Search results for "IDEF"

Esteettisen teorian esteettinen teoria: Theodor Adornon dialektinen estetiikka

2012

Theodor W. Adornon (1903–1969) Esteettinen teoria ei ole teoria estetiikasta vaan pikemminkin teoria esteettisen kritiikin ehdoista ja mahdollisuuksista. Teoksen tavoitteena on asetella kysymys taiteen ja yhteiskunnan suhteesta alistamatta taidetta millekään ulkoiselle päämäärälle, mutta samalla typistämättä sitä vain itseensä viittaavaksi peliksi. Tavoite heijastelee Adornon filosofian tärkeää pyrkimystä säilyttää kohteen ensisijaisuus: tutkimuksen kohdetta ei tule pakottaa ennalta annettuun muottiin, vaan teorian on säilytettävä jatkuva itsereflektiivinen liike kohteen ja metodin välillä. peerReviewed

Relay selection in FDD amplify-and-forward cooperative networks

2017

In this paper, the problems of relay selection and distributed beamforming are investigated for bi-directional dual-hop amplify-and-forward frequency-division duplex cooperative wireless networks. When using individual per-relay maximum transmission power constraint, it has been proven that the relay selection and beamforming optimization problem becomes NP hard and requires exhaustive search to find the optimal solution. Therefore, we propose a computationally affordable sub-optimal multiple relay selection and beamforming optimization scheme based on the l1 norm squared relaxation. The proposed scheme performs the selection for the two transmission directions, simultaneously, while aiming…

Skulls, Tree Bark, Fossils

2021

AbstractStudies of material objects in the field of memory studies have followed diverse epistemological and disciplinary trajectories, but their shared characteristic has been the questioning of philosophical assumptions concerning human relations with inanimate things and lower-level organic objects, such as plants, within the Aristotelian hierarchy of beings. Rather than accept at face value their categorizations as passive or deficient in comparison to the human subject, critical scholarship has reformulated the place and role of nonhuman entities in culture. This essay examines the nexus of materiality and memory in the work of the French philosopher and art historian Georges Didi-Hube…

Random Interruptions in Cooperation for Spectrum Sensing in Cognitive Radio Networks

2015

In this paper, a new cooperation structure for spectrum sensing in cognitive radio networks is proposed which outperforms the existing commonly-used ones in terms of energy efficiency. The efficiency is achieved in the proposed design by introducing random interruptions in the cooperation process between the sensing nodes and the fusion center, along with a compensation process at the fusion center. Regarding the hypothesis testing problem concerned, first, the proposed system behavior is thoroughly analyzed and its associated likelihood-ratio test (LRT) is provided. Next, based on a general linear fusion rule, statistics of the global test summary are derived and the sensing quality is cha…

From Databases to Ontologies

2009

This chapter introduces the UML profile for OWL as an essential instrument for bridging the gap between the legacy relational databases and OWL ontologies. We address one of the long-standing relational database design problems where initial conceptual model (a semantically clear domain conceptualization ontology) gets “lost” during conversion into the normalized database schema. The problem is that such “loss” makes database inaccessible for direct query by domain experts familiar with the conceptual model only. This problem can be avoided by exporting the database into RDF according to the original conceptual model (OWL ontology) and formulating semantically clear queries in SPARQL over t…

A Design Theory for Secure Information Systems Design Methods

2006

Many alternative methods for designing secure information systems (SIS) have been proposed to ensure system security. However, within all the literature on SIS methods, there exists little theoretically grounded work that addresses the fundamental requirements and goals of SIS design. This paper first uses design theory to develop a SIS design theory framework that defines six requirements for SIS design methods, and second, shows how known SIS design methods fail to satisfy these requirements. Third, the paper describes a SIS design method that does address these requirements and reports two empirical studies that demonstrate the validity of the proposed framework. peerReviewed

Model independent assertions for integration of heterogeneous schemas

1992

Due to the proliferation of database applications, the integration of existing databases into a distributed or federated system is one of the major challenges in responding to enterprises' information requirements. Some proposed integration techniques aim at providing database administrators (DBAs) with a view definition language they can use to build the desired integrated schema. These techniques leave to the DBA the responsibility of appropriately restructuring schema elements from existing local schemas and of solving inter-schema conflicts. This paper investigates the assertion-based approach, in which the DBA's action is limited to pointing out corresponding elements in the schemas an…

Applications of Ontologies in Knowledge Management Systems

2014

Abstract Enterprises are realizing that their core asset in 21st century is knowledge. In an organization knowledge resides in databases, knowledge bases, filing cabinets and peoples' head. Organizational knowledge is distributed in nature and its poor management causes repetition of activities across the enterprise. To get true benefits from this asset, it is important for an organization to “know what they know”. That’s why many organizations are investing a lot in managing their knowledge. Artificial intelligence techniques have a huge contribution in organizational knowledge management. In this article we are reviewing the applications of ontologies in knowledge management realm

Pelillinen mimesis muovaa subjektiutta

2019

Tanssit peltotiellä

2018

Martin Heidegger kirjoitti vuosina 1944–1945 tekstin Silleen jättämisen pohdiskelusta: Peltotiekeskustelu ajattelusta, ja tästä koreografi Veli Lehtovaaran tanssiteos Peltotiekeskustelu on saanut inspiraationsa. Lehtovaaran tarkoituksena on esittää erilaisia ajattelun muotoja ja luoda tanssin keinoin Heideggerin alkuperäistekstin mukainen kolmen henkilön välinen keskustelu. nonPeerReviewed