Holub on Patterns. Larman, Craig Applying UML and Patterns. Liskov, Barbara ; Guttag, John Pattern Languages of Program Design 5.
Log in to Wiley Online Library
Marinescu, Floyd Pattern Languages of Program Design 3. Patterns for Parallel Programming. Shalloway, Alan; Trott, James R. Vlissides, John M. Pattern Hatching: Design Patterns Applied. Weir, Charles; Noble, James Small Memory Software: Patterns for systems with limited memory. Software design patterns. Design Patterns Enterprise Integration Patterns. Categories : Software design patterns Software development.
Hidden categories: All articles with unsourced statements Articles with unsourced statements from August Copied and pasted articles and sections from August All copied and pasted articles and sections Wikipedia articles with GND identifiers Wikipedia articles with LCCN identifiers. Namespaces Article Talk. Views Read Edit View history. In other projects Wikimedia Commons Wikibooks.
Software design pattern
Tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed. This pattern appears in the GoF catalog as "virtual proxy", an implementation strategy for the Proxy pattern. PoEAA . Avoid expensive acquisition and release of resources by recycling objects that are no longer in use. Can be considered a generalisation of connection pool and thread pool patterns.
Specify the kinds of objects to create using a prototypical instance, and create new objects from the 'skeleton' of an existing object, thus boosting performance and keeping memory footprints to a minimum. Resource acquisition is initialization RAII. Convert the interface of a class into another interface clients expect. An adapter lets classes work together that could not otherwise because of incompatible interfaces.
The enterprise integration pattern equivalent is the translator. Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly. Attach additional responsibilities to an object dynamically keeping the same interface. Decorators provide a flexible alternative to subclassing for extending functionality. Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use.
The pattern relates to the design of Web applications. It provides a centralized entry point for handling requests. Effective Java . Group several related elements, such as classes, singletons, methods, globally used, into a single conceptual entity.
Twin . Twin allows modeling of multiple inheritance in programming languages that do not support this feature. Artificial intelligence pattern for combining disparate sources of data see blackboard system. Chain of responsibility. Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request.
Chain the receiving objects and pass the request along the chain until an object handles it. Encapsulate a request as an object, thereby allowing for the parameterization of clients with different requests, and the queuing or logging of requests. It also allows for the support of undoable operations. Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language.
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it allows their interaction to vary independently. Without violating encapsulation, capture and externalize an object's internal state allowing the object to be restored to this state later.
- The Body Sculpting Bible for Men, Third Edition: The Ultimate Mens Body Sculpting and Bodybuilding Guide Featuring the Best Weight Training Workouts & ... Plans Guaranteed to Gain Muscle & Burn Fat!
- Turnitin: Academic Integrity at $2 per Student?
- Navigation menu.
- Christmas Carols Songbook (Ukulele Chord Songbook)?
- A Guide to the Deities of the Tantra (Meeting the Buddhas).
Null object. Define a one-to-many dependency between objects where a state change in one object results in all its dependents being notified and updated automatically. Define common functionality for a group of classes. The servant pattern is also frequently called helper class or utility class implementation for a given set of classes.
The helper classes generally have no objects hence they have all static methods that act upon different kinds of class objects. Recombinable business logic in a Boolean fashion. Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.
Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure. Represent an operation to be performed on the elements of an object structure. Visitor lets a new operation be defined without changing the classes of the elements on which it operates.
Closing the Achievement Gap
Decouples method execution from method invocation that reside in their own thread of control. The goal is to introduce concurrency, by using asynchronous method invocation and a scheduler for handling requests. Binding properties. Combining multiple observers to force properties in different objects to be synchronized or coordinated in some way. The same calculation many times in parallel, differing by integer parameters used with non-branching pointer math into shared arrays, such as GPU -optimized Matrix multiplication or Convolutional neural network.
Double-checked locking. Reduce the overhead of acquiring a lock by first testing the locking criterion the 'lock hint' in an unsafe manner; only if that succeeds does the actual locking logic proceed. Event-based asynchronous. Addresses problems with the asynchronous pattern that occur in multithreaded programs. Manages operations that require both a lock to be acquired and a precondition to be satisfied before the operation can be executed.
Join-pattern provides a way to write concurrent, parallel and distributed programs by message passing. Compared to the use of threads and locks, this is a high-level programming model. One thread puts a "lock" on a resource, preventing other threads from accessing or modifying it.
An object whose methods are subject to mutual exclusion , thus preventing multiple objects from erroneously trying to use it at the same time. A reactor object provides an asynchronous interface to resources that must be handled synchronously. Read-write lock. Thread pool. A number of threads are created to perform a number of tasks, which are usually organized in a queue.
This means that, not only do I surrender the license to use my work in perpetuity to this plagiarism detection service, but Turnitin sells my work back to you. Please stop using Turnitin at our institution. Choose instead to keep academic integrity a human problem with human solutions. Or, at the very least, allow me to individually opt out. Should I ever unintentionally plagiarize, I would rather have the opportunity to speak with my instructor about my mistake than receive a machine-generated report. Please put teaching back in the hands of teachers, where it belongs. Thank you for your support.
He is interested in the practice of critical digital pedagogy as a social justice movement and has been working in and around digital learning environments for 17 years. He learns, teaches, and theorizes from a contemplative perspective, and believes that care, listening, and attention are key to sound pedagogy. His personal website can be found at seanmichaelmorris.
He is a fan of one word sentences. Add to the Conversation 18 Responses Brilliant article. I would also add that TII encourages faculty to design essay based assessments and effectively discourages them from designing authentic assessments that are difficult to plagiarise. In short, this is an administration-facing article admittedly a very dated one that is written toward potentially agency-less instructors.
Agreed that many of the points here about Turnitin are dated. Sean and I have been making many of these points since at least or earlier. Which makes the issues here pretty evergreen in my view. Technologists that help implement it. Teachers that require their students to submit. Students that comply. What we can do more effectively, and what this piece is really about, is evaluate other tech more thoroughly before we adopt it en masse. I advise academics about this every time I show them how to use the tool and I include it in all support material that I create.
My, admittedly limited, legal understanding of the boilerplate licensing conditions for uploaded work is something that has to be used on any site that files are uploaded to to authorise them to have possession of the files. Maybe they have students in the class, maybe they are equipping students with the skills to perform particular writing tasks and most likely they have never actually learnt how to teach better, their own studies involved essays and their primary research outputs journal articles are essentially still just big essays.
When you only think you have a hammer…. Making the argument that tools like this — and they are just tools — creates an environment of distrust seems to ignore this fact. I was surprised that in your description of how to do this — read other opinions beyond the company website — you seemed to leave out test the tool for yourself.
No idea how to deal with that. I think we can apply the same principles to publishers. All of higher education is profiteering of some sort. Note that, in the parenthetical, it explicitly excludes student papers submitted to the site from their license. They are not claiming to be able to use student papers for anything other than plagiarism detection. Hi Matt, Thank you for your comment. Regardless, the thrust of our argument remains stable: that Turnitin profits from the work of students and teachers. A significant portion of the database they sell to universities, colleges, K schools, and teachers consists of the written work of students.
The discussion of academic integrity and plagiarism is an ongoing, nuanced one. Ownership and authorship are contested ideas. Turnitin erases that nuance in favor of a business model driven and sustained by student labor. I think Matt is also making a constructive distinction between two versions of the argument.
A Guide for Resisting Edtech: the Case against Turnitin | Hybrid Pedagogy
I really like your rubric for evaluating edtech. Hi, Sarah. Thanks for your interest. Great article, thank you very much for it! It brings up the issue of intellectual property and using Ed-tech in education. The most performative and accurate was the last one. However, there was an option of choosing whether we want it to save our doc as its database or not. It makes users feel secure about their works and not participating in the wilful marketing strategy behind their backs.
Thank you also for creating a letter we students can use to address this issue with our educational institution. Why are some professors at Saint Leo University using Turnitin? Turnitin is a deeply flawed plagiarism detection system PDS. Also, at Saint Leo University, we the students pledge to abide by the honor code of the University. However, Saint Leo's decision to use Turnitin, undercuts students opportunity to live by that code of honor.
Instead of an atmosphere of trust being the basis of the University and student relationship, when Turnitin is used, the atmosphere becomes toxic and filled with implied guilt. Using Turnitin says to the students, you can't be trusted. On the Department of English webpage they state; "The use of such a service for student writers begins with a presumption of guilt. Students are trustworthy, until proven otherwise. So why must all Saint Leo University students suffer under the oppression of Turnitin because of those rare few who willfully cheat?
Why would Saint Leo University purposely undermine all students opportunity to establish and build trust with faculty and the school? Cost to the University. As of the Spring of , Saint Leo University had over 16, students. Where does the money come from to pay these fees? Students know a cost to a university always ends up translating into cost to the student. Why are Universities not using other software some of which are free instead of Turnitin?
Some are even currently free. Dustball is a company that offers their services at a cost that is less than a fourth the cost of Turnitin. He states PlagTracker. The University of Louisville's English Department is a great example. The University of Louisville's Department of English webpage, says "The Composition Committee's decision not to use such software in writing courses is based on several factors:. We regard the use of teaching of writing with research, including citation practices as a rhetorical act.
The use of such a service for student writers begins from a presumption of guilt.
Chapter 2. Diverse Teaching Strategies for Diverse Learners
The best deterrents to plagiarism are well designed writing assignments that are distinctive to course material and involve effective writing pedagogy. The result of plagiarism detection software makes no distinction between plagiarism as a form of cheating and students who are making mistakes in working with unfamiliar conventions of academic writing. The University of Louisville is spot on in this matter. Morris and Stommel wrote an insightful online article detailing the hypocrisy and toxicity of plagiarism detection software.
Let us not however follow other institutions, let us adhere to our core values. Let us seek to do not what is expedient but what is right. Let us be clear, Saint Leo University was created for a noble purpose, and to that noble end it must free itself from half measures suited up as innocent and good, but underneath that guise a wolf lurks in our midst. Saint Leo is founded on much deeper principles than that. Therefore, I ask for the educational leaders of Saint Leo University, for the sake of all present and future students, and for the sake of the core value of integrity that Saint Leo University stands for; say no to all toxic and destructive anti-plagiarism software.
Let us put aside all half measures of PDS and rally to the noble ideal of integrity. Morris, S. Profitt, B. Saint Leo University Core Values. University of Louisville n. Your article inspired me to really ponder Turnitin and PDS in general. I wonder if this, plus the fact that so many have complained about the unethical use of student work, have prompted a change. I loathe Turnitin. Thank for articulating WHY I refuse to use it.
Notify me of follow-up comments by email. Notify me of new posts by email. Random Article. The Purpose of Online Discussion. Higher Education as Bulwark of Uselessness. Interactive Criticism and the Embodied Digital Humanities. What is the name of the company, the CEO? What are their politics? What does the tool say it does? What does it actually do?
What data are we required to provide in order to use the tool login, e-mail, birthdate, etc. What flexibility do we have to be anonymous, or to protect our data? Where is data housed; who owns the data? What are the implications for in-class use? How does this tool act or not act as a mediator for our pedagogies? Does the tool attempt to dictate our pedagogies? How is its design pedagogical? Or exactly not pedagogical? Sean sees these kinds of literacies as a vital component of teaching and learning in digital spaces : What lies at the heart of these literacies also forms the primary concern of critical digital pedagogy: that is, agency.
Rebecca Moore Howard writes that Many of our colleagues are entrenched in an agonistic stance toward students in the aggregate: students are lazy, illiterate, anti-intellectual cheaters who must prove their worth to the instructor. Resisting Turnitin How does a student push back against the flood of a tool like Turnitin, especially when that tool has been adopted across an institution? Sincerely, [Name]. About the Authors.
Related Writing Patterns - software, organizational, pedagogical
Copyright 2019 - All Right Reserved