viernes, 18 de mayo de 2012

Definitions(Network) Alejandro Ruiz


Router: is a hardware device used for the interconnection of computer networks that ensures the routing of data packets between them or determine the best route to take.
Mac Address: A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are used for numerous network technologies and most IEEE 802 network technologies, including Ethernet. Logically, MAC addresses are used in the Media Access Control protocol sub-layer of the OSI reference model.
HUB: A hub is a device that allows you to centralize the network cabling and to enlarge. This means that the device receives a signal and repeats this signal emitting it through its different ports.
IP: An IP address is a numeric label that identifies, in a logical and hierarchical, with an interface (an element of communication / connection) of a device (usually a computer) within a network using IP (Internet Protocol), which corresponds the network layer of TCP / IP. This number must not be confused with the MAC address is a48-bit identifier to uniquely identify the network card and not depend on the connection protocol or network used. The IP address can change very often changes in the network or the device within the network manager to assign IP addresses, decide to assign an IP(for example, DHCP), this form of IP address assignment is called dynamic IP address (usually abbreviated as dynamic IP).
Internet sites which by their nature need to be connected, generally have a fixed IP address (commonly fixed IP or static IP), this does not change with time. Mail servers, DNS, FTP servers and public web pages must necessarily have a fixed or static IP address, since this form is allowed its location on the network.
The computers are connected through their IP addresses. However, we human beings is more convenient to use another notation easier to remember, as domain names, the translation between them is resolved by the domain name servers DNS, in turn, facilitates the work in case of change of IP address, because you can just update the information in the DNS server and other people will not learn as they continue accessing the domain name.
LAN: A local area network, local network or LAN (local area network of English) is the interconnection of one or more computers and peripherals. Its size is physically limited to a building or an environment of 200 meters with repeaters could reach the distanceof a field of 1 kilometer. Its most widespread application is the interconnection of personal computers and workstations in offices,factories, etc..
Topology: Topology (Greek τόπος, "place" and λόγος, "study") is the branch of mathematics devoted to the study of those properties of solids that remain unaffected by changes continuas.1 is a discipline that studies the properties of topological spaces and continuous functions. Topology is concerned with concepts such as proximity, number of holes, the kind of consistency (or texture) having an object, compare and classify objects and also other attributes which include connectivity, compactness, or metrizability nonmetricity so on.

NIC: A network interface controller (Also known as a network interface card, network adapter, LAN adapter and by like terms) is a computer hardware component    connects a computer to that a computer network.
Whereas network interface controllers Were Commonly Implementedon expansion cards plug Into That   computer bus, the low cost and ubiquity of the Ethernet standard MOST newer computers Means That Have a network interface built Into the motherboard.
Protocol: In computing, a protocol is a set of rules used by computers tocommunicate with each other through a network via message exchange. This is a rule or standard that controls or enables communication in its simplest form, can be defined as rules that dominate the syntax, semantics, and synchronization of communication. The protocols can be implemented by hardware, software, or a combination thereof. At its lowest level, it defines the behavior of a hardware connection.
Switch: A switch is a digital device logical interconnection of computer networks operating in the data link layer of the OSI model. Its function is to interconnect two or more network segments, similarly to the network bridges, passing data from one segment to another in accordance with the destination MAC address of the frames on the network.
A switch in the center of a star network.
The switches are used when you want to connect multiple networks, fusing into one. As the bridges, as they function as a filter in the network, improve the performance and safety of local area networks.

Wan: A Wide Area Network (WAN) is a telecommunication network that covers a broad area (i.e., any network that links across metropolitan, regional, or national boundaries). Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. In essence this mode of telecommunication allows a business to effectively carry out its daily function regardless of location.[1]
This is in contrast with personal area networks (PANs), local area networks(LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively.



martes, 8 de mayo de 2012

Multimedida Search Engines


This Multimedia Search Engine is about using face recognition and text together or separated, and using this in a search engine from your mobile or smartphone. It also search ranks the pages that appear and puts them in order of importance.
Personally, I think that this will definitely willl exist in the near future. 

Constructing Queries


The search queries I would do is in the example, what i learned in my biology class, is it probable that there is life in other planets? I will search it with different words. The three tags that I would do will be:
Is there life in other planets?
Do aliens exist?
There is any clue of life in other planets?
The best way to search for something is by using tags, this are how search engines divide web pages by categories to make an easier search.
The best way to find what you are searching is by using key word/terms related to this subject.

The Filter Bubble



1. When we both searcched the same query we noticed that the only difference was in the order of the links, this may be due to the very little searchs we do while logged into our google accounts.
2. Google collects information about its users based on their activity in different sites, from its search page to Gmail to Youtube to phone running its operative system. No data is collected while the user is not logged in. You can't opt-out shared search data on Google. This is due to the new policy. For example on youtube google collects the amount of videos you saw and recommend you some other videos with the same tags.

Search Engines



1b.The first page to appear in Google for searching 'electric cars' was Wikipedia, in which the words 'electric car' appeared 136 times throughout the whole article. This page, used 182 references to collect all the information. Google is the reason why most people visit Wikipedia.  The co-founder of Google, Sergey Brin, believes that Wikipedia is “one of the greatest triumphs of the Internet” and “an invaluable resource to anyone who is online”. Google loves Wikipedia, there are 99% chances that, if Wikipedia has an article based on query, it will be shown on the first page.http://www.pagetrafficbuzz.com/wikipedia-appears-page-google-searches/13269/
The second search engine we used to look for ‘electric cars’ was yebol.  I consider that the first link (http://www.thedailybeast.com/newsweek/2009/01/09/switched-on-highways.html) was ranked in that position because of the amount of times that the word ‘electric ’ and ‘cars’ appear throughout the article.  In addition, yebol may recognize how popular this webpage is.
c. In both search engines, Bing and Google, their ranking algorithms are different, for pone si de, bing rank its web pages throughout a program calle CTR, clic through rate, it is said that your web pág will rank well ir ir you hace popular pág titles, text-heavy pages, and outbound links then ranking will improve. Al so, old sites get better ranking, web sites rom well known organizations will get good rankings. Age of domains matter mucho in te ranking mechanism of bing. Finnally sites with heavy flash content will get a good ranking.
on te other hand' Google uses a programa named Page Rank, this is a link analysis algorithm, that assigns a numeral weightening to each element of a hyperlinked set of documents, such as the WWW, with te porpuse of measuring its relative importance within te set. The algorithm hay be applied to any collection of entities with reciprocal quotatiins and entities.
2. Search Engine Optimization is a process where the search engines are optimized for the people who enter, it makes it more "friendly". The most important objective is the choosing sites from the words that the user imputs in the search engine. When a page is more visited that the others, it tends to be in the top of the page when you look for something. Thats part of the process of SEO. Also, the SEO targets to optimized other type of categories, such as images, videos or news.
http://www.marketingterms.com/dictionary/search_engine_optimization/
 
PageRank is the way that Google ranks the pages from the keywords you've input. Depending on what you had written, PageRank analyzes the links and quality of them. If the hits are higher and better for what you are seraching, the most recomended pages will be at the top.
http://www.motive.co.nz/glossary/pagerank.php
http://www.topwebsitetips.com/articles/GooglePageRankDefinitionHistoryDevelopment.aspx
3. When we searched Miserable failure on Google, we found that many links were related to the ex-president of United States, George Bush, before when people searched “miserable failure” the first link that appeared was his biography, although the 2 words never appeared in the article. But that happened because Google doesn’t search only about the content of the page but also about other links the page has. This is called Google Bombing, when you relate one phrase to certain articles which maybe have nothing to do, but they appear when searched.
When we searched Talentless hack, we found that most pages talked about Google bombing, then we found an article that explained that Adam Mathes who has a weblog and an online journal of his thoughts and investigations, used a bomb to make his friend page appear when talentless hack was searched on Google. This may be used by businesses or corporations to improve their position in search results.

martes, 6 de marzo de 2012

Terra 2050


"2/3 of the language will disappear by the end of the 22nd century." .
This link, which I think is valid, shows how languages die within time, I think is important to place it here for you to know how is that the languages disappear.
http://humanities.uchicago.edu/faculty/mufwene/publications/HOW_LANGUAGES_DIE.pdf


This second page seems to be reliable because it includes work from BBC, which is a well known reporting company. In this source it is also involved UNESCO.


http://worldfocus.org/blog/2010/03/03/cultures-around-the-world-at-risk-of-losing-their-languages/9925/

"Technology makes family spend less time together.".
In the following link explains how each time more families start to spend less time together for example by not having dinner. I think this is a valid link because people who wrote this made a previous research and even have more information because they leave you their link for you to ask them questions if neccesary.
This link is a study made by a USA newspaper in which it explain how people use more internet to commuinicate than to do face-to-face contact with other people by using pages like Facebook or Myspace. For me its a valid source because this was written by a reporter from the "Usa Today" Newspaper.