What is Machine Learning and How Does It Impact Our Lives?

What is Machine Learning and How Does It Impact Our Lives?

हिंदी ट्यूटोरियल Something Different (Study Materials,New Think)   04:23

 What is Machine Learning and How Does It Impact Our Lives?

Machine Learning (ML) is a subset of artificial intelligence (AI) that enables computers to learn from data and make decisions or predictions based on that data without being explicitly programmed. It uses algorithms to analyze data, learn from it, and make informed decisions based on what it has learned.

How Does Machine Learning Work?

1. Data Collection: Machine learning begins with data. The more data available, the better the model can learn. This data can be anything from numbers to text, images, or even clicks on a website.

2. Data Preparation: Data is cleaned and formatted to make it usable for machine learning algorithms. This may involve removing duplicates, handling missing values, and converting data into a format suitable for analysis.

3. Model Training: The core of machine learning is training a model. This involves feeding the prepared data into a machine learning algorithm, which processes the data and adjusts its parameters to learn the patterns and relationships within it.

4. Model Evaluation: After training, the model is evaluated using a separate set of data to determine its accuracy and effectiveness. If the model's performance is satisfactory, it can be deployed for real-world use. If not, further adjustments and retraining are required.

5. Prediction and Decision Making: Once trained, the model can make predictions or decisions based on new data. For example, a model trained to recognize cats in photos can identify cats in new, unseen images.

Impact of Machine Learning on Our Lives

• Healthcare: Machine learning is used for diagnosing diseases, personalizing treatment plans, and predicting patient outcomes.
• Finance: It helps in fraud detection, credit scoring, and algorithmic trading.
• Retail: Personalizes shopping experiences through recommendations and targeted marketing.
• Transportation: Powers self-driving cars and optimizes routes for delivery services.
• Entertainment: Used by streaming services to recommend movies, music, and shows based on user preferences.

Machine learning is transforming industries by enabling more intelligent, data-driven decisions, improving efficiency, and creating new opportunities for innovation.

What is Cloud Computing and How Does It Work?

What is Cloud Computing and How Does It Work?

टैकनोलजी Something Different (Study Materials,New Think)   22:29

 What is Cloud Computing and How Does It Work?

Cloud computing is a technology that allows users to access and store data, applications, and computing resources over the internet, rather than on a local computer or server. The "cloud" refers to servers that are accessed over the internet and the software and databases that run on those servers.

How Does Cloud Computing Work?

1. Service Models: Cloud computing is typically offered in three main service models:

   • Infrastructure as a Service (IaaS): Provides virtualized computing resources over the internet, such as virtual machines, storage, and networks. Examples include AWS EC2, Microsoft Azure, and Google Compute Engine.
   • Platform as a Service (PaaS): Offers a platform allowing customers to develop, run, and manage applications without dealing with the infrastructure. Examples include Google App Engine, Microsoft Azure App Services, and Heroku.
   • Software as a Service (SaaS): Delivers software applications over the internet, typically on a subscription basis. Examples include Google Workspace, Microsoft Office 365, and Salesforce.
     
     
     

2. Deployment Models: Cloud computing can be deployed in various ways:

   • Public Cloud: Services are offered over the public internet and are available to anyone who wants to purchase them. This model provides high scalability and cost-effectiveness.
   • Private Cloud: Services are maintained on a private network and are used exclusively by a single organization. This model offers enhanced security and control.
   • Hybrid Cloud: Combines public and private clouds, allowing data and applications to be shared between them. This model provides flexibility and more deployment options.

3. Working Mechanism: Cloud computing works by virtualizing physical computing resources such as servers and storage. Virtual machines and containers run on these resources, and data is stored in cloud-based storage systems. Users access these resources via the internet using web browsers or dedicated applications.

Why Use Cloud Computing?

• Scalability: Easily scale resources up or down based on demand.
• Cost Efficiency: Pay only for what you use, reducing capital expenditure.
• Accessibility: Access resources from anywhere, on any device, with an internet connection.
• Disaster Recovery: Cloud providers often offer robust backup and recovery options.
• Security: Many cloud providers offer advanced security features to protect data.

Create two classes DM and DB which store the value of distances. DM stores distances in metres and centimeters and DB in feet and inches.

Create two classes DM and DB which store the value of distances. DM stores distances in metres and centimeters and DB in feet and inches.

हिंदी ट्यूटोरियल Something Different (Study Materials,New Think)   19:28

Write  a program that can read values for the class  objects and add one object DM with another object of DB. Use a Friend Function to carry out  the addition operation. The object that stores the results may be a DM object or DB object, depending on the units in which the

Coding:

#include<iostream.h>

#include<conio.h>

class DB;

class DM

{

 float meter,centi;

 public:

 void getdata()

 {

  cout<<"\nEnter the distance in(meter-centimeter):";

  cin>>meter>>centi;

 }

 void display()

 {

  cout<<"\nThe distance is:";

  cout<<meter<<" meters and "<<centi<<" centimeter";

 }

 friend void add(DM &,DB &);

};

class DB

{

 float inch,feet;

 public:

 void getdata()

 {

  cout<<"\nEnter the distance in(feet-inch):";

  cin>>feet>>inch;

 }

 void display()

 {

  cout<<"\nThe distance is:";

  cout<<feet<<" feet and "<<inch<<" inch";

 }

 friend void add(DM &,DB &);

};

void add(DM &a,DB &b)

{

 int ch;

 cout<<"\nPress 1 for meter-centi:";

 cout<<"\nPress 2 for feet-inch:";

 cout<<"\nEnter your choice:";

 cin>>ch;

 if(ch==1)

 {

  DM d;

  int c=(a.meter*100+a.centi+b.feet*30.48+b.inch*2.54);

  if(c>=100)

  {

   d.meter=c/100;

   d.centi=c%100;

  }

  else

  {

   d.meter=0;

   d.centi=c;

  }

  d.display();

 }

 else

 {

  DB d;

  int i=(a.meter*39.37+a.centi*.3937008+b.feet*12+b.inch);

  if(i>=12)

  {

   d.feet=i/12;

   d.inch=i%12;

  }

  else

  {

   d.feet=0;

   d.inch=i;

  }

  d.display();

 }

}

void main()

{

 clrscr();

 DM a;

 DB b;

 a.getdata();

 b.getdata();

 add(a,b);

 getch();

}

Output:

What is XML?

What is XML?

XML Something Different (Study Materials,New Think)   04:16

  Ø  What is XML?

·         XML is the eXtensible Markup Language.

XML

·         Became a W3C Recommendation in 1998.

·         Tag-based syntax, very much like HTML.

·         We get to make up our own tags (or we can use an existing tag set to solve a particular problem).

·         Foundation for several next-gen Web Technologies like XHTML, RSS (Blogs), AJAX, Web Services.

·         XML does not replace HTML.

  Ø  What does XML do?

·         XML is used to structure and describe information.

·         Intended to be used with the Internet.

·         XML can be used as a way to interchange data between disparate systems.

  Ø  Related XML Technologies:

·         XPath:

ü  eXtensible Path Language.

ü  Used to extract data from inside an XML file.

ü  Uses a path-like syntax, similar to directory or folder paths like “drive:/folder/folder/file”

·         XSLT:

ü  eXtensible Stylesheet Language Transformations.

ü  Styling language that takes an XML file and “transforms” it into  something else, like HTML, PDF, ASCII, or even another XML file.

·         XQuery:

ü  Used to perform query functions on XML data, similar to SQL for databases.

·         XPointer and XLink:

ü  Used for creating hyperlinks to XML documents and arbitrary points within XML documents.

  Ø  Example: Describing Information

·         Typical Information found on a business card:

Santosh Tewari

(415) 555-4567 (mobile)

(800) 555-9876 (work)

(510) 555-1234 (fax)

imstkgp@gmail.com

·         Same business card data, expressed in XML:

<BusinessCard>

            <Name>Santosh Tewari</Name>

<phone type=”mobile”>(415) 555-4567</phone>

<phone type=”work”>(800) 555-9876</phone>

<phone type=”fax”>(510) 555-1234</phone>

<email>imstkgp@gmail.com</email>

                        </BusinessCard>        

  Ø  Advantages Of XML:

·         Content is kept separately from any notion of presentation.

·         Information can be easily read and understood.

·         Specific tag sets that target specific problems can be easily created.

·         XML is an open format that can be processed by any XML aware application, like a browser, word processor, spreadsheet, etc.

·         XML data can be exchanged between systems that were designed to do so.

  Ø  Disadvantages Of XML:

·         XML is not especially good at handling very large amount of data.

·         XML can quickly become more difficult to read if a lot of information is included in one file.

·         Certain types of data (images, other binary data) are not represented well in XML.

  Ø  Proper XML Syntax:

·         All XML documents have a single root tag.

·         XML documents must be “well-formed”

ü  Empty tags, i.e. tags that do not contain any content themselves, must be closed with />

i.e. Instead of <elem></elem> use <elem />

ü  Attributes cannot be minimized

i.e. <element attr> is wrong – must do <element attr=”atrr”>

Attributes values must always be inside quotes, either single or double:

i.e. <element attr=val> is wrong – must do <element attr=”val”>

ü  Tags must br properly nested inside each other

<elem1><elem2></elem1></elem2> is wrong – always do <elem1><elem2></elem2></elem1>

  Ø  Contents of XML Files:

·         XML Declaration:

<?xml version=”1.0” encoding=”utf-8” standalone=”yes” ?>

·         Elements (Sometimes called tags)

<element>, just like we’ve used in HTML.

·         Attributes

<element attr=”val”>, again like HTML.

·         Comments

<!-- XML Comment -->

·         Character Data Sections

<! [CDATA [This is some text & data]] >

·         Processing Instructions

<?SpellCheckMode mode=”us-english” ?>

·         Entity References

Character(&#60;) and General (&copyright”;)

  Ø  The XML Declaration:

<?xml version=”1.0” encoding=”utf-8” standalone=”yes” ?>

·         Optional, though the W3C recommends including it

§  Identifies the file as being XML.

§  Provides a place for the encoding and standalone declarations.

§  Must be at very beginning of file - not even whitespace before it.

·         The encoding declaration identifies the encoding of the document

§  UTF-8 is assumed if we don’t state otherwise.

·         The standalone declaration states whether the document stands by itself or references some external markup.

  Ø  Elements (Tags):

·         Elements must have a valid name

§  Begin with underscore _ or letter, then have zero or more letters, digits, periods, hyphens or underscore.

§  Can’t use string “xml” in any case combination.

·         Valid Names:

<_Element1>

<My.Element>

<My.Ele_ment>

·         Invalid Names:

<1Tag> (Wrong: can’t begin with numbers)

<#Element> (Wrong: invalid character in name)

<Element&Name> (Wrong: invalid character in name)

<XmL> (Wrong: xml is reserved)

  Ø  Attributes:

·         Attributes are specified on the start tag of an element.

·         Must start with underscore ( _ ) or letter, then have zero or more letters, digits, periods, hyphens or underscore.

·         Attributes that starts with “xml” are reserved.

·         Attributes can only appear one time on a given element. For example, <element attr1=”a” attr1=”b”> is wrong.

  Ø  Comments:

·         Comments begin with <!-- and end with -->.

·         They can contain any characters except a double hyphen (&, <, etc. are allowed)

·         Comments can appear pretty much anywhere in an XML file as long as they are not inside another markup element and are not before the xml declaration.

<element <!-- comment -->> is wrong.

<element>

            <!-- Comment -->

</element> is correct.

  Ø  Character Data Section:

·         Used to contain character data that we want to be part of the document content but don’t want the parser to try and parse.

·         Have the form <! [CDATA[Some text here]]>

·         Typically used when the character data contains a lot of characters (like & or <) that would otherwise be illegal in XML markup.

·         They are not nest like elements- we can’t have a CDATA section inside another CDATA section. 

  Ø  Processing Instructions:

·         Processing instructions are special instructions that are only of interest  to the application that is processing the XML.

·         Have the form <?target instruction ?>

§  The “xml” target name is reserved.

§  Target names can start with underscore ( _ ) or letter, then have zero or more letters, digits, periods, hyphens or underscore.

·         Example: Our application has different spell checking modes, and we want to be able to specify the mode in the document:

<?SpellCheckMode mode=”us-english”?>

  Ø  Entities:

·         Provides a way to help shorten and modularize our XML document.

·         Provide a way to include characters that would otherwise be illegal to type in markup.

·         General Entities:

We can define these to be whatever we want, and they will be replaced by the parser with a full string.

&copyright; or &author;

·         Character Entities:

&#060;

&amp; or &quot;

  Ø  Valid XML Documents:

·         A valid XML Document is one that has been tested against a set of rules.

·         These rules are specified as either DTD (Document Type Definition) or XML Schema files.

·         DTDs are simpler but less powerful and don’t use the same syntax as XML itself.

·         Schema ismore powerful but more complex and is written using XML syntax.