Este documento contiene 21 consejos de vida sobre temas como las relaciones, la comunicación y los arrepentimientos. También incluye instrucciones de reenviar el mensaje a otros para recibir buena suerte y mejoras en la vida, dependiendo de la cantidad de personas a quienes se les comparta.
The document outlines various security concepts including attacks, services, mechanisms, and methods of defense for network security. It discusses security attacks like interruption, interception, modification, and fabrication. It also covers security services like confidentiality, authentication, integrity, non-repudiation, and availability. Finally, it mentions methods of defense such as encryption, software and hardware controls, policies, and physical controls.
21. Application Development and Administration in DBMSkoolkampus
The document provides an overview of web interfaces to databases and techniques for improving web application performance. It discusses how databases can be interfaced with the web to allow users to access data from anywhere. It then covers topics like dynamic page generation, sessions, cookies, servlets, server-side scripting, and techniques for improving web server performance like caching. The document also discusses performance tuning at the hardware, database, and transaction levels to identify and address bottlenecks.
23. Advanced Datatypes and New Application in DBMSkoolkampus
This document discusses advanced data types and new applications in databases, including temporal data, spatial and geographic data, and multimedia data. It covers topics such as representing time in databases, temporal query languages, representing geometric information and spatial queries, indexing spatial data using structures like k-d trees and quadtrees, and applications of geographic data like in vehicle navigation systems.
The document provides an overview of Query-by-Example (QBE) and Datalog, two relational query languages. QBE allows graphical queries to be expressed "by example" using relation templates. It supports queries on single and multiple relations, negation, conditions, ordering results, and aggregate functions. Datalog is a logic-based query language based on rules that define views. It allows recursion and negation. Key features include safety and the power of recursive queries.
The document provides an introduction to XML, including that it is defined by the W3C as a markup language for documents and data interchange. XML allows users to define their own tags and has become widely used for data exchange between organizations. Key aspects of XML covered include elements, attributes, nesting of elements to represent relationships between data, and using Document Type Definitions (DTDs) or XML Schema to constrain the structure and relationships of XML documents.
This document discusses conventional encryption principles and algorithms. It covers the following key points:
1) Conventional encryption uses an encryption algorithm, secret key, and decryption algorithm to encrypt plaintext into ciphertext and decrypt ciphertext back to plaintext. The security depends on keeping the key secret, not the algorithm.
2) Common symmetric encryption algorithms discussed include DES, Triple DES, Blowfish, RC5, and CAST-128. Key sizes and number of rounds are important parameters for security.
3) Modes of operation like cipher block chaining are used to encrypt blocks of plaintext. Encryption can be done at the link level, end-to-end, or both for added security.
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24. Advanced Transaction Processing in DBMSkoolkampus
This document discusses various topics related to advanced transaction processing including:
1) Transaction processing monitors provide infrastructure for building transaction processing systems with multiple clients and servers.
2) Main memory databases store data in memory to improve performance by reducing disk access bottlenecks.
3) Workflow systems coordinate the execution of multiple interdependent tasks across different systems while ensuring consistency.
4) Long duration transactions require alternatives to traditional concurrency control and recovery techniques due to their interactive nature.
This document provides an overview of network management security using SNMP (Simple Network Management Protocol). It discusses the basic concepts of SNMP, including SNMP versions 1, 2, and 3. SNMPv3 adds security features like authentication, access control, and encryption that were missing from earlier versions. The document also recommends some references for further reading on SNMP and network management security.
Programme de gestion des connaissances du Service canadien des forêtsAlbert Simard
Proposition de programme de gestion des connaissances du SCF : gestion du changement, gestion des connaissances, analyse de rentabilisation, stratégie de mise en œuvre (2002); documents sur le programme disponibles
The document discusses distributed database systems, including homogeneous and heterogeneous distributed databases, distributed data storage using replication and fragmentation, distributed transactions, commit protocols like two-phase commit, and handling failures in distributed systems. Key topics covered are replication allowing high availability but increasing complexity, fragmentation allowing parallelism but requiring joins, and two-phase commit coordinating atomic commits across multiple sites through a prepare and commit phase.
The document summarizes web security considerations and technologies like SSL, TLS, and SET.
SSL and TLS provide encryption and authentication to secure data transmission between a client and server on the web. The handshake protocol allows servers and clients to authenticate each other and negotiate encryption before transmitting application data.
SET is an open encryption specification that protects credit card transactions on the internet. It provides security protocols and formats to ensure confidentiality, integrity of data, cardholder authentication, and merchant authentication for online payments. The sequence of events for transactions using SET is described briefly.
Authentication Application in Network Security NS4koolkampus
The document summarizes authentication methods including Kerberos and X.509. It outlines security concerns around confidentiality and timeliness. It provides an overview of how Kerberos works, including the authentication dialogue process. It also describes X.509 certificates and certification authorities. Recommended reading and websites on authentication topics are listed.
Modernizzare i data Center con le soluzioni Fibre Channel Gen 6 di BrocadeAntonio Palumbo
Lo scopo di questo documento è esporre le principali
tendenze e i progressi tecnologici compiuti illustrando come le tecnologie
Brocade® Fibre Channel Gen 6 e Brocade Fabric Vision™ con IO Insight
sono in grado di fornire prestazioni alle applicazioni, stabilità operativa,
flessibilità aziendale necessarie per ammodernare la rete e soddisfare le
esigenze attuali e future di archiviazione basata su flash
Relazione sul progetto di realizzazione di un algoritmo di localizzazione (mediante trilaterazione) attraverso l'utilizzo del controllore cRIO e del software LabVIEW.
Relazione sul progetto di realizzazione di un algoritmo di localizzazione (mediante trilaterazione) attraverso l'utilizzo del controllore cRIO e del software LabVIEW.
Codemotion 2013: Succo di lampone: come ottimizzare JAVA e PHP su un’architet...Matteo Baccan
Vedremo all’opera un’architettura basata su un cluster Raspberry Pi, con tutti gli hack necessari per poter utilizzare e ottimizzare applicazioni preesistenti basate su JAVA e PHP.
Verranno illustrati tutti quei piccoli accorgimenti che ci permettono di sfruttare al meglio le risorse limitate di questa architettura, in modo da capire cosa è possibile fare e cosa non è consigliabile fare.
Hypervisor e VM, clustering e HA, SAN e storage, architetture degli elaboratori - Terza lezione corso CESVIP "Tecnico di rete informatico specializzato in sicurezza delle reti"
Slides used for my Bachelor Degree presentation: the main focus is on SARP, a semi-active replication protocol that I developed and tested for my thsis work.
ArduinoDay17 - Creazione di un piccolo supercomputer con Raspberry PI per cal...Marco Cavallini
Nella presentazione verranno descritti brevemente ed in modo fruibile anche da persone non
tecnicamente preparate i concetti di base che descrivono una scheda Raspberry PI, il sistema
operativo Linux, il concetto di cluster di computer e la libreria MPI per effettuare del calcolo
parallelo.
Sulle schede sarà installato Raspbian Linux e verrà descritta l’implementazione del collegamento
dati (con tecnologia NFS) tra le schede e l’utilizzo della libreria MPIch per effettuare del calcolo
parallelo.
Il tutto accompagnato da una dimostrazione pratica del sistema hardware realizzato per la creazione
di un piccolo supercomputer basato su un cluster di quattro schede Raspberry PI 3.
Cosa è Raspberry
Cosa è Linux
Cosa è un cluster
Cosa è MPI
1. The document discusses Diopsis940, a microcontroller product from Atmel that features an ARM9 processor and floating point DSP for consumer applications.
2. It provides details on target applications including hands-free phones, high-end car audio, and sound processors. The microcontroller supports complex audio processing algorithms.
3. hArtes, an Atmel division, aims to reduce application development time through tools that streamline the process from conceptual design to implementation using their microcontroller products.
The document proposes a coarse-grain reconfigurable array (CGRA) for accelerating digital signal processing. The CGRA aims to provide an intermediate tradeoff between flexibility and performance compared to FPGAs and ASICs. It consists of an array of processing elements and distributed memory interconnected via programmable switches. Evaluation shows the CGRA achieves 4.8-8X speedup, 24-58% improved energy efficiency, and up to 40% reduced area compared to a Xilinx Virtex-4 FPGA for applications like color space conversion, FIR filtering, and DCT.
This document discusses Altera's FPGA strategy for reconfigurable hardware in industry applications. It defines reconfigurable hardware as an architecture that does not require on-the-fly timing analysis because product qualification is extensively done through temperature and cycle testing without hardware architecture changes. It then shows how programmable solutions have evolved from single CPU and DSP cores to multi-core processors and coarse-grained arrays with FPGAs moving to fine-grained, massively parallel arrays with embedded hard IP blocks. Future trends include challenges of scaling CPUs due to physical limits and the benefits of parallelism through hardware reconfiguration.
The document describes processes in VHDL. It defines a process as a concurrent statement that contains sequential logic. Processes run in parallel and can be conditioned by a sensitivity list or wait statement. Local variables retain their values between executions. It provides an example of a process with a sensitivity list and one with a wait statement. It also summarizes the general structure of a VHDL program and describes different types of process control including if-then-else, case statements, and decoders. Additional topics covered include flip-flops, counters, and finite state machines.
The document discusses requirements for enabling self-adaptivity at both the software and hardware levels. It proposes a layered model with controllers at the application, run-time environment, and hardware levels. A component-based approach is suggested to allow adaptations such as replacing or modifying components. Simulation results demonstrate how controllers at each level can coordinate to meet goals like high throughput while minimizing power usage. Reconfigurable computing platforms need to allow hardware components to be instantiated and interconnected to enable self-adaptation across software and hardware.
The document summarizes research on task scheduling techniques for dynamically reconfigurable systems. It presents (1) an integer linear programming model to formally define the scheduling problem, (2) the Napoleon heuristic scheduler to solve the problem in reasonable time based on the ILP model, and (3) experimental results validating that Napoleon obtains an average 18.6% better schedule length than other algorithms. Future work is outlined to integrate Napoleon into a general design framework and scheduling-aware partitioning flow.
The document summarizes key topics in reconfigurable computing, including motivations for reconfigurable systems, types of flexibility they provide, and challenges in reconfiguration. It discusses design flows to reduce complexity, maximizing reuse of reconfigurable modules to reduce latency, hiding reconfiguration times, and using relocation to further optimize schedules. Areas of reconfiguration and possible implementation scenarios involving relocation are illustrated.
The document discusses an approach for identifying cores for reconfigurable systems driven by specification self-similarity. It involves partitioning a specification graph into subsets of operations that can be mapped to reusable configurable modules. The approach identifies recurrent subgraphs in the specification that are good candidates for these cores. It works in two phases: first identifying isomorphic subgraph templates, and then selecting templates for implementation as reconfigurable modules based on metrics like largest size, most frequent usage, or minimizing communication. Experimental results on encryption benchmarks show the approach can cover a large portion of the specification with a small set of identified templates.
This document summarizes techniques for core allocation and relocation management in self-dynamically reconfigurable architectures. It introduces basic concepts like cores, IP cores, and reconfigurable regions. It then describes proposed 1D and 2D relocation solutions like BiRF and BiRF Square that allow runtime relocation with low overhead. A core allocation manager is introduced to choose core placements optimizing criteria like rejection rate and completion time with low management costs. Evaluation shows the techniques improve metrics like rejection rate and routing costs compared to other approaches.
The document discusses an hardware application platform developed for the hArtes project. It provides heterogeneous computing resources like DSPs, CPUs and FPGAs. Demonstrator applications focus on advanced audio processing for car infotainment and teleconferencing. The platform supports these applications by integrating different components, scaling computational power, and accommodating future additions. It also provides adequate I/O channels for audio signal processing.
The document describes the Janus system, an FPGA-based approach for simulating spin glass systems using Monte Carlo algorithms. The key aspects are:
1) Spin glass systems are computationally challenging to simulate due to the huge number of possible configurations.
2) The Janus system uses FPGAs to implement a large number of parallel update engines that can flip spins and accept/reject changes according to a Metropolis algorithm.
3) Each FPGA processor grid contains 4x4 processors that can communicate with neighbors. This allows simulations to be massively parallelized across the FPGA network.
The document outlines the agenda for the Reconfigurable Computing Italian Meeting held on December 19, 2008 at Politecnico di Milano in Milan, Italy. The agenda included four sessions on trends in reconfigurable computing, the hArtes European project, applicative scenarios, and the High Level Reconfiguration project. Each session included 3-4 presentations on technical topics within the session theme, such as FPGA strategies, multi-core signal processing, evolvable hardware, and runtime core relocation management. The meeting concluded with wishes for a merry Christmas and a happy new year.
This document provides an overview of architectural description languages (ADLs). It discusses that ADLs capture the structure and behavior of processor architectures to enable high-level modeling, analysis, and automatic prototype generation. ADLs can be classified as structural, behavioral, or mixed. Structural ADLs focus on low-level hardware details while behavioral ADLs model instruction sets for compiler generation. The document outlines different ADL types and their applications.
The document discusses design flows for partially reconfigurable systems on FPGAs. It provides an overview of Xilinx FPGA technology and configuration memory organization. It then summarizes several of Xilinx's design flows for partial reconfiguration (difference-based, module-based, EAPR). It outlines challenges with existing design flows and introduces the DRESD methodology and tools (INCA, Caronte) which aim to address these challenges by providing a more comprehensive framework for implementing dynamic reconfigurable embedded systems.
1. Integrazione del soft processor MicroBlaze nell’architettura riconfigurabile YaRA Relatore: Prof. Donatella SCIUTO Correlatore: Ing. Marco Domenico SANTAMBROGIO 27 Settembre 2006