Cross-over, thresholds, and interactions between science and technology: lessons for less-developed countries     

Américo Tristão Bernardes  Eduardo da Motta e Albuquerque 《Research Policy》2003,32(5):865-885

Presently, science is an important precondition for the economic development of less-developed countries. This paper discusses the specific roles that science has at initial stages of development, pointing to its contributions for the countries’ absorptive capability. Furthermore, this paper specifies the role of science for initiating a positive interaction with technological development, since initial stages of development and during catching up processes. For less-developed countries, neither the linear model of technology nor an “inverted linear model” would take place: a more interactive approach is necessary for development. Using statistics of patents (USPTO) and scientific papers (ISI) for 120 countries (1974, 1982, 1990, and 1998), this paper analyses some evidences on thresholds levels of scientific production to originate an interactive relationship between science and technology. These data also document that the value of this threshold seems to double from one period to another. Although this paper presents tentative results, some policy implications are discussed: scientific institutional building must be seen as a component of modern industrial policies.  相似文献   

Binary Pathfinder: An improvement to the Pathfinder algorithm     

Vicente P. Guerrero-Bote  Felipe Zapico-Alonso  María Eugenia Espinosa-Calvo  Rocío Gmez Crisstomo  Flix de Moya-Anegn 《Information processing & management》2006,42(6):1484

The Pathfinder algorithm is widely used to prune social networks. The pruning maintains the geodesic distances between nodes. It has shown itself to be very useful in the analysis of, amongst others, citations in BIS (bibliometrics, informetrics, and scientometrics). It has even been proposed for the online display of the search results in an information retrieval system. However, its great time and space complexity limits its use in real-time applications and in networks of any considerable size.The present work describes an improved algorithm with considerably reduced time and space complexity. Its lower execution costs thus increase its applicability both in real time and to large networks.  相似文献   

Portuguese science teachers' education,attitudes, and practice relative to the issue of alternative conceptions     

Manuel Sequeira  Laurinda Leite  Maria da Conceio Duarte 《科学教学研究杂志》1993,30(8):845-856

Many studies have shown that students of all school levels hold alternative conceptions that differ from the scientific conceptions transmitted by the school. These results raise some questions about the efficacy of traditional teaching and stress the need for using teaching strategies that explicitly take into account the alternative conceptions that students bring to the science classes. This issue has recently been raised and widely discussed throughout Portugal and the proposals for the new science syllabuses advise teachers to take it into account. However, the number of studies investigating both the teachers' attitudes towards this issue and the use of teaching strategies based on students' alternative conceptions is very limited. This article aims to present the results obtained from science teachers about their attitudes towards students' alternative conceptions and the use of teaching strategies based on these conceptions. The results may contribute to the planning of in-service courses.  相似文献   

Where is higher education in Francophone West Africa heading?     

João Batista Araujo e Oliveira 《Prospects》1987,17(4):503-527

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All good readers are the same,but every low-skilled reader is different: an eye-tracking study using PISA data     

Ksenija Krstić  Anđela Šoškić  Vanja Ković  Kenneth Holmqvist 《European Journal of Psychology of Education - EJPE》2018,33(3):521-541

PISA results show that a considerable number of 15-year-old pupils after 8 to 10 years of schooling have a low level of functional reading literacy, as defined in the PISA framework. While PISA results help identify the level of reading competency, they do not reveal what might be the reasons why some students fail to solve the tasks. One way to explore the difficulties students encounter while solving PISA reading tasks is to track their eye movements during reading. The main aim of this study was to explore the similarities and differences in eye movement patterns between students with high and low scores on PISA reading tasks. A sample of 92 students took part in the pre-test, which was based on PISA items, and administered to identify groups of students with high and low PISA reading scores. Based on student pre-test results, 20 students were selected for the main, eye-tracking test—10 participants with low scores and 10 with high scores. The eye-tracking test consisted of four different released PISA reading tasks, three of them continuous and one non-continuous. The continuous items were followed by one multiple-choice question each at L1, L2, and L3 levels of difficulty. The non-continuous text was followed by three multiple-choice questions (also L1–L3).Three main findings were the following: regarding saccadic amplitudes, the reading was found to be less fluent for the low-skilled group; according to the heat maps, they had difficulty finding the relevant material; and taking into account standard deviations of eye-tracking measures, the variability was found to be larger in this group. Taken together, the findings of this study show that the PISA results differentiating low- and high-scoring groups go hand in hand with insights from more fine-grained eye-tracking measurements.  相似文献   

When differences do not matter: inclusion in a Mexican primary school / Cuando las diferencias no importan: la inclusión en una escuela primaria mexicana     

Maribel Cruz-Ortiz  Cristina Jenaro-Río  Dora-Esperanza Sevilla-Santo  Silvia Cruz-Ortiz 《Cultura y Educación》2016,28(1):72-98

Studies show that disability is a cause of educational exclusion worldwide. Different countries adopt different views of the inclusion movement. Different variables seem to be associated with the success or failure of inclusion. This study takes place in a primary school located in Mexico. It aims to identify how inclusion is experienced by children with and without special needs, and the connections between inclusion and quality of life. Measures utilized were the questionnaire My Primary School from the Index for Inclusion and the Questionnaires on Assessment of Quality of Life for Children, self-report, and parents’ report. Participants are 69 regular students and 15 students with special education needs. Self-reports from regular children and proxy reports from the mothers of the special education needs students were analysed. Results indicated that there is an association between perceived inclusion and experiencing quality of life; having special needs does not impact on scores on QoL or inclusion; educational level does not impact on perceived QoL or inclusion for special education students. These results are discussed in light of a culture that appreciates diversity.  相似文献   

Distinct Influences of Mothers and Fathers on Kindergartners’ Numeracy Performance: The Role of Math Anxiety,Home Numeracy Practices,and Numeracy Expectations     

M. Francisca del Río  Maria Ines Susperreguy  Katherine Strasser  Viviana Salinas 《Early education and development》2017,28(8):939-955

The current study analyzed maternal and paternal differential influences on numeracy performance in kindergarten children. Participants were 180 Chilean children from backgrounds of low and high socioeconomic status (SES), their mothers, and their fathers. A path analysis was used to explore the influences of both maternal and paternal numeracy practices on children’s numeracy performance and the influences of maternal and paternal expectations and anxiety on those activities. Research Findings: Results showed that mothers and fathers who endorse higher numeracy expectations for their children and who report lower levels of math anxiety also report engaging more frequently in advanced numeracy practices with their children. Mothers’—but not fathers’—engagement in numeracy practices at home predicted children’s numeracy performance. Also, low-SES mothers engaged more frequently in numeracy practices with their children, and mothers in general engaged more often in numeracy activities with girls than with boys. Practice or Policy: These findings improve understanding of how maternal and paternal processes relate differently to numeracy performance in kindergarten children. Moreover, these results highlight the need to take into account parents’ numeracy attitudes and practices, as well as their SES, when designing interventions directed at increasing family support for math achievement.  相似文献   

“The Day That Changed My Life,Again”: The Testimonio of a Latino DACAmented Teacher     

Luis Enrique Juárez Treviño  José García  Eric Ruíz Bybee 《The Urban Review》2017,49(4):627-647

This article, based on the testimonio of a Latino DACAmented teacher, underscores the impacts and benefits of immigration policies for individuals and their communities. Deferred Action for Childhood Arrivals (DACA) has benefitted about 750,000 people; most have used the benefits to pursue higher education and to enter public service careers, including teaching and nursing. Mr. Juárez’s testimonio walks us through his educational trajectory and current role as an educator. This testimonio contributes to current debates and struggles demanding the new U.S. presidential administration to maintain DACA. As researchers, we urge students, educators, policymakers, and the incoming administration to listen to the testimonios of DACA beneficiaries prior to making hasty decisions that will have dire consequences for individuals, families, and the nation, as a whole.  相似文献   

Introduction to the Treatment of Non-Linear Effects Using a Gravitational Pendulum     

Klaus Weltner  Antonio Sergio C. Esperidião  Paulo Miranda 《Science & Education》2004,13(7-8):611-629

We show that the treatment of pendulum movement, other than the linear approximation,may be an instructive experimentally based introduction to the physics of non-lineareffects. Firstly the natural frequency of a gravitational pendulum is measured as functionof its amplitude. Secondly forced oscillations of a gravitational pendulum are investigatedexperimentally without limiting amplitudes. By this arrangement new phenomena, thebistability and the jump-effect, can be observed. In the case of bistability the drivengravitational pendulum can oscillate in two different stable modes. Either it oscillateswith a small amplitude and approximately in phase with the exciting torque or it oscillateswith a larger amplitude and approximately anti-phase. The jump effect is the spontaneoustransition from one mode of oscillation to the other. Both effects can be demonstrated andexplained.  相似文献   

Evaluating student allocation in the Portuguese public higher education system     

Miguel Portela  Nelson Areal  Carla Sá  Fernando Alexandre  João Cerejeira  Ana Carvalho  Artur Rodrigues 《Higher Education》2008,56(2):185-203

This paper characterizes and evaluates the student allocation in the Portuguese public higher education system. It describes the supply and demand sides of the system by looking at the numerus clausus across areas of study and institutions, institutions’ degree of diversity, and performance and adjustment indicators based on students’ revealed preferences. Performance indicators quantify the adequacy between demand and supply, across institutions and fields of study, and gauge the performance of public higher education institutions in the competition for candidates. Adjustment indicators allow us to predict the potential impact of changes in higher education regulations on student allocation and its stability. According to these indicators, such changes could result in an expansion for some institutions and fields of study, whereas other institutions might face a reduction.

Carla SáEmail:

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