storage and file structure ppt

... on Files Unordered Files Ordered Files Hashed Files   Dynamic and Extendible Hashing Techniques RAID Technology Disk Storage Devices     Preferred secondary storage device for high storage ... Chapter Disk Storage, Basic File Structures, and Hashing Adapted from the slides of “Fundamentals of Database Systems” (Elmasri et al., 2003) Chapter Outline       Disk Storage Devices Files of ... blocks and hence span a number of blocks Files of Records     A file is a sequence of records, where each record is a collection of data values (or data items) A file descriptor (or file header)

Ngày tải lên: 03/11/2017, 16:54

... those between aH i and NH i+6 (i ¼ 1, 3, and 5 for chain A, and 1, 3, 5, 7, and 9 for chain B); and those between aH i and NH i-6 (i ¼ 10 and 8 for chain A, and 14, 12, 10, and 8 for chain B). ... left-handed double- helix structure transformed into two single-stranded right-handed b-helices with 6.3 residues per turn. Whereas the left-handed double b-helix is consistent with the structure ... [36]. A combi- nation of DQF-COSY and NOESY produced sequen- tial assignments (i.e. all aH and NH and their sequence in the backbone), and a combination of DQF-COSY and TOCSY resulted in assignments

Ngày tải lên: 30/03/2014, 15:20

... Content  2.1 Disk Storage  2.2 File Operations  2.3 Unordered Files  2.4 Ordered Files  2.5 Hash Files  2.6 Other File Structures  2.7 Today’s Storage Technologies  2.8 Physical Storage in Today’s ... Chapter Disk Storage and Basic File Structures  Chapter Indexing Structures for Files  Chapter Query Processing and Optimization  Chapter Introduction to Transaction Processing Concepts and Theory ... Unordered (heap) files  Ordered (sequential) files  Hashed files 113 Summary Static files vs Dynamic files  File operations  File organization vs Access method  Each primary file organization

Ngày tải lên: 06/04/2023, 09:30

... Shipbuilding and Force Structure Analysis Tool: A User’s Guide C.12. Material and Equipment Subform 91 C.13. Operations and Support Costs Subform 93 C.14. Labor Subform 94 C.15. Funding Profile Subform ... means (including photocopying, recording, or information storage and retrieval) without permission in writing from RAND. Published 2004 by RAND 1700 Main Street, P.O. Box 2138, Santa Monica, CA ... 15213-1516 RAND URL: http://www.rand.org/ To order RAND documents or to obtain additional information, contact Distribution Services: Telephone: (310) 451-7002; Fax: (310) 451-6915; Email: order@rand.org Library

Ngày tải lên: 23/03/2014, 01:20

... graphics and rendering were made with the aid of vmd v 1.8 [62] The best 20 structures, selected on the basis of lowest total energy, NMR R-factors and Ramachandran Inhibitory properties and NMR structure ... S7 Ramachandran plot and statistics of the 20 deposited structures Fig S8 Ensemble Ramachandran Plot for the 20 deposited structures Table S1 Experimental vicinal coupling constants and calculated ... The tertiary structure is stabilized by ion pairs and hydrogen bonds involving the side chain and backbone of Asp10-Asp26-Arg28 and Asp36-Asp52 residues At physiological pH, the final structure results

Ngày tải lên: 23/03/2014, 10:21

... dimensional structure of human DPP-IV in complex with various inhibitors Abstracts creates a better understanding of the specificity and selectivity of this enzyme and allows for further exploration and ... alignments at clan, family and peptidase levels showing peptidase units, active site residues and other structural features, and evolutionary trees for each family and peptidase There are comprehensive ... AD, its structure and physiological functions are topics of intense research interest currently Here we discuss the structural features of memapsin and how they contribute to the activity and inhibition

Ngày tải lên: 23/03/2014, 15:20

... for topic modelling, and PCFGs, which are a standard model of hierarchi- cal structure in language. The embedding we pre- sented shows how to express an LDA model as a PCFG, and has the property ... NP coreference models and other applica- tions. The rest of this paper is structured as follows. The next section reviews Latent Dirichlet Alloca- tion (LDA) topic models, and the following sec- tion ... topic z for the word according to θ j , and then drawing a word from φ z . Dirichlet priors with parameters β and α respectively are placed on the φ i and the θ j in order to avoid the zeros that

Ngày tải lên: 23/03/2014, 16:20

... soils with sand content above and below 80% Field observations showed that the site preparation and the 282 S.C González-Martínez and F Bravo Table III Main characteristics and population structure ... method Dummy variable for sand content between 65% and 80% Sand content of the soil following a field categorical method Dummy variable for sand content between 40% and 65% Thickness of the humus ... There was a large difference between minimum and maximum individual tree age in each stand, with an uppermost range of 19 years (Stand 8) and 20 years (Stand 7) Although the upper stratum generally

Ngày tải lên: 08/08/2014, 14:21

... https://fb.com/tailieudientucntt Chapter Outline       Disk Storage Devices Files of Records Operations on Files Unordered Files Ordered Files Hashed Files   Dynamic and Extendible Hashing Techniques RAID Technology ... depend on the current record of a file? Discuss the advantages and disadvantages of (a) unordered file, (b) ordered file, and (c) static hash file with buckets and chaining Which operations can ... difference between a file organization and an access method? What is the difference between static and dynamic files? What are the typical record-at-a-time operations for accessing a file? Which of

Ngày tải lên: 29/01/2020, 14:40

... three files called main.c, getline.c, and strindex.c. Then the command cc main.c getline.c strindex.c compiles the three files, placing the resulting object code in files main.o, getline.o, and ... operator and operand as it appears: while (next operator or operand is not end-of -file indicator) if (number) push it else if (operator) pop operands do operation push result else if (newline) pop and ... defined in one file, and the variables val and sp defined and initialized in another Then these definitions and declarations would be necessary to tie them together: in file1 : extern int

Ngày tải lên: 30/09/2013, 06:20

... /usr/dict/words file Displaying a Specific Number of Lines at the Beginning of a Files $ head -6 file1 file2 file3 ==> file1 file2 file2 file or command >> file command < file command 2> file Angle ... Command to join two files into one $ cat filename1 filename2 > file3 This example joins filename1 and filename2 files into filename3 file Note – If filename3 is existed, this command will overwrite ... and cmp Create empty files or update access time of existing files using the touch command Create and remove directories using mkdir and rmdir Manage files and directories using the mv, cp, and

Ngày tải lên: 02/10/2013, 09:20

... "Introduction to file handling". FCB Method 0FH Open file 14H Sequential reading 15H Sequential writing 16H Create file 21H Random reading 22H Random writing Handles 3CH Create file 3DH Open file 3EH ... block and register are dated 5.6.6 Random reading and writing The 21H function and the 22H function of the 21H interruption are the ones in charge of realizing the random readings and writings ... code: 06H if the handle is invalid This function dates the file and frees the handle it was using 3FH FUNCTION Use: To read a specific quantity of bytes from an open file and store them

Ngày tải lên: 06/10/2013, 20:20

... approach your article, and later it will help you choose vocabulary, examples, and analogies. Writing and Structure 73 In general, the readers of serious nonfiction are intelligent and curious, but ... Started and the Structure I do not always love to write. I love having written. —Anonymous place. If you think while you write, you will enjoy it more and your prose will be more muscular and engaging. ... Whisper The Mummy’s Tale Writing and Structure 75 Acupuncture in ancient Europe? Neanderthal civilization? Ask a mummy. [EUREKA!?] Acupuncture in ancient Europe? Neanderthal civilization? ASK A

Ngày tải lên: 25/10/2013, 07:20

... CCM technologies and determine their suitability to operating system installation and upgrade Students determine the hardware and software requirements and consider the benefits and shortcomings ... knowledge of unattended and scripted installations
Basic experience or knowledge of RIS and SMS
The knowledge and skills necessary to define and implement an installation and upgrade plan The ... Windows® 2000 or Microsoft Windows XP Help files, and the Windows 2000 or Windows XP Resource Kit
Be familiar with the principles and practice of Change and Configuration Management (CCM)
Read

Ngày tải lên: 10/12/2013, 15:15

... implemented and managed
Determining Software Distribution and Management Needs In this section, students learn how to identify the limitations and disadvantages of current technologies, and how ... instructions and to the details of the scenario
Divide the class into groups of two or more students
Present the lab and make sure that students understand the instructions and the purpose ... of the scenarios and highlight any key information
Remind students to consider the relative merits of SMS and IntelliMirror regarding software distribution and management, and to think about

Ngày tải lên: 10/12/2013, 15:15

... between EDI and other schemas, be sure that students understand that Extensible Markup Language Common Business Library (xCBL) is based on the structure of the American National Standards Institute ... search, such as Universal Standard Products and Services Classification (UNSPSC) codes ! Design an appropriate catalog structure Consider the size, catalog schema, and usability needs of your ... creation and management " Flexible catalog creation and management... technology industry uses RosettaNet, and the health care industry requires the Health Insurance Portability and Accountability

Ngày tải lên: 10/12/2013, 16:15

... Modules Each standard module contains three front panel jacks for easy passive and/ or intrusive access to the circuit and two rear connectors for attachment to data terminating and/ or communication ... provided to perform various other functions and special interfacing as might be required by the user Patch cords are available in standard and reverse key types and in a wide variety of lengths w w ... 12/02 • 517 Data Management and Access Products Table of Contents w w w a d c c o m • + - - - 8 • - 0 - 6 - Data Management and Access Products 12/02 • 517 Data Management and Access Products Introduction

Ngày tải lên: 10/12/2013, 17:15

... replace 1 and 2 by any two numbers l and m with l = m? 1.8 Exercise Write down an interval I with 2 ∈ I such that 1 ∈ I and 3 ∈ I Can you find the largest... Exercise Given that an → l and bn ... since cn → l as... either x − 2 > 0 and x + 3 > 0, in which case both x > 2 and x > −3, so x > 2; or x − 2 < 0 and x + 3 < 0, in which case both x < 2 and x < −3, so x < −3 Thus {x : (x ... 1.12 we have |x| = |x − y + y| ≤ |x − y| + |y| and so |x| − |y| ≤ |x − y| Interchanging the rˆles of x and. .. THEOREM AND OTHER ALGEBRA 9 and in general, we have an − bn = (a − b)(an−1

Ngày tải lên: 12/12/2013, 04:15

... về tần xuất vấn tin và sửa đổi. FILE CHỈ MỤC B + -CÂY (B + -Tree Index file) Tổ chức file chỉ mục tuần tự có một nhược điếm chính là làm giảm hiệu năng khi file lớn lên. Để khắc phục nhược ... TẬP TIN trang 57 HỆ QUẢN TRỊ CƠ SỞ DỮ LIỆU CHƯƠNG III LƯU TRỮ VÀ CẤU TRÚC TẬP TIN (Storage and File Structure) MỤC ĐÍCH Chương này trình bày các vấn đề liên quan đến vấn đề lưu trữ ... Round Hill A-301 550 • file tuần tự các mẩu tin account Trong phần này, ta giả thiết rằng tất cả các file được sắp thứ tự tuần tự trên một khoá tìm kiếm nào đó. Các file như vậy, với một chỉ...

Ngày tải lên: 15/09/2012, 09:38

... cell populations grown in RPMI and treated with two CPP concentrations (50 and 100 lmolÆL )1 ) and at two different extracellular Ca 2+ concentrations, 2 mmolÆL )1 (A) and 4 mmolÆL )1 (B). HT-29 ... loop and a b-turn, and the ‘cluster sequence’. However, and notably, the ‘cluster sequence’ alone does not exhibit the Ca 2+ uptake effect, suggest- ing that a particular supramolecular structure ... galactose- containing medium, and their differentiation was assessed by determining specific biochemical markers [alkaline phosphatase (ALP) and sucrase-isomaltase] and the rate of proliferation, and by electron-micro- scopic...

Ngày tải lên: 16/03/2014, 05:20