10 Matching Results

Search Results

Human concept cognition and semantic relations in the unified medical language system: A coherence analysis.

Description: There is almost a universal agreement among scholars in information retrieval (IR) research that knowledge representation needs improvement. As core component of an IR system, improvement of the knowledge representation system has so far involved manipulation of this component based on principles such as vector space, probabilistic approach, inference network, and language modeling, yet the required improvement is still far from fruition. One promising approach that is highly touted to offer a potential solution exists in the cognitive paradigm, where knowledge representation practice should involve, or start from, modeling the human conceptual system. This study based on two related cognitive theories: the theory-based approach to concept representation and the psychological theory of semantic relations, ventured to explore the connection between the human conceptual model and the knowledge representation model (represented by samples of concepts and relations from the unified medical language system, UMLS). Guided by these cognitive theories and based on related and appropriate data-analytic tools, such as nonmetric multidimensional scaling, hierarchical clustering, and content analysis, this study aimed to conduct an exploratory investigation to answer four related questions. Divided into two groups, a total of 89 research participants took part in two sets of cognitive tasks. The first group (49 participants) sorted 60 food names into categories followed by simultaneous description of the derived categories to explain the rationale for category judgment. The second group (40 participants) performed sorting 47 semantic relations (the nonhierarchical associative types) into 5 categories known a priori. Three datasets resulted as a result of the cognitive tasks: food-sorting data, relation-sorting data, and free and unstructured text of category descriptions. Using the data analytic tools mentioned, data analysis was carried out and important results and findings were obtained that offer plausible explanations to the 4 research questions. Major results include the following: (a) through discriminant ...
Date: August 2007
Creator: Assefa, Shimelis G.
Partner: UNT Libraries

Diffusion of Scientific Knowledge in Agriculture: The Case for Africa

Description: Paper discussing the diffusion of scientific knowledge on agriculture for Africa. Using exploratory research method, this paper set out to investigate existing knowledge diffusion models and their limitations, available best practices, and the potential to infuse translational research as a way to augment extension service programs in SSA agricultural practices.
Date: July 2013
Creator: Assefa, Shimelis; Alemneh, Daniel Gelaw & Rorissa, Abebe
Partner: UNT Libraries

Diffusion of Scientific Knowledge in Agriculture: The Case for Africa

Description: Article on the diffusion of scientific knowledge on agriculture for Africa. Using an exploratory research method, this article sets out to investigate existing knowledge diffusion models and their limitations, available best practices, and the potential to infuse translational research as a way to augment extension service programs in SSA agricultural practices.
Date: 2014
Creator: Assefa, Shimelis; Alemneh, Daniel Gelaw & Rorissa, Abebe
Partner: UNT Libraries

Moodle for Professional Development to Agricultural Extension Professionals in Africa: Workshop

Description: Presentation for the International Association of Agriculture Information Specialists (IAALD) World Congress. The authors discuss the Modular Object-Oriented Dynamic Learning Environment (Moodle) software package and its use for professional development to agriculture extension professionals in Africa.
Date: July 2013
Creator: Assefa, Shimelis; Alemneh, Daniel Gelaw & Rorissa, Abebe
Partner: UNT Libraries

Partnership for Enhancing Developing Countries' Capacity in Participating in Global Knowledge Production and Use

Description: Poster discussing a partnership for enhancing developing countries' capacity in participating in global knowledge production and use. This poster highlights some of the contributing factors that enhance the capacity of African institutions to play active roles in the current global knowledge economy (in terms of information and knowledge creation, access, use and reuse).
Date: July 2013
Creator: Alemneh, Daniel Gelaw; Assefa, Shimelis & Rorissa, Abebe
Partner: UNT Libraries

Open Access: The Global Scene

Description: Presentation for a panel at the 2014 Association for Information Science and Technology (ASIS&T) Annual Meeting. This panel presentation discusses global open access practices.
Date: November 3, 2014
Creator: Assefa, Shimelis; Rorissa, Abebe; Matusiak, Krystyna; Alemneh, Daniel Gelaw; Helge, Kris & Hastings, Samantha Kelly
Partner: UNT Libraries