Science network resources: Distributed systems

The Master Directory, which is overview information about whole data sets, is outlined. The data system environment is depicted. The question is explored of what is a prototype international directory including purpose and features. Advantages of on-line directories are listed. Interconnected directory assumptions are given. A description of given of DIF (Directory Interchange Format), which is an exchange file for directory information, along with information content of DIF and directories. The directory population status is given in a percentage viewgraph. The present and future directory interconnections status at GSFC is also listed

Definition and testing of the hydrologic component of the pilot land data system

The specific aim was to develop within the Pilot Land Data System (PLDS) software design environment, an easily implementable and user friendly geometric correction procedure to readily enable the georeferencing of imagery data from the Advanced Very High Resolution Radiometer (AVHRR) onboard the NOAA series spacecraft. A software subsystem was developed within the guidelines set by the PLDS development environment utilizing NASA Goddard Space Flight Center (GSFC) Image Analysis Facility's (IAF's) Land Analysis Software (LAS) coding standards. The IAS current program development environment, the Transportable Applications Executive (TAE), operates under a VAX VMS operating system and was used as the user interface. A brief overview of the ICARUS algorithm that was implemented in the set of functions developed, is provided. The functional specifications decription is provided, and a list of the individual programs and directory names containing the source and executables installed in the IAF system are listed. A user guide is provided for the LAS system documentation format for the three functions developed

SQUASH FILESYSTEM COMPRESSION USING LEMPEL ZIV MARKOV CHAIN ALGORITHM (LZMA)

ABSTRAKSI: LZMA adalah salah satu algoritma kompresi terbaik dan squashfs adalah salah satu filesystem terkompresi yang terbaik saat ini. LZMA dapat mengkompres jauh lebih baik daripada gzip, yang digunakan dalam squashfs sekarang. Kompresi ke format LZMA sangat lambat, tetapi hal ini tidak masalah karena filesystem squashfs perlu dikompresi hanya sekali, kemudian dapat dibaca berkali-kali. Penelitian ini menggabungkan karakteristik Squasfs dan LZMA untuk meningkatkan squashfs pada sistem linux live dengan kompresi berdasarkan direktori.Dalam penelitian ini squashfs-LZMA ditingkatkan dengan lima direktori kompresi berdasarkan prioritas. Kelima layout direktori tersebut dipilih sesuai dengan masalah dependensi. Hasil penelitian ini menunjukkan rasio kompresi yang lebih besar waktu yang dibutuhkan, dan penggunaan memori. Variabel-variabel tersebut diuji dengan menggunakan beberapa alat yang tersedia dalam distribusi linux, yaitu free dan vmstat. Vmstat disisipkan kedalam initial ramdisk (initrd) untuk mengumpulkan statistik memori virtual saat proses booting.Kata Kunci : Sistem Operasi, Linux, SquashFS, Kompresi LZMA.ABSTRACT: LZMA is one of the best compression algorithms and Squashfs is one of the best compressed filesystems available nowadays. LZMA can compress much better than gzip, which is used in squashfs now. Compressing to LZMA format is very slow, but this is not a problem as the squashfs filesystem needs to be compressed only once, then it can be read many times. This study combined the characteristic of Squasfs and LZMA Compression to improve Squashfs for live linux system with directory priority compression.In this study squashfs-lzma was improved with five directory priority compression. These five directory layouts was selected based on the dependencies among files. The result of this study obtained better compression ratios, time taken, and the memory usage. Those variables were tested using tools available in linux distribution called free and vmstat. Vmstat was inserted to the initial ramdisk (initrd) to collect the virtual memory statistic when booting process.Keyword: Operating System, Linux, SquashFS, LZMA Compression

Justice Data Base Directory

The Justice Data Base Directory was originally published in 1988 with an introduction, 8 chapters describing Alaska justice agencies and their data holdings, and an index. It was published in looseleaf notebook format for easy updating. Four updates were published in 1989–1992, each update consisting of additional chapters, revised table of contents and index, and updates to existing pages to reflect changes such as agency addresses. Five chapters were added in 1989; five in 1990; four in 1991; and five in 1992, for a total of 27 agencies covered by the Justice Data Base Directory in its final form. For archival purposes, this record includes all five versions of the directory. The 1992 edition is the most complete.The Justice Data Base Directory, first published in 1988 with new chapters added annually through 1992, presents information about the primary databases maintained by Alaska justice agencies and the procedures to be followed for access to the data. Its availability should substantially reduce the work required to identify the sources of data for research and policy development in law, law enforcement, courts, and corrections. The 1992 update to the directory adds five chapters, for a total of 27 Alaska agencies whose justice-related data holdings are described: Alaska Court System; Alaska Judicial Council; Alaska Commission on Judicial Conduct; Alaska Department of Law; Alaska Department of Public Safety (DPS) and three agencies under DPS: Alaska Police Standards Council, Council on Domestic Violence and Sexual Assault (CDSA), and Violent Crimes Compensation Board; Alaska Department of Corrections (DOC) and Parole Board; four agencies of the Alaska Department of Health and Social Services — Bureau of Vital Statistics (Division of Public Health), Epidemiology Section (Division of Public Health), Division of Family and Youth Services, and Office of Alcoholism and Drug Abuse; Alaska Public Defender Agency; Office of Public Advocacy (OPA); Alaska Bar Association; Alaska Justice Statistical Analysis Unit; Alaska Office of Equal Employment Opportunity (Office of the Governor); Alaska Office of the Ombudsman; Alaska Legal Services Corporation; Alaska Public Offices Commission; Alaska State Commission for Human Rights; Alcoholic Beverage Control (ABC) Board; Legislative Research Agency; Legislative Affairs Agency; State Archives and Records Management Services (Alaska Department of Education). Fully indexed.Funded in part by a grant from the Bureau of Justice Statistics.1. Introduction / 2. Alaska Court System / 3. Alaska Department of Law / 4. Alaska Department of Public Safety / 5. Alaska Department of Corrections / 6. Division of Family and Youth Services, Alaska Department of Health and Social Services / 7. Alaska Bar Association / 8. Alaska Judicial Council / 9. Alaska Justice Statistical Analysis Unit / 10. Bureau of Vital Statistics, Division of Public Health, Alaska Department of Health and Social Services / 11. Alaska Office of Equal Employment Opportunity, Office of the Governor / 12. Office of Alcoholism and Drug Abuse, Alaska Department of Health and Social Services / 13. Council on Domestic Violence and Sexual Assault, Alaska Department of Public Safety / 14. Epidemiology Section, Division of Public Health, Alaska Department of Health and Social Services / 15. Violent Crimes Compensation Board, Alaska Department of Public Safety / 16. Alaska Police Standards Council, Alaska Department of Public Safety / 17. Alcoholic Beverage Control Board / 18. Alaska Office of the Ombudsman / 19. State Archives and Records Management Services, Alaska Department of Education / 20. Legislative Research Agency / 21. Legislative Affairs Agency / 22. Alaska State Commission for Human Rights / 23. Parole Board, Alaska Department of Corrections / 24. Alaska Public Offices Commission / 25. Alaska Commission on Judicial Conduct / 26. Alaska Legal Services Corporation / 27. Office of Public Advocacy / 28. Alaska Public Defender Agency / 29. Inde

Event Indexing Systems for Efficient Selection and Analysis of HERA Data

The design and implementation of two software systems introduced to improve the efficiency of offline analysis of event data taken with the ZEUS Detector at the HERA electron-proton collider at DESY are presented. Two different approaches were made, one using a set of event directories and the other using a tag database based on a commercial object-oriented database management system. These are described and compared. Both systems provide quick direct access to individual collision events in a sequential data store of several terabytes, and they both considerably improve the event analysis efficiency. In particular the tag database provides a very flexible selection mechanism and can dramatically reduce the computing time needed to extract small subsamples from the total event sample. Gains as large as a factor 20 have been obtained.Comment: Accepted for publication in Computer Physics Communication

JaxoDraw: A graphical user interface for drawing Feynman diagrams

JaxoDraw is a Feynman graph plotting tool written in Java. It has a complete graphical user interface that allows all actions to be carried out via mouse click-and-drag operations in a WYSIWYG fashion. Graphs may be exported to postscript/EPS format and can be saved in XML files to be used in later sessions. One of the main features of JaxoDraw is the possibility to produce LaTeX code that may be used to generate graphics output, thus combining the powers of TeX/LaTeX with those of a modern day drawing program. With JaxoDraw it becomes possible to draw even complicated Feynman diagrams with just a few mouse clicks, without the knowledge of any programming language.Comment: 15 pages, no figures; typos corrected; visit the JaxoDraw home page at http://altair.ific.uv.es/~JaxoDraw/home.htm

UNICORE COMMANDLINE CLIENT: USER MANUAL

The UNICORE Commandline client (UCC) is a full-featured client for the UNICORE Grid middlewar