History and Development of Programming Languages

History and Development of Programming Languages Yash Ojha Introduction Programming languages play the most important role in the creation of various  Software’s. Application, and Webpages etc. Just because of the existence of programming languages today everything related to New Technology is possible. For example the various Social Networking sites that we use is a result of Programming Language, the Mobile phones that we use in our daily life is a brilliant outcome of programming as every IC in the circuit of the mobile phones are programmed due to which it works. The most important outcome of Programming Language is the creation of Operating Systems (OS). OS is something without which we cannot use our PC’s or Laptop’s or even our mobile phones. OS acts as a base for every single function of a device to work in short it provides an important platform for the working. If no programming languages were introduced then today it nearly impossible for the people to use computers, mobile phones, servers, and various other things. But thanks to the developers of the various types of Languages that made peoples life very easy and mobile. 1 All about JAVA! Java was developed by James Gosling at Sun Microsystems in 1992 and was officially  released in 1995. JAVA Technology is a programming language that is used for meeting  the objectives of current challenges and opportunities in the present computing realm. Java Virtual Machine (JVM): JVM is an Interpreter for JAVA programming language,   i.e., it is the only way to convert a Byte Code into machine language. The Byte Code  cannot be converted using any technique other than the JVM. Therefore as I said above Byte Code somehow helps Java in being secure. Java Runtime Environment (JRE): We all know that that the major problem with the programming languages before JAVA was platform dependency i.e., if we want to run the code compiled in Windows Xp in Linux, this was not possible as for that we need a special compiler which works in Linux only. So to solve this problem JRE was launched and became a part of java. Every Operating System have some mandatory files that are needed to run java on that particular OS. So in short JRE in the collection of all those mandatory files needed to run java on various OS’s plus JVM. Due to JRE today it is possible to use the code written in some OS in any other OS. So JRE made JAVA completely PLATFORM INDEPENDENT. The byte code is loaded into JVM using the Class Loader. JIT (Just in Time): JIT works as a verifier. It verifies the Byte Code first whether it is infected or not or whether it is holding some kind of virus in it or not. If found clean it forwards the Byte Code to the JVM for further process. JIT is completely responsible for the SECURITY of JAVA. Let’s see the whole process graphically. A.java A.class 2 Now I’ll show you a basic program in java with its output. class Sample { public static void main(Strings) { System.out.println(Hello World); } } Let’s talk about the main() function. The main function is made up of 5 things. Access Specifier Function Name public static void main() Parentheses Access Modifier Return Type Java Fundamentals All programming languages have its own syntax and reserved keywords. JAVA also  has these kind of language fundamentals.   Basic fundamentals of java includes: Java Keywords Data Types Legal and Illegal Identifiers Operators Let’s see every fundamental in detail. Java Keywords: Keywords are the words that convey special meaning to the language compiler. These are reserved for special purposes and must not be used as normal identifier names. Data Types: Data types are keywords are means to identify the type of data and how much memory a variable needs to carry out a particular operation. Data types are divided into two types: Primitive Data Types (8 types) Non Primitive Data Types (User Defined 3 types) Legal and Illegal Identifiers: Identifiers are building blocks of a program and are used as the general terminology for the names given to different parts of the program viz. variables, objects, classes, function, arrays etc. 3 Operators: The operations being carried out are represented by operators. The operations (specific tasks) are represented by operators and the objects of the operation are referred as operands Classes in JAVA Class is a collection of objects of similar types of objects. Objects are nothing but a buffer or an area and are defined by something which have some property and behaviour. In java objects are created in the HEAP Memory inside the Java Virtual Machine. Syntax for creating an object in java: Class name object name=new class name(); new is a keyword of java which when used creates an object in the HEAP. Now whenever we use the new keyword a space in created in the HEAP memory inside the JVM for the object at runtime. When we print the reference variable of some class then it prints 3 things: Class name â€Å"@† symbol Hash code Graphical representation of HEAP and other memory areas available inside the JVM. 4 Principal of Object Oriented Programming (OOP) The object oriented programming has been developed with a view to overcome the draw backs of conventional programming approaches. The OOP approach is based on certain concepts that helps it to attain its goal of overcoming the drawbacks of conventional programming approaches. There are 4 general concepts of OOP: Polymorphism Inheritance Abstraction Encapsulation (it’s a part of abstraction) Polymorphism: It is the ability for a message or data to be processed in more than one form or it can simply be defined as one name used for many tasks which is used to speed up the compilation time. Inheritance: This is a parent-child relationship between two classes. In this, the child class object inherits some properties of the parent class object. Abstraction Abstraction refers to the act of representing essential features without including the background details or explanations. Abstraction is divided into two parts: Abstract Class: Abstract class is used to define a rule. Rules in abstract class: All the task which we can perform in a normal java class can also be performed in an abstract class. In abstract class we can define normal method as well as abstract methods. It is not compulsory to have at least one abstract method in a class. If a method is abstract then the class should be abstract. We cannot instantiate (cannot create the object) of abstract class. Abstraction is achieved using extends keyword. Interfaces: Interface are pure abstract methods. A class implements an interface, thus inheriting the abstract methods of an interface. An interface contains the behaviour that the class implements. The class that implements interface is abstract. Syntax: interface my; { declaration of methods;} 5 Rules in Interface: We cannot instantiate of an interface. Interface are used to define the rules purely. All the methods of an interface are by default public and abstract. In case of interface we use the keyword implements. If we define any data member inside an interface than by default it becomes static and final. Interface is used to achieve Multiple Inheritance. Packages Packages is a collection of classes and interfaces. No class can exist without a package included in it. This is the rule of OOP’s. But when we open a class we don’t always make a package in that class, so in this case the rule of OOP’s is violated. So to avoid this problem JAVA has given a feature in its compiler due to which when we compile the program, the compiler automatically creates a package of the respective class during the compile time. Command to compile the program with a package: javac –d . p.java Name of the project current directory is the same location as the class where the package is to be made. Destination. –d . is called the switching tool. Program with a package can be executed by using the Command: Java . Exception Handling When any abnormal condition that comes in a code which can be handled then that situation is known as Exception Handling. For every exception there are exception classes and exception methods to handle that exception in java by default. We can easily handle these unwanted exceptions by using try and catch block. Try is used to detect exceptions in a program and catch is used to handle that The â€Å"finally† block: If an exception occurs in a program then the try and catch block will be executed and then the program terminates in normal condition. But in case of finally before the termination of program finally block also executes. Syntax: try{-} catch{-} finally{-} 6 Threads Every process is divided into two categories: Heavy Weight Processes Light Weight Processes Heavy Weight Processes: These processes are those processes which stores a separate area in RAM. Light Weight Processes: These processes are those processes which occupy memory under the heavy weight processes. These light weight processes which occupy memory under the heavy weight processes are known as Threads in JAVA. Basically there are two ways in which we can make a thread: By directly implementing the runnable interface. By internally implementing the thread class in interface runnable and extending thread class. Multithreading Every part of a program is called a thread and every thread defines a separate path   of execution. Java provides a building support for multithreading program. The multithreaded  program contains two or more parts that execute concurrently. Priority of which thread will start working first is decided by a program named as Thread   Scheduler which is a program of the Operating System. It gives the priority randomly. Synchronization To avoid the corruption of data we use the concept of synchronization in threads. When we share a single object into multiple threads then the chance of data  Corruption arises and to avoid this we need the concept of synchronization. The keyword synchronized is applied on the function where the variables are  assigned values. Due to the concept of synchronization only one thread  executes at a time. Input/Output Stream Streams are nothing but a special type of buffer. In terms of JAVA streams are flow of bytes. Benefits of I/O Stream: Execution time reduces. Performance Enhances. Network congestion chances reduces. We get bulk data at a time. Streams are divided into two types: High Level Stream Low Level Stream High level stream cannot be used alone, whenever we want to use a high level stream we have to connect it by a low level stream. Stream Byte Stream Character Stream Console Based Unicode Input Output Reader Writer Stream Stream Byte Stream Input Stream Output Stream FileInputStream FileOutputStream BufferedInputStream BufferedOutputStream DataInputStream DataOutputStream ObjectInputStream ObjectOutputStream ByteArrayInputStream ByteArrayOutputStream PipedInputStream PipedOutputStream 8 Character Stream ` Reader Writer File Reader File Writer Buffered Reader Buffered Writer import java.io.*; class Demo0 { public static void main(String args[]) { FileOutputStream fout=new FileOutputStream(â€Å"a.txt†); PrintStream ps=new PrintStream(fout); ps.println(â€Å"hello†); ps.println(â€Å"hey†); System.setOut(ps); System.out.println(â€Å"m†); } } This is a sample program of how to write a file by coding in JAVA. Serialization Serialization is the process using which we can convert an object into a stream. If we have to use an object only once and then we need to use the same object after a long time then we use the concept of serialization. Features of Serialization: Only the object of that class can persist which implements serializable interface. If the parent class implements serializable interface then there is no need for child class to implement serializable. In case of serialization transient data members cannot persist. In case of serialization static data members cannot persist. Only the non-static data members can persist. If we make any variable transient that means those variables are unwanted now and will  get no memory in the HEAP inside the JVM. Serializable interface is a type of marker interface. Marker interface are those interface  which have no methods.

Yogurt Fermentation

Yogurt Fermentation Yogurt is made by lactic acid fermentation. The main (starter) cultures in yogurt are Lactobacillus bulgaricus and Streptococcus thermophilus. The function of the starter cultures is to ferment lactose (milk sugar) to produce lactic acid. The increase in lactic acid decreases pH and causes the milk to clot, or form the soft gel that is characteristic of yogurt. The fermentation of lactose also produces the flavor compounds that are characteristic of yogurt. Lactobacillus bulgaricus and Streptococcus thermophilus are the only 2 cultures required by law (CFR) to be present in yogurt.Other bacterial cultures, such as Lactobacillus acidophilus, Lactobacillus subsp. casei, and Bifido-bacteria may be added to yogurt as probiotic cultures. Probiotic cultures benefit human health by improving lactose digestion, gastrointestinal function, and stimulating the immune system. Lactic acid fermentation is the simplest type of fermentation. Basically, it is a redox reaction. In anaerobic conditions, the cell’s primary mechanism of ATP production is glycolysis. Glycolysis reduces – that is, transfers electrons to – NAD+, forming NADH.However, there is only a limited supply of NAD+ available in a cell. For glycolysis to continue, NADH must be oxidized – that is, have electrons taken away – to regenerate the NAD+. This is usually done through an electron transport chain in a process called oxidative phosphorylation. However, this mechanism is not available without oxygen. Instead, the NADH donates its extra electrons to the pyruvate molecules formed during glycolysis. Since the NADH has lost electrons, NAD+ regenerates and is again available for glycolysis.Lactic acid, for which this process is named, is formed by the reduction of pyruvate. The total fermentation process to make yogurt is fairly simply. The milk mixture is pasteurized at 185 °F (85 °C) for 30 minutes or at 203 °F (95 °C) for 10 minutes. A high heat t reatment is used to denature the whey (serum) proteins. This allows the proteins to form a more stable gel, which prevents separation of the water during storage. The high heat treatment also further reduces the number of spoilage organisms in the milk to provide a better environment for the starter cultures to grow.Yogurt is pasteurized before the starter cultures are added to ensure that the cultures remain active in the yogurt after fermentation to act as probiotics; if the yogurt is pasteurized after fermentation the cultures will be inactivated. Next, the blend is homogenized (2000 to 2500 psi) to mix all ingredients thoroughly and improve yogurt consistency. Then, the milk is cooled to 108 °F (42 °C) to bring the yogurt to the ideal growth temperature for the starter culture. Following this, the starter cultures are mixed into the cooled milk.Next, the milk is held at 108 °F (42 °C) until a pH 4. 5 is reached. This allows the fermentation to progress to form a soft gel and the characteristic flavor of yogurt. This process can take several hours. The yogurt is then cooled to 7 °C to stop the fermentation process. Fruit and flavors are added at different steps depending on the type of yogurt. Finally, the yogurt is pumped from the fermentation vat and packaged as desired. Primary Source: â€Å"Yogurt Production. † Milk Facts. Cornell University, n. d. Web. 8 Oct 2012.

Art Education For Public Schools Persuasive Slice

Outline: Art Education for Public Schools Persuasive Slice Brain experimentation confirmation is one of the several proofs education as well as commitment in fine arts is constructive for a child s educational process. Beginning from an improved clarity and creativity in being able create ideas to increased awareness in mind, body, voice, arts education has had a tremendous impact. In its several ways, it supports the advancement of the whole child along with preparation of a life filled with opportunities for learning and delight. Art education is sadly interpreted as more of a ‘luxury’ rather than a ‘must’ to a child’s education; although research has proved that simple, creative activities serve as essential building blocks for a student s future development. In addition, the fine arts provide students non-academic aid such as an increase in self-esteem, motivation, improved emotional expression and appreciation in diversity. Students cherish that their â€Å"voice† and interests are listened to and understood by others. Children gave form to their feelings through drawing and paintings. All fibers are highly important for a young mind, so why is art not a part of a student s curriculum? In these past few years, there has been big concern between educators in the relationship in arts-based learning and human development. The arts construct neural systems building a variety of profits running between fine motor skills to creativity and enhanced emotional balance. GainingShow MoreRelated Womens Liberation in the 1920s: Myth or Reality? Essay3466 Words   |  14 Pagesin the domestic sphere. Women, before 1914, sought independence through working in a profession outside the home. They considered the profession of domesticity as uneventful and simply wanted more. 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Coffee Analysis Coffee House Ethnography - 1877 Words

Coffee House Ethnography Anth-101 Winter 2017 Sijia Wang Introduction The National Coffee Association found that the average coffee consumption in the United States is 2.96 cups of coffee per day in 2016 (NCA Coffee Drinking Trends Survey, 2016). According to the report, daily consumption of espresso-based beverages has nearly tripled since 2008 (NCA Coffee Drinking Trends Survey, 2016). Therefore, people hang out mostly in coffee shops, where they can enjoy their time with a fresh coffee. Indeed, coffee shops are not only serving coffee recipes, but also give a unique space to different customers, like meeting point, living room, and remote office. A city’s coffee shop culture is also an insight into the way that city lives. A lot of†¦show more content†¦Seating is located throughout the left side of the coffee shop. This Starbucks shop mix upholstered chairs and single sofas with hard-backed chairs around tables. 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