Search results for "Data warehouse"
showing 10 items of 332 documents
On Metadata Support for Integrating Evolving Heterogeneous Data Sources
2019
With the emergence of big data technologies, the problem of structure evolution of integrated heterogeneous data sources has become extremely topical due to dynamic and diverse nature of big data. To solve the big data evolution problem, we propose an architecture that allows to store and process structured and unstructured data at different levels of detail, analyze them using OLAP capabilities and semi-automatically manage changes in requirements and data expansion. In this paper, we concentrate on the metadata essential for the operation of the proposed architecture. We propose a metadata model to describe schemata and supplementary properties of data sets extracted from sources and tran…
Sensor Network to Measure Electric Parameters
2010
Present paper covers the design of a sensor network to measure electric parameters taking into consideration that all needed components are available in the market as commercial products. The work is oriented to the integration of these existing devices and to give extra functionalities. The final functionality and the connection among the used components are provided by the software. The present paper gives special consideration to the software structure. The described system becomes a tool to be used for energy efficiency applications
Testing a hierarchical and integrated model of quality in the service sector: functional, relational, and tangible dimensions
2009
Prior research has revealed limitations of the dominant SERVQUAL model of service quality. Some authors have pointed out the SERVQUAL model somewhat neglects the tangible and relational facets of quality in the service sector, and, therefore, there is a need to obtain a comprehensive and adaptable structure of quality for different types of services. Consequently, we propose and test a hierarchical and integrated model of service quality, hypothesising the existence of three second-order dimensions: functional quality (describing the efficiency with which the service core is provided); tangibles (the quality of physical service environment); and relational quality (relational or emotional b…
Wartość informacji w systemie informacyjnym w ocenie jej jakości
2018
The purpose of the article is to determine to what extent and how to evaluate the value of information available in the information system when assessing its quality. Such an evaluation, especially for systems operating on the Internet, is absolutely necessary because of the constant and rapid growth of the information resources available there, bearing the unnecessary economic costs of their poor quality and related to that negative social phenomena. The quality of information is a multidimensional category and requires evaluation of great number of different attributes. Are there among conceptual models for evaluating the quality of information also such that require evaluating the value …
How social, environmental, and economic CSR affects consumer-perceived value: Does perceived consumer effectiveness make a difference?
2018
This study analyzes the influence of consumer‐perceived dimensions of corporate social responsibility (CSR) from a sustainable development approach (i.e. economic, social, and environmental) on the dimensions of perceived value (i.e. utilitarian, emotional, and social value). The study also analyzes the moderating effect of perceived consumer effectiveness (PCE) in the value generation process around CSR. A theoretical model is estimated with data from 661 consumers of Inditex or Danone products, leading firms in the textile and dairy sectors, respectively. Results indicate that functional value is determined by economic and social dimensions of CSR. Emotional value can be enhanced through …
Governing the Metropolitan Dimension: A Critical Perspective on Institutional Reshaping and Planning Innovation in Italy
2019
As in other European countries, over recent decades the question of metropolitan government has captured political and academic attention in Italy too. The debate has been recently fuelled by a national reform introduced to create 14 metropolitan authorities to provide for new government solutions in the territories of the larger urban areas. Based on literature and empirical observation, this paper presents a critical view of that process by examining the following questions: How do metropolitan areas relate to broader Italian urban policy? How does the reform contribute to a reshaping of multi-level governance through national and local initiatives? And how does institutional reorganisati…
Fragtique: Applying an OO Database Distribution Strategy to Data Warehouse
2001
We propose a strategy for distribution of a relational data warehouse organized according to a star schema. We adapt fragmentation and allocation strategies that were developed for OO databases. We split the most-often-accessed dimension table into fragments by using primary horizontal fragmentation. The derived fragmentation then divides the fact table into fragments. Other dimension tables are not fragmented since they are presumed to be sufficiently small. Allocation of fragments encompasses duplication of non-fragmented dimension tables that we call a closure.
Leadership ethical dimension: a requirement in TQM implementation
2002
Deals with theoretical arguments that justify why the leadership of managers and its ethical dimension is a powerful enabler for TQM efforts to sustain, together with a systematic management. Starts by setting out a multidimensional conception of leadership in which the ethical sphere is explicitly considered. The principles articulating TQM are then analysed, studying the role of leadership and its ethical dimension, in their implementation. Concludes with five propositions, stating that the explicit consideration of leadership’s ethical dimension is required in order to achieve a complete, deep and sustained deployment of TQM principles. Draws implications for managers and researchers.
The Qualitative Researcher in the Quality of Life Field
2015
In the current society, there is a plurality of perspectives about the knowledge of the world and in that stage there is an expansion of the use of qualitative methods as expression of the contemporary interest in the subject-matters, considering the epistemological relevance acquired by the introduction of the subject’s word as a possibility to construct knowledge. The qualitative researcher is expected to feel personally involved in every step of the research process, because every consideration and decision will have to be based on entirely personal grounds. Thus, in this chapter, we shall look into the importance of the qualitative researcher’s leading role in each phase of the research…
Five types of OECD healthcare systems: Empirical results of a deductive classification
2013
This article classifies 30 OECD healthcare systems according to a deductively generated typology by Rothgang and Wendt [1]. This typology distinguishes three core dimensions of the healthcare system: regulation, financing, and service provision, and three types of actors: state, societal, and private actors. We argue that there is a hierarchical relationship between the three dimensions, led by regulation, followed by financing and finally service provision, where the superior dimension restricts the nature of the subordinate dimensions. This hierarchy rule limits the number of theoretically plausible types to ten. To test our argument, we classify 30 OECD healthcare systems, mainly using O…