Framing evolution discussion intellectually     

Alandeom W. Oliveira  Kristin Cook  Gayle A. Buck 《科学教学研究杂志》2011,48(3):257-280

This study examines how a first‐year biology teacher facilitates a series of whole‐class discussions about evolution during the implementation of a problem‐based unit. A communicative theoretical perspective is adopted wherein evolution discussions are viewed as social events that the teacher can frame intellectually (i.e., present or organize as exchanges of an intellectual nature). Furthermore, we characterize teacher framing of evolution discussion in terms of five communicative components: focus, orientation, social structure, mood, and participatory nature. Our video‐based analyses revealed that the teacher paid little attention to the conceptual contents and history of evolutionary theory, framing evolution discussions as moderately playful and partially mandatory events focused mainly on student sharing of ideas (i.e., personal opinions) and polite communication of evolution. Within this framing, the teacher adopted the role of a neutral (though admittedly biased) facilitator with an intermediary expert status (less knowledgeable than evolutionary biologists) and who was legally required (though also inclined) to discuss evolution. The main significance of this study is that it provides new and useful insights into social phenomena such as respect, politeness, and humor in the context of evolution discussion as well as a robust theoretical framework for analyzing evolution discussion from a social perspective. © 2010 Wiley Periodicals, Inc., Inc. J Res Sci Teach 48: 257–280, 2011  相似文献   

How and where is artificial intelligence in the public sector going? A literature review and research agenda     

Weslei Gomes de Sousa  Elis Regina Pereira de Melo  Paulo Henrique De Souza Bermejo  Rafael Araújo Sousa Farias  Adalmir Oliveira Gomes 《Government Information Quarterly》2019,36(4):101392

To obtain benefits in the provision of public services, managers of public organizations have considerably increased the adoption of artificial intelligence (AI) systems. However, research on AI is still scarce, and the advance of this technology in the public sector, as well as the applications and results of this strategy, need to be systematized. With this goal in mind, this paper examines research related to AI as applied to the public sector. A review of the literature covering articles available in five research databases was completed using the PRISMA protocol for literature reviews. The search process yielded 59 articles within the scope of the study out of a total of 1682 studies. Results show a growing trend of interest in AI in the public sector, with India and the US as the most active countries. General public service, economic affairs, and environmental protection are the functions of government with the most studies related to AI. The Artificial Neural Networks (ANN) technique is the most recurrent in the investigated studies and was pointed out as a technique that provides positive results in several areas of its application. A research framework for AI solutions for the public sector is presented, where it is demonstrated that policies and ethical implications of the use of AI permeate all layers of application of this technology and the solutions can generate value for functions of government. However, for this, a prior debate with society about the use of AI in the public sector is recommended.  相似文献   

Exclusory and transformative dimensions of adult environmental education in two Brazilian protected areas     

Mayla Willik Valenti  Haydée Torres de Oliveira  Amadeu José Montagnini Logarezzi 《Environmental Education Research》2017,23(5):675-686

This study addresses the limitations and potential for the development of an adult environmental education program in two protected areas in Brazil. The investigation was based on critical communicative methodology and involved 25 people variously related to puma conservation and environmental education. We found that the staff of protected areas had difficulties interacting with the local community. The main cited obstacle was the lack of infrastructure and staff, but partnerships with scientists and other institutions might help to overcome this limitation. As we identified a great diversity of potential audience, a dialogical process would be necessary to collectively identify community demands and seek solutions. Moreover, an adult environmental education program must consider the characteristics of adulthood and should promote diverse types of activities. In conclusion, we suggest that dialogical learning and critical communicative methodology can contribute to the development of the adult environmental education.  相似文献   

Self-selected or imposed exercise? A different approach for affective comparisons     

Bruno Ribeiro Ramalho Oliveira  Andréa Camaz Deslandes  Fábio Yuzo Nakamura  Bruno Ferreira Viana 《Journal of sports sciences》2015,33(8):777-785

The aim of this study was to compare the psychological and physiological responses of self-selected and imposed sessions of equivalent intensities and durations and allowing to participants a free control of pace during the self-selected session. Seventeen participants completed three sessions on a cycle ergometer. Participant’s VO_2Peak and lactate threshold were measured during an incremental exercise test. During the second and third sessions, participants could view a virtual cyclist on a monitor. During the self-selected session, participants were allowed free control of the intensity and duration. To ensure that the imposed session replicated the self-selected session in intensity, participants were instructed to follow an additional virtual cyclist, which was displayed on a monitor using the CompuTrainer 3D software. Power output and physiological and psychological variables were recorded during the sessions. A two-way ANOVA showed no effect of condition for power output (P = 0.940), heart rate (HR) (P = 0.965), VO₂ (P = 0.898), blood lactate (P = 0.667), Feeling Scale (P = 0.877), Felt Arousal Scale (P = 0.924) and CR100 (P = 0.939). A paired t-test showed no significant difference in Physical Activity Enjoyment Scale scores between sessions (P = 0.054). In contrast to previous studies, the self-selected session did not provide better affective responses than the imposed session with same intensity and duration.  相似文献   

Trademarks as an indicator of innovation and industrial change   总被引：1，自引：0，他引：1  

Sandro Mendonça  Tiago Santos Pereira 《Research Policy》2004,33(9):1385-1404

As innovation becomes an ever more central issue for the development of firms and world economies, so the need for improved assessments of innovative performance grows more urgent. This paper suggests that trademark analysis can contribute in capturing relevant aspects of innovation phenomena and the process of industrial change. We propose trademarks as a complementary indicator in the portfolio of available empirical tools of innovation studies and industrial dynamics. Our empirical exploration is based on a study of community trade marks (CTM), an intellectual property right granted in the European Union, and draws on recent research on trademarking trends in Portugal. Quantitative as well as qualitative data, including survey data from a representative sample of Portuguese manufacturing and services firms, are used to identify the advantages and limitations of this indicator.  相似文献   

Environmental education research in Brazil     

Flávia Torreão Thiemann  Luiz Marcelo de Carvalho  Haydée Torres de Oliveira 《Environmental Education Research》2018,24(10):1441-1446

Abstract

This Editorial to the current collection provides a brief historical, cultural, regional and contemporary picture of environmental education research in Brazil. Its main purpose is to offer readers a short background and orientation to the collection, and in so doing, illustrate how its contributions relate to some wider tendencies, trends and issues in environmental education, as well as to different locales of research and knowledge generation in the country. Of particular note for environmental education in Brazil are: the effects of social and political backdrops and issues, the unique environments on which environmental education is grounded, and how environmental education research, in turn, may echo or influence particular educational and public policies.  相似文献   

Revealing the decision-making of dribbling in the sport of futsal     

Umberto Cesar Corrêa  Silvia Teixeira de Pinho  Silvia Letícia da Silva  Fabian Alberto Romero Clavijo  Thiago de Oliveira Souza  Go Tani 《Journal of sports sciences》2016,34(24):2321-2328

ABSTRACT

This study aimed to investigate why futsal players decide to dribble. For this purpose, we analysed 396 trials comprising the dribbles (n = 132), passes (n = 131) or shots (n = 133), performed by 70 male futsal players. Passing and shooting angles, and interpersonal distance, including their rates of change (velocity and variability), were regarded as measures of interpersonal coordination tendency and a comparison was made among dribbling, passing and shooting situations. In addition, the variables identified as constraints on deciding to dribble were analysed in relation to age categories, dribbling outcomes and futsal court zone. Results revealed that passing and shooting angles, and interpersonal distance showed higher variability in dribbling than in passing and shooting situations. The findings allowed us to conclude that decision-making on dribbling was influenced by the variabilities of passing angles as well as shooting and interpersonal distance, and that success in dribbling was affected by the variability of interpersonal distance. Such variabilities were interpreted concerning their meaning of risk and/or uncertainty in the execution of motor skills.  相似文献   

Effects of fast-velocity eccentric resistance training on early and late rate of force development     

Anderson Souza Oliveira  Rogério Bulhões Corvino  Fabrizio Caputo  Per Aagaard 《European Journal of Sport Science》2016,16(2):199-205

This study examined whether short-term maximal resistance training employing fast-velocity eccentric knee extensor actions would induce improvements in maximal isometric torque and rate of force development (RFD) at early (<100 ms) and late phases (>100 ms) of rising torque. Twenty healthy men were assigned to two experimental groups: eccentric resistance training (TG) or control (CG). Participants on the TG trained three days a week for a total of eight weeks. Training consisted of maximal unilateral eccentric knee extensors actions performed at 180°s-1. Maximal isometric knee extensor torque (MVC) and incremental RFD in successive 50 ms time-windows from the onset contraction were analysed in absolute terms (RFD_INC) or when normalised relative to MVC (RFD_REL). After eight weeks, TG demonstrated increases in MVC (28%), RFD_INC (0–50 ms: 30%; 50–100 ms: 31%) and RFD_REL (0–50 ms: 29%; 50–100 ms: 32%). Moreover, no changes in the late phase of incremental RFD were observed in TG. No changes were found in the CG. In summary, we have demonstrated, in active individuals, that a short period of resistance training performed with eccentric fast-velocity isokinetic muscle contractions is able to enhance RFD_INC and RFD_REL obtained at the early phase of rising joint torque.  相似文献   

萝卜硫烷对脑线粒体的影响:机理观点和未来发展方向     

Fernanda Rafaela JARDIM  Fhelipe Jolner Souza de ALMEIDA  Matheus Dargesso LUCKACHAKI  Marcos Roberto de OLIVEIRA 《Journal of Zhejiang University. Science. B》2020,21(4):263-279

有机硫化物萝卜硫烷(SFN)是一种有效的细胞保护剂,在体外和体内实验模型中均可促进抗氧化、抗炎、抗糖化和抗菌作用。因为氧化磷酸化系统的存在,所以线粒体是三磷酸腺苷(ATP)的主要产生部位。同时,线粒体也是具核人体细胞中产生活性氧的主要场所。线粒体损伤在多种人类疾病中起着重要作用,包括神经退行性病变和代谢异常。本文描述和讨论了SFN调节哺乳动物细胞中线粒体功能和动力学的作用和机理,以及其对肿瘤细胞中线粒体促凋亡途径的促进作用。SFN对线粒体的调节作用使得它在一定程度上被认为是一种细胞保护剂。本文还指出了几个需要通过进一步实验解决的问题,即未来的可能研究方向,这可能会对该领域的研究人员具有指导作用。  相似文献   

Botany and environmental education in elementary school in Brazil: articulating knowledge,values, and procedures     

Jerônimo de Oliveira Loureiro  Rossano André Dal-Farra 《Environmental Education Research》2018,24(12):1655-1668

Abstract

The increasing urbanization and alienation from nature reduce children’s opportunities to interact with plants and challenge teachers to devise educational practices that contribute to learning botany. This study presents the results of activities developed in a Brazilian school through explorations, drawings, dried and pressed specimens, and semi-structured interviews. The data were evaluated using mixed methods analysis. Leaves were the structure that was most frequently drawn by 1st- and 2nd-year students, followed by stems. Among students in their 3rd, 4th, and 5th years, more emphasis was on flowers and their detailed morphological structures. The 1st- and 2nd-year students included non-living elements and the surrounding environment in their drawings, whereas the older students focused on the plant itself. These particularities point to methods of teaching botany in context and link students’ specific knowledge to values and practices that contribute to an environmental education that aims to minimize the utilitarian view of nature and move towards a view of human beings as integrated and interdependent with other living and non-living elements.  相似文献