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Parental monitoring of children’s television viewing is an important family practice that helps children understand the messages they find on advertisements and program content. Research points at different dimensions of monitoring, including parental co-viewing, rules about when and how much time children can watch television, and active parental mediation. The study describes different dimensions of parental monitoring in a sample of 303 caregivers of primary school children living in Lima. Main findings reveal that about a third of the sample engaged in parental monitoring never, rarely or sometimes, the education level of the caregiver was positively associated with limiting the time children can watch television, and that child’s age was negatively associated with the frequency of active mediation and limits on the content children may watch on TV. Further research is needed in order to understand the practice of parental monitoring across children’s age groups in the context of Peru.  相似文献   
243.
We adapt the cluster hypothesis for score-based information retrieval by claiming that closely related documents should have similar scores. Given a retrieval from an arbitrary system, we describe an algorithm which directly optimizes this objective by adjusting retrieval scores so that topically related documents receive similar scores. We refer to this process as score regularization. Because score regularization operates on retrieval scores, regardless of their origin, we can apply the technique to arbitrary initial retrieval rankings. Document rankings derived from regularized scores, when compared to rankings derived from un-regularized scores, consistently and significantly result in improved performance given a variety of baseline retrieval algorithms. We also present several proofs demonstrating that regularization generalizes methods such as pseudo-relevance feedback, document expansion, and cluster-based retrieval. Because of these strong empirical and theoretical results, we argue for the adoption of score regularization as general design principle or post-processing step for information retrieval systems.
Fernando DiazEmail:
  相似文献   
244.
ABSTRACT

The administration of the Spanish State is based on a decentralised model consisting of 17 autonomous regions. Castilla y León represents the largest region in Spain and the third largest in the European Union. Our analysis of both national and regional (Castilla y León) legislation on the rights of children and youth with Specific Needs of Educational Support (SNES) to participate in education suggests that the relevant legislation incorporates the minimum standards proposed by various international organisations (UNCRC, UNCRPD). Nevertheless, socio-educational organisations and researchers report limitations and setbacks to the participation of children and young people in Castilla y León, which especially impact on children with SNES: no representation on Primary and Special Education School Boards, socio-economic segregation at some schools, and scarce social participation with disadvantages for girls and other vulnerable groups. In view of these challenges, we set out to ascertain the impact of legislation on the rights of children, by listening to the voices of children with SNES. Our research, a replication of a British project, is adapted to our region. We expect to perform comparative analyses, to learn from other examples of good practice, and to offer innovative proposals for international implementation and dissemination.  相似文献   
245.
In this work a procedure for obtaining polytopic λ-contractive sets for Takagi–Sugeno fuzzy systems is presented, adapting well-known algorithms from literature on discrete-time linear difference inclusions (LDI) to multi-dimensional summations. As a complexity parameter increases, these sets tend to the maximal invariant set of the system when no information on the shape of the membership functions is available. λ-contractive sets are naturally associated to level sets of polyhedral Lyapunov functions proving a decay-rate of λ. The paper proves that the proposed algorithm obtains better results than a class of Lyapunov methods for the same complexity degree: if such a Lyapunov function exists, the proposed algorithm converges in a finite number of steps and proves a larger λ-contractive set.  相似文献   
246.
Education and Information Technologies - This article presents an analysis of contradictions expressed by pre-service mathematics teachers when performing two modeling tasks using their own...  相似文献   
247.
Reading is an essential activity for learning at university, but lecturers are not always experienced in setting appropriate questions to test understanding of texts. In other words, their assessments may not be ‘constructively aligned’ with the learning outcomes they hope their students to exhibit. In examination conditions, questions may be set with insufficient time for re-reading available texts, thus drawing more on students' powers of recall than on deeper learning and comprehension. Previous research has been undertaken on reading comprehension generally, but no research has yet explored the interaction of factors such as text availability (re-reading of texts), text layout, question type and respondents' language background. This study explores the correctness of 50 participants' responses to a set reading task based on an expository text, and participants' confidence in giving those answers, in relation to four factors: the effects of question type; text availability; text layout; and language background. The main findings are that non-native speakers of English have more difficulty and less confidence in answering implicit questions and that reviewing the text has a significant effect on response correctness for implicit questions. The form of text layout did not show a significant effect, however. Our results have implications for lecturers who set readings and questions for comprehension and others who use reading comprehension as part of their ‘hidden curriculum’. Further research in this area is required to determine more precisely the effects of language background.  相似文献   
248.
This study explores the factors affecting the development of academic excellence on a group of 33 high-achieving engineering students. Participants were interviewed individually to explore several personal and contextual aspects of their past and current academic pathways. The results obtained reflect three main contributions to the conceptualization and understanding of excellence in academic contexts: the need to adopt a multidimensional and dynamic view about the concept of excellence; the existence of a variety of possible pathways and environmental conditions to achieve excellence; and the understanding of excellence as a process undergoing continuous development, which thrives within the family context and school environment, and that seems to be continuously nurtured by individuals in interaction with their contexts.  相似文献   
249.
Additivity-related assumptions have been proven to modulate blocking in human causal learning. Typically, these assumptions are manipulated by means of pretraining phases (including exposure to different outcome magnitudes), or through explicit instructions. In two experiments, we used a different approach that involved neither pretraining nor instructional manipulations. Instead, we manipulated the causal structure in which the cues were embedded, thereby appealing directly to the participants’ prior knowledge about causal relations and how causes would add up to yield stronger outcomes. Specifically, in our “different-system” condition, the participants should assume that the outcomes would add up, whereas in our “same-system” condition, a ceiling effect would prevent such an assumption. Consistent with our predictions, Experiment 1 showed that, when two cues from separate causal systems were combined, the participants did expect a stronger outcome on compound trials, and blocking was found, whereas when the cues belonged to the same causal system, the participants did not expect a stronger outcome on compound trials, and blocking was not observed. The results were partially replicated in Experiment 2, in which this pattern was found when the cues were tested for the second time. This evidence supports the claim that prior knowledge about the nature of causal relations can affect human causal learning. In addition, the fact that we did not manipulate causal assumptions through pretraining renders the results hard to account for with associative theories of learning.  相似文献   
250.
School leaders can ally with other educational stakeholders to encourage undocumented student persistence in Pk-12 schools. We explore (1) how school leaders create systems of support for undocumented and newly arrived immigrant students, and (2) how school leaders interpret and implement policies or school structures that affect student educational access. Border crossing theory guides our examination of how school leaders traverse and transgress borders that can impede students' education. This embedded case study included interviews with nine administrators working on the US-México border. The study finds that leaders expected to make a difference in students' lives by focusing on relationships and programming, committing to equity, and resisting deficit thinking about students and their families.  相似文献   
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