scholarly journals Modelling provenance in hydrologic science: a case study on streamflow forecasting

2012 ◽  
Vol 14 (4) ◽  
pp. 944-959 ◽  
Author(s):  
Yanfeng Shu ◽  
Kerry Taylor ◽  
Prasantha Hapuarachchi ◽  
Chris Peters

The web, and more recently the concept and technology of the Semantic Web, has created a wealth of new ideas and innovative tools for data management, integration and computation in an open framework and at a very large scale. One area of particular interest to the science of hydrology is the capture, representation, inference and presentation of provenance information: information that helps to explain how data were computed and how they should be interpreted. This paper is among the first to bring recent developments in the management of provenance developed for e-science and the Semantic Web to the problems of hydrology. Our main result is a formal ontological model for the representation of provenance information driven by a hydrologic case study. Along the way, we support usability, extensibility and reusability for provenance representation, relying on the concept of modelling both domain-independent and domain-specific aspects of provenance. We evaluate our model with respect to its ability to satisfy identified requirements arising from the case study on streamflow forecasting for the South Esk River catchment in Tasmania, Australia.

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Xi Lin ◽  
Hehua Zhang ◽  
Ming Gu

Component-based models are widely used for embedded systems. The models consist of components with input and output ports linked to each other. However, mismatched links or assumptions among components may cause many failures, especially for large scale models. Binding semantic knowledge into models can enable domain-specific checking and help expose modeling errors in the early stage. Ontology is known as the formalization of semantic knowledge. In this paper we propose an ontology-driven tool for static correctness checking of domain-specific errors. two kinds of important static checking, semantic type and domain-restrcted rules, are fulfilled in a unified framework. We first propose a formal way to precisely describe the checking requirements by ontology and then separately check them by a lattice-based constraint solver and a description logic reasoner. Compared with other static checking methods, the ontology-based method we proposed is model-externally configurable and thus flexible and adaptable to the changes of requirements. The case study demonstrates the effectiveness of our method.


2010 ◽  
Vol 04 (02) ◽  
pp. 239-283 ◽  
Author(s):  
ELENA SIMPERL

The ability to efficiently and effectively reuse ontologies is commonly acknowledged to play a crucial role in the large scale dissemination of ontologies and ontology-driven technology, being thus a pre-requisite for the ongoing realization of the Semantic Web. In this article, we give an account of ontology reuse from a process point of view. We present a methodology that can be utilized to systematize and monitor ontology engineering processes in scenarios reusing available ontological knowledge in the context of a particular application. Notably, and by contrast to existing approaches in this field, our aim is to provide means to overcome the poor reusability of existing resources — rather than to solve the more general issue of building new, more reusable knowledge components. To do so we investigate the impact of the application context of an ontology — in terms of tasks this ontology has been created for and will be utilized in — has on the feasibility of a reuse-oriented ontology development strategy and provide guidelines that take these aspects into account. The applicability of the methodology is demonstrated through a case study performed in collaboration with an international eRecruitment solution provider.


Heritage ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 1471-1498 ◽  
Author(s):  
Ikrom Nishanbaev ◽  
Erik Champion ◽  
David A. McMeekin

The amount of digital cultural heritage data produced by cultural heritage institutions is growing rapidly. Digital cultural heritage repositories have therefore become an efficient and effective way to disseminate and exploit digital cultural heritage data. However, many digital cultural heritage repositories worldwide share technical challenges such as data integration and interoperability among national and regional digital cultural heritage repositories. The result is dispersed and poorly-linked cultured heritage data, backed by non-standardized search interfaces, which thwart users’ attempts to contextualize information from distributed repositories. A recently introduced geospatial semantic web is being adopted by a great many new and existing digital cultural heritage repositories to overcome these challenges. However, no one has yet conducted a conceptual survey of the geospatial semantic web concepts for a cultural heritage audience. A conceptual survey of these concepts pertinent to the cultural heritage field is, therefore, needed. Such a survey equips cultural heritage professionals and practitioners with an overview of all the necessary tools, and free and open source semantic web and geospatial semantic web platforms that can be used to implement geospatial semantic web-based cultural heritage repositories. Hence, this article surveys the state-of-the-art geospatial semantic web concepts, which are pertinent to the cultural heritage field. It then proposes a framework to turn geospatial cultural heritage data into machine-readable and processable resource description framework (RDF) data to use in the geospatial semantic web, with a case study to demonstrate its applicability. Furthermore, it outlines key free and open source semantic web and geospatial semantic platforms for cultural heritage institutions. In addition, it examines leading cultural heritage projects employing the geospatial semantic web. Finally, the article discusses attributes of the geospatial semantic web that require more attention, that can result in generating new ideas and research questions for both the geospatial semantic web and cultural heritage fields.


1997 ◽  
Vol 16 (2) ◽  
pp. 136-154 ◽  
Author(s):  
Inez Rovegno ◽  
Dianna Bandhauer

This case study tells the story of an in-service elementary physical education teacher, who made a large-scale change from an activities approach to a movement approach based, initially, on “Every Child a Winner” (Rockett & Owens, 1977). Five psychological dispositions facilitated the development of the teacher’s knowledge: (a) the disposition to understand the approach accurately and deeply and to do the job right, (b) the disposition to accept that the approach was difficult to learn and to persist in seeking clarification, (c) the disposition to justify and develop a practice in keeping with a sound educational philosophy and theoretical foundations, (d) the disposition toward change and to learn and implement new ideas, and (e) the disposition to suspend judgment of new ideas. Dispositions can be important aspects of teacher thinking and can help to explain successful knowledge development and teacher change.


2012 ◽  
Vol 60 (1_suppl) ◽  
pp. 40-63 ◽  
Author(s):  
Nirmal Puwar ◽  
Sanjay Sharma

Building on the range of methods available to the roaming sociological imagination, curating sociology is concerned with instituting ‘live’ public encounters. Contending that there are practices in the history of sociology that can be considered instances of curating sociology, this article makes a case for harnessing these to inventive research processes today. The discussion in this article draws attention to recent developments in curating before excavating a selection of practices within sociology upon which we can reflexively build live methods with consideration to creative collaborations, publicness and exhibiting as research. Each of these involves a degree of mutation within the craft of sociology. By way of illustration, the final section of the article explores an in-depth case study of curating sociology for the Noise of the Past project, which involved us, as sociologists, collaborating with creative practitioners and ‘curating’ a large-scale public event.


2011 ◽  
pp. 759-773
Author(s):  
Nikos Manouselis ◽  
Kostas Kastrantas ◽  
Salvador Sanchez-Alonso ◽  
Jesús Cáceres ◽  
Hannes Ebner

The use of Semantic Web technologies in educational Web portals has been reported to facilitate users’ search, access, and retrieval of learning resources. To achieve this, a number of different architectural components and services need to be harmonically combined and implemented. This article presents how this issue is dealt with in the context of a large-scale case study. More specifically, it describes the architecture behind the Organic.Edunet Web portal that aims to provide access to a federation of repositories with learning resources on agricultural topics. The various components of the architecture are presented and the supporting technologies are explained. In addition, the article focuses on how Semantic Web technologies are being adopted, specialized, and put in practice in order to facilitate ontology-aided sharing and reusing of learning resources.


Author(s):  
Georgia Papacharalampous ◽  
Hristos Tyralis ◽  
Demetris Koutsoyiannis

Multi-step ahead streamflow forecasting is of practical interest for the operation of hydropower reservoirs. We provide generalized results on the error evolution in multi-step ahead forecasting by conducting several large-scale experiments based on simulations. We also present a multiple-case study using monthly time series of streamflow. Our findings suggest that some forecasting methods are more useful than others. However, the errors computed at each time step of a forecast horizon within a specific case study strongly depend on the case examined and can be either small or large, regardless of the forecasting method used and the time step of interest.


Author(s):  
Nikos Manouselis ◽  
Kostas Kastrantas ◽  
Salvador Sanchez-Alonso ◽  
Jesús Cáceres ◽  
Hannes Ebner ◽  
...  

The use of Semantic Web technologies in educational Web portals has been reported to facilitate users’ search, access, and retrieval of learning resources. To achieve this, a number of different architectural components and services need to be harmonically combined and implemented. This article presents how this issue is dealt with in the context of a large-scale case study. More specifically, it describes the architecture behind the Organic.Edunet Web portal that aims to provide access to a federation of repositories with learning resources on agricultural topics. The various components of the architecture are presented and the supporting technologies are explained. In addition, the article focuses on how Semantic Web technologies are being adopted, specialized, and put in practice in order to facilitate ontology-aided sharing and reusing of learning resources.


2020 ◽  
Vol 9 (06) ◽  
pp. 25085-25101
Author(s):  
Mr. Mohammad Alam Tareque ◽  
Nazrul Islam ◽  
Shuvashish Roy

In this article, we look at recent developments in the Bangladesh garment industry on the issue of efficiency and productivity. First, we were looking for new ideas. How are companies trying to improve their efficiency? Then, we were trying to see if there was a relationship between a companies’ (x) efficiency and cost-saving (a) and increased revenue (y). Of course, intuitively, we would all hypothesise that there must be some relationship between efficiency and reduction of cost of manufacturing and ultimately increased revenue. Further, we would all probably hypothesise that the slope of the function describing that relationship must be significantly higher than zero. Nevertheless, we tried to document the connection so that companies can believe it and give it more attention. Theoretical relationships are one of the weakest ways to try to persuade CEOs of the existence of anything. Show them the numbers, only then they will agree. This paper is an attempt to persuade a readymade garments manufacturing unit to increase efficiency to cut cost and increase revenue, we show that there is a direct causal relation to efficiency and revenue earnings.


1996 ◽  
Vol 5 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Chris Halpin ◽  
Barbara Herrmann ◽  
Margaret Whearty

The family described in this article provides an unusual opportunity to relate findings from genetic, histological, electrophysiological, psychophysical, and rehabilitative investigation. Although the total number evaluated is large (49), the known, living affected population is smaller (14), and these are spread from age 20 to age 59. As a result, the findings described above are those of a large-scale case study. Clearly, more data will be available through longitudinal study of the individuals documented in the course of this investigation but, given the slow nature of the progression in this disease, such studies will be undertaken after an interval of several years. The general picture presented to the audiologist who must rehabilitate these cases is that of a progressive cochlear degeneration that affects only thresholds at first, and then rapidly diminishes speech intelligibility. The expected result is that, after normal language development, the patient may accept hearing aids well, encouraged by the support of the family. Performance and satisfaction with the hearing aids is good, until the onset of the speech intelligibility loss, at which time the patient will encounter serious difficulties and may reject hearing aids as unhelpful. As the histological and electrophysiological results indicate, however, the eighth nerve remains viable, especially in the younger affected members, and success with cochlear implantation may be expected. Audiologic counseling efforts are aided by the presence of role models and support from the other affected members of the family. Speech-language pathology services were not considered important by the members of this family since their speech production developed normally and has remained very good. Self-correction of speech was supported by hearing aids and cochlear implants (Case 5’s speech production was documented in Perkell, Lane, Svirsky, & Webster, 1992). These patients received genetic counseling and, due to the high penetrance of the disease, exhibited serious concerns regarding future generations and the hope of a cure.


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