei; Gong, Jiangbin

2012-02-01

495

Recent physician strike in Israel: a health system under stress?  

PubMed Central

In 2011, a series of physician strikes in Israel followed eight months of unsuccessful negotiations with the government (Ministry of Health and the Ministry of Finance). Strikes by physicians may be a warning that all is not well in a health system and protestors have claimed that they signify a system failure. In contrast, others argue that strikes have been a feature of the Israeli health system from its inception and should not be a cause for alarm. This paper analyses the Israeli health system from the perspective of the strikers' demands using the World Health Organisation’s six health system building blocks as a framework, including: service delivery; health workforce; information; medical products, vaccines and technologies; leadership and governance; and financing. While we recognise that the immediate causes of the 2011 strikes were concerns about salaries and working conditions, we argue that a complex set of interacting factors underlie the strikers' demands, resonating with issues relating to five of the WHO building blocks. We argue that of the five, three are most significant and limit progress with all the others: a disgruntled health workforce, many of whom believe that striking is the only way to be heard; a lack of leadership by the government in understanding and responding to physicians' concerns; and a purported information insufficiency, manifest as a lack of critique and analysis that may have prevented those at the top from making a reliable diagnosis of the system’s problems. This paper argues that there are cracks within the Israeli health system but that these are not irresolvable. The Israeli health system is a relatively new and popular health system, but there are no grounds for complacency.

2013-01-01

496

Health Topic XML File Description  

MedlinePLUS

... Supplements Videos & Cool Tools MedlinePlus Health Topic XML File Description To use the sharing features on this ... Tags - definitions of every possible tag in the file, with examples and their use on MedlinePlus. Example ...

497

The filtered venting system under construction at barseback  

SciTech Connect

A filter venting containment system, bearing the acronym FILTRA will be installed at the Swedish nuclear power plant Barseback. The Barseback Power Plant is owned by the Southern Sweden Power Supply (Sydkraft AB) and has two 1700-MW boiling water reactors. The reactors are of ASEA-ATOM design with pressure suppression containments (Mark IItype). The installation of the filter venting system is a condition set by the Swedish government for a continued operating license after September 1, 1986. The construction work for the FILTRA plant, the first of its kind ever planned, will be completed at the end of 1985. The FILTRA is designed so that 99.9% of the core inventory of radioactivity, excluding inert gases, is retained in the reactor containment and filter system in the event of containment venting. Another design guideline is to achieve passive functioning of the FILTRA plant during the first 24 h of an accident. The FILTRA plant is common to the two reactors on the site and consists mainly of two systems, a venting system (pressure relief system) and a filtering system. The total cost is approximately U.S. $15 million.

Persson, A.H.

1985-08-01

498

46 CFR 67.219 - Optional filing of instruments by facsimile.  

Code of Federal Regulations, 2011 CFR

...MEASUREMENT OF VESSELS DOCUMENTATION OF VESSELS Filing and Recording of Instruments-General Provisions § 67.219 Optional...a) Any instrument identified as eligible for filing and recording under § 67.200 may be submitted for filing to...

2011-10-01

499

46 CFR 67.219 - Optional filing of instruments by facsimile.  

Code of Federal Regulations, 2012 CFR

...MEASUREMENT OF VESSELS DOCUMENTATION OF VESSELS Filing and Recording of Instruments-General Provisions § 67.219 Optional...a) Any instrument identified as eligible for filing and recording under § 67.200 may be submitted for filing to...

2012-10-01

500

12 CFR 1102.23 - Formal requirements as to papers filed.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Formal requirements as to papers filed. 1102.23 Section 1102.23 Banks...Proceedings § 1102.23 Formal requirements as to papers filed. (a) Form. All papers filed under this subpart must be...

2013-01-01