Communicative act development

How do children learn to map linguistic forms onto their intended meanings? This chapter begins with an introduction to some theoretical and analytical tools used to study communicative acts. It then turns to communicative act development in spoken and signed language acquisition, including both the early scaffolding and production of communicative acts (both non-verbal and verbal) as well as their later links to linguistic development and Theory of Mind. The chapter wraps up by linking research on communicative act development to the acquisition of conversational skills, cross-linguistic and individual differences in communicative experience during development, and human evolution. Along the way, it also poses a few open questions for future research in this domain

IST Austria Thesis

Social insect colonies tend to have numerous members which function together like a single organism in such harmony that the term ``super-organism'' is often used. In this analogy the reproductive caste is analogous to the primordial germ cells of a metazoan, while the sterile worker caste corresponds to somatic cells. The worker castes, like tissues, are in charge of all functions of a living being, besides reproduction. The establishment of new super-organismal units (i.e. new colonies) is accomplished by the co-dependent castes. The term oftentimes goes beyond a metaphor. We invoke it when we speak about the metabolic rate, thermoregulation, nutrient regulation and gas exchange of a social insect colony. Furthermore, we assert that the super-organism has an immune system, and benefits from ``social immunity''. Social immunity was first summoned by evolutionary biologists to resolve the apparent discrepancy between the expected high frequency of disease outbreak amongst numerous, closely related tightly-interacting hosts, living in stable and microbially-rich environments, against the exceptionally scarce epidemic accounts in natural populations. Social immunity comprises a multi-layer assembly of behaviours which have evolved to effectively keep the pathogenic enemies of a colony at bay. The field of social immunity has drawn interest, as it becomes increasingly urgent to stop the collapse of pollinator species and curb the growth of invasive pests. In the past decade, several mechanisms of social immune responses have been dissected, but many more questions remain open. I present my work in two experimental chapters. In the first, I use invasive garden ants (*Lasius neglectus*) to study how pathogen load and its distribution among nestmates affect the grooming response of the group. Any given group of ants will carry out the same total grooming work, but will direct their grooming effort towards individuals carrying a relatively higher spore load. Contrary to expectation, the highest risk of transmission does not stem from grooming highly contaminated ants, but instead, we suggest that the grooming response likely minimizes spore loss to the environment, reducing contamination from inadvertent pickup from the substrate. The second is a comparative developmental approach. I follow black garden ant queens (*Lasius niger*) and their colonies from mating flight, through hibernation for a year. Colonies which grow fast from the start, have a lower chance of survival through hibernation, and those which survive grow at a lower pace later. This is true for colonies of naive and challenged queens. Early pathogen exposure of the queens changes colony dynamics in an unexpected way: colonies from exposed queens are more likely to grow slowly and recover in numbers only after they survive hibernation. In addition to the two experimental chapters, this thesis includes a co-authored published review on organisational immunity, where we enlist the experimental evidence and theoretical framework on which this hypothesis is built, identify the caveats and underline how the field is ripe to overcome them. In a final chapter, I describe my part in two collaborative efforts, one to develop an image-based tracker, and the second to develop a classifier for ant behaviour

Turn taking, timing, and planning in early language acquisition

Young children answer questions with longer delays than adults do, and they don't reach typical adult response times until several years later. We hypothesized that this prolonged pattern of delay in children's timing results from competing demands: to give an answer, children must understand a question while simultaneously planning and initiating their response. Even as children get older and more efficient in this process, the demands on them increase because their verbal responses become more complex. We analyzed conversational question-answer sequences between caregivers and their children from ages 1;8 to 3;5, finding that children (1) initiate simple answers more quickly than complex ones, (2) initiate simple answers quickly from an early age, and (3) initiate complex answers more quickly as they grow older. Our results suggest that children aim to respond quickly from the start, improving on earlier-acquired answer types while they begin to practice later-acquired, slower ones

Towards signal-power integrity analysis by efficient power delivery network lumped models obtained from parameter extraction

The combined signal integrity (SI) and power integrity (PI) design process is getting more relevant and complex as a result of the continuous computing system performance growth. This complexity drives longer design cycle times using traditional tools and methods. In this paper, a low computational cost optimization method based on a parameter extraction (PE) technique is proposed to develop accurate and fast power delivery network (PDN) lumped models. Once this model is available, it is used in the simulation process during the SI and PI analysis, making the whole design process much more efficient. Our proposed methodology is applied to a classical dual data rate (DDR) memory sub-system problem, saving 99.8% of the analysis time with only 1.2% of the computational resources typically used in current industrial practices.ITESO, A.C

Cytochemical Responses in the Digestive Tissue of Mytilus edulis Complex Exposed to Microencapsulated PAHs or PCBs

Cytochemical responses in the digestive tissue of Mytilus edulis complex fed a microencapsulated mixture of PAHs (composed of phenanthrene, fluoranthene and benzo[a]pyrene) or PCBs (Aroclor 1254) were evaluated. Lysosomal membrane labilization period and lipofuscin content of digestive tissue were significantly decreased and increased, respectively, after 30 days of exposure to PAHs but not PCBs. NADPH-ferrihemoprotein reductase activity in the digestive tissue was significantly increased after 30 days exposure to both PAHs and PCBs, whereas catalase activity was significantly increased only after exposure to PCBs. Neutral lipid content and gamma-glutamyl transpeptidase activity of digestive tissue of mussels were significantly increased and decreased, respectively, after 30 days exposure to both PAHs and PCBs when compared to untreated mussels, but were not significantly different when compared to mussels treated with com oil representing the vehicle control. Exposure to PAHs induced peroxisome proliferation in the digestive tissue of M. edulis complex. The observed cytochemical responses in the digestive tissue of M. edulis complex exposed to PAHs and PCBs in the laboratory are comparable to the cytochemical responses observed in the digestive tissue of mussels collected in the field from sites contaminated with predominantly PAHs and PCBs

Relaciones humanas en el ámbito laboral de una institución financiera

El 60% de la población en México se encuentra desconectado de su trabajo y el 28% lo repudia (Adams, 2013). Esto se debe a que en algunas empresas las relaciones interpersonales se caracterizan por escasa comunicación entre colaboradores, a que no se motiva al personal; no se les reconoce el buen desempeño; no se les proporcionan los insumos que su labor requiere y a que no se les presentan desafíos. Ante esta problemática, se realizó un taller dirigido a gerentes de sucursal de una institución financiera cuyo objetivo era fomentar el autoconocimiento para identificar áreas de oportunidad en sus relaciones interpersonales, a partir de las ideas del enfoque centrado en la persona. Se partió del supuesto que en un clima de confianza donde no se emitan juicios, las personas pueden explorar sus ideas, conductas, actitudes y sentimientos y, por tanto, aprender sobre sí mismas. El proceso de facilitación fue de seis sesiones. Se documentó la intervención y fue analizada mediante procedimientos de la investigación cualitativa. Se logró crear un ambiente seguro en donde los participantes externaron haber logrado conocerse más e identificar acciones que los puede llevar tener mejores relaciones interpersonales como motivar y escuchar a sus empleados, ser más empáticos con ellos y reconocerles sus logros

Estudio comparativo de las propiedades magnéticas de ferritas hexagonales de Bario obtenidas por los métodos de coprecipitación y microemulsión

Por el m todo de coprecipitaci n qu mica se obtuvo un precursor formado por hidr xidos y carbonatos de hierro y bario que al calcinarlo a temperaturas superiores a 730oC se transforma en ferrita de bario. Al calcinar el precursor durante 2 horas se obtuvo la magnetizaci n m xima de 59.1 emu/g para la temperatura de 925oC. Por el m todo de microemulsi n se obtuvo un precursor fino de hidr xidos y carbonatos de hierro y bario que al calcinarlo a temperaturas superiores a 760oC se transforma en ferrita de bario. Al calcinar el precursor durante 12 horas se obtuvo la magnetizaci n m xima de 60.5 emu/g para la temperatura de 925oC. La coercitividad intr nseca del polvo de ferrita de bario obtenido por microemulsi n result ser un 20% menor que la coercitividad intr nseca del polvo de ferrita de bario obtenido por coprecipitaci n. Esta menor coercitividad debe favorecer al m todo de microemulsi n para la producci n de part culas de ferrita de bario que sirvan como medio de grabaci n magn tica perpendicular.Peer reviewe

The challenge of making reliable carbon abatement estimates: the case of diesel microgrids

Carbon abatement cost curves can help guide policy decisions related to cost effective carbon mitigation. Carbon abatement cost curves are often presented at the national or international level, aggregating mitigation measures across local and regional scales. In this paper, we show how the microgrid optimization model, HOMER, can be used to construct a micro-level carbon abatement cost curve and may be used to explore conservation and supply measures at the local level. As an example, we highlight the subtle challenges of estimating the carbon reduction and abatement costs in a diesel microgrid. Most carbon mitigation measures decrease the load on the diesel generator, and thus its efficiency. It is critical to understand how energy efficiency and conservation measures impact diesel plant efficiency, to insure a net reduction in emissions. It is also important to understand how revenue streams may be impacted by certain mitigation efforts, a point that is rarely addressed in most macro-level abatement curve analyses. In the case of electricity systems, demand-side conservation measures can lead to savings by consumers and revenue loss to utilities. The electricity rate structure may need to be altered in order to compensate profit-making utilities, and encourage investment in conservation. In the case of a subsidized electric system, where the utility is losing money on each unit of energy generated, energy conservation results in savings to both the utility and the consumer