Systematic lossy error protection based on H.264/AVC redundant slices and flexible macroblock ordering

INTRODUCTION In typical video transmission systems, a video signal is compressed, and the resulting bit stream is transmitted over an error-prone channel. The errors may consist of symbol errors caused by fading, as observed for wireless channels, or packet erasures caused by congestion, as observed in the Internet. If a received video packet contains errors, then the portion of the video signal contained in the packet is lost and must be concealed. Error concealment schemes alone cannot …     

Surfel-based surface modeling for robotic belt grinding simulation

INTRODUCTION The simulation and verification technologies of numerical controlled (NC) manufacturing processes have been developed since the end of the 1970s, and a lot of significant accomplishments have been achieved. This kind of technology has important im- pact on product development and quality control. The designed CAD model can be produced to virtually reduce or even eliminate expensive experiments on testing material. If any potential problem, such as collision, improper parame…     

Cultural Differences in Maternal Beliefs and Behaviors: A Study of Middle-Class Anglo and Puerto Rican Mother-Infant Pairs in Four Everyday Situations

This study examines cultural patterning in situational variability in mother-infant interactions among middle-class Anglo and Puerto Rican mothers and their 12 to 15-month-old firstborn children. Forty mothers were interviewed regarding their long-term socialization goals and childrearing strategies, and videotaped interacting with their infants in four everyday settings: feeding, social play, teaching, and free play. Results suggest that: (1) Anglo mothers place greater emphasis on socialization goals and childrearing strategies consonant with a more individualistic orientation, whereas Puerto Rican mothers place greater focus on goals and strategies consistent with a more sociocentric orientation; (2) coherence was found between mothers' childrearing beliefs and practices, with Puerto Rican mothers more likely to directly structure their infants' behaviors; and (3) situational variability arose in mother-infant interactions, but this variability showed a cultural patterning consistent with mothers' long-term socialization goals and childrearing beliefs.     

Discourses on information ethics: The claim to universality

An important question one can ask of ethical theories is whether and how they aim to raise claims to universality. This refers to the subject area that they intend to describe or govern and also to the question whether they claim to be binding for all (moral) agents. This paper discusses the question of universality of Luciano Floridi’s information ethics (IE). This is done by introducing the theory and discussing its conceptual foundations and applications. The emphasis will be placed on the ontological grounding of IE. IE’s claims to universality will be contrasted with those raised by discourse ethics. This comparison of two pertinent ethical theories allows for a critical discussion of areas where IE currently has room for elaboration and development.     

Inbound Open Innovation and Innovation Performance: A Robustness Study

In studies of firm's innovation performance, regression analysis can involve a significant level of model uncertainty because the ‘true’ model, and therefore the appropriate set of explanatory variables are unknown. Drawing on innovation survey data for France, Germany, and the United Kingdom, we assess the robustness of the literature on inbound open innovation to variable selection choices, using Bayesian model averaging (BMA). We investigate a wide range of innovation determinants proposed in the literature and establish a robust set of findings for the variables related to the introduction of new-to-the-firm and new-to-the-world innovation with the aim of gauging the overall healthiness of the literature. Overall, we find greater robustness for explanations for new-to-the-firm rather than new-to-the-world innovation. We explore how this approach might help to improve our understanding of innovation.     

Technology,capabilities and critical perspectives: what can critical theory contribute to Sen’s capability approach?

This paper explores what insights can be drawn from critical theory to enrich and strengthen Sen’s capability approach in relation to technology and human development. The two theories share some important commonalities: both are concerned with the pursuit of “a good life”; both are normative theories rooted in ethics and meant to make a difference, and both are interested in democracy. The paper provides a brief overview of both schools of thought and their applications to technology and human development. Three areas are identified where critical theory can make a contribution to the capability approach: conceptually, by providing a critical account of individual agency and enriching the concept of technology beyond the simplistic notion of commodities; methodologically, by sensitising towards reification and hegemony of scientific tools, and, finally, by emphasising reflexivity of researchers.     

Documentary ethics,ontology, and politics

Recent years have seen a sharp rise of attention to the importance of documentation in various disciplines in the social sciences. Many thinkers have found the concept of assemblages, which emphasizes complexity, heterogeneity, and emergence, fruitful for investigating the role of documents and documentation. This article analyses some examples from anthropology and management studies as contributions to documentary ethics, ontology, and politics. The first pair of case studies reveals a documentary activism of biological and therapeutic citizenship. The second pair shows how documentation works constitutively to bring different kinds of entities into being. Both kinds of cases practice a documentary politics, which is analyzed in terms of Bruno Latour’s ideas of “reassembling the social”.     

A multidimensional analysis of changes in mathematics motivation and engagement during high school

Despite concerns about declining interest and enrolments in mathematics, little research has examined change in a broad range of constructs reflecting mathematics motivation and engagement. The current study used an 11-factor model of motivation and engagement to evaluate levels of maths motivation compared to general academic motivation and to assess group-level and individual-level changes in maths motivation during secondary school. In a multicohort-multioccasion design, Australian students completed an adaptation of the Motivation and Engagement Scale in two consecutive school years. Ratings in mathematics were lower than general academic motivation on several scales but particularly on the planning and task management scales and for the year seven cohort. Mean ratings of valuing and task management decreased over the two years, while stability of mathematics motivation was moderate. Girls reported stronger anxiety, uncertain control and failure avoidance than boys, despite also reporting greater mastery focus. The findings demonstrate that a multidimensional model facilitates a differentiated analysis of possible reasons for a waning interest in mathematics.