Search results for "computing"
showing 10 items of 25279 documents
Cell state prediction through distributed estimation of transmit power
2019
Determining the state of each cell, for instance, cell outages, in a densely deployed cellular network is a difficult problem. Several prior studies have used minimization of drive test (MDT) reports to detect cell outages. In this paper, we propose a two step process. First, using the MDT reports, we estimate the serving base station’s transmit power for each user. Second, we learn summary statistics of estimated transmit power for various networks states and use these to classify the network state on test data. Our approach is able to achieve an accuracy of 96% on an NS-3 simulation dataset. Decision tree, random forest and SVM classifiers were able to achieve a classification accuracy of…
Optimizing Query Perturbations to Enhance Shape Retrieval
2020
3D Shape retrieval algorithms use shape descriptors to identify shapes in a database that are the most similar to a given key shape, called the query. Many shape descriptors are known but none is perfect. Therefore, the common approach in building 3D Shape retrieval tools is to combine several descriptors with some fusion rule. This article proposes an orthogonal approach. The query is improved with a Genetic Algorithm. The latter makes evolve a population of perturbed copies of the query, called clones. The best clone is the closest to its closest shapes in the database, for a given shape descriptor. Experimental results show that improving the query also improves the precision and complet…
A Hybrid Architecture for Tiered Storage with Fuzzy Logic and AutoML
2020
The explosion of storage needs pauses a multifaceted challenge for organizations, not only it exerts a large pressure on precious resources, but also creates a sub-optimal data environment where the noise level may overwhelm the actual signal. However, despite the economies of scale achieved by major cloud platforms, the fundamental issue of storage optimization did not go away.
An Efficient Cooperative Smearing Technique for Degraded Historical Documents Images Segmentation
2020
Segmentation is one of the critical steps in historical document image analysis systems that determines the quality of the search, understanding, recognition and interpretation processes. It allows isolating the objects to be considered and separating the regions of interest (paragraphs, lines, words and characters) from other entities (figures, graphs, tables, etc.). This stage follows the thresholding, which aims to improve the quality of the document and to extract its background from its foreground, also for detecting and correcting the skew that leads to redress the document. Here, a hybrid method is proposed in order to locate words and characters in both handwritten and printed docu…
Identity-Agency in Progress: Teachers Authoring Their Identities
2018
Teachers’ professional identities have been widely recognized as the key resource through which teachers make sense of their work. Despite this recognition, few studies have offered a longitudinal perspective on the processes involved in teachers’ identity development. In this chapter I will offer an advanced conceptualization of the ways in which teachers author their identity development processes. I use examples from two longitudinal research projects on pre-service and in-service teachers’ identity development to illustrate the teachers’ efforts to maintain and develop their professional identities, and identifies two agentic dynamics in professional identity development: renegotiation …
Using English as the Language of Science
2021
This article presents the development and testing of a content-based video exchange model as a motivating means to introduce lower secondary English learners to English as the language of science. The central goal was that students reach the required curricular content knowledge despite learning some of the content in a foreign language. The model was tested in German seventh-grade classes (n = 133), in which the students communicated with U.S. eighth-graders on the topic of ecology. Following field trips to a forest and a desert ecosystem, students presented and compared biotic and abiotic data in videos. The German students’ content knowledge and their motivation were assessed in a pretes…
Assessing the Level of Collaborative Writing in a Wiki-Based Environment: A Case Study in Teacher Education
2016
Wikis have received the last few years a growing interest as tools for supporting collaborative writing in teacher education. This paper reports on results from a case study that aimed at assessing the level of collaborative writing among teacher students. Taking advantages of wiki affordances, the proposed theoretical framework uses a taxonomy of category actions that can be carried out on wiki. These provide a powerful instrument to analyze students’ individual contributions to the wiki and level of collaborative writing among students as well. Implications for teacher preparation and professional development are drawn from the results and future research actions are envisaged to enhance …
The moral work of becoming a professional
2021
Abstract In contemporary working life, art-based initiatives are increasingly used in organizational training and development. For artists, this has created new employment opportunities as creative entrepreneurs who provide specialist services for workplaces. In this article, we study the dynamics of such encounters through the narrated accounts of training professionals. Our data come from a professional mentoring program where the working pairs of artists and consultants shared stories about their customer projects. By using conversation analysis as a method, we analyze the way stories are interactionally accomplished in peer group sessions of the program. In particular, we analyze how pa…
Impacts of Educational Technologies on Learning Engagement – A Case of Latvian and Thai's Learners
2019
Massive open online courses (MOOCs) have changed the traditional approach to the teaching process in higher education, so it is important to observe how learning takes place in that technology-rich environment. Cognitive, social, and emotional engagement as part of the MOOCs learning context is a basic principle that prescribes the relationships and interactions between the teacher, student, and learning setting. Each of these components has multiple features and is related to the complex nature of learning and teaching. The qualitative exploratory research design as a case study was conducted with educators and students from two countries – Latvia and Thailand. They were involved in learni…
Multimodal mediational means in assessment of processes: an argument for a hard-CLIL approach
2020
In Japan, CLIL instruction falls under a soft-CLIL approach, content serving as secondary to language instruction. Furthermore, assessment in classrooms in Japan is oftentimes limited to assessing ...