On the Commodification of Science: The Programmatic Dimension     

Marcos Barbosa de Oliveira 《Science & Education》2013,22(10):2463-2483

The article is a partial result of a wider research project, in which the commodification of science is interpreted, from one point of view, as a facet of the rise of neoliberalism, and from another, as a set of processes, classified according to a three-category taxonomy. Only one of the taxonomy’s categories is dealt with in this article, the one that concerns the processes that affect the programme of scientific research. First a sketch is presented of the historical background and the periodization of the most relevant epoch for the study of the commodification of science, namely, the one from the end of World War II to the present. The periodization is expressed in the notions of Golden Years science and neoliberal science. The ensuing sections have the aims: to show that, in Golden Years science, the processes shaping research programmes did not include commodification; to characterize the period of transition of the 70 s; to describe the processes of commodification that have impact on the research programmes of neoliberal science; to discuss criticisms that have been levelled against them, as well as proposals for better ways of conducting scientific practices, and their implications for science education (which are of the same nature as that of Science & Education’s editorial line); and finally, to bring to light the differences between developed and emerging countries as far as the commodification of science is concerned.  相似文献   

Deafness and attention in deaf children     

Guarinello AC  Berberian AP  De Oliveira Santana AP  De Athaíde Massi G 《American annals of the deaf》2006,151(5):499-507

The study shows the differences between hearing parents and deaf instructors interacting with deaf children and directing their attention. Data were collected at home and at a service for special needs in Bristol, England. The mother or instructor was asked to play naturally with the child with the toys provided. When the child's attention was focused during their play, the mother or instructor had to try to direct the child's attention to each of the toys. The results suggest that both groups (mothers and instructors) were effective in directing attention to objects not in the immediate area of play; however, hearing mothers were more successful than deaf instructors.  相似文献   

Developing Elementary Teachers’ Understandings of Hedges and Personal Pronouns in Inquiry-Based Science Classroom Discourse     

Alandeom W. Oliveira 《Journal of Science Teacher Education》2010,21(1):103-126

This study examined the effectiveness of introducing elementary teachers to the scholarly literature on personal pronouns and hedges in classroom discourse, a professional development strategy adopted during a summer institute to enhance teachers’ social understanding (i.e., their understanding of the social functions of language in science discussions). Teachers became aware of how hedges can be employed to remain neutral toward students’ oral contributions to classroom discussions, invite students to share their opinions and articulate their own ideas, and motivate students to inquire. Teachers recognized that the combined use of I and you can render their feedback authoritative, you can shift the focus from the investigation to students’ competence, and we can lead to authority loss. It is argued that explicitness, reflectivity, and contextualization are essential features of professional development programs aimed at improving teachers’ understandings of the social dimension of inquiry-based science classrooms and preparing teachers to engage in inquiry-based teacher–student interactions.  相似文献   

A Counselling Experiment in Brazil: Difficulties and Opportunities     

Leila M. L. Oliveira 《Pastoral Care in Education》2013,31(1):26-29

This paper compares the No Blame approach to bullying with the ecosystemic approach to changing problem behaviour. It suggests that there are several similarities between the two approaches: they are both applicable in particular kinds of situation; their success depends to a great extent on the people using the technique, in particular the degree to which they can bring the quality of genuineness to the situation; they are not directly concerned with punishment, truth or control; and they challenge the assumptions teachers make about children's problem behaviour. A key point is the need for teachers to recognize that bullying is a natural event (in so far that it is a regular one) and the need to suspend their own feelings of anger and repugnance. As the writer points out, ‘a process which fails to engage the bully and makes no attempt to enhance feelings of concern and understanding is unlikely to bring about any fundamental change in behaviour’. Though written at a fairly theoretical level, what the writer says has direct relevance to practice in schools.  相似文献   

Output-feedback binary adaptive control of MIMO systems using monitoring function     

Renato Borba Teixeira  Tiago Roux Oliveira  Ramon Romankevicius Costa  Liu Hsu 《Journal of The Franklin Institute》2021,358(3):1715-1742

The problem of adaptive control design for multivariable linear time-invariant plants with unknown control direction is considered. A solution is proposed based on the SDU factorization of the high frequency gain matrix (HFG) and the monitoring function approach. The adaptation scheme is the binary model reference adaptive control (BMRAC) which utilizes parameter projection and sufficiently high adaptation gains. The signs of the leading principal minors of the HFG define the control directions, and the lack of knowledge of which is a major challenge in the multivariable framework. The role of the monitoring function is to monitor the output error transient and then provide the necessary changes of the adaptation gain signs to guarantee a stable adaptive control. In addition to proving the signal boundedness of the resulting closed-loop system, the output tracking error is shown to be asymptotically as well as exponentially practically stable, i.e., exponentially stable with respect to a small residual compact set of size inversely proportional to the BMRAC adaptation gain. The latter implies good transient properties of the output tracking error in contrast to conventional adaptive laws which only guarantee asymptotic stability but can lead to extremely slow error convergence. The extension of the proposed approach to matched disturbances is also briefly discussed following the classical paradigm of disturbance estimators. Numerical results with a visual servoing application illustrate the efficiency of the proposed method.  相似文献   

Leg preference and interlateral asymmetry of balance stability in soccer players     

Teixeira LA  de Oliveira DL  Romano RG  Correa SC 《Research quarterly for exercise and sport》2011,82(1):21-27

To examine the effect of long lasting practice on pedal behavior in sport, we compared experienced adult soccer players and nonsoccer players on leg preference in motor tasks requiring general mobilization, soccer related mobilization, and body balance stabilization. We also evaluated performance asymmetry between the right and left legs in static and dynamic unipedal body balance, based on center of pressure displacement, and correlated that with leg preference in balance stabilization tasks. Results revealed (a) a distinct leg preference between mobilization and stabilization tasks, which were significantly different between players and nonplayers, (b) similar balance stability between the right and left legs, (c) greater stability of experienced players compared with nonplayers in static and dynamic balance, and (d) absence of a significant leg preference correlation with interlateral balance asymmetry. These results suggest an effect of extensive soccer skill practice on establishing leg preference for specific mobilization tasks and overall balance control.  相似文献   

Stability of elite freestyle performance from childhood to adulthood     

Costa MJ  Marinho DA  Bragada JA  Silva AJ  Barbosa TM 《Journal of sports sciences》2011,29(11):1183-1189

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Teacher Accommodation of Academic Language During Head Start Pre-Kindergarten Read-Alouds     

Erica M. Barnes  Alandeom W. Oliveira  David K. Dickinson 《Journal of Education for Students Placed at Risk》2013,18(4):369-393

Abstract

Little analytical scrutiny has been devoted to teacher accommodation of academic language at the early childhood level, despite being a critical school-level factor to consider when addressing at-risk learners’ academic needs. The present study investigates how fifteen Head Start teachers support three components of academic language during whole-class read-alouds of narrative storybooks: academic vocabulary, conceptual knowledge, and complex syntax. Pairing a corpus-based analysis of linguistic features and content analyses of teachers’ extratextual utterances, we describe teachers’ strategies for accommodating at-risk children’s early experiences with linguistically and syntactically complex texts. Our findings indicate that teachers simplified the language of the texts to accommodate student need, while also providing examples of academic talk through defining terms and providing conceptually-rich talk. Although teachers provided rich support for academic vocabulary, less accommodation was made for complex syntax. Practical and theoretical implications are addressed.  相似文献   

The Lived Experiences of Clinical Mental Health Counseling Internship Students Providing Home-Based Therapy     

Walker  Denise M.  Teles Oliveira  Joy  Hendricks  LaVelle 《International journal for the advancement of counseling》2022,44(2):337-355

Home-based therapy has become an ongoing trend within the mental health field. This transcendental phenomenologically designed study explored the lived experiences of clinical mental health counseling internship students (N=8) who provided home-based therapy as their primary method of gaining required clinical experience for the completion of their master’s degree. The overall personal and professional development of the students providing therapy in this setting was explored. Insights of the internship students regarding their experiences and challenges in providing home-based therapy were revealed. Recommendations based on the experiences of the students providing home-based therapy were offered. Implications to students, counselor educators, and supervisors have also been provided.

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Extensional flow of hyaluronic acid solutions in an optimized microfluidic cross-slot device     

S. J. Haward  A. Jaishankar  M. S. N. Oliveira  M. A. Alves  G. H. McKinley 《Biomicrofluidics》2013,7(4)

We utilize a recently developed microfluidic device, the Optimized Shape Cross-slot Extensional Rheometer (OSCER), to study the elongational flow behavior and rheological properties of hyaluronic acid (HA) solutions representative of the synovial fluid (SF) found in the knee joint. The OSCER geometry is a stagnation point device that imposes a planar extensional flow with a homogenous extension rate over a significant length of the inlet and outlet channel axes. Due to the compressive nature of the flow generated along the inlet channels, and the planar elongational flow along the outlet channels, the flow field in the OSCER device can also be considered as representative of the flow field that arises between compressing articular cartilage layers of the knee joints during running or jumping movements. Full-field birefringence microscopy measurements demonstrate a high degree of localized macromolecular orientation along streamlines passing close to the stagnation point of the OSCER device, while micro-particle image velocimetry is used to quantify the flow kinematics. The stress-optical rule is used to assess the local extensional viscosity in the elongating fluid elements as a function of the measured deformation rate. The large limiting values of the dimensionless Trouton ratio, Tr ∼ O(50), demonstrate that these fluids are highly extensional-thickening, providing a clear mechanism for the load-dampening properties of SF. The results also indicate the potential for utilizing the OSCER in screening of physiological SF samples, which will lead to improved understanding of, and therapies for, disease progression in arthritis sufferers.  相似文献