Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | ACM Digital Library |
|---|---|
| Author | Ehrich, Hans-Dieter |
| Abstract | Object-oriented approaches to designing information systems suggest to distinguish between intra- and inter-object aspects. While intra-object design and verification tools are being used on a large scale, inter-object techniques are not yet well established. There are a variety of approaches addressing the concurrency and communication aspects of multi-object systems, but fundamental problems remain.The TROLL object specification language project aims at providing logic-based formal semantics to intra- and inter-object aspects, among others. For the former, a conventional temporal logic was employed. For the latter, an extension called multi-object logic was developed. It has proven useful for semantics descriptions, recently also for a mobile-agent extension where the innovative contribution was to distinguish between the ever-mobile units and those which provide fixed subsystems as contexts for the mobile entities.While being developed for giving semantics, multi-object logics showed surprising potential for verification. Conventionally, intra-object verification techniques are applied to inter-object verification by building a global state space. This state space, however, grows exponentially with the number of objects in the system. In spite of sophisticated techniques which have been developed to overcome this 'state-space explosion' problem, there is a notorious complexity barrier. It is not feasible to verify large systems this way.In the multi-object logic approach, the construction of the global state space - or any fraction or abstraction thereof - is avoided. So it has the potential to handle large systems. The method is applicable in cases where the objects and interaction patterns in a system are known beforehand, when writing the global conditions to be checked. Although these conditions are bound to objects, they are 'global' in the sense that they may refer to the states of other objects at interaction points.This way, conditions concerning interacting objects may be written in a still basically sequential logic, although multiple objects are assumed to behave concurrently. Global checking conditions may then be automatically and equivalently split into local conditions for the objects involved, plus interaction requirements for these objects. All these conditions and requirements can be checked locally, one after the other, where only the objects involved in the condition have to be taken into account.While we are working on the potential of the approach for software engineering, it may have potential beyond: we are also working on a project to simulate and analyze biological processes using object-oriented techniques. For instance, model checking can be used to find possible scenarios leading to biological cell states of interest. Applying the multi-object approach here is a challenging problem. |
| Starting Page | 1 |
| Ending Page | 1 |
| Page Count | 1 |
| File Format | |
| ISSN | 01635948 |
| DOI | 10.1145/1082983.1083184 |
| Journal | ACM SIGSOFT Software Engineering Notes (SOEN) |
| Volume Number | 30 |
| Issue Number | 4 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1979-04-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|