Applying semantic knowledge to the automatic processing of temporal expressions and events in natural language     

Hector Llorens  Estela SaqueteBorja Navarro-Colorado 《Information processing & management》2013

This paper addresses the problem of the automatic recognition and classification of temporal expressions and events in human language. Efficacy in these tasks is crucial if the broader task of temporal information processing is to be successfully performed. We analyze whether the application of semantic knowledge to these tasks improves the performance of current approaches. We therefore present and evaluate a data-driven approach as part of a system: TIPSem. Our approach uses lexical semantics and semantic roles as additional information to extend classical approaches which are principally based on morphosyntax. The results obtained for English show that semantic knowledge aids in temporal expression and event recognition, achieving an error reduction of 59% and 21%, while in classification the contribution is limited. From the analysis of the results it may be concluded that the application of semantic knowledge leads to more general models and aids in the recognition of temporal entities that are ambiguous at shallower language analysis levels. We also discovered that lexical semantics and semantic roles have complementary advantages, and that it is useful to combine them. Finally, we carried out the same analysis for Spanish. The results obtained show comparable advantages. This supports the hypothesis that applying the proposed semantic knowledge may be useful for different languages.  相似文献   

The effectiveness of a field observation exercise to learn process management     

Naser Nikandish  Dayoung Kim  Rommel O. Salvador 《Decision Sciences Journal of Innovative Education》2023,21(2):95-106

To address the need for students to better comprehend process management concepts in an undergraduate-level operations management course, we proposed and examined the effectiveness of an experiential learning activity, the Service Process Observation Exercise (SPOE). After teaching process management topics in the form of a traditional lecture, students were offered the opportunity to observe, record, and analyze a live, functioning process and to report their findings. Analyzing exam results following the activity, we found that the students who participated in the SPOE scored 5.3% higher than students who did not participate on items measuring knowledge of process management concepts. No differences were found on items measuring the knowledge of other concepts covered in the course. These findings are robust, even after controlling for potential covariates, suggesting that the SPOE significantly improves student comprehension of concepts directly related to process management.  相似文献   

Identification of histological threshold concepts in health sciences curricula: Students' perception     

Miguel A. Martin-Piedra  Salvador Saavedra-Casado  Antonio Santisteban-Espejo  Fernando Campos  Jesus Chato-Astrain  Oscar Dario Garcia-Garcia  David Sanchez-Porras  Juan de Dios Luna del Castillo  Ismael Angel Rodriguez  Antonio Campos 《Anatomical sciences education》2023,16(1):171-182

Students' metacognitive skills and perceptions are considered important variables for high-quality learning. In this study, students' perceptions were used to identify histological threshold concepts (integrative, irreversible, transformative, and troublesome) in three health sciences curricula. A specific questionnaire was developed and validated to characterize students' perceptions of histological threshold concepts. A sample of 410 undergraduate students enrolled in the dentistry, medicine, and pharmacy degree programs participated in the study. Concepts assessed in the study were clustered to ten categories (factors) by exploratory and confirmatory factor analysis. Concepts linked to tissue organization and tissue functional states received the highest scores from students in all degree programs, suggesting that the process of learning histology requires the integration of both static concepts related to the constituent elements of tissues and dynamic concepts such as stem cells as a tissue renewal substrate, or the euplasic, proplasic and retroplasic states of tissues. The complexity of integrating static and dynamic concepts may pose a challenging barrier to the comprehension of histology. In addition, several differences were detected among the students in different degree programs. Dentistry students more often perceived morphostructural concepts as threshold concepts, whereas medical students highlighted concepts related to two-dimensional microscopic identification. Lastly, pharmacy students identified concepts related to tissue general activity as critical for the comprehension and learning of histology. The identification of threshold concepts through students' perceptions is potentially useful to improve the teaching and learning process in health sciences curricula.  相似文献   

Nordic walking practice might improve plantar pressure distribution     

Pérez-Soriano P  Llana-Belloch S  Martínez-Nova A  Morey-Klapsing G  Encarnación-Martínez A 《Research quarterly for exercise and sport》2011,82(4):593-599

Nordic walking (NW), characterized by the use of two walking poles, is becoming increasingly popular (Morgulec-Adamowicz, Marszalek, & Jagustyn, 2011). We studied walking pressure patterns of 20 experienced and 30 beginner Nordic walkers. Plantar pressures from nine foot zones were measured during trials performed at two walking speeds (preferred and 20% faster), and under two walking conditions (NW vs. normal walking). In comparison to normal walking, NW experience led to a significant (p < .05) pressure reduction of about 50% on the central metatarsals. No significant increases were detected in other foot regions. The differences between experienced and beginners during normal walking including a 40% pressure reduction on the metatarsal area, suggests that regular NW practice might also have a beneficial effect on plantar pressure when walking without poles.  相似文献   

Reserves Through Sakai: University of Dayton's Primary Tool for Electronic Reserves     

Hector Escobar Jr. 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(4):253-261

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Integrating Western and Chinese Educational Theories: A Case Study of Implementing a Quality Student Leadership (QSL) Programme in a Secondary School in Hong Kong     

Wai Ming Cheung  & Hector W. H. Tsang 《Pastoral Care in Education》2002,20(1):11-15

Secondary school students have been experiencing stress related to examination and academic performance in Hong Kong: the Special Administrative Region of the Chinese Mainland. The article reports a case study which applied the student empowerment model originated from western societies and the 'Qing' concept of Chinese philosophy to formulate a student Quality Student Leadership (QSL) programme in a secondary school. The programme aimed to reduce the stress of the students and at the same time improve their initiative, leadership, and also the relationship between the students and with the parents and teachers. The results showed that the programme was effective in achieving its objectives.  相似文献   

DEVELOPING PRE-SERVICE TEACHERS’ NOTICING OF STUDENTS’ UNDERSTANDING OF THE DERIVATIVE CONCEPT     

Gloria Sánchez-Matamoros  Ceneida Fernández  Salvador Llinares 《International Journal of Science and Mathematics Education》2015,13(6):1305-1329

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Single landmark feedback-based time optimal navigation for a differential drive robot     

Vladimir Macias  Israel Becerra  Edgar Martinez  Rafael Murrieta-Cid  Hector M. Becerrra 《Journal of The Franklin Institute》2021,358(9):4761-4792

In this paper, we propose a feedback-based control approach to execute the time optimal motion trajectories for a differential drive robot. These trajectories are composed of straight lines and rotations in place. We show that the evolution of the position of a single landmark over time, in a local reference frame, makes it possible to track a prescribed time-optimal robot’s trajectory, based on feedback of the landmark’s position. We also show that the closed-loop system is an exponentially stable one with a nonvanishing perturbation, and that globally uniformly ultimately boundedness of the tracking errors can be achieved. The two main results of this work are: 1) Our approach leverages visual servo control type of methods with tools from optimal control for executing time-optimal trajectories in the state space based on feedback information. 2) The approach is able to work with the minimum number of landmarks–only one–this represents a necessary and sufficientcondition for landmark-based navigation. Experiments in a physical robot, a nonholonomic differential drive system equipped with an omnidirectional laser sensor, are shown, which validate the proposed theoretical modelling.  相似文献   

Relationship between second grade oral reading fluency and third grade reading     

Samantha Kane Salvador  Jason Schoeneberger  Lynne Tingle 《Assessment in Education: Principles, Policy & Practice》2012,19(3):341-356

Oral reading fluency is a critical feature and outcome of early literacy instruction and it has amassed great attention as a powerful predictor of success at all levels of schooling. We examined relationships between second grade oral reading fluency scores and third grade end-of-grade reading achievement scores for students (N = 9562) in a large school district in the United States. Stakeholder interviews were also conducted. In our model, oral reading fluency and reading comprehension scores were moderately correlated; oral reading fluency was the strongest predictor of subsequent achievement, followed by ethnicity; growth on oral reading fluency was not strongly associated with end-of-grade performance; and greater than 90% of students classified as ‘at risk’ on benchmark assessments performed poorly on third grade assessments. Stakeholders believed that oral reading fluency testing was not necessary above selected levels of proficiency. We discuss implications of our findings for future research and practice.  相似文献   

Identification and description of controlled clinical trials in Spanish language dental journals          下载免费PDF全文

Julio Villanueva  Isabel Delgado  Julio R. Saldarriaga  Maria Garcia Gargallo  Yanina Amaro  Sebastián Zapata  Lorena Núñez  Gabriel Zamorano  Hector Pardo‐Hernandez  Xavier Bonfill  Conchita Martin 《Health information and libraries journal》2018,35(3):192-201

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