Active object system

An active object system is a transition-based object-oriented system suitable for the design of various concurrent systems. An AOS consists of a collection of interacting objects, where the behavior of each object is determined by the transition statements provided for the class of that object. A transition statement is a condition-action pair, an equational assignment statement, or an event routine. The transition statements provided for each object can access, besides the state of that object, the states of the other objects known to it through its interlace variables. Interface variables are bound to objects when objects are instantiated so that desired connections among objects are established. The major benefit of the AOS approach is that an active system can be hierarchically composed from its active software components as if it were a hardware system.Key Words and Phrases: object-oriented concurrent programming, software IC, production system, hierarchical composition, behavioral composition

User interface system based on active objects

An active-object user interface system (AOUIS) is a user interface system implemented as an active object system (AOS). An AOS is a transition-based object-oriented system suitable for the design of various concurrent systems. In an AOUIS, user interface objects, which are sometimes called "widgets", are represented as active user interface objects (AUIOs). The behavior of an AUIO is defined by the transition rules, the equational assignment statements, and the event routines provided in its class definition. Furthermore, an AUIO can be constructed from its component AUIOs through structural composition as ifit were a hardware object. Thus, AUIOs are better encapsulated and provide more flexible communication protocols than ordinary user interface objects. In addition, declarative descriptions of multiple views can be provided for each AUIO.Key Words and Phrases : user interface management system, active object system, production system, structural composition, software IC, subject/view

Actionbase system for manufacturing control

A modern computerized manufacturing control system must manage production data, coordinate control actions, and provide user-friendly interfaces. An actionbase management system (ABMS) is a general software system that facilitates implementations of actionbase systems that provide these capabilities for different applications. Besides an ordinary data management facility, our ABMS includes action control and user interface subsystems implemented as active object systems (AOSs). An AOS is a transition-based object-oriented system suitable for the design of various concurrent systems. The behavior of each active object is defined by the transition rules, the equational assignment statements, and the event routines provided in its class definition. An active object can be constructed from its component active objects through structural composition as if it were a hardware object. The user interface management subsystem of the ABMS allows us to provide declarative descriptions of views for active objects. These views provide user interfaces for an actionbase system.Key Words and Phrases: manufacturing control, flexible manufacturing system, actionbase system, active-object system, software IC, object-oriented concurrent system, graphical user interface, active-object user interface

Object-oriented Modular Expert System Shell

Computer Scienc

Polar Cousins

Geopolitics and climate change now have immediate consequences for national and international security interests across the Arctic and Antarctic. The world’s polar regions are contested and strategically central to geopolitical rivalry. At the same time, rapid political, social, and environmental change presents unprecedented challenges for governance, environmental protection, and maritime operations in the regions. With chapters that raise awareness, address challenges, and inform policy options, Polar Cousins reviews the state of strategic thinking and options on Antarctica and the Southern Oceans in light of experience in the circumpolar North. Prioritizing strategic issues, it provides an essential discussion of geostrategic thinking, strategic policy, and strategy development. Featuring contributions from international defence experts, scientists, academics, policymakers, and decisionmakers, Polar Cousins offers key insights into the challenges unique to the polar regions

Virtually There: A Phenomenological Study of Secondary Students and Their Engagement with Virtual Reality Field Trips

The study seeks to inform solution to the lack of student exposure to frequent, culturally enriching field trips in school. To address the concern of limited learning through school field trips, this phenomenological study seeks to explore the lived experiences of virtual reality field trips for secondary students. The study seeks to examine how students respond emotionally, physically, and cognitively to the use of virtual reality within the classroom. Data analysis consists of observing, interviewing, and assessing students as they engage in and complete a virtual reality field trip. The three research domains are transcribed and analyzed to better understand how students respond in a virtual field trip. The results will lead to further studies on the use of virtual reality field trips as a teaching strategy to improve student learning

Polar Cousins

Geopolitics and climate change now have immediate consequences for national and international security interests across the Arctic and Antarctic. The world’s polar regions are contested and strategically central to geopolitical rivalry. At the same time, rapid political, social, and environmental change presents unprecedented challenges for governance, environmental protection, and maritime operations in the regions. With chapters that raise awareness, address challenges, and inform policy options, Polar Cousins reviews the state of strategic thinking and options on Antarctica and the Southern Oceans in light of experience in the circumpolar North. Prioritizing strategic issues, it provides an essential discussion of geostrategic thinking, strategic policy, and strategy development. Featuring contributions from international defence experts, scientists, academics, policymakers, and decisionmakers, Polar Cousins offers key insights into the challenges unique to the polar regions

A Run-time environment for an object-oriented database management system

Ankara : The Department of Computer Engineering and Information Sciences and the Institute of Engineering and Sciences of Bilkent Univ. , 1989.Thesis (Master's) -- Bilkent University, 1989.Includes bibliographical references leaves 97-100.In this thesis, an object-oriented query processor, a database language executer, and the protocols for the system- defined classes are designed and implemented. The designed and implemented database language completely fulfills the requirements of the object-oriented paradigm. Query processing functions are implemented through the message passing paradigm, which results in a uniform treatment of data manipulation and query processing functions. The run-time environment also supports the implementation of inheritance mechanism, class hierarchy maintenance, instance access and modification, and access to class definitions.Yengül, CanM.S