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magdy medhat

What is Domain Name Resolution - 0 views

www.bleepingcomputer.com/...tutorial52.html

shared by magdy medhat on 08 Jun 09 - Cached
Islam TeCNo liked it
  • What is Domain Name Resolution Introduction When using the Internet most people connect to web sites, ftp servers or other Internet servers by connecting to a domain name, as in www.bleepingcomputer.com. Internet applications, though, do not communicate via domain names, but rather using IP addresses, such as 192.168.1.1. Therefore when you type a domain name in your program that you wish to connect to, your application must first convert it to an IP address that it will use to connect to. The way these hostnames are resolved to their mapped IP address is called Domain Name Resolution. On almost all operating systems whether they be Apple, Linux, Unix, Netware, or Windows the majority of resolutions from domain names to IP addresses are done through a procedure called DNS.
    • Ahmed Mansour
      Ahmed Mansour on 08 Jun 09
       
      i think it's great artical !!
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      Yes .....we know that Web sites are on servers that has IP adresses like this 217.143.56.12 for example .....this article tell us how the site name [www.google.com] is converted to the IP thanks Mans
    • magdy medhat
      magdy medhat on 08 Jun 09
       
      ya tecno ya gamedddddd mesh de elly kona bntklm feha fel microbus :D
  • Hosts File - There is a file called the HOSTS file that you can use to convert domain names to IP addresses. Entries in the HOSTS file override any mappings that would be resolved via a DNS server
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      I think this is what some spam and adware programs use .... you type a normal site Name but you go yo another site ... i think so !!
  • Netbios - This only applies to Windows machines and will only be used to map names to IP addresses if all previous methods failed. This method will attempt to map the netbios name you are trying to connect to with an IP address.
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      any body can explain this point for me ?
  • ...2 more annotations...
  • This can be changed though by changing certain registry keys
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      start -> run -> regedit this will allow you to edit the registry
  • DnsPriority = 30 LocalPriority = 200 HostsPriority = 75 NetbtPriority = 100
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      Or Simpler DnsPriority = 1 HostsPriority = 2 NetbtPriority = 3 LocalPriority = 4
Islam TeCNo

List of network protocols - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...List_of_network_protocols

shared by Islam TeCNo on 08 Jun 09 - Cached
  • IPv4 Internet Protocol version 4
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      el mafroud dah eli howa asasn e7na bensta5dmo now ...maslan el IP beta3i 217.154.89.2 ....el mafroud dah IPv4 we el mafroud ba2a ba3den netawr we neb2a IPv6 :D
  • IPv6 Internet Protocol version 6
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      المفروض ده بقي البروتوكول الجديد الي إن شاء الله هيطبق بعيدن
    • Ahmed Mansour
      Ahmed Mansour on 08 Jun 09
       
      Currently there are two types of Internet Protocol (IP) addresses in active use: IP version 4 (IPv4) and IP version 6 (IPv6). IPv4 was initially deployed on 1 January 1983 and is still the most commonly used version. IPv4 addresses are 32-bit numbers often expressed as 4 octets in "dotted decimal" notation (for example, 192.0.2.53). Deployment of the IPv6 protocol began in 1999. IPv6 addresses are 128-bit numbers and are conventionally expressed using hexadecimal strings (for example, 2001:0db8:582:ae33::29). source : http://www.iana.org/numbers/ thanks tecno for your useful comments :) keep it up(Y)
  • TCP Transmission Control Protocol UDP User Datagram Protocol
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      The Diffrance between TCP and UDP is that TCP check the packet that packets are sent correctly ... but UDP just send and don't check ....so UDP is faster than TCP but TCP check that data is sent correctly .... so UDP is used in applications like Video Streaming (You Tube) and Voice Streaming too
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
  • ...6 more annotations...
  • Jabber, an instant-messaging protocol
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      Great protcol .....also Called XMPP and this is the protocol used by Google Talk
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      port 5222 i think is it's default :D
  • Internet Relay Chat (IRC)
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      I think this is a very old chat protocol
  • ED2K, A peer-to-peer file sharing protocol
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      I think this is used by emule P2P program !! A Great P2P File Sharing program
  • FTP, File Transfer Protocol
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      use port 21 :D
    • Islam TeCNo
      Islam TeCNo on 08 Jun 09
       
      loooooooot of protocols ....any one know simple explainations ?
  • HTTP, HyperText Transfer Protocol
Ahmed Mansour

CRC Cards Tutorial - 0 views

users.csc.calpoly.edu/...crc_b

CRC oop

shared by Ahmed Mansour on 04 Jul 09 - Cached
  • Object Oriented Analysis and Design using CRC Cards
  • A CRC cards is an index card that is use to represent the responsibilities of classes and the interaction between the classes. CRC cards are an informal approach to object oriented modeling. The cards are created through scenarios, based on the system requirements, that model the behavior of the system. The name CRC comes from Class, Responsibilities, and Collaborators which the creators found to be the essential dimensions of object oriented modeling.
    • Ahmed Mansour
      Ahmed Mansour on 04 Jul 09
       
      One of the most popular methods for identifying and categorizing classes is to use class-responsibility-collaboration cards (CRC). Each CRC card represents a single class's data attributes, responsibilities, and collaborations. source : Thought Process Book..
    • Ahmed Mansour
      Ahmed Mansour on 04 Jul 09
       
      You need to create three sections on each card: - The name of the class - The responsibilities of the class - The collaborations of the class
  • Why uses CRC cards?
  • ...4 more annotations...
  • They are portable... No computers are required so they can be used anywhere. Even away from the office. The allow the participants to experience first hand how the system will work. No computer tool can replace the interaction that happens by physically picking up the cards and playing the roll of that object... The are a useful tool for teaching people the object-oriented paradigm. They can be used as a methodology them selves or as a front end to a more formal methodology such as Booch, Wirfs-Brock, Jacobson, etc.
  • Tutorial
    • Ahmed Mansour
      Ahmed Mansour on 04 Jul 09
       
      here we can found simple tutorial for illustration...
  • A CRC cards is an index card that is use to represent the responsibilities of classes and the interaction between the classes. CRC cards are an informal approach to object oriented modeling. The cards are created through scenarios, based on the system requirements, that model the behavior of the system. The name CRC comes from Class, Responsibilities, and Collaborators which the creators found to be the essential dimensions of object oriented modeling.
  • Why uses CRC cards? They are portable... No computers are required so they can be used anywhere. Even away from the office. The allow the participants to experience first hand how the system will work. No computer tool can replace the interaction that happens by physically picking up the cards and playing the roll of that object... The are a useful tool for teaching people the object-oriented paradigm. They can be used as a methodology them selves or as a front end to a more formal methodology such as Booch, Wirfs-Brock, Jacobson, etc.
  • Ahmed Mansour on 04 Jul 09
     
    This is great tutorial for CRC cards ( sort of object oriented modeling approach) \ni think it was useful for me ... hoping to be useful for all of us : ) ..
Ahmed Mansour

The Object-Oriented Thought Process - 0 views

www.developer.com/...3304881

oop programming book

shared by Ahmed Mansour on 30 Jun 09 - Cached
  • Ahmed Mansour on 30 Jun 09
     
    in this articles "The Object-Oriented Thought Process"book is discussed ..i think it's a web copy if the book... anyway it's just for who haven't this book :D ..
Ahmed One

Cryptography - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Cryptography

shared by Ahmed One on 07 Jul 09 - Cached
  • Ahmed One on 07 Jul 09
     
    I think this Concept is very important to know.
Ahmed Mansour

XHTML Frequently Answered Questions - 0 views

www.w3.org/xhtml-faq

xhtml web

shared by Ahmed Mansour on 30 Jun 09 - Cached
Ahmed One liked it
  • Ahmed Mansour on 30 Jun 09
     
    i think this is great article to know the differences between html and xhtml ..!
Ahmed Mansour

Beginner To Advanced PHP Programming Tutorials - 0 views

www.goodphptutorials.com

PHP Tutorials

shared by Ahmed Mansour on 15 Jun 09 - Cached
Ahmed One liked it
  • Ahmed Mansour on 15 Jun 09
     
    I think it's only advanced .. not beginner :D
Janos Haits

kno.e.sis | From Information to Meaning - 0 views

knoesis.org

information meaning sis online development Technology science Programming

shared by Janos Haits on 19 Mar 19 - No Cached
  • Janos Haits on 19 Mar 19
     
    "WELCOME TO KNO.E.SIS Ten years ago we had billions of web pages, and now we have roughly 5 billion people using mobile phones, collecting observations, and sharing what they think using SMS (Social Media Services), Twitter, and Facebook. Worldwide, there are currently over 40 billion mobile sensors, with more smart devices being created each day, which make up the Internet of Things."
Janos Haits

What is a Blockchain | Defi Dictionary | Web3 Daily - 0 views

www.web3daily.co/...what-is-a-blockchain

Computer tools development service Programming technology

shared by Janos Haits on 19 Mar 24 - No Cached
  • Janos Haits on 19 Mar 24
     
    "Think of a blockchain as a transaction list that is uploaded to thousands of computers around the world.  If someone sends money to you, that transaction gets added to a queue. Queued transactions are sorted into groups (aka 'blocks') and then processed by one of the thousands of computers operating in the cryptocurrency's network. Once the transaction is complete, it appears on the public transaction list, or 'chain'."
Janos Haits

Notion AI - 0 views

www.notion.so/ai

collaboration ai wiki productivity tool todo documents webapps notes artificial intelligence service software online Programming technology tools

shared by Janos Haits on 26 May 24 - No Cached
  • Janos Haits on 26 May 24
     
    "Introducing Notion AI Leverage the limitless power of AI in any Notion page. Write faster, think bigger, and augment your creativity. Like magic! Join the waitlist. Watch 1 minute demo"
Janos Haits

20 Best AI Tools For Researchers and Graduate Students - 0 views

webmoneyai.com/-best-ai-tools-for-researchers

artificial intelligence ai Artificial Intelligence tools science TECHNOLOGY service Computer development

shared by Janos Haits on 03 Jul 24 - No Cached
  • Janos Haits on 03 Jul 24
     
    "The field of intelligence (AI) is making an impact on academic research. A variety of AI tools are being created to assist researchers in simplifying their work processes and automating tasks. This enables researchers to dedicate time to thinking and analysis."
cecilia marie

Best Shield Against Computer Viruses - 1 views

I have always wondered why my files are often corrupted and to think that I have installed an antiVirus software. I always scan my external disks each time I insert them in my unit. It was only lat...

virus protection

started by cecilia marie on 04 Nov 11 no follow-up yet
Abdelrahman Ogail

10 skills developers will need in the next five years | Between the Lines | ZDNet.com - 0 views

blogs.zdnet.com/BTL

shared by Abdelrahman Ogail on 08 Jun 09 - Cached
Ahmed Mansour liked it
  • So bone up on JavaScript, CSS, and HTML to succeed over the next five years
  • Every top-flight developer I’ve met recommends learning at least one dynamic or functional programming language to learn new ways of thinking, and from personal experience, I can tell you that it works.
    • Abdelrahman Ogail
      Abdelrahman Ogail on 09 Jun 09
       
      yes, that's true (Y) some examples of these languages: LISP and Ruby. Prolog seems to be close to LISP becuase both were used in AI Applications
  • Islam TeCNo on 08 Jun 09
     
    1: One of the "Big Three" (.NET, Java, PHP) 2: Rich Internet Applications (RIAs) 3: Web development 4: Web services 5: Soft skills 6: One dynamic and/or functional programming language 7: Agile methodologies 8: Domain knowledge 9: Development "hygiene" 10: Mobile development
  • Abdelrahman Ogail on 09 Jun 09
     
    1: One of the "Big Three" (.NET, Java, PHP) 2: Rich Internet Applications (RIAs) 3: Web development 4: Web services 5: Soft skills 6: One dynamic and/or functional programming language 7: Agile methodologies 8: Domain knowledge 9: Development "hygiene" 10: Mobile development
Abdelrahman Ogail

Common Mistakes in Online and Real-time Contests - 0 views

www.acm.org/...contests.html

shared by Abdelrahman Ogail on 09 Jun 09 - Cached
Islam TeCNo liked it
  • Dynamic programming problems are to be solved with tabular methods
    • Ahmed Mansour
      Ahmed Mansour on 09 Jun 09
       
      Dynamic programming, like the divide-and-conquer method, solves problems by combining the solutions to subproblems. ("Programming" in this context refers to a tabular method, not to writing computer code) y3ney 3bara 3n 2nene bn2sem el problem el kbirr le shwit probelsm so3'ira .. we ne solve el problems deh we ngma el yab2a dh 7l lel problem el kbira :D;d see introduction to algorithms book . chapter 15
  • breadth-first search
    • Ahmed Mansour
      Ahmed Mansour on 09 Jun 09
       
      In graph theory, breadth-first search (BFS) is a graph search algorithm that begins at the root node and explores all the neighboring nodes. Then for each of those nearest nodes, it explores their unexplored neighbor nodes, and so on, until it finds the goal. ya3ney be el 3arby keda lw ana 3ndy tree maslan we el tree dh bettkwen mn shwit levels 3ady gedan.. lama hagey 23mel search 3la node mo3ina fi el tree deh hamsk el tree mn el root bet3ha ely hwa level 0 we habda2 2mshy level by level y3ney hanzl 3la el level 1 we hakaz le 3'it mal2y el node bet3ty ,,,, see this ,, it's a tutorial show how BFS algorithm is work!! http://www.personal.kent.edu/~rmuhamma/Algorithms/MyAlgorithms/GraphAlgor/breadthSearch.htm
  • Memorize the value of pi You should always try to remember the value of pi as far as possible, 3.1415926535897932384626433832795, certainly the part in italics. The judges may not give the value in the question, and if you use values like 22/7 or 3.1416 or 3.142857, then it is very likely that some of the critical judge inputs will cause you to get the wrong answer. You can also get the value of pi as a compiler-defined constant or from the following code: Pi=2*acos(0)
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      hhhhhhhhhhh ...... awl mara a3rf el mawdo3 dah we awl mara a3raf en el Pi = 2*acos(0)
    • Abdelrahman Ogail
      Abdelrahman Ogail on 09 Jun 09
       
      Thanks Islam for the info, really useful
  • ...4 more annotations...
  • You cannot always check the equality of floating point numbers with the = = operator in C/C++. Logically their values may be same, but due to precision limit and rounding errors they may differ by some small amount and may be incorrectly deemed unequal by your program
  • #define swap(xxx, yyy) (xxx) ^= (yyy) ^= (xxx) ^= (yyy)
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      I remember someone told me that it's impossible to do swaping using macros :D ...but i think it's possible
  • But recursion should not be discounted completely, as some problems are very easy to solve recursively (DFS, backtracking)
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      Some problems are much easier when using recursion
  • Having a good understanding of probability is vital to being a good programmer
  • Ahmed Mansour on 09 Jun 09
     
    for bignner acmers hoping to be useful !
  • Ahmed Mansour on 09 Jun 09
     
    in this article the author discuss the common problems that faced teams in ACM contests .. and how to avoid it !
Ahmed Mansour

PHP video tutorials .. - 0 views

www.freeforarab.com

PHP Tutorials

shared by Ahmed Mansour on 15 Jun 09 - Cached
Islam TeCNo liked it
  • Ahmed Mansour on 15 Jun 09
     
    PHP tutorials
  • ...1 more comment...
  • Ahmed Mansour on 15 Jun 09
     
    i think it's nice tutorials
  • Islam TeCNo on 15 Jun 09
     
    yes it is :D
  • Ahmed One on 16 Jun 09
     
    Nice tutorials Men :):) Go On..
Islam TeCNo

Design and Analysis of Computer Algorithms - 0 views

www.personal.kent.edu/...algorithm.html

shared by Islam TeCNo on 09 Jun 09 - Cached
Islam TeCNo liked it
  • Dijkstra's Algorithm
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      Algorithm for finding shortest path is graph
  • Huffman's Codes
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      used in data compression
  • Ahmed Mansour on 09 Jun 09
     
    recommended !! :D Mathematics for Algorithmic Sets Functions and Relations Vectors and Matrices Linear Inequalities and Linear Equations Greedy Algorithms Knapsack Problem o O-I Knapsack o Fractional Knapsack * Activity Selection Problem * Huffman's Codes * Minimum Spanning Tree * Kruskal's Algorithm * Prim's Algorithm * Dijkstra's Algorithm Divide & Conquer Algorithms Dynamic Programming Algorithms * Knapsack Problem DP Solution * Activity Selection Problem DP Solution Amortized Analysis * Aggregate Method * Accounting Method * Potential Method * Dynamic Table Hash Table Binary Search Tree Graph Algorithms * Breadth First Search (BFS) * Depth First Search (DFS) * Topological Sort * Strongly Connected Components * Euler Tour * Generic Minimum Spanning Tree * Kruskal's Algorithm * Prim's Algorithm * Single Source Shortest Path o Dijkstra's Algorithm o Bellman-Ford Algorithm String Matching * Naïve String Matching * Knuth-Morris-Pratt Algorithm * Boyer-Moore Algorithm Sorting * Bubble Sort * Insertion Sort * Selection Sort * Shell Sort * Heap Sort * Merge Sort * Quick Sort Linear-Time Sorting * Counting Sort * Radix Sort * Bucket Sort Computational Geometry Computational Complexity * Information-Theoretic Argument * Adversary Argument * NP-Completeness And Reduction Approximate Algorithms * Vertex Cover * The Traveling Salesman Problem Linear Programming Appendix 1. Parabola 2. Tangent Codes References hoping to discuss these algorithms with each other !
  • Ahmed Mansour on 09 Jun 09
     
    this web page contain a lot of algorithms discussed with simple ways !! i think these maybe useful Tutorials !! hoping to discuss these algorithms with each other !
  • Islam TeCNo on 09 Jun 09
     
    Ohhhhhhh .....Gammmeeeeeeeeed gedan ya Mans ...thanks
Islam TeCNo

Neuroplasticity - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Neuroplasticity

shared by Islam TeCNo on 25 Jun 09 - Cached
  • Neuroplasticity (also referred to as brain plasticity, cortical plasticity or cortical re-mapping) is the changing of neurons and the organization of their networks and so their function by experience. This idea was first proposed in 1892 by Santiago Ramón y Cajal the proposer of the neuron doctrine though the idea was largely neglected for the next fifty years.[1] The first person to use the term neural plasticity appears to have been the Polish neuroscientist Jerzy Konorski.[2]
    • Abdelrahman Ogail
      Abdelrahman Ogail on 25 Jun 09
       
      This is why when a person thinks more he/she be more smarter!
    • Islam TeCNo
      Islam TeCNo on 25 Jun 09
       
      3azeem .....bas deh mesh 7agat related l CS ya Zi3'az
    • Abdelrahman Ogail
      Abdelrahman Ogail on 25 Jun 09
       
      How said that? It's related to Artificial Neural Networks that require understanding of actual Human Neurons. BTW, plasticity principle is used in Games AI where the Controlled-AI determines if it forgot what happened or still remember it and seeks to revenge
    • Islam TeCNo
      Islam TeCNo on 25 Jun 09
       
      oooooooooh ........ 3'reaaaaaat
Islam TeCNo

How to Use the Windiff.exe Utility - 0 views

support.microsoft.com/159214

shared by Islam TeCNo on 17 Jun 09 - Cached
  • This article describes how to use the Windiff.exe utility, a tool that graphically compares the contents of two ASCII files, or the contents of two folders that contain ASCII files, to verify whether they are the same. The file byte count and the creation date are not reliable indications.
    • Abdelrahman Ogail
      Abdelrahman Ogail on 17 Jun 09
       
      This is pretty useful when comparing 2 versions of code you wrote before
    • Islam TeCNo
      Islam TeCNo on 17 Jun 09
       
      I think TortoiseSVN come with a tool for comparing files and i expect it will be better :D:D ......Thanks ZiKaS
Islam TeCNo

Comprehensive Mathematics for Computer Scientists: Info - 0 views

math.ifi.uzh.ch/info.html

shared by Islam TeCNo on 17 Jun 09 - Cached
  • MathML is an XML standard by W3C and, embedded in XHTML,
    • Islam TeCNo
      Islam TeCNo on 17 Jun 09
       
      Great ..... I think i will take alook about it's standards
Islam TeCNo

Model-view-controller - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...2%80%93view%E2%80%93controller

shared by Islam TeCNo on 09 Jun 09 - Cached
  • Model–view–controller (MVC) is an architectural pattern used in software engineering. Successful use of the pattern isolates business logic from user interface considerations, resulting in an application where it is easier to modify either the visual appearance of the application or the underlying business rules without affecting the other. In MVC, the model represents the information (the data) of the application; the view corresponds to elements of the user interface such as text, checkbox items, and so forth; and the controller manages the communication of data and the business rules used to manipulate the data to and from the model.
    • Abdelrahman Ogail
      Abdelrahman Ogail on 09 Jun 09
       
      MVC one of the important patterns used at any software. Especially in Web Development, Database Systems and sure in Game Development
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      please ya zikas 7ot more comments l eni mesh fahem awi ...ana eli fahmo eni afsl el GUI 3an el core code
  • MVC is often seen in web applications, where the view is the actual HTML or XHTML page, and the controller is the code that gathers dynamic data and generates the content within the HTML or XHTML. Finally, the model is represented by the actual content, which is often stored in a database or in XML nodes, and the business rules that transform that content based on user actions.
    • Islam TeCNo
      Islam TeCNo on 09 Jun 09
       
      i think this is like PHP or ASP page .... you just See HTML (view) that is Generated by PHP/ASP Code (controller) that gather data from Database (content)
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