Steady-state invariant control systems under disturbances satisfying differential equations     

Osvaldo M. Grasselli  Fernando Nicolo&#x; 《Journal of The Franklin Institute》1976,301(3):287-305

This paper deals with the problem of regulating the output of a linear multivariable system affected by disturbances satisfying a given linear differential equation. Conditions are given for the existence of a linear controller such that the overall control system is asymptotically stable and the regulated output goes asymptotically to zero for any disturbance of the given class. Only the regulated outputs are assumed to be measured. Moreover, procedures are presented for the synthesis of the controller.  相似文献   

Data-mining techniques in detecting factors linked to academic achievement     

Fernando Martínez Abad  Alicia A. Chaparro Caso López 《School Effectiveness & School Improvement》2017,28(1):39-55

In light of the emergence of statistical analysis techniques based on data mining in education sciences, and the potential they offer to detect non-trivial information in large databases, this paper presents a procedure used to detect factors linked to academic achievement in large-scale assessments. The study is based on a non-experimental, cross-sectional design and a sample of 18,935 high school students from 99 educational institutions in Baja California state (Mexico). The information was collected from ENLACE tests and context surveys given to students in Baja Caclifornia. Decision trees were used to apply classification techniques, and the results indicate that personal factors are most indicative of academic performance, followed by school-related and social factors. In conclusion, the paper discusses the similarities between the results obtained and those shown in literature, highlighting how simple decision trees allow a greater explanation and interpretation than other models and techniques.  相似文献   

Examining teachers’ perceptions of K‐11 students’ 21st century skills and student performance     

Suzanne Woods‐Groves  Taehoon Choi  Allison Leigh Bruhn  Josephine Fernando 《Psychology in the schools》2019,56(9):1434-1454

This study examined the relationship of teachers’ ratings of students’ 21st century skills (i.e., persistence, curiosity, externalizing and internalizing affect, and cognition) via the Human Behavior Rating Scale: Brief (HBRS: Brief; Eaves & Woods‐Groves, 2011) with student performance. Midwestern K‐11 teachers (n = 96) rated students (n = 1,689) via the HBRS: Brief and the Strengths and Difficulties Questionnaire (SDQ; Goodman, 1997). Students’ academic (i.e., standardized tests) and behavioral (i.e., office discipline referrals [ODRs] and absences) performance was compared with HBRS: Brief ratings. Hierarchical linear modeling revealed that teachers’ ratings of students’ 21st century skills were related to the following: (a) Persistence with SDQ conduct problems, academic performance, and absences; (b) curiosity with SDQ emotional symptoms; (c) externalizing affect with SDQ conduct problems, academic performance, and ODRs; (d) internalizing affect with SDQ emotional symptoms and academic performance, and (e) cognition with academics.  相似文献   

Career guidance and health promotion with adolescents: keys for intervention programs     

Fernando Henrique Rezende Aguiar  Maria Inês Gandolfo Conceição 《International Journal for Educational and Vocational Guidance》2015,15(3):221-236

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Erratum: Spanish savings banks: a view on intangibles     

Carlos Serrano-Cinca  Cecillo MarMoliero  Fernando Chaparro 《知识管理研究与实践》2004,2(3):201-201

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Orthographic learning in Spanish children: influence of previous semantic and phonological knowledge     

Marta lvarez‐Caizo  Paz Surez‐Coalla  Fernando Cuetos 《Journal of Research in Reading》2019,42(1):137-149

Orthographic learning is one of the steps needed to achieve reading fluency. There are different variables that could influence the formation of orthographic representations. The aim of this study was to investigate the role of the previous semantic and phonological knowledge on the formation of orthographic representations. We used a decrease of the length effect as the measure of orthographic learning. We made a reading aloud task that utilised new words with Spanish children from third grade under three different conditions: with prior semantic and phonological training, with prior phonological training and without training. Results showed that knowing the meaning and the phonological form of the words facilitated the formation of orthographic representations, as the length effect was significantly lower than in the other conditions, and it also improved the children's reading performance.  相似文献   

A study of writing mechanisms in Spanish primary education children / Estudio de los mecanismos de escritura en niños españoles de Educación Primaria     

Nagore González-Martín  Paz Suárez-Coalla  Olivia Afonso  Fernando Cuetos 《Infancia y Aprendizaje》2017,40(1):88-119

Several studies performed on deep orthography systems reveal variables that influence writing latencies that occur over the course of learning. In transparent orthographies such as Spanish there are very few studies on writing that measure latencies and duration. The aim of this present study was to take a more in-depth look at knowledge of the writing mechanisms used by Spanish children in primary education, by studying the errors, latencies and duration of the writing of words. To do this, sixty children performed a copying task and a dictation task with regular words of different frequency and length. The obtained results show changes in the writing mechanisms used by the children as they became more expert, as indicated by the greater effect of word length in the first years of primary. This word length effect is a more determining factor with regard to the number of letters in words than for the number of syllables. These results hold important implications for the teaching of writing in Spanish.  相似文献   

The mattress makers: emotions and value proposal in Atlético de Madrid     

Jesus Rodriguez-Pomeda  Fernando Casani  Maria del Mar Alonso-Almeida 《Soccer & Society》2016,17(1):1-17

Atlético de Madrid (ATM) Football Club has a single-hearted fan base regardless of the sport results, unlike megaclub’s fandoms (like Real Madrid, from the same city) that demand a steady stream of sporting triumphs. Literature is sparse about how second line clubs that must compete with megaclubs from the same city for a fan base develop a sustainable value proposal based on their fans’ emotions. We analyse the content of interviews with followers, TV-ads and financial statements to deal with ATM’s emotional base comprised of eleven emotions. Emotions like pride secure a fandom base loyal to ATM even in the absence of wins. Findings suggest that ATM’s value proposal (based on fandom satisfaction) focuses on a niche of fierce modern-style supporters with emotions attuned to the club’s performance.  相似文献   

Non-linear resistance training reduces inflammatory biomarkers in persons living with HIV: A randomized controlled trial     

Hugo Ribeiro Zanetti  Lucas Gonçalves da Cruz  Camilo Luís Monteiro Lourenço  Fernando de Freitas Neves  Mário Leon Silva-Vergara  Edmar Lacerda Mendes 《European Journal of Sport Science》2016,16(8):1232-1239

The purpose of this study is to analyse the effect of 12 weeks of non-linear resistance training (NLRT) on anthropometry, muscle strength and inflammatory biomarkers in persons infected with human immunodeficiency virus (PIHIV). Thirty previously sedentary PIHIVs were randomized into the NLRT (n?=?15) and control (CON, n?=?15) groups. NLRT group were submitted to 12 weeks of training, whereas the CON group maintained their daily habits. At baseline and after 12 weeks, both groups underwent anthropometric evaluations and blood sampling for the analysis of inflammatory biomarkers. Analysis of covariance using preintervention values as covariate was performed to determine the effects of exercise on anthropometry, muscle strength, cytokines levels and T cells. Significance was set at p?p?p p?=?.009), blood levels of interleukin (IL)-1β (p?=?.029), IL-6 (p?=?.005), IL-8 (p?=?.010), and tumour necrosis factor (TNF)-α (p?=?.001) and an increase in muscle strength (p?p?=?.030) and CD4⁺ (p?=?.004) and CD8⁺ (p?相似文献   

Teachers as Change‐agents in Special Educational Needs: experience in England     

John Alban Metcalfe  Fernando Almeida Diniz 《欧洲师范教育杂志》1991,14(2):139-148

Parallel developments in England, Wales and in Scotland have led to the establishment of posts for teachers which enable them to be effective agents of change. Research, publications and initiatives sponsored by national government, local education authorities and voluntary organisations have led to the identification of ways in which educational provision for pupils with special needs can best be made, and to the enunciation of criteria for evaluating such provision. Teacher trainers have responded with innovative approaches to course development; two case studies are offered.  相似文献