This document provides an introduction to concurrent programming and components. It begins by explaining why concurrent programming is important and providing a working definition of a concurrent program as one containing two or more asynchronous activities that synchronize at some point. It then defines asynchronous activities and uses this to formally define concurrency as the presence of two or more asynchronous activities. The document distinguishes between competitive and cooperative synchronization and gives examples. It concludes by defining components as special objects that coordinate between asynchronous activities and discussing some of the characteristics that must be considered when implementing components.
Enroll for Android Certification in Mumbai at Asterix Solution to develop your career in Android. Make your own android app after Android Developer Training provides under the guidance of expert Trainers. For more details, visit : http://www.asterixsolution.com/android-development-training.html
Duration - 90 hrs
Sessions - 3 per week
Applications - 50+ practise
Project - 1
Students - 15 (per batch)
Android applications define a program in terms of functionality of data. They perform tasks, display information to the screen, and act upon data from a variety of sources. Developing Android applications for mobile devices with limited resources requires a thorough understanding of the application lifecycle. Android also uses its own terminology for these application building blocks—terms such as Context, Activity and Intent. This chapter familiarizes you with the most important components of Android applications.
Deep diving into building lightning componentsCloud Analogy
In this post, we find out more about them and dig a little bit deeper. It always an added advantage if you have some extra knowledge. So let’s dive in and learn more about Lightning Components.
Enroll for Android Certification in Mumbai at Asterix Solution to develop your career in Android. Make your own android app after Android Developer Training provides under the guidance of expert Trainers. For more details, visit : http://www.asterixsolution.com/android-development-training.html
Duration - 90 hrs
Sessions - 3 per week
Applications - 50+ practise
Project - 1
Students - 15 (per batch)
Android applications define a program in terms of functionality of data. They perform tasks, display information to the screen, and act upon data from a variety of sources. Developing Android applications for mobile devices with limited resources requires a thorough understanding of the application lifecycle. Android also uses its own terminology for these application building blocks—terms such as Context, Activity and Intent. This chapter familiarizes you with the most important components of Android applications.
Deep diving into building lightning componentsCloud Analogy
In this post, we find out more about them and dig a little bit deeper. It always an added advantage if you have some extra knowledge. So let’s dive in and learn more about Lightning Components.
Objeto de conferencia
VI International Conference on Education and Information Systems, Technologies and Applications (EISTA) (Florida, Estados Unidos)
Simulation is the process of executing a model, that is a representation of a system with enough detail to describe it but not too excessive. This model has a set of entities, an internal state, a set of input variables that can be controlled and others that cannot, a list of processes that bind these input variables with the entities and one or more output values, which result from the execution of events.
Running a model is totally useless if it can not be analyzed, which means to study all interactions among input variables, model entities and their weight in the values of the output variables. In this work we consider Discrete Event Simulation, which means that the status of the system variables being simulated change in a countable set of instants, finite or countable infinite.
Existing GPSS implementations and IDE's provide a wide range of tools for analysis of the results, for generation and execution of experiments and to perform complex analysis (such as Analysis of Variance, screening and so on). This is usually enough for most common analysis, but more detailed information and much more specific analysis are often required.
In addition, teaching this kind of simulation languages is always a challenge, since the way it executes the models and the abstraction level that their entities achieve is totally different compared to general purpose programming languages, well known by most students of the area. And this is usually hard for students to understand how everything works underground.
We have developed an open source simulation framework that implements a subset of entities of GPSS language, which can be used for students to improve the understanding of these entities. This tool has also the ability to store all entities of simulations in every single simulation time, which is very useful for debugging simulations, but also for having a detailed history of all entities (permanents and temporary) in the simulations, knowing exactly how they have behaved in every simulation time.
In this paper we provide an overview of this development, making special stress on the simulation model design and on the persistence of simulation entities, which are the basis that students and researchers of the area need in order to extend the model, adapt it to their needs or add all analysis tools to the framework.
Ver registro completo en: http://sedici.unlp.edu.ar/handle/10915/5557
Architecting Single Activity Applications (With or Without Fragments)Gabor Varadi
Presentation by Gabor Varadi (@zhuinden)
What Activity and Fragment actually are in Android
What are the problems they solve, and what are their downsides
How to use a custom solution that simplifies navigation in Android applications
https://github.com/Zhuinden/navigation-example
Activities vs Fragments. Every Android developer ever who wasn’t forced to use a specific view container had to dabble with this question for a bit before choosing one. Is it better to go with an all-activity build to cut down on the number of lifecycle events I have to keep in mind and work with, or do I go with an all-fragment build to better prepare myself when I enter tablet land? Well, this presentation throws out some food for thought for the readers to help them better decide which is the better route to take of the two or, perhaps if there is a better third route that combines the best of both worlds.
Carl Gustav Hempel (1905 – 1997) posed a paradox. If we want to prove the hypotheses such as “all ravens are black,” we can look for many ravens and determine of they all meet the blackness criteria.
This presentation provides an overview of SPHERE, a web based project management system for development, emergency and conservation programs. For more info visit www.sphereworld.org or write to info@sphereworld.org.
Over the last few months one of our development teams has been working on content-driven mobile apps for multiple customers. The architecture, design and technology choices have gone through various iterations and we have learned a lot along the way. In this talk we want to share some of the experiences we have made, talk about architecture and design decisions. We will discuss some core design concepts that have proven their value, for content-driven mobile apps as well as other types of applications.
GUI Programming in JAVA (Using Netbeans) - A ReviewFernando Torres
The powerpoint provides the user with a review of various concepts of GUI programming in JAVA. It covers various concepts like :
1. What is IDE ?
2. Various Methods and Properties of Components
3. Variable declaration
4. Data types
Etc
Objeto de conferencia
VI International Conference on Education and Information Systems, Technologies and Applications (EISTA) (Florida, Estados Unidos)
Simulation is the process of executing a model, that is a representation of a system with enough detail to describe it but not too excessive. This model has a set of entities, an internal state, a set of input variables that can be controlled and others that cannot, a list of processes that bind these input variables with the entities and one or more output values, which result from the execution of events.
Running a model is totally useless if it can not be analyzed, which means to study all interactions among input variables, model entities and their weight in the values of the output variables. In this work we consider Discrete Event Simulation, which means that the status of the system variables being simulated change in a countable set of instants, finite or countable infinite.
Existing GPSS implementations and IDE's provide a wide range of tools for analysis of the results, for generation and execution of experiments and to perform complex analysis (such as Analysis of Variance, screening and so on). This is usually enough for most common analysis, but more detailed information and much more specific analysis are often required.
In addition, teaching this kind of simulation languages is always a challenge, since the way it executes the models and the abstraction level that their entities achieve is totally different compared to general purpose programming languages, well known by most students of the area. And this is usually hard for students to understand how everything works underground.
We have developed an open source simulation framework that implements a subset of entities of GPSS language, which can be used for students to improve the understanding of these entities. This tool has also the ability to store all entities of simulations in every single simulation time, which is very useful for debugging simulations, but also for having a detailed history of all entities (permanents and temporary) in the simulations, knowing exactly how they have behaved in every simulation time.
In this paper we provide an overview of this development, making special stress on the simulation model design and on the persistence of simulation entities, which are the basis that students and researchers of the area need in order to extend the model, adapt it to their needs or add all analysis tools to the framework.
Ver registro completo en: http://sedici.unlp.edu.ar/handle/10915/5557
Architecting Single Activity Applications (With or Without Fragments)Gabor Varadi
Presentation by Gabor Varadi (@zhuinden)
What Activity and Fragment actually are in Android
What are the problems they solve, and what are their downsides
How to use a custom solution that simplifies navigation in Android applications
https://github.com/Zhuinden/navigation-example
Activities vs Fragments. Every Android developer ever who wasn’t forced to use a specific view container had to dabble with this question for a bit before choosing one. Is it better to go with an all-activity build to cut down on the number of lifecycle events I have to keep in mind and work with, or do I go with an all-fragment build to better prepare myself when I enter tablet land? Well, this presentation throws out some food for thought for the readers to help them better decide which is the better route to take of the two or, perhaps if there is a better third route that combines the best of both worlds.
Carl Gustav Hempel (1905 – 1997) posed a paradox. If we want to prove the hypotheses such as “all ravens are black,” we can look for many ravens and determine of they all meet the blackness criteria.
This presentation provides an overview of SPHERE, a web based project management system for development, emergency and conservation programs. For more info visit www.sphereworld.org or write to info@sphereworld.org.
Over the last few months one of our development teams has been working on content-driven mobile apps for multiple customers. The architecture, design and technology choices have gone through various iterations and we have learned a lot along the way. In this talk we want to share some of the experiences we have made, talk about architecture and design decisions. We will discuss some core design concepts that have proven their value, for content-driven mobile apps as well as other types of applications.
GUI Programming in JAVA (Using Netbeans) - A ReviewFernando Torres
The powerpoint provides the user with a review of various concepts of GUI programming in JAVA. It covers various concepts like :
1. What is IDE ?
2. Various Methods and Properties of Components
3. Variable declaration
4. Data types
Etc
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. CHAPTER GOALS
Understand why concurrent programming is
important.
Give a working definition of concurrent program.
Understand the two types of synchronization and
give examples of each.
3. CHAPTER GOALS
Give a definition of the term component and
know what special problems can be encountered
when using components.
Describe several different reasons for doing
concurrent programming and how each of these
reasons leads to different design decisions and
different program implementation.
4. WHAT IS CONCURRENT PROGRAMMING ?
The purpose of this course is to help the
students understand how to create
concurrent programs with special concurrent
object, called concurrent components.
This components are used only in
concurrent programs.
5. WHAT IS CONCURRENT PROGRAMMING ?
A good definition of a concurrent program is needed
before components can be defined and methods given
for their implementation.
This chapter provides a good working definition of a
concurrent program after explaining why concurrent
programming is important concept for programmer to
know.
6. WHAT IS CONCURRENT PROGRAMMING ?
The working definition of a concurrent
program provided here will serve as a basis
for understand concurrent programming
throughout the course.
7. WHAT IS CONCURRENT PROGRAMMING ?
The definition of an asynchronous activity
leads to very simple definition of
concurrency:
Concurrency is defined as the presence of
two or more asynchronous activities.
8. ASYNCHRONOUS ACTIVITIES
Defining a concurrent program begins by
defining the basic building block of a
program which will be called an Activities.
9. ASYNCHRONOUS ACTIVITIES
An activities could be formally defined as
anything that could be done by abstract
Turing machine or as an algorithm.
10. ASYNCHRONOUS ACTIVITIES
Like a working definition , it is sufficient to
define an activity as simply a series of steps
implemented to perform a task.
Baking a pie or calculating a Fibonacci
number on a computer.
12. ASYNCHRONOUS ACTIVITIES
Activities can be broken down into
subactivities, each an activity itself.
Baking a pie could consist of making the
crust, making the filling,filling the crust with
the filling, and baking the pie.
Make Crust Make Filling Add Filling Bake a Pie
13. ASYNCHRONOUS ACTIVITIES
If the order of these activities is completely fixed,
then the ordering is called a total ordering, as
all steps in all activities are ordered.
In the case of a total orderings of events, the
next step to be taken can always be determined
by the activiity.
14. ASYNCHRONOUS ACTIVITIES
An activities for which the order of the
steps is determined by activity is called a
synchronous activity.
If the order can be changed, then the
ordering is called partial ordering.
15. ASYNCHRONOUS ACTIVITIES
If one activity must always finish before the
another begins, it posible to implement this
behavior with a synchronous activity.
A special case occurs when, for a partial
ordering, the next step is not determined by a
single activity.
17. ASYNCHRONOUS ACTIVITIES
The activity where the steps involved in
the two substaks are being executed
independently, or asynchronously, of each
other is called asynchronous activity.
18. ASYNCHRONOUS ACTIVITIES
The definition of an asynchronous activity
leads to a very simple definition of
concurrency:
Concurrency is defined as the presence of
two or more asynchronous activities.
19. ASYNCHRONOUS ACTIVITIES
When asynchronous activities are present
in a program, it is possible (but not
necesary) for the steps for the two
activities to interleave.
20. ASYNCHRONOUS ACTIVITIES
From the definition of asynchronous
activities the two activities do not have to
run at the same time; they simple have to
be able to run at the same time.
21. ASYNCHRONOUS ACTIVITIES
The problems that will be encountered in
concurrency occur not because the
activities execute at the same time but
because they can interleave their
executions.
22. ASYNCHRONOUS ACTIVITIES
If a program allows activities to
interleave, it must protect against the ill
effects of that interleaving whether it
occurs or not.
23. ASYNCHRONOUS ACTIVITIES
The importance of the improvement of
this definition of concurrency over the
definition of concurrency as a multiple
activities happening at the same time
cannot be overemphasized.
24. ASYNCHRONOUS ACTIVITIES
If a concurrent program does not actually
run two activities at the same time, but it
can do so, then action must be taken to
make sure problems do not occur.
26. ASYNCHRONOUS ACTIVITIES
Two computers running in different cities
are also asynchronous activities, so the
definition of concurrent must be further
tightened.
27. SYNCHRONIZATION OF ASYNCHRONOUS ACTIVITIES
That two or more asynchronous activities
are concurrent is good definition of
concurrency, but it is not useful definition.
28. SYNCHRONIZATION OF ASYNCHRONOUS ACTIVITIES
Sebesta R. say that, “Synchronization is
a mechanism that controls the order in
which tasks execute”.
Concepts of Programming Languages
,Addison-Wesley, Reading MA.1999
30. SYNCHRONIZATION OF ASYNCHRONOUS ACTIVITIES
Sebesta R. , define two types of
synchronization:
Competitives synchronization
Cooperative synchronization
31. COMPETITIVE AND COOPERATIVE SYNCHRONIZATION
Make Filling
Make a Crust
Cooperative
Synchronization
Add Filling Bake PieMixing
Bold
Competitive
Synchronizaation
32. CONCURRENT PROGRAMMING
Concurrent Program: A program that
contains asynchronous activities which
synchronize at one or more points or on one
or more resources during execution.
33. COMPONENTS
An interesting way to look at a
concurrent program is to think of it
as containing two types of units,
activities that act on other entities or
entities that control the interactions
of these activities.
34. COMPONENTS
If this units are objects, then in a
concurrent program all objects in the
program can be made to be either active
(asynchronous activities such as threads)
or pasive ( such as a shared resource or
an event that is used for synchronization).
35. COMPONENTS
Other types of simple, non-
concurrennt objects are used by
active and passive objects, such as
Vector or StringTokenizers, but these
are not involved in the concurrency in
the program.
36. COMPONENTS
Passive objects, which from
now on will be called
concurrent component or
simple components,are more
difficult for most students.
37. COMPONENTS
This is likely because they
provide the infraestructure for
the asynchronous activities that
executed in a concurrent
program.
38. COMPONENTS
Components in the example of
making a pie are the shared
mixing bowl and the event that
significates that the preparation
of the crust and filling is
completed.
39. COMPONENTS
The components control the
behavior of the asynchronous
activities so that they
coordinate and produce a
correct result.
40. COMPONENTS
The components sit between asynchronous
activities and are shared and used by
multiple asynchronous activities.
41. COMPONENTS
Note that not all objects that are non-active
are components.
A vector is safe to use in a multi-threaded
program, but it is not component because
even if it is used by a number of threads it is
not normally used to coordinate between
those threads.
42. COMPONENTS
Objects are added or removed from vector,
but the vector is used just to store data
elements, not to coordinate the
asynchronous activities.
43. COMPONENTS
A special type of vector called bounded
buffer is actually used to coordinate
between asynchronous activities.
44. COMPONENTS
Because components provide an
infraestructur for asynchronous activities and
coordinate between these activities, they
have a number of characteristics that must
be considered that do not exist when
implementing normal object.
45. SOME CHARACTERISTICS OF COMPONENTS
Because components coordinate between
several threads, they can not be created or
owned by a single thread; therefore, some
mechanism must be used to allow these
objects to be registered, or to register
themselves, with other objects representing
the asynchronous activities.
46. SOME CHARACTERISTICS OF COMPONENTS
Because components are used in separate
asynchronous activities and, in the extreme
case of distributing computing, on physically
different computers, some mechanism must
be implemented to allows the components
to communicate with asynchronous activities.
47. SOME CHARACTERISTICS OF COMPONENTS
Unlike objects for asynchronous activities,
which can be designed using procedural
flow, the logic in a component is generally
organized around the state of the
component when it is executed. Some
mechanism needs to be designed to
effectively implement the components to
allow them to provide this coordination.
48. SOME CHARACTERISTICS OF COMPONENTS
Some harmfull interactions, called race
conditions, can occur if the object are not
properly designed. One way to avoid race
conditions is to make all the methods in the
object synchronized and not allow an object
to give up the object’s lock while executing.
49. SOME CHARACTERISTICS OF COMPONENTS
This is called complete synchronization
and is sufficient for non component
objects such as String or a Vector;
however, components must coordinate
between several objects, and complete
synchronization is too restrictive to
effectively implement this coordination.
50. SOME CHARACTERISTICS OF COMPONENTS
A second type of harmful interaction, called a
deadlock, can result if the component is not
properly designed. Deadlock can occur in
any concurrent program when objects are
improperly handled; however, the posibility
of deadlock can actually be built into
components that are not designed properly,
even if the component is used correctly.